Patent Grant
9586794
Winches are well known. A conventional winch includes a drum; a crank arm configured to, when turned, rotate the drum; and a rope, cable, chain, wire, or strap having one end attached to the drum. In operation, when a user turns the crank arm in one direction, the winch winds the rope onto the drum, and when the user turns the crank arm in the opposite direction, the winch winds the rope off of the drum.
Winches are typically used (occasionally in conjunction with pulley systems) to lift objects, to lower objects, and/or to pull objects. A winch has an initial mechanical advantage that determines how difficult it is to initially turn the crank arm to lift (or lower or pull) the object and how many turns of the crank arm it takes to lift (or lower) the object to a desired height (or to pull the object a desired distance). The initial mechanical advantage of the winch is based in part on: (a) an outer diameter of the drum of the winch (and the outer circumference of the drum of the winch, which is calculated using the outer diameter); (b) the size and quantity of any gears employed in the winch; and (c) the length of the crank arm. The winch provides the initial mechanical advantage when the rope is wound completely off of the drum, and the mechanical advantage decreases as the rope is wound onto the drum and onto itself (which creates a larger effective outer diameter of the drum).
Thus, the outer diameter of the drum of the winch in part determines the initial mechanical advantage the winch provides when initially lifting (or lowering or pulling) an object. That is, the outer diameter of the drum of the winch in part determines how difficult it is to initially turn the crank arm to lift (or lower or pull) the object and how many turns of the crank arm it takes to lift (or lower) the object to a desired height (or to pull the object the desired distance). A winch providing a low initial mechanical advantage makes it more difficult to initially turn the crank arm to lift (or lower or pull) the object, but lifts (or lowers) the object to the desired height (or pulls the object the desired distance) after a relatively small number of turns of the crank arm. Conversely, a winch providing a high initial mechanical advantage makes it easier to initially turn the crank arm to lift (or lower or pull) the object, but lifts (or lowers) the object to the desired height (or pulls the object the desired distance) after a relatively large number of turns of the crank arm.
Conventional winches have drums having fixed or non-variable outer diameters and, therefore, such conventional winches have fixed or non-variable initial mechanical advantages. This can be frustrating for certain users. For instance, for a given winch, one user may prefer a higher initial mechanical advantage than the winch currently provides because the user desires to lift the object to the desired height in as few turns of the crank arm as possible. On the other hand, another user may prefer a lower initial mechanical advantage than the winch currently provides because the user finds it too difficult to turn the crank arm. Thus, there is a need for a new and improved winch having an adjustable or variable mechanical advantage that solves these problems.
Various embodiments of the present disclosure provide a winch having a user-adjustable or variable initial mechanical advantage. In one embodiment, the winch of the present disclosure has an outer drum diameter that is adjustable or variable by a user between: (a) a minimum outer drum diameter, which is associated with a maximum initial mechanical advantage provided by the winch; and (b) a maximum outer drum diameter, which is associated with a minimum initial mechanical advantage provided by the winch. Generally, as the initial mechanical advantage provided by the winch increases, the difficulty of initially turning the crank arm of the winch to lift an object decreases, but the number of turns of the crank arm required to lift the object to a desired height increases. Thus, when the outer drum diameter of the winch is set to the minimum outer drum diameter, the crank arm is relatively easy to initially turn to lift the object and must be turned a relatively large number of times to lift the object to the desired height. Conversely, when the outer drum diameter of the winch is set to the maximum outer drum diameter, the crank arm is relatively difficult to initially turn to lift the object and must be turned a relatively small number of times to lift the object to the desired height.
The winch of the present disclosure solves the above-described problems by providing the user with the flexibility to adjust or vary the initial mechanical advantage of the winch to the user's preference based on, for example, the mass of the object to be lifted and the user's strength.
The winch of the present disclosure can be used in various different applications or mechanical apparatuses. For example, the winch of the present disclosure may be used to lift objects, to lower objects, or to pull objects, in certain instances in conjunction with a pulley system. The winch may be attached to a wall stud, a boat trailer, a truck, the deck of a boat, and any other suitable surface.
Additional features and advantages of the present disclosure are described in, and will be apparent from, the following Detailed Description and the Figures.
Various embodiments of the present disclosure provide a winch having a user-adjustable or variable initial mechanical advantage. In one embodiment, the winch of the present disclosure has an outer drum diameter that is adjustable or variable by a user between: (a) a minimum outer drum diameter, which is associated with a maximum initial mechanical advantage provided by the winch; and (b) a maximum outer drum diameter, which is associated with a minimum initial mechanical advantage provided by the winch. Generally, as the initial mechanical advantage provided by the winch increases, the difficulty of initially turning the crank arm of the winch to lift an object decreases, but the number of turns of the crank arm required to lift the object to a desired height increases. Thus, when the outer drum diameter of the winch is set to the minimum outer drum diameter, the crank arm is relatively easy to initially turn to lift the object and must be turned a relatively large number of times to lift the object to the desired height. Conversely, when the outer drum diameter of the winch is set to the maximum outer drum diameter, the crank arm is relatively difficult to initially turn to lift the object and must be turned a relatively small number of times to lift the object to the desired height.
Referring now to the drawings,
The winch 10 includes the following components, each of which is described in further detail below: (a) a frame 100 to which various components of the winch 10 are mounted (either directly or indirectly); (b) a center shaft 200 fixedly mounted to the frame 100; (c) a center sleeve 300 rotatably mounted or journaled around the center shaft 200; (d) a driven gear 400 fixedly mounted to the center sleeve 300 proximate a left end of the center sleeve 300; (e) a front plate 500 fixedly mounted to the center sleeve 300 proximate a right end of the center sleeve 300; (f) a partition 600 fixedly mounted to the center sleeve 300 substantially at a point along the center of the length of the center sleeve 300 between the driven gear 400 and the front plate 500; (g) a front adjustment plate 1700 rotatably and slidably mounted to the center sleeve 300 between the front plate 500 and the partition 600; (h) a rear adjustment plate 700 rotatably and slidably mounted to the center sleeve 300 between the driven gear 400 and the partition 600; (i) a rear compression spring 800 rotatably and slidably mounted to the center sleeve 300 between the rear adjustment plate 700 and the partition 600; (j) a front compression spring 1800 rotatably and slidably mounted to the center sleeve 300 between the front adjustment plate 1700 and the partition 600; (k) a plurality of adjustment pins 900, each of which is mounted within and spans aligned portions of a set of corresponding adjustment slots of the front plate 500, the front adjustment plate 1700, the partition 600, the rear adjustment plate 700, and the driven gear 400; (l) a drive shaft 1100 rotatably mounted to the frame 100; (m) a drive gear 1000 fixedly mounted to the drive shaft 1100; (n) a crank arm 1200 connected to the drive shaft 1100; (o) a handle 1300 connected to the crank arm 1200; and (p) a lock lever 1400 rotatably mounted to the frame 100.
As illustrated in
The base 110 defines a first set of frame mounting openings 112a, 112b, 112c, and 112d therethrough, which may be used to mount the frame 100 (and the winch 10) to a suitable surface, such as a stud or a wall surface (such as drywall) mounted to the stud. The right side wall 120 defines a drive shaft receiving opening 122 and a center shaft receiving opening 124 therethrough. The left side wall defines: (a) a drive shaft receiving opening 132; (b) a center shaft receiving opening 134; (c) a second set of frame mounting openings 136a, 136b, 136c, and 136d; and (d) a lock lever mounting opening 138 therethrough. The drive shaft receiving opening 122 of the right side wall 120 and the drive shaft receiving opening 132 of the left side wall 130 are aligned, and are configured to receive the drive shaft 1100. Similarly, the center shaft receiving opening 124 of the right side wall 120 and the center shaft receiving opening 134 of the left side wall 130 are aligned, and are configured to receive the center shaft 200. The second set of frame mounting openings 136a, 136b, 136c, and 136d may be used instead of or in addition to the first set of frame mounting openings 112a, 112b, 112c, and 112d to mount the frame 100 (and the winch 10) to a suitable surface. The lock lever mounting opening 138 is used to rotatably mount the lock lever 1400 to the frame 100, as described below.
As illustrated in
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As illustrated in
The center sleeve receiving opening 424 has a diameter greater than the diameter D1 and less than the diameter D2, and is configured to receive the center sleeve 300 such that the driven gear 400 may be fixedly mounted to the center sleeve 300 along the driven gear mounting surface 320.
When viewed facing the front surface 410a (as in
As described below, each adjustment slot 440 is configured to receive one of the adjustment pins 900, and facilitates the adjustment of the radial location of that adjustment pin 900 (i.e., facilitates the adjustment of the outer drum diameter of the winch 10). In this example embodiment, each adjustment slot 440 includes an inner pin holding area proximate the inner end of the adjustment slot 440 located at the radial distance R1 from the center of the driven gear 400, an outer pin holding area proximate the outer end of the adjustment slot 440 located at the radial distance R2 from the center of the driven gear 400, and a pin movement area spanning the inner and outer pin holding areas along which the adjustment pin 900 may move to adjust the radial location of the adjustment pin from the inner pin holding area to the outer pin holding area (or vice-versa). As described in detail below, in this example embodiment, the orientation of the adjustment slots of the driven gear 400, the rear adjustment plate 700, the partition 600, the front adjustment plate 1700, and the front plate 500 enable the adjustment pin 900 to be held in place at the inner pin holding area or the outer pin holding area (i.e., held such that the radial distance from the center of the center sleeve does not substantially change).
Each locking tab receiving opening 450 is centered at the radial distance R2 from the center of the driven gear 400. Locking tab receiving opening 450a is centered between the outer pin holding areas of adjustment slots 440a and 440b, locking tab receiving opening 450b is centered between the outer pin holding areas of adjustment slots 440b and 440c, locking tab receiving opening 450c is centered between the outer pin holding areas of adjustment slots 440c and 440d, and locking tab receiving opening 450d is centered between the outer pin holding areas of adjustment slots 440d and 440a. Each locking tab receiving opening 450 is configured to receive a locking tab 750 of the rear adjustment plate 700, as described below.
As illustrated in
The center sleeve receiving opening 524 has a diameter greater than the diameter D1 and less than the diameter D2, and is configured to receive the center sleeve 300 such that the front plate 500 may be fixedly mounted to the center sleeve 300 along the front plate mounting surface 330.
The adjustment slots 540 are substantially identical to the adjustment slots 440 of the driven gear 400. That is, when viewed from the front surface 510a (as in
As described below, each adjustment slot 540 is configured to receive one of the adjustment pins 900, and facilitates the adjustment of the radial location of that adjustment pin 900 (i.e., facilitates the adjustment of the outer drum diameter of the winch 10). In this example embodiment, each adjustment slot 540 includes an inner pin holding area proximate the inner end of the adjustment slot 540 located at the radial distance R1 from the center of the front plate 500, an outer pin holding area proximate the outer end of the adjustment slot 540 located at the radial distance R2 from the center of the front plate 500, and a pin movement area spanning the inner and outer pin holding areas along which the adjustment pin 900 may move to adjust the radial location of the adjustment pin from the inner pin holding area to the outer pin holding area (or vice-versa). As described in detail below, in this example embodiment, the orientation of the adjustment slots of the driven gear 400, the rear adjustment plate 700, the partition 600, the front adjustment plate 1700, and the front plate 500 enable the adjustment pin 900 to be held in place at the inner pin holding area or the outer pin holding area (i.e., held such that the radial distance from the center of the center sleeve does not substantially change).
The locking tab receiving openings 550 are substantially identical to the locking tab receiving openings 450 of the driven gear 400. That is, each locking tab receiving opening 550 is centered at the radial distance R2 from the center of the front plate 500. Locking tab receiving opening 550a is centered between the outer pin holding areas of adjustment slots 540a and 540b, locking tab receiving opening 550b is centered between the outer pin holding areas of adjustment slots 540b and 540c, locking tab receiving opening 550c is centered between the outer pin holding areas of adjustment slots 540c and 540d, and locking tab receiving opening 550d is centered between the outer pin holding areas of adjustment slots 540d and 540a. Each locking tab receiving opening 550 is configured to receive a locking tab 1750 of the front adjustment plate 1700, as described below.
As illustrated in
The center sleeve receiving opening 624 is configured to receive the center sleeve 300 such that the partition 600 may be fixedly mounted to the center sleeve 300 along the component mounting surface 310.
The adjustment slots 640 are substantially identical to the adjustment slots 440 of the driven gear 400 and the adjustment slots 540 of the front plate 500. That is, when viewed from the front surface 610a (as in
As described below, each adjustment slot 640 is configured to receive one of the adjustment pins 900, and facilitates the adjustment of the radial location of that adjustment pin 900 (i.e., facilitates the adjustment of the outer drum diameter of the winch 10). In this example embodiment, each adjustment slot 640 includes an inner pin holding area proximate the inner end of the adjustment slot 640 located at the radial distance R1 from the center of the partition 600, an outer pin holding area proximate the outer end of the adjustment slot 640 located at the radial distance R2 from the center of the partition 600, and a pin movement area spanning the inner and outer pin holding areas along which the adjustment pin 900 may move to adjust the radial location of the adjustment pin from the inner pin holding area to the outer pin holding area (or vice-versa). As described in detail below, in this example embodiment, the orientation of the adjustment slots of the driven gear 400, the rear adjustment plate 700, the partition 600, the front adjustment plate 1700, and the front plate 500 enable the adjustment pin 900 to be held in place at the inner pin holding area or the outer pin holding area (i.e., held such that the radial distance from the center of the center sleeve does not substantially change).
As illustrated in
The mounting sleeve 720 includes an outer surface 722 and an inner surface 724. The inner surface 724 has a diameter approximately equal to that of the center sleeve receiving opening of the body 710. The inner surface 724 of the mounting sleeve 720 and the center sleeve receiving opening defined by the body 710 together define a generally cylindrical center sleeve receiving channel through the rear adjustment plate 700. The center sleeve receiving channel of the rear adjustment plate 700 is configured to receive the center sleeve, as described below.
The adjustment slots 740 are substantially identical in size and shape to the adjustment slots 440 of the driven gear 400, the adjustment slots 540 of the front plate 500, and the adjustment slots 640 of the partition 600. However, the adjustment slots 740 have orientations opposite of the orientations of the corresponding adjustment slots 440, 540, and 640. More specifically, when viewed from the front surface 710a (as in
As described below, each adjustment slot 740 is configured to receive one of the adjustment pins 900, and facilitates the adjustment of the radial location of that adjustment pin 900 (i.e., facilitates the adjustment of the outer drum diameter of the winch 10). In this example embodiment, each adjustment slot 740 includes an inner pin holding area proximate the inner end of the adjustment slot 740 located at the radial distance R1 from the center of the rear adjustment plate 700, an outer pin holding area proximate the outer end of the adjustment slot 740 located at the radial distance R2 from the center of the rear adjustment plate 700, and a pin movement area spanning the inner and outer pin holding areas along which the adjustment pin 900 may move to adjust the radial location of the adjustment pin from the inner pin holding area to the outer pin holding area (or vice-versa). As described in detail below, in this example embodiment, the orientation of the adjustment slots of the driven gear 400, the rear adjustment plate 700, the partition 600, the front adjustment plate 1700, and the front plate 500 enable the adjustment pin 900 to be held in place at the inner pin holding area or the outer pin holding area (i.e., held such that the radial distance from the center of the center sleeve does not substantially change).
The rear adjustment plate 700 also includes two circumferentially spaced locking tabs 750a and 750b extending transversely from the back surface of the base 710. Each locking tab 750 is centered at the radial distance R2 from the center of the base 710. Locking tab 750a is centered between adjustment slots 740b and 740c, and locking tab 750b is centered between adjustment slots 740d and 740a.
As best illustrated in
As described below, each adjustment slot 1740 is configured to receive one of the adjustment pins 900, and facilitates the adjustment of the radial location of that adjustment pin 900 (i.e., facilitates the adjustment of the outer drum diameter of the winch 10). In this example embodiment, each adjustment slot 1740 includes an inner pin holding area proximate the inner end of the adjustment slot 1740 located at the radial distance R1 from the center of the front adjustment plate 1700, an outer pin holding area proximate the outer end of the adjustment slot 1740 located at the radial distance R2 from the center of the front adjustment plate 1700, and a pin movement area spanning the inner and outer pin holding areas along which the adjustment pin 900 may move to adjust the radial location of the adjustment pin from the inner pin holding area to the outer pin holding area (or vice-versa). As described in detail below, in this example embodiment, the orientation of the adjustment slots of the driven gear 400, the rear adjustment plate 700, the partition 600, the front adjustment plate 1700, and the front plate 500 enable the adjustment pin 900 to be held in place at the inner pin holding area or the outer pin holding area (i.e., held such that the radial distance from the center of the center sleeve does not substantially change).
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In this example embodiment: (a) the frame 100 is made of sheet metal, (b) the center shaft 200 is made of hardened steel, (c) the center sleeve 300 is made of steel, (d) the driven gear 400 is made of stamped steel, (e) the front plate 500 is made of stamped steel, (f) the partition 600 is made of stamped steel, (g) the rear adjustment plate 700 is made of steel, (h) the front adjustment plate 1700 is made of steel, (h) the front and rear compression springs 800 and 1800 are made of spring steel, (i) the adjustment pins 900 are made of steel, (j) the drive gear 1000 is made of steel, (k) the drive shaft 1100 is made of hardened steel, (l) the crank arm 1200 is made of stamped steel, (m) the handle 1300 is made of plastic, and (n) the lock lever 1400 is made of stamped steel.
It should be appreciated, however, that such components may be made of any suitable materials, such as (but not limited to) stainless steel, aluminum, brass, copper, bronze, tin, nickel, titanium, and rubber.
It should be also be appreciated that the above-described components of the winch may be made in different shapes or sizes to accommodate various different uses and different desired initial mechanical advantages.
To assemble the winch 10, the driven gear 400, the rear adjustment plate 700, the rear compression spring 800, the partition 600, the front compression spring 1800, the front adjustment plate 1700, and the front plate 500 are first mounted to the center sleeve 300.
More specifically, the left end of the center sleeve 300 including the driven gear mounting surface 320 is slid through the center sleeve receiving opening 424 of the driven gear 400 until the front surface 410a of the driven gear 400 abuts the drive gear constraining surface 315 of the center sleeve 300. The driven gear 400 is then fixedly attached to the center sleeve 300 (using any suitable fasteners) such that the driven gear 400 may not rotate or slide relative to the center sleeve 300.
The rear adjustment plate 700 is slid over the center sleeve 300 via the center sleeve receiving channel and manipulated (e.g., rotated and or slid relative to the center shaft 300) until: (a) the locking tabs 750a and 750b of the rear adjustment plate 700 are received by two of the locking tab receiving openings 450a, 450b, 450c, and 450d of the driven gear 400; and (b) the back surface of the rear adjustment plate 700 abuts the front surface 410a of the driven gear 400.
The rear compression spring 800 is slid over the center sleeve 300 and the mounting sleeve 720 of the rear adjustment plate 700 until one end of the rear compression spring 800 abuts the front surface 710a of the rear adjustment plate 700.
The partition 600 is slid, back surface first, over the center sleeve 300 via the center sleeve receiving opening 624 until the back surface of the partition 600 abuts the other end of the rear compression spring 800. The partition 600 is then manipulated (e.g., rotated or slid relative to the center sleeve 300) and fixedly attached to the center sleeve 300 substantially at a point along the center of the length of the center sleeve 300 such that: (a) the adjustment slot 640a of the partition 600 aligns with the adjustment slot 440a of the driven gear 400, (b) the adjustment slot 640b of the partition 600 aligns with the adjustment slot 440b of the driven gear 400, (c) the adjustment slot 640c of the partition 600 aligns with the adjustment slot 440c of the driven gear 400, (d) the adjustment slot 640d of the partition 600 aligns with the adjustment slot 440d of the driven gear 400, and (e) the partition 600 does not rotate or slide relative to the center sleeve 300. It should be appreciated that, after the partition 600 is fixedly attached to the center sleeve 300, the rear compression spring 800 is slightly compressed between the partition 600 and the rear adjustment plate 700 such that the rear compression spring 800 forces the rear adjustment plate 700 to maintain contact with the driven gear 400.
The front compression spring 1800 is slid over the center sleeve 300 until one end of the front compression spring 1800 abuts the front surface 610a of the partition 600.
The front adjustment plate 1700 is slid, front surface 1710a first, over the center sleeve 300 via the center sleeve receiving channel until the front surface 1710a of the front adjustment plate 1700 abuts the other end of the front compression spring 1800. It should be appreciated that the mounting sleeve 1720 of the front adjustment plate 1700 is disposed between the center sleeve 300 and the front compression spring 1800. The front adjustment plate 1700 is manipulated (e.g., rotated and/or slid relative to the center sleeve 300) such that: (a) the adjustment slot 1700a of the front adjustment plate 1700 aligns with the adjustment slot 700a of the rear adjustment plate 700; (b) the adjustment slot 1700b of the front adjustment plate 1700 aligns with the adjustment slot 700b of the rear adjustment plate 700; (c) the adjustment slot 1700c of the front adjustment plate 1700 aligns with the adjustment slot 700c of the rear adjustment plate 700; and (d) the adjustment slot 1700d of the front adjustment plate 1700 aligns with the adjustment slot 700d of the rear adjustment plate 700.
The front plate 500 is slid, back side first, over the center sleeve 300 via the center sleeve receiving opening 524 and manipulated (e.g., rotated and/or slid relative to the center sleeve 300) until: (a) the adjustment slot 540a of the front plate 500 aligns with the adjustment slot 640a of the partition 600 and the adjustment slot 440a of the driven gear 400; (b) the adjustment slot 540b of the front plate 500 aligns with the adjustment slot 640b of the partition 600 and the adjustment slot 440b of the driven gear 400; (c) the adjustment slot 540c of the front plate 500 aligns with the adjustment slot 640c of the partition 600 and the adjustment slot 440c of the driven gear 400; (d) the adjustment slot 540d of the front plate 500 aligns with the adjustment slot 640d of the partition 600 and the adjustment slot 440d of the driven gear 400; (e) the locking tabs 1750a and 1750b of the front adjustment plate 1700 are received by two of the locking tab receiving openings 550a, 550b, 550c, and 550d of the front plate 500; (f) the back surface of the front plate 500 abuts the back surface of the front adjustment plate 1700; and (g) the back surface of the front plate 500 abuts the front plate constraining surface 325 of the center sleeve 300. The front plate 500 is then fixedly attached to the center sleeve 300 such that the front plate 500 does not rotate or slide relative to the center sleeve 300. It should be appreciated that, after the front plate 500 is fixedly attached to the center sleeve 300, the front compression spring 1800 is slightly compressed between the partition 600 and the front adjustment plate 1700 such that the front compression spring 1800 forces the front adjustment plate 1700 to maintain contact with the front plate 500.
After the above components are mounted to the center sleeve 300: (a) at least a portion of each of a first set of corresponding adjustment slots 440a, 540a, 640a, 740a, and 1740a align with one another (such as at their respective inner pin holding areas or their respective outer pin holding areas), (b) at least a portion of each of a second set of corresponding adjustment slots 440b, 540b, 640b, 740b, and 1740b align with one another (such as at their respective inner pin holding areas or their respective outer pin holding areas), (c) at least a portion of each of a third set of corresponding adjustment slots 440c, 540c, 640c, 740c, and 1740c align with one another (such as at their respective inner pin holding areas or their respective outer pin holding areas); and (d) at least a portion of each of a fourth set of corresponding adjustment slots 440d, 540d. 640d, 740d, and 1740d align with one another (such as at their respective inner pin holding areas or their respective outer pin holding areas).
The radial distance from the center of the center sleeve 300 at which the portions of the respective sets of adjustment slots align (e.g., whether they align at their respective inner pin holding areas located at the radial distance R1 from the center of the center sleeve 300 or their respective outer pin holding areas located at the radial distance R2 from the center of the center sleeve 300) depends on the rotational orientation of the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500. The rotational orientation of the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500 depends on which locking tab receiving openings 450 and 550 of the driven reel 400 and the front plate 500, respectively, receive the locking tabs 750 and 1750 of the rear and front adjustment plates 700 and 1700, respectively.
More specifically, in this example embodiment, if the rear and front adjustment plates 700 and 1700 have a first rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500 (e.g., the locking tab 750a is received in the locking tab receiving opening 450a, the locking tab 750b is received in the locking tab receiving opening 450c, the locking tab 1750a is received in the locking tab receiving opening 550a, and the locking tab 1750b is received in the locking tab receiving opening 550c), the respective sets of adjustment slots align at their respective inner pin holding areas (i.e., substantially at the radial distance R1 from the center of the center sleeve 300). If the rear and front adjustment plates 700 and 1700 have a second rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500 (e.g., the locking tab 750a is received in the locking tab receiving opening 450b, the locking tab 750b is received in the locking tab receiving opening 450d, the locking tab 1750a is received in the locking tab receiving opening 550b, and the locking tab 1750b is received in the locking tab receiving opening 550d), the respective sets of adjustment slots align at their respective outer pin holding areas (i.e., substantially at the radial distance R2 from the center of the center sleeve 300).
The adjustment pin 900a is inserted through the aligned portions of the adjustment slots 540a, 1740a, 640a, 740a, and 440a of the first set of adjustment slots (such that an axis along the length of the adjustment pin 900a is substantially parallel to an axis along the length of the center sleeve 300) until the inner surface of the head 920a of the adjustment pin 900a abuts the front surface 510a of the front plate 500, and is then fastened at the fastening end 930 (using any suitable fasteners) such that the adjustment pin 900a does not substantially slide relative to the front plate 500, the front adjustment plate 1700, the partition 600, the rear adjustment plate 700, and the driven gear 400. This is repeated for adjustment pin 900b with respect to the adjustment slots 540b, 1740b, 640b, 740b, and 440b of the second set of adjustment slots; adjustment pin 900c with respect to the adjustment slots 540c, 1740c, 640c, 740c, and 440c of the third set of adjustment slots; and adjustment pin 900d with respect to the adjustment slots 540d, 1740d, 640d, 740d, and 440d of the fourth set of adjustment slots. Once installed, the axes along the lengths of the adjustment pins 900 are substantially parallel to one another and to the axis along the length of the center sleeve 300.
It should be appreciated that, after the above components are mounted to the center sleeve 300: (a) the driven gear 400, the partition 600, and the front plate 500 may not rotate or slide relative to the center sleeve 300; (b) the front adjustment plate 1700 is configured to slide relative to the center sleeve 300 toward and away from the partition 600, subject to the constraints of the front compression spring 1800; (c) the front adjustment plate 1700 is configured to rotate relative to the center sleeve 300 when slid toward the partition 600 such that the locking tabs 1750 are no longer received in the locking tab receiving openings 550 of the front plate 500, subject to the constraints of the adjustment pins 900; (d) the rear adjustment plate 700 is configured to slide relative to the center sleeve 300 toward and away from the partition 600, subject to the constraints of the rear compression spring 800; and (e) the rear adjustment plate 700 is configured to rotate relative to the center sleeve 300 when slid toward the partition 600 such that the locking tabs 750 are no longer received in the locking tab receiving openings 450 of the driven gear 400, subject to the constraints of the adjustment pins 900.
It should also be appreciated that the orientations of the adjustment slots 440, 540, 640, 740, and 1740 relative to one another cause the four adjustment pins 900 to be positioned at substantially the same radial distance from the center of the center sleeve 300. As described in detail below, a user may adjust the radial distance of the adjustment pins 900 from the center of the center sleeve 300 (e.g., whether the adjustment pins 900 are held at the inner pin holding areas of the adjustment slots or the outer pin holding areas of the adjustment slots) by rotating the front and rear adjustment plates 700 and 1700 relative to the center sleeve 300.
In this example embodiment, the four alignment pins represent the drum around which a plurality of flexible members (such as straps, ropes, chains, cords, cables, webbing, and the like) wrap (or from which the flexible members unwrap) when the crank arm is turned. Here, the furthest distance between the outer surfaces of two opposing adjustment pins (e.g., adjustment pins 900a and 900c or adjustment pins 900b and 900d) represents the outer drum diameter of the winch 10.
The center sleeve 300 is then positioned between the center shaft receiving openings 124 and 134 of the frame 100, and the center shaft 200 is inserted through the center shaft receiving opening 124, through the center shaft receiving channel of the center sleeve 300, and through the center shaft receiving opening 134. The center shaft is then fixedly mounted to the frame 100 (using any suitable fasteners) such that the center shaft does not rotate or slide relative to the frame 100.
The drive gear 1000 is positioned such that the teeth 1001 of the drive gear 1000 mesh with the teeth 401 of the driven gear 400. The drive shaft 1100 is then inserted through the drive shaft receiving opening 124, through the drive shaft receiving opening 1024 of the drive gear 1000, and through the drive shaft receiving opening 134 of the frame 100. The drive gear 1000 is fixedly mounted to the drive shaft 1100 such that the drive gear 1000 does not rotate or slide relative to the drive shaft 1100. The drive shaft 1100 is rotatably mounted to the frame 100 such that the drive shaft may rotate relative to the frame 100.
The crank arm 1200 is attached to the drive shaft 1100 via the drive shaft receiving opening 1232 and any suitable fasteners. The handle 1300 is attached to the crank arm 1200 via then handle fastener receiving opening 1212 and any suitable fasteners.
The lock lever 1400 is rotatably mounted to the lock lever mounting opening 138 of the frame 100 such that the lock lever may rotate relative to the frame 100. The lock lever 1400 is mounted such that the locking tooth 1430 is biased against and meshes with the teeth 1001 of the drive gear 1000. The configuration of the lock lever 1400 prevents the drive gear 1000 from rotating in a certain direction (counter-clockwise, in this example embodiment) unless the release tab 1440 is used to disengage the locking tooth 1430 from the teeth 1001 of the drive gear 1000.
After assembly, the winch is attached to a suitable surface (such as a wall stud) using any suitable fasteners via the a first set of frame mounting openings 112a, 112b, 112c, and 112d and/or the second set of frame mounting openings 136a, 136b, 136c, and 136d of the frame 100.
In this example embodiment, though not shown, two flexible members, such as straps, are configured to be attached to one of the adjustment pins (at different locations along the length of the adjustment pin). More specifically, a first strap is configured to be attached to one of the adjustment pins between a portion of the adjustment pin located between the partition and the rear adjustment plate, and a second strap is configured to be attached to a portion of the adjustment pin located between the partition and the front adjustment plate. Here, the partition separates the two straps. Thus, in this example embodiment, when the crank arm is turned to wind up the straps, the first strap winds around the portions of the adjustment pins located between the partition and the rear adjustment plate, and the second strap winds around the portions of the adjustment pins located between the partition and the front adjustment plate. The partition thus prevents the straps from interfering with one another during operation of the winch.
In other embodiments, the winch is employed with a single flexible member. In one such embodiment, the winch does not employ a partition. In further embodiments, the winch is employed with more than two flexible members. For instance, in one example embodiment, the winch is employed with three flexible members, and includes two partitions between the rear adjustment plate and the front adjustment plate to separate the flexible members.
In the above example embodiment, the driven gear, the rear adjustment plate, the partition, the front adjustment plate, and the front plate each include four adjustment slots and, therefore, the winch employs four adjustment pins. It should be appreciated that, in other embodiments, the driven gear, the rear adjustment plate, the partition, the front adjustment plate, and the front plate include more than (such as six, eight, or any suitable quantity) or fewer than (such as two, three, or any suitable quantity) four adjustment slots such that the winch employs more or fewer adjustment pins.
In the above example embodiment, the winch is a manual winch. It should be appreciated that the present disclosure contemplates employing the winch of the present disclosure as an electric winch, a gas-powered winch, or any other suitable type of winch.
As noted above, the radial distance from the center of the center sleeve 300 at which the portions of the respective sets of adjustment slots align and, therefore, the radial distance from the center of the center sleeve 300 at which the adjustment pins 900 inserted through those adjustment slots are positioned, depends on the rotational orientation of the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500. Since the furthest distance between the outer surfaces of two opposing adjustment pins represents the outer diameter of the drum of the winch 10, which in part determines the initial mechanical advantage provided by the winch 10, the rotational orientation of the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500 in part determines the initial mechanical advantage provided by the winch 10.
As noted above, when the rear and front adjustment plates 700 and 1700 have the first rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500 (e.g., the locking tab 750a is received in the locking tab receiving opening 450a, the locking tab 750b is received in the locking tab receiving opening 450c, the locking tab 1750a is received in the locking tab receiving opening 550a, and the locking tab 1750b is received in the locking tab receiving opening 550c), the aligned portions of the respective sets of adjustment slots and, therefore, the adjustment pins 900, are located at the inner pin holding areas located substantially at the radial distance R1 from the center of the center sleeve 300. This first rotational orientation results in the smallest outer drum diameter of the winch 10 and, therefore, results in the winch 10 providing the maximum initial mechanical advantage.
When the rear and front adjustment plates 700 and 1700 have the second rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500 (e.g., the locking tab 750a is received in the locking tab receiving opening 450b, the locking tab 750b is received in the locking tab receiving opening 450d, the locking tab 1750a is received in the locking tab receiving opening 550b, and the locking tab 1750b is received in the locking tab receiving opening 550d), the aligned portions of the respective sets of adjustment slots and, therefore, the adjustment pins 900, are located at the outer pin holding areas located substantially the radial distance R2 from the center of the center sleeve 300. This second rotational orientation results in the largest outer drum diameter of the winch 10 and, therefore, results in the winch 10 providing the minimum initial mechanical advantage.
To adjust the initial mechanical advantage of the winch 10, the user must, therefore, adjust the rotational orientation of the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500.
For example, to adjust the initial mechanical advantage of the winch 10 from the minimum initial mechanical advantage (i.e., the adjustment pins 900 located substantially at the radial distance R2 from the center of the center sleeve 300) at to the maximum initial mechanical advantage (i.e., the adjustment pins 900 located substantially at the radial distance R1 from the center of the center sleeve 300), the user pushes the first and second adjustment plates 700 and 1700 toward one another, further compressing the rear compression spring 800 between the rear adjustment plate 700 and the partition 600 and the front compression spring 1800 between the front adjustment plate 1700 and the partition 600, until the locking tabs 750 are no longer received in the locking tab receiving openings 450 and the locking tabs 1750 are no longer received in the locking tab receiving openings 550.
At this point, the user may rotate the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500. The user rotates the rear and front adjustment plates 700 and 1700 clockwise (as viewed from the front surface of the rear adjustment plate 700 and the back surface of the front adjustment plate 1700) until they are in the second rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500. This rotation causes the adjustment pins 900 to move through the pin movement areas of the adjustment sleeves radially inward until they are located at the inner pin holding areas located substantially at the radial distance R1 from the center of the center sleeve 300.
Conversely, to adjust the initial mechanical advantage of the winch 10 from the maximum initial mechanical advantage to the minimum initial mechanical advantage, the user pushes the first and second adjustment plates 700 and 1700 toward one another, further compressing the rear compression spring 800 between the rear adjustment plate 700 and the partition 600 and the front compression spring 1800 between the front adjustment plate 1700 and the partition 600, until the locking tabs 750 are no longer received in the locking tab receiving openings 450 and the locking tabs 1750 are no longer received in the locking tab receiving openings 550.
At this point, the user may rotate the rear and front adjustment plates 700 and 1700 with respect to the driven gear 400, the partition 600, and the front plate 500. The user rotates the rear and front adjustment plates 700 and 1700 counter-clockwise (as viewed from the front surface of the rear adjustment plate 700 and the back surface of the front adjustment plate 1700) until they are in the first rotational orientation with respect to the driven gear 400, the partition 600, and the front plate 500. This rotation causes the adjustment pins 900 to move through the pin movement areas of the adjustment sleeves radially outward until they are located at the outer pin holding areas located substantially at the radial distance R2 from the center of the center sleeve 300. The user then releases the rear and front adjustment plates 700 and 1700. Releasing the rear and front adjustment plates 700 and 1700 allows the rear and front compression springs 800 and 1800 to revert to their prior, semi-compressed states, thereby forcing the back surface of the rear adjustment plate 700 into contact with the front surface of the driven gear 400 (and the locking tabs 750a and 750b into the locking tab receiving openings 450a and 450c, respectively) and forcing the back surface of the front adjustment plate 1700 into contact with the back surface of the front plate 500 (and the locking tabs 1750a and 1750b into the locking tab receiving openings 550a and 550c, respectively).
It should be appreciated that the additional locking tab mounting openings may be employed such that the adjustment pins may be held at an area of the adjustment slots between the inner pin holding areas and the outer pin holding areas. In this example embodiment, the outer pin holding areas themselves may receive the locking tabs, resulting in the adjustment pins being held near the centers of the pin movement areas between the inner pin holding areas and the outer pin holding areas. This enables the user to set the initial mechanical advantage of the winch about halfway between the minimum and the maximum initial mechanical advantage. In other words, the rear and front adjustment plates and have a third rotational orientation with respect to the driven gear, the partition, and the front plate about halfway between the first and second rotational orientations described above.
It should be appreciated that the above is one example of a manner in which the outer diameter of the drum of the winch of the present disclosure may be adjusted or varied by a user, and that any other suitable manner or manners of adjusting or varying the outer diameter of the drum of the winch may be employed.
It should also be appreciated that the winch of the present disclosure may be employed in any of a variety of different manners or applications, such as for lifting, lowering, pulling, hauling, holding an object in place, and the like. For example, the winch may be installed on the deck of a ship to facilitate pulling up an anchor, raising or lowering a sail, or moving a mast. In another example, the winch may be installed on an automobile, such as a car or a truck, to facilitate pulling objects. In another example, the winch may be installed on an all-terrain vehicle, and can be used to pull the vehicle when getting stuck (such as in mud) while traveling through rugged terrain. In another example, the winch facilitates hauling a boat onto a trailer for towing. In another example, the winch may be used in industrial applications to haul heavy items in a warehouse or factory, lift items onto a scaffolding structure, or even raise and lower heavy doors or windows.
In this example embodiment, the object lifting system includes the following components: (a) a winch 2010, such as the winch having the user-adjustable or variable mechanical advantage of the present disclosure described above; (b) a strap receiver 2100; (c) a first pulley 2200a and a second pulley 2200b; (d) a first strap securer 2300a and a second strap securer 2300b; and (e) a first strap 2400a and a second strap 2400b.
As illustrated in
As illustrated in
As illustrated in
As illustrated in
To assemble the pulley 2200, as shown in
As illustrated in
In this example embodiment, to install the object lifting system: (a) the winch 2010 is mounted to a vertical wall 4000 (as described above); (b) the strap receiver 2100 is mounted to the wall 4000 (or any other suitable surface) above the winch 2010 proximate a ceiling 5000 using the strap receiver mounting openings 2112a and 2112b; (c) the first pulley 2200a is mounted to the ceiling 5000 at a first anchor point located: (i) a first distance D1 from the strap receiver 2100 measured from the center of the strap receiver 2100 along the wall 4000 to the right of the strap receiver 2100 (as shown in
In operation, as shown in
In another embodiment, as shown in
In another embodiment (not shown), the free end of each of the straps includes a hook or other attachment member. In this embodiment, the user attaches the hooks to the object to enable the winch to lift (and lower) the object.
In another embodiment, the object lifting system includes a wall cleat 2500, shown in
It should be appreciated that any suitable flexible member guide may be used in place of or in addition to the pulleys. In one embodiment, the object lifting system employs a flexible member router 2600, shown in
In another embodiment (not shown), the object lifting system employs a plurality of additional pulleys instead of the flexible member receiver. That is, in this embodiment, a first additional pulley and a second additional pulley are mounted to the ceiling and/or to the wall above the winch. In this embodiment: (a) the secured end of the first flexible member is attached to the drum of the winch, and the free end of the first flexible member is fed over the flexible member sliding surface of the first additional pulley and then over the flexible member sliding surface of the first pulley; and (b) the secured end of the second flexible member is attached to the drum of the winch, and the free end of the second flexible member is fed over the flexible member sliding surface of the second additional pulley and then over the flexible member sliding surface of the second pulley.
It should be understood that modifications and variations may be effected without departing from the scope of the novel concepts of the present disclosure, and it should be understood that this application is to be limited only by the scope of the appended claims.
This patent application claims priority to and the benefit of U.S. Provisional Patent Application No. 61/819,256, filed on May 3, 2013, the entire contents of which are incorporated herein by reference.
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| 61819256 | May 2013 | US |
