Bidirectional linear actuator and bicycle using the same

Abstract

A bidirectional linear actuation system may include a remote control interface, a bidirectional linear actuator, the bidirectional linear actuator having a main body and an extension body configured to cooperate telescopically with the main body and configured to move relative to the main body to transition between an extended position and a retracted position, and a work converter configured to receive an input force from the remote control interface over a first displacement distance and configured to generate an output force over a second displacement distance that causes the extension body to move relative to the main body.

Description

BIDIRECTIONAL LINEAR ACTUATOR AND BICYCLE USING THE SAMECROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present disclosure claims the benefit of U.S. Provisional Application Ser. No. 63 / 554,079 filed on February 15, 2024, entitled Bidirectional Linear Actuator System, U.S. Provisional Application Ser. No. 63 / 661,749 filed on June 19, 2024, entitled Remote-Control Interface with Work Conversion System, U.S. Provisional Application Ser. No. 63 / 680,210 filed on August 7, 2024, entitled Bidirectional Linear Actuator System, and U.S. Provisional Application Ser. No. 63 / 686,993 filed on August 26, 2024, entitled Remote-Control Interface with Work Conversion System, each of which are fully incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure is generally directed to linear actuators and more specifically to bidirectional linear actuators for use with, for example, bicycles and adjusting a height of a bicycle seat.BACKGROUND INFORMATION

[0003] Bicycles include a plurality of wheels, pedals, a drivetrain (e.g., a chain or a belt) to couple the pedals to one of the wheels, a handle bar for steering, and a seat for supporting the rider. The bicycle is propelled along terrain in response to a user applying a force to the pedals. As the nature of the terrain varies (e.g., on an off-road trail), it may desirable to the rider to adjust a height of the seat to improve the riding experience.

[0004] In some instances, it may be beneficial for a height of the seat to be adjusted while the rider is actively riding the bicycle. In one example, a user’s weight may be used to lower the seat to a lowered position while the bicycle is being ridden. In this example, as the seat is lowered, a spring may be compressed and held in a compressed state (e.g., by a latch). To return the seat to a raised position, the spring is released from the compressed state causing the seat to move to the raised position. In this example, a user is required to adjust a body position in order to transition the seat to the lowered position, which may be inconvenient to the rider. In another example, compressed air (e.g., stored on the bicycle) may be used to cause the seat to move to the lowered position and a spring (or compressed air) may be used to cause the seat to move to the raised position. While this example may remove the inconvenience to the rider of having to use their own weight to lower the seat, the seat may only be raised a finite number of times before the compressed air supply runsout. Compressed air systems may also have a relatively larger size, additional complexity, additional manufacturing costs, and / or additional weight when compared to the example where a rider’s weight is used to lower the seat.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] These and other features and advantages will be better understood by reading the following detailed description, taken together with the drawings, wherein:

[0006] FIG. 1 is a schematic example of a bidirectional linear actuation system, consistent with embodiments of the present disclosure.

[0007] FIG. 2 is a perspective view of a bicycle having a seat in a lowered position, consistent with embodiments of the present disclosure.

[0008] FIG. 3 is a perspective view of the bicycle of FIG. 2 having the seat in a raised position, consistent with embodiments of the present disclosure.

[0009] FIG. 4 is a perspective view of a remote control interface of the bicycle of FIG. 2 when the seat is in the lowered position, consistent with embodiments of the present disclosure.

[0010] FIG. 5 is a perspective view of the remote control interface of FIG. 4 when the seat is in the raised position, consistent with embodiments of the present disclosure.

[0011] FIG. 6 is an exploded view of the remote control interface of FIG. 4, consistent with embodiments of the present disclosure.

[0012] FIG. 7 is an exploded view of a spooling assembly of the remote control interface of FIG.4, consistent with embodiments of the present disclosure.

[0013] FIG. 7A is a perspective view of an example cable routing through a spooling assembly of a remote control interface with one or more components shown as transparent, consistent with embodiments of the present disclosure.

[0014] FIG. 7B is a perspective view of an example of a spooling assembly of a remote control interface, consistent with embodiments of the present disclosure.

[0015] FIG. 8 is a perspective view of another example of a remote control interface for use with the bicycle of FIG. 2, consistent with embodiments of the present disclosure.

[0016] FIG. 9 is an exploded view of the remote control interface of FIG. 8, consistent with embodiments of the present disclosure.

[0017] FIG. 10 is a perspective view of another example of a remote control interface for use with the bicycle of FIG. 2, consistent with embodiments of the present disclosure.

[0018] FIG. 11 is an exploded view of the remote control interface of FIG. 10, consistent with embodiments of the present disclosure.

[0019] FIG. 12 is an exploded view of an example of a remote control interface having a geartrain, consistent with embodiments of the present disclosure.

[0020] FIG. 13 is a top view of another example of a remote control interface for use with the bicycle of FIG. 2, consistent with embodiments of the present disclosure.

[0021] FIG. 14 is a perspective view of a bidirectional linear actuator of the bicycle of FIG. 2 in a retracted position, consistent with embodiments of the present disclosure.

[0022] FIG. 15 is a perspective view of the bidirectional linear actuator of FIG. 14 in an extended position, consistent with embodiments of the present disclosure.

[0023] FIG. 16 is an exploded view of the bidirectional linear actuator of FIG. 14, consistent with embodiments of the present disclosure.

[0024] FIG. 17 is a perspective view of an actuator of the bidirectional linear actuator of FIG. 14, consistent with embodiments of the present disclosure.

[0025] FIG. 18 is an exploded view of the actuator of FIG. 17, consistent with embodiments of the present disclosure.

[0026] FIG. 19 is a cross-sectional view of the actuator of FIG. 17 taken at the region XIX of FIG.17, consistent with embodiments of the present disclosure.

[0027] FIG. 20 is a cross-sectional view of the actuator of FIG. 17 taken at the region XIX of FIG.17, consistent with embodiments of the present disclosure.

[0028] FIG. 21 is a cross-sectional view of the actuator of FIG. 17 taken at the region XIX of FIG.17, consistent with embodiments of the present disclosure.

[0029] FIG. 22 is a cross-sectional view of the actuator of FIG. 17 taken at the region XXII of FIG. 17, consistent with embodiments of the present disclosure.

[0030] FIG. 23 is a cross-sectional view of the actuator of FIG. 17 taken at the region XXII of FIG. 17, consistent with embodiments of the present disclosure.

[0031] FIG. 24 is a cross-sectional view of the actuator of FIG. 17 taken at the region XXII of FIG. 17, consistent with embodiments of the present disclosure.

[0032] FIG. 25 is a perspective view of a latch body of a latching assembly of the actuator of FIG. 17, consistent with embodiments of the present disclosure.

[0033] FIG. 25 A is an exploded view of an example of an actuator having a latching assembly that includes spherical latch bodies, consistent with embodiments of the present disclosure.

[0034] FIG. 26 is a perspective view of a latching body of a latching assembly of the actuator of FIG. 17, consistent with embodiments of the present disclosure.

[0035] FIG. 27 is a perspective view of a catch of the actuator of FIG. 17, consistent with embodiments of the present disclosure.

[0036] FIG. 28 is a perspective view of a shuttle housing and closure cap of a latching assembly of the actuator of FIG. 17, consistent with embodiments of the present disclosure.

[0037] FIG. 29 is a cross-sectional view of another example of a bidirectional linear actuator for use with the bicycle of FIG. 2, consistent with embodiments of the present disclosure.

[0038] FIG. 30 is a cross-sectional view of the bidirectional linear of FIG. 29, consistent with embodiments of the present disclosure.

[0039] FIG. 31 is a cross-sectional view of the bidirectional linear of FIG. 29, consistent with embodiments of the present disclosure.

[0040] FIG. 32 is a cross-sectional view of the bidirectional linear of FIG. 29, consistent with embodiments of the present disclosure.

[0041] FIG. 33 is a cross-sectional view of a valve of the bidirectional linear actuator of FIG. 29, consistent with embodiments of the present disclosure.

[0042] FIG. 34 is a cross-sectional view of another example of a valve for use with the bidirectional linear actuator of FIG. 29, the valve being in a closed position, consistent with embodiments of the present disclosure.

[0043] FIG. 35 is another cross-sectional view of the valve of FIG. 34, the valve being in a first open position, consistent with embodiments of the present disclosure.

[0044] FIG. 36 is another cross-sectional view of the valve of FIG. 34, the valve being in a second open position, consistent with embodiments of the present disclosure.

[0045] FIG. 37 is a schematic example of an electronically driven bidirectional linear actuation system for use with, for example, the bicycle of FIG. 2, consistent with embodiments of the present disclosure.

[0046] FIG. 38 is a schematic example of an electronically driven bidirectional linear actuation system, consistent with embodiments of the present disclosure.

[0047] FIG. 39 is a schematic example of an electronically driven bidirectional linear actuation system, consistent with embodiments of the present disclosure.DETAILED DESCRIPTION

[0048] The present disclosure is generally directed to a bidirectional linear actuation system. The bidirectional linear actuation system may be used in conjunction with, for example, a bicycle for raising and lowering a seat of the bicycle. In one example, the bidirectional linear actuation system is configured to receive an input force from a user over an input displacement distance, generating input work. The bidirectional linear actuation system includes a work converter and a bidirectional linear actuator. The work converter is configured to receive the input work and to generate an output force that is applied to the bidirectional linear actuator over an output displacement distance. The output displacement distance is greater than the input displacement distance.

[0049] Application of the output force to the bidirectional linear actuator causes the bidirectional linear actuator to move in an extension or a retraction direction. A displacement distance of the bidirectional linear actuator when moving in the extension and retraction directions, is substantially (e.g., within 10% of, within 5% of, within 4% of, within 3% of, within 2% of, within 1% of) equal to the output displacement distance. In this way, the energy required to actuate the bidirectional linear actuator is generated by an input force from a user of the bidirectional linear actuator as opposed to an external (e.g., depletable) energy source. Such a configuration enables repeated actuation of the bidirectional linear actuation system for as long as the user is able to apply the input force.

[0050] In some instances, the bidirectional linear actuator may be configured such that any external forces applied to the bidirectional linear actuator (e.g., a weight of a bicycle rider) are substantially isolated from the components applying the force which causes the bidirectional linear actuator to move in the extension and retraction directions. For example, the bidirectional linear actuator may include an index assembly configured to retain the bidirectional linear actuator in one or more positions (e.g., an extended or a retracted position). The index assembly may be configured to support the weight of any external forces applied to the bidirectional linear actuator. The index assembly may be configured as a passive assembly such that the index assembly substantially (e.g., completely) transitions to the retaining position (or a releasing position) as a result of the bidirectional linear actuator reaching or transitioning away from a corresponding position (e.g., the extended or retracted position).

[0051] In the context of a bicycle, the components applying the force to actuate the bidirectional linear actuator do not need to be configured to withstand a weight of a rider of the bicycle, which may allow the components to be smaller and / or lighter. With this in mind, this may also allow the bidirectional linear actuator to be used with alternative sources for generating the force that actuates the bidirectional linear actuator (e.g., sources that rely on electricity). For example, the force may be generated using a motor, wherein the motor is caused to rotate in response to a user input (e.g., a user actuating an electric switch). The force generated by the motor may be input into the work converter or directly into the bidirectional linear actuator.

[0052] FIG. 1 shows a schematic example of a bidirectional linear actuation system 100. As shown, the bidirectional linear actuation system 100 includes an input device 102, a work transmitter 104, and a bidirectional linear actuator 106. The bidirectional linear actuator 106 is configured to transition between an extended position and a retracted position in response to an application of a force on the input device 102. For example, and as shown, the bidirectional linear actuator 106 includes an actuator main body 105 and an actuator extension body 107. The actuator extension body 107 is configured to extend from the actuator main body 105 when transitioning to the extended position. In other words, the actuator main body 105 and the actuator extension body 107 may generally be described as being configured to cooperate telescopically. The work transmitter 104 is configured to cooperate with the input device 102 and the bidirectional linear actuator 106 such that the application of the force on the input device 102 causes a corresponding movement in the bidirectional linear actuator 106.

[0053] The input device 102 may be remote from the bidirectional linear actuator 106. In other words, the input device 102 may generally be referred to as a remote control interface. In one example, the input device 102 includes at least one control 108. The control 108 is displaceable (e.g., rotationally and / or linearly) in response to the application of the force to the control 108. The displacement of the control 108 causes a corresponding displacement in the bidirectional linear actuator 106. For example, a single (or partial) actuation of the control 108 may cause the bidirectional linear actuator 106 to completely transition from the retracted position to the extended position. In this example, the control 108 can be configured to that a subsequent actuation of the control 108 causes the bidirectional linear actuator 106 to completely transition from the extended position to the retracted position (e.g., using a ratcheting mechanism). By way of further example, a single (or partial) actuation of the control 108 may cause the bidirectional linear actuator 106 totransition to an intermediary position, the intermediary position being between the retracted and extended positions. When at the intermediary position, the bidirectional linear actuator 106 may be configured to be locked in place (e.g., until the control 108 is actuated an additional time to transition the bidirectional linear actuator 106 towards the extended or retracted position). As such, the bidirectional linear actuator 106 may include one or more (e.g., infinite) indexed positions between the extended and retracted positions.

[0054] In some instances, when transitioning between the retracted and extended positions, displacement of the control 108 may be less than the displacement of the bidirectional linear actuator 106. For example, a single displacement of the control 108 may cause the bidirectional linear actuator 106 to transition from the retracted position and completely to the extended position and vice versa. By way of further example, at least two displacements of the control 108 may be required to cause the bidirectional linear actuator 106 to transition from the retracted position and completely to the extended position and vice versa. In this example, the bidirectional linear actuator 106 may include at least one intermediary position that is disposed between the extended and retracted positions. When in the intermediary position the bidirectional linear actuator 106 may be locked (e.g., able to support weight) or unlocked (e.g., unable to support weight). When bidirectional linear actuator 106 includes the intermediary position, the control 108 may be configured to reset such that control 108 can be displaced multiple times to move the bidirectional linear actuator 106 in the same direction. In these instances, the control 108 may include a ratcheting mechanism, a clutch mechanism, and / or the like, which would allow the control 108 to reset without causing movement in the bidirectional linear actuator 106.

[0055] The bidirectional linear actuation system 100 may further include a work converter 110. The work converter 110 is configured to receive a work input from the control 108 (e.g., as a result of a force being applied to the control 108 that displaces the control 108 over a rotational and / or linear displacement distance). In some instances, the work converter 110 may be further configured to convert rotational motion into linear motion.

[0056] The work converter 110 includes a work input 112 and a work output 114. The work input 112 is configured to receive an input force applied over a first displacement distance. The first displacement distance may be substantially (e.g., within 10% of, 5% of, 4% of, 3% of, 2% of, or 1% of) equal to the displacement of the control 108. The work output 114 is configured to output an output force over a second displacement distance, the second displacement distance beingdifferent from (e.g., greater than) the first displacement distance. In other words, the work converter 110 is configured to convert the input force applied over the first displacement distance (or the work input) into the output force applied over the second displacement distance. Such a configuration allows the first displacement distance to be less than the second displacement distance. The second displacement distance may be substantially (e.g., within 10% of, 5%, of, 4% of, 3% of, 2% of, or 1% of) equal to the displacement distance of the bidirectional linear actuator 106 when transitioning between the extended and retracted positions. As such, the work converter 110 may, in some instances, be generally described as being configured to generate an output displacement that is greater than an input displacement, the output displacement being used to displace the bidirectional linear actuator 106. For example, the work converter 110 may be configured to receive an input force over a first displacement distance and generate an output force over a second displacement distance that causes the actuator extension body 107 to move relative to the actuator main body 105 of the bidirectional linear actuator 106. In this example, a movement distance of the actuator extension body 107 may be substantially equal to the second displacement distance. The work converter 110 may be incorporated within one or more of the control 108, the work transmitter 104, and / or the bidirectional linear actuator 106. For example, a first portion of the work converter 110 may be included with the input device 102 (e.g., the control 108) and a second portion of the work converter 110 may be included with the bidirectional linear actuator 106. By way of further example, at least a portion of the work converter 110 may be included with the work transmitter 104 (e.g., an inline work converter 110 that is separate from the input device 102 and the bidirectional linear actuator 106).

[0057] One example application of the bidirectional linear actuation system 100 may include raising and lowering a seat of a bicycle. In this example, a rider of the bicycle would apply a force to the control 108 (e.g., using a finger such as the thumb), which displaces the control 108. The maximum displacement of the control 108 may be limited by a maximum extension distance of a rider’s thumb. In this example, the rider may be able to raise and lower the seat of the bicycle in response to moving the control 108 with their thumb without the use of any additional external force inputs other than the force generated by the thumb. However, the rider may desire a seat displacement that is greater than the displacement of the control 108. As such, the work converter 110 can be configured to convert the input displacement distance into a greater output displacement distance. Therefore, the displacement distance of the control 108 is less than thechange in height of the bicycle seat. The maximum displacement distance of the bicycle seat per actuation of the control 108 may be constrained by an amount of force a rider is able to consistently apply to the control 108. For example, the work converter 110 may require the input force to increase as the displacement of the bicycle seat increases. Since the work required to move the bicycle seat is generated by the rider (e.g., instead of by an external source such as compressed air), the rider is able to continually adjust the seat height for so long as the rider is able to input the required work.

[0058] FIG. 2 shows a perspective view of a bicycle 200 having a seat 202 in a lowered position and FIG. 3 shows the bicycle 200 having the seat 202 in a raised position. The seat 202 is coupled to a bidirectional linear actuator 204, which is an example of the bidirectional linear actuator 106 of FIG. 1. The bidirectional linear’ actuator 204 is configured to transition between a retracted (FIG. 2) and an extended (FIG. 3) position to transition the seat between the lowered and raised position. In some instances, the bidirectional linear actuator 204 may be configured to have one or more intermediary positions between the extended and retracted positions such that the seat 202 has one or more intermediary positions between the raised and lowered positions.

[0059] The bidirectional linear actuator 204 is configured to be actuated by a remote control interface 206. The remote control interface 206 is remote from the bidirectional linear actuator 204 and may be coupled to a handle bar 208 of the bicycle 200. Being coupled to the handle bar 208 may allow for easy access to the remote control interface 206 by a rider of the bicycle 200. Such a configuration may allow for easy movement of the seat 202 between the lowered and raised positions while the rider is using the bicycle 200 (e.g., on a trail). A work transmitter 210 connects the remote control interface 206 with the bidirectional linear actuator 204 such that an input force at the remote control interface 206 is transmitted to the bidirectional linear actuator 204 via the work transmitter 210. The work transmitter 210 may include one or more of hydraulic lines and / or cables.

[0060] As shown, the bidirectional linear actuator 204 is partially received within a frame 212 of the bicycle 200. The frame 212 may include a seat post clamp 213 configured to releasably couple the bidirectional linear’ actuator 204 to the frame 212. At least a portion of the work transmitter 210 may be routed within the frame 212 (e.g., to connect to the bidirectional linear actuator 204). The frame 212 is further configured to couple to a plurality of wheels 214 and a plurality of pedals 216. The plurality of wheels 214 and the plurality of pedals 216 are rotatable relative to the frame212. The plurality of pedals 216 are configured to drive one of the plurality of wheels 214 via a drive train 218 (c.g., a chain or a belt) that is configured to transfer rotational motion of the plurality of pedals 216 to one of the plurality of wheels 214. In some instances, at least one of the plurality of wheels may be configured to be at least partially and / or selectively driven by an electric motor. For example, the electric motor may provide assistance to the rider when moving the pedals 216 and / or be used as the sole source of power for moving the bicycle 200.

[0061] FIG. 4 shows a perspective top view of the remote control interface 206 when the seat is in the lowered position and FIG. 5 shows a top perspective view of the remote control interface 206 when the seat is in the raised position.

[0062] As shown, the remote control interface 206 includes a control housing 400, a bar mount 402 coupled to the control housing 400 and configured to couple to the handle bar 208 (FIG. 2), a retract cable 406, an extend cable 408, a first control 410 movable relative to the control housing 400, and a second control 412 movable relative to the control housing 400. The retract cable 406 and the extend cable 408 may, for example, each include a cable housing and a wire moveable within the cable housing. By way of further example, the retract cable 406 and the extend cable 408 may each include a wire, wherein each wire is housed in a single cable housing. In this example, the cable housing may include internal sleeves extending about respective wires, wherein the internal sleeves may be made of a low-friction material (e.g., polytetrafluoroethylene).

[0063] In some instances, the retract cable 406 and the extend cable 408 may be formed of the same continuous cable, wherein each distal end of the continuous cable is coupled to either the remote control interface 206 or the bidirectional linear actuator 204 (FIG. 2). In these instances, only a single cable may be used to cause the bidirectional linear actuator 204 to move towards both the retracted position and the extended position.

[0064] The first and second controls 410 and 412 are shown as levers being configured to move rotationally relative to the control housing 400. In some instances, the remote control interface 206 can be configured such that remote control interface 206 alternates between applying a retract force to the retract cable 406 and an extend force to the extend cable 408 in response to a movement of the controls 410 and 412.

[0065] With reference to FIG. 4, the first control 410 is in an activation position and the second control 412 is in an activated position. To transition the first control 410 from the activation position to an activated position (FIG. 5), a force is applied to the first control 410, causing thefirst control 410 to rotate to the activated position. As the first control 410 rotates to the activated position, the second control 412 is caused to rotate towards an activation position (FIG. 5). Once the first control 410 is in the activated position, application of a force to the second control 412 causes the second control 412 to rotate towards the activated position while the first control 410 rotates back to the activation position. In other words, rotation of one of the first or second controls 410 or 412 from the activation position resets the other of the first or second controls 410 or 412 to the activation position.

[0066] Movement of the first and second controls 410 and 412 results in one of the extend and retract cables 408 and 406 being drawn into the remote control interface 206 and the other of the extend and retract cables 408 and 406 being withdrawn from the remote control interface 206. A length of the extend or retract cable 408 or 406 drawn into the remote control interface 206 may be substantially (e.g., within 10% of, 5%, of, 4% of, 3% of, 2% of, or 1% of) equal to an extension distance of the bidirectional linear actuator 204 (and / or the second displacement distance of the work converter 110 of FIG. 1).

[0067] Movement of the first control 410 from the activation position to the activated position causes the extend cable 408 to be drawn into the control housing 400. As the extend cable 408 is drawn into the control housing 400, the retract cable 406 is caused to be withdrawn from the control housing 400 (causing the second control 412 to rotate to the activation position, resetting the second control 412) and the extend cable 408 exerts a force on the bidirectional linear actuator 204 (FIG. 2). In other words, drawing the extend cable 408 into the control housing 400 resets the retract cable 406 while actuating the bidirectional linear actuator 204. The force exerted on the bidirectional linear' actuator 204 causes the bidirectional linear actuator 204 to transition to the extended position, moving the seat 202 (FIG. 2) to the raised position.

[0068] Movement of the second control 412 from the activation position to the activated position causes the retract cable 406 to be drawn into the control housing 400. As the retract cable 406 is drawn into the control housing 400, the extend cable 408 is caused to be withdrawn from the control housing 400 (causing the first control 410 to rotate to the activation position, resetting the first control 410) and the retract cable 406 exerts a force on the bidirectional linear actuator 204. In other words, drawing the retract cable 406 into the control housing 400 resets the extend cable 408 while actuating the bidirectional linear actuator 204. The force exerted on the bidirectionallinear actuator 204 causes the bidirectional linear actuator 204 to transition to the retracted position, moving the scat 202 to the lowered position.

[0069] In some instances, movement of the first and second controls 410 and 412 may cause the bidirectional linear actuator 204 to move to one or more intermediary positions. In these instances, the first and second controls 410 and 412 may interact with, for example, a ratcheting mechanism or a clutch mechanism to allow the first and second controls 410 and 412 to return to the activation position without having a force exerted on the extend cable 408 or the retract cable 406. When at an intermediary position the bidirectional linear’ actuator may be locked (e.g., able to support a weight of the rider) or unlocked (e.g., unable to support a weight of the rider).

[0070] FIG. 6 shows an exploded view of the remote control interface 206. As shown, the control housing 400 includes an upper housing 600 and a lower housing 602, which, when coupled together, enclose at least a portion of the first and second controls 410 and 412 in a cavity formed between the upper and lower housings 600 and 602. The first and second controls 410 and 412 may generally be described as forming part of a spooling assembly 604 within the control housing 400. As such, in some instances, the remote control interface 206 may generally be described as including a spooling assembly 604 that includes the first and second controls 410 and 412. In addition to the first and second controls 410 and 412, the spooling assembly 604 may include a control axle 606 about which the first and second controls 410 and 412 rotate and a control pulley 608 configured to act on the retract cable 406 (FIG. 4) and the extend cable 408 (FIG. 4) in response to rotational movement of the first and second controls 410 and 412. In some instances, the housing 400 may be configured to cooperate with the spooling assembly 604 to encourage the extend and retract cables 408 and 406 to remain in engagement with the spooling assembly 604 during use (e.g., by discouraging the cables 406 and 408 from disengaging the control pulley 608).

[0071] FIG. 7 shows an exploded view of the spooling assembly 604. As shown, the first control 410 includes a first input end 700 and a first output end 702 and the second control 412 includes a second input end 704 and a second output end 706. The first output end 702 includes a first cable guide 708 and the second output end 706 includes a second cable guide 710. The first and second cable guides 708 and 710 are configured to receive a portion of a corresponding cable 712 or 714. At least a portion of one or more of the cables 712 and / or 714 may be routed internally (e.g., through one or more channels) within the control pulley 608 and coupled to the control pulley 608.In some instances, one or more of the cables 712 and 714 may be coupled to (or form part of) a corresponding one of the retract cable 406 or the extend cable 408.

[0072] For example, FIG. 7A shows an example in which each of the cables 712 and 714 form part of a corresponding one of the retract cable 406 or the extend cable 408 and are routed through a control pulley 750 (which is an example of the control pulley 608). As shown, the control pulley 750 includes a first retract channel 752, a first extend channel 754, a central channel 756, a second retract channel 758, and a second extend channel 760. The retract cable 406 is configured to extend through the first retract channel 752 into the central channel 756 to extend through the second retract channel 758 to connect to the second control 412. The extend cable 408 is configured to extend through the extend channel 754 into the central channel 756 to extend through the second extend channel 760 to connect to the first control 410. In this example, the extend and retract cable 408 and 406 may be formed from a single cable routed through the control pulley 750.

[0073] Returning to FIG. 7, each cable 712 and 714 is configured to cooperate with the control pulley 608 to cause the control pulley 608 to rotate in response to one of the first or second controls 410 or 412 being transitioned from the activation position to the activated position. As shown, the control pulley 608 includes an extend pulley segment 716, a retract pulley segment 718, and an actuator pulley segment 720. The actuator pulley segment 720 may be disposed between the extend pulley segment 716 and the retract pulley segment 718. However, other configurations are possible. For example, and as shown in FIG. 7B, one of the extend pulley segment 716 or the retract pulley segment 718 is disposed between the actuator pulley segment 720 and the other of the extend pulley segment 716 or the retract pulley segment 718.

[0074] The extend pulley segment 716 includes an extend cable guide 722. The extend cable guide 722 is configured to receive a portion of the cable 712. As the first control 410 is transitioned to the activated position, a portion of the cable 712 is unwrapped from the extend cable guide 722 and a portion of the cable 712 is wrapped along the first cable guide 708, which results in the control pulley 608 rotating in a first pulley rotation direction.

[0075] The retract pulley segment 718 includes a retract cable guide 724 (shown schematically in hidden lines). The retract cable guide 724 is configured to receive a portion of the cable 714. As the second control 412 is transitioned to the activated position, a portion of the cable 714 is unwrapped from the retract cable guide 724 and a portion of the cable 714 is wrapped along the second cable guide 710, which results in the control pulley 608 rotating in a second pulley rotationdirection, the second pulley rotation direction being different than the first pulley rotation direction.

[0076] The actuator pulley segment 720 includes an actuation cable guide 726 configured to receive a portion of the extend cable 408 (FIG. 4) and the retract cable 406 (FIG. 4). As the control pulley 608 is rotated in either the first or second pulley rotation direction, one of the extend cable 408 or the retract cable 406 wraps along the actuation cable guide 726 while the other of the extend cable 408 or the retract cable 406 unwraps from the actuation cable guide 726. As the retract cable 406 or the extend cable 408 wrap along the actuation cable guide 726, the cable 406 or 408 being wrapped exerts a force on the bidirectional linear actuator 204 (FIG. 2) that causes the bidirectional linear actuator 204 to move from the extended position or the retracted position and towards the other of the extended position or the retracted position.

[0077] As shown, the extend pulley segment 716 has a first segment diameter 728, the retract pulley segment 718 has a second segment diameter 730, and the actuator pulley segment 720 has a third segment diameter 732. The first and second segment diameters 728 and 730 are smaller than the third segment diameter 732. As such, for example, as the first control 410 is transitioned to the activated position, a length of the cable 712 unwrapped from the extend pulley segment 716 is less than a length of the extend cable 408 wrapped around the actuator pulley segment 720. Similarly, in this example, as the second control 412 is transitioned to the activated position, a length of the cable 714 unwrapped from the retract pulley segment 718 is less than a length of the retract cable 406 wrapped around the actuator pulley segment 720. As such, the spooling assembly 604 is one example of the work converter 110 of FIG. 1. In some instances, the first and second segment diameters 728 and 730 may be the same. In other instances, the first and second segment diameters 728 and 730 may be different.

[0078] As further shown, the control axle 606 extends from a rotation plate 734, wherein the rotation plate 734 includes a rotation receptacle 736 within which the control pulley 608 rotates. The rotation receptacle 736 may be spaced apart from the control axle 606. However, other configurations may be possible (e.g., the rotation receptacle 736 and the control axle 606 may be arranged to be substantially colinear). The control axle 606 and the rotation receptacle 736 may be configured to align the extend cable guide 722 with the first cable guide 708 and the retract cable guide 724 with the second cable guide 710.

[0079] While the control pulley 608 is shown as having three segments 716, 718, and 720, other configurations arc possible. In some instances, the control pulley 608 may have only two segments. For example, the cables 712 and 714 may wrap and unwrap from a common segment (or a first segment) of the control pulley 608 and the extend and retract cables 408 and 406 wrap and unwrap from the actuator pulley segment 720 (or a second segment). In this example, the control pulley 608 has two segments (e.g., a common segment shared by cables 712 and 714 and the actuator pulley segment 720).

[0080] FIG. 8 shows a perspective view of another example of a remote control interface 800, the remote control interface 800 may replace the remote control interface 206 in FIG. 2. The remote control interface 800 includes a first control 802, a second control 804, a first control pulley 806, a second control pulley 808, and a control axle 810 about which the first and second control pulleys 806 and 808 and the first and second controls 802 and 804 rotate. Rotation of the first control 802 causes one of a first cable 812 (e.g., an extend or retract cable) or a second cable 814 (e.g., an extend or retract cable) to wrap about the first or second control pulley 806 or 808 and the other of the first or second cable 812 or 814 to unwrap from the other of the first or second control pulley 806 or 808. In some instances, the first and second cables 812 and 814 may be coupled together or formed from a single common cable.

[0081] The first control 802 and the second control 804 may be biased (e.g., using a spring such as a torsion spring) towards the activation position such that after being transitioned to the activated position the bias force urges the controls 802 and 804 to the activation position. The first and second controls 802 and 804 may be indexed such the first and second controls 802 and 804 may be actuated multiple successive times before, for example, bidirectional linear actuator 204 (FIG. 2) reaches the extended position. Such a configuration may allow the seat 202 (FIG. 2) to have one or more intermediary positions between the raised and the lowered position. For example, the remote control interface 800 may include a ratcheting mechanism configured to enable to incremental wrapping and unwrapping of a corresponding one of the first and second cables 812 and 814.

[0082] In some instances, a housing (not shown) may enclose one or more components of the remote control interface 800. Inclusion of a housing may encourage the first and second cable 812 and 814 to remain wrapped around a respective control pulley 806 or 808 during use.

[0083] FIG. 9 shows an exploded perspective view of the remote control interface 800. As shown, the first and second control pulleys 806 and 808 cooperate with a plurality of pawls 900 to form a ratcheting mechanism. The first and second control pulleys 806 and 808 include a plurality of index openings 902 for selectively receiving a corresponding pawl 900.

[0084] Rotation of the first control 802 towards an activated position causes pawls 900a to engage corresponding index openings 902 in the first control pulley 806, causing the first control pulley 806 to rotate. After reaching the activated position, rotation of the first control 802 towards an activation position (e.g., as the result of a biasing force generated by a spring) causes the pawls 900a to move out of engagement with the index openings 902 of the first control pulley 806 without causing a corresponding movement in the first control pulley 806. Subsequent rotation of the first control 802 towards the activated causes further rotation of the first control pulley 806.

[0085] Rotation of the second control 804 towards an activated position causes pawls 900b to engage corresponding index openings 902 in the second control pulley 808, causing the second control pulley 808 to rotate. After reaching the activated position, rotation of the second control 804 towards an activation position (e.g., as the result of a biasing force generated by a spring) causes the pawls 900b to move out of engagement with the index openings 902 of the second control pulley 808 without causing a corresponding movement in the second control pulley 808. Subsequent rotation of the second control 804 towards the activated position causes further rotation of the second control pulley 808.

[0086] The pawls 900a and 900b are configured to not interfere with the unwrapping of the first or second cable 812 and 814 from a corresponding control pulley 806 or 808 in response to the first or second control 802 or 804 rotating to the activated position. As such, advancing the first control 802 towards the activated position causes one of the first or second cable 812 or 814 to unwrap from the second control pulley 808 while the other of the first or second cable 812 or 814 wraps around the first control pulley 806. Similarly, advancing the second control 804 towards the activated position causes one of the first or second cable 812 or 814 to unwrap from the first control pulley 806 while the other of the first or second cable 812 or 814 wraps around the second control pulley 808. In this manner, each rotation of the first or second controls 802 or 804 towards the activated position partially resets the other of the first or second controls 802 or 804.

[0087] FIG. 10 shows another example of a remote control interface 1000 coupled to a handle bar 1002 (which is an example of the handle bar 208 of FIG. 2), the remote control interface 1000 mayreplace the remote control interface 206 in FIG. 2. As shown, the remote control interface 206 includes a control 1004 configured to rotate about a gripping axis 1006 of the handle bar 1002. The gripping axis 1006 being the axis about which a rider’s hand wraps around when gripping the handle bar 1002. The control 1004 is rotatable in both directions to wrap a first cable 1008 (e.g., an extend or retract cable) about a control pulley 1010 while unwrapping a second cable 1012 (e.g., an extend or retract cable) from the control pulley 1010 and to wrap the second cable 1012 about the control pulley 1010 while unwrapping the first cable 1008 from the control pulley 1010. In some instances, the control 1004 may be generally be described as a twist grip control.

[0088] In some instances, a housing (not shown) may enclose one or more components of the remote control interface 1000. Inclusion of a housing may encourage the first and second cable 1008 and 1012 to remain wrapped around the control pulley 1010 during use. In some instances, the first and second cables 1008 and 1012 may be coupled together or formed from a single common cable.

[0089] FIG. 11 shows an exploded view of the remote control interface 1000. As shown, the remote control interface 1000 includes a bar mount 1100 configured to couple the remote control interface 1000 to the handle bar 1002 (FIG. 10) and a control axle 1102. The control 1004 is configured to rotatably couple to the control axle 1102 such that the control 1004 rotates relative to the bar mount 1100. As shown, the control axle 1102 includes flanges 1104 and 1106 at opposing distal ends of the of the control axle 1102. The flanges 1104 and 1106 are configured to rotatably couple the control 1004 to the bar mount 1100.

[0090] The control pulley 1010 is configured to rotate with the control 1004. For example, the control pulley 1010 can be coupled to the control 1004. For example, the control pulley 1010 may be directly coupled to the control 1004. In this example, the control 1004 and the control pulley 1010 rotate together in a one-to-one configuration (e.g., one complete rotation of the control 1004 causes one complete rotation of the control pulley 1010). The relative sizes of the control pulley 1010 and the control 1004 may be adjusted such that the control pulley 1010 and control 1004 are an example of the work converter 110 of FIG. 1. However, other configurations are possible. For example, at least a portion of the work converter 110 may be included with the bidirectional linear actuator 204 (FIG. 2).

[0091] FIG. 12 shows an example of the remote control interface 1000 that includes a geartrain 1200 disposed between the control 1004 and control pulley 1010. The geartrain 1200 is configuredto transfer rotational motion of the control 1004 to the control pulley 1010. The geartrain 1200 can be configured such that, when the control 1004 is rotated through a first rotation angle, the control pulley 1010 rotates through a second rotation angle, the second rotation angle being greater than the first. Alternatively, the geartrain 1200 can be configured such that first rotation angle is greater than the second rotation angle, to increase an output force. As shown, the geartrain 1200 can be a planetary geartrain including a ring gear 1202, a plurality of planet gears 1204, and a sun gear 1206. The geartrain 1200 (e.g., planetary) may be configured to generate a greater output force or a greater output displacement (e.g., in the form of cable wrap), relative to the input. As such, the geartrain 1200 may form part of the work converter 110 of FIG. 1.

[0092] FIG. 13 shows another example of a remote control interface 1300 that may replace the remote control interface 206 in FIG. 2. As shown, the remote control interface 1300 includes a first control 1302 and a second control 1304. The first control 1302 includes a first actuation end 1305 and a first pulley end 1308. A first pulley 1310 is rotatably coupled to the first control 1302 at the first pulley end 1308. The first pulley 1310 is configured to engage a first cable 1312 (e.g., an extend or retract cable). The second control 1304 includes a second actuation end 1311 and a second pulley end 1314. A second pulley 1316 is rotatably coupled to the second control 1304 at the second pulley end 1314. The second pulley 1316 is configured to engage a second cable 1318 (e.g., an extend or retract cable). In some instances, the first and second cables 1312 and 1318 may be coupled together or formed from a single common cable.

[0093] The first and second controls 1302 and 1304 are pivotally coupled to each other at a pivot point 1320. As shown, the first and second controls 1302 and 1304 extend transverse to each other and cross at the pivot point 1320. As such, the first and second controls 1302 and 1304 may generally be described as forming a scissor mechanism. In the example shown, transitioning the first control 1302 from the activation position to the activated position, exerts a force on the first cable 1312 and causes the second control 1304 to transition from the activated position to the activation position (e.g., as a result of a force being exerted on the second cable 1318). As such, transitioning the first and second controls 1302 and 1304 between the activation and activated positions, causes the first and second cable 1312 and 1318 to be displaced. The remote control interface 1300 may be an example of the work converter 110 of FIG. 1. For example, the pivot point 1320 may be positioned such that the first and second pulley ends 1308 and 1314 experience a greater displacement distance than the first and second actuation ends 1305 and 1311, resultinga greater displacement of the cables 1312 and 1318. Additionally, or alternatively, the first and second pulleys 1310 and 1316 can be configured to increase a displacement distance of the cables 1312 and 1318.

[0094] In some instances, a housing (not shown) may enclose one or more components of the remote control interface 1300. Inclusion of a housing may encourage the first and second cable 1312 and 1318 to remain wrapped around a respective control pulley 1310 or 1316 during use.

[0095] FIG. 14 shows a perspective view of the bidirectional linear actuator 204 in the retracted position and FIG. 15 shows a perspective view of the bidirectional linear actuator 204 in the extended position. As shown, the bidirectional linear actuator 204 includes a main body 1400 and an extension body 1402. The main body 1400 is configured to be at least partially received within the frame 212 (FIG. 2). When received within the frame 212, the main body 1400 is configured to be coupled to the frame 212. For example, the seat post clamp 213 (FIG. 2) may be configured to selectively exert a clamping force on the main body 1400 to couple the main body 1400 to the frame.

[0096] The extension body 1402 is telescopically received within the main body 1400 and configured to move relative to the main body 1400. Alternatively, the main body 1400 may be telescopically received within the extension body 1402, wherein the main body 1400 is configured to move relative the extension body 1402. As such, the main body 1400 and the extension body 1402 may be generally described as being configured to cooperate telescopically.

[0097] The extension body 1402 is configured to move between an extended position and a retracted position. Movement of the extension body 1402 transitions the seat 202 (FIG. 2) between the raised and lowered positions. As such, the extension body 1402 is configured to extend and retract from the main body 1400 as the bidirectional linear actuator 204 is transitioned between the extended and retracted positions. For example, and as shown, when a force is exerted on the extend cable 408, the extension body 1402 is caused to extend from the main body 1400 until the bidirectional linear actuator 204 is in the extended position. In this example, and as shown, when a force is exerted on the retract cable 406, the extension body 1402 is caused to retract towards (e.g., into) the main body 1400 until the bidirectional linear actuator 204 is in the retracted position. As such, alternating between applying a tension force to the extend and retract cables 408 and 406 causes the extension body 1402 to alternate between extending from and retracting towards (e.g., into) the main body 1400.

[0098] FIG. 16 shows an exploded view of the bidirectional linear actuator 204. As shown, the bidirectional linear actuator 204 includes a mechanical actuator 1600 (shown in a position corresponding to when the bidirectional linear actuator 204 is in the retracted position) configured to be received within the main body 1400 and to cause the extension body 1402 to move relative to the main body 1400. The extension body 1402 can be configured to receive at least a portion of the actuator 1600. For example, the extension body 1402 may include an actuator cavity 1601 within which the actuator 1600 extends.

[0099] The actuator 1600 includes a shuttle 1602 and an actuation shaft 1604. The shuttle 1602 is configured to move along a shaft longitudinal axis 1603 of the actuation shaft 1604 in response to a tension force being applied to the extend or retract cable 408 or 406. The shuttle 1602 is configured to engage the extension body 1402 such that movement of the shuttle 1602 along the actuation shaft 1604 causes the extension body 1402 to move. For example, the shuttle 1602 may be coupled to the extension body 1402. In some instances, a length of the actuation shaft 1604 may be adjustable. For example, a rider may add one or more spacers to the actuation shaft 1604, increasing the length of the actuation shaft 1604.

[0100] FIG. 17 shows a perspective view of the actuator 1600 of FIG. 16. As shown, the shuttle 1602 is configured to couple to each of the extend and retract cables 408 and 406 such that, when under tension, the extend cable 408 applies an extension force in an extend direction 1700 to the shuttle 1602 and, when under tension, the retract cable 406 applies a retract force in a retract direction 1702 to the shuttle 1602. The extend direction 1700 is opposite the retract direction 1702. Such a configuration allows the extend and retract cables 408 and 406 to move the shuttle 1602 along the actuation shaft 1604. The movement distance of the shuttle 1602 along the actuation shaft 1604 may be substantially equal to a length of the extend or retract cable 408 or 406 that is drawn into the work converter (e.g., of the remote control interface 206). In some instances, the extend direction 1700 and the retract direction may be opposite and colinear.

[0101] The shuttle 1602 may include a cable connector 1704 to couple to the extend and retract cables 408 and 406 (e.g., by engaging a cable crimp at a distal end of the cables 406 and 408, using a screw to capture the cables 406 and 408, and / or the like). The cable connector 1704 may be configured such that the extend cable 408 extends from the cable connector 1704 along the extend direction 1700 and the retract cable 406 extends from the cable connector 1704 along the retract direction 1702.

[0102] As shown, the actuator 1600 may further include an actuator pulley assembly 1706 coupled at a first distal end 1708 of the actuation shaft 1604. The actuator pulley assembly 1706 includes a pulley mount 1710 configured to couple to the actuation shaft 1604 and an actuator pulley 1712 rotatably coupled to the pulley mount 1710. As shown, the extend cable 408 extends about the actuator pulley 1712 such that the extend cable 408 is able to apply the extend force in the extend direction 1700.

[0103] FIG. 18 shows an exploded perspective view of the actuator 1600. As shown, the shuttle 1602 includes a shuttle housing 1800, a latching assembly 1802, and a closure cap 1804. The shuttle housing 1800 includes a shuttle housing cavity 1806 configured to receive at least a portion of the latching assembly 1802 and at least a portion of the closure cap 1804. When assembled, the closure cap 1804 cooperates with the shuttle housing 1800 to retain the latching assembly 1802 within the shuttle housing cavity 1806. The latching assembly 1802 may be generally described as forming at least a portion of an example of a mechanical index assembly configured to retain the bidirectional linear actuator 204 (FIG. 2) at one or more positions.

[0104] The latching assembly 1802 includes a latching body 1808, a retract latch 1810, an extend latch 1812, and a latch spacer 1814. The latch spacer 1814 extends between the retract and extend latches 1810 and 1812 such that, when assembled, the retract latch 1810 is spaced apart from the extend latch 1812 along the shaft longitudinal axis 1603 of the actuation shaft 1604. The retract latch 1810 is configured to be received within a retract catch 1816 of the actuation shaft 1604 when the bidirectional linear actuator 204 is in the retracted position. The extend latch 1812 is configured to be received within an extend catch 1818 of the actuation shaft 1604 when the bidirectional linear actuator 204 is in the extended position. In other words, each latch 1810 and 1812 is configured to cooperate with a corresponding catch 1816 or 1818 to retain (or lock) the bidirectional linear actuator 204 in the extended or retracted position. The extend catch 1818 and the retract catch 1816 are at opposing ends of the actuation shaft 1604. In some instances additional catches (and / or latches) may be provided to retain the bidirectional linear actuator 204 in one or more intermediary positions between the extended and retracted positions. For example, an additional catch may be disposed at a mid-position along the actuation shaft 1604. In this example, the shuttle housing 1800 may be configured to receive an additional latch and an additional latch spacer, wherein the additional latch spacer is disposed between the additional latch and one of the extend and retract latches 1812 and 1810. In use, the additional latch is configuredto engage the additional catch. Inclusion of one or more intermediary positions may allow for intermediate user positions and / or for increasing a maximum extension distance (c.g., by allowing the maximum extension distance to be reached after two or more actuations of the remote control interface 206 of FIG. 2).

[0105] FIG. 18 shows the retract latch 1810 in a retention position, which retains the bidirectional linear actuator 204 in the retracted position, and the extend latch 1812 in a release position. The retract latch 1810 is maintained within the retention position by the latching body 1808 and the extend latch 1812 is maintained in the release position by a slide body 1820 of the actuation shaft 1604, the slide body 1820 extending between the catches 1816 and 1818.

[0106] When the retract latch 1810 is in the retention position, the latching body 1808 can be disposed over the retract latch 1810, preventing the retract latch 1810 from transitioning to the release position. To allow the retract latch 1810 to transition from the retention position to the release position, the latching body 1808 can be moved within the shuttle housing 1800 to be disposed between the extend latch 1812 and the retract latch 1810. Movement of the latching body 1808 is caused by the extend cable 408 or the retract cable 406 exerting a force on the latching body 1808. For example, and as shown, the latching body 1808 includes the cable connector 1704, which allows the cables 406 and 408 to exert a force on the latching body 1808.

[0107] When the latching body 1808 is disposed between the retract latch 1810 and the extend latch 1812, the retract latch 1810 is able to move in a direction outwardly from the shaft longitudinal axis 1603 (e.g., expand). When the latching body 1808 is between the retract and extend latch 1810 and 1812, the latching body 1808 is able to exert a force on the shuttle housing 1800, causing the shuttle housing 1800 to move. Movement of the shuttle housing 1800 causes the retract latch 1810 to be urged outwardly (e.g., expand) and out of engagement with the retract catch 1816 such that retract latch 1810 moves along the slide body 1820.

[0108] When the extend latch 1812 reaches the extend catch 1818, the extend latch 1812 moves into the extend catch 1818 (e.g., contracts). The extend latch 1812 is urged into the extend catch 1818 by the latching body 1808 and, as the extend latch 1812 moves into the extend catch 1818, the latching body 1808 moves over the extend latch 1812. Once the latching body 1808 is disposed over the extend latch 1812, the extend latch 1812 is retained within the extend catch 1818.

[0109] FIGS. 19-21 show a cross-sectional view of the actuator 1600 taken at the region XIX of FIG. 17, wherein the extend latch 1812 is shown transitioning out of the extend catch 1818. Asshown in FIG. 19, the latching body 1808 extends over the extend latch 1812, retaining the extend latch 1812 in the extend catch 1818. As shown in FIG. 20, the retract cable 406 has exerted a force on the latching body 1808 causing the latching body 1808 to move (e.g., slide) along the latch spacer 1814. In other words, the latching body 1808 is caused to move within the shuttle housing 1800. As the latching body 1808 moves along the latch spacer 1814, the latching body 1808 moves to a position in which the latching body 1808 does not extend over the extend latch 1812. As shown in FIG. 21, after the latch body 1808 has moved to a position in which the latching body 1808 does not extend over the extend latch 1812 further movement of the latching body 1808 along the latch spacer 1814 is prevented. For example, and as shown, the latching body 1808 may come into engagement (e.g., direct contact) with the retract latch 1810. The closure cap 1804 may prevent linear movement of the retract latch 1810 such that a force exerted on the latching body 1808 by the retract cable 406 causes the shuttle 1602 to move along the actuation shaft 1604 towards the retract catch 1816 (FIG. 18).

[0110] FIGS. 22-24 show a cross-sectional view of the actuator 1600 taken at the region XXII of FIG. 17, wherein the retract latch 1810 is shown transitioning into the retract catch 1816. As shown in FIG. 22, the latching body 1808 is disposed between the extend latch 1812 and the retract latch 1810 such that the latching body 1808 exerts a force on the retract latch 1810 in response to a force being applied to the latching body 1808 by the retract cable 406. The force exerted on the retract latch 1810 causes the shuttle 1602 to move along the actuation shaft 1604 towards the retract catch 1816. As shown in FIG. 23, movement of the shuttle housing 1800 along the actuation shaft 1604 towards the retract catch 1816 is eventually prevented by a retract shuttle stop 2200. For example, the extension body 1402 (FIG. 14) may come into contact with the retract shuttle stop 2200 and, because the shuttle 1602 is coupled with the extension body 1402, further movement of the shuttle 1602 is prevented. The retract shuttle stop 2200 is positioned such that the retract latch 1810 is capable of being received in the retract catch 1816. The retract shuttle stop 2200 may be further configured to couple the actuator 1600 to the main body 1400 (FIG. 14), allowing the extension body 1402 (FIG. 14) to move relative to the main body 1400. As such, and as shown in FIG. 24, continued exertion of the retract force causes the latching body 1808 to move within the shuttle housing 1800 and along the latch spacer 1814, which urges the retract latch 1810 into the retract catch 1816. As the retract latch 1810 is urged into the retract catch 1816, the latching body 1808 moves to extend over the retract latch 1810.

[0111] When transitioning from the retract position to the extend position, a similar process as discussed in relation to FIGS. 19-24 occurs. That is, the latching body 1808 moves out of engagement with the retract latch 1810, into engagement with the extend latch 1812, the engagement with the extend latch 1812 urges the shuttle 1602 along the actuation shaft 1604 until the shuttle housing 1800 engages an extend shuttle stop 1900 (FIG. 19), the latching body 1808 continues to move until the extend latch 1812 is urged into the extend catch 1818, and the latching body 1808 extends over the extend latch 1812. The latching body 1808 may be retained in a position over the extend latch 1812 or the retract latch 1810 by one or more of tension on the extend or retract cable 408 or 406, detents, frictional forces (e.g., as a result of compressive forces, interactions between a wire and cable housing of a respective cable 406 or 408, and / or the like), magnetic coupling, and / or any other form of retention. The extend shuttle stop 1900 may be part of the actuator pulley assembly 1706 (e.g., the pulley mount 1710) (FIG. 17).

[0112] With reference to FIG. 25 each of the extend and retract latches 1812 and 1810 may include a plurality latch bodies 2500. As shown, each latch body 2500 has an arcuate shape. For example, the arcuate shape of each latch body 2500 may be configured such that an inner arc of each latch body 2500 generally corresponds to a curvature of the at least a portion of the actuation shaft 1604 (FIG. 16). For example, the arcuate shape of each latch body 2500 may generally correspond to a curvature (e.g., a smallest curvature of a surface configured to engage the latch body 2500) of the latch catches 1816 and 1818 (FIG. 18).

[0113] As shown in FIG. 25, one or more of the inner edges 2502 and one or more of the outer edges 2504 of the latch body 2500 may include a bevel (or chamfer). A bevel (or chamfer) on the outer edge 2504 may be configured to cooperate with the latching body 1808 to encourage the latch body 2500 to move into a corresponding latch catch 1816 or 1818. For example, the bevel (or chamfer) may be in a range of 25° and 65° (e.g., 45°). Such a configuration, may encourage the latch body 2500 to move linearly along the actuation shaft 1604 (FIG. 16) and radially inwardly into the corresponding latch catch 1816 or 1818.

[0114] While the plurality of latch bodies 2500 are shown as being arcuate bodies that extend around at least a portion of the actuation shaft 1604, other configurations are possible. For example, in FIG. 25 A, the latch bodies 2500 are shown as being spherical bodies. In some instances, spherical bodies may cause and / or be susceptible to additional wear as a result of a force concentration at the point of contact between the spherical body and the actuation shaft 1604.

[0115] FIG. 26 shows a perspective view of the latching body 1808. As shown, the latching body 1808 may be a generally (c.g., within 10% of, 5% of, 4% of, 3% of, 2% of, or 1% of) cylindrical body from which the cable connector 1704 extends. However other shapes may be possible (e.g., rectangular, ovular, and / or any other shape). The cable connector 1704 includes a connector cavity 2600 having a cavity open end 2602 and a plurality of slots 2604. As shown, at least two slots 2604 are disposed on opposing ends of the cable connector 1704 and are configured such that a corresponding one of the extend or retract cable 408 or 406 (FIG. 4) can extend through the slots 2604 and into the connector cavity 2600.

[0116] As further shown, the latching body 1808 includes a latching body cavity 2606 that extends from a retract open end 2608 to an extend open end 2610. The latching body cavity 2606 is configured such that the latching body 1808 is linearly movable along at least a portion of the latch spacer 1814 (FIG. 18). Each open end 2608 and 2610 may include a latching body beveled (or chamfered) edge 2612. Each latching body beveled (or chamfered) edge 2612 is configured to cooperate with a corresponding outer edge 2504 (FIG. 25) of one or more latch bodies 2500 (FIG. 25). When the outer edge 2504 of the latch body 2500 is beveled (or chamfered), the latching body beveled (or chamfered) edge 2612 can be configured to be a complementary bevel (or chamfer).

[0117] FIG. 27 shows a perspective view of the catches 1816 and 1818. As shown, each catch 1816 and 1818 includes a catch groove 2700 disposed between first and second raised regions 2702 and 2704. The catch groove 2700 may include one or more beveled (or chamfered) groove edges 2706. For example, the catch groove 2700 may include a bevel (or chamfer) on opposing groove edges 2706. A beveled (or chamfered) groove edge 2706 may be configured to cooperate with a corresponding inner edge 2502 (FIG. 25) of one or more latch bodies 2500 (FIG. 25). For example, the beveled (or chamfered) groove edge 2706 may encourage removal of a corresponding latch body 2500 from the catch groove 2700. When the inner edge 2502 of the latch body 2500 is beveled (or chamfered), the beveled (or chamfered) groove edge 2706 may be configured to be a complementary bevel (or chamfer).

[0118] FIG. 28 shows a perspective view of the shuttle housing 1800 and closure cap 1804. As shown, the shuttle housing 1800 includes a shuttle slot 2800 that extends into the shuttle housing cavity 1806 and a shuttle housing open end 2802. The shuttle housing cavity 1806 is configured to receive the latching body 1808 (FIG. 18), the retract latch 1810 (FIG. 18), the extend latch 1812(FIG. 18), and the latch spacer 1814 (FIG. 18). The closure cap 1804 is configured to he at least partially received within the shuttle housing open end 2802 to retain the latching body 1808, the retract latch 1810, the extend latch 1812, and the latch spacer 1814 within the shuttle housing cavity 1806.

[0119] The shuttle slot 2800 is configured such that the latching body 1808 may move within the shuttle slot 2800 when transitioning the latches 1810 and 1812 into and out of corresponding catches 1816 and 1818 (FIG. 18). The shuttle housing cavity 1806 is configured such that each of the latches 1810 and 1812 can expand outwardly a sufficient distance to allow the latches 1810 and 1812 to disengage corresponding catches 1816 and 1818.

[0120] FIGS. 29-32 show an example of a bidirectional linear actuator 2900 which may replace the bidirectional linear actuator 204 in FIG. 2. As shown the bidirectional linear actuator 2900 includes an actuator 2902 having a first fluid reservoir 2904 and a second fluid reservoir 3000 (FIG. 30), wherein the volume of the first and second fluid reservoirs 2904 and 3000 are adjustable. Adjusting the volume of the first and second fluid reservoirs 2904 and 3000 results in the generation of hydrostatic forces, which cause the bidirectional linear actuator 2900 to transition between extended (FIG. 29) and retracted (FIG. 30) positions. As such, the bidirectional linear actuator 2900 may generally be described as a hydraulic bidirectional linear actuator. When the fluid volumes of the first and second fluid reservoirs 2904 and 3000 are no longer being adjusted, the resulting opposing hydrostatic forces prevent further movement of the bidirectional linear actuator 2900 between extended and retracted positions. The opposing hydrostatic forces may generally be described as forming at least a portion of a hydraulic index assembly configured to retain the bidirectional linear actuator 2900 at one or more positions.

[0121] The first and second fluid reservoirs 2904 and 3000 are at least partially defined by a control piston 2906. For example, and as shown, the first and second fluid reservoirs 2904 and 3000 are on opposing sides of the control piston 2906. The first fluid reservoir 2904, the second fluid reservoir 3000, and the control piston 2906 can be configured such that the bidirectional linear actuator 2900 is an example of the work converter 110 of FIG. 1. In these instances, the remote control interface 206 may also be an example of the work converter 110 of FIG. 1 such that the bidirectional linear actuator 2900 and the remote control interface 206 cooperate to convert an input work into an output work, wherein a displacement distance caused by the output work is greater than a displacement distance to generate the input work.

[0122] The volume of the first and second fluid reservoirs 2904 and 3000 can be adjusted using the extend and retract cables 408 and 406. For example, the retract cable 406 can be configured to exert a retract force on the control piston 2906 that causes the control piston 2906 to move in a retract direction 2908. In this example, the extend cable 408 can be configured to exert an extend force on the control piston 2906 that causes the control piston 2906 to move in a extend direction 2910, the extend direction 2910 being opposite the retract direction 2908. While the extend and retract directions 2910 and 2908 are generally shown as extending substantially parallel to an extension / retraction direction of the bidirectional linear’ actuator 2900, other orientations are possible. For example, extend and retracts directions 2910 and 2908 may extend transverse (e.g., perpendicular or non-perpendicular) to the extension / retraction direction of the bidirectional linear actuator 2900.

[0123] A movement distance of the control piston 2906 in the extend or retract directions 2910 or 2908 may be substantially equal to a length of the retract cable 406 or the extend cable 408 that is drawn into a work converter (e.g., of the remote control interface 206 of FIG. 2). The retract force may be applied in a direction that extends substantially parallel to the retract direction 2908 and the extend force may be applied in a direction extends substantially parallel to the extend direction 2910. As shown, a pulley 2912 is coupled to the actuator 2902 such that the control piston 2906 moves relative to the pulley 2912 when the control piston 2906 moves in the extend and retract directions 2910 and 2908. As such, the pulley 2912 may generally be described as reorienting the extend cable 408 such that the extend cable 408 is configured to apply a force to the control piston 2906 in the extend direction 2910.

[0124] With reference to FIG. 29, the bidirectional linear actuator 2900 is in the extended position. When the retract cable 406 applies the retract force to the control piston 2906, the control piston 2906 moves in the retract direction 2908. As shown, while moving in the retract direction 2908, the control piston 2906 moves along a channel guide 2914 towards an end plate 2916. As the control piston 2906 moves towards the end plate 2916, the volume of the first fluid reservoir 2904 decreases and fluid within the first fluid reservoir 2904 is urged along a first fluid flow path 2918.

[0125] The first fluid flow path 2918 extends from the first fluid reservoir 2904 and into a fluid channel 2920 extending within the channel guide 2914. From the fluid channel 2920, the first fluid flow path 2918 intersects a valve 2922, exerting a force on the valve 2922 that causes the valve 2922 to transition from a closed position to an open position. When the valve 2922 is in theopen position, fluid is allowed to flow from an extend column 2924 and into the second fluid reservoir 3000. In addition to intersecting the valve 2922, the first fluid flow path 2918 extends along a first side channel 2926 to intersect a plunger 2928 coupled to an extension shaft 2930. The force exerted by fluid flowing along the first fluid flow path 2918 urges the plunger 2928 to move within the extend column 2924, displacing fluid within a first column region 2932 of the extend column 2924 while adding fluid to a second column region 3002 (FIG. 30) of the extend column 2924. The first and second column regions 2932 and 3002 are disposed on opposing sides of the plunger 2928 and substantially fluidly isolated from each other by the plunger 2928. As such, the plunger 2928 may be configured to sealingly and slidingly engage with the extend column 2924. The fluid displaced from the first column region 2932 moves along a second fluid flow path 3004 (FIG. 30) through the valve 2922 and into the second fluid reservoir 3000. Movement of the extension shaft 2930 corresponds to the bidirectional linear actuator 2900 moving between extended and retracted positions.

[0126] With reference to FIG. 31, after the bidirectional linear actuator 2900 is transitioned to the retracted position, the valve 2922 transitions to the closed position. For example, the valve 2922 may be transitioned to the closed position in response to a rider exerting a force on the extension shaft 2930. In this example, when the rider sits on the seat 202 (FIG. 2) after the bidirectional linear actuator 2900 has transitioned to the retracted position, the resulting fluid pressure within the first column region 2932 of the extend column 2924 causes the valve 2922 to transition to the closed position. In some instances, a biasing mechanism (e.g., a spring) may be provided to urge the valve to the closed position.

[0127] With refence to FIG. 32, the bidirectional linear actuator is in the retracted position. When the extend cable 408 applies the extend force to the control piston 2906, the control piston 2906 moves in the extend direction 2910. Movement of the control piston 2906 in the extend direction 2910 causes fluid to flow along the first and second fluid flow paths 2918 and 3004 in a direction opposite to when the control piston 2906 moves in the retract direction 2908. In other words, fluid is caused to flow along the second fluid flow path 3004 from the second fluid reservoir 3000 and is incident on the valve 2922, causing a first valve portion 3200 to separate from a second valve portion 3202. Movement of the first valve portion 3200 causes the valve 2922 to transition to the open position, allowing fluid to flow along the second fluid flow path 3004 through the valve 2922 and into the first column region 2932 of the extend column 2924. In some instances, dependingon a flow direction, the first and second valve portions 3200 and 3202 move together (see, e.g., FIGS 29-30).

[0128] As fluid enters the first column region 2932, the fluid exerts a force on the plunger 2928, urging the plunger 2928 to move along the extend column 2924. As the plunger 2928 moves along the extend column 2924, fluid within the second column region 3002 is displaced from the second column region 3002 and flows along the first fluid flow path 2918 and into the first fluid reservoir 2904. When the bidirectional linear actuator 2900 is transitioned to the extended position, the valve 2922 transitions to the closed position. For example, the valve 2922 may be transitioned to the closed position in response to a rider exerting a force on the extension shaft 2930. In this example, when the rider sits on the seat 202 (FIG. 2), the resulting fluid pressure within the first column region 2932 of the extend column 2924 causes the valve 2922 to transition to the closed position. Additionally, or alternatively, the valve 2922 may be biased towards the closed position (e.g., using a biasing mechanism such as a spring).

[0129] While the bidirectional linear actuator 2900 is described in the context of transitioning between the extended and retracted positions, the bidirectional linear actuator 2900 can include multiple (e.g., infinite) intermediary positions at which the bidirectional linear actuator 2900 may be stopped. For example, a rider may discontinue exerting a force on the extend and retract cables 408 and 406 while the control piston 2906 in an intermediary position. In this example, as only a portion of the fluid in each fluid reservoir 2904 and 3000 has been displaced from the respective reservoir 2904 or 3000, the bidirectional linear actuator 2900 will stop transitioning between the extended and retracted positions at an intermediary position. When the valve 2922 transitions to the closed position, the bidirectional linear’ actuator 2900 is retained at the intermediary position by opposing hydrostatic forces. As such, in some instances, the bidirectional linear actuator 2900 may generally be described as having an infinite number of intermediary positions.

[0130] FIG. 33 shows a cross-sectional perspective view of the valve 2922. As shown, the valve 2922 includes a valve body 3300. The valve body 3300 may be a multi-piece or single piece body. The valve body 3300 includes a first fluid pathway 3302, a second fluid pathway 3304, and a valve cavity 3306. The valve cavity 3306 is configured to moveably receive the first and second valve portions 3200 and 3202. The first valve portion 3200 may move independent of the second valve portion 3202 or collectively with the second valve portion 3202. Independent movement of the first valve portion 3200 relative to the second valve portion 3202 allows for a pressure differentialcaused by fluid flowing from the second fluid reservoir 3000 (FIG. 30) to the first column region 2932 (FIG. 29) to cause the first valve portion 3200 to move, transitioning the valve 2922 to the open position (which allows fluid flow through the valve body 3300). Collective movement of the first and second valve portions 3200 and 3202 also transitions the valve 2922 to the open position. For example, when the bidirectional linear actuator 2900 (FIG. 29) transitions to the retracted position, the fluid flow path 2918 (FIG. 29) is incident on the second valve portion 3202, which exerts a force on the second valve portion 3202 and causes the first and second valve portions 3200 and 3202 to move collectively, opening the valve 2922.

[0131] FIGS. 34-36 shows a cross-sectional view of an example of a valve 3400 which may replace the valve 2922 in the bidirectional linear actuator 2900 of FIG. 29. FIG. 34 shows the valve 3400 in a closed position, FIG. 35 shows the valve 3400 in a first open position, and FIG. 36 shows the valve 3400 in a second open position.

[0132] As shown, the valve 3400 includes a valve body 3402. The valve body 3402 may be a multi-piece or single piece body. The valve body 3402 includes a first fluid pathway 3404, a second fluid pathway 3406, a bleed pathway 3408, and a valve cavity 3410. The valve cavity 3410 is configured to movably receive a valve portion 3412. The valve portion 3412 is configured to move to transition the valve 3400 between the closed position, the first open position, and the second open position. A biasing mechanism 3414 is disposed within the valve cavity 3410 between the valve body 3402 and valve portion 3412. The biasing mechanism 3414 is coupled to the valve body 3402 and configured to exert a force of the valve portion 3412 when the valve 3400 is in the first open position. As shown, when the valve 3400 is in the second open position, the valve portion 3412 is spaced apart from the biasing mechanism 3414 such that the biasing mechanism 3414 is not exerting a force on the valve portion 3412. One example of the biasing mechanism 3414 is a spring (e.g., a compression spring).

[0133] When fluid flows from the second fluid reservoir 3000 (FIG. 30) to the first column region 2932 (FIG. 29), the fluid flows along the first fluid pathway 3404 to be incident on the valve portion 3412. The fluid incident on the valve portion 3412 exerts a force on the valve portion 3412 and causes the valve portion 3412 to move from a sealing position (FIG. 34) to a first passthrough position (FIG. 35). As the valve portion 3412 moves from the sealing position to the first passthrough position, the biasing mechanism 3414 is compressed. When the flow of fluid stops, the biasing mechanism 3414 urges the valve portion 3412 toward the sealing position.

[0134] When fluid flows from the first fluid reservoir 2904 (FIG. 29) to the second column region 3002 (FIG. 3), the fluid flows along the second fluid pathway 3406. A portion of the fluid flowing along the second fluid pathway 3406 passes through the bleed pathway 3408 to be incident on the valve portion 3412. The fluid exiting the bleed pathway 3408 and incident on the valve portion 3412 exerts a force on the valve portion 3412 and causes the valve portion to move from the sealing position to a second passthrough position (FIG. 36). When the flow of fluid stops, the valve portion 3412 is transitioned from the second passthrough position to the sealing position in response to a force being applied to the extension shaft 2930 (FIG. 29). For example, the force may be generated when a rider sits on the seat 202 (FIG. 2).

[0135] While the present disclosure has generally focused on generating an actuation force for actuating a bidirectional linear actuator using a user generated force that is exerted on a remote control interface, other configurations are possible. For example, the actuation force used to actuate the bidirectional linear actuator may be generated using an electric motor. In these examples, the user may depress an input that causes electrical energy to be supplied to the electric motor. The electric motor is then configured to exert the extend and retract forces on the bidirectional linear actuator.

[0136] FIG. 37 shows a schematic example of an electronically driven bidirectional linear actuation system 3700. The bidirectional linear actuation system 3700 includes a bidirectional linear actuator 3702, a remote control interface 3704, at least one power supply 3706, and a motor 3708. In some instances, the bidirectional linear actuation system 3700 may include a controller 3710 having one or more processors 3712 and one or more memories 3714 (e.g., non-transitory memories). The bidirectional linear actuator 3702 may have a similar configuration to any of bidirectional linear actuators described herein (e.g., bidirectional linear actuator 204 or 2900).

[0137] The remote control interface 3704 is configured to cause the motor 3708 to rotate in response to a user input at the remote control interface 3704. Rotation of the motor 3708 may be transferred to a work converter 3715 of the bidirectional linear actuation system 3700. The work converter 3715 is configured to receive rotational motion from the motor 3708 to generate an output force and an output displacement distance. The output force and the output displacement distance is transferred to the bidirectional linear actuator 3702 to cause the bidirectional linear actuator 3702 to transition between extended and retracted positions. The work converter 3715 is an example of the work converter 110 of FIG. 1.

[0138] The remote control interface 3704 may be communicatively coupled to the controller 3710 such that the controller 3710 is configured to detect a user input at the remote control interface 3704. For example, the remote control interface 3704 may include an electronic switch (e.g., a pushbutton switch), wherein the controller 3710 is configured to detect actuation of the remote control interface 3704. The controller 3710 may be communicatively coupled to the motor 3708 such that the motor 3708 is selectively driven based on outputs generated by the controller 3710. For example, when the controller 3710 detects the actuation of the remote control interface 3704, the controller 3710 may output a signal that causes the motor 3708 to rotate. Rotation of the motor 3708 causes the bidirectional linear actuator 3702 to extend or retract. For example, rotation of the motor 3708 may apply a force to the extend and retract cables 408 and 406 (e.g., by wrapping / unwrapping the extend and retract cables 408 and 406 from a pulley / spool).

[0139] In some instances, the controller 3710 may be communicatively coupled to one or more sensors 3716. The one or more sensors 3716 may generate one or more sensor outputs that cause the controller 3710 to generate a controller output that causes the motor 3708 to rotate. In these instances, the bidirectional linear actuator 3702 may extend or retract automatically (in addition to or in the alternative to user inputs). For example, the one or more sensors 3716 may include one or more of an accelerometer sensor, gyroscopic sensor, global positioning system (GPS) sensor, and / or the like. In one example, the controller 3710 may automatically adjust the bidirectional linear actuator 3702 based on a detected orientation of the bicycle 200 as detected by the gyroscopic sensor. Additionally, or alternatively, the controller 3710 may automatically adjust the bidirectional linear actuator 3702 based on a detected location of the bicycle 200 using the GPS sensor (e.g., the GPS sensor output may be used in conjunction with topographic map data, past ride data, and / or the like). For example, a rider may pre-program locations along a trail in which the bidirectional linear actuator 3702 is to retract or extend. In some instances, the controller 3710 may be configured to record locations where the rider regularly adjusts the bidirectional linear actuator 3702 and generate an automatic adjustment profile to be used on future rides (e.g., if the rider approves of the automatic adjustment profile).

[0140] The controller 3710, the motor 3708, and the remote control interface 3704 may be electrically coupled to the at least one power supply 3706. In some instances, the at least one power supply 3706 may include a plurality of power supplies 3706, wherein at least one of the plurality of power supplies 3706 is electrically coupled to only one of the controller 3710, themotor 3708, or the remote control interface 3704. For example, the remote control interface 3704 may include a control power supply 3706 and the controller 3710 and the motor 3708 may include a controller / motor power supply 3706. In this example, the remote control interface 3704 may be wirelessly communicatively coupled to the controller 3710. In some instances, each of the controller 3710, the motor 3708, and the remote control interface 3704 may have a dedicated power supply 3706. In these instances, the controller 3710 may be wirelessly communicatively coupled to the motor 3708 and the remote control interface 3704. The power supply 3706 may include one or more batteries (e.g., rechargeable batteries).

[0141] When the bidirectional linear actuator 3702 has a similar configuration to the bidirectional linear actuators 204 or 2900, a weight of a rider on the seat 202 (FIG. 2) is borne by an index assembly 3718 (e.g., a hydraulic index or a mechanical index) of the bidirectional linear’ actuator 3702. In other words, the index assembly 3718 may generally be described as being configured retain the bidirectional linear actuator at one or more positions (e.g., one or more of an extended position, a retracted position, and / or one or more intermediary positions). An example of a mechanical index assembly 3718 includes the retract and extend latches 1810 and 1812 (FIG. 18) and the catches 1816 and 1818 (FIG. 18). An example of a hydraulic index assembly includes the opposing hydrostatic forces generated in the extend column 2924 (FIG. 29) on the plunger 2928 (FIG. 29) when the valve 2922 (FIG. 29) is closed.

[0142] For example, when the bidirectional linear actuator 3702 has a configuration similar’ to that of the bidirectional linear’ actuator 204, the retract and extend latches 1810 and 1812 and the catches 1816 and 1818 support the rider’s weight. In this example, when there is no engagement between a latch and catch, the bidirectional linear’ actuator 3702 may be back driven in response to a rider’ s weight being applied to the seat 202, transitioning the seat 202 towards the lowered position. By way of further example, when the bidirectional linear actuator 3702 has a configuration similar to that of the bidirectional linear actuator 2900, the hydrostatic forces support the rider’s weight. Such configurations may allow a smaller and / or lighter drivetrain 3720 for transferring rotational motion from the motor 3708 to the bidirectional linear actuator 3702 to be used. For example, when the drivetrain 3720 includes a leadscrew (e.g., in addition to, or in the alternative to, the cables 406 and 408), the leadscrew only needs to be configured to support the forces associated with actuating the bidirectional linear’ actuator 3702 and not the full weight of the rider, which allows the leadscrew to be lighter and smaller. In some instances, the leadscrewmay couple to the control piston 2906 (FIG. 29) and be configured to cause the control piston 2906 to move in response to rotation of the Icadscrcw. As the control piston 2906 forms part of the work converter 3715, a length of the leadscrew may be smaller, reducing a size and / or weight of the leadscrew. Reducing a weight and / or size of components on a bicycle is often desirable to a rider.

[0143] FIG. 38 shows a schematic example of an electronically driven bidirectional linear actuation system 3800, which is an example of the electronically driven bidirectional linear actuation system 3700 of FIG. 37. As shown, the electronically driven bidirectional linear actuation system 3800 includes a motor 3802, a pulley / spool 3804 coupled to an output of the motor 3802, and a bidirectional linear actuator 3806 (which is an example of the bidirectional linear actuator 3702 of FIG. 37). The electronically driven bidirectional linear actuation system 3800 may further include a remote control interface 3805 and a power source 3807 (e.g., one or more batteries), wherein an input at the remote control interface 3805 causes power from the power source 3807 to be supplied to the motor 3802, causing the motor 3802 to rotate.

[0144] The motor 3802 is configured to rotate the pulley / spool 3804 to transition the bidirectional linear actuator 3806 between an extended and a retracted position. For example, rotation of the pulley / spool 3804 may cause a force to be exerted on one or more cables 3808 to cause a shuttle 3810 (which is an example of the shuttle 1602 of FIG. 16) to move along an actuation shaft 3812 (which is an example of the actuation shaft 1604 of FIG. 16). Movement of the shuttle 3810 along the actuation shaft 3812 is configured to causes corresponding latches 3814 (which are examples of the retract and extend latches 1810 and 1812 of FIG. 18) to engage corresponding catches 3816 (which are examples of the catches 1816 and 1818 of FIG. 18). As the latches 3814 and catches 3816 within the bidirectional linear actuator 3806 support external loads applied to the bidirectional linear actuator 3806 (in the actuation direction), the pulley / spool 3804 and / or cables 3808 may be configured to support smaller loads.

[0145] FIG. 39 shows a schematic example of an electronically driven bidirectional linear actuation system 3900, which is an example of the electronically driven bidirectional linear actuation system 3700 of FIG. 37. As shown, the electronically driven bidirectional linear actuation system 3900 includes a motor 3902, a leadscrew 3904 coupled to an output of the motor3902, and a bidirectional linear actuator 3906 (which is an example of the bidirectional linear actuator 3702 of FIG. 37). The electronically driven bidirectional linear actuation system 3900may further include a remote control interface 3905 and a power source 3907 (e.g., one or more batteries), wherein an input at the remote control interface 3905 causes power from the power source 3907 to be supplied to the motor 3902, causing the motor 3902 to rotate.

[0146] As shown, the leadscrew 3904 is configured to rotate within a drive nut 3908, wherein rotation of the leadscrew 3904 within the drive nut 3908 causes the drive nut 3908 to move along the leadscrew 3904. The drive nut 3908 is coupled to a control piston 3910 (which is an example of the control piston 2906) of the bidirectional linear actuator 3906 such that the control piston 3910 moves with the drive nut 3908. Movement of the control piston 3910 displaces fluid within the bidirectional linear actuator 3906 such that the bidirectional linear actuator 3906 transitions between extended and retracted positions. Movement of the control piston 3910 to displace fluid may allow the control piston 3910 to form part of a work converter. Such a configuration may allow a length of the leadscrew 3904 to be reduced (relative to a configuration in which the bidirectional linear actuator 3906 is transitioned between extended and retracted positions directly by the movement of the drive nut 3908 along the leadscrew 3904). Reducing the length of the leadscrew 3904 may reduce weight, effects of frictional forces between the leadscrew 3904 and drive nut 3908 (e.g., which may impact power consumption, shortening a runtime of the power source 3907), and / or overall size of the leadscrew 3904 and drive nut 3908. Further, as hydrostatic forces within the bidirectional linear actuator 3906 support external loads applied to the bidirectional linear actuator 3906 (in the actuation direction), the leadscrew 3904 and drive nut 3908 may be configured to support smaller loads.

[0147] While the bidirectional linear actuators 204 and 2900 are shown herein as being cylindrical in shape with a circular cross-section, other configurations are possible. For example, the bidirectional linear actuators 204 and 2900 may be rectangular in shape with a square or rectangular cross-section. By way of further example, the bidirectional linear actuators 204 and 2900 may have an oval cross-section.

[0148] An example of a bicycle, consistent with the present disclosure, may include a frame, a plurality of pedals rotatable relative to the frame, a plurality of wheels rotatable relative to the frame, a drivetrain configured to transfer rotational motion from the plurality of pedals to one of the plurality of wheels, a handle bar, a seat, and a bidirectional linear actuation system configured to transition the seat between a raised position and a lowered position. The bidirectional linear actuation system may include a remote control interface coupled to the handle bar, a bidirectionallinear actuator coupled to the seat, the bidirectional linear actuator having a main body and an extension body configured to cooperate telescopically with the main body and configured to move relative to the main body to transition the seat between the raised position and the lowered position, and a work converter configured to receive an input force from the remote control interface over a first displacement distance and configured to generate an output force over a second displacement distance that causes the extension body to move relative to the main body.

[0149] In some instances, the remote control interface may include the work converter. In some instances, the bidirectional linear actuator may include the work converter. In some instances, the remote control interface may be configured to alternate between applying a first cable force to a retract cable and a second cable force to an extend cable. In some instances, application of the first cable force may cause the retract cable to be drawn into the remote control interface and application of the second cable force causes the extend cable to be drawn into the remote control interface. In some instances, a length of the retract cable or the extend cable drawn into the remote control interface may be equal to the second displacement distance. In some instances, a movement distance of the extension body may be substantially equal to the second displacement distance. In some instances, the bidirectional linear actuation system may be further configured to transition the seat to an intermediary position, the intermediary position being between the raised and lowered positions. In some instances, a movement distance of the extension body may be substantially equal to the second displacement distance. In some instances, the bidirectional linear actuator may be a hydraulic bidirectional linear actuator. In some instances, the bidirectional linear actuator may be configured to transition the seat to one or more intermediary positions, the one or more intermediary positions being between the raised position and the lowered position. In some instances, a first portion of the work converter may be included with the remote control interface and a second portion of the work converter may be included with the bidirectional linear actuator.

[0150] An example of a bidirectional linear actuation system, consistent with the present disclosure, may include a remote control interface, a bidirectional linear actuator, the bidirectional linear actuator having a main body and an extension body configured to cooperate telescopically with the main body and configured to move relative to the main body to transition between an extended position and a retracted position, and a work converter configured to receive an input force from the remote control interface over a first displacement distance and configured togenerate an output force over a second displacement distance that causes the extension body to move relative to the main body.

[0151] In some instances, the remote control interface may include the work converter. In some instances, the bidirectional linear actuator may include the work converter. In some instances, the remote control interface may be configured to alternate between applying a first cable force to a retract cable and a second cable force to an extend cable. In some instances, application of the first cable force may cause the retract cable to be drawn into the remote control interface and application of the second cable force causes the extend cable to be drawn into the remote control interface. In some instances, a length of the retract cable or the extend cable drawn into the remote control interface may be equal to the second displacement distance. In some instances, a movement distance of the extension body may be substantially equal to the second displacement distance. In some instances, the extension body may further be configured to move to an intermediary position, the intermediary position being between the raised and lowered positions. In some instances, a movement distance of the extension body may be substantially equal to the second displacement distance. In some instances, the bidirectional linear actuator may be a hydraulic bidirectional linear actuator. In some instances, the extension body may be configured to transition to one or more intermediary positions, the one or more intermediary positions being between the extended position and the retracted position. In some instances, a first portion of the work converter may be included with the remote control interface and a second portion of the work converter may be included with the bidirectional linear actuator.

[0152] Another example of a bidirectional linear actuation system, consistent with the present disclosure, may include a remote control interface, a motor configured to rotate in response to a user input at the remote control interface, a bidirectional linear actuator, the bidirectional linear actuator having a main body, an extension body configured to cooperate telescopically with the main body, and an index assembly, the extension body configured to move relative to the main body to transition between an extended position and a retracted position, the extension body being retained at the extended position by the index assembly, and a work converter configured to receive the rotation of the motor and to generate an output force and an output displacement distance to transition the bidirectional linear actuator between the extended and retracted positions.

[0153] In some instances, the index assembly may be a mechanical index assembly. In some instances, the index assembly may be a hydraulic index assembly. In some instances, the bidirectional linear actuator may be a hydraulic bidirectional linear actuator.

[0154] Another example of a bidirectional linear actuation system, consistent with the present disclosure, may include a remote control interface, a motor configured to rotate in response to a user input at the remote control interface, and a bidirectional linear actuator, the bidirectional linear actuator having a main body, an extension body configured to cooperate telescopically with the main body, and an index assembly, the extension body configured to move relative to the main body to transition between an extended position and a retracted position, the extension body being retained at the extended position by the index assembly.

[0155] In some instances, the bidirectional linear actuation system may further include a work converter configured to receive the rotation of the motor and to generate an output force and an output displacement distance to transition the bidirectional linear actuator between the extended and retracted positions. In some instances, the index assembly may be a mechanical index assembly. In some instances, the index assembly may be a hydraulic index assembly. In some instances, the bidirectional linear actuator may be a hydraulic bidirectional linear actuator.

[0156] While the principles of the invention have been described herein, it is to be understood by those skilled in the art that this description is made only by way of example and not as a limitation as to the scope of the invention. Other embodiments are contemplated within the scope of the present invention in addition to the exemplary embodiments shown and described herein. Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the following claims.

Claims

What is claimed is:

1. A bicycle comprising: a frame; a plurality of pedals rotatable relative to the frame; a plurality of wheels rotatable relative to the frame; a drivetrain configured to transfer rotational motion from the plurality of pedals to one of the plurality of wheels; a handle bar; a seat; and a bidirectional linear actuation system configured to transition the seat between a raised position and a lowered position, the bidirectional linear actuation system including: a remote control interface coupled to the handle bar; a bidirectional linear actuator coupled to the seat, the bidirectional linear actuator having a main body and an extension body configured to cooperate telescopically with the main body and configured to move relative to the main body to transition the seat between the raised position and the lowered position; and a work converter configured to receive an input force from the remote control interface over a first displacement distance and configured to generate an output force over a second displacement distance that causes the extension body to move relative to the main body.

2. The bicycle of claim 1, wherein the remote control interface includes the work converter.

3. The bicycle of claim 1, wherein the bidirectional linear actuator includes the work converter.

4. The bicycle of claim 1, wherein the remote control interface is configured to alternate between applying a first cable force to a retract cable and a second cable force to an extend cable.

5. The bicycle of claim 4, wherein application of the first cable force causes the retract cable to be drawn into the remote control interface and application of the second cable force causes the extend cable to be drawn into the remote control interface.

6. The bicycle of claim 5, wherein a length of the retract cable or the extend cable drawn into the remote control interface is equal to the second displacement distance.

7. The bicycle of claim 6, wherein, a movement distance of the extension body is substantially equal to the second displacement distance.

8. The bicycle of claim 7, wherein the bidirectional linear actuation system is further configured to transition the seat to an intermediary position, the intermediary position being between the raised and lowered positions.

9. The bicycle of claim 1 , wherein, a movement distance of the extension body is substantially equal to the second displacement distance.

10. The bicycle of claim 1, wherein the bidirectional linear actuator is a hydraulic bidirectional linear actuator.

11. The bicycle of claim 1 , wherein the bidirectional linear actuator is configured to transition the seat to one or more intermediary positions, the one or more intermediary positions being between the raised position and the lowered position.

12. The bicycle of claim 1, wherein a first portion of the work converter is included with the remote control interface and a second portion of the work converter is included with the bidirectional linear actuator.

13. A bidirectional linear actuation system comprising: a remote control interface;a bidirectional linear actuator, the bidirectional linear actuator having a main body and an extension body configured to cooperate telescopically with the main body and configured to move relative to the main body to transition between an extended position and a retracted position; and a work converter configured to receive an input force from the remote control interface over a first displacement distance and configured to generate an output force over a second displacement distance that causes the extension body to move relative to the main body.

14. The bidirectional linear actuation system of claim 13, wherein the remote control interface includes the work converter.

15. The bidirectional linear actuation system of claim 13, wherein the bidirectional linear actuator includes the work converter.

16. The bidirectional linear actuation system of claim 13, wherein the remote control interface is configured to alternate between applying a first cable force to a retract cable and a second cable force to an extend cable.

17. The bidirectional linear actuation system of claim 16, wherein application of the first cable force causes the retract cable to be drawn into the remote control interface and application of the second cable force causes the extend cable to be drawn into the remote control interface.

18. The bidirectional linear actuation system of claim 17, wherein a length of the retract cable or the extend cable drawn into the remote control interface is equal to the second displacement distance.

19. The bidirectional linear actuation system of claim 18, wherein, a movement distance of the extension body is substantially equal to the second displacement distance.

20. The bidirectional linear actuation system of claim 19, wherein the extension body is further configured to move to an intermediary position, the intermediary position being between the extended and retracted positions.21 . The bidirectional linear actuation system of claim 13, wherein, a movement distance of the extension body is substantially equal to the second displacement distance.

22. The bidirectional linear actuation system of claim 13, wherein the bidirectional linear actuator is a hydraulic bidirectional linear actuator.

23. The bidirectional linear actuation system of claim 13, wherein extension body is configured to transition to one or more intermediary positions, the one or more intermediary positions being between the extended position and the retracted position.

24. The bidirectional linear actuation system of claim 13, wherein a first portion of the work converter is included with the remote control interface and a second portion of the work converter is included with the bidirectional linear actuator.

25. A bidirectional linear actuation system comprising: a remote control interface; a motor configured to rotate in response to a user input at the remote control interface; and a bidirectional linear actuator, the bidirectional linear actuator having a main body, an extension body configured to cooperate telescopically with the main body, and an index assembly, the extension body configured to move relative to the main body to transition between an extended position and a retracted position, the extension body being retained at the extended position by the index assembly.

26. The bidirectional linear actuation system of claim 25 further comprising a work converter configured to receive the rotation of the motor and to generate an output force and an output displacement distance to transition the bidirectional linear actuator between the extended and retracted positions.

27. The bidirectional linear actuation system of claim 25, wherein the index assembly is a mechanical index assembly.

28. The bidirectional linear actuation system of claim 25, wherein the index assembly is a hydraulic index assembly.

29. The bidirectional linear actuation system of claim 25, wherein the bidirectional linear actuator is a hydraulic bidirectional linear actuator.

Images