The present disclosure concerns an electrically powered vehicle, such as a pedal-actuated cycle, with certain embodiments further comprising a load distribution system comprising a first-class lever.
The demand for electrically powered bicycles has significantly increased as they have become much more economically priced due to modern advancements in energy storage technologies. This allows almost anyone to ride a bicycle without the strenuous physical activity typically required to operate traditional bicycles. More people are now enjoying longer bicycle excursions because of the electrical assistance provided by electric bicycles. Additionally, significantly increased development of bicycle trails has also encouraged people to pursue bicycle riding. For example, organizations have converted unused railroad beds into dedicated bicycle trails, which have been of significant interest to bicycle riders because they are predominately flat, thereby enabling riders to enjoy a relatively easy ride. The combination of affordable electric bicycles and the expansion of new bicycle trails has created new opportunities and incentives for people to explore the outdoors using electric bicycles.
However, electric bicycles are currently limited to single rider configurations because of the limited power available for current electric bicycles, which does not allow for additional passengers. Thus, many people that are unable to ride a bicycle due to inability, or disability, are deprived from the opportunity that electric bicycles provide. Recent attempts to build “sidecars” similar to those used in motorcycles to onboard passengers have been unsuccessful because the bicycle pilot must still provide enough power to transport the additional weight of the added passenger. Similarly, trailers exist on the market for carrying various cargo, but most are limited to capacities at or below 100 pounds, which are not powered, so additional effort is required from the rider.
Moreover, traditional suspension systems in tow-behind trailers include traditional leaf spring designs and Torflex™ suspension systems. These systems have remained unchanged for decades due to their long-standing acceptance in the market, their simplicity, and their cost-effectiveness. Both systems use a pair of reaction springs on each side of the trailer that act independently of each other. The advantage of these systems is that they enable the trailer to navigate terrain obstacles that only effect one side of the vehicle such as when the trailer is pulled over uneven terrain. The independent actions of the springs allow for the affected side to respond to the obstacle without dramatic impact on the opposite side of the trailer. However, when an uneven load favors one side of the trailer, the reaction spring on the overweighted side proportionally depresses, causing the overweighted side of the trailer to sag. This effect results in trailers leaning to one side when either loaded unevenly, or when the trailer is pulled around a sharp corner, which introduces a potential roll over risk and/or reduces the loading capacity of the trailer. This effect is more pronounced with taller loads or those with uneven weight distributions.
Currently, there are no commercial alternatives to the traditional independent suspension systems. Aftermarket solutions that alter vehicle suspension systems by “stiffening” the suspension springs result in improved stability and reduced lean, but these alterations come with the trade-off of a much “rougher ride.”
Therefore, there is a need for a system that provides an optimum combination of load balancing capacity stability while maintaining a “smooth” ride.
Certain disclosed embodiments concern a system comprising a pedal-actuated vehicle coupled to a frame, wherein the frame has at least one motorized wheel operably connected thereto, and a power source for powering the system. The pedal actuated vehicle can be, for example, a bicycle or tricycle. In certain disclosed embodiments, a control is electrically coupled to the power source and motorized wheel. Although variable, the control may be a throttle, a pedal-assist sensor, a display, or any combination thereof.
The system may further comprise a load distribution system coupled to the frame. The load distribution system typically comprises a rocker arm configured to displace a spring. Although variable, the rocker arm typically comprises a first end portion configured to engage the spring, the first end portion having a length ranging from greater than 0 inches to 55 inches; and a second end portion configured to engage the axle, the second end portion having a length ranging from greater than 0 inches to 12 inches.
Yet another disclosed embodiment of the disclosed system comprises a spring configured to be associated with a frame having an axle or to which an axle can be coupled. The spring rate can vary, depending on the needs of a user, but typically has a spring rate in the range of from greater than 0 pounds/inch to 500 pounds/inch. A rocker arm is operably associated with the axle and the spring and configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm. A motorized wheel is rotatably coupled to the rocker arm. The rocker arm comprises a first end portion configured to engage the spring, and a second end portion configured to engage the axle. The length ratio of the first end portion to the second end portion ranges from 2 to 10.
A particular disclosed trailer comprises a frame having a rocker arm or to which a rocker arm can be coupled, the rocker arm configured to displace a spring to act as a suspension system in response to a force applied to the rocker arm. A power source is operably associated with the frame, and a computerized electrical system is electrically coupled to the power source. Finally, a bicycle, particularly an electrically powered bicycle, is operably associated with the trailer.
A method for using disclosed embodiments also is disclosed. The method comprises providing any of the various disclosed system embodiments and using such embodiments to electrically power a desired system, such as an electrically powered trailer or cart that delivers propulsive power to an associated cycle, such as a bicycle.
A method for mounting disclosed embodiments to an existing frame, trailer, vehicle, cycle, etc. is also disclosed. The method generally comprises attaching various disclosed components to a frame, such as trailer to electrically power the trailer. The method may further comprise mounting various components of a load distribution system to the frame, to act as a suspension system.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
For purposes of this description, certain aspects, advantages, and novel features of the embodiments of this disclosure are described herein. The disclosed system and method embodiments should not be construed as being limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and sub-combinations with one another. The system and methods are not limited to any specific aspect or feature or combination thereof, nor do the disclosed embodiments require that any one or more specific advantages be present, or problems be solved.
Although the operations of some of the disclosed embodiments are described in a particular, sequential order for convenient presentation, it should be understood that this manner of description encompasses rearrangement, unless a particular ordering is required by specific language set forth below. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed methods can be used in conjunction with other methods. Additionally, the description sometimes uses terms like “provide” or “achieve” to describe the disclosed methods. These terms are high-level abstractions of the actual operations that are performed. The actual operations that correspond to these terms may vary depending on the particular implementation and are readily discernible by one of ordinary skill in the art.
All features described herein are independent of one another and, except where structurally impossible, can be used in combination with any other feature described herein.
As used herein and in the claims, the singular forms “a,” “an,” and “the” include the plural forms unless the context clearly dictates otherwise.
The terms “includes,” “has” or “haves” mean “comprises.”
The term “coupled” generally means physically, mechanically, chemically, magnetically, and/or electrically coupled or linked and does not exclude the presence of intermediate elements between the coupled or associated items absent specific contrary language.
In the description, certain terms may be used such as “up,” “down,” “upper,” “lower,” “horizontal,” “vertical,” “left,” “right,” and the like. These terms are used, where applicable, to provide some description clarity when referring to relative relationships. However, these terms are not intended to imply absolute relationships, positions, and/or orientations. For example, with respect to an object, an “upper” surface can become a “lower” surface simply by turning the object over. Nevertheless, it is still the same object.
The disclosed embodiments of the present disclosure concern a load distribution system, and an electrically powered wagon, frame, trailer, vehicle, or cycle. These two features are described independently below. These two features are also described in combination.
Conventional suspension systems use a leaf spring configuration such that each spring is mounted underneath the frame and a solid axle extends across the trailer underneath the frame. For example,
On the other hand, the load distribution system disclosed herein includes a lever and a spring. The spring can be mounted on the outside of a vehicle frame. In some embodiments of the load distribution system disclosed herein, the spring is configured to be associated with the frame of a vehicle. In some embodiments, the frame may include an axle. In some aspects, the axle may be coupled to the frame. In some embodiments, the lever is a first-class lever comprising a rocker arm. The rocker arm can be operably associated with the axle and the spring and configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm. In some embodiments an end portion of the rocker arm can be coupled to the spring. In other embodiments the rocker arm can be coupled to an axle. Thus, the first-class lever engages each suspension while linking opposite ends of the trailer (i.e., dependent) for load balancing and the axle of the trailer functions as a torsional spring between each side of the system and thus enabling each side to react independently when encountering obstacles. The load distribution disclosed herein is superior to traditional suspension systems because of its partially dependent and partially independent suspension system provides for improved stability while maintaining a smooth ride on uneven terrains.
In some embodiments, as illustrated in
The load distribution system disclosed herein can be used in vehicles such as automotive vehicles or trailers used in hauling cargo. For example, the trailers can be agricultural equipment trailers, boat trailers, personal car trailers (i.e., carriers), horse trailers, bicycle trailers, and the like. In some embodiments, the system is configured for retrofitting to an existing frame comprising at least one axle.
A. Single Axle Configuration
The load distribution system disclosed herein improves vehicle payload stability and shock resistance. The load distribution system can be configured for coupling to a vehicle having a single axle configuration, and thereby increase the ability of the system to redistribute the loading capacity relative to prior known suspension systems. In some embodiments, the load capacity can be in the range of from greater 0 pound to 10,000 pounds, such as from 0 pounds to 6,000 pounds, such as from greater than 0 pounds to 3,500 pounds, such as from greater than 0 pounds to 3,500 pounds, such as from greater than 0 pounds to 2,000 pounds.
In some embodiments, as shown in
In some embodiments, the rocker arm 702 is curved such that a finger 714 is formed on an end portion of the rocker arm as illustrated in
In particular disclosed embodiments, as depicted by
The spring 704 can be coupled to the first end portion having a length B. In some embodiments, the end portion having length B can have a length of greater than 0 inch to 30 inches, such as from 15 inches to 30 inches, from 20 inches to 25 inches, from 21 inches to 24 inches, or from 22 inches to 23 inches. In some aspects, the end portion of the rocker arm comprising a mounting plate includes an aperture for securing the spring. For example, a rod 722 may extend through the mount 710 attached to the outside of frame, further extend through spring 704, and extend through the aperture of the end portion of the rocker arm comprising mounting plate. The rod can be secured to both mounts via fasteners 720; thereby coupling the rocker arm to the spring.
In view of
In some embodiments, the wheel is rotatably coupled to the rocker arm. Moreover, the rocker arm may comprise a spindle for attaching the wheel 712 of the vehicle. The rocker arm may comprise the spindle at end portion opposite the spring 722. The wheel may be attached to the spindle via a hub 724 comprising at least one bearing, wherein the at least one bearing is configured to the spindle, and thereby attach the wheel 712 to the rocker arm 702. In some embodiments, the end portion comprising the spindle may have a length C, which is depicted by
In particular disclosed embodiments, the material of the rocker arm comprises steel and can have a thickness of from greater than 0 inch to 2 inches. In one exemplary embodiment, the rocker arm has a thickness of 0.75 inch. In another exemplary embodiment, the rocker arm has a thickness of 1 inch.
In some embodiments, the axle is secured to the load distribution system via a securing device. For example, the securing device can be a pin as illustrated in
When a wheel encounters an obstacle, the wheel moves in the upward direction, and thus acting across the rocker arm which compresses the spring and hence the spring acts as a form of suspension for the wheel because the spring pushes on the rocker arm and actuates the wheel. In view of this, springs having a spring rate in pound/inch (k) can be selected according to the desired capacity. In some embodiments, the spring rate can have a range of from 50 pound/inch to 500 pound/inch. In one exemplary embodiment, the spring has a spring rate of 96 pound/inch. In another exemplary embodiment, the spring has a spring rate of 195 pound/inch. In yet another exemplary embodiment, the spring has a spring rate of 353 pound/inch.
In certain specific embodiments, the length A (see
In some embodiments, the load distribution system may include a rocker arm and may comprise a spindle at an end portion opposite the spring.
As previously discussed, axles on the market are fixed rigid axles—do not twist or rotate—and thus each side of the vehicle only includes independent suspension. On the other hand, the present disclosure comprises a non-rigid axle extending across the frame and pivots via the rocker arms. In some embodiments, the rocker arm may include at least one aperture through the second end portion of the rocker arm to provide clearance for a sleeve bearing that comprises a housing that the axle is placed into. In particular disclosed embodiments, the sleeve bearing is a pressure fit sleeve bearing. Thus, the axle is inserted into housing and extends inside the sleeve and is supported by the sleeve bearing.
The axle can have a diameter in the range of from greater than 0 inch to 5 inches, such as from greater than 0 inch to 3 inches, greater than 0 inch to 2 inches, from 1 inch to 2 inches, from 1 inch to 1.9 inches, from 1 inch to 1.8 inches, from 1 inch to 1.7 inches, from 1 inch to 1.6 inches, from 1 inch to 1.5 inches, from 1 inch to 1.4 inches, from 1 inch to 1.3 inches from 1 inch to 1.2 inches, or from 1 inch to 1.1 inches.
In some embodiments, length D, as shown in
In particular disclosed embodiments, the axle is placed through a receiver 1020, which operates as a cover for the axle 1004. In some embodiments, the receiver 1020 is a hollow pipe that is attached to the underside/bottom of the frame perpendicular to the wheels. In some embodiments, the receiver 1020 can be attached to the frame via welding.
Moreover,
In particular disclosed embodiments, the material of the sleeve bearing is a metal or metal alloy. For example, the metal can be 863 iron-copper, iron-copper, or bronze. In some embodiments, the sleeve bearing is an oil embedded sleeve bearing and thus self-lubricates. The oil can be a lubricant such as a natural oil (e.g., mineral or vegetable oils) or synthetic base oils, or blends thereof. For example, the lubricant can be SAE 90 oil, ISO 460 oil, or SAE 20 oil. As a result, the oil embedded sleeve bearings allow for the rocker arms to pivot, which allows for the axle to pivot with the rocker arms.
In some embodiments, the sleeve bearing may have a sleeve bearing radial capacity in the range of 3,000 pounds to 15,000, such as from 3,000 pounds to 4,000 pounds, from 5,000 pounds to 6,000 pounds, from 6,000 pounds to 7,000 pounds, from 7,000 pounds to 8,000 pounds, from 8,000 pounds to 9,000 pounds, from 9,000 pounds to 10,000 pounds, from 10,000 to 11,000 pounds, from 11,000 pounds to 12,000 pounds, from 12,000 pounds to 13,000 pounds, from 13,000 pounds to 14,000 pounds to 15,000 pounds
In certain specific aspects, the values are as indicated below in Table 2.
B. Tandem Axle Configuration
In some embodiments, the load distribution system disclosed herein can be configured with a vehicle having a tandem axle configuration, and further increase the loading capacity relative to the single axle configuration. In particular disclosed embodiments, the load distribution system disclosed herein is configured for retrofitting to an existing frame comprising at least two axles.
In some aspects of the particular disclosed invention, the load distribution system comprising a tandem axle configuration may further include an equalizer. In particular disclosed embodiments, the rocker arm can be attached to the equalizer. In some embodiments, the load capacity can be in the range of greater than 0 pounds. to 10,000 pounds, such as from 2,000 pounds to 10,000 pounds, from 3,000 pounds to 9,000 pounds, from 4,000 pounds to 8,500 pounds, from 5,000 pounds to 8,000 pounds, or from 6,000 pounds to 8,000 pounds
In some embodiments, as depicted in
In particular disclosed embodiments, the tandem axle configuration of the load distribution system disclosed herein does not add any additional width than the traditional suspension systems. Thus, the equalizer may comprise a plurality of components (i.e., multi-pieced) such that it suits the spaces provided between the wheels of the trailer and the side of the frame of the trailer. For example, the rocker arm may comprise a first component 1514, wherein the first component comprises a pivot point 1516 of the equalizer and a portion for attaching the axle 1506. The equalizer provides a pivot point 1516 such that the wheels can move in the upwards and in the longitudinal direction and downwards in the longitudinal direction relative to each other. For example, if the trailer encounters an obstacle on the front wheel, the rear wheel will still move down and contact the ground. Moreover, the equalizer safeguards that the force applied on the front wheel is the same force as the force being carried on the rear wheel because it naturally pivots.
The rocker arm may comprise a second component 1518 operable associated with the axle 1506. Additionally, the rocker arm 1502 may comprise a third component 1520 attached to the bottom of the end portion of the rocker arm 1502. In some embodiments, the third component 1520 includes a gusset providing additional support to the frame while also stiffening the mount for securing the spring as depicted in
The rocker arm can have a thickness of from greater than 0 inch to 5 inches, such as from greater than 0 inch to 4 inches, from greater than 0 inch to 3 inches, from greater than 0 inch to 2 inches, or from greater than 0 inch to 1 inch. In view of
In some embodiments, rocker arm may comprise a length ratio of a second portion to a first portion. For example, the ratio can be a ratio of length F (inches) to length E (inches). The ratio of length F to length E can be in the range of from 4 to 10, such as from 5 to 9, from 5 to 8, from 5 to 7, or from 5 to 6.
When a wheel encounters an obstacle, the wheel moves in the upward direction, and thus acts across the rocker arm, which compresses the spring and hence the spring acts as a form of suspension for the wheel because the spring pushes on the rocker arm and actuates the wheel. In view of this, springs having a spring rate in pound/inch (k) can be selected according to the desired capacity. In some embodiments, the spring rate can have a range of from 50 pounds/inch to 500 pounds/inch, such as from 200 pounds/inch to 400 pounds/inch.
In certain specific aspects, the values are as indicated below in Table 3.
In view of
The equalizer may pivot on the pivot joint to equalize the load forces on the load distribution system disclosed herein. In some embodiments, the pivot joint on the equalizer is placed at an end portion of the rocker arm. In some embodiments, the end portion can have a length G, wherein length G can have a range of from greater than 0 inch to 15 inches, such as from 3 inches to 12 inches, from 4 inches to 10 inches, from 4 inches to 8 inches, or from 4 inches to 6 inches.
The axle extends into the sleeve bearing and is thereby supported by the sleeve bearing. In some embodiments, the flange outer diameter can be in the range from greater than 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 2 inches to 3 inches In some embodiments, the outer diameter can be in the range from greater than 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 2 inches to 3 inches The inner diameter can have a range from greater than 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 2 inches to 3 inches. The length of the sleeve bearing can be in the range of from 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 2 inches to 3 inches In some embodiments, the flange thickness can be in the range of from greater than 0 inch to 1 inch, such as from greater than 0 inch to 0.8 inch, from greater than 0 inch to 0.6 inch, from greater than 0 inch to 0.4 inch, from greater than 0 inch to 0.3 inch, from greater than 0 inch to 0.2 inch, or from 0.1 inch to 0.2 inch.
In particular disclosed embodiments, the material of the sleeve bearing is a metal or metal alloy. For example, the metal can be 863 iron-copper, iron-copper, or bronze. In some embodiments, the sleeve bearing is an oil embedded sleeve bearing and thus self-lubricates. The oil can be a lubricant such as a natural oil (e.g., mineral or vegetable oils) or synthetic base oils, or blends thereof. For example, the lubricant can be SAE 90 oil, ISO 460 oil, or SAE 20 oil. As a result, the oil embedded sleeve bearings allow for the rocker arms to pivot, which allows for the axle to pivot with the rocker arms.
In some embodiments, the sleeve bearing may have a sleeve bearing radial capacity in the range of 10,000 pounds to 40,000 pounds, such as from 11,000 pounds to 30,000 pounds, from 11,000 pounds to 25,000 pounds, from 11,000 pounds to 22,000 pounds, from 12,000 pounds to 21,500 pounds, from 12,000 pounds to 21,000 pounds, or from 12,000 pounds to 20,000 pounds.
In certain specific aspects, the values are as indicated below in Table 4.
To control the wheels from pivoting too far up into the underside and/or backside of the vehicle fender, the load distribution system disclosed 1700 herein may include a bushing to provide a counter torque and thus keep the tires aligned.
In some embodiments, a housing 1706 comprising the bushing 1702 is attached to the equalizer 1704 on the backside of the pivot joint for mounting the bushing 1702.
In some embodiments the bushings are square-bonded bushings. In particular disclosed embodiments, the square-bonded bushings may comprise rubber 1800 depicted in
Larger capacity vehicles, such as trailers comprising a tandem axle configuration may include brakes. In particular disclosed embodiments, the load distribution system disclosed herein may include at least one square plate mount for such trailers.
Disclosed herein are embodiments of an electrically powered system, such as a frame, trailer, vehicle, trailer, cart, and/or cycle, wherein propulsion can be delivered via an electrical system. The electrical system may include, for example, a control electrically coupled to a motorized wheel to deliver power to the motorized wheel and to assist propelling a frame, trailer, cart, and/or cycle.
In certain embodiments, the electrical system of the electrically powered trailer may include a display, a pedal assist sensor, a power source, a controller, and an electric motor. In alternative embodiments, the electric system may include a throttle, a display, a pedal assist sensor, a power source, a controller, and an electric motor. In certain embodiments, the electric system may include a pedal assist sensor, a throttle, a display, a pedal assist sensor, a controller, a power source, and an electric motor. The electric system may comprise cabling to connect features of the system and such cables may be suitable for transmitting power and/or data.
The power source may include a power supply and a controller. In some embodiments, the power supply is a battery or a rechargeable battery. The power supply may be suitable for powering the electrically powered trailer and may be configured to connect to an electric motor, for example an electric motor located on a wheel. The power supply may be configured for providing power at a range from greater than 0 volts to 100 volts, such as from 24 volts, 36 volts, 48 volts, or any other voltage.
In certain embodiments the electrically powered trailer may include a controller for implementing power to the electric motor. In certain embodiments, the controller can control the motor output power. In other aspects the controller may also regulate the speed of the electrically powered trailer. In some embodiments, the controller is a computing system comprising a central processing unit (CPU). Moreover, the controller can be configured to manage the power output by the power source. The controller may be operable connected to a power connector for connecting the power source to the electric motor, and to a control connector for connecting at least one control.
In some embodiments, the electric motor is separably connectable to the power source via a power connector. Moreover, a controller may transmit a signal communicating data to the power source, wherein the controller uses the data to manage the supply of power by the power source and the controller is separably connectable to the power source via a connector.
In particular disclosed embodiments, an electrically powered trailer is associated with an external vehicle. For example, the external vehicle can be a bicycle, wherein the pilot rider of the bicycle can control power delivered to the electrically powered trailer to assist with propulsion of the electrically powered trailer and bicycle.
In some embodiments, the components of the electrical system can be external components, wherein the controls are coupled to an external vehicle. Thus, the electrically powered trailer may receive input from a pilot user via the external components. For example, the electrically powered trailer can be associated with a bicycle, wherein the bicycle pilot transmits information to the electric system.
In particular disclosed embodiments, the performance characteristics of an electrically powered trailer can be controlled by the external components. In certain embodiments, appropriate software controls and/or monitors the performance of the electrically powered trailer.
In certain embodiments, the control parameters may include a pedal assist sensor, wherein the motor assists the electrically powered trailer. In other embodiments, the control parameters may include a power on demand mode, wherein the pilot rider controls the motor power output via a throttle. In some embodiments, an external component such as a control can be configured to determine one or more control parameters based on pilot rider and/or passenger.
The controller may be configured to manage the electrical power output by the power supply, and/or the power output of an electric motor. The controller may be configured to manage the power supply. Controller may be configured to manage the power supplied to the power connector. The controller may comprise a processor and data storage. The data storage may store computer executable instructions, wherein the processor may be configured to, when executing the instructions, control the power supply.
The controller can be configured to receive data from a control, or from multiple controls via a control connector of the power unit. The controller may be configured to control the power source such that power is supplied to the electric motor, or power is stopped from being supplied to the electric motor. The controller may vary the power output from the power supply, the power unit and/or electric motor, depending on the data received from the control or controls via the control connector(s). Thus, the controller may be configured to vary the power output based on data received from a single, or multiple, control devices.
The electrical system may include a controller connector for connecting the controller to the power source or the controller connector of the power source. The controller connector may comprise a power and/or data cable and an associated male/female connector head. The power/data cable may be attached to, or integral with, members of an associated frame or electrically powered trailer or cart. The control connector of the power source may, for example, comprise a standard USB input/output port. The control connector, connected to the control, may comprise a data cable integral with a USB connector, arranged to be inserted into the control connector of the power source, thereby connecting the control to the power source. Alternatively, the controller connector and controls connectors may both comprise wireless transceivers.
In certain embodiments, a housing comprising a motor is configured to at least one wheel of the electrically powered trailer. The motor can be any motor for powering a bike. In some embodiments, the motor can be a hub motor for mounting on the hub of a wheel. In certain embodiments, the motor may include a rotor and a stator to generate a rotary force to drive at least one wheel. The housing is installed on the wheel so as to be rotated together with the wheel. The motor may be geared or gearless and the motor can have any suitable motor rating, such as a motor rating ranging from 100 watts to 1000 watts.
In some embodiments, the power source can power the electric motor. The motor may be powered by DC power. The motor may comprise solid-state electronic switching circuit. The motor may be configured to be powered by asynchronous AC power.
In some embodiments, the electrically powered trailer may include a compartment for securing the power source. The electrically powered trailer may include a connector to connect the power source to the electrical system. In certain embodiments, the electrically powered trailer includes a cover for protecting the connector.
The electric system may comprise a motor connector for connecting the motor to the power source or the power connector of the power source. A motor connector may facilitate connecting the power source to the motor. The motor connector may comprise a power cable and an associated male/female connector head. The motor connector may be conveniently located for connection with a power connector of the power source. The power cable may be attached to, or integral with members of the frame of the electrically powered trailer. A motor connector may be compatible with a power connector of the power source.
In certain embodiments the control may comprise an electronic device, wherein information may be used to determine how much power the electric motor should output. This may be achieved by controlling the amount of power output by the power source to the motor.
The electric system may comprise one or more controls, each with corresponding control connectors connectable to the power source. In some embodiments, the controls can be a throttle, a pedal-assist sensor, or a display. In particular disclosed embodiments, the controls can communicate with the controller wirelessly and/or through wired connection, for example, through the control connectors. These controls can be a computing system, at least one data source, and/or network. In some embodiments, the control can be a display. In certain embodiments, the display can include a dashboard that projects any of the measured, detected, or calculated parameters, conditions, directions, controls, inputs, and/or the like. The display device provides for the presentation of a graphical user interface (GUI) application software data, and multimedia presentations, and the like. The display may further include one or more multimedia devices, such as speakers, video cards, graphics accelerators, and microphones, and the like.
In some embodiments, the electrically powered trailer may comprise a load distribution system to engage with at least one suspension spring. The load distribution system may include a rocker arm and a spring that are associated with a frame having an axle or to which an axle can be mounted. In some embodiments, the load capacity of the system may be in the range of from greater than 0 pounds to 10,000 pounds, such as from greater than 0 pounds to 6,000 pounds, from greater than 0 pounds to 3,500 pounds, from greater than 0 pounds to 3,500 pounds, or from greater than 0 pounds to 2,000 pounds.
In some embodiments, the rocker arm may comprise a first end portion and a second end portion. A spring can be coupled to the first end portion of the rocker arm and an axle can be coupled to the second end portion of the rocker arm. With reference to
In certain embodiments, the electrically powered trailer can have a length L (see
In some embodiments, the tongue 2214 extends out from the frame 2208. A first end portion of tongue 2214 is attached to the frame 2208 and a second end portion is coupled to a vehicle via a hitch 2220. As illustrated by
In certain embodiments, handlebar 2218 attached to the frame 2208 can be used by a passenger for support. Furthermore, as illustrated by
In some embodiments, the frame is constructed from wood, metal, or alloy. For example, the frame can be made from steel, aluminum, or a combination thereof. In an exemplary embodiment, the frame was constructed from 6061 steel alloy. In another exemplary embodiment, a frame was constructed from wood.
In some embodiments of the electrically powered trailer comprising a load distribution system, at least one spring can have a free length (F.L.) in the range of greater than 0 inch to 25 inches, such as from 5 inches to 15 inches, or from 5 inches to 10. In some embodiments the spring can have an outside diameter (O.D.) of from greater than 0 inch to 10 inch, such as from 1 inch to 4 inches, from 1 inch to 3 inches, or from 1 inch to 2 inches. In some embodiments, the spring can have an inside diameter (I.D.) of from greater than 0 inch to 10 inch, such as from 1 inch to 4 inches, from 1 inch to 3 inches, or from 1 inch to 2 inches. In some embodiments, the spring can have a wire diameter (W.D.) of from greater than 0 inch to 2 inches, such as from greater than 0 inch to 1.5 inches, from greater than 0 inch to 1 inch, or from greater than 0 inch to 0.5 inch.
In some embodiments an electrically powered trailer can comprise a load distribution system comprising at least one spring, such as spring 2206. Such spring can have any suitable spring rate selected according to a desired capacity, such as a spring rate measured in pound/inch (k). In some embodiments, the spring rate can have a range of from 20 pounds/inch to 300 pounds/inch, such as from 40 pounds/inch to 200 pounds/inch, from 60 pounds/inch to 150 pounds/inch. In one exemplary embodiment, the spring has a spring rate of 137 pounds/inch. In yet another exemplary embodiment, the spring has a spring rate of 353 pounds/inch.
The rocker arm is operably associated with the axle and is configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm. Certain embodiments are configured for retrofitting to an existing frame, such as a trailer or vehicle frame, comprising at least one axle.
In some embodiments, the axle can be made from a metal or alloy. For example, the axle can be made from steel, aluminum, or a combination thereof. The axle can have a diameter in the range of from greater than 0 inch to 5 inches.
In particular disclosed embodiments, the axle is placed through a receiver, which operates as a cover for the axle. In some embodiments, the receiver is a hollow pipe that is attached to the underside/bottom of the frame perpendicular to the wheels. In some embodiments, the receiver can be attached to the frame via welding. A sleeve bearing can be attached to the ends of the receiver, wherein the axle extends into the sleeve bearing and is thereby supported by the sleeve bearing. In some embodiments, the outer diameter (O.D.) of the sleeve bearing can be in the range from greater than 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 1 inch to 2 inches In other aspects, the inner diameter inner diameter (I.D.) of the sleeve bearing can have a range from greater than 0 inch to 5 inches, such as from 1 inch to 4 inches, 1 inch to 3 inches, or 1 inch to 2 inches. In other particular disclosed embodiments, the length (L) of the sleeve bearing can be in the range of from greater than 0 inch to 5 inches, greater than 0 inch to 4 inches, greater than 0 inch to 3 inches, greater than 0 inch to 2 inches, greater than 0 inch to 1 inch, greater than 0 inch to 0.5 inch. In some embodiments, the flange thickness (F.T.) of the sleeve bearing can be in the range of from greater than 0 inch to 1 inch, such as from greater than 0 inch to 0.8 inch, from greater than 0 inch to 0.6 inch, from greater than 0 inch to 0.4 inch, from greater than 0 inch to 0.3 inch, from greater than 0 inch to 0.2 inch, or from greater than 0 inch to 0.1 inch.
In particular disclosed embodiments, the material of the sleeve bearing is a metal or metal alloy. For example, the metal can be iron-copper, or bronze. In an exemplary embodiment, the metal is 863 iron copper. In some embodiments, the sleeve bearing is an oil embedded sleeve bearing and thus self-lubricates. The oil can be a lubricant such as a natural oil (e.g., mineral or vegetable oils) or synthetic oils, or blends thereof. For example, the lubricant can be SAE 90 oil, ISO 460 oil, or SAE 20 oil. As a result, the oil-embedded sleeve bearings allow for the rocker arms to pivot independently, which allows for the axle to move as the rocker arms move.
In some embodiments, the sleeve bearing may have a sleeve bearing radial capacity in the range of 200 pounds to 5,000, such as from 300 pounds to 4,000 pounds, from 400 pounds to 2,000 pounds, from 500 pounds to 1,800 pounds, from 600 pounds to 1,600 pounds, from 800 pounds to 1,400 pounds, or from 900 pounds to 1,200.
Traditional bicycle trailers do not include suspension systems, which results in a rough ride for a passenger.
The electrically powered trailer 2600 comprises a load distribution system 2602 coupled to a motorized wheel 2604. The electrically powered trailer 2600 also comprises a housing for a battery 2606 and controller. In some embodiments, the electrically powered trailer may include additional features, such as a headlight 2608, seatbelt, cupholders, footrests, supportive seats, reflectors, and the like. Meanwhile, the controls for the electric system are mounted to the pilot bicycle 2610 and include a pedal-assist sensor, throttle, and display. In this manner, the pilot rider controls the power delivered by the trailer to assist with propulsion. The load distribution system 2602 includes a rocker arm 2612 operably associated with an axle and configured to displace a spring 2614 mounted to the frame of the electrically powered trailer in response to a force applied to the rocker arm 2612.
A method of assembling the load distribution is also disclosed herein. Certain embodiments are configured for retrofitting to an existing frame, such as a trailer or vehicle frame, comprising at least one axle. In particular disclosed embodiments the trailer or vehicle frame may include one axle. In other embodiments, the trailer or vehicle frame may include two axles.
In some embodiments, the method may include configuring a spring to be disposed on an outer surface of a frame comprising at least one axle; mounting a rocker arm to be operably associated with the axle and the spring and configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm. In some embodiments, the method further includes coupling at least one wheel to the rocker arm.
In alternative embodiments, the method may include configuring a spring to be disposed on an outer surface of a frame comprising at least one axle; mounting a rocker arm to be operably associated with the axle and the spring, and configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm; attaching an equalizer to the rocker arm; and coupling at least one wheel to the equalizer.
A method of assembling the load distribution system 2700 to a vehicle frame 2702 having an axle 2704 is illustrated by
A method of assembling the load distribution system 2800 to a vehicle frame 2802 having an axle 2804 is illustrated by
This example models forces experienced by a rocker arm of a disclosed load distribution system. Rocker arm 2900 comprises a finger portion 2902 attached to a first end portion 2904. The first end portion 2904 is operably associated with a spring when assembled and is configured to displace the spring to act as a suspension system in response to a force applied to the rocker arm. Finger portion 2902 of rocker arm redistributes the stress concentration when a force is applied.
Without the finger portion 2902, a stress concentration is applied to the rocker arm. Finger 2902 redistribute stress around the finger area with a stress of 3.189e04.
Therefore, this example illustrates using a finger portion to distribute stress across the finger portion of the rocker. A rocker arm that does not include a finger portion produces a high stress concentration in the upper end portion of the rocker arm.
In this example, a traditional suspension system was modeled.
In this example, an embodiment of the load distribution system disclosed herein was modeled and compared to the model of Example 2.
Therefore, the linking of both sides of the trailer frame via the axle and first rocker arm and the second rocker arm reduces trailer leans during cornering or when caring a non-centered load. Additionally, the first rocker arm and second rocker arm used to compress the first spring 3204 and second spring 3206 spring redirect the shock loading back downward into the frame 3202 instead of upwards and into the cargo when navigating uneven terrain.
In this example, the shock loading of a traditional trailer was compared to a trailer comprising an embodiment of the load distribution system comprising a single axle configuration. Both trailers had the same capacity, similar weights, and carried the same load, and were pulled over a two by four piece of plywood at approximately 22 mph.
In contrast,
This example demonstrates that disclosed embodiments of the load distribution system can be extremely useful for trailers that carry valuable cargo, such as animals. For example, racehorses usually have to travel long distances on trailers, which encounter similar obstacles, and thus the load distribution system disclosed herein can provide a competitive advantage by reducing the amount of stress on the legs of the racehorses prior to a race.
In view of the many possible embodiments to which the principles of the present disclosure may be applied, it should be recognized that the illustrated embodiments are only preferred examples of the present disclosure and should not be taken as limiting the scope of the present disclosure. Rather, the scope of the present disclosure is defined by the following claims. We therefore claim as our present disclosure all that comes within the scope and spirit of these claims.
This application claims the benefit under 35 U.S.C. § 119(e) of the earlier filing date of U.S. Provisional Application No. 63/331,473, filed on Apr. 15, 2022, which is incorporated herein by reference in its entirety, and is further related to subject matter disclosed by U.S. Provisional Application No. 63/331,475, filed on Apr. 15, 2022, which also is incorporated herein by reference.
Number | Date | Country | |
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63331473 | Apr 2022 | US |