Height-adjustable seat post for bicycle

Abstract

The invention relates to a height adjustable seatpost for a bicycle. An exemplary height adjustable seating post includes an upper tube and a lower tube configured in a telescopic arrangement and a piston in the upper tube. The piston divides the upper tube into a first chamber and a second chamber. The first chamber and the second chamber are filled with a fluid. The height adjustable seatpost also includes a valve including a fixed member and a rotatable member that form a face seal between a first face of the fixed member and a second face of the rotatable member. The stationary member has a fluid flow passage. The rotatable member is rotatable relative to the fixed member between a closed position, in which the rotatable member blocks the fluid flow passage to prevent fluid flow between the first chamber and the second chamber, and an open position, in which fluid is allowed to flow between the first chamber and the second chamber through the fluid flow passage.

Description

Technical Field

[0001] The present disclosure relates generally to bicycle components and, more particularly, to a height adjustable seat post for a bicycle. Background Art

[0002] Bicycles are known to have a seat or saddle to support the rider in a seated position. The seat is typically connected to the bicycle frame by a seat post. On most bicycles, the seat post can be manually adjusted to raise or lower the height of the seat to accommodate different riders of different heights. The height can also be adjusted to accommodate different riding conditions. Typically, the seat post is mechanically clamped to the tube of the bicycle frame. When the clamp is released, the seat and seat post can slide up and down relative to the tube of the bicycle frame to adjust the height of the seat. On some recent higher-end bicycles, the height of the seat post can be adjusted during riding of the bicycle by employing some type of hydraulic assist mechanism. For example, a manually actuated hydraulic height-adjustable or "lift" seat post may use a hydraulic pressure differential within the seat post and require manual operation to adjust the seat post height. Some products may use ANT+ wireless communication technology, allowing the rider to wirelessly adjust the seat height. Summary of the invention

[0003] An exemplary height-adjustable seat post for a bicycle disclosed herein includes an upper tube and a lower tube configured in a telescopic arrangement. The lower tube is used to couple to a frame of the bicycle, and the upper tube is used to couple to a seat. The height-adjustable seat post includes a piston in the upper tube. The piston divides the upper tube into a first chamber and a second chamber. The first chamber and the second chamber are filled with a fluid. The height-adjustable seat post also includes a valve, which includes a fixed member and a rotatable member, the fixed member and the rotatable member forming a face seal between a first face of the fixed member and a second face of the rotatable member. The fixed member has a fluid flow path. The rotatable member can rotate relative to the fixed member between a closed position and an open position, in which the rotatable member blocks the fluid flow path to prevent fluid from flowing between the first chamber and the second chamber, and in the open position, allows fluid to flow between the first chamber and the second chamber through the fluid flow path.

[0004] An exemplary bicycle component disclosed herein includes a first tube and a second tube configured in a telescopic arrangement and a piston in the first tube. The piston divides the first tube into a first chamber and a second chamber. The first chamber and the second chamber are filled with a fluid. The bicycle component also includes a valve that can be operated between a closed state and an open state, in which the fluid is prevented from flowing across the piston between the first chamber and the second chamber to keep the first tube and the second tube in a suitable position, and in which the fluid can flow across the piston between the first chamber and the second chamber to enable the first tube and the second tube to move toward or away from each other. The valve includes a fixed disk and a rotatable disk disposed in a hole in the piston. The fixed disk has a fixed disk fluid flow path extending through the fixed disk in an axial direction. The rotatable disk can rotate relative to the fixed disk to switch the valve between the closed state and the open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 is a side view of an example bicycle that may employ any of the example height adjustable seatposts disclosed herein.

[0006] Figure 2 is a side view of an exemplary height adjustable seatpost in a fully extended position.

[0007] Figure 3 is in a partially retracted / retracted position Figure 2 Side view of an exemplary height adjustable seat post.

[0008] Figure 4 Yes, you can Figure 2 An enlarged view of an exemplary control module implemented on an exemplary height adjustable seatpost.

[0009] Figure 5 is in the fully extended / extended position Figure 2 A cross-sectional view of an exemplary height adjustable seat post.

[0010] Figure 6 is in a partially retracted position Figure 3 A cross-sectional view of an exemplary height adjustable seat post.

[0011] Figure 7 yes Figure 5 , showing an example valve for adding pneumatic gas to an example height adjustable seatpost.

[0012] Figure 8 yes Figure 6 , showing an enlarged view of the labeled portion of , a cross-sectional view of an exemplary piston assembly having an exemplary rotary valve implemented in an exemplary height adjustable seat post.

[0013] Fig. 9 Is adjacent Figure 2 An exploded view of an exemplary motor assembly and an exemplary motor assembly housing at the lower end of an exemplary height adjustable seat post.

[0014] Fig.10 yes Fig. 9 An exploded view of an exemplary motor assembly.

[0015] Fig.11 yes Fig.10 Assembly diagram of an exemplary motor assembly.

[0016] Fig.12 yes Figure 5 is an enlarged view of the lower labeled portion of , showing a cross-sectional view of an exemplary motor assembly on the lower end of an exemplary height adjustable seat post.

[0017] Fig.13 is along the perpendicular Fig.12 The cross-sectional view is taken from the plane Fig.12 A cross-sectional view of an exemplary motor assembly.

[0018] Fig.14 is connected to Figure 2 A perspective view of an example piston assembly of an example shaft of an example height adjustable seat post.

[0019] Fig.15 yes Fig.14 An exploded view of an exemplary piston assembly and an exemplary shaft.

[0020] Fig.16 yes Fig.14 and Fig.15 A side view of an exemplary piston assembly and an exemplary shaft with an exemplary rotary valve in a closed state.

[0021] Fig.17 It is along Fig.16 A cross-sectional view of an exemplary piston assembly and an exemplary shaft taken along line AA of FIG. 1 shows an exemplary rotary valve in a closed state.

[0022] Fig.18 It is along Fig.16 A cross-sectional view of an exemplary piston assembly taken along line BB of FIG. 1 , showing an exemplary opening in an exemplary fixed disk.

[0023] Fig.19 It is along Fig.16 A cross-sectional view of an exemplary piston assembly taken along line CC of FIG. 1 , showing an exemplary rotatable disk in a closed position.

[0024] Fig. 20 yes Fig.14 and Fig.15A side view of an exemplary piston assembly and an exemplary shaft with an exemplary rotary valve in an open state.

[0025] Fig.21 It is along Fig. 20 A cross-sectional view of an exemplary piston assembly and an exemplary shaft taken along line DD of FIG. 1 shows an exemplary rotary valve in an open state.

[0026] Fig. 22 It is along Fig. 20 A cross-sectional view of an exemplary piston assembly taken along line EE of FIG. 1 , showing an exemplary opening in an exemplary fixed disk.

[0027] Fig.23 It is along Fig. 20 A cross-sectional view of an exemplary piston assembly taken along line FF of FIG. 1 , showing an exemplary rotatable disk in an open position.

[0028] Fig.24 is similar to Figure 2 A cross-sectional view of an example height adjustable seatpost of but with an example motor assembly mounted in an example upper tube with an example piston assembly.

[0029] Fig.25 yes Fig.24 is an enlarged view of the lower labeled portion of , showing the lower end of an exemplary down tube of an exemplary height adjustable seat post.

[0030] Fig.26 yes Fig.24 An enlarged view of the upper labeled portion of shows an exemplary piston assembly and an exemplary motor assembly in an exemplary upper tube.

[0031] Fig. 27 is a control housing and battery with alternative shapes Figure 2 A perspective view of an exemplary height adjustable seat post.

[0032] Fig.28 yes Fig. 27 Side view of an exemplary height adjustable seat post.

[0033] The drawings are not drawn to scale. Instead, the thickness of layers or regions may be exaggerated in the drawings. Generally, the same reference numerals will be used throughout the drawings and the accompanying written description to refer to the same or similar components.

[0034] When identifying multiple elements or components that can be referenced separately, the descriptors "first", "second", "third", etc. are used herein. Unless otherwise specified or understood based on the context of their use, such descriptors are not intended to impart any meaning of priority or ordering in time, but are merely used as labels for referring to multiple elements or components separately to facilitate understanding of the disclosed examples. In some examples, the descriptor "first" can be used to refer to an element in a specific embodiment, while the same element can be referred to by different descriptors (such as "second" or "third") in the claims. In this case, it should be understood that such descriptors are used only for the convenience of referring to multiple elements or components. DETAILED DESCRIPTION

[0035] Some modern bicycles include height-adjustable seatposts (sometimes called dropper seatposts) that allow riders to change the height of their saddles while riding a bicycle. For example, a rider can actuate a seatpost actuator on the handlebars and push the saddle downward (e.g., using their hips), which contracts or compresses the seatpost and thereby lowers the height of the saddle. When the rider stops actuating the seatpost actuator, the seatpost remains in the retracted position. Then, when the rider desires to raise the saddle, the rider can actuate the seatpost actuator again, thereby extending or expanding the seatpost to move the saddle back to the original height. This ability to lower may be advantageous when the rider is about to ride a bicycle down a steep slope. For example, it is often desirable to lower the saddle while going down a downhill slope so that the rider can stand and lean back without the saddle hitting their hips. This ability to lower may also be used to lower the saddle before the rider encounters a slope, where the rider typically stands up and pedals. Adjustable seatposts may also be used in other scenarios.

[0036] Known dropper seatposts rely on hydraulic fluid and / or pneumatic pressure controlled by mechanical or hydraulically actuated valves to change height. More recently, dropper seatposts have used battery-powered motors controlled by electrical signals to actuate the valves. These motor systems require complex gear systems to produce linear motion to actuate the valves. These motor systems also require motor position encoders and monitoring systems to ensure proper valve actuation. As a result, these known motor systems are often complex to manufacture and can be relatively expensive. In addition, these linear valves utilize linear motion of a plug or valve member to open and close the valve. This type of valve may also be referred to as a volume displacement valve because a small volume change occurs in the hydraulic chamber of the seatpost when the valve state changes. This requires additional power from the motor system to overcome the pressure differential to open / close the valve.

[0037] Disclosed herein is a height-adjustable seat post that utilizes a motor-operated rotary valve to enable the seat post to expand or contract. The rotary valve can be switched between an open state and a closed state, wherein the open state enables the seat post to expand or contract, and the closed state closes the valve and holds the seat post in a certain position (corresponding to a certain seat height). The exemplary rotary valves disclosed herein are advantageous because they are non-volume-displacing, meaning that they do not change the volume of a chamber (e.g., a pneumatic chamber) when switching between an open state and a closed state. Therefore, when opening / closing the valve, the motor does not need to provide additional power to overcome the pressure difference across the valve. This reduces the amount of power required by the motor to operate the valve. In addition, the exemplary motor-operated rotary valves disclosed herein are advantageous because they do not require position monitoring as seen in known lift-type seat posts. This greatly reduces manufacturing complexity and cost.

[0038] An exemplary height adjustable seat post disclosed herein includes an upper tube and a lower tube configured in a telescopic arrangement. The lower tube is coupled or mounted to a bicycle frame, and the seat is coupled to the upper tube. The upper tube can slide relative to the lower tube to adjust the height of the seat. The upper tube is sealed at both ends and forms a pneumatic chamber filled with a pressurized gas (e.g., air, nitrogen). The seat post includes a shaft coupled to the lower tube and extending into the upper tube. The seat post includes a piston assembly disposed in the upper tube and coupled to the shaft. The piston assembly includes a piston that divides the pneumatic chamber into an upper pneumatic chamber or a positive gas chamber and a lower pneumatic chamber or a negative gas chamber. The positive gas chamber biases the upper tube and the lower tube away from each other, and the negative gas chamber biases the upper tube and the lower tube toward each other. The piston assembly is typically located in an overlapping region between the upper tube and the lower tube. The seat post also includes a rotary valve (which may also be referred to as a rotary disc valve) that controls the flow of gas through the piston and between the upper pneumatic chamber and the lower pneumatic chamber. The seat post also includes a motor to operate a rotary valve between a closed state and an open state. When the rotary valve is closed, the valve blocks or prevents gas from flowing between the two chambers. With respect to the terms "blocking" or "preventing", for the purposes of the following discussion, the terms "blocking" or "preventing" refer to the most restricted gas flow that can be achieved or desired. Thus, in one example, the terms "blocking" or "preventing" mean that all gas flow between the two chambers is stopped. However, in another example, the terms "blocking" or "preventing" mean that substantially all gas flow between the two chambers is stopped. The pressure in the upper pneumatic chamber is sufficient to support the weight of the rider. When it is desired to raise or lower the seat, the motor is activated to open the rotary valve. When the valve is open, gas can flow across the piston between the upper and lower pneumatic chambers. This enables the rider to move the upper tube up or down relative to the lower tube, thereby raising or lowering the height of the seat. When the desired seat position is reached, the motor is activated to close the valve, which maintains the seat post in its current position.

[0039] An exemplary rotary valve disclosed herein includes a rotatable flow control member, such as a rotatable disc, which can be rotated relative to a fixed member such as a fixed disc to switch the valve between an open state and a closed state. In some examples, the fixed disc and the rotatable disc are arranged and pressed together to form a face seal. The rotatable disc can be rotated between a closed position that blocks the fluid (in an axial direction) from flowing through one or more openings in the fixed disc and an open position that allows the fluid to flow through the openings in the fixed disc. In some examples, the fixed disc and the rotatable disc are made of relatively hard materials, such as ceramics (e.g., alumina). This enables the two discs to be pressed tightly together to form a relatively tight sealing interface / interface. In some examples, the seat rod includes a motor assembly with a motor to rotate the rotatable disc between an open position and a closed position. In other examples, the seat rod may include a solenoid or other type of actuator to operate the valve. As described above, rotary valves are advantageous because they are non-volume displacing, which means that they do not change the volume of the chamber when switching between an open state and a closed state. This reduces the amount of power used by the motor to operate the valve. In addition, rotary valves are self-latching, which means they remain in an open or closed state after the motor is deactivated. This further reduces the amount of power required by the assembly to operate the valve.

[0040] In some examples disclosed herein, a motor assembly having a motor is coupled to the lower end of the lower tube. In such examples, the seat post includes a valve stem extending through an axis between the motor assembly and the valve in the piston assembly. The motor can be activated to rotate the valve stem and control the state of the valve. In some cases, this position of the motor is advantageous because it enables the motor to be physically larger (e.g., having a larger diameter). In some examples, the seat post includes a control module with a power source (e.g., a battery) to operate (e.g., activate or deactivate) the motor. In some examples, the control module with a power source is coupled to the outer surface of the lower tube, such as at or near a collar coupled to the upper end of the lower tube. In some examples disclosed herein, the seat post includes a network for wires and / or electrical connectors, which electrically connect the control module disposed outside the tube to the motor, which is coupled to the bottom of the seat post. In other examples disclosed herein, the motor assembly is coupled to or integrated with the piston assembly in the upper tube. In this way, the motor assembly is disposed in or near the overlap region between the upper tube and the lower tube. The seat post may include additional wires extending through the shaft to electrically couple the control module to the motor.

[0041] Turning now to the accompanying drawings, Figure 1One example of a human-powered vehicle on which an example seat post disclosed herein may be implemented is shown. In this example, the vehicle is a bicycle 100 of one possible type, such as a mountain bike. In the example shown, the bicycle 100 includes a frame 102 and a front wheel 104 and a rear wheel 106 rotatably coupled to the frame 102. In the example shown, the front wheel 104 is coupled to the front end of the frame 102 via a front fork 108. The front and / or forward riding direction or orientation of the bicycle 100 is determined by Figure 1 In this way, the forward movement direction of the bicycle 100 is indicated by the direction of the arrow A.

[0042] exist Figure 1 In the example shown, the bicycle 100 includes a seat 110 (sometimes referred to as a saddle) coupled to the frame 102 (e.g., near the rear end of the frame 102 relative to the forward direction A) via a seat post 200 constructed in accordance with the teachings of the present disclosure. In particular, the seat post assembly 200 is coupled to the seat tube 114 of the frame 102. In some examples, the seat post 200 is coupled to the seat tube 114 by a clamp 116. The seat post 200 is height adjustable to raise or lower the seat 110. Exemplary height adjustable seat posts are disclosed in further detail herein. The bicycle 100 also includes a handlebar 118 coupled to the frame 102 and the front fork 108 (e.g., near the front end of the frame 102 relative to the forward direction A) for maneuvering the bicycle 100. The bicycle 100 is shown on a riding surface 120. Riding surface 120 may be any riding surface, such as the ground (eg, a dirt road, a sidewalk, a street, etc.), a man-made structure above the ground (eg, a wooden ramp), and / or any other surface.

[0043] In the illustrated example, the bicycle 100 has a drive train 122 including a crank assembly 124. The crank assembly 124 is operably coupled to a sprocket assembly 128 mounted to a hub 130 of the rear wheel 106 via a chain 126. The crank assembly 124 includes at least one and typically two crank arms 132 and pedals 134, and at least one front sprocket or chain ring 136. A rear gear changing device 138, such as a derailleur, is provided at the rear wheel 106 to move the chain 126 between different sprockets of the sprocket assembly 128. Additionally or alternatively, the bicycle 100 may include multiple front chain rings and a front gear changing device to move the chain 126 between the multiple chain rings.

[0044] The exemplary bicycle 100 may include a suspension system having one or more suspension components. In the illustrated example, the bicycle 100 includes a rear suspension component 140. In this example, the suspension component 140 is implemented as or includes a shock absorber, referred to herein as the shock absorber 140. In some examples, the front fork 108 is also implemented as a front suspension component. For example, a spring may be integrated into one of the legs, and a damper may be integrated into the other leg. Thus, the front fork 108 and the shock absorber 140 absorb shock and vibration when riding the bicycle 100 (e.g., when riding on rough terrain). In other examples, the front fork 108 and / or the shock absorber 140 may be integrated into the bicycle 100 in other configurations or arrangements.

[0045] Although Figure 1 The exemplary bicycle 100 depicted in the drawings is a type of mountain bike, but the exemplary seat posts disclosed herein can be implemented on other types of bicycles. For example, the exemplary seat posts disclosed herein can be used for road bicycles and bicycles with mechanical (e.g., cable, hydraulic, pneumatic, etc.) and non-mechanical (e.g., wired, wireless) drive systems. The exemplary seat posts disclosed herein can also be implemented on other types of two-wheeled, three-wheeled, and four-wheeled human-powered vehicles. In addition, the exemplary seat posts disclosed herein can be used on other types of vehicles, such as motor vehicles (e.g., motorcycles).

[0046] A control device or bicycle computer 109 is mounted to the stem of the handlebar 118. The bicycle computer 109 can communicate wirelessly with the seat post 200, the rear derailleur 138, the front suspension 108 and / or the rear suspension 140 to collect data and / or control the components. The bicycle computer 109 can also communicate wirelessly with the power meter 113 of the crank assembly 124. The above components can be paired with a wireless network.

[0047] Figure 2 is Figure 1 100. The seat post 200 may also be referred to as a lift seat post or seat post assembly. The length or height of the exemplary seat post 200 is adjustable so that the seat 110 ( Figure 1 ) can be raised or lowered. In the example shown, the seat post 200 includes a first tube 202 (referred to herein as the down tube 202) and a second tube 204 (referred to herein as the up tube 204). The down tube 202 and the up tube 204 may also be referred to as seat post portions or sections. Figure 2As shown, the lower tube 202 and the upper tube 204 are configured in a coaxial arrangement and aligned along an axis 206. The axis 206 corresponds to the center or longitudinal axis of the seat post 200. The lower tube 202 has a first end 208 (referred to herein as the upper end 208) and a second end 210 (referred to herein as the lower end 210) opposite the upper end 208. The upper tube 204 similarly has a first end 212 (referred to herein as the upper end 212) and a second end 500 (referred to herein as the lower end 210) opposite the upper end 212. Figure 5 and Figure 6 202) (referred to herein as the lower end 500). The upper tube 204 extends into the opening 213 in the upper end 208 of the lower tube 202. In this way, the upper tube 204 is at least partially disposed in the lower tube 202. The upper tube 204 can slide into and out of the opening 213 in the lower tube 202. Thus, the upper tube 204 and the lower tube 202 are configured in a telescoping arrangement. In other examples, the tubes 202, 204 can be configured so that the lower tube 202 extends into the lower end 500 of the upper tube 204.

[0048] In the example shown, the seat post 200 includes a seat clamp 214 coupled (e.g., welded, bolted, etc.) to the upper end 212 of the upper tube 204. The seat clamp 214 is used to attach the seat 110 ( Figure 1 ) is coupled to the seat post 200. In this example, the seat clamp 214 includes two threaded fasteners 216, 218 (e.g., bolts) that can be tightened to secure the seat 110 to the upper tube 204. In other examples, the seat post 200 can include other mechanisms for attaching to the seat 110. In the example shown, the seat post 200 includes a motor assembly 220 coupled to the lower end 210 of the down tube 202. The motor assembly 220 can also be referred to as an end cap on the lower end 210 of the down tube 202.

[0049] When the seat post 200 is mounted on the bicycle 100 ( Figure 1 ), the down tube 202 is connected to the frame 102 ( Figure 1 ). For example, the down tube 202 can be inserted into the seat tube 114 ( Figure 1 ) and by the fixture 116 ( Figure 1 ) is fixed. The upper tube 204 extends upward from the lower tube 202 and supports the seat 110 ( Figure 1 ). As disclosed in further detail herein, the seat post 200 has an internal valve system that enables the upper tube 204 to move downward (e.g., slide) relative to the lower tube 202 and provides a rebound force to move the upper tube 204 upward relative to the lower tube 202. This enables the rider to easily lower the height of the seat 110. The seat post 200 can be Figure 2The seat post 200 can be adjusted between a fully extended position (sometimes referred to as an apex position) and a fully retracted position, in which the upper tube 204 moves into the lower tube 202 until a stop or limit position is reached. The seat post 200 can also be expanded / contracted to any position between the fully extended position and the fully retracted position and remain in place. For example, Figure 3 An example is shown in which the upper tube 204 has been partially moved into the lower tube 202. In this way, the seat 110 ( Figure 1 ) will be lowered or closer to the ground.

[0050] exist Figure 2 In the example shown, the seat post 200 includes a control module 222. The control module 222 includes a power source (e.g., a battery) and circuitry (e.g., a processor circuit, a logic circuit, etc.) to operate the internal valve system. In this example, the control module 222 is coupled to the outer surface 223 of the down tube 202 at or near the upper end 208 of the down tube 202. Some known dropper seat posts position the control module on the saddle clamp. However, this location may interfere with rear tire clearance. Therefore, positioning the control module 222 at the upper end of the down tube 202, adjacent the overlap area, can be beneficial to improve rear wheel clearance. This location also helps maintain a minimum ratio of riser height to overall length.

[0051] As an example operation, if the rider desires to lower the seat 110 ( Figure 1 ), the rider actuates the seat post actuator, in this example, the stem actuation button 117 ( Figure 1 ). Alternatively, the seat post actuation button can be a lever or other type of user interface, such as a display device with a touch screen. The control module 222 receives a signal (e.g., a wireless signal) from the seat post actuation button 117 and activates the internal valve system to open the internal valve in the pneumatic chamber in the upper tube 204, as disclosed in further detail herein. When the internal valve is open, the rider can push down on the seat 110, which slides the upper tube 204 into the lower tube 202, as shown in FIG. Figure 3 204 is shown in the position of the seat 110. In some examples, the rider can apply the force by sitting on the seat 110 and applying a downward force with their hips. When the seat 110 reaches the desired height, the rider can release the button on the handlebar 118. The control module 222 closes the internal valve, which holds the upper tube 204 in place relative to the down tube 202. When the rider wishes to raise the seat 110, the rider can press the seat post actuation button 117. The control module 222 receives the signal and opens the internal valve. When little or no downward force is applied to the seat 110, the internal pneumatic system pushes the upper tube 204 upward from the down tube 202, thereby moving the seat 110 upward. When the desired position is reached, the rider can release the seat post actuation button 117, which causes the internal valve to close and hold the seat post 200 in the current position.

[0052] In some examples, to activate the internal valve system, the rider presses and holds the seat post actuation button 117. As long as the seat post actuation button 117 is pressed, the valve remains in an open state, which allows the upper tube 204 to slide up or down relative to the lower tube 202. When the rider releases the seat post actuation button 117, the spacer valve closes, which holds the upper tube 204 in place. However, in other examples, the system can be configured so that the rider can press a button and release the button to open the valve, and then the rider presses the button a second time to close the valve.

[0053] Figure 4 is an enlarged view of the control module 222. In the example shown, the control module 222 includes a collar 400, a control housing 402 coupled to the collar 400, and a power source, which in this example is a battery 404 coupled to the control housing 402. The collar 400 is wrapped around the down tube 202 and is used to couple the control module 222 to the down tube 202. In this example, the collar 400 includes a first portion 406a and a second portion 406b that are coupled together and thereby clamped around the down tube 202. In some examples, the first portion 402a and the second portion 402b are coupled by a snap fit and / or threaded fasteners (e.g., screws, bolts, etc.). The control housing 402 contains electronic components for receiving control signals and operating an internal valve system (e.g., opening a valve, closing a valve, etc.). For example, Figure 4A block diagram of a control housing 402 is shown. The control housing 402 includes a processor circuit 410 and a wireless communication device 408, which includes a receiver and may also include a transmitter. The wireless communication device 408 can receive wireless control / command signals from the seat post actuation button 117 and can send wireless control / command signals to the seat post actuation button 117 or a bicycle component (such as a bicycle computer 109). For example, in response to receiving a command, the processor circuit 410 activates the motor in the motor assembly 220 (e.g., by applying a current or voltage to the motor) to open the valve in the upper tube 204, thereby enabling the seat post 200 to expand or contract. When the seat post actuation button 117 is released, no control / command signal is received, and the processor circuit 410 activates the motor to close the valve, thereby maintaining the seat post 200 in place. In other examples, a second or separate control / command signal is received when the seat post actuation button is released. The communication device is configured to communicate wirelessly and therefore includes one or more antennas. The communication device provides wireless communication in any known or later developed format. Although this specification describes components and functionality that may be implemented in a particular embodiment with reference to particular standards and protocols, the invention is not limited to such standards and protocols. For example, the standards used for Internet and other packet-switched network transports (e.g., TCP / IP, UDP / IP, HTML, HTTP, HTTPS) represent examples of the prior art. Such standards are periodically superseded by faster or more efficient equivalents having substantially the same functionality. ANT+ TM , ZigBee, WiFi and / or AIREA TM Therefore, replacement standards and protocols having the same or similar functions as those disclosed herein are considered to be equivalents thereof.

[0054] As used herein, a "processor circuit" is defined as including (i) one or more special-purpose circuits that are constructed to perform (multiple) specific operations and include one or more semiconductor-based logic devices (e.g., electrical hardware implemented by one or more transistors), and / or (ii) one or more general-purpose semiconductor-based circuits that can be programmed with instructions to perform (multiple) specific operations and include one or more semiconductor-based logic devices (e.g., electrical hardware implemented by one or more transistors). Examples of processor circuits include programmable microprocessors, field programmable gate arrays (FPGAs) that can instantiate instructions, central processor units (CPUs), graphics processor units (GPUs), digital signal processors (DSPs), XPUs or microcontrollers, and integrated circuits such as application-specific integrated circuits (ASICs). For example, an XPU can be implemented by a heterogeneous computing system that includes multiple types of processor circuits (e.g., one or more FPGAs, one or more CPUs, one or more GPUs, one or more DSPs, etc. and / or combinations thereof) and an application programming interface (API) that can assign computing tasks to any one or more of the multiple types of processor circuits that are most suitable for performing the computing tasks.

[0055] exist Figure 4 In the example shown, the electronic components of the control housing 402 receive power from a battery 404. The battery 404 supplies power to energize or start the motor assembly 220 ( Figure 2 ) motor. In some examples, battery 404 is removable. For example, battery 404 can be removed, charged, and reattached to control housing 402. In other examples, battery 404 can be charged while battery 404 is attached to control housing 402. In other examples, battery 404 may not be rechargeable and must be replaced with a new battery. Thus, in this example, a power source for powering the motor is attached to collar 400 at upper end 208 of down tube 202. Battery 404 is secured relative to down tube 202 (via collar 400) so that when mounted on bicycle 100 ( Figure 1 ) is fixed relative to the lower tube 202.

[0056] Figure 5 is corresponding to Figure 2 A cross-sectional view of the seat post 200 in a fully extended position, and Figure 6 is corresponding to Figure 3 2 is a cross-sectional view of the seat post 200 in a partially retracted position. Figure 5 and Figure 6 Describe together. Figure 5 and Figure 6As shown, the upper tube 204 has a lower end 500. The lower end 500 is disposed in the lower tube 202. In this way, the lower tube 202 and the upper tube 204 overlap at the overlapping location or area. Figure 5 In the embodiment, the lower tube 202 and the upper tube 204 overlap by a length L1, and Figure 6 In the embodiment, the lower tube 202 and the upper tube 204 overlap by a length L2 greater than L1. Figure 6 The height or length of the seat post 200 is less than Figure 5 The height or length of the seat post 200.

[0057] like Figure 5 and Figure 6 As shown, the upper tube 204 defines a chamber 502. The chamber 502 is filled with a fluid (e.g., a pneumatic gas), as discussed in further detail herein. The seat post 200 includes an upper plug 504 (e.g., a seal) coupled to the upper tube 204 and disposed in the upper tube 204 at or near the upper end 212. The seat post 200 also includes a lower plug 506 (e.g., a seal) coupled to the upper tube 204 and disposed in the upper tube 204 at or near the lower end 500. The upper plug 504 and the lower plug 506 seal the ends of the upper tube 204 to retain the fluid in the chamber 502.

[0058] exist Figure 5 and Figure 6 In the example shown, the seat post 200 includes a shaft 508, which may be referred to as a stem or stem housing. The shaft 508 is disposed in and coupled to the lower tube 202 such that the shaft 508 is fixed relative to the lower tube 202. The shaft 508 extends upward through the lower tube 202 into the chamber 502 of the upper tube 204. In particular, the shaft 508 extends through the lower plug 506 and into the upper tube 204. When the seat post 200 expands or contracts, the lower plug 506 can slide up and down along the shaft 508.

[0059] exist Figure 5 and Figure 6In the example shown, the seat post 200 includes a piston assembly 510 disposed in the upper tube 204. The piston assembly 510 may also be referred to as a valve assembly or a flow control member. The piston assembly 510 is disposed in the chamber 502 of the upper tube 204 and is coupled to the shaft 508. When the seat post 200 expands or contracts, the piston assembly 510 is positioned away from or closer to the upper end 212 of the upper tube 204, respectively. The piston assembly 510 includes a piston 512 that seals against an inner surface 514 of the upper tube 204. When the seat post 200 expands or contracts, the inner surface 514 of the upper tube 204 can slide up and down along the piston 512. The piston assembly 510, and in particular the piston 512, divides the chamber 502 of the upper tube 204 into a first chamber 516 (between the piston 512 and the upper plug 504) and a second chamber 518 (between the piston 512 and the lower plug 506). The first chamber 516 and the second chamber 518 may also be referred to as an upper chamber and a lower chamber, respectively. The volumes of the first chamber 516 and the second chamber 518 change as the upper tube 204 moves up and down relative to the piston assembly 510. The first chamber 516 and the second chamber 518 are filled with a fluid. In this example, the seat post 200 is based on a pneumatic platform. The first chamber 516 and the second chamber 518 are filled with a pressurized gas, such as nitrogen or air. In other examples, the first chamber 516 and the second chamber 518 can be filled with another type of compressible gas. The piston assembly 510 controls the flow of gas across the piston 512 and between the first chamber 516 and the second chamber 518.

[0060] exist Figure 5 and Figure 6 In the example shown, the seat post 200 includes a valve 520. In this example, the valve 520 is incorporated into and / or integrated with the piston assembly 510. As such, the valve 520 is disposed in the upper tube 204 and at least partially in an overlap region (e.g., L1 or L2) between the upper tube 204 and the lower tube 202. In this example, the valve 520 is a rotary valve. However, in other examples, other types of valves may be used. The valve 520 may be operated (e.g., opened or closed) to control the flow of gas across the piston 512 between the first chamber 516 and the second chamber 518. In particular, the valve 520 can be operated between a closed state and an open state, in which, in the closed state, fluid (e.g., pressurized gas) is prevented from flowing across the piston 512 between the first chamber 516 and the second chamber 518, which holds the lower tube 202 and the upper tube 204 in the proper position, and in the open state, fluid is able to flow across the piston 512 between the first chamber 516 and the second chamber 518, which enables the upper tube 204 to move relative to the lower tube 202 to adjust the height of the seat 110.

[0061] To operate or control valve 520, motor assembly 220 includes motor 522. In particular, motor 522 controls the state of valve 520. However, in other examples, valve 520 can be operated by a solenoid or other type of actuator. In the example shown, motor assembly 220 (along with motor 522) is coupled to lower end 210 of lower tube 202. In other examples, motor assembly 220 can be coupled to or integrated into piston assembly 510 in upper tube 204 (examples thereof combined with Fig.24 public).

[0062] Brief reference Figure 7 , Figure 7 yes Figure 5 204, showing the upper plug 504. The upper plug 504 includes a valve 700 that enables a user to add or remove pneumatic fluid from the chamber 502 in the upper tube 204. The valve 700 is disposed in an opening 702 through the upper plug 504. In this example, the valve 700 is implemented as a Schrader valve. However, in other examples, the valve 700 may be implemented as another type of valve, such as a Presta valve. The valve 700 includes a valve body 704 (sometimes referred to as a valve stem) and a core 706 (e.g., a poppet valve) that controls the flow of fluid through the valve body 704. The user can remove the saddle clamp 214 and access the valve 700 to add or remove pneumatic fluid to / from the chamber 502.

[0063] Return to reference Figure 5 and Figure 6, in this example, the first chamber 516 is a positive pressure chamber and the second chamber 518 is a negative pressure chamber. The first chamber 516 and the second chamber 518 are pressure-tight chambers. The lower tube 202 defines a third chamber 526 between the lower plug 506 and the motor assembly 220. The third chamber 526 is considered a pressure-controlled chamber. The volume of the third chamber 526 changes based on the actuation position. In some examples, the third chamber 526 contains atmospheric air that is exhausted to the atmosphere. However, in other examples, the third chamber 526 is also a pressure-tight chamber (e.g., containing pressurized air or nitrogen). In such an example, the air in the third chamber 526 can be compressed when the upper tube 204 moves downward. The compressed air can provide a biasing force to return the seat post 200 to the fully extended position. In other examples, the third chamber 526 can have other mechanisms for compensating for volume changes, such as a floating piston or a deformable bladder. The first chamber 516, the second chamber 518, and the third chamber 526 can be any number of shapes and / or sizes. For example, the first chamber 516, the second chamber 518, and the third chamber 526 can be cylindrical (e.g., each having an outer diameter between 27 mm and 35 mm) and can be sized for a specific maximum seat post adjustment (e.g., 150 mm).

[0064] like Figure 5 and Figure 6 As shown, the piston 512 has a first side 528 facing the upper plug 504 and a second side 530 opposite the first side 528 and facing the lower plug 506. The axial surface area of ​​the first side 528 of the piston 512 (as viewed along the axis 206) is greater than the axial surface area of ​​the second side 530 of the piston 512. This is because a portion of the axial surface area of ​​the second side 530 is reduced due to the cross-sectional area of ​​the shaft 508. When the valve 520 is in the closed state and the seatpost 200 is in the fully extended position ( Figure 5 ), the first chamber 516 acts as a spring and is configured to bias the upper tube 204 toward the fully extended position of the seat post 200. The first side 528 and the second side 530 of the piston 512 are sized and shaped such that the first chamber 516 and the second chamber 518 are respectively pressurized when the seat post 200 is in the fully extended position so that the gas within the first chamber 516 supports the weight of the rider. In some examples, when the seat post 200 is in the fully extended position, the seat 110 sags less than 10 mm due to the weight of the rider on the seat 110. The seat post 200 operates because the relationship between the axial surface area of ​​the first side 528 of the piston 512 and the pneumatic pressure ratio between the first chamber 516 and the second chamber 518 is based on a force calculation to hold the rider. This also depends on the volume of the second chamber 518 when the seat post 200 is in the fully extended position. Figure 5In the example shown, when the seat post 200 is in the fully extended position, the volume of the first chamber 516 is greater than the volume of the second chamber 518. In some examples, when the seat post 200 is in the fully extended position, the volume of the second chamber 518 may not exceed 20 percent of the volume of the first chamber 516. In other examples, the first chamber 516 and the second chamber 518 may have different volume ratios in the fully extended position. For example, when the seat post 200 is in the fully extended position, the volume of the second chamber 518 may not exceed 10 percent, 5 percent, or 3 percent of the volume of the first chamber 516. This allows the seat post 200 to act as a zero negative pressure preloaded pneumatic spring. This is the principle of maintaining the rider's perception of what the rider experiences as rigidity. At the fully extended position of the seat post 200, the seat 110 may move a small amount, but the movement is generally imperceptible to the rider.

[0065] As an example operation, assume that the seat post 200 is in Figure 5 The fully extended position shown, and the rider desires to lower the seat 110 ( Figure 1 ). The rider presses (e.g., Figure 1 520, and the control module 222 activates the motor 522 to open the valve 520. When the valve 520 is open, a downward force can be applied to the seat 110 to compress the seat post 200. For example, a rider can sit (or partially sit) on the seat 110 to apply downward pressure with his / her buttocks. This downward pressure forces gas from the first chamber 516 to flow through the valve 520 (and across the piston assembly 510) and into the second chamber 518. This enables the upper tube 204 to move downward relative to the upper tube 204, thereby lowering the seat 110. As the upper tube 204 moves downward, the volume of the first chamber 516 decreases and the volume of the second chamber 518 increases. The rider can move (e.g., lower) the seat 110 to any position between the fully extended position and the fully retracted position. Figure 6 The seat post 200 is shown in an intermediate position between the fully extended position and the fully retracted position.

[0066] When the vehicle seat 110 is in a desired position, such as Figure 6520. When the seat post 200 is in the intermediate position (between the fully extended position and the fully retracted position), the seat post 110 may sag / drop a small amount (e.g., 40 mm or less) due to the weight of the rider. If the seat post 200 is moved to the fully retracted position, the saddle clamp 214 contacts the upper end 208 of the down tube 202 and / or the lower plug 506 contacts the disk 1208 in the lower end 210 of the down tube 202 ( Fig.12 ). This provides a hard stop that prevents further movement. When the seat post 200 is in the fully retracted position, the seat 110 does not sag / drop due to this hard stop. In some examples, when the seat post 200 is in the fully expanded position ( Figure 5 ), the piston 512 engages with the top of the lower plug 506. This forms a limit or stop that prevents the upper tube 204 from moving further upward relative to the lower tube 202.

[0067] When it is desired to raise the seat post 200 back to the fully extended position, the rider presses the seat post actuation button and the control module 222 activates the motor 522 to open the valve 520. In the absence of an external downward force on the seat 110 ( Figure 1), the pressure in the first chamber 516 of the upper tube 204 causes the upper tube 204 to move upward relative to the lower tube 202 back to the fully extended position. This is because the axial surface area of ​​the first side 528 of the piston 512 is greater than the axial surface area on the second side 530. Thus, the force of the pressure in the first chamber 516 acting on the first side 528 of the piston 512 is greater than the force of the pressure in the second chamber 518 acting on the second side 530 of the piston 512. As a result, the upper tube 204 is forced upward to the fully extended position. As the upper tube 204 moves upward, fluid flows from the second chamber 518 through the valve 520 to the first chamber 516. Therefore, the axial pressure imbalance biases the seat post 200 toward the fully extended position. This enables the seat post 200 to automatically expand back to the fully extended position. When the seat post 200 is fully extended, the rider can release the seat post actuation button, which activates the motor 522 to close the valve, thereby maintaining the seat post 200 in the fully extended position. Thus, the pressurized gas in the first chamber 516 biases the upper tube 204 and the lower tube 202 away from each other, and the pressurized gas in the second chamber 518 biases the upper tube 204 and the lower tube 202 toward each other.

[0068] As described above, in some examples, the third chamber 526 is open to atmosphere. As such, the third chamber 526 provides minimal (if any) biasing force on the upper tube 204. However, in other examples, the third chamber 526 can be sealed and pressurized with a positive pressure. In such an example, as the upper tube 204 moves downward, the volume of the third chamber 526 decreases, which increases the pressure in the third chamber 526. This pressure acts upward on the lower plug 506 to help bias the upper tube 204 to the fully extended position.

[0069] As described above, the control module 222 includes processor circuitry to control and operate the motor 522. Figure 5 and Figure 6 In the example shown, the control module 222 is located on the outer surface 223 of the down tube 202 at or near the upper end 208 of the down tube 202, and the motor 522 is coupled to the lower end 210 of the down tube 202. The seat post 200 may include one or more wires and / or electrical connections to form an electrical path between the control module 222 and the motor 522. This enables power and / or command signals to be transmitted between the control module 222 and the motor 522. For example, Figure 5 and Figure 6As shown, the seat post 200 includes a first wire 532 and a second wire 534 disposed in the down tube 202. In some examples, the first wire 532 and the second wire 534 are a positive wire and a negative wire. The first wire 532 and the second wire 534 are electrically coupled to the control module 222. The first wire 532 and the second wire 534 extend through the down tube 202 to the motor assembly 220. In other words, in this example, the first wire 532 and the second wire 534 extend between the upper end 208 and the lower end 210 of the down tube 202. In the example shown, the first wire 532 and the second wire 534 are disposed along the inner surface 536 of the down tube 202. In some examples, the first wire 532 and the second wire 534 are disposed in respective channels formed along the inner surface 536 of the down tube 202. In some examples, the channels are formed of the same material as the down tube 202 (e.g., aluminum). In other examples, the channels may be formed through the wall of the down tube 202. In the example shown, the first wire 532 and the second wire 534 are disposed on opposite sides of the down tube 202. This may be beneficial for providing separation between the positive wire and the negative wire. However, in other examples, the first wire 532 and the second wire 534 may be disposed adjacent to each other. In some examples, each of the wires 532, 534 has an insulating sheath. In other examples, the wires 532, 534 may be nested together.

[0070] like Figure 5 and Figure 6 As shown, the seat post 200 includes a valve stem 538 disposed in the shaft 508. The valve stem 538 is aligned along the axis 206 of the seat post 200. The valve stem 538 extends through the shaft 508 and between the valve 520 and the motor assembly 220. The valve stem 538 can rotate in the shaft 508. The end of the valve stem 538 is coupled to the valve 520 and the motor assembly 220. In this way, the motor 522 can be activated to rotate the valve stem 538 to change the state of the valve 520. For example, the motor 522 can be activated to rotate the valve stem 538 in a first direction to open the valve 520 and rotate in a second direction (opposite direction) to close the valve 520. In some examples, the motor 522 is a brushless coreless direct current (DC) motor. In other examples, other types of motors can be implemented. The motor 522 is powered or activated by the control module 222. As described above, wires 532 , 534 are routed through the down tube 202 between the control module 222 and the lower end 210 of the down tube 202 to electrically connect the control module 222 to the motor 522 .

[0071] Figure 8 yes Figure 6 FIG. 6 is an enlarged view of the labeled portion 600 of FIG. 6 , showing an exemplary piston assembly 510 in the upper tube 204. Figure 8As shown, the lower plug 506 is threadedly coupled to the lower end 500 of the upper tube 204, which seals the lower end 500 of the upper tube 204. The seat post 200 includes a shaft seal 800 located between the lower plug 506 and the shaft 508 to prevent leakage through the lower plug 506. The shaft seal 800 also enables the lower plug 506 to slide smoothly up and down along the shaft 508 when the seat post 200 expands and contracts. The seat post 200 includes a first outer seal 802 located between the lower plug 506 and the inner surface 514 of the upper tube 204 and a second outer seal 804 located between the lower plug 506 and the inner surface 536 of the lower tube 202. The seat post 200 also includes a first seal 806 and a second seal 808 between the outer surface 810 of the upper tube 204 and the inner surface 536 of the lower tube 202. In other examples, the seat post 200 may include more or fewer seals and / or the seals may be arranged in other configurations.

[0072] exist Figure 8 In the example shown, the piston assembly 510 includes a piston 512 (which may also be referred to as a valve body). The piston 512 is coupled to the shaft 508. Specifically, in this example, the piston 512 is threadedly coupled to the shaft 508, but in other examples, the piston 512 may be coupled to the shaft 508 via other techniques (e.g., via one or more threaded fasteners). The piston 512 has a head 812 that seals against the inner surface 514 of the upper tube 204. Specifically, in this example, the piston assembly 510 includes a seal 814 (which may be referred to as a chamber seal) around the head 812 to seal against the inner surface 514 of the upper tube 204. In this way, the piston 512 divides the chamber 502 of the upper tube 204 into a first chamber 516 (formed above the head 812) and a second chamber 518 (formed below the head 812). In the example shown, the piston 512 defines a hole 816. The aperture 816 forms part of a passage across the head 812 that fluidly connects the first chamber 516 and the second chamber 518 , as disclosed in further detail herein.

[0073] In the illustrated example, the valve 520 is disposed in the piston 512 and / or is at least partially formed by the piston 512. The valve 520 can be operated between a closed state that blocks fluid from flowing through the piston 512 and an open state that allows fluid to flow through the piston 512. In the illustrated example, the valve 520 includes a first member or disk 818 referred to herein as a fixed disk 818, and a second member or disk 820 referred to herein as a rotatable disk 820 engaged with the fixed disk 818. Each disk 818, 820 has two opposing faces and a peripheral edge. The fixed disk 818 is maintained in a fixed position in the piston 512 (i.e., the fixed disk 818 does not rotate relative to the piston 512). The rotatable disk 820 can rotate relative to the piston 512 and the fixed disk 818. The fixed disk 818 has one or more openings or channels, which, when opened, allow fluid to flow through the piston 512 between the first chamber 516 and the second chamber 518, as disclosed in further detail herein. The rotatable disk 820 can be rotated to open or close the passage in the fixed disk 818, thereby opening or closing the valve 520. The valve stem 538 extends into the hole 816 of the piston 512 and is coupled to the rotatable disk 820. The valve stem 538 can be rotated by the motor 522, which rotates the rotatable disk 820 to open or close the valve 520.

[0074] In the illustrated example, the piston assembly 510 includes a seal 822 (e.g., a squeeze washer) located between the shaft 508 and a shoulder 824 in the piston 512. The seal 822 prevents or limits fluid leakage between the second chamber 518 and the hole 816. The piston assembly 510 also includes a stem seal 826 located between the valve stem 538 and the inner surface of the piston 512. The stem seal 826 is held in place between the first support ring 828 and the second support ring 830. The interior of the shaft 508 can be exposed to the atmosphere at the bottom end. Therefore, the stem seal 826 prevents or limits fluid leakage between the shaft 508 and the upper portion of the hole 816. In some examples, the stem seal 826 also creates a smooth surface for the valve stem 58 to rotate relative to the piston 512.

[0075] In the illustrated example, the seat post 200 includes a travel spacer 832 in the first chamber 516 in the upper tube 204. The travel spacer 832 can slide up and down in the upper tube 204. The piston assembly 510 can engage the travel spacer 832 during the compression movement. In some examples, the travel spacer 832 is constructed of a compliant material (e.g., rubber). The travel spacer 832 occupies excess volume in the first chamber 516 (positive chamber) for different travel heights to maintain the desired air spring rate and travel range. Depending on the desired travel range, travel spacers of different sizes can be used. For example, a taller travel spacer can be used for a reduced travel length, while a shorter travel spacer can be used for an increased travel length.

[0076] Fig. 9 2 is an exploded view of a motor assembly 220 and an exemplary motor assembly housing 900 adjacent the lower end 210 of the down tube 204. When the seat post 200 is assembled, the motor assembly housing 900 is coupled (e.g., threadedly coupled) to the lower end 210 of the down tube 202, and the motor assembly 220 is at least partially disposed in the motor assembly housing 900. In some examples, a first housing screw 902 and a second housing screw 904 are used to couple the motor assembly 220 in the motor assembly housing 900. Fig. 9 Also shown is a seal 906 (eg, an O-ring) which may be disposed between the motor assembly 220 and the motor assembly housing 900 to help dampen vibrations from the motor 522 .

[0077] Fig.10 2 is an exploded view of an exemplary motor assembly 220. The motor assembly 220 includes a gear reduction system or transmission 1001 to reduce the motor 522 and the valve stem 538 ( Figure 5 ) between the output end of the motor assembly 220. In this example, the gear reduction system is a two-stage planetary gear system. The two-stage planetary gear system produces a relatively high gear ratio between the motor 522 and the output end of the motor assembly 220. In the illustrated example, the motor assembly 220 includes a motor 522, a first sun gear 1000 coupled to the output end (e.g., a drive shaft) of the motor 522, a motor seal 1002 (e.g., an O-ring), a motor housing 1004, a motor screw 1006, a first washer 1008, a first set of planetary gears 1010, a first bracket 1012 having a second sun gear 1014, a second washer 1016, a second set of planetary gears 1018, a second bracket 1020, and a cover 1022 having an inner ring gear 1024. A portion of the first wire 532 and the second wire 534 are also Fig.10 The first wire 532 and the second wire 534 are electrically connected to the motor 522 .

[0078] Fig.11 2 is an assembly diagram of the motor assembly 220. Fig.11 As shown, the motor housing 1004 and the cover 1022 are coupled (e.g., via snap fit) and form an entire housing structure. The other parts of the motor assembly 220 and the motor 522 are disposed in the housing structure formed by the motor housing 1004 and the cover 1022. The first wire 532 and the second wire 534 extend along the outside of the motor housing 1004, then bend around the end of the motor housing 1004 and are electrically connected to the motor 522. The second bracket 1020 extends from the cover 1022. As shown in FIG. Fig.10 and Fig.11 As shown, the second bracket 1020 has a notch or slot 1026. When the motor assembly 220 is mounted on the seat post 200 ( Figure 2 ) is on, the valve stem 538( Figure 5 ) extends into the narrow slot 1026, which rotationally connects the second bracket 1020 and the valve stem 538.

[0079] As an example operation, when the motor 522 is activated, the motor 522 rotates the first sun gear 1000. The first sun gear 1000 rotates the first set of planetary gears 1010, which run around the first sun gear 1000 via interaction with the ring gear 1024. The first set of planetary gears 1010 rotates the first carrier 1012. The second sun gear 1014 (which is part of the first carrier 1012) rotates the second set of planetary gears 1018, which run around the second sun gear 1014 via interaction with the ring gear 1024. The second set of planetary gears 1018 rotates the second carrier 1020, which then rotates the valve stem 538 ( Figure 5 ). The motor assembly 220 utilizes the two-stage planetary gear system to produce a relatively high gear ratio between the motor 522 and the second bracket 1020 (the output end of the motor assembly 220). For example, the first planetary gear stage may produce a gear reduction ratio of 5:1, and the second planetary gear stage may also produce a gear reduction ratio of 5:1. Therefore, the two-stage planetary gear system produces a gear reduction ratio of 25:1 (but may be higher or lower in other examples). This provides a large reduction between the motor 522 and the second bracket 1020. This increases the torque output to the second bracket 1020 while still enabling the motor 522 to operate at a relatively high speed, which is generally more efficient and stable. In other examples, the motor assembly 220 may utilize a single-stage planetary gear system or another type of gear reduction system (e.g., a dual gear system). In other examples, the motor assembly 220 may not utilize any gear reduction system. Instead, the output end of the motor 522 may be directly or indirectly coupled to the valve stem 538 without a gear reduction system.

[0080] Fig.12 yes Figure 5 540 is an enlarged view of the labeled portion 540 of , showing a cross-sectional view of the motor assembly 220 mounted on the down tube 202. Fig.13 is along the perpendicular Fig.12 A cross-sectional view of the motor assembly 220 mounted on the down tube 202, taken along the plane of the cross-sectional view in FIG. Fig.12 and Fig.13As shown, the seat post 200 includes a body 1200 that is partially disposed in the lower tube 202 and extends outwardly from the lower end 210 of the lower tube 202. The seat post 200 includes retaining rings 1202, 1204 that are disposed in corresponding recesses formed on the inner surface 536 of the lower tube 202 to secure the body 1200 in the lower tube 202. The shaft 508 extends at least partially into the body 1200. Fig.13 1200. As shown, the seat post 200 includes a first threaded plug 1300 and a second threaded plug 1302 that are threaded into corresponding threaded openings in the body 1200 and extend through a groove formed in the side of the shaft 508. This prevents the shaft 508 from linearly moving and / or rotating relative to the body 1200. In this way, the body 1200 fixedly retains the shaft 508 in the down tube 202, thereby coupling the shaft 508 to the down tube 202. In the example shown, the seat post 200 includes a plate 1206 and a disk 1208 located in the down tube 202 above the body 1200. The wires 532, 534 extend through openings or recesses in the disk 1208, the plate 1206, and the body 1200.

[0081] In the example shown, the motor assembly housing 900 is threadedly coupled to the body 1200 and engages the lower end 210 of the down tube 202. Fig.12 As shown, the motor assembly housing 900 has openings 1210, 1212. The first wire 532 and the second wire 534 extend through the openings 1210, 1212, extend along the outside of the motor assembly housing 900, wrap around the bottom of the motor assembly housing 900, and extend into the motor assembly 220 to connect to the motor 522. Therefore, in this example, a portion of the first wire 532 and the second wire 534 are exposed to the outside of the motor assembly housing 900. However, when the seat post 200 is coupled to the bicycle 100 ( Figure 1 ), the motor assembly housing 900 is disposed on the seat tube 114 ( Figure 1 ), and thus the first wire 532 and the second wire 534 are connected by the frame 102 ( Figure 1 ) protection. In other examples, the wires 532, 534 can be routed differently so that they are completely covered in the motor assembly housing 900. In some examples, the wires 532, 534 are directly connected to the motor 522. In other examples, the wires 532, 534 can be connected to the motor 522 via a quick disconnect between the down tube 202 and the motor assembly housing 900.

[0082] like Fig.12 and Fig.13As shown, the motor assembly 220 is disposed in a motor assembly housing 900. A seal 906 is disposed between the motor assembly housing 900 and the motor housing 1004 and helps to reduce or dampen vibrations from the motor 522. Fig.13 As shown, housing screws 902 , 904 extend through motor assembly housing 900 and into motor housing 1004 and cover 1022 , which couples motor assembly 220 to motor assembly housing 900 .

[0083] like Fig.12 and Fig.13 As shown, the motor 522 is disposed in the motor housing 1004. The motor screws 1006 (one of which is Fig.12 ) is used to couple the motor 522 in the motor housing 1004. In addition, the motor seal 1002 is disposed between the motor 522 and the motor housing 1004 to help retain the motor 522 in the motor housing 1004.

[0084] like Fig.12 and Fig.13 As shown, the gear reduction system 1001 (i.e., a two-stage planetary gear system) is located between the motor 522 and the valve stem 538. The valve stem 538 has a lug 1214 extending into the slot 1026 in the second bracket 1020. In this way, the valve stem 538 and the second bracket 1020 are keyed together. Therefore, when the motor 522 is activated, the motor 522 rotates the second bracket 1020 via the two-stage planetary gear system, and the second bracket 1020 rotates the valve stem 538. The motor 522 is a bidirectional motor that can be activated to rotate the valve stem 538 in either direction. In this example, the lug 1214 has a rectangular cross-sectional shape. In other examples, the lug 1214 and the slot 1026 can be shaped differently.

[0085] Fig.14 508 and the piston assembly 510. The piston assembly 510 is coupled to the shaft 508 at or near the top of the shaft 508. The valve stem 538 is disposed in the shaft 508 and extends through the shaft 508. Fig.14 As shown, the lugs 1214 on the valve stem 538 extend outwardly from the bottom end 1400 of the shaft 508 .

[0086] Fig.15is an exploded view of the piston assembly 510 and the valve stem 538. In the example shown, the piston assembly 510 includes the valve stem seal 826 and support rings 828, 830, the piston 512, the first stop bolt 1500, the second stop bolt 1502, the first stop O-ring 1504 for the first stop bolt 1500, the second stop O-ring 1506 for the second stop bolt 1502, the seal 814, the thrust bearing 1508, the disk key 1510, the rotatable disk 820, the fixed disk 818, the disk seal 1512, and the retaining member (disc cover 1514 in this embodiment).

[0087] When the piston assembly 510 is assembled, the fixed disk 818 and the rotatable disk 820 are stacked together and disposed in the piston 512. In the example shown, the fixed disk 818 has two fixed disk fluid flow passages, which are openings 1516 (e.g., channels, flow paths) in this embodiment, and the rotatable disk 820 has two rotatable disk fluid flow passages, which are recesses 1518 in this embodiment. The openings 1516 extend through the fixed disk 818 in an axial direction. The rotatable disk 820 is rotatable relative to the fixed disk 818 between an open position and a closed position. When the rotatable disk 820 is in the open position, the recesses 1518 at least partially overlap or align with the openings 1516 in the axial direction, which enables fluid to flow across the fixed disk 818 and the rotatable disk 820 between the first chamber 516 and the second chamber 518 ( Figure 5 ). When the rotatable disk 820 is in the closed position, the notch 1518 does not overlap with the opening 1516 in the axial direction, and thus the opening 1516 is blocked by the rotatable disk 820. This prevents or blocks flow between the first chamber 516 and the second chamber 518 across the fixed disk 818 and the rotatable disk 820 ( Figure 5 ).

[0088] In this example, the valve stem 538 is coupled to the rotatable disk 820 via a key 1510. The key 1510 cooperates with the rotatable disk 820 via a keying feature so that rotation of the valve stem 538 causes rotation of the rotatable disk 820. For example, the key 1510 has a protrusion 1520 (one of which is located at Fig.151520). The rotatable disk 820 has a corresponding recess, in this embodiment a notch 1522, to receive the protrusion 1520. This rotationally fixes the disk key 4610 and the rotatable disk 820. In this way, rotation of the disk key 1510 causes rotation of the rotatable disk 820. When the piston assembly 510 is assembled, the valve stem 538 extends into the piston 512 and is coupled to the disk key 1510. For example, the disk key 1510 has a central opening 1524 to receive the valve stem 538. The valve stem 538 has an opening 1526 (e.g., a through hole). The disk key 1510 has a first threaded opening 1528 and a second threaded opening (on opposite sides of the disk key 1510). When the end of the valve stem 538 is inserted into the central opening 1524 in the key 1510, the first stop bolt 1500 and the second stop bolt 1502 are screwed into their respective openings in the key 1510 and extend into the opening 1524 in the valve stem 538. In this way, the valve stem 538 is coupled to the key 1510 via the first stop bolt 1500 and the second stop bolt 1502. Therefore, rotation of the valve stem 538 causes rotation of the key 1510, which causes rotation of the rotatable disk 820. However, in other examples, the key 1510 may not be included, and the valve stem 538 may be directly coupled to the rotatable disk 820.

[0089] exist Fig.15 In the example shown, the piston 512 has a first radial opening 1530 (e.g., a slot, a window) and a second radial opening 1532 on opposite sides of the piston 512. The first radial opening 1530 and the second radial opening 1532 form a radial opening across the piston 512 between the first chamber 516 and the second chamber 518 ( Figure 5 ), as disclosed in further detail herein. Additionally, when the piston assembly 510 is assembled, at least a portion of the first and second stop O-rings 1504, 1506 and the first and second stop bolts 1500, 1502 are disposed in the corresponding first and second radial openings 1530, 1532. This provides a limit or stop to how far the valve stem 538 can rotate in either direction. Thus, this provides a rotation limit to the rotatable disk 820. While in this example, the piston 512 has two radial openings 1530, 1532, in other examples, the piston 512 may have only one radial opening or may have more than two radial openings.

[0090] Figures 16 to 19 Different views of the piston assembly 510 are shown with the valve 520 in a closed state. Fig.16 is a side view of the piston assembly 510 coupled to the valve stem 538. Fig.17 It is along Fig.16 A cross-sectional view of the piston assembly 510 and the valve stem 538 taken along line AA. Fig.18It is along Fig.16 The cross-sectional view taken along line BB of FIG. 81 shows an axial view (eg, a top view) of the fixed disk 818 . Fig.19 It is along Fig.16 820 is a cross-sectional view taken along line CC of , illustrating an axial view (eg, top view) of the rotatable disk 820 in the closed position.

[0091] like Fig.17 As shown, the disk seal 1512, the fixed disk 818, the rotatable disk 820, the disk key 1510 and the thrust bearing 1508 are stacked together and disposed in the hole 816 defined in the piston 512. The disk cover 1514 is coupled (e.g., threadedly coupled) to the piston 512. The disk key 1510 is coupled to the valve stem 538. The protrusion 1520 on the disk key 1510 extends into the recess 1522 in the rotatable disk 820. In this way, the disk key 1510 and the rotatable disk 820 are rotationally constrained. The rotatable disk 820 has two opposite sides or opposite faces and a peripheral edge. In some examples, the rotatable disk 820 is symmetrical and has a constant thickness. In other examples, the rotatable disk 820 may include other keying features (e.g., protrusions) and / or may be asymmetrical and / or have a varying thickness.

[0092] The piston assembly 510 has a central axis 1700 which is aligned with the axis 206 ( Figure 2 ) are aligned or coincident. In some examples, the fixed disk 818 is not axially fixed to the piston 512. However, as Fig.17 As shown, the disk cover 1514 is screwed onto the top of the piston 512. This axially constrains the disk seal 1512, the fixed disk 818, the rotatable disk 820, the disk key 1510, and the thrust bearing 1508 in the bore 816 between the disk cover 1514 and the shoulder 1702 in the piston 512. The tightening of the disk cover 1514 exerts an axial pressure or force on the fixed disk 818 and the rotatable disk 820, which is called the disk preload. The disk preload creates a sealing contact between the fixed disk 818 and the rotatable disk 820 to fluidly separate the first chamber 516 and the second chamber 518 ( Figure 5). In particular, the fixed disk 818 and the rotatable disk 820 form a face seal 1704 between a first face 1706 (e.g., bottom surface) of the fixed disk 818 and a second face 1708 (e.g., top surface) of the rotatable disk 820. The fixed disk 818 and the rotatable disk 820 are oriented so that the first face 1706 and the second face 1708 face or are perpendicular to the axial direction. In other examples, the first face 1706 and the second face 1709 may face each other but not be perpendicular to the axial direction. The disk preload ensures a tight seal along the face seal 1704 to prevent fluid leakage between the fixed disk 818 and the rotatable disk 820. In some examples, the fixed disk 818 and the rotatable disk 820 are made of a relatively hard material. For example, the fixed disk 818 and the rotatable disk 820 may be made of ceramic, such as aluminum oxide (also known as alumina). Using such a material with high surface hardness and low surface friction coefficient produces a relatively tight seal along the face seal 1704. In other examples, the fixed disk 818 and the rotatable disk 820 can be made of other types of ceramics, metals and / or hard polymers. The fixed disk 818 and the rotatable disk 820 can be made of the same material or different materials. In some examples, this type of face seal is also advantageous because it is self-cleaning. In particular, when the rotatable disk 820 rotates to open and close, the rotatable disk 820 wipes or scrapes off debris (e.g., dust, dirt, etc.) from the first face 1706 and the second face 1708. In some examples, oil and / or grease are applied along one or more contact surfaces (e.g., the surface between the face seal 1704, the fixed disk 818 and the disk seal 1512, the surface between the fixed disk 818 and the piston 512, etc.) to reduce friction and improve the sealing function.

[0093] In some examples, the disc seal 1512 is composed of a compliant polymer. In this way, the disc seal 1512 provides a compressive spring force on the fixed disc 818 in the preload direction (axial direction). In some examples, the disc seal 1512 is composed of a Buna-N sealing material. In other examples, the disc seal 1512 can be composed of other materials, such as ethylene propylene diene monomer (EPDM), silicone, and / or Additionally or alternatively, a mechanical spring may be included to provide a disk preload force. Thrust bearing 1508 reduces the rotational friction of disk key 1510 under the disk preload force. In some examples, thrust bearing 1508 is a ball bearing. In other examples, other types of bearings and / or features may be used, such as roller thrust bearings, thrust washers, low friction washers, or low friction surfaces and treatments.

[0094] To prevent the retaining disk 818 from rotating within the bore 816, the retaining disk 818 includes an anti-rotation feature that engages with a corresponding anti-rotation feature of the bore 816 of the piston 512. Fig.18818, and the anti-rotation feature of the hole 816 is a flat surface 1804 that engages with each other to prevent the fixed disk 818 from rotating. In this way, the fixed disk 818 and the piston 512 are keyed together. This prevents the fixed disk 818 from rotating in the piston 512. In some examples, the fixed disk 818 is symmetrical with a constant thickness. In other examples, the fixed disk 818 may include anti-rotation features or key features of other shapes (e.g., protrusions) and / or may be asymmetrical and / or have varying thicknesses.

[0095] Return to reference Fig.17 , the cover 1514 has a first chamber 516 ( Figure 5 ) in the second chamber 518. The fluid can flow through the passage 1710 and enter the opening 1516 in the fixed disk 818. Similarly, the radial openings 1530, 1532 are exposed to the second chamber 518 ( Figure 5 ) and is received in the recess 1518 of the rotatable disk 820. However, as Fig.18 and Fig.19 As shown, the recess 1518 in the rotatable disk 820 is offset or does not overlap with the opening 1516 in the fixed disk 818 in the axial direction. As such, the opening 1516 in the fixed disk 818 is blocked by the rotatable disk 820 (e.g., the second side 1708 of the rotatable disk 820), which blocks or prevents fluid from flowing through the fixed disk 818 and the rotatable disk 820. This prevents fluid from flowing through the piston 512 between the first chamber 516 and the second chamber 518.

[0096] like Fig.16 As shown, when the valve 520 is in the closed position, the first stop bolt 1500 and / or the first stop O-ring 1504 engages with the end 1600 (e.g., the stop surface) of the first radial opening 1530. This limits or prevents the valve stem 538 from rotating further in the counterclockwise direction (when the valve stem 538 is rotated from the closed position). Fig.18 and Fig.19 Observe). Thus, when the valve 520 is in the closed state, this forms a stop. The first stop O-ring 1504 provides a cushion against the end 1600. The second stop O-ring 1504 ( Fig.15 ) and / or the second stop bolt 1502 ( Fig.15 ) is similarly engaged with the end of the second radial opening 1532.

[0097] Figure 20 to Figure 23 is with Figures 16 to 19 A similar view of a similar piston assembly 510 and valve stem 538, but showing valve 520 in an open state. In particular, Fig. 20 is a side view of a piston assembly 510 coupled to a valve stem 538, Fig.21 It is along Fig. 20 A cross-sectional view taken along line DD, Fig. 22 It is along Fig. 20 A cross-sectional view taken along line EE of Fig.23 It is along Fig. 20 The valve stem 538 has passed through the motor assembly 220 ( Figure 2 ) is rotated about a quarter turn (e.g., 90°). Fig. 22 and Fig.23 As shown, the recess 1518 in the rotatable disk 820 at least partially overlaps with the opening 1516 in the fixed disk 818 in the axial direction. In this way, the fluid can flow through the opening 1516 in the fixed disk 818 in the axial direction and flow between the first chamber 516 and the second chamber 518 ( Figure 5 ).like Fig.21 As shown, the recess 1518 of the rotatable disk 820 is aligned (in a radial direction) with the first radial opening 1530 and the second radial opening 1532 in the piston 512 . Fig.21 21. As shown, during contraction of the seatpost 200, fluid can flow from the first chamber 516 (from above the piston 512), through the passage 1710 in the disk cover 1514, across the fixed disk 818 and the rotatable disk 820, and through the radial openings 1530, 1532 and into the second chamber 518 (below the piston 512). During expansion of the seatpost 200, the fluid can also flow in the opposite direction. Thus, when the valve 520 is in an open state, the fluid can flow between the first chamber 516 and the second chamber 518 across the piston 512. As described above, the opening 1516 in the fixed disk 818 is aligned or oriented in the axial direction. As such, when the valve 520 is in an open state, the fluid flows through the opening 1516 and through the fixed disk 818 in the axial direction.

[0098] like Fig. 20 As shown, the first stop bolt 1500 and / or the first stop O-ring 1504 engage with the opposite end 2000 of the first radial opening 1530. The second stop bolt 1502 ( Fig.15 ) and / or a second stop O-ring 1506 ( Fig.15 ) is similar to the second radial opening 1532 ( Fig.15 ) end engages. This limits or prevents further rotation of the valve stem 538 in the clockwise direction (when the valve stem 538 is rotated from Fig. 22 and Fig.23Observe). In this way, the interface between the first stop bolt 1500 and the second stop bolt 1502 and the first radial opening 1530 and the second radial opening 1532 forms a rotation limit of the rotatable disk 820. In this example, the rotatable disk 820 can rotate about a quarter turn (e.g., 90°) between the open position and the closed position. However, in other examples, the piston assembly 510 can be configured to rotate the rotatable disk 820 by different rotation amounts to open / close the valve 520. For example, the size of the radial openings 1530, 1532 can be increased or decreased to achieve a greater or lesser amount of rotation.

[0099] like Fig.18 and Fig. 22 As shown, the opening 1516 in the fixed disk 818 is fan-shaped. In other examples, the opening 1516 can be shaped differently (e.g., circular, triangular, etc.). In addition, although the fixed disk 818 has two openings 1516 in the example shown, in other examples, the fixed disk 818 can have only one opening, or can have more than two openings (e.g., three, four, five, etc.). In addition, the opening 1516 can be of different shapes or sizes. In some examples, the opening 1516 can be formed by a notch in the fixed disk 818 instead, which is similar to the rotatable disk 820. Similarly, although the rotatable disk 820 has two notches 1518, in other examples, the rotatable disk 820 can have more or less notches and / or the notches can be formed by openings or other types of flow passages instead. Although in this example, the fixed disk 818 is above the rotatable disk 820, in other examples, the piston assembly 510 can be arranged so that the rotatable disk 820 is above the fixed disk 818.

[0100] As can be appreciated, valve 520 is a non-volume displacement valve. This means that first chamber 516 ( Figure 5 ) does not change between the open and closed valve states, and the second chamber 518 ( Figure 5 ) does not change between the open and closed valve states. This reduces the power consumption of the motor 522 (compared to other types of valves that require higher power to overcome the biasing force acting on the flow control member of the valve. Figure 5 ) The amount of power used to open or close the valve 520. In addition, the exemplary valve 520 uses a hardened disk rather than a polymer-type seal, which becomes sticky and requires an opening force to open. In addition, due to the inherent friction in the system, this type of valve is self-locking. In other words, once the valve 520 is in an open or closed state, the motor 522 can be deactivated and the valve 520 remains in the same state. Therefore, there is no need to maintain power in one state or the other. This helps save battery life because battery power is only used to open and close the valve 520.

[0101] As described above, the motor 522 ( Figure 5 ) by the control module 222 ( Figure 2 ) of the processor circuit 410 ( Figure 4 ) control. The processor circuit 410 of the control module 222 can activate the motor 522 to rotate the rotatable disk 820 between the open position and the closed position. In some examples, the motor assembly 220 ( Figure 2 ) does not use a position encoder. Instead, the processor circuit 410 can use the motor current consumption to determine when the valve 520 is in an open or closed state. In some examples, the processor circuit 410 can determine when to deactivate the motor 522 based on a sensed change (e.g., increase) in the current of the motor 522. For example, when stationary and not actuated, the valve 520 remains in a closed state ( Figure 16 to Figure 17 When the rider presses the handlebar 118 ( Figure 1), the processor circuit 410 applies voltage to the motor 522, and the motor 522 draws the current required to open the valve 520. When the first and second stop O-rings 1504, 1506 and / or the first and second stop bolts 1500, 1502 contact the ends of the radial openings 1530, 1532, this prevents further rotation of the valve stem 538, and the motor 522 begins to draw more current. The processor circuit 410 senses the increase in current draw, and in response to the sensed increase, turns off or deactivates the motor 522 (e.g., stops powering the motor 522). In some examples, the processor circuit 410 senses the increase and deactivates the motor 522 before the stall / lock current, which protects the components of the motor assembly 220 from over-torque and overheating of the motor 522, and saves battery energy. The valve 520 is maintained in the open state by its latching function discussed previously. When the valve 520 is open, the seat post 200 can be retracted to lower the seat 110. In some examples, the motor 522 rotates with a positive voltage in the closing direction and with a negative voltage in the opening direction, or vice versa. When the rider releases the post actuation button 117, the processor circuit 410 applies an opposite voltage to the motor 522, and the motor 522 draws the current required for it to begin moving back to the closed state. When the first and second stop o-rings 1504, 1506 and / or the first and second stop bolts 1500, 1502 contact the ends of the radial openings 1530, 1532, the motor 522 begins to draw more current again. The processor circuit 410 senses the increased current draw and turns off or deactivates the motor 522. The cycle is completed with the valve 520 in the closed state. Thus, when the rider presses the seat post actuation button 117, the motor 522 is activated to open the valve 520 and then deactivated (while the valve 520 remains in the open state), and when the rider releases the seat post actuation button 117, the motor 522 is activated to close the valve 520 and then deactivated (while the valve 520 remains in the closed state). Thus, in this example, a position encoder is not used. This reduces complexity and cost compared to known seat post motor systems. However, in other examples, a position encoder or position sensor may be used to determine when to stop the motor 522 in the open position and the closed position. In such an example, the stop bolts 1500, 1502 may not be used. In some examples, the current ripple in the motor current may be counted or used to determine the open stop position, the closed stop position, or an intermediate position. In some examples, magnetic sensing may also be used to determine the open stop position, the closed stop position, or an intermediate position.

[0102] Although in Figures 2 to 23In the example of FIG. 2 , the motor assembly 220 is coupled to and / or otherwise disposed on the lower end 210 of the lower tube 202 , but in other examples, the motor assembly 220 may be adjacent to the piston assembly 510 within the upper tube 204 . For example, Fig.24 2 is a cross-sectional view of the seat post 200, wherein the motor assembly 220 is coupled to or incorporated into the piston assembly 510. Thus, the motor assembly 220 is disposed within the upper tube 204 around the overlapping region of the upper tube 204 and the lower tube 204. Fig.25 yes Fig.24 2400, showing the lower end 210 of the lower tube 202. In this example, the cover 2500 is coupled to the body 1200. The cover 2500 may not be airtight, so that the third chamber 526 in the lower tube 202 may be open to the atmosphere. Fig.25 As shown, the first wire 532 and the second wire 534 extend around the bottom end of the shaft 508 and then extend into the shaft 508 until the motor assembly 220 ( Fig.24 ).

[0103] Fig.26 yes Fig.24 24, and the piston assembly 510 and the motor assembly 220 in the upper tube 204 are shown in an enlarged view of the marked portion 2402 of the upper tube 204. The motor assembly 220 is coupled to the piston 512 and is disposed in the upper tube 204. Specifically, in this example, the motor housing 1004 is coupled to the top end of the shaft 508, and the piston 512 is coupled (e.g., threadedly coupled) to the top of the motor housing 1004. In this way, the piston 512 is above the motor assembly 220 in the upper tube 204. The motor 522 and other planetary gear components are disposed in the motor housing 1004. The motor 522 and other motor assembly components are exposed to atmospheric pressure via the shaft 508. In the example shown, the valve stem 538 is relatively short and extends between the second bracket 1020 and the key 1510. The valve stem seal 826 and the valve motor seal 2600 isolate the atmospheric pressure in the motor assembly 220 from the pressurized gas in the first chamber 516 (positive chamber) and the second chamber 518 (negative chamber). The first and second wires 532, 534 extend through the shaft 508 and into the motor housing 1004 and are electrically connected to the motor 522. The remainder of the valve 520 and motor assembly 220 are substantially the same as disclosed above and will not be repeated here.

[0104] In the examples disclosed above, the motor assembly 220 is located in the atmospheric pressure region. However, in other examples, the motor assembly 220 may be located in a positive pressure region or a negative pressure region (e.g., in the first chamber 516 or the second chamber 518). In some examples, the motor assembly 220 and / or the wires 532, 534 may have a sealing surface so that they are partially located in a positive pressure region or a negative pressure region on one side of the seal and partially located in an atmospheric pressure region on the other side of the seal. In some examples, the battery 404 and / or the control housing 402 may be installed in a positive pressure region or a negative pressure region. In some examples, instead of the motor 522, a solenoid may be used to control the valve 520.

[0105] In some examples disclosed herein, the power source for the seat post 200 is a battery 404 ( Figure 4 ), which can be easily removed from the seat post 200 by a user, such as by pressing a release lug or button or by removing the seat post 200 from the control housing 402 ( Figure 4 ). However, in other examples, the battery 404 may be secured to the seat post 200 in a manner that requires disassembly for removal (e.g., removal of one or more screws). The battery 404 may have a charging port or contact surface for charging. The battery 404 may be located in a variety of locations, such as the clamp 116 ( Figure 1 )、Ring 400( Figure 4 ) or the lower end 210 of the lower tube 202. The battery 404 can be oriented horizontally, vertically, or at an angle. Figure 4 , battery 404 is oriented horizontally. Fig. 27 and Fig.28 An example of a seat post 200 is shown in which the battery 404 is oriented vertically. Fig. 27 and Fig.28 In the example of FIG. 4 , the control housing 402 and the battery 404 are spaced apart from the down tube 202. This reduces or eliminates the possibility of the seat post 200 being mounted on the bicycle 100 ( Figure 1 ) when the fixture 116 ( Figure 1 ). In some examples, such as Fig. 27 and Fig.28As shown, the control module 222 includes a control button 2700 and a light 2702 (e.g., a light emitting diode (LED)). The button 2700 can be used to turn on / off the control module 222 and / or various functions of the control module 222. The light 2702 can illuminate (e.g., flash, remain solid, switch colors, etc.) to indicate different modes or states of the control module 222. For example, the button 2700 can be pressed to initiate a pairing process for pairing the seat post assembly with the seat post actuation button 117 on the handlebar and / or other devices such as the bicycle computer 109. In response to the button 2700 being pressed, the light 2702 can flash, indicating that the pairing process has begun. Once the seat post assembly 200 and the wireless actuator 117 have been successfully paired, the light 2702 can flash rapidly to indicate to the rider that the pairing is successful. In some examples, the battery 404 can be located in front of the down tube axis or behind the down seat tube axis. In other examples, the battery 404 can be located on either side of the down tube axis such that the center plane of the bicycle 100 does not intersect the battery 404. The battery 404 can also be mounted remote from the seat post 200 and connected to the seat post 200 by a wire (e.g., one or more wires extending through or along the frame 102). The battery 404 can be charged by wire or wirelessly.

[0106] As can be appreciated, the example valve or motor assembly disclosed herein does not require a position encoder as seen in known lift seat post actuation systems. Therefore, the examples disclosed herein reduce the complexity and cost associated with height adjustable seat posts. In addition, the example valve disclosed herein is a rotary valve that operates by rotating a rotatable disk to open / close the valve. This rotational motion does not affect the volume of the fluid (e.g., pressurized gas) in the first chamber 516 and the second chamber 518. Therefore, this type of non-volume displacement valve is advantageous because it requires relatively low power to change the valve state. This type of valve is also advantageous because it is self-latching, meaning that the valve remains in an open or closed state when the motor is deactivated. This reduces the power consumption of the motor assembly.

[0107] Although the example piston assemblies, valves, and motor assemblies disclosed herein are described in conjunction with a seat post having a pneumatic platform, the examples disclosed herein may also be used in conjunction with a hydraulic platform. For example, instead of having the pneumatic chambers filled with pressurized gas, the chambers 516, 518 may be filled with a hydraulic fluid, such as oil. Also, although the examples disclosed herein utilize a battery in the control module as a power source to start the motor, in other examples, the motor may be started from another power source, such as an electric bicycle battery or from another battery attached to the bicycle.

[0108] The exemplary piston assembly, valve and motor assembly can also be used in other types of bicycle components. For example, any of the exemplary piston assembly, valve and motor assembly can be used in suspension components (e.g., shock absorber, front fork). Suspension components generally include a first tube and a second tube arranged in a telescopic arrangement. The exemplary piston assembly and valve disclosed herein can be used as a damper or spring component to control the flow of fluid between two chambers in one or more tubes.

[0109] Disclosed herein are exemplary systems, devices, and articles for use with bicycles (and / or other vehicles). Examples and combinations of examples disclosed herein include the following:

[0110] Example 1 is a height-adjustable seat post for a bicycle. The height-adjustable seat post includes an upper tube and a lower tube configured in a telescopic arrangement. The lower tube is used to connect to the frame of the bicycle, and the upper tube is used to connect to the seat. The height-adjustable seat post includes a piston in the upper tube. The piston divides the upper tube into a first chamber and a second chamber. The first chamber and the second chamber are filled with a fluid. The height-adjustable seat post also includes a valve, which includes a fixed member and a rotatable member, forming a face seal between a first face of the fixed member and a second face of the rotatable member. The fixed disk has a fluid flow path. The rotatable disk can rotate relative to the fixed disk between a closed position and an open position, in which the rotatable member blocks the fluid flow path to prevent the fluid from flowing between the first chamber and the second chamber, and in the open position, allows the fluid to flow through the fluid flow path between the first chamber and the second chamber.

[0111] Example 2 includes the height adjustable seatpost of Example 1, wherein the fixed member includes a fixed disk and the rotatable member includes a rotatable disk, the fixed disk and the rotatable disk being disposed in a bore defined in the piston.

[0112] Example 3 includes the height adjustable seatpost of Example 2, wherein the fixed plate includes an anti-rotation feature that engages with a corresponding anti-rotation feature of the aperture to prevent the fixed plate from rotating in the piston.

[0113] Example 4 includes the height adjustable seatpost of Example 3, wherein the anti-rotation feature of the fixed plate includes a flat edge with a flat side on the peripheral edge of the fixed plate, and the anti-rotation feature of the hole includes a matching flat surface that engages with the flat surface of the fixed plate to prevent the fixed plate from rotating in the piston.

[0114] Example 5 includes the height adjustable seatpost of any of Examples 2-3, wherein the fixed plate and the rotatable plate are constructed of ceramic.

[0115] Example 6 includes the height adjustable seatpost of any of Examples 2-4, wherein the fixed plate and the rotatable plate are constructed of aluminum oxide.

[0116] Example 7 includes the height adjustable seat post of any of Examples 1-5, further comprising: a valve stem coupled to the rotatable disk; and a motor assembly including a motor for rotating the valve stem.

[0117] Example 8 includes the height adjustable seat post of Example 7, further comprising a disk key, the valve stem coupled to the disk key, the disk key cooperating with the rotatable disk via a keying feature such that rotation of the valve stem causes rotation of the rotatable disk.

[0118] Example 9 includes the height adjustable seat post of Example 8, wherein the piston has a radial opening, the valve stem and the disk key are coupled by a bolt, and at least a portion of the bolt is disposed in the radial opening.

[0119] Example 10 includes the height adjustable seatpost of Example 9, wherein the radial opening forms a portion of a flow path between the first chamber and the second chamber when the rotatable disk is in the open position.

[0120] Example 11 includes the height adjustable seatpost of any of Examples 7 to 10, wherein the motor assembly includes a gear reduction system between the motor and the stem.

[0121] Example 12 includes the height adjustable seatpost of Example 11, wherein the gear reduction system is a two-stage planetary gear system.

[0122] Example 13 includes the height adjustable seatpost of any of Examples 7-12, wherein the motor assembly is coupled to the lower end of the down tube.

[0123] Example 14 includes the height adjustable seat post of Example 2, further comprising a shaft coupled to the lower tube and extending into the upper tube, the piston coupled to the shaft, a valve stem extending through the shaft between the piston and the motor assembly, the valve stem rotatable in the shaft.

[0124] Example 15 includes the height adjustable seatpost of any of Examples 7-12, wherein the motor assembly is coupled to the piston and disposed in the upper tube.

[0125] Example 16 includes the height adjustable seatpost of any of Examples 7 to 15, the seatpost further comprising: a control module for activating the motor, the control module coupled to the outer surface of the down tube; and a wire extending between the control module and the motor through the down tube.

[0126] Example 17 includes the height adjustable seatpost of Example 16, wherein the control module is coupled to the down tube near an upper end of the down tube.

[0127] Example 18 includes the height adjustable seatpost of example 16 or 17, wherein the control module is configured to: activate the motor to rotate the rotatable disk between the open position and the closed position; and deactivate the motor based on a sensed change in current of the motor.

[0128] Example 19 is a bicycle component comprising a first tube and a second tube configured in a telescopic arrangement and a piston in the first tube. The piston divides the first tube into a first chamber and a second chamber. The first chamber and the second chamber are filled with a fluid. The bicycle component also includes a valve that can be operated between a closed state and an open state, in which the fluid is prevented from flowing through the piston between the first chamber and the second chamber to hold the first tube and the second tube in place, and in which the fluid is enabled to flow through the piston between the first chamber and the second chamber to enable the first tube and the second tube to move toward or away from each other. The valve includes a fixed disk and a rotatable disk disposed in a hole in the piston. The fixed disk has a fixed disk fluid flow path extending through the fixed disk in an axial direction. The rotatable disk can rotate relative to the fixed disk to switch the valve between a closed state and an open state.

[0129] Example 20 includes the bicycle component of Example 19, wherein the fluid is a pressurized gas.

[0130] Example 21 includes the bicycle component of Example 19 or 20, wherein the pressurized gas in the first chamber biases the first tube and the second tube away from each other, and the pressurized gas in the second chamber biases the first tube and the second tube toward each other.

[0131] Example 22 includes the bicycle component according to any one of Examples 19-21, further comprising a retaining member coupled to the piston to exert an axial force on the fixed disk and the rotatable disk to provide a sealing engagement between the fixed disk and the rotatable disk.

[0132] Example 23 includes the bicycle component of Example 22, further comprising a disc seal and a thrust bearing in the bore of the piston, the fixed disc and the rotatable disc being disposed between the disc seal and the thrust bearing, the disc seal providing a compression spring force on the fixed disc, and the thrust bearing reducing rotational friction.

[0133] Embodiment 24 includes the bicycle component of any one of Embodiments 19 to 23, further comprising: a valve stem for rotating the rotatable disk; and a motor for rotating the valve stem.

[0134] Example 25 includes the bicycle component of any of Example 24, further comprising a two-stage planetary gear system between the motor and the valve stem.

[0135] Example 26 includes the bicycle component of any one of Examples 19 to 25, wherein the rotatable disk has a rotatable disk fluid flow path, and wherein, when the valve is in a closed state, the rotatable disk fluid flow path does not overlap with the fixed disk fluid flow path in the axial direction, and when the valve is in an open state, the rotatable disk fluid flow path at least partially overlaps with the fixed disk fluid flow path in the axial direction.

[0136] Example 27 includes the bicycle component of Example 26, wherein the fixed plate has two fixed plate fluid flow passages and the rotatable plate has two rotatable plate fluid flow passages.

[0137] The illustrations of the embodiments described herein are intended to provide a general understanding of the structures of the various embodiments. The illustrations are not intended to be used as a complete description of all elements and features of the devices and systems utilizing the structures or methods described herein. Upon reading this disclosure, many other embodiments may be apparent to those skilled in the art. Other embodiments may be utilized and derived from this disclosure so that structural and logical replacements and changes may be made without departing from the scope of this disclosure. In addition, the illustrations are merely representative and may not be drawn to scale. Certain proportions in the illustrations may be exaggerated, while other proportions may be minimized. Therefore, this disclosure and the accompanying drawings should be considered illustrative rather than restrictive.

[0138] Although this specification contains many details, these details should not be interpreted as limitations on the scope of the present invention or the content that can be claimed, but as descriptions of features specific to a particular embodiment of the present invention. Certain features described in the context of a separate embodiment in this specification may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination. In addition, although features may be described above as acting in certain combinations and even initially claimed as such, in some cases, one or more features from the claimed combination may be removed from the combination, and the claimed combination may involve a sub-combination or a variation of the sub-combination.

[0139] Although specific embodiments have been shown and described herein, it should be understood that any subsequent arrangement designed to achieve the same or similar purpose may replace the specific embodiments shown. The present disclosure is intended to cover any and all subsequent modifications or variations of the various embodiments. Combinations of the above embodiments and other embodiments not specifically described herein will be apparent to those skilled in the art upon reading the specification.

[0140] The Abstract of the present disclosure is provided to comply with 37 CFR §1.72(b) and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, various features may be grouped together or described in a single embodiment for the purpose of simplifying the disclosure. This disclosure should not be interpreted as reflecting an intention that the claimed embodiments require more features than those expressly recited in each claim. On the contrary, as reflected in the following claims, the inventive subject matter may involve features that are less than all the features of any disclosed embodiment. Therefore, the following claims are incorporated into the Detailed Description, with each claim independently serving as a definition of separately claimed subject matter.

[0141] It is intended that the foregoing detailed description be considered illustrative rather than restrictive, and it should be understood that the appended claims, including all equivalents, are intended to define the scope of the invention. The claims should not be understood to be limited to the described order or elements unless otherwise stated. Therefore, all embodiments falling within the scope and spirit of the appended claims and their equivalents are claimed as the present invention.

Claims

1. A height-adjustable seat post for a bicycle, the height-adjustable seat post include: an upper tube and a down tube, the upper tube and the down tube being configured in a telescoping arrangement, the down tube being adapted to be coupled to a frame of the bicycle and the upper tube being adapted to be coupled to a seat; a piston, the piston being located in the upper tube, the piston dividing the upper tube into a first chamber and a second chamber, the first chamber and the second chamber being filled with a fluid; as well as A valve comprising a fixed member and a rotatable member, wherein the fixed member and the rotatable member form a face seal between a first face of the fixed member and a second face of the rotatable member, wherein the fixed member has a fluid flow passage, and the rotatable member is rotatable relative to the fixed member between a closed position and an open position, wherein in the closed position, the rotatable member blocks the fluid flow passage to prevent fluid from flowing between the first chamber and the second chamber, and in the open position, fluid is able to flow between the first chamber and the second chamber through the fluid flow passage.

2. The height-adjustable seat post according to claim 1, in, The stationary member includes a stationary disk and the rotatable member includes a rotatable disk, the stationary disk and the rotatable disk being disposed in a bore defined in the piston.

3. The height-adjustable seat post according to claim 2, in, The retaining disk includes an anti-rotation feature that engages a corresponding anti-rotation feature of the bore to prevent the retaining disk from rotating within the piston.

4. The height-adjustable seat post according to claim 2, in, The fixed disk and the rotatable disk are composed of ceramic.

5. The height-adjustable seat post according to claim 1, wherein the height-adjustable seat post further comprises: include: a valve stem coupled to the rotatable disk; as well as A motor assembly includes a motor for rotating the valve stem.

6. The height-adjustable seat post of claim 5, further comprising a key, the valve stem being coupled to the key, the key cooperating with the rotatable member via a keying feature such that rotation of the valve stem causes rotation of the rotatable member.

7. The height-adjustable seat post according to claim 5, in, The motor assembly includes a gear reduction system between the motor and the valve stem.

8. The height-adjustable seat post according to claim 5, in, The motor assembly is coupled to the lower end of the down tube.

9. The height adjustable seat post of claim 8, further comprising a shaft coupled to the lower tube and extending into the upper tube, the piston coupled to the shaft, the valve stem extending through the shaft between the piston and the motor assembly, the valve stem being rotatable in the shaft.

10. The height-adjustable seat post according to claim 5, in, The motor assembly is coupled to the piston and disposed in the upper tube.

11. The height-adjustable seat post according to claim 5, wherein the height-adjustable seat post further comprises: include: a control module, the control module being used to start the motor, the control module being coupled to an outer surface of the lower tube; as well as Wires extend through the down tube between the control module and the motor.

12. The height-adjustable seat post according to claim 11, in, The control module is configured to: activating the motor to rotate the rotatable disk between the open position and the closed position; and The motor is deactivated based on a sensed change in current supplied to the motor.

13. A bicycle component, the bicycle component include: a first tube and a second tube configured in a telescopic arrangement; a piston located in the first tube, the piston dividing the first tube into a first chamber and a second chamber, the first chamber and the second chamber being filled with a fluid; as well as A valve capable of operating between a closed state and an open state, in which the fluid is prevented from flowing across the piston between the first chamber and the second chamber to hold the first tube and the second tube in place, and in which the fluid is able to flow across the piston between the first chamber and the second chamber to enable the first tube and the second tube to move toward or away from each other, the valve comprising a fixed disk and a rotatable disk disposed in a hole in the piston, the fixed disk having a fixed disk fluid flow path extending through the fixed disk in an axial direction, the rotatable disk being rotatable relative to the fixed disk to switch the valve between the closed state and the open state.

14. The bicycle component according to claim 13, in, The fluid is a pressurized gas.

15. The bicycle component according to claim 14, in, The pressurized gas in the first chamber biases the first tube and the second tube away from each other, and the pressurized gas in the second chamber biases the first tube and the second tube toward each other. 16 . The bicycle component according to claim 13 , further comprising a retaining member coupled to the piston to exert an axial force on the fixed disk and the rotatable disk to provide a sealing engagement between the fixed disk and the rotatable disk.

17. The bicycle component according to claim 16, further comprising a disc seal and a thrust bearing in the bore of the piston, the fixed disc and the rotatable disc being disposed between the disc seal and the thrust bearing, the disc seal providing a compression spring force on the fixed disc, the thrust bearing reducing rotational friction.

18. The bicycle component according to claim 13, wherein the bicycle further comprises: include: a valve stem, the valve stem being used to rotate the rotatable disk; as well as A motor is used to rotate the valve stem.

19. The bicycle component according to claim 18, further comprising a two-stage planetary gear system between the motor and the valve stem.

20. The bicycle component according to claim 18, in, The rotatable disk has a rotatable disk fluid flow path, and wherein, when the valve is in the closed state, the rotatable disk fluid flow path does not overlap with the fixed disk fluid flow path in the axial direction, and when the valve is in the open state, the rotatable disk fluid flow path at least partially overlaps with the fixed disk fluid flow path in the axial direction.

21. The bicycle component according to claim 20, in, The fixed disk has two fixed disk fluid flow passages, and the rotatable disk has two rotatable disk fluid flow passages.

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