A wishbone-type shock absorber tube

Abstract

This utility model discloses a linkage-type shock-absorbing seat post, including a shock-absorbing seat post, a linkage assembly, and a seat post base. A seat post connector is fixedly installed on the top of the shock-absorbing seat post. The linkage assembly includes two lower and upper linkages arranged in a straight line. The tops of the lower and upper linkages are respectively connected to two base connecting shafts. The inner wall of the top of the seat post connector is provided with a seat post connecting shaft that is rotatably connected to the bottom second linkage shaft and the bottom first linkage shaft, respectively. In this utility model, the upper and lower linkages form a linkage assembly. When the bicycle travels on an uneven road surface, the seat cushion, through the adjusting shaft, causes the seat post base to press down. At this time, the linkage assembly is pressed down, causing the lower linkage to move the seat post roller downwards. Subsequently, the seat post roller, through the axle plug, moves the seat post shaft downwards, compressing the first spring. The first spring then contracts and provides cushioning, thus achieving the shock absorption and cushioning effect.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a linkage-type shock-absorbing seat post. Background Technology

[0002] Bicycles are a widely used mode of transportation, powered by human pedaling. They require no electricity or gasoline, making them highly environmentally friendly and ideal for general transportation or recreational activities. When riding on uneven surfaces, especially rough or bumpy roads, or hiking on rocky trails or terrain with elevation changes, the bicycle will vibrate due to the instability of the ground. To address this, most bicycles are equipped with shock absorbers to absorb these vibrations and provide a more comfortable ride.

[0003] However, the vibrations generated when a bicycle is in motion do not all result in axial force; some longitudinal force is inevitable. This force can cause the inner tube to press against the outer tube, and the frictional resistance between the inner and outer tubes results in poor cushioning and shock absorption. In addition, prolonged use will cause wear on the tube walls, increasing the gap between the inner and outer tubes. This prevents the outer tube from effectively restricting the axial movement of the inner tube, causing the inner tube to sway back and forth within the outer tube. Consequently, without proper cushioning and shock absorption, this can lead to saddle wobbling. Further improvements are needed.

[0004] Therefore, there is an urgent need for a linkage-type shock absorber seat tube. This linkage-type shock absorber seat tube should have the function of buffering and damping the vibration generated when the bicycle is riding, as well as buffering some of the front and rear force components, and also have the characteristic of effectively reducing the friction on the inner and outer walls of the shock absorber seat tube. Utility Model Content

[0005] To meet the above requirements, this utility model provides a linkage-type shock absorber seat tube to solve the problems mentioned in the background art.

[0006] To solve the above technical problems, this utility model achieves the following technical solution: a linkage-type shock absorber base tube, including a shock absorber base tube, a linkage assembly, and a base tube base. A base tube connector is fixedly installed on the top of the shock absorber base tube. A spring fixing seat is provided at the bottom end of the inner cavity of the shock absorber base tube. A base tube shaft is slidably provided on the top of the inner cavity of the shock absorber base tube. A first spring is provided vertically and telescopically between the base tube shaft and the spring fixing seat. A base connecting shaft is provided through the top and bottom of the rear end of the base tube base. An adjusting seat is rotatably connected inside the base tube base. Both ends of the adjusting seat extend to the outside of the base tube base. Locking blocks are provided at both ends of the adjusting seat outside the base tube base. An auxiliary buffer assembly capable of damping the adjusting seat is provided inside the locking block.

[0007] The connecting rod assembly includes two lower connecting rods and an upper connecting rod arranged in a straight line. The tops of the lower connecting rods and the upper connecting rods are respectively connected to two base connecting shafts. A protrusion is provided on the front side of the lower connecting rod, and a groove is formed on the front side wall of the protrusion. A seat tube roller is rotatably connected to the inner wall of the groove. A connecting seat is provided on the bottom of the lower connecting rod, and an urethane rubber wheel that contacts the shock-absorbing seat tube is rotatably connected to the inner wall of the connecting seat. An urethane rubber column connected to the lower connecting rod is fixedly installed on the front side wall of the upper connecting rod. A seat tube connecting shaft is provided on the inner wall of the top of the seat tube joint, which is rotatably connected to the bottom of the upper connecting rod and the bottom of the lower connecting rod respectively.

[0008] Furthermore, a second connecting rod shaft is provided at both ends of the upper connecting rod. The upper connecting rod is rotatably connected to the top base connecting shaft through the top second connecting rod shaft. A second fixing screw is provided at the top and bottom of the upper connecting rod to be fixedly connected to the second connecting rod shaft. A first bushing is provided at the outer end of each of the two second connecting rod shafts. The bottom second connecting rod shaft is rotatably connected to the top seat tube connecting shaft.

[0009] Furthermore, both ends of the lower connecting rod are provided with a first connecting rod shaft. The lower connecting rod is rotatably connected to the bottom base connecting shaft through the top first connecting rod shaft. The top and bottom of the lower connecting rod are provided with a first fixing screw that is fixedly connected to the first connecting rod shaft. The outer ends of the two first connecting rod shafts are provided with a second bushing. The bottom seat tube connecting shaft is rotatably connected to the bottom first connecting rod shaft.

[0010] Furthermore, the top and bottom of the front end of the seat tube base are both provided with tension seats, and an adjustment groove is provided on the front side of the seat tube base between the two tension seats. The internal threads of the two tension seats are connected with tension bolts.

[0011] Furthermore, the auxiliary buffer assembly includes an adjustment shaft disposed inside the adjustment seat, both ends of the adjustment shaft extending to the outside of the locking block, and both ends of the adjustment shaft being connected to the locking block, and a second spring being disposed on the surface of the adjustment shaft.

[0012] Furthermore, a front arc-shaped plate protrudes from one side of the top of the locking block, and a rear arc-shaped plate protrudes from the other side of the top of the locking block. A stress-dispersing groove is formed between the front arc-shaped plate and the rear arc-shaped plate.

[0013] Furthermore, the seat tube roller is provided with a roller connecting shaft that is rotatably connected to the inner wall of the groove, and a fixing pin that is connected to the roller connecting shaft is fixedly connected to the side wall of the seat tube roller away from the lower connecting rod.

[0014] Furthermore, a shaft plug is provided at the top of the seat tube shaft, and the seat tube shaft contacts the seat tube roller through the shaft plug. The vertical cross-section of the shaft plug is convex.

[0015] Furthermore, the spring fixing seat is connected to the bottom of the inner cavity of the shock absorber tube via threads.

[0016] Furthermore, a shaft sealing ring is provided on the surface of the seat tube shaft and at the bottom of the urethane rubber wheel, and the outer ring wall of the shaft sealing ring is connected to the inner wall of the shock-absorbing seat tube.

[0017] The beneficial technical effects of this utility model are:

[0018] 1. This linkage-type shock-absorbing seatpost consists of an upper linkage and a lower linkage assembly. When the bicycle travels on an uneven road surface, the saddle presses down on the seatpost base via the adjusting shaft. At this time, the linkage assembly is pressed down, causing the lower linkage to move the seatpost roller downwards. Subsequently, the seatpost roller moves the seatpost shaft downwards via the axle plug, compressing the first spring. The first spring then provides cushioning while contracting, thus achieving the shock absorption and cushioning effect.

[0019] 2. This linkage-type shock-absorbing seat post, by setting an auxiliary buffer component, when the seat cushion moves forward or backward, the seat cushion can rotate the adjustment shaft through the locking block. At this time, the second spring on the surface of the adjustment shaft stores force and increases resistance, so that the locking block can better contact the seat cushion and buffer, reducing the amplitude of front and rear vibration. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the upper and lower connecting rods of this utility model;

[0022] Figure 3 This is an exploded view of the structure of this utility model;

[0023] Figure 4 This is a front view schematic diagram of the structure of the lower connecting rod and the upper connecting rod of this utility model;

[0024] Figure 5 This is a front view sectional view of the lower connecting rod and the upper connecting rod of this utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of the structure of the seat tube base and the adjusting shaft of this utility model;

[0026] Figure 7 This is a three-dimensional structural schematic diagram of the locking block and adjusting shaft of this utility model;

[0027] Figure 8 This is a front view schematic diagram of the structure of the seat tube base and the base connecting shaft of this utility model;

[0028] Figure 9 This is a front view schematic diagram of the structure of this practical locking block.

[0029] The numbers and letters in the diagram represent the names of the corresponding components:

[0030] 1. Vibration damper seat tube; 11. Seat tube shaft; 12. First spring; 13. Spring fixing seat; 14. Seat tube connector; 144. Seat tube connecting shaft; 15. Shaft sealing ring; 16. Shaft plug; 17. Polyurethane rubber wheel; 2. Lower connecting rod; 21. First connecting rod shaft; 211. First fixing screw; 22. Protrusion; 23. Groove; 211. First fixing screw; 3. Locking block; 31. Adjusting shaft; 32. Second spring; 33. Front arc plate; 34. Stress dispersion groove; 35. Rear arc plate; 4. Adjusting seat; 5. Seat tube roller; 51. Roller connecting shaft; 6. Seat tube base; 61. Tightening bolt; 62. Base connecting shaft; 63. Tightening seat; 7. Upper connecting rod; 71. Second connecting rod shaft; 711. Second fixing screw; 72. Polyurethane rubber column; 8. Limiting seat. Detailed Implementation

[0031] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] See appendix Figures 1-9 As shown, a linkage-type shock absorber seat tube in Embodiment 1 includes a shock absorber seat tube 1, a linkage assembly, and a seat tube base 6. A seat tube connector 14 is fixedly installed on the top of the shock absorber seat tube 1. A spring fixing seat 13 is provided at the bottom end of the inner cavity of the shock absorber seat tube 1. A seat tube shaft 11 is slidably provided on the top of the inner cavity of the shock absorber seat tube 1. A first spring 12 is vertically and telescopically provided between the seat tube shaft 11 and the spring fixing seat 13.

[0033] See appendix Figures 2-5 As shown, the rod assembly includes two lower connecting rods 2 and upper connecting rods 7 arranged in a straight line. Compared with the traditional H-shaped connecting rod, the straight-line design of the lower connecting rod 2 and upper connecting rod 7 has the advantages of simple manufacturing process (such as cutting and grinding), suitable for mass production, and much lower cost than the H-shaped connecting rod. In addition, when used in a compact space such as bicycle seat shock absorption, the straight-line connecting rod does not affect the simplicity of the overall structure.

[0034] The seatpost axle 11, the first spring 12, and the spring retainer 13 form a shock-absorbing assembly. When the seatpost axle 11 moves downward, it compresses the first spring 12, causing the first spring 12 to contract and store force, thus increasing the resistance to the downward movement of the seatpost axle 11 and cushioning the bicycle saddle. When the saddle is not under pressure, the first spring 12 unfolds and releases its force, pushing the seatpost axle 11 upward to reset, ensuring that the saddle can cushion and absorb shock every time it is pressed down.

[0035] The top and bottom of the rear end of the seat tube base 6 are both provided with base connecting shafts 62. An adjusting seat 4 is rotatably connected inside the seat tube base 6. Both ends of the adjusting seat 4 extend to the outside of the seat tube base 6. Locking blocks 3 are provided at both ends of the adjusting seat 4 outside the seat tube base 6. An auxiliary buffer assembly capable of damping the adjusting seat 4 is provided inside the locking block 3. The auxiliary buffer assembly includes an adjusting shaft 31 provided inside the adjusting seat 4. Both ends of the adjusting shaft 31 extend to the outside of the locking block 3, and both ends of the adjusting shaft 31 are connected to the locking block 3. A second spring 32 is provided on the surface of the adjusting shaft 31.

[0036] When the seat base 6 is fitted onto the surface of the adjusting seat 4, the locking block 3 is then fixed on both sides of the seat base 6, connecting the seat base 6 to the seat. When the seat moves forward or backward, the seat drives the adjusting shaft 31 to rotate forward or backward through the locking block 3, so that the adjusting shaft 31 is buffered by the second spring 32, reducing the vibration caused by the forward and backward movement of the seat.

[0037] The top and bottom of the front end of the seat tube base 6 are both provided with tension seats 63. An adjustment groove is provided on the front side of the seat tube base 6 between the two tension seats 63. The internal threads of the two tension seats 63 are connected to tension bolts 61. By providing the adjustment groove, the two tension seats 63 at the front end of the seat tube base 6 can be unfolded and fitted onto the adjustment seat 4. Then, the two tension seats 63 are tightened by the tension bolts 61 to adjust the tightness of the seat tube base 6.

[0038] The tops of the lower connecting rod 2 and the upper connecting rod 7 are respectively connected to the two base connecting shafts 62. The front side of the lower connecting rod 2 has a protruding protrusion 22, and the front side wall of the protrusion 22 has a groove 23. The inner wall of the groove 23 is rotatably connected to the seat tube roller 5. The bottom of the lower connecting rod 2 has a protruding limit seat 8, and the inner wall of the limit seat 8 is rotatably connected to the urethane rubber wheel 17 that contacts the shock absorber seat tube 1. One side of the urethane rubber wheel 17 has an arc groove that matches the curvature of the surface of the shock absorber seat tube 1. The urethane rubber wheel 17 contacts the shock absorber seat tube 1 through the arc groove.

[0039] The limiting seat 8 is designed so that when the seat tube shaft 11 pushes the lower connecting rod 2 upward to rotate, the limiting seat 8 can be fixed by the urethane rubber wheel 17 against the surface of the shock-absorbing seat tube 1 to prevent the lower connecting rod 2 from rotating too much, causing the seat tube roller 5 to disengage from the surface of the shaft plug 16, thus preventing the lower connecting rod 2 from continuing to work.

[0040] The inner wall of the limiting seat 8 is provided with a rotating shaft connected to the urethane wheel 17, and a gear is provided at one end of the rotating shaft. By providing the gear, the resistance to the rotation of the urethane wheel 17 can be increased, and the urethane wheel 17 can be prevented from being displaced due to shaking. This would prevent the arc shape on one side of the urethane wheel 17 from tightly fitting the surface of the shock absorber seat tube 1 when the seat tube base 6 is reset, thus preventing the limiting seat 8 from hitting the inner wall of the shock absorber seat tube 1.

[0041] By using the rubber material of the urethane wheel 17, the buffering force between the urethane wheel 17 and the surface of the shock absorber tube 1 can be further increased, effectively preventing direct collision between the limit seat 8 and the shock absorber tube 1, so that the limit seat 8 can be guaranteed to have a service life without affecting stress dispersion.

[0042] The upper connecting rod 7 has a fixedly installed urethane column 72 that is connected to the lower connecting rod 2 on the front side wall. The inner wall of the top of the seat tube joint 14 is provided with a seat tube connecting shaft 144 that is rotatably connected to the bottom of the upper connecting rod 7 and the bottom of the lower connecting rod 2 respectively.

[0043] The upper connecting rod 7 and the lower connecting rod 2 form a connecting rod assembly. When the bicycle travels on an uneven road surface, the bicycle seat presses down, causing the locking block 3 to move downward. Then, the locking block 3 drives the seat post base 6 to press down via the adjusting shaft 31. At this time, the connecting rod assembly is pressed down, causing the lower connecting rod 2 to drive the seat post roller 5 to move downward. Then, the seat post roller 5 drives the seat post shaft 11 to move downward via the shaft plug 16, compressing the first spring 12. Then, the first spring 12 provides cushioning while contracting, thus achieving the effect of shock absorption and cushioning.

[0044] Furthermore, both ends of the upper connecting rod 7 are provided with a second connecting rod shaft 71. The upper connecting rod 7 is rotatably connected to the top base connecting shaft 62 through the top second connecting rod shaft 71. The top and bottom of the upper connecting rod 7 are provided with a second fixing screw 711 that is fixedly connected to the second connecting rod shaft 71. The outer ends of the two second connecting rod shafts 71 are provided with a first bushing. The bottom second connecting rod shaft 71 is rotatably connected to the top seat tube connecting shaft 144.

[0045] By setting the first bushing, when the second connecting rod shaft 71 is rotatably connected to the top base connecting shaft 62 and the top seat tube connecting shaft 144 respectively through the first bushing, direct contact between the second connecting rod shaft 71 and the top base connecting shaft 62 and the top seat tube connecting shaft 144 is avoided, thus reducing friction and making the seat tube base 6 and the upper connecting rod 7 more stable when moving.

[0046] Furthermore, both ends of the lower connecting rod 2 are provided with a first connecting rod shaft 21. The lower connecting rod 2 is rotatably connected to the bottom base connecting shaft 62 through the top first connecting rod shaft 21, and the lower connecting rod 2 is rotatably connected to the bottom seat tube connecting shaft 144 through the bottom first connecting rod shaft 21. The top and bottom of the lower connecting rod 2 are provided with a first fixing screw 211 that is fixedly connected to the first connecting rod shaft 21. The outer ends of the two first connecting rod shafts 21 are provided with a second bushing. The bottom seat tube connecting shaft 144 is rotatably connected to the bottom first connecting rod shaft 21.

[0047] By setting a second bushing, when the lower connecting rod 2 is rotatably connected to the bottom base connecting shaft 62 and the bottom seat tube connecting shaft 144 respectively through the second bushing, direct contact between the two first connecting rod shafts 21, the bottom seat tube connecting shaft 144 and the bottom base connecting shaft 62 is avoided, further reducing friction.

[0048] Furthermore, a front arc plate 33 protrudes from one side of the top of the locking block 3, and a rear arc plate 35 protrudes from the other side of the top of the locking block 3. A stress dispersion groove 34 is formed between the front arc plate 33 and the rear arc plate 35.

[0049] By setting the stress dispersion groove 34, the continuous curved transition replaces the sharp corner, which can distribute the stress more evenly to a larger area and significantly reduce the stress concentration factor.

[0050] Furthermore, the seat tube roller 5 is provided with a roller connecting shaft 51 that is rotatably connected to the inner wall of the groove 23, and a fixing pin that is connected to the roller connecting shaft 51 is fixedly connected to the side wall of the seat tube roller 5 away from the lower connecting rod 2.

[0051] By setting a fixing pin, the seat tube roller 5 can be stably fixed on the roller connecting shaft 51, preventing the seat tube roller 5 from moving on the surface of the roller connecting shaft 51 due to vibration. This would cause the force point of the shaft plug 16 to shift when the seat tube roller 5 is pressed down, resulting in greater wear on the seat tube shaft 11.

[0052] Furthermore, a shaft plug 16 is provided at the top of the seat tube shaft 11, and the seat tube shaft 11 contacts the seat tube roller 5 through the shaft plug 16. The vertical section of the shaft plug 16 is convex.

[0053] By setting the shaft plug 16, the seat tube roller 5 is in contact with the upper surface of the shaft plug 16 when it moves downward, so that the shaft plug 16 can distribute the stress and avoid the seat tube shaft 11 being directly subjected to force, which would cause the seat tube shaft 11 to have greater friction with the inner wall of the shock-absorbing seat tube 1. At the same time, the shaft plug 16 can be connected to the top of the seat tube shaft 11 by threads, which can prevent it from falling off due to vibration.

[0054] Furthermore, the spring fixing seat 13 is connected to the bottom of the inner cavity of the shock absorber seat tube 1 by threads.

[0055] The spring retainer 13 is detachable via a threaded connection, allowing the first spring 12 to be replaced after prolonged use.

[0056] Furthermore, a shaft sealing ring 15 is provided on the surface of the seat tube shaft 11 and at the bottom of the rubber wheel 17, and the outer ring wall of the shaft sealing ring 15 is connected to the inner wall of the shock-absorbing seat tube 1.

[0057] By setting the shaft seal ring 15, when the seat tube shaft 11 moves vertically on the inner wall of the shock absorber seat tube 1, the shaft seal ring 15 can increase the resistance, provide some buffering force, and prevent the seat tube shaft 11 from directly contacting the shock absorber seat tube 1, reducing damage caused by friction. In addition, when the seat tube shaft 11 is subjected to lateral vibration stress, the shaft seal ring 15 can also protect it, preventing the seat tube shaft 11 from colliding with the inner wall of the shock absorber seat tube 1, thus improving stability.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A linkage-type vibration damping seat tube, characterized in that: The device includes a shock absorber seat tube (1), a connecting rod assembly, and a seat tube base (6). A seat tube connector (14) is fixedly installed on the top of the shock absorber seat tube (1). A spring fixing seat (13) is provided at the bottom end of the inner cavity of the shock absorber seat tube (1). A seat tube shaft (11) is slidably provided on the top of the inner cavity of the shock absorber seat tube (1). A first spring (12) is provided vertically and telescopically between the seat tube shaft (11) and the spring fixing seat (13). The top and bottom of the rear end of the seat tube base (6) are both provided with a base connecting shaft (62). An adjusting seat (4) is rotatably connected inside the seat tube base (6). Both ends of the adjusting seat (4) extend to the outside of the seat tube base (6). Locking blocks (3) are provided at both ends of the adjusting seat (4) located outside the seat tube base (6). An auxiliary buffer component capable of shock absorption of the adjusting seat (4) is provided inside the locking block (3). The connecting rod assembly includes two lower connecting rods (2) and upper connecting rods (7) arranged in a straight line. The tops of the lower connecting rods (2) and the upper connecting rods (7) are respectively connected to the two base connecting shafts (62). A protrusion (22) is provided on the front side of the lower connecting rod (2). A groove (23) is provided on the front side wall of the protrusion (22). A seat tube roller (5) is rotatably connected to the inner wall of the groove (23). A connecting seat (8) is provided on the bottom of the lower connecting rod (2). An urethane rubber wheel (17) that contacts the shock-absorbing seat tube (1) is rotatably connected to the inner wall of the connecting seat (8). The upper connecting rod (7) has a fixedly installed urethane column (72) connected to the lower connecting rod (2) on its front side wall, and the inner wall of the top of the seat tube joint (14) is provided with a seat tube connecting shaft (144) that is rotatably connected to the bottom of the upper connecting rod (7) and the bottom of the lower connecting rod (2).

2. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The upper connecting rod (7) is provided with a second connecting rod shaft (71) at both ends. The upper connecting rod (7) is rotatably connected to the top base connecting shaft (62) through the top second connecting rod shaft (71). The top and bottom of the upper connecting rod (7) are provided with a second fixing screw (711) that is fixedly connected to the second connecting rod shaft (71). The outer ends of the two second connecting rod shafts (71) are provided with a first bushing. The bottom second connecting rod shaft (71) is rotatably connected to the top seat tube connecting shaft (144).

3. The linkage-type vibration damping seat tube according to claim 1, characterized in that, Both ends of the lower connecting rod (2) are provided with a first connecting rod shaft (21). The lower connecting rod (2) is rotatably connected to the base connecting shaft (62) at the bottom through the first connecting rod shaft (21) at the top. The top and bottom of the lower connecting rod (2) are provided with a first fixing screw (211) that is fixedly connected to the first connecting rod shaft (21). The outer ends of the two first connecting rod shafts (21) are provided with a second bushing. The bottom seat tube connecting shaft (144) is rotatably connected to the bottom first connecting rod shaft (21).

4. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The top and bottom of the front end of the seat tube base (6) are provided with tension seats (63). An adjustment groove is provided on the front side of the seat tube base (6) and between the two tension seats (63). The two tension seats (63) are internally threaded with tension bolts (61).

5. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The auxiliary buffer assembly includes an adjustment shaft (31) disposed inside the adjustment seat (4). Both ends of the adjustment shaft (31) extend to the outside of the locking block (3), and both ends of the adjustment shaft (31) are connected to the locking block (3). A second spring (32) is provided on the surface of the adjustment shaft (31).

6. The linkage-type vibration damping seat tube according to claim 1, characterized in that, A front arc plate (33) protrudes from one side of the top of the locking block (3), and a rear arc plate (35) protrudes from the other side of the top of the locking block (3). A stress dispersion groove (34) is formed between the front arc plate (33) and the rear arc plate (35).

7. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The seat tube roller (5) is provided with a roller connecting shaft (51) that is rotatably connected to the inner wall of the groove (23). The seat tube roller (5) is fixedly connected with a fixing pin connected to the roller connecting shaft (51) on the side wall away from the lower connecting rod (2).

8. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The top of the seat tube shaft (11) is provided with a shaft plug (16), and the seat tube shaft (11) contacts the seat tube roller (5) through the shaft plug (16). The vertical section of the shaft plug (16) is convex.

9. The linkage-type vibration damping seat tube according to claim 1, characterized in that, The spring fixing seat (13) is connected to the bottom of the inner cavity of the shock absorber tube (1) by threads.

10. The linkage-type vibration damping seat tube according to claim 1, characterized in that, A shaft sealing ring (15) is provided on the surface of the seat tube shaft (11) and at the bottom of the rubber wheel (17). The outer ring wall of the shaft sealing ring (15) is connected to the inner wall of the shock-absorbing seat tube (1).

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