Patent Application
20220306425
The present invention relates to a fitness equipment, and more particularly to a double drawcord winding device.
A winding device is required in some fitness equipment, for example, a pull-type rowing machine is used. A conventional pull-type rowing machine is usually equipped with a winding device. The winding device has a pull cord connected to a pull rod. When the pull rod is pulled, the pull cord is pulled out. When the pull cord is pulled out, the winding device rotates and a coil spring in the winding device is tightened. The rotation of the winding device also drives a rotating plate to rotate, and the rotating plate is linked with a damping wheel, so that the damping wheel also rotates to damp the user's pull on the pull rod. When the user releases the pull rod, the coil spring is reset, and the winding device rotates in an opposite direction to receive the pull cord. During the process of pulling and returning, the user cooperates with a sliding of a bottom seat of the conventional pull-type rowing machine to form an action that mimics rowing. The winding device in the prior art is usually a single winding structure, that is, there is only one pull cord, which causes limitations in use.
Then a conventional double drawcord winding device is disclosed in CN209828077U, the conventional double drawcord winding device has two winding devices disposed on a webbing wheel shaft respectively by two bearings to rotate around the webbing wheel shaft in two directions and return by two coil springs. Each winding device has a pull cord wound around thereof and a shaft sleeve securely mounted around a corresponding one-way bearing. A belt pulley is disposed between the shaft sleeves of the winding devices and has a shaft sleeve securely disposed in the one-way bearings. In this way, the rotations of the two winding devices can drive the belt pulley to unidirectional rotate, and a belt of the belt pulley drives a motion load.
The flaw of the above conventional double drawcord winding device is that:
The shaft sleeve of the belt pulley is mounted on the webbing wheel shaft and is not in contact with the webbing wheel shaft, so the shaft sleeve of the belt pulley can also rotate. However, the belt pulley is the main forced structure, when the motion load applied to the belt pulley is large or unstable, the belt pulley and its shaft sleeve are likely to be displaced due to the force, causing an inner wall of the shaft sleeve of the belt pulley to contact the webbing wheel shaft during movement, resulting in friction, resulting in additional movement resistance, and the shaft sleeve and the webbing wheel shaft may be damaged by collision and scratches, affecting the life of the equipment.
In addition, since the structures of the two winding devices on both sides must be the same, the belt pulley must be disposed in the middle of the two winding devices, that is, the distances from the belt pulley to the two winding devices on both sides are the same. Thus the belt pulley may be restricted to use on fitness equipment of different constructions.
In order to overcome the aforementioned shortcomings of the conventional double drawcord winding device, the present invention is provided a double drawcord winding device that can make the structure of the double winding devices more stable, can increase the service life, and can adapt to fitness equipment of different structures.
The technical solution adopted by the present invention to solve the technical problem is as follows:
The double drawcord winding device of the present invention, characterized in that:
Each one of the winding devices has an annular groove, and a pull cord is disposed in the annular groove of each one of the winding devices and has an end securely connected to the corresponding winding device.
Each pull cord is closer to the belt pulley than the coil spring of the winding device.
The belt pulley is disposed farther from one of the two winding devices and closer to the other one of the two winding devices.
One of the locating sleeves is formed with the webbing wheel shaft by welding, casting or engaging, the other one of the locating sleeves is mounted around the webbing wheel shaft and has an anti-rotation surface, the webbing wheel shaft has an anti-rotation surface engaging with the anti-rotation surface of the locating sleeve that is mounted around the webbing wheel shaft, and a limit circlip is sleeved on the webbing wheel shaft and is held the locating sleeve that has the anti-rotation surface.
The benefits of the present invention are:
In the present invention, the shaft sleeve of the belt pulley is securely mounted around the one-way bearings that are disposed on the two sides of the belt pulley bearing, and the shaft sleeves of the two winding devices on the two sides of the belt pulley are respectively disposed in the two one-way bearings. That is, a space is formed between the shaft sleeve of the belt pulley and the webbing wheel shaft for disposing the belt pulley bearing. The belt pulley is supported by the belt pulley belt to mount on the webbing wheel shaft to make the structure of the double winding devices more stable, to improve the structural strength, and to avoid the inner wall of the shaft sleeve of the belt pulley contacting the webbing pulley shaft during movement. Then the service life of the equipment can be increased. In addition, the above structure can adjust the position of the belt pulley shaft relative to the belt pulley, so that the distances between the belt pulley and the winding devices on both sides are not equal, which can be applied to more structured fitness equipment, such as fitness equipments with different distances between the belt and the webbings on both sides.
The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are very important in the art. For those skilled in the art, other embodiments can also be obtained according to these drawings without any creative effort. In order to facilitate the understanding of the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.
It should be noted that when an element is referred to as being “fixed to” another element, it can be directly on the other element, or one or more intervening elements may be present therebetween. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms “upper”, “lower”, “inner”, “outer”, “bottom”, etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention. The present invention and simplified description, rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, should not be construed as a limitation of the present invention. Furthermore, the terms “first”, “second”, “third”, etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.
As shown in
A webbing wheel shaft 2 has a belt pulley bearing 9 mounted around thereof at a middle part of the webbing wheel shaft 2.
A belt pulley 8 has a second shaft sleeve 81 securely mounted on the belt pulley 8, and the second shaft sleeve 81 has an inner hole securely mounted around an exterior of the belt pulley bearing 9. Then the belt pulley 8 is supported by the belt pulley bearing 9 to dispose on the webbing wheel shaft 2.
The belt pulley bearing 9 supports the belt pulley 8 to improve the stability and strength of the structure of the present invention, and the displacement problem of the belt pulley 8 under heavy load is fundamentally solved.
Two one-way bearings 7 are respectively disposed on two sides of the belt pulley bearing 9 and are mounted around the webbing wheel shaft 2.
The inner hole of the second shaft sleeve 81 is securely mounted around exteriors of the two one-way bearings 7.
Two winding devices 50 are respectively disposed on two sides of the belt pulley 8, and each winding device 50 has a box 5, a cover 1, a first shaft sleeve 51, a locating sleeve 21, 10, and a coil spring 3.
The cover 1 is connected to the box 5 to form a winding space.
The box 5 has a first shaft sleeve 51 extended toward the belt pulley 8, and the first shaft sleeve 51 is inserted into and mounted in one of the two one-way bearings 7. The first shaft sleeve 51 has an inner wall mounted around the webbing wheel shaft 2 without contacting with the webbing wheel shaft 2.
A winding bearing 4 is securely mounted on the webbing wheel shaft 2, and the box 5 is securely mounted around the winding bearing 4. Then the box 5 is disposed on the webbing wheel shaft 2 by the winding bearing 4, and the winding device 50 is supported by the winding bearing 4 on the webbing wheel shaft 2 and can rotate in both directions around the webbing wheel shaft 2.
In addition, due to the support of the winding bearing 4 and the inner wall of the first shaft sleeve 51 is mounted around the webbing wheel shaft 2 without contacting with the webbing wheel shaft 2, when the first shaft sleeve 51 is forced to rotate, the first shaft sleeve 51 is not collide and scratch with the webbing wheel shaft 2, so it is safe and avoids the reduction of equipment life.
The box 5 has an annular groove 52 formed around the box 5, and a pull cord 6, may be a belt, is mounted in the annular groove 52 and has an end securely connected to the box 5.
The belt pulley 8 on the second shaft sleeve 81 is not located in the middle of the two winding devices 50, but is farther from a left side winding device 50 and is closer to a right side winding device 50. The belt pulley bearing 9 and the two one-way bearings 7 are disposed in the second shaft sleeve 81 and are not limited by the location of the belt pulley 8. So the belt pulley 8 can be designed in the middle of the winding devices 50, or can be offset as shown in the figures of the present invention. This is more suitable for fitness equipment with different structures, for example, the positions of the two pull cords 6 are not asymmetrical with the load position of the fitness equipment.
As shown in
The webbing wheel shaft 2 has two locating sleeves 21, 10. One of the locating sleeves 21 is formed with the webbing wheel shaft 2 by welding, casting, engaging, etc., the other one of the locating sleeves 10 has an anti-rotation surface 101, and the webbing wheel shaft 2 has an anti-rotation surface 22. When the locating sleeve 10 is mounted on the webbing wheel shaft 2, the anti-rotation surface 101 engages with the anti-rotation surface 22, and a limit circlip 11 is sleeved on the webbing wheel shaft 2 and is held the locating sleeve 10.
As shown in
Each one of the two locating sleeves 21, 10 is mounted in the winding space between the cover 1 and the box 5 of one of the two winding devices 50. Each winding device 50 has a coil spring 3, the coil spring 3 is disposed in the winding space between the cover 1 and the box 5. In one of the winding devices 50, the coil spring 3 has an end connected to the locating sleeve 21 and another end connected to an inner wall of the box 5. In the other one of the winding devices 50, the coil spring 3 has an end connected to the locating sleeve 10 and another end connected to an inner wall of the box 5.
The annular groove 52 is disposed closer to the belt pulley 8 than the winding space that is formed between the cover 1 and the box 5. That is, the pull cord 6 is disposed closer to the belt pulley 8 than the coil spring 3.
In use, as shown in
The webbing wheel shaft 2 is securely connected to an equipment 12, and the equipment 12 may be a rowing machine or the like.
The pull cords 6 are pulled out by a user to drive the winding devices 5 to rotate, and the coil springs 3 are deformed.
At the same time, the rotations of the first shaft sleeves 51 on the boxes drive the one-way bearings 7, and the one-way bearings 7 drive the second shaft sleeve 81 to rotate. Then the belt pulley 8 is rotated with the second shaft sleeve 81 and a belt of the belt pulley 8 resists loads such as the blades of the rowing machine.
When the user releases the pull cords 6, the coil springs 3 are reset, the boxes 5 are reversely rotated, and the pull cords 6 are rewound into the annular grooves 51. Since the one-way bearings 7 rotate in one direction, the belt pulley 8 does not rotate. An action is completed.
The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202120597923.5 | Mar 2021 | CN | national |
