Bicycle lifting seat tube with adjustable stroke

Abstract

The utility model discloses a bicycle lifting seat tube with an adjustable stroke. The bicycle lifting seat tube comprises an outer tube, the drive-by-wire assembly is mounted at the bottom end of the outer pipe; the shock-proof seat post comprises an inner tube, a seat cushion clamp arranged at the top end of the inner tube, and a shock absorber arranged between the inner tube and the drive-by-wire assembly; at least one limiting piece is arranged between the inner pipe and the outer pipe, so that the inner pipe can be limited to rotationally slide up and down in the outer pipe; the screw sleeve is sleeved on the inner pipe in a penetrating manner and is screwed on the outer pipe; the adjusting ring is sleeved in the inner pipe in a sliding manner, can be rotationally mounted at the top end of the outer pipe in situ, and is provided with a sliding block which is arranged in the guide sliding chute of the screw sleeve in a sliding manner, so that a rider can rotationally operate the adjusting ring to drive the screw sleeve to move up and down to be far away from or close to the adjusting ring, and therefore, the inner pipe can be pressed down or allowed to move up, and the rider can drive the inner pipe to move up and down. Therefore, the shock-absorbing seat post can be easily and quickly lifted and adjusted.

Description

Technical Field

[0001] This utility model relates to a chair seat structure with adjustable angle, and more particularly to a chair structure with multiple functions and uses, belonging to the technical field of chair structures. Background Technology

[0002] To enhance rider experience and performance, a dropper seatpost has been commercialized. This dropper seatpost can be freely raised and lowered according to the rider's individual needs or different riding environments to adjust the height of the saddle, especially in many competitions, such as downhill or cross-country races, so that riders no longer need to get off the bike to adjust the height.

[0003] There are two main types of lifting seat posts: mechanical and electronic. Mechanical lifting seat posts are mainly driven by cables and have stable performance. However, after a period of use, the parts are prone to rust due to external factors such as sweat or rain. Whether the cable is run inside or outside, there is also the issue of aesthetics if the cable is run outside.

[0004] Electronic seatposts offer more precise adjustments and avoid the aesthetic issues and rust problems associated with wiring. However, they have a more complex structure, are prone to malfunctions such as poor contact in electronic components, are more expensive, and require regular or irregular charging to ensure the internal valves function properly. Insufficient power can easily lead to malfunctions.

[0005] Early mechanical drop seatposts typically lacked shock absorption and could not be precisely adjusted. While some drop seatposts now feature shock absorption, they usually require a pull cable for adjustment. Some do not require a pull cable, but adjustments can only be made after removing other components, thus failing to achieve a simple, quick, and precise drop adjustment. Utility Model Content

[0006] The technical problem solved by this utility model is that it provides an adjustable travel bicycle dropper post, which solves the problem of easily and quickly raising and lowering the seat height without disassembling any other components while having shock absorption function.

[0007] The technical means adopted in this utility model are as follows.

[0008] This utility model provides an adjustable travel bicycle dropper seatpost, including an outer tube; a wired remote control assembly installed at the bottom end of the outer tube; a shock absorber seatpost including an inner tube, a seat clamp disposed at the top end of the inner tube, and a shock absorber installed between the inner tube and the wired remote control assembly; at least one limiting member is provided between the inner tube and the outer tube, so that the inner tube can be rotatably and slidingly up and down within the outer tube; a threaded sleeve passing through the inner tube and screwed onto the outer tube; an adjusting ring slidingly sleeved on the inner tube and rotatably mounted at the top end of the outer tube, and having a slider sliding in a guide groove of the threaded sleeve, so that the rider can rotate the adjusting ring to drive the threaded sleeve to move up and down, away from or closer to the adjusting ring. When it moves away from the adjusting ring, it can cause the inner tube to move downward, and when it moves closer to the adjusting ring, it allows the inner tube to move upward.

[0009] The technical effects of this utility model are as follows: The adjustable travel bicycle dropper post provided by this utility model allows the rider to easily move the shock absorber rod up and down by manually holding and rotating the adjustment ring, thereby adjusting the seat height installed at the top of the shock absorber rod. Therefore, the overall adjustment operation is quite simple and quick, especially since it can quickly adjust the seat height manually without disassembling any other components. Attached Figure Description

[0010] Figure 1 This is a three-dimensional view of the lifting seat tube of this utility model, showing the shock-absorbing seat rod at its maximum height.

[0011] Figure 2 yes Figure 1 A partial longitudinal sectional view.

[0012] Figure 3 yes Figure 1 A three-dimensional exploded view.

[0013] Figure 4 yes Figure 2 A magnified view of the adjustment ring.

[0014] Figure 5 yes Figure 2 A magnified view of the limiting component.

[0015] Figure 6 yes Figure 1 A three-dimensional view of the combination of the adjusting ring and the threaded sleeve.

[0016] Figure 7 yes Figure 1 A three-dimensional view showing the adjusting ring and the screw sleeve being far apart from each other.

[0017] Figure 8 yes Figure 2After the adjusting ring is rotated, the screw sleeve moves away from the adjusting ring until... Figure 7 A partial longitudinal sectional view of the state.

[0018] Symbol explanation:

[0019] 1: Lifting seat post

[0020] 10: External Management

[0021] 11: Internal thread segment; 12: Longitudinal groove

[0022] 13: Locating ring groove 14: Locating pin

[0023] 141: Positioning hole

[0024] 20: Wired control assembly

[0025] 30: Vibration damping seat post

[0026] 31: Inner tube; 311: Restricting component

[0027] 312: Groove; 32: Seat cushion clamp

[0028] 33: Shock absorber; 33a: Cylinder block

[0029] 33b: Piston rod

[0030] 40: Screw insert

[0031] 40a: Collar part; 40b: Threaded plate

[0032] 41: Guide groove 42: Retaining flange

[0033] 43: External thread segment

[0034] 50: Adjustment ring

[0035] 51: Operating ring part; 511: Annular groove

[0036] 52: Slider 53: Sealing ring

[0037] 531: Limiting ring groove; 532: Sealing gasket

[0038] 533: Shaft groove; 54: Sealing sleeve

[0039] 55: Bushing. Detailed Implementation

[0040] like Figures 1 to 5As shown, this utility model provides a preferred embodiment of an adjustable travel bicycle dropper seatpost. The dropper seatpost 1 is used to be installed and fixed on the frame of a bicycle. Commonly, it can be installed on the center tube of the frame and can also be used to install and fix a seat, so that the seat can rise or fall as the height of the dropper seatpost 1 is adjusted, thereby meeting the various riding needs of the rider.

[0041] The lifting seat tube 1 in this embodiment includes an outer tube 10, a line control assembly 20, a shock-absorbing seat rod 30, a threaded sleeve 40, and an adjusting ring 50; wherein:

[0042] The outer tube 10 can be installed on the frame, such as the middle tube, and its inner peripheral wall is provided with an internal thread section 11 and at least one longitudinal groove 12. In this embodiment, a plurality of longitudinal grooves 12 are provided, for example, six longitudinal grooves 12 are arranged at equal angles along the circumference.

[0043] The wired control component 20 is installed and fixed at the bottom end of the outer tube 10.

[0044] The shock absorber seat rod is 30mm, such as Figure 3 As shown, the device includes an inner tube 31, a seat clamp 32 mounted on the top of the inner tube 31, and a shock absorber 33 mounted inside the inner tube 31. The seat clamp 32 can hold and fix a seat, allowing the seat to rise or fall as the height of the inner tube 31 is adjusted. The shock absorber 33 has a cylinder 33a and a piston rod 33b telescopically mounted on the cylinder 33a; the top of the cylinder 33a is fixed to the top of the inner tube 31; the bottom of the piston rod 33b is fixed to the wired control assembly 20, and the shock absorber 33's damping function can be turned on or off, or its damping intensity, commonly known as its stiffness, can be adjusted, via the wired control assembly 20. The outer peripheral wall of the inner tube 31 is nested with at least one limiting member 311, which is also embedded and slidably disposed in the longitudinal groove 12 of the inner peripheral wall of the outer tube 10 from top to bottom, so that the inner tube 31 can be rotatably restricted to slide up and down along the axial direction within the outer tube 10.

[0045] The threaded sleeve 40 can be screwed into the inner thread section 11 of the outer tube 10 and sleeved on the outer peripheral wall of the inner tube 31. At least one guide groove 41 and a retaining flange 42 are formed thereon. By means of the elastic action of the medium inside the shock absorber 33, the limiting member 311 on the outer peripheral wall of the inner tube 31 can be forced to elastically abut against the retaining flange 42.

[0046] The adjusting ring 50 is slidably fitted onto the outer peripheral wall of the inner tube 31 and rotatably mounted on the top end of the outer tube 10. It has an operating ring portion 51 exposed outside the outer tube 10 and at least one slider 52, which can be nested and slidably placed within the guide groove 41 of the threaded sleeve 40. When the user rotates the adjusting ring 50, the slider 52 drives the threaded sleeve 40 to rotate, causing the threaded sleeve 40 to engage with the internal thread segment 11 of the inner peripheral wall of the outer tube 10. Simultaneously, the threaded sleeve 40 is restricted to moving away from or closer to the adjusting ring 50 along the axial direction. Figure 6 , Figure 7 As shown, this causes the inner tube 31 to move downwards, thereby lowering the height of the shock absorber rod 30, as... Figure 7 , Figure 8 As shown, the inner tube 31 may be allowed to move upwards, thereby adjusting the height of the shock absorber rod 30, such as... Figure 2 , Figure 6 As shown.

[0047] In this embodiment, as Figure 3 , Figure 5 As shown, the inner circumferential wall of the outer tube 10 is provided with a plurality of longitudinal grooves 12 at equal angles. For example, six longitudinal grooves 12 are provided at equal angles along the circumferential direction and pass through the internal thread section 11. The outer circumferential wall of the inner tube 31 is provided with three recessed grooves 312 at equal angles, which can respectively embed and position one of the limiting members 311. The limiting members 312 can be nested and slidably disposed in any three opposite longitudinal grooves 12 from top to bottom. In other words, the limiting members 312 can move along the upper and lower axial directions of the longitudinal grooves 12.

[0048] Preferably, the limiting member 312 is rod-shaped, and its top end maintains an elastic abutment against the retaining flange 42 at the bottom end of the threaded sleeve 40.

[0049] In this embodiment, as Figure 3 , Figure 4 As shown, the threaded sleeve 40 has a collar portion 40a and two threaded plates 40b extending symmetrically from the top edge of the collar portion 40a. The bottom edge of the collar portion 40a can define the retaining flange 42. The threaded plates 40b define two guide grooves 41 between each other, and each has an external thread section 43 formed on its outer peripheral wall, which can be screwed into the internal thread section 11 of the outer tube 10. The adjusting ring 50 has a sealing ring portion 53, which can be sleeved on the outer peripheral wall of the inner tube 31 and can be slidably sleeved on the inner peripheral wall of the top end of the outer tube 10. The top end of the sealing ring portion 53 extends integrally from the operating ring portion 51, and the bottom end of the sealing ring portion 53 extends integrally from two sliders 52, which can be nested and slidably placed in the guide grooves 41 respectively.

[0050] It is easily understood that when the adjusting ring 50 is rotated, the slider 52, which extends from its bottom end and slides into the guide groove 41, drives the threaded sleeve 40 to rotate. Since the threaded sleeve 40 is threaded into the inner thread section 11 of the outer tube 10, and the outer tube 10 is fixed to the bicycle's center tube and cannot rotate, the threaded sleeve 40 is forced to move axially within the outer tube 10 during rotation, moving away from or closer to the adjusting ring 50. Figure 6 , Figure 7 As shown, since the inner tube 31 and the outer tube 10 are restricted by the circumferential locking of the limiting member 311, they can only move relative to each other axially, but cannot rotate relative to each other. This means that when the threaded sleeve 40 moves axially downward, the limiting member 311 on the outer circumferential wall of the inner tube 31 can be actuated by the bottom flange 42, thereby pushing the inner tube 31 downward. In this way, the height of the shock absorber rod 30 and its upper seat pad can be adjusted downward. Figure 8 As shown; furthermore, when the threaded sleeve 40 moves upward axially, the top end of the limiting member 311 on the outer peripheral wall of the inner tube 31 can always elastically abut against the retaining flange 42 at the bottom end of the threaded sleeve 40, allowing the inner tube 31 to move upward synchronously using the elastic restoring force of the shock absorber 33. In this way, the height of the shock absorber rod 30 and its upper seat pad can be adjusted upward, such as... Figure 2 As shown.

[0051] In this embodiment, as Figure 3 , Figure 4 As shown, the outer tube 10 has a positioning ring groove 13 near its top end, which allows the sealing ring portion 53 of the adjusting ring 50 to be nested and positioned within it. At least one positioning pin 14 is provided on the inner circumferential wall of the positioning ring groove 13, entering the groove. The outer circumferential wall of the sealing ring portion 53 of the adjusting ring 50 has a limiting ring groove 531, which allows the positioning pin 14 to be inserted and positioned within it, restricting the adjusting ring 50 to rotate only in place and preventing it from axially disengaging from the outer tube 10. It is understood that the positioning pin 14 can be made of a threaded component, such as a headless bolt. In this embodiment, the outer tube 10 has six positioning holes 141 arranged at equal angles on its outer circumferential wall relative to the positioning ring groove 13, each capable of being threaded and positioned with a headless bolt to form the positioning pin 14. The longitudinal groove 12 extends downward from the inner circumferential wall adjacent to the bottom wall of the positioning ring groove 13 of the outer tube 10.

[0052] Preferably, a sealing washer 532 is nested within the outer peripheral wall of the sealing ring portion 53 of the adjusting ring 50, which is sealed within the inner peripheral wall of the positioning ring groove 13 of the outer tube 10. This achieves a good sealing and waterproofing effect, preventing external impurities or water from entering the lifting seat tube 1 through the space between the adjusting ring 50 and the outer tube 10, thus affecting its structure and function.

[0053] Preferably, the inner peripheral wall of the operating ring portion 51 of the adjusting ring 50 is further formed with an annular groove 511 for locking and fixing a sealing sleeve 54, so that it can be sealed and nested within the outer peripheral wall of the inner tube 31. This achieves a good sealing and waterproof effect, preventing external impurities or water from entering the lifting seat tube 1 through the space between the adjusting ring 50 and the inner tube 31, thus affecting its structure and function.

[0054] Preferably, the inner peripheral wall of the sealing ring portion 53 of the adjusting ring 50 has a shaft groove 533, which allows a bushing 55 to be nested and positioned, so that it can be pivotally attached to the outer peripheral wall of the inner tube 31. The top end of the bushing is stopped and limited by the sealing sleeve 54 to prevent it from axially disengaging. This bushing 55 design ensures that the adjusting ring 50 can be rotated stably and smoothly.

[0055] It should be noted that the shock absorber 33 can be any common hydraulic cylinder or pneumatic cylinder, and therefore its internal medium can be common hydraulic oil or gas.

[0056] With the above structure, the rider can easily adjust the height of the shock absorber seat post 30 by gripping and rotating the operating ring 51 above the exposed adjustment ring 50 at the top of the outer tube 10. In this way, the height of the seat pad installed at the top of the shock absorber seat post 30 can be adjusted. Therefore, the overall adjustment operation is quite simple and quick. The seat pad height can be quickly adjusted manually without disassembling any other components. In particular, it can perform precise and stable fine-tuning of height adjustment. Therefore, it can effectively improve many of the shortcomings of conventional mechanical drop seat posts.

Claims

1. An adjustable travel bicycle lift seat tube, characterized by, include: An outer tube is provided for mounting on a bicycle frame, and its inner peripheral wall is provided with an internal thread section and at least one longitudinal groove. A control unit is installed and fixed at the bottom of the outer tube; A shock absorber includes an inner tube, a seat pad clamp mounted on the top of the inner tube, and a shock absorber mounted in the inner tube; the shock absorber has a cylinder and a piston rod telescopically mounted on the cylinder, the top of the cylinder being fixed to the top of the inner tube, and the bottom of the piston rod being fixed to the wire control assembly; the outer peripheral wall of the inner tube is nested with at least one limiting member, and is simultaneously embedded and slidably disposed in a longitudinal groove on the inner peripheral wall of the outer tube from top to bottom, so that the inner tube can be rotatably restricted to slide axially up and down within the outer tube; A threaded sleeve is provided for screwing into the inner thread section of the outer tube and passing through the outer peripheral wall of the inner tube. At least one guide groove and a retaining flange are formed thereon. By means of the elastic action of the medium inside the shock absorber, the limiting member on the outer peripheral wall of the inner tube can be forced to maintain elasticity against the retaining flange. An adjusting ring is slidably fitted onto the outer circumferential wall of the inner tube and rotatably mounted on the top end of the outer tube. It has an operating ring portion exposed outside the outer tube and at least one slider that can be nested and slidably placed in the guide groove of the threaded sleeve. When the user rotates the adjusting ring, the threaded sleeve can be rotated by the slider, so that the threaded sleeve and the internal thread section of the inner circumferential wall of the outer tube can be screwed together. At the same time, the threaded sleeve is restricted to moving away from or closer to the adjusting ring along the axial direction, thereby causing the inner tube to move downward to adjust the height of the shock absorber rod, or allowing the inner tube to move upward to adjust the height of the shock absorber rod.

2. The adjustable travel bicycle saddle post of claim 1, wherein, The inner circumferential wall of the outer tube is provided with three longitudinal sliding grooves at equal angles, which pass through the internal thread section; the outer circumferential wall of the inner tube is provided with three recessed grooves at equal angles, which can respectively embed and position one of the limiting members, and the limiting members can be nested and slidably arranged in the longitudinal sliding grooves from top to bottom.

3. The adjustable travel bicycle saddle post of claim 1 wherein, The limiting element is rod-shaped.

4. The adjustable travel bicycle saddle post of claim 1 wherein, The sleeve has a collar portion and two threaded plates extending symmetrically from the top edge of the collar portion; the bottom edge of the collar portion can define the retaining flange; the threaded plates define two guide grooves between each other, and each has an external thread section formed on its outer peripheral wall, which can be screwed into the internal thread section of the outer tube; the adjusting ring has a sealing ring portion that can be sleeved on the outer peripheral wall of the inner tube and can be slidably sleeved on the inner peripheral wall of the top end of the outer tube, and the top end of the sealing ring portion integrally extends into the operating ring portion, and the bottom end of the sealing ring portion integrally extends into two sliders that can be nested and slidably placed in the guide grooves respectively.

5. The adjustable travel bicycle saddle post of claim 4, wherein, The outer tube has a positioning ring groove near its top end, in which the sealing ring portion of the adjusting ring can be nested and positioned. At least one positioning pin is provided on the inner circumferential wall of the positioning ring groove and enters into the positioning ring groove. The outer circumferential wall of the sealing ring portion of the adjusting ring has a limiting ring groove, in which the positioning pin can be inserted and positioned, so that the adjusting ring is restricted to rotating only in place and cannot be axially disengaged from the outer tube.

6. The adjustable travel bicycle saddle post of claim 5, wherein, The outer wall of the sealing ring part of the adjusting ring is nested with a sealing washer, which is nestingly sealed in the inner wall of the locating ring groove of the outer tube.

7. The adjustable travel bicycle saddle of claim 6, wherein, The inner wall of the operating ring part of the adjusting ring is formed with a ring-shaped clamping groove, which is used for clamping and fixing a sealing sleeve, so that it can be nestingly sealed in the outer wall of the inner tube.

8. The adjustable travel bicycle saddle of claim 7, wherein, The inner wall of the sealing ring part of the adjusting ring is formed with an axle groove, which is used for nesting and positioning an axle sleeve, so that it can be pivotally connected to the outer wall of the inner tube, and the top end of the axle sleeve is limited by the sealing sleeve.

9. The adjustable travel bicycle saddle of claim 1, wherein, The shock absorber is a hydraulic cylinder or a pneumatic cylinder, and the internal medium is liquid or gas.

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