Switch valve structure of lifting seat tube

Abstract

The invention relates to a lifting seat tube switch valve structure which comprises a seat tube, a seat rod capable of stretching and retracting relative to the seat tube, a valve group arranged in the seat rod, and a driving module arranged at the bottom of the seat tube and capable of selectively opening and closing the valve group. The seat tube is internally provided with a sliding cavity for the seat rod to slide, a valve rod is arranged between the valve group and the driving module, a switch of the valve group is controlled through the valve rod, the driving module comprises a motor, a turntable and a guide cylinder, opposite cam guide edges are arranged on the periphery of the turntable, and the cam guide edges are arranged on the guide cylinder. And the linear motion is converted into the linear motion of the valve rod through a pin roller and a sleeve head structure, so that a valve piece is pushed to open and close a valve hole, and therefore, the lifting seat tube switch valve structure which is simple in structure, stable in locking and smooth in action can be formed, and the overall durability and the operation stability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a lifting seat tube switch valve structure, mainly applied to the technical field of bicycles and electric bicycles. BACKGROUND

[0002] Bicycles are generally powered by human pedaling, and have energy-saving and environmentally friendly characteristics, so they are often used as general transportation tools or leisure sports devices. With the progress of vehicle technology and road improvement, their performance and quality continue to improve. For example, seat cushions are generally provided with seat cushion height adjustment devices to meet the height requirements of different users. This device is arranged between the seat tube and the seat rod, and the relative position of the two is changed through linear displacement to achieve the effect of height adjustment. Depending on the actuation method, existing technologies can be mainly divided into the following three categories: mechanical type, mainly using mechanical structures to actuate to change the relative height position of the seat tube and the seat rod, simple structure, but limited adjustment flexibility; gas and oil pressure type, using gas pressure components, oil pressure components, or both, to achieve height adjustment through gas and oil path control. This type of device needs to control the valve rod opening and closing through the brake group to switch the gas and oil path state.

[0003] Later, the industry developed an adjustable seat tube assembly for a bicycle, as disclosed in Taiwan Patent No. M475392. When adjusting the height of the seat rod, a motor is controlled to start through wireless transmission, so that a control rod can push a valve rod to produce linear displacement when driven by the motor, to switch the oil path connection state in a valve seat. In this way, the seat rod can be raised or lowered relative to the seat tube to achieve the effect of height adjustment. Although this design avoids the layout problem of steel cables or oil pipes, the cam block only contacts the valve rod on one side and bears the thrust, which is prone to deflection and uneven stress. After long-term use, it is difficult to stably push the valve rod, reducing the overall reliability.

[0004] Therefore, the industry developed another lifting seat tube drive module improvement, as disclosed in Taiwan Patent No. M671815. When adjusting the height of the seat rod, the motor of the drive module is used to rotate the track column, and through the guide rod, the linear track and the perforation, the push sleeve is formed to move linearly, and then the valve nozzle of the valve rod is pushed to produce linear displacement, to switch the oil path connection state in a valve seat. In this way, the seat rod can be raised or lowered relative to the seat tube to achieve the effect of height adjustment. However, this design uses the motor to actuate the track column, and then uses the limiting sleeve on both sides to actuate the push sleeve to actuate the valve rod indirectly. The two guide rods are separated, and the push sleeve needs to be set. Not only does this make the overall structure complex, but also the drive module may be loose due to vibration, causing the two guide rods to shake and deviate, affecting the smoothness and stability of the operation, reducing the reliability of the lifting switch, and also reducing the durability and operation convenience of the overall lifting seat tube.

[0005] Therefore, the valve group switching control of the aforementioned existing lifting seat pipe directly affects the functionality of the utility, and needs to be further improved. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a lifting seat pipe switch valve structure, which can directly actuate the valve rod of the valve group by the driving module, effectively simplifying the structure, avoiding the assembly complexity and actuation error caused by indirect mechanism in the prior art, thereby ensuring that the seat rod height adjustment operation can be quickly and accurately performed. Secondly, the direct driving method is used to avoid the uneven stress of the single-sided cam or separate guide rod, thereby preventing shaking and deviation, making the valve group switching oil path more reliable, and prolonging the service life of the overall device. Thirdly, the bidirectional screws are arranged at both ends of the driving module to stably lock the driving module in the seat pipe, which not only improves the installation convenience and fixing strength, but also effectively resists the vibration generated during riding, prevents loosening and displacement, further improves the durability and operation safety of the lifting seat pipe, and overcomes the shortcomings of the prior art.

[0007] To solve the above technical problems, the present application adopts the following technical scheme: a lifting seat pipe switch valve structure, comprising: a seat pipe, a seat rod, a valve group and a driving module; the seat pipe has a sliding chamber; the seat rod can be extended and retracted in the sliding chamber relative to the seat pipe, and the seat rod has a hollow chamber; the valve group is arranged in the hollow chamber inside the seat rod, so that the hollow chamber forms a first chamber and a second chamber; the valve group has a valve hole and a valve piece, the valve piece can selectively close or open the valve hole to control the fluid communication between the first chamber and the second chamber; the driving module is arranged at the bottom of the seat pipe and connected with the valve group; the driving module comprises a motor, a rotating disc and a guide cylinder, wherein the rotating disc can be actuated by the motor, and the peripheral edge of the rotating disc has two opposite cam guide edges for crossing a roller; the guide cylinder is fixedly arranged in the seat pipe, and two long guide holes are formed on the guide cylinder to limit the axial sliding of the roller, so that the roller can push a valve rod to selectively drive the valve piece to open or close the valve hole, thereby controlling the extension and retraction of the seat rod.

[0008] Preferably, the bottom of the seat pipe is provided with a bottom cover, and the inner walls of the opposite ends of the bottom cover and the seat pipe are respectively formed with a first inner threaded segment and a second inner threaded segment in opposite directions; the outer edge of the guide cylinder is respectively formed with a first outer threaded segment and a second outer threaded segment corresponding to the first inner threaded segment and the second inner threaded segment, so as to produce a bidirectional fastening effect.

[0009] Preferably, the top end of the seat rod has a seat bone for detachably assembling a seat pad.

[0010] Preferably, the valve group can produce a plunger action relative to the hollow chamber of the seat rod, and when the valve rod is reset, it is returned to the original position by a resilient member to close the valve hole.

[0011] Preferably, the bottom of the valve rod has a connecting section, the connecting section is fixed with a sleeve head, the sleeve head has a reverse U-shaped socket for buckling the roller, so that the valve rod synchronously moves with the displacement of the roller.

[0012] Preferably, the top end of the guide cylinder is provided with a convex part, the convex part is provided with at least one flow channel around the edge, and a pressure relief pad is sleeved outside the convex part, the surface of the pressure relief pad has at least one convex lip, so as to provide pressure release function during the action of the valve rod.

[0013] Preferably, the top surface of the convex part is provided with a buffer pad, the buffer pad bears the impact when the seat rod is pressed down, so as to avoid the wear of parts.

[0014] Preferably, the guide cylinder is formed with opposite flat surfaces on the outer periphery corresponding to the long guide hole, so as to improve the smoothness of the roller movement.

[0015] Preferably, a connecting pipe is arranged between the valve group and the driving module, and the valve rod can slide in the connecting pipe.

[0016] The beneficial effects of the present application are: through the specific implementation of the above technical means, the linear displacement linkage design of the guide cylinder, the rotating disc, the roller and the valve rod is adopted by the driving module, at the same time, the pushing mechanism formed by the cam guide edge of the rotating disc and the single roller can effectively simplify the structure, and can stably convert the rotary motion into linear displacement, so as to ensure that the stroke of the valve rod when opening and closing the valve piece is controllable, and the phenomenon of loosening and jamming is avoided, the practicability is effectively improved, and the added value and economic benefits are greatly improved.

[0017] The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a side view of the lifting seat pipe opening and closing valve structure of the present application.

[0019] Figure 2 is a perspective exploded view of the driving module in the lifting seat pipe opening and closing valve structure of the present application.

[0020] Figure 3 is a partial side view of the driving module in the lifting seat pipe opening and closing valve structure of the present application.

[0021] Figure 4 is a schematic view of the jacking action of the driving module opening the valve group in the lifting seat pipe opening and closing valve structure of the present application.

[0022] Figure 5is a schematic diagram of the lowering action of the drive module closing the valve group in the valve structure of the lifting seat pipe.

[0023] Figure 6 is a schematic diagram of the valve group before the opening action in the valve structure of the lifting seat pipe.

[0024] Figure 7 is a schematic diagram of the valve group after the opening action in the valve structure of the lifting seat pipe. DETAILED DESCRIPTION

[0025] The detailed structure of the valve structure of the lifting seat pipe is shown in Figure 1 and Figure 2 which comprises a seat pipe 10, a seat rod 20 capable of extending and retracting relative to the seat pipe 10, a valve group 30 arranged inside the seat rod 20, and a drive module 50 arranged at the bottom of the seat pipe 10 and capable of selectively opening and closing the valve group 30.

[0026] The seat pipe 10 has a sliding chamber 11 inside, as shown in Figure 1 , for the seat rod 20 to slide and extend and retract relative to the seat pipe 10. The seat pipe 10 and the bottom cover 15 together lock the drive module 50 at the bottom of the seat pipe 10. The inner walls of the opposite ends of the seat pipe 10 and the bottom cover 15 are respectively provided with a first inner threaded section 12 and a second inner threaded section 16. The first and second inner threaded sections (12, 16) are oppositely threaded, so that the drive module 50 can remain locked when it vibrates due to forward and reverse rotation.

[0027] The seat rod 20 has a seat bone 21 at the top end for detachably assembling a seat pad (not shown). The seat rod 20 has a hollow chamber 22 for the relative sliding of the valve group 30. The hollow chamber 22 is divided into a first chamber 23 and a second chamber 24 by the valve group 30. The first and second chambers 23 and 24 can change the relative volumes by the opening and closing action of the valve group 30, as shown in Figure 6 and Figure 7 .

[0028] The valve group 30 can produce a plunger action relative to the hollow chamber 22 of the seat rod 20, the valve group 30 has a valve hole 31 capable of connecting the first chamber 23 and the second chamber 24, and the valve group 30 has a valve piece 32 capable of selectively closing the valve hole 31, the valve group 30 has a connecting pipe 35 with the drive module 50, and the connecting pipe 35 has a valve rod 36 capable of being driven by the drive module 50, so that the valve rod 36 can selectively push the valve piece 32 to open and close the valve hole 31 of the valve group 30, and the valve group 30 is provided with a resilient member 38 for resetting after the valve rod 36 is actuated, the bottom of the valve rod 36 has a connecting section 361 for a sleeve 37, and the sleeve 37 has a downwardly open socket 371.

[0029] The drive module 50 at least includes a motor 51, a rotating disc 52 and a guide cylinder 55, wherein the motor 51 is fixedly arranged at the bottom of the bottom cover 15 and has an upwardly extending output shaft 511, the rotating disc 52 is fixedly arranged on the output shaft 511 in a connected manner and is arranged inside the guide cylinder 55, the rotating disc 52 has two cam guide edges 53 opposite around the axis at the periphery, a roller 54 is arranged across the two cam guide edges 53 of the rotating disc 52 and is perpendicular to the axis and capable of pushing the valve rod 36, so that the valve rod 36 can be limited on the roller 54 by the socket 371 of the sleeve 37, and the roller 54 can synchronously push the valve rod 36 when moving up and down, the guide cylinder 55 has an axial hole 550 for the valve rod 36 to slide through, and the guide cylinder 55 has a first external thread section 551 and a second external thread section 552 formed at the two ends of the outer diameter, wherein the first and second external thread sections (551, 552) are reversely threaded and correspond to the first and second internal thread sections (12, 16) respectively, so that the guide cylinder 55 can be locked between the seat pipe 10 and the bottom cover 15 to produce a bidirectional fastening effect, and the guide cylinder 55 is limited from rotating or loosening due to vibration, the guide cylinder 55 has two opposite flat surfaces 555 at the periphery, and a long guide hole 56 is formed on the two flat surfaces 555 for the two ends of the roller 54 on the rotating disc 52 to pass through and synchronously slide, so as to improve the smoothness of the movement of the roller 54, and when the rotating disc 52 is driven by the motor 51, the roller 54 can only move up and down along the long guide hole 56 because it is limited from rotating, the guide cylinder 55 has a convex part 57 at the top end for the valve rod 36 to pass through, and the convex part 57 has a plurality of flow channels 571 at the periphery, the convex part 57 has a relief pad 58 sleeved on the outer edge, the relief pad 58 has a plurality of convex lips 581 on the upper and lower surfaces, so that the relief pad 58 can cooperate with the flow channels 571 of the convex part 57 to produce a relief effect, the convex part 57 of the guide cylinder 55 has a buffer pad 59 at the top surface for the valve rod 36 to pass through, so as to bear the impact of the seat rod 20; thereby forming a lifting seat pipe on-off valve structure with simple structure and smooth and stable operation.

[0030] The present application, when implemented, as shown in Figure 1 , Figure 3 and Figure 4 , is operable when the drive module 50 starts to operate, the motor 51 inside it starts and drives the output shaft 511 to rotate, because the output shaft 511 is fixedly connected with the rotating disc 52, so that the rotating disc 52 rotates synchronously, and the two cam guide edges 53 formed on the periphery of the rotating disc 52 will produce periodic cam motion relative to the roller 54 during rotation, and the roller 54 is limited at both ends by the long guide hole 56 of the guide cylinder 55, so it cannot rotate with the rotating disc 52, but can only slide up and down along the long guide hole 56, so that the rotating motion of the rotating disc 52 is converted into the pushing force of the roller 54 in the up and down direction. When the roller 54 is lifted upward with the rotating disc 52, the sleeve head 37 connected thereto will synchronously drive the valve rod 36 to move upward (as shown in Figure 4 ). At this time, as shown in Figure 7 , the valve rod 36 pushes the valve piece 32 of the valve group 30, so that the valve hole 31 is opened, and the first chamber 23 and the second chamber 24 in the hollow chamber 22 of the seat rod 20 are communicated, so that hydraulic pressure or air pressure can flow between the first and second chambers (23, 24), achieving the switching state of the seat rod 20 extension and contraction, for example, the rider's own weight presses the seat rod 20 to contract, and the space of the first chamber 23 is compressed to generate a restoring force, so as to lower the seat cushion height. After releasing the downward pressing force of the seat rod 20, the pressure of the first chamber 23 can enter the second chamber 24 through the valve hole 31, so that the seat rod 20 rises to restore the seat cushion height.

[0031] Conversely, when the motor 51 of the drive module 50 reverses the rotating disc 52, as shown in Figure 5 and Figure 6 , the cam guide edge 53 of the rotating disc 52 can reversely make the roller 54 descend from the high point of the long guide hole 56 of the guide cylinder 55, so that the valve rod 36 moves downward under the restoring action of the elastic member 38. At this time, the valve piece 32 of the valve group 30 is restored to the closed position under the action of the second chamber 24, so that the valve hole 31 is sealed, and the passage between the first chamber 23 and the second chamber 24 in the seat rod 20 is blocked, so that the pressure state in the hollow chamber 22 of the seat rod 20 is fixed, ensuring that the seat rod 20 maintains the current extension and contraction position and is not affected by external force or vibration.

[0032] Furthermore, since the guide cylinder 55 is locked with the seat pipe 10 and the bottom cover 15 through the first and second outer threaded sections (551, 552) and the first and second inner threaded sections (12, 16) of reverse threaded structure, the guide cylinder 55 can remain stable and not loose under the conditions of the motor 51 rotating forward and reverse and the seat rod 20 vibrating. In addition, the convex portion 57 and the relief pad 58 can release high pressure during the operation of the valve rod 36, and the buffer pad 59 can withstand the impact of the seat rod 20, ensuring smooth operation of the overall structure.

[0033] As can be seen from the foregoing structure and operation, the present application can utilize the drive module 50 to adopt the linear displacement linkage design of the guide cylinder 55, the rotating disc 52, the roller 54 and the valve rod 36, thereby eliminating the inconvenience of additional complex parts required by traditional mechanisms. The cam guide edge 53 of the rotating disc 52 and the single roller 54 form a pushing mechanism that can stably convert rotary motion into linear displacement, ensuring that the stroke of the valve rod 36 opening and closing the valve member 32 is controllable and the response is accurate, and the phenomenon of loosening and jamming does not occur. In addition, the convex portion 57 at the top of the guide cylinder 55 and the convex lip 581 of the relief pad 58 can release pressure in real time when the internal cavity pressure is too high, avoiding the valve member 32 or the valve rod 36 from being damaged due to long-term overpressure. At the same time, the buffer pad 59 can effectively absorb the impact force generated during the extension and contraction of the seat rod 20, reducing the wear of the parts and prolonging the overall service life, thereby effectively improving the practicality.

Claims

1. A lift seat tube valve structure, comprising a seat tube, a seat post, a valve group and a drive module; characterized in that: The seat pipe has a sliding chamber; the seat rod is telescopic relative to the seat pipe in the sliding chamber, and has a hollow chamber; the valve group is arranged in the hollow chamber of the seat rod, so that the hollow chamber forms a first chamber and a second chamber, the valve group has a valve hole and a valve piece, the valve piece can selectively close or open the valve hole to control the fluid communication between the first chamber and the second chamber; the driving module is arranged at the bottom of the seat pipe and connected with the valve group, the driving module includes a motor, a rotating disc and a guide cylinder, the rotating disc can be actuated by the motor, and the peripheral edge of the rotating disc has two opposite cam guide edges for crossing a roller, the guide cylinder is fixedly arranged in the seat pipe, and two long guide holes are formed on the guide cylinder to limit the axial sliding of the roller, so that the roller can push a valve rod to selectively drive the valve piece to open and close the valve hole, thereby controlling the telescopic movement of the seat rod.

2. The lift seat tube valve structure of claim 1, wherein: A bottom cover is arranged at the bottom of the seat pipe, and the inner wall of the opposite end of the seat pipe is respectively provided with a first inner threaded section and a second inner threaded section in opposite directions, the outer edge of the guide cylinder is respectively provided with a first outer threaded section and a second outer threaded section corresponding to the first inner threaded section and the second inner threaded section, so as to produce a bidirectional fastening effect.

3. The lift seat tube valve structure of claim 1, wherein: The top end of the seat rod has a seat bone for detachably assembling a seat pad.

4. The lift seat tube valve structure of claim 1, wherein: The valve group can produce a piston action relative to the hollow chamber of the seat rod, and when the valve rod is reset, it is returned to the original position by an elastic piece to close the valve hole.

5. The lift seat tube valve structure of claim 1, wherein: The bottom of the valve rod has a connecting section, the connecting section is fixedly provided with a sleeve head, the sleeve head has a reverse U-shaped socket on it, which is used to hold the roller, so that the valve rod moves synchronously with the displacement of the roller.

6. The lift seat tube valve structure of claim 1, wherein: The top end of the guide cylinder is provided with a convex part, the peripheral edge of the convex part is provided with at least one flow channel, and a pressure relief pad is arranged on the outer edge of the convex part, the surface of the pressure relief pad has at least one convex lip, so as to provide pressure relief function during the action of the valve rod.

7. The lift seat tube valve structure of claim 6, wherein: The top surface of the convex part is provided with a buffer pad, which is used to bear the impact when the seat rod is pressed down, so as to avoid the wear of parts.

8. The lift seat tube valve structure of claim 1, wherein: The guide cylinder is formed with opposite flat surfaces on the outer peripheral edge corresponding to the long guide holes, so as to improve the smoothness of the movement of the roller.

9. The lift seat tube valve structure of claim 1, wherein: A connecting pipe is arranged between the valve group and the driving module, and the valve rod can slide in the connecting pipe.

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