A split-type shock-absorbing front fork

Abstract

This invention proposes a split-type shock-absorbing front fork, comprising a first shock-absorbing tube assembly and a second shock-absorbing tube assembly, located on opposite sides of the front wheel of a bicycle. The first mounting tube in the first shock-absorbing tube assembly has a first mounting hole and a first mounting portion, with the first mounting hole located above the first mounting portion. The second mounting tube has a second mounting hole, and its lower end is slidably mounted vertically in the first mounting hole. A first spring is mounted in the first mounting hole, and its top supports the lower end of the second mounting tube. The lower end of a first limiting rod is fixed to the first mounting portion, and its upper end passes through the first mounting hole and extends into the second mounting hole. The first and second shock-absorbing tube assemblies have identical structures. This design effectively improves the stability of the shock-absorbing front fork during extension and retraction.

Description

Technical Field

[0001] This utility model relates to the field of bicycles, specifically to a split-type shock-absorbing front fork. Background Technology

[0002] Existing bicycle forks typically have a shock-absorbing structure, which usually uses an external spring. The spring is usually placed outside the tube and requires a baffle plate to be fixed on the tube to cover the two ends of the spring. This fork structure has poor aesthetics. When the upper and lower tubes are far apart to the maximum extent, the overlap area between the upper and lower tubes is significantly reduced, making the upper tube prone to swaying.

[0003] For example, in an existing patent, the publication number is CN117416455A; the patent title is: A cycling shock-absorbing front fork, including a fork shoulder, a main rod, and a shock-absorbing assembly; the shock-absorbing assembly includes a shock absorber and a shock-absorbing spring; the shock absorber includes a sleeve and a rod body, the outer wall of the sleeve is provided with a lower limit ring, and the outer wall of the rod body is threadedly connected with an upper limit ring; the upper limit ring has an installation chamber inside, the installation chamber is provided with a gear ring inside, the bottom of the upper limit ring has a connection opening, the outer wall of the rod body is provided with a support plate, the support plate has a connection through hole, the top of the support plate is rotatably connected to a transmission gear, the transmission gear is rotatably connected to a ratchet, the ratchet has an adjustment hole, the inner side of the adjustment hole has a spiral groove, the inner side of the transmission gear has a receiving groove, the receiving groove has a pawl hinged in the receiving groove, and the receiving groove has a clamping spring inside; the top of the sleeve is provided with an adjustment post, and the outer wall of the adjustment post is provided with a spiral blade.

[0004] In the aforementioned patent, the rod and sleeve are slidably assembled. However, when the overall tensile length of the two reaches its maximum value, the rod and sleeve wobble due to the smaller overlap area, thereby reducing the stability of the fork.

[0005] Therefore, the technical problem that this application needs to solve is: how to improve the stability of the shock-absorbing fork. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model proposes a split-type shock-absorbing front fork. The solution proposes a shock-absorbing front fork structure, which uses a first spring to elastically install the first mounting tube and the second mounting tube, and a first limiting rod to guide the second mounting tube, so as to make the second mounting tube move more smoothly in the vertical direction, effectively improving the stability of the front fork.

[0007] Specifically, this utility model proposes a split-type shock-absorbing front fork, including a first shock-absorbing tube assembly and a second shock-absorbing tube assembly, which are respectively located on both sides of the front wheel of the bicycle. The first shock-absorbing tube assembly includes:

[0008] A first mounting tube, having a first mounting hole and a first mounting portion, wherein the first mounting hole is located above the first mounting portion;

[0009] A second mounting tube has a second mounting hole, and the lower end of the second mounting tube can be slidably mounted in the first mounting hole in the vertical direction;

[0010] A first spring is installed in the first mounting hole, and the top of the first spring is used to support the lower end of the second mounting tube.

[0011] The first limiting rod has its lower end fixed to the first mounting part, and its upper end passes through the first mounting hole and extends into the second mounting hole.

[0012] The first damping tube assembly and the second damping tube assembly have the same structure.

[0013] Preferably, the top of the first limiting rod is provided with a first stop, and there is a distance between the first stop and the top of the second mounting tube.

[0014] Preferably, the second mounting hole is composed of a first section hole and a second section hole, the first section hole is located above the second section hole, and the diameter of the first section hole is larger than that of the second section hole;

[0015] The first stop is disc-shaped and located inside the first section hole. The diameter of the first stop is larger than the diameter of the second section hole, and the diameter of the first stop is smaller than the diameter of the first section hole.

[0016] Preferably, the lower end of the first limiting rod has a thread for installation in the threaded hole of the first mounting part.

[0017] Preferably, the lower end of the second mounting tube is pressed onto the first spring by a first washer.

[0018] Preferably, a second washer is provided between the outer periphery of the first limiting rod and the inner wall of the second segment hole.

[0019] Preferably, a first limiting sleeve is provided in the first section hole, and the first limiting sleeve is sleeved on the outer periphery of the first stop block;

[0020] The outer circumferential surface of the first limiting sleeve is provided with a first limiting arm, and the second mounting tube is provided with a first insertion groove for mounting the first limiting arm;

[0021] The inner circumferential surface of the first limiting sleeve is provided with a second limiting arm, and the first stop is provided with a second insertion groove for installing the second limiting arm.

[0022] Preferably, the first stop block is provided with a hexagonal hole. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a three-dimensional structural diagram of the split-type shock-absorbing fork proposed in this embodiment from one perspective;

[0025] Figure 2 This is a side view of the split-type shock-absorbing fork proposed in this embodiment;

[0026] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0027] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point B;

[0028] Figure 5 yes Figure 3 A magnified schematic diagram of the structure at point C in the middle;

[0029] Figure 6 This is a three-dimensional structural schematic diagram of the split-type shock-absorbing fork proposed in this embodiment from another perspective;

[0030] Figure 7 yes Figure 6 A magnified schematic diagram of the local structure at point D;

[0031] Figure 8 yes Figure 6 A magnified schematic diagram of the structure at point E in the middle.

[0032] The reference numerals used in the attached figures are as follows:

[0033] 11-First damping tube assembly; 12-Second damping tube assembly; 13-First mounting tube; 14-First mounting hole; 15-First mounting part; 16-Second mounting tube; 17-Second mounting hole; 18-First spring; 19-First limiting rod; 20-First stop; 21-First section hole; 22-Second section hole; 23-Threaded hole; 24-First washer; 25-Second washer; 26-First limiting sleeve; 27-First limiting arm; 28-First insertion groove; 29-Second limiting arm; 30-Second 31-Third mounting tube; 32-Third mounting hole; 33-Second mounting part; 34-Fourth mounting tube; 35-Fourth mounting hole; 36-Second spring; 37-Second limiting rod; 38-Second stop block; 39-Third section hole; 40-Fourth section hole; 41-Third washer; 42-Fourth washer; 43-Second limiting sleeve; 44-Third limiting arm; 45-Third insertion groove; 46-Fourth limiting arm; 47-Fourth insertion groove; 48-Vertical tube; 49-Connecting arm; 50-Connecting ear. Detailed Implementation

[0034] The technical solutions of this application will be further described below with reference to specific embodiments, but this application is not limited to these embodiments.

[0035] like Figures 1 to 8 As shown, this embodiment proposes a split-type shock-absorbing front fork, including a first shock absorber assembly 11 and a second shock absorber assembly 12. The first shock absorber assembly 11 and the second shock absorber assembly 12 are respectively located on both sides of the front wheel of the bicycle. The first shock absorber assembly 11 includes:

[0036] A first mounting tube 13 has a first mounting hole 14 and a first mounting portion 15, wherein the first mounting hole 14 is located above the first mounting portion 15.

[0037] The second mounting tube 16 has a second mounting hole 17, and the lower end of the second mounting tube 16 can be slidably installed in the first mounting hole 14 in the vertical direction.

[0038] A first spring 18 is installed in the first mounting hole 14, and the top of the first spring 18 is used to support the lower end of the second mounting tube 16.

[0039] The first limiting rod 19 has its lower end fixed to the first mounting part 15, and its upper end passes through the first mounting hole 14 and extends into the second mounting hole 17.

[0040] The first damping tube assembly 11 and the second damping tube assembly 12 have the same structure.

[0041] This solution proposes a shock-absorbing front fork structure, which uses a first spring 18 to elastically mount the first mounting tube 13 and the second mounting tube 16, and a first limiting rod 19 to guide the second mounting tube 16, so that the second mounting tube 16 moves more smoothly in the vertical direction, effectively improving the stability of the front fork.

[0042] In one embodiment of this invention, the top of the first limiting rod 19 is provided with a first stop 20, and a distance is left between the first stop 20 and the top end of the second mounting tube 16. When the first spring 18 is in a compressed state, the second mounting tube 16 moves downward, and at this time, the distance left between the first stop 20 and the top end of the second mounting tube 16 is such that the first stop 20 is inside the second mounting tube 16.

[0043] In one embodiment of this invention, the second mounting hole 17 is composed of a first segment hole 21 and a second segment hole 22. The first segment hole 21 is located above the second segment hole 22, and the diameter of the first segment hole 21 is larger than that of the second segment hole 22.

[0044] The first stop 20 is disc-shaped and is located inside the first section hole 21. The diameter of the first stop 20 is larger than the diameter of the second section hole 22, and the diameter of the first stop 20 is smaller than the diameter of the first section hole 21.

[0045] When the first spring 18 is in a stretched state, the second mounting tube 16 moves upward. At this time, the first stop 20 restricts the upward movement space of the second mounting tube 16, preventing the second mounting tube 16 from detaching from the first mounting tube 13. This further improves the stability of the fork in the working state.

[0046] As one embodiment of this invention, the lower end of the first limiting rod 19 has a thread for installation in the threaded hole 23 of the first mounting part 15.

[0047] This solution proposes a specific installation method for the first limiting rod 19.

[0048] In one embodiment of this invention, the lower end of the second mounting tube 16 is pressed onto the first spring 18 by a first washer 24. The first washer 24 is fitted around the outer periphery of the first limiting rod 19 to increase the contact area with the first spring 18, ensuring that the first spring 18 can be fully compressed.

[0049] In one embodiment of this invention, a second washer 25 is provided between the outer periphery of the first limiting rod 19 and the inner wall of the second segment hole 22. This is used to prevent the first limiting rod 19 from swinging and to make the first limiting rod 19 move more smoothly in the vertical direction, thereby further improving the stability of the fork during operation.

[0050] As one embodiment of this example, a first limiting sleeve 26 is provided in the first section hole 21, and the first limiting sleeve 26 is sleeved on the outer periphery of the first stop block 20.

[0051] The outer circumferential surface of the first limiting sleeve 26 is provided with a first limiting arm 27, and the second mounting tube 16 is provided with a first insertion groove 28 for mounting the first limiting arm 27.

[0052] The inner circumferential surface of the first limiting sleeve 26 is provided with a second limiting arm 29, and the first stop block 20 is provided with a second insertion groove 30 for installing the second limiting arm 29.

[0053] Furthermore, there are multiple first limiting arms 27 and multiple second limiting arms 29. The number of first limiting arms 27 and the number of first insertion slots 28 are the same, and the number of second limiting arms 29 and the number of second insertion slots 30 are the same.

[0054] After the first limiting rod 19 is tightened, the first limiting sleeve 26 is installed. The technical advantage of this solution is that it prevents the first limiting rod 19 from rotating or falling off. This effectively ensures the stability and service life of the fork during use, eliminates the need for periodic tightening of the first limiting rod 19, and is also convenient to use.

[0055] In one embodiment of this invention, the first stop 20 is provided with a hexagonal hole. This allows a hexagonal wrench to be used to rotate the first stop 20 through the hexagonal hole, thereby tightening the first limiting rod 19.

[0056] In addition, the structure of the second damping tube assembly 12 will be described. Since the structure and function of the first damping tube assembly 11 and the second damping tube assembly 12 are the same, the technical effects will not be described again below.

[0057] The second damping tube assembly 12 includes:

[0058] The third mounting tube 31 has a third mounting hole 32 and a second mounting part 33, wherein the third mounting hole 32 is located above the second mounting part 33;

[0059] The fourth mounting tube 34 has a fourth mounting hole 35, and the lower end of the fourth mounting tube 34 can be slidably installed in the third mounting hole 32 in the vertical direction;

[0060] The second spring 36 is installed in the third mounting hole 32, and the top of the second spring 36 is used to support the lower end of the fourth mounting tube 34.

[0061] The second limiting rod 37 has its lower end fixed to the second mounting part 33, and its upper end passes through the third mounting hole 32 and extends into the fourth mounting hole 35.

[0062] Furthermore, a second stop 38 is provided at the top of the second limiting rod 37, and a distance is left between the second stop 38 and the top of the fourth mounting tube 34.

[0063] Furthermore, the fourth mounting hole 35 is composed of a third segment hole 39 and a fourth segment hole 40, with the third segment hole 39 located above the fourth segment hole 40, and the diameter of the third segment hole 39 being larger than that of the fourth segment hole 40.

[0064] The second stop 38 is disc-shaped and is located inside the third section hole 39. The diameter of the second stop 38 is larger than the diameter of the fourth section hole 40, and the diameter of the second stop 38 is smaller than the diameter of the third section hole 39.

[0065] Furthermore, the lower end of the second limiting rod 37 has a thread for installation in the threaded hole 23 of the second mounting part 33.

[0066] Furthermore, the lower end of the fourth mounting tube 34 is pressed onto the second spring 36 by the third washer 41.

[0067] Furthermore, a fourth washer 42 is provided between the outer periphery of the second limiting rod 37 and the inner wall of the fourth segment hole 40.

[0068] Furthermore, a second limiting sleeve 43 is provided in the third hole 39, and the second limiting sleeve 43 is sleeved on the outer periphery of the second stop 38;

[0069] The outer peripheral surface of the second limiting sleeve 43 is provided with a third limiting arm 44, and the fourth mounting tube 34 is provided with a third insertion groove 45 for mounting the third limiting arm 44.

[0070] The inner circumferential surface of the second limiting sleeve 43 is provided with a fourth limiting arm 46, and the second stop block 38 is provided with a fourth insertion groove 47 for installing the fourth limiting arm 46.

[0071] Furthermore, the second stop 38 is provided with a hexagonal hole.

[0072] It also includes a vertical tube 48, the lower end of which is fixed with a connecting arm 49. One end of the connecting arm 49 is welded and fixed to the top of the second mounting tube 16, and the other end of the connecting arm 49 is welded and fixed to the top of the fourth mounting tube 34. At this time, the second mounting tube 16 and the fourth mounting tube 34 will not rotate, thereby restricting the rotation of the first limiting sleeve 26 and the second limiting sleeve. Therefore, the threads at the lower ends of the first limiting rod 19 and the second limiting rod 37 will not loosen or fall off.

[0073] In addition, the lower ends of the first mounting tube 13 and the third mounting tube 31 are respectively provided with connecting ears 50, and the connecting ears 50 are provided with through holes for mounting the front wheel axle.

[0074] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A split-type shock-absorbing front fork, comprising a first shock-absorbing tube assembly (11) and a second shock-absorbing tube assembly (12), wherein the first shock-absorbing tube assembly (11) and the second shock-absorbing tube assembly (12) are respectively located on both sides of the front wheel of a bicycle, characterized in that: The first shock absorber tube assembly (11) includes: A first mounting tube (13) has a first mounting hole (14) and a first mounting portion (15), wherein the first mounting hole (14) is located above the first mounting portion (15); The second mounting tube (16) has a second mounting hole (17) and the lower end of the second mounting tube (16) can be slidably installed in the first mounting hole (14) in the vertical direction; A first spring (18) is installed in the first mounting hole (14), and the top of the first spring (18) is used to support the lower end of the second mounting tube (16). The first limiting rod (19) has its lower end fixed to the first mounting part (15) and its upper end passes through the first mounting hole (14) and extends into the second mounting hole (17). The first damping tube assembly (11) and the second damping tube assembly (12) have the same structure.

2. The split-type shock-absorbing fork according to claim 1, characterized in that, The top of the first limiting rod (19) is provided with a first stop (20), and there is a distance between the first stop (20) and the top of the second mounting tube (16).

3. The split-type shock-absorbing fork according to claim 2, characterized in that, The second mounting hole (17) is composed of a first section hole (21) and a second section hole (22). The first section hole (21) is located above the second section hole (22), and the diameter of the first section hole (21) is larger than that of the second section hole (22). The first stop (20) is disc-shaped and is located inside the hole of the first section hole (21). The diameter of the first stop (20) is greater than the diameter of the second section hole (22), and the diameter of the first stop (20) is smaller than the diameter of the first section hole (21).

4. The split-type shock-absorbing fork according to claim 1, characterized in that, The lower end of the first limiting rod (19) has a thread for installation in the threaded hole (23) of the first mounting part (15).

5. The split-type shock-absorbing fork according to claim 1, characterized in that, The lower end of the second mounting tube (16) is pressed onto the first spring (18) by the first washer (24).

6. The split-type shock-absorbing fork according to claim 3, characterized in that, A second washer (25) is provided between the outer periphery of the first limiting rod (19) and the inner wall of the second section hole (22).

7. The split-type shock-absorbing fork according to claim 3, characterized in that, A first limiting sleeve (26) is provided in the first section hole (21), and the first limiting sleeve (26) is sleeved on the outer periphery of the first stop (20); The outer circumferential surface of the first limiting sleeve (26) is provided with a first limiting arm (27), and the second mounting tube (16) is provided with a first insertion groove (28) for mounting the first limiting arm (27). The inner circumferential surface of the first limiting sleeve (26) is provided with a second limiting arm (29), and the first stop block (20) is provided with a second insertion groove (30) for installing the second limiting arm (29).

8. The split-type shock-absorbing fork according to claim 2, characterized in that, The first stop (20) has a hexagonal hole.

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