Soft-tail four-connecting-rod damping frame

Abstract

The utility model relates to an electric bicycle, in particular to a soft-tail four-connecting-rod damping bicycle frame which comprises a middle pipe, the middle of the middle pipe is provided with a fourth rotating hole, and the two ends of the middle pipe are provided with an upper rotating seat and a lower rotating seat respectively. The damping arm is provided with a first rotating hole, a second rotating hole and a third rotating hole which are distributed in a triangular shape, and the first rotating hole is rotationally connected with the upper rotating seat; one end of the damper is rotationally arranged on the second rotating hole, and the other end of the damper is rotationally arranged on the fourth rotating hole; a first connecting hole and a second connecting hole are formed in the two ends of the rear lower fork respectively, and the first connecting hole is rotationally connected with the lower rotating seat; the two ends of the rear upper fork are provided with a rear hook claw and a third connecting hole respectively, the third connecting hole is rotationally connected with the third rotating hole, and the rear hook claw is rotationally connected with the second connecting hole. According to the soft-tail four-connecting-rod damping frame, damping is achieved through the cooperation of the four-connecting-rod structure and the damper, the overall structure is simple and compact, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to an electric bicycle, in particular to a soft-tail four-link shock-absorbing frame. Background Art

[0002] In order to improve the shock-absorbing effect of an electric bicycle, shock absorbers are installed on both the front fork and the rear fork.

[0003] The shock absorbers of the existing frame are installed on the rear fork and the rear frame. For example, an electric vehicle frame with good shock-absorbing effect disclosed in CN209553416U requires two shock absorbers, resulting in high cost and a relatively complex structure of the rear frame, and the overall structure is not compact. Summary of the Utility Model

[0004] In order to solve the problems of high cost, complex structure and non-compact structure, the utility model provides a soft-tail four-link shock-absorbing frame, and the specific technical solution is as follows:

[0005] A soft-tail four-link shock-absorbing frame includes: a middle tube, a fourth rotation hole is provided in the middle of the middle tube, and an upper rotation seat and a lower rotation seat are respectively provided at both ends of the middle tube; a shock-absorbing arm, which is provided with a first rotation hole, a second rotation hole and a third rotation hole distributed in a triangle, and the first rotation hole is rotationally connected with the upper rotation seat; a shock absorber, one end is rotatably arranged on the second rotation hole, and the other end is rotatably arranged on the fourth rotation hole; a rear lower fork, which is respectively provided with a first connection hole and a second connection hole at both ends, and the first connection hole is rotationally connected with the lower rotation seat; and a rear upper fork, which is respectively provided with a rear hook claw and a third connection hole at both ends, the third connection hole is rotationally connected with the third rotation hole, and the rear hook claw is rotationally connected with the second connection hole.

[0006] Preferably, the middle tube includes: a seat tube, the upper rotation seat is arranged at the top of the seat tube; and a support tube, the support tube is arranged on one side of the seat tube and below the upper rotation seat, a support cavity is provided on the support tube, the fourth rotation hole is provided on the support tube and communicates with the support cavity, the lower rotation seat is arranged at the bottom of the support tube, and the shock absorber is movably inserted into the support cavity.

[0007] Further, an avoidance groove communicating with the support cavity is further provided at the top of the support tube, and the avoidance groove is also arranged opposite to the shock absorber.

[0008] Preferably, the shock-absorbing arm is provided with a first shock-absorbing groove and a second shock-absorbing groove, the first rotation hole is arranged on the first shock-absorbing groove, and the second rotation hole and the third rotation hole are respectively arranged at both ends of the second shock-absorbing groove.

[0009] Preferably, both ends of the rear lower fork are respectively arranged in a first connection groove and a second connection groove. The first connection groove communicates with the first connection hole, and the second connection groove communicates with the second connection hole.

[0010] Further, a rear connection block is provided on the rear hook claw. The rear connection block is movably inserted into the second connection groove and is rotatably connected to the second connection hole.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] A soft-tail four-link shock-absorbing frame provided by the present utility model realizes shock absorption through a four-link structure cooperating with a shock absorber. The overall structure is simple and compact, reducing costs.

[0013] The shock absorber is compressed by the shock-absorbing arm, and then the compression amount of the shock absorber is decomposed into the swing of the shock-absorbing arm, reducing the bounce. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present application;

[0015] Figure 2 is a front view of the present application;

[0016] Figure 3 is a schematic structural diagram of the middle tube;

[0017] Figure 4 is a schematic structural diagram of the shock-absorbing arm;

[0018] Figure 5 is a schematic structural diagram of the rear lower fork;

[0019] Figure 6 is a schematic structural diagram of the rear upper fork;

[0020] Figure 7 is a schematic structural diagram of the shock absorber;

[0021] Figure 8 is an assembly schematic diagram of the middle tube, the front frame and the reduction motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below in conjunction with the accompanying drawings.

[0023] As Figures 1 to 7As shown in the figure, a soft-tail four-link shock-absorbing frame includes a middle tube 1, a shock-absorbing arm 6, a shock absorber 5, a rear lower fork 2, and a rear upper fork 3. A fourth rotation hole 154 is provided in the middle of the middle tube 1, and an upper rotation seat 16 and a lower rotation seat 13 are respectively provided at both ends of the middle tube 1; the shock-absorbing arm 6 is provided with a first rotation hole 61, a second rotation hole 62, and a third rotation hole 63, and the first rotation hole 61, the second rotation hole 62, and the third rotation hole 63 are distributed in a triangular shape. The first rotation hole 61 is rotationally connected to the upper rotation seat 16; one end of the shock absorber 5 is rotationally connected to the second rotation hole 62, and the other end of the shock absorber 5 is rotationally connected to the fourth rotation hole 154; the two ends of the rear lower fork 2 are respectively provided with a first connection hole 21 and a second connection hole 22, and the first connection hole 21 is rotationally connected to the lower rotation seat 13; the two ends of the rear upper fork 3 are respectively provided with a rear hook 4 and a third connection hole 33, the third connection hole 33 is rotationally connected to the third rotation hole 63, and the rear hook 4 is rotationally connected to the second connection hole 22.

[0024] The middle tube 1, the shock-absorbing arm 6, the rear lower fork 2, and the rear upper fork 3 form a four-link mechanism, enabling the frame to be in a freely rotatable state. Then, the middle tube 1, the shock-absorbing arm 6, and the rear upper fork 3 are connected by the shock absorber 5 to form a shock-absorbing structure. The overall number of components is small, the structure is simple and compact, the number of shock absorbers 5 is reduced, the assembly is convenient, and the cost is lowered.

[0025] Among them, an upper rotation hole 151 is provided on the upper rotation seat 16, and the upper rotation hole 151 is rotationally connected to the first rotation hole 61 of the shock-absorbing arm 6 through a first connecting shaft 71. The second rotation hole 62 is rotationally connected to the top of the shock absorber 5 through a second connecting shaft 72, the third rotation hole 63 is rotationally connected to the third connection hole 33 through a third connecting shaft 73, and the fourth rotation hole 154 is rotationally connected to the bottom of the shock absorber 5 through a fourth connecting shaft 74. A lower rotation hole 155 is provided on the lower rotation seat 13, and the lower rotation hole 155 is rotationally connected to the first connection hole 21 through a fifth connecting shaft 75, and the second connection hole 22 is rotationally connected to the rear hook 4 through a sixth connecting shaft 76.

[0026] As Figure 3 shown, in order to facilitate the processing of the middle tube 1, improve the strength of the middle tube 1, and reduce the cost of the middle tube 1, the middle tube 1 includes a seat tube 11 and a support tube 12. The seat tube 11 is a circular tube, and the upper rotation seat 16 is welded to the top of the seat tube 11; the support tube 12 is arranged on one side of the seat tube 11 and is located below the upper rotation seat 16. A support cavity 121 is provided on the support tube 12, the fourth rotation hole 154 is provided on the support tube 12 and is communicated with the support cavity 121, the lower rotation seat 13 is welded to the bottom of the support tube 12, and the shock absorber 5 is movably inserted into the support cavity 121. The seat tube 11 and the support tube 12 are of an integral structure and can be made of profiles, preferably aluminum profiles.

[0027] As Figure 3 and Figure 8As shown in the figure, a drive seat 14 is welded to the bottom of the middle tube 1. A reduction motor is installed on the drive seat 14, and the reduction motor is connected to the rear wheel through a chain. On one side of the middle tube 1, a front frame 81 is also installed, and a head tube 82 is provided at the end of the front frame 81.

[0028] As Figure 3 shown, in order to prevent the shock absorber 5 from interfering with the support tube 12, an avoidance groove 122 communicating with the support cavity 121 is also provided at the top of the support tube 12, and the avoidance groove 122 is also arranged opposite to the shock absorber 5. The avoidance groove 122 increases the moving space of the shock absorber 5 and avoids the shock absorber 5 from colliding with the support tube 12.

[0029] As Figure 4 shown, in order to improve the strength of the shock absorber arm 6 and the reliability and stability of the connection, a first shock absorption groove 66 and a second shock absorption groove 67 are provided on the shock absorber arm 6. The first rotation hole 61 is arranged on the first shock absorption groove 66, and the second rotation hole 62 and the third rotation hole 63 are respectively arranged at both ends of the second shock absorption groove 67. The first shock absorption groove 66 is also movably inserted on the upper rotation seat 16, and the second shock absorption groove 67 is movably inserted on the top of the shock absorber 5 and the support tube 12.

[0030] As Figure 5 shown, at both ends of the rear lower fork 2, a first connection groove 25 and a second connection groove 26 are respectively arranged. The first connection groove 25 communicates with the first connection hole 21, and the second connection groove 26 communicates with the second connection hole 22. The first connection groove 25 is movably inserted on the lower rotation seat 13. The first connection groove 25 improves the reliability of the connection with the lower connection seat and can limit the axis position.

[0031] As Figure 6 shown, a rear connection block 41 is provided on the rear hook claw 4, and a rear connection hole 42 is provided on the rear connection block 41. The rear connection block 41 is movably inserted into the second connection groove 26, and the rear connection hole 42 is rotatably connected to the second connection hole 22 through a sixth connection shaft 76.

[0032] During shock absorption, the rear upper fork 3 moves upward. Due to the limitation of the shock absorber arm 6, the rear upper fork 3 moves towards the middle tube 1. The rear upper fork 3 pushes the shock absorber arm 6 to rotate around the first connection shaft 71. The shock absorber arm 6 compresses the shock absorber 5 through the second connection shaft 72. The shock absorber arm 6 realizes shock absorption by rotating around the first connection shaft 71, converts the compression amount of the shock absorber 5 into the swing of the shock absorber arm 6, reduces the jump during shock absorption, and solves the problem that in the existing frame, since the compression amount of the shock absorber 5 is all transmitted to the seat, resulting in a relatively serious jump and poor comfort.

[0033] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A soft-tail four-link shock-absorbing frame, characterized in that: include: A middle tube (1), wherein a fourth rotating hole (154) is provided in the middle of the middle tube (1), and an upper rotating seat (16) and a lower rotating seat (13) are respectively provided at both ends of the middle tube (1); The shock absorbing arm (6) is provided with a first rotating hole (61), a second rotating hole (62) and a third rotating hole (63) distributed in a triangular shape, wherein the first rotating hole (61) is rotatably connected to the upper rotating seat (16); A shock absorber (5), one end of which is rotatably disposed on the second rotating hole (62), and the other end of which is rotatably disposed on the fourth rotating hole (154); A rear chain stay (2), with a first connection hole (21) and a second connection hole (22) respectively provided at both ends, wherein the first connection hole (21) is rotatably connected to the lower rotating seat (13); as well as The rear seat fork (3) is provided with a rear hook (4) and a third connecting hole (33) at both ends, respectively; the third connecting hole (33) is rotatably connected to the third rotating hole (63); and the rear hook (4) is rotatably connected to the second connecting hole (22).

2. A soft-tail four-link shock-absorbing frame according to claim 1, characterized in that: The middle tube (1) comprises: A seat tube (11), wherein the upper rotating seat (16) is arranged on the top of the seat tube (11); and A support tube (12), the support tube (12) being arranged on one side of the seat tube (11) and being located below the upper rotating seat (16), the support tube (12) being provided with a support cavity (121), the fourth rotating hole (154) being arranged on the support tube (12) and being communicated with the support cavity (121), the lower rotating seat (13) being arranged at the bottom of the support tube (12), and the shock absorber (5) being movably inserted into the support cavity (121).

3. A soft-tail four-link shock-absorbing frame according to claim 2, characterized in that: The top of the support tube (12) is also provided with a avoidance groove (122) communicating with the support cavity (121), and the avoidance groove (122) is also arranged opposite to the shock absorber (5).

4. The soft-tail four-link shock-absorbing frame according to claim 1, characterized in that: The shock absorbing arm (6) is provided with a first shock absorbing groove (66) and a second shock absorbing groove (67); the first rotating hole (61) is provided on the first shock absorbing groove (66); and the second rotating hole (62) and the third rotating hole (63) are respectively provided at two ends of the second shock absorbing groove (67).

5. The soft-tail four-link shock-absorbing frame according to claim 1, characterized in that: The two ends of the rear chain stay (2) are also respectively provided with a first connecting groove (25) and a second connecting groove (26); the first connecting groove (25) is communicated with the first connecting hole (21), and the second connecting groove (26) is communicated with the second connecting hole (22).

6. The soft-tail four-link shock-absorbing frame according to claim 5, characterized in that: The rear hook claw (4) is provided with a rear connection block (41), and the rear connection block (41) is movably inserted into the second connection groove (26) and is rotatably connected to the second connection hole (22).

Images