Shock-absorbing rear fork of scooter

Abstract

The utility model discloses a shock-absorbing rear fork of a scooter. The rear fork assembly comprises a rear fork connecting piece and a rear fork assembly, the rear fork connecting piece comprises a lower connecting plate and two connecting pieces symmetrically arranged on the left side and the right side of the lower connecting plate, the rear fork assembly comprises an upper connecting plate, a rotating shaft and two rear fork arms, and the two rear fork arms are symmetrically arranged on the left side and the right side of the upper connecting plate; the front end of the rear fork arm is connected with the upper connecting plate, a connecting hole allowing the rotating shaft to penetrate through is formed in the front end of the rear fork arm, the rotating shaft penetrates through the connecting hole and is rotationally connected with the rear fork arm, the two ends of the rotating shaft are detachably connected with the connecting pieces on the corresponding sides respectively, and the upper connecting plate is located above the lower connecting plate and located on the front side of the rotating shaft. An elastic damping body is arranged between the upper connecting plate and the lower connecting plate. The damping device is simple in structure, low in cost, convenient to disassemble and assemble, convenient to replace and maintain, and good in damping effect.

Description

Technical Field

[0001] This utility model relates to the technical field of scooter components, and in particular to a shock-absorbing rear fork for scooters. Background Technology

[0002] With the development of technology, people's means of transportation are becoming more and more diversified. Scooters are loved by consumers because they have the advantages of fast folding speed, small size, easy to carry, and the ability to navigate through relatively congested roads.

[0003] Scooters are prone to bumps when traversing uneven roads, affecting safe riding and comfort. Therefore, more and more scooters are incorporating shock-absorbing structures. However, the shock-absorbing structures on the rear fork of existing scooters are often complex, difficult to disassemble and assemble, and costly. After scooters are ridden on poor roads for a long time, the shock-absorbing structure deteriorates significantly. The inconvenience of replacing the shock-absorbing structure greatly affects the consumer experience. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a shock-absorbing rear fork for scooters, which has a simple structure, low cost, convenient assembly and disassembly of the elastic shock absorber, is easy to replace and maintain, and has a good shock absorption effect.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] This utility model discloses a shock-absorbing rear fork for a scooter, comprising a rear fork connector and a rear fork assembly. The rear fork connector includes a lower connecting plate and two connecting pieces symmetrically arranged on the left and right sides of the lower connecting plate. The rear fork assembly includes an upper connecting plate, a pivot, and two rear fork arms. The two rear fork arms are symmetrically arranged on the left and right sides of the upper connecting plate. The front end of each rear fork arm is connected to the upper connecting plate. The front end of each rear fork arm has a connecting hole for the pivot to pass through. The pivot passes through the connecting hole and is rotatably connected to the rear fork arm. Both ends of the pivot are detachably connected to the connecting pieces on the corresponding sides. The upper connecting plate is located above the lower connecting plate and in front of the pivot. An elastic shock absorber is provided between the upper and lower connecting plates.

[0007] In this design, the rear fork connector is installed at the rear of the scooter frame, and the rear wheel is mounted on the rear fork assembly. When the scooter is in motion, if the rear wheel is impacted by uneven or protruding road surfaces, the impact force will cause the rear fork assembly to rotate around its axle. This will cause the upper connecting plate to compress the elastic damping body, generating elastic potential energy, thereby achieving a shock absorption effect with good shock absorption performance.

[0008] This solution consists of an upper connecting plate, a lower connecting plate, and an elastic shock absorber between them, forming a shock-absorbing structure that is simple in structure and low in cost. When the elastic shock absorber suffers severe attenuation after prolonged use, the pivot can be removed, the rear fork connector and rear fork assembly separated, the elastic shock absorber removed and replaced, and then the upper pivot can be installed. The disassembly and assembly process is convenient and easy to replace and maintain.

[0009] Preferably, the elastic damper is shaped like a frustum. The elastic coefficient of the frustum-shaped elastic damper gradually increases with the increase of compression deformation. That is, at the beginning of the rear fork arm rotation, the elastic coefficient of the elastic damper is small and the force deformation is large. As the rear fork arm continues to rotate, the elastic coefficient gradually increases and the force deformation gradually decreases, thereby achieving a very good damping effect and improving the user's damping experience.

[0010] Preferably, the bottom of the upper connecting plate is provided with a connecting post, the connecting post is perpendicular to the upper connecting plate, the elastic damping body is provided with a through hole along the axial direction, the through hole is frustum-shaped, the connecting post is inserted into the through hole, and the top of the through hole matches the connecting post.

[0011] The through hole is truncated cone-shaped, so that the connecting post does not contact the part outside the top of the through hole, thus preventing the connecting post from rotating and squeezing the elastic damper when the rear fork arm rotates. This ensures that the elastic damper is only subjected to the force applied by the upper connecting plate when the rear fork arm rotates.

[0012] Preferably, the angle α between the generatrix of the elastic damper and the bottom surface satisfies: 80°≤α≤85°, and the angle β between the generatrix of the through hole and the bottom surface is greater than the angle α.

[0013] Preferably, the relationship between the height a of the through hole and the length b of the connecting post extending into the through hole is 0.6a≤b≤0.7a.

[0014] Preferably, a limiting plate is provided above the upper connecting plate, the limiting plate being parallel to the lower connecting plate. The left and right ends of the limiting plate are respectively connected to two connecting pieces. The limiting plate has a threaded hole penetrating longitudinally, and a limiting bolt is threaded into the threaded hole. When the elastic damper does not deform, the upper and lower connecting plates are parallel, and the bottom of the limiting bolt contacts the top of the upper connecting plate. The limiting bolt is used to restrict the upward rotation of the upper connecting plate.

[0015] Preferably, the rear fork arm includes a forearm portion and a rear forearm portion. The forearm portion is L-shaped and includes a horizontal portion and a vertical portion. The rear end of the horizontal portion is connected to the lower front side of the vertical portion, and the rear side of the vertical portion is connected to the rear forearm portion. The top surface of the horizontal portion is connected to an upper connecting plate, and the connecting hole is located on the vertical portion. The height of the connecting hole is higher than the height of the upper connecting plate.

[0016] Preferably, the elastic damper is made of polyurethane material, which has the characteristics of high elasticity, wear resistance, and fatigue resistance.

[0017] Preferably, the lower connecting plate has a vertically arranged first limiting piece on the rear side of the top surface, and the upper connecting plate has vertically arranged second limiting pieces symmetrically arranged on the front and rear sides of the bottom surface.

[0018] Preferably, the connecting piece has a through hole that extends horizontally through the connecting piece. A sleeve for inserting a rotating shaft is fitted inside the through hole. The sleeve matches the rotating shaft. An annular baffle is fitted outside the sleeve. The annular baffle is located outside the connecting piece. Screws are symmetrically provided at both ends of the rotating shaft. The screws are coaxial with the rotating shaft. The sleeves on the corresponding sides of the rotating shaft are inserted into the left and right ends respectively. The screws extend out of the sleeves on the corresponding sides. Nuts are fitted on the screws. The nuts are located outside the annular baffles on the corresponding sides.

[0019] Remove the nut from the screw and pull out the shaft to separate the rear fork connector from the rear fork assembly.

[0020] The beneficial effects of this utility model are: (1) It has a simple structure, low cost, and the elastic damping body is easy to disassemble and assemble, easy to replace and maintain, and has a good damping effect. (2) The elastic coefficient of the frustum-shaped elastic damping body will gradually increase with the increase of compression deformation, thereby achieving a very good damping effect and improving the user's damping experience. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment;

[0022] Figure 2 yes Figure 1 Exploded view;

[0023] Figure 3 This is an exploded view of the rear fork assembly;

[0024] Figure 4 This is a cross-sectional view of an embodiment;

[0025] Figure 5 This is a diagram illustrating what happens when the rear wheel of a scooter encounters a bump on the road.

[0026] Figure 6 This is a schematic diagram of the load-displacement relationship curve of an elastic damper.

[0027] In the diagram: 1. Rear fork connector, 2. Rear fork assembly, 3. Lower connecting plate, 4. Connecting piece, 5. Upper connecting plate, 6. Shaft, 7. Rear fork arm, 8. Connecting hole, 9. Elastic shock absorber, 10. Connecting post, 11. Through hole, 12. Limiting plate, 13. Threaded hole, 14. Limiting bolt, 15. Forearm section, 16. Rear fork section, 17. Horizontal section, 18. Vertical section, 19. First limiting piece, 20. Second limiting piece, 21. Through hole, 22. Sleeve, 23. Annular baffle, 24. Screw, 25. Nut, 26. Frame, 27. Rear wheel, 28. Protrusion. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] Example: The shock-absorbing rear fork of the scooter in this example, such as Figures 1 to 5 As shown, the rear fork assembly includes a rear fork connector 1 and a rear fork assembly 2. The rear fork connector 1 includes a lower connecting plate 3 and two connecting pieces 4 symmetrically arranged on the left and right sides of the lower connecting plate 3. The lower connecting plate 3 is horizontally arranged, and the connecting pieces 4 are vertically arranged. The bottom of the connecting pieces 4 is connected to the lower connecting plate 3. The rear fork assembly 2 includes an upper connecting plate 5, a pivot 6, and two rear fork arms 7. The two rear fork arms 7 are symmetrically arranged on the left and right sides of the upper connecting plate 5. The front end of the rear fork arm 7 is connected to the upper connecting plate 5. The front end of the rear fork arm 7 is provided with a connecting hole 8 for the pivot 6 to pass through. The pivot 6 passes through the connecting hole 8 and is rotatably connected to the rear fork arm 7. The two ends of the pivot 6 are detachably connected to the connecting pieces 4 on the corresponding side. The upper connecting plate 5 is located above the lower connecting plate 3 and in front of the pivot 6. An elastic shock absorber 9 is provided between the upper connecting plate 5 and the lower connecting plate 3.

[0030] The elastic damper 9 is shaped like a frustum. The bottom of the upper connecting plate 5 is provided with a connecting post 10, which is perpendicular to the upper connecting plate 5. The elastic damper 9 is provided with a through hole 11 along the axial direction. The through hole 11 is shaped like a frustum. The connecting post 10 is inserted into the through hole 11, and the top of the through hole 11 matches the connecting post 10.

[0031] A limiting plate 12 is provided above the upper connecting plate 5. The limiting plate 12 is parallel to the lower connecting plate 3. The left and right ends of the limiting plate 12 are respectively connected to two connecting pieces 4. A threaded hole 13 is provided in the middle of the limiting plate 12, and a limiting bolt 14 is threadedly connected to the threaded hole 13. When the elastic damping body 9 does not deform, the upper connecting plate 5 and the lower connecting plate 3 are parallel to each other, and the bottom of the limiting bolt 14 contacts the top of the upper connecting plate 5.

[0032] The connecting piece 4 has a through hole 21 that extends horizontally through it. A sleeve 22 for inserting the rotating shaft 6 is fitted inside the through hole 21. The sleeve 22 matches the rotating shaft 6. An annular baffle 23 is fitted outside the sleeve 22, located outside the connecting piece 4. Screws 24 are symmetrically arranged at both ends of the rotating shaft 6, coaxial with it. The left and right ends of the rotating shaft 6 are respectively inserted into the corresponding sleeves 22, and the screws 24 extend out of the corresponding sleeves 22. Nuts 25 are fitted onto the screws 24, located outside the corresponding annular baffle 23. Removing the nuts from the screws and pulling out the rotating shaft allows the rear fork connector and rear fork assembly to be separated.

[0033] The rear fork arm 7 includes a forearm portion 15 and a rear forearm portion 16. The forearm portion 15 is L-shaped and includes a transverse portion 17 and a longitudinal portion 18. The rear end of the transverse portion 17 is connected to the lower front side of the longitudinal portion 18, and the rear side of the longitudinal portion 18 is connected to the rear forearm portion 16. The top surface of the transverse portion 17 is connected to the upper connecting plate 5. The connecting hole 8 is located on the longitudinal portion 18, and the height of the connecting hole 8 is higher than the height of the upper connecting plate 5.

[0034] The lower connecting plate 3 has a vertically arranged first limiting piece 19 on the rear side of the top surface, and the upper connecting plate 5 has a vertically arranged second limiting piece 20 symmetrically arranged on the front and rear sides of the bottom surface.

[0035] In this plan, such as Figure 5 As shown, the rear fork connector is installed at the rear end of the scooter frame 26, the rear wheel 27 is installed on the rear fork assembly 2, and the limiting bolt is used to restrict the upward rotation of the upper connecting plate to prevent the elastic shock absorber from falling out. Figure 5 As shown, when the scooter is in motion, when the rear wheel encounters a protrusion 28 on the road, the impact force on the rear wheel will cause the rear fork assembly to rotate around the pivot, thereby causing the upper connecting plate to press down on the elastic damping body to generate elastic potential energy, thus playing a role in shock absorption.

[0036] This solution consists of an upper connecting plate, a lower connecting plate, and an elastic damping element between them, forming a simple and low-cost damping structure. When the elastic damping element suffers severe attenuation after prolonged use, simply remove the pivot shaft, separate the rear fork connector from the rear fork assembly, remove and replace the elastic damping element, and then reinstall the upper pivot shaft. The disassembly and assembly process is convenient and facilitates replacement and maintenance.

[0037] The diameter of the elastic damper gradually increases from top to bottom. The bottom of the elastic damper contacts the lower connecting plate, and the top of the elastic damper contacts the upper connecting plate. The elastic coefficient of the frustum-shaped elastic damper gradually increases with the increase of compression deformation. That is, at the beginning of the rear fork arm rotation, the elastic coefficient of the elastic damper is small and the force deformation is large. As the rear fork arm continues to rotate, the elastic coefficient gradually increases and the force deformation gradually decreases, thereby achieving a very good damping effect, making the damping smoother and improving the user's damping experience.

[0038] Existing elastic dampers are generally cylindrical. For example... Figure 6 As shown, curve c is the load-displacement relationship curve of a cylindrical elastic damper, and curve d is the load-displacement relationship curve of a frustum-shaped elastic damper. Figure 6 As can be seen, the elastic coefficient of a cylindrical elastic damper is constant, while the elastic coefficient of a frustum-shaped elastic damper gradually increases with the increase of compression deformation.

[0039] The diameter of the through hole gradually increases from top to bottom, and the diameter of the top of the through hole is the same as the diameter of the connecting post. The through hole is frustum-shaped, so that the connecting post does not contact the part outside the top of the through hole, thus preventing the connecting post from rotating and squeezing the elastic damper when the rear fork arm rotates. This ensures that the elastic damper is only subjected to the force applied by the upper connecting plate when the rear fork arm rotates.

[0040] The elastic damper 9 is made of polyurethane material, possessing high elasticity, wear resistance, and fatigue resistance. The angle α between the generatrix of the elastic damper 9 and the bottom surface satisfies: 80°≤α≤85°, and the angle β between the generatrix of the through hole 11 and the bottom surface is greater than the angle α. The relationship between the height a of the through hole 11 and the length b of the connecting column 10 extending into the through hole 11 is 0.6a≤b≤0.7a.

Claims

1. A shock-absorbing rear fork for a scooter, comprising a rear fork connector (1) and a rear fork assembly (2), characterized in that, The rear fork connector (1) includes a lower connecting plate (3) and two connecting pieces (4) symmetrically arranged on the left and right sides of the lower connecting plate (3). The rear fork assembly (2) includes an upper connecting plate (5), a rotating shaft (6) and two rear fork arms (7). The two rear fork arms (7) are symmetrically arranged on the left and right sides of the upper connecting plate (5). The front end of the rear fork arm (7) is connected to the upper connecting plate (5). The front end of the rear fork arm (7) is provided with a connecting hole (8) for the rotating shaft (6) to pass through. The rotating shaft (6) passes through the connecting hole (8) and is rotatably connected to the rear fork arm (7). The two ends of the rotating shaft (6) are detachably connected to the connecting piece (4) on the corresponding side. The upper connecting plate (5) is located above the lower connecting plate (3) and in front of the rotating shaft (6). An elastic shock absorber (9) is provided between the upper connecting plate (5) and the lower connecting plate (3).

2. The scooter shock-absorbing rear fork according to claim 1, characterized in that, The elastic damper (9) is truncated cone-shaped.

3. The scooter shock-absorbing rear fork according to claim 2, characterized in that, The upper connecting plate (5) is provided with a connecting post (10) at the bottom. The connecting post (10) is perpendicular to the upper connecting plate (5). The elastic damping body (9) is provided with a through hole (11) along the axial direction. The through hole (11) is frustum-shaped. The connecting post (10) is inserted into the through hole (11). The top of the through hole (11) matches the connecting post (10).

4. The scooter shock-absorbing rear fork according to claim 3, characterized in that, The angle α between the generatrix of the elastic damper (9) and the bottom surface satisfies: 80°≤α≤85°, and the angle β between the generatrix of the through hole (11) and the bottom surface is greater than the angle α.

5. The scooter shock-absorbing rear fork according to claim 3, characterized in that, The relationship between the height a of the through hole (11) and the length b of the connecting post (10) extending into the through hole (11) is 0.6a≤b≤0.7a.

6. The scooter shock-absorbing rear fork according to claim 1, characterized in that, A limiting plate (12) is provided above the upper connecting plate (5). The limiting plate (12) is parallel to the lower connecting plate (3). The left and right ends of the limiting plate (12) are respectively connected to two connecting pieces (4). The limiting plate (12) is provided with a threaded hole (13) that penetrates the limiting plate (12) longitudinally. The threaded hole (13) is threaded with a limiting bolt (14). When the elastic damping body (9) does not deform, the upper connecting plate (5) and the lower connecting plate (3) are parallel to each other, and the bottom of the limiting bolt (14) contacts the top of the upper connecting plate (5).

7. The scooter shock-absorbing rear fork according to claim 1, characterized in that, The rear fork arm (7) includes a forearm portion (15) and a rear forearm portion (16). The forearm portion (15) is L-shaped and includes a horizontal portion (17) and a vertical portion (18). The rear end of the horizontal portion (17) is connected to the lower front side of the vertical portion (18), and the rear side of the vertical portion (18) is connected to the rear forearm portion (16). The top surface of the horizontal portion (17) is connected to the upper connecting plate (5). The connecting hole (8) is located on the vertical portion (18), and the height of the connecting hole (8) is higher than the height of the upper connecting plate (5).

8. The scooter shock-absorbing rear fork according to claim 1, characterized in that, The elastic damper (9) is made of polyurethane material.

9. The shock-absorbing rear fork for a scooter according to claim 1, characterized in that, The lower connecting plate (3) has a vertically arranged first limiting piece (19) on the rear side of its top surface, and the upper connecting plate (5) has a vertically arranged second limiting piece (20) symmetrically arranged on the front and rear sides of its bottom surface.

10. The scooter shock-absorbing rear fork according to claim 1, characterized in that, The connecting piece (4) is provided with a through hole (21) that runs horizontally through the connecting piece. A sleeve (22) for inserting the rotating shaft (6) is fitted inside the through hole (21). The sleeve (22) matches the rotating shaft (6). An annular baffle (23) is fitted on the outside of the sleeve (22). The annular baffle (23) is located outside the connecting piece (4). The rotating shaft (6) is provided with screws (24) symmetrically at its left and right ends. The screws (24) are coaxial with the rotating shaft (6). The left and right ends of the rotating shaft (6) are respectively inserted into the sleeves (22) on the corresponding side. The screws (24) extend out of the sleeves (22) on the corresponding side. A nut (25) is fitted on the screws (24). The nut (25) is located outside the annular baffle (23) on the corresponding side.

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