Connecting structure of rear fork mechanism

Abstract

The utility model relates to the technical field of frame accessories, in particular to a connecting structure of a rear fork mechanism, which comprises an upper fork assembly and a lower fork assembly, the upper fork assembly comprises a first upper fork and a second upper fork, and the lower fork assembly comprises a first lower fork and a second lower fork. A first connecting frame is arranged between the first upper fork and the first lower fork, the first connecting frame comprises a first connecting part and a second connecting part, the first connecting part and the first upper fork are welded together, the second connecting part is detachably connected with the first lower fork, and the second upper fork is connected with the second lower fork through a second connecting frame; the first connecting frame and the first lower fork are machined separately, the second connecting frame and the second lower fork are machined separately, forming of the lower fork assembly, the first connecting frame and the second connecting frame is facilitated, the forming rate and the machining efficiency of the lower fork assembly, the first connecting frame and the second connecting frame can be further improved, and therefore the machining cost can be saved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of frame accessories, and in particular to a connection structure of a rear fork mechanism. Background Art

[0002] Electric bikes are small, lightweight, economical, and easy to operate, making them a very popular means of transportation. The frame of an electric bike is a crucial component of the vehicle, directly impacting the overall structural strength, operational stability, safety, and load-bearing capacity of the entire vehicle. Currently, new national standard electric bikes on the market limit motor speed, resulting in slower mileage and reduced frame strength to reduce costs. While this does not affect normal use, accidental collisions can severely damage the lower-strength frame, posing a serious safety hazard if not detected in time.

[0003] The frame is a crucial component of an electric bicycle, directly impacting the vehicle's structural strength, operational stability, safety, and load-bearing capacity. An electric bicycle frame typically includes a front fork assembly, a rear fork assembly, and a main frame. The rear fork assembly consists of two upper and two lower forks. Currently, the connection structure on the market is one-piece lower forks with dropouts connected to the upper forks. However, due to the complex structure of the dropouts, the integrated lower fork and dropout assembly results in a low molding rate for the lower forks. Utility Model Content

[0004] In view of the deficiencies or problems existing in the prior art, the present disclosure provides a connection structure of a rear fork mechanism, which has good stability and a simple structure.

[0005] The technical solution adopted by the present disclosure to solve the above-mentioned technical problems is: a connecting structure of a rear fork mechanism, including an upper fork assembly and a lower fork assembly, the upper fork assembly including a first upper fork and a second upper fork, the lower fork assembly including a first lower fork and a second lower fork, a first connecting frame is provided between the first upper fork and the first lower fork, the first connecting frame includes a first connecting part and a second connecting part, the first connecting part is welded to the first upper fork, the second connecting part is detachably connected to the first lower fork, and the second upper fork is connected to the second lower fork via the second connecting frame.

[0006] As a preferred embodiment, the first connecting portion is a first protrusion, the end of the first upper fork is provided with a first connecting groove, the first protrusion is adapted to the first connecting groove, and the first protrusion and the first connecting groove are welded together.

[0007] As a preferred embodiment, the second connecting frame includes a third connecting portion and a fourth connecting portion, the third connecting portion is welded to the second upper fork, and the fourth connecting portion is detachably connected to the second lower fork.

[0008] As a preferred embodiment, the third connecting portion is a second protrusion, the end of the second upper fork is provided with a second connecting groove, the second protrusion is adapted to the second connecting groove, and the second protrusion and the second connecting groove are welded together.

[0009] As a preferred embodiment, the first lower fork and the second lower fork have the same structure, and both the first lower fork and the second lower fork are hollow structures.

[0010] As a preferred embodiment, the first upper fork and the second upper fork have the same structure, and both the first upper fork and the second upper fork are hollow structures.

[0011] In some embodiments, the first connecting frame is provided with a hook structure, and the first connecting portion is provided on a side of the hook structure.

[0012] In some embodiments, the second connecting frame is provided with a hook structure, and the third connecting portion is provided on a side of the hook structure.

[0013] As a preferred embodiment, a connecting rod is provided at one end of the first connecting frame close to the hook structure, and the connecting rod is used to connect to the caliper.

[0014] In some embodiments, the first connecting frame is provided with a first connecting hole, and the first connecting portion is provided on a side of the first connecting hole.

[0015] In some embodiments, the second connecting frame is provided with a second connecting hole, and the third connecting portion is provided on a side of the second connecting hole.

[0016] As a preferred embodiment, a connecting rod is provided at one end of the first connecting frame close to the first connecting hole, and the connecting rod is used to connect to the caliper.

[0017] As a preferred embodiment, an end of the first lower fork away from the first connecting frame and an end of the second lower fork away from the second connecting frame are connected via a third connecting frame.

[0018] As a preferred embodiment, the third connecting frame is provided with a first connecting protrusion, the end of the first lower fork away from the first connecting frame is provided with a third connecting groove, and the first connecting protrusion is welded to the third connecting groove.

[0019] As a preferred embodiment, the third connecting frame is provided with a second connecting protrusion, the end of the second lower fork away from the second connecting frame is provided with a fourth connecting groove, and the second connecting protrusion is welded to the fourth connecting groove.

[0020] As a preferred embodiment, the first connecting frame and the second connecting frame are further connected to hinged seats respectively.

[0021] Compared with existing products, since a first connecting frame is provided between the first upper fork and the first lower fork, the first connecting frame includes a first connecting part and a second connecting part, the first connecting part is welded to the first upper fork, and the second connecting part is detachably connected to the first lower fork, the second upper fork is connected to the second lower fork through the second connecting frame, the first connecting frame and the first lower fork are processed separately, and the second connecting frame and the second lower fork are processed separately, which facilitates the forming of the lower fork assembly, the first connecting frame and the second connecting frame, and can further improve their respective forming rates and processing efficiency, thereby saving processing costs; the first connecting part is welded to the first upper fork, and the second connecting part is detachably connected to the first lower fork, which facilitates the disassembly and assembly of the first connecting frame and the first lower fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the described objects and may contain exaggerated representations. The drawings are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic structural diagram of the connection between the first upper fork and the first connecting frame of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the connection between the second upper fork and the second connecting frame of the present invention;

[0025] Figure 3 This is one of the structural diagrams of the first connecting frame disclosed in the present invention;

[0026] Figure 4 This is one of the structural diagrams of the second connecting frame disclosed in the present invention;

[0027] Figure 5 This is a schematic structural diagram of the connection between the first lower fork and the second lower fork disclosed herein;

[0028] Figure 6 is a structural schematic diagram of the third connecting frame disclosed in the present invention;

[0029] Figure 7 This is a schematic structural diagram of the connection between the first upper fork and the first lower fork of the present invention;

[0030] Figure 8 This is one of the structural diagrams of the hinged seat disclosed in the present invention;

[0031] Figure 9 is a schematic structural diagram of the first connecting member disclosed in the present invention;

[0032] Figure 10This is a structural diagram of the third connecting frame and the second connecting member of the present disclosure;

[0033] Figure 11 This is the second structural diagram of the first connecting frame disclosed in the present invention;

[0034] Figure 12 This is the second structural diagram of the hinged seat disclosed in the present invention;

[0035] Figure 13 This is the second structural schematic diagram of the second connecting frame disclosed in the present invention.

[0036] Description of reference numerals:

[0037] 1. First upper fork; 2. First connecting frame; 3. Second upper fork; 4. Second connecting frame; 5. First lower fork; 6. Second lower fork; 7. Third connecting frame; 8. First connecting member; 9. Connecting rod; 10. First connecting part; 11. Hook structure; 12. Second connecting part; 13. Third connecting part; 14. Fourth connecting part; 15. First connecting protrusion; 16. Second connecting protrusion; 17. Articulated seat; 18. Recessed structure; 19. First mounting hole; 20. Third hinged part; 21. Fourth hinged part; 22. Second connecting member; 23. First connecting hole; 24. Second connecting hole; 25. Third connecting hole. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is described in detail, clearly, and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0039] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0040] Please see Figures 1-4As shown, the present disclosure provides a connection structure of a rear fork mechanism, including an upper fork assembly and a lower fork assembly, the upper fork assembly including a first upper fork 1 and a second upper fork 3, the lower fork assembly including a first lower fork 5 and a second lower fork 6, a first connecting frame 2 is provided between the first upper fork 1 and the first lower fork 5, the first connecting frame 2 including a first connecting portion 10 and a second connecting portion 12, the first connecting portion 10 being welded to the first upper fork 1, the second connecting portion 12 being detachably connected to the first lower fork 5, the second upper fork 3 being connected to the second lower fork 6 via a second connecting frame 4. The first upper fork 1 and the first lower fork 5 are arranged on one side of the rear wheel, and the second upper fork 3 and the second lower fork 6 are arranged on the other side of the rear wheel, the first upper fork 1 and the first lower fork 5 are connected by the first connecting frame 2, the first connecting frame 2 and the first lower fork 5 are no longer integrally formed, the second upper fork 3 and the second lower fork 6 are connected by the second connecting frame 4, the second connecting frame 4 and the second lower fork 6 are no longer integrally formed, the upper fork assembly, the lower fork assembly, the first connecting frame 2 and the second connecting frame 4 are separately processed and formed, and the forming rate and processing efficiency are higher. The first connecting portion 10 and the first upper fork 1 are welded together to connect the first connecting frame 2 and the first upper fork 1 , thereby making the connection more reliable.

[0041] Furthermore, the first connecting portion 10 is a first protrusion, and the end of the first upper stay 1 is provided with a first connecting groove. The first protrusion is adapted to fit within the first connecting groove, and the first protrusion and the first connecting groove are welded together. During driving, the connection between the first upper stay 1 and the first connecting frame 2 is subject to significant shear forces. Welding the first protrusion and the first connecting groove together increases the weld contact surface between the first upper stay 1 and the first connecting frame 2, thereby significantly offsetting the effects of shear forces and making the connection between the first upper stay 1 and the first connecting frame 2 more stable and secure. The second connecting portion 12 is connected to the first lower stay 5 via bolts.

[0042] Furthermore, the second connecting frame 4 includes a third connecting portion 13 and a fourth connecting portion 14. The third connecting portion 13 is welded to the second upper fork 3, and the fourth connecting portion 14 is detachably connected to the second lower fork 6. Specifically, the fourth connecting portion 14 is bolted to the second lower fork 6, making both disassembly and installation relatively convenient. The third connecting portion 13 is a second protrusion. The end of the second upper fork 3 is provided with a second connecting groove. The second protrusion is adapted to fit into the second connecting groove, and the second protrusion and the second connecting groove are welded together. Similarly, during driving, the connection between the second upper fork 3 and the second connecting frame 4 is subject to significant shear forces. Welding the second protrusion and the second connecting groove together increases the weld contact surface between the second upper fork 3 and the second connecting frame 4, thereby significantly offsetting the effects of shear forces and making the connection between the second upper fork 3 and the second connecting frame 4 more stable and secure.

[0043] Please also refer to Figure 7 and Figure 9As shown, in one embodiment of the present disclosure, the second connecting portion 12 and the fourth connecting portion 14 are further hingedly connected to the first connecting member 8, respectively. The first connecting member 8 is provided with a first hinge portion and a second hinge portion, the first hinge portion and the second hinge portion are arranged opposite each other, and the second connecting portion 12 or the fourth connecting portion 14 is arranged between the first hinge portion and the second hinge portion. The first hinge portion is provided with a first working hole, and the second hinge portion is provided with a second working hole. The first working hole and the second working hole correspond to the second connecting portion 12 or the fourth connecting portion 14.

[0044] Please see Figure 7-Figure 8 As shown, in one embodiment of the present disclosure, the first connecting frame 2 and the second connecting frame 4 are further connected to an articulated seat 17, respectively. Specifically, the first lower fork 5 is provided with a first through hole, the first connecting frame 2 is provided with a second through hole, the second connecting portion 12 is a second through hole, and the articulated seat 17 is provided with a third through hole. Bolts pass through the first through hole, the second through hole, and the third through hole, respectively, to connect the first lower fork 5, the first connecting frame 2, and the articulated seat 17. The articulated seat 17 is also provided with a first mounting hole 19, the first connecting frame 2 is provided with a second mounting hole, and the second connecting frame 4 is provided with a third mounting hole. Bolts pass through the first mounting hole 19 and the second mounting hole to connect the first connecting frame 2 and the articulated seat 17, and bolts pass through the first mounting hole 19 and the third mounting hole to connect the second connecting frame 4 and the articulated seat 17. The second lower fork 6 is provided with a fourth through hole, the second connecting frame 4 is provided with a fifth through hole, the fourth connecting portion 14 is the fifth through hole, and the bolts pass through the fourth through hole, the fifth through hole and the third through hole respectively to connect the second lower fork 6, the second connecting frame 4 and the hinge seat 17.

[0045] like Figure 3 、 Figure 4 、 Figure 7 and Figure 8As shown, in some embodiments, the first connecting frame 2 is provided with a hook structure 11, and the first connecting portion 10 is provided on the side of the hook structure 11. Specifically, the hook structure 11 is provided with an opening, and the first connecting portion 10 is provided on the side away from the opening. Such an arrangement makes it possible for the hook structure 11 and the first connecting portion 10 to not interfere with each other. The hook structure 11 is used to connect other bearing components on the frame, and the first connecting portion 10 is welded in the first connecting groove. The second connecting frame 4 is provided with a hook structure 11, and the third connecting portion 13 is provided on the side of the hook structure 11. Similarly, the hook structure 11 is provided with an opening, and the third connecting portion 13 is provided on the side away from the opening. Such an arrangement makes it possible for the hook structure 11 and the third connecting portion 13 to not interfere with each other. The hook structure 11 is used to connect other bearing components on the frame, and the third connecting portion 13 is welded in the second connecting groove. To match the hook structure 11, the hinged seat 17 is provided with a recessed structure 18. The contour and opening direction of the recessed structure 18 are adapted to the opening of the hook structure 11. This arrangement facilitates the removal of the rear wheel, enabling quick removal of the rear wheel. Preferably, a connecting rod 9 is provided at the end of the first connecting frame 2 near the hook structure 11. The connecting rod 9 is used to connect to the caliper. The integral formation of the connecting rod 9 with the first connecting frame 2 eliminates the need for additional components, simplifying the production process and reducing production costs.

[0046] like Figure 11-13 As shown, in some embodiments, the first connecting frame 2 is provided with a first connecting hole 23, and the first connecting portion 10 is disposed to the side of the first connecting hole 23. The second connecting frame 4 is provided with a second connecting hole 24, and the third connecting portion 13 is disposed to the side of the second connecting hole 24. It should be noted that the first and second connecting holes 23, 24 function similarly to the hook structure 11, both being used to connect to other bearing components on the vehicle frame. However, the first and second connecting holes 23, 24 do not enable quick removal of the rear wheel. Whether to use the first connecting frame 2, second connecting frame 4, and hinge seat 17 structure of this embodiment or the structure of the aforementioned embodiment can be determined based on actual conditions. To complement the first and second connecting holes 23, 24, the hinge seat 17 is provided with a third connecting hole 25. Bolts pass through the third connecting hole 25 and the first connecting hole 23 to connect the hinge seat 17 to the first connecting frame 2, and bolts pass through the third connecting hole 25 and the second connecting hole 24 to connect the hinge seat 17 to the second connecting frame 4. Preferably, a connecting rod 9 is provided at one end of the first connecting frame 2 close to the first connecting hole 23 , and the connecting rod 9 is used to connect to the caliper.

[0047] It should be noted that the first lower fork 5 and the second lower fork 6 have the same structure, and both of them are hollow structures. The first upper fork 1 and the second upper fork 3 have the same structure, and both of them are hollow structures. The setting of the hollow structure not only makes the upper fork assembly and the lower fork assembly lighter, but also saves more materials, thereby reducing cost expenditure. The first lower fork 5 and the second lower fork 6 have the same structure, and the production of the lower fork assembly can be achieved using a single device. The first upper fork 1 and the second upper fork 3 have the same structure, and the production of the upper fork assembly can be achieved using a single device, which saves costs on purchasing equipment. Moreover, since the first lower fork 5 and the second lower fork 6 have the same structure, and the first upper fork 1 and the second upper fork 3 have the same structure, there is no need to distinguish between the production of the first lower fork 5 and the second lower fork 6, and there is no need to debug the machine, which saves more time.

[0048] Please see Figure 5-Figure 6 As shown, in one embodiment of the present disclosure, the end of the first lower fork 5 away from the first connecting frame 2 and the end of the second lower fork 6 away from the second connecting frame 4 are connected via a third connecting frame 7. Specifically, the third connecting frame 7 is provided with a first connecting protrusion 15, and the end of the first lower fork 5 away from the first connecting frame 2 is provided with a third connecting groove, and the first connecting protrusion 15 is welded to the third connecting groove. The third connecting frame 7 is provided with a second connecting protrusion 16, and the end of the second lower fork 6 away from the second connecting frame 4 is provided with a fourth connecting groove, and the second connecting protrusion 16 is welded to the fourth connecting groove.

[0049] Please also refer to Figure 10 As shown, a second connecting member 22 is hingedly connected to the side of the third connecting frame 7 away from the first connecting protrusion 15 and the second connecting protrusion 16. Specifically, the third connecting frame 7 is provided with a third hinge portion 20 and a fourth hinge portion 21, with the second connecting member 22 disposed between the third hinge portion 20 and the fourth hinge portion 21. The second connecting member 22 is provided with a connecting channel, the third hinge portion 20 is provided with a third working hole, and the fourth hinge portion 21 is provided with a fourth working hole. The hinge axis passes through the third working hole, the connecting channel, and the fourth working hole to hinge the third connecting frame 7 to the second connecting member 22. The second connecting member 22 is also provided with a fifth connecting portion for connecting to the frame body on the side away from the connecting channel.

[0050] The present application has been described in detail above. Specific examples have been used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is intended only to facilitate understanding of the present application and its core concepts. It should be noted that, without departing from the principles of the present application, a number of improvements and modifications may be made to the present application by a person skilled in the art, and such improvements and modifications shall fall within the scope of protection of the claims of the present application.

Claims

1. A connection structure of a rear fork mechanism, characterized in that: The invention comprises an upper fork assembly and a lower fork assembly, wherein the upper fork assembly comprises a first upper fork (1) and a second upper fork (3), and the lower fork assembly comprises a first lower fork (5) and a second lower fork (6). A first connecting frame (2) is provided between the first upper fork (1) and the first lower fork (5), and the first connecting frame (2) comprises a first connecting portion (10) and a second connecting portion (12). The first connecting portion (10) is welded to the first upper fork (1), and the second connecting portion (12) is detachably connected to the first lower fork (5). The second upper fork (3) is connected to the second lower fork (6) via a second connecting frame (4).

2. The connection structure of the rear fork mechanism according to claim 1, characterized in that: The first connecting portion (10) is a first convex block, and the end of the first upper fork (1) is provided with a first connecting groove. The first convex block is adapted to the first connecting groove, and the first convex block and the first connecting groove are welded together.

3. The connection structure of the rear fork mechanism according to claim 1, characterized in that: The second connecting frame (4) comprises a third connecting portion (13) and a fourth connecting portion (14); the third connecting portion (13) is welded to the second upper fork (3); and the fourth connecting portion (14) is detachably connected to the second lower fork (6).

4. The connection structure of the rear fork mechanism according to claim 3, characterized in that: The third connecting portion (13) is a second convex block, the end of the second upper fork (3) is provided with a second connecting groove, the second convex block is adapted to the second connecting groove, and the second convex block and the second connecting groove are welded together.

5. The connection structure of the rear fork mechanism according to claim 3, characterized in that: The first connecting frame (2) is provided with a hook structure (11), and the first connecting portion (10) is provided on the side of the hook structure (11); the second connecting frame (4) is provided with a hook structure (11), and the third connecting portion (13) is provided on the side of the hook structure (11).

6. The connection structure of the rear fork mechanism according to claim 5, characterized in that: A connecting rod (9) is provided at one end of the first connecting frame (2) close to the hook structure (11), and the connecting rod (9) is used for connecting the caliper.

7. The connection structure of the rear fork mechanism according to claim 3, characterized in that: The first connecting frame (2) is provided with a first connecting hole (23), and the first connecting portion (10) is provided on the side of the first connecting hole (23); the second connecting frame (4) is provided with a second connecting hole (24), and the third connecting portion (13) is provided on the side of the second connecting hole (24); a connecting rod (9) is provided at one end of the first connecting frame (2) close to the first connecting hole (23), and the connecting rod (9) is used to connect the caliper.

8. The connection structure of the rear fork mechanism according to claim 1, characterized in that: An end of the first lower fork (5) away from the first connecting frame (2) and an end of the second lower fork (6) away from the second connecting frame (4) are connected via a third connecting frame (7).

9. The connection structure of the rear fork mechanism according to claim 8, characterized in that: The third connecting frame (7) is provided with a first connecting protrusion (15), and the end of the first lower fork (5) away from the first connecting frame (2) is provided with a third connecting groove, and the first connecting protrusion (15) is welded to the third connecting groove.

10. The connection structure of the rear fork mechanism according to claim 8, characterized in that: The third connecting frame (7) is provided with a second connecting protrusion (16), and the end of the second lower fork (6) away from the second connecting frame (4) is provided with a fourth connecting groove, and the second connecting protrusion (16) is welded to the fourth connecting groove.

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