Rear wheel folding structure

Abstract

The utility model discloses a rear wheel folding structure which comprises a vehicle body rear portion, a rear fork arm and a rear wheel. One end of the rear fork arm is connected with the body rear through a hinge; comprising a state before folding and a state after folding. In the state before folding, the rear wheel is arranged on the rear side of the hinge; in the folded state, the rear wheel is located on the front side of the hinge, and the fender is located on the upper side of the rear wheel all the time under transmission of the follow-up device no matter whether the rear wheel is located on the front side of the hinge before folding or after folding or in the middle state before folding and after folding, so that the problem that the lower fender faces downwards after folding is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of scooters, power-assisted vehicles, two-wheeled electric vehicles or electric bicycles. Background Art

[0002] When a scooter, power-assisted bicycle, two-wheeled electric vehicle or electric bicycle has a fender on the upper part of the rear wheel, if the rear wheel is designed to be folded forward 180 degrees, since the fender generally needs to move synchronously with the rear wheel, the fender will change from its original upward direction to a downward direction. Once folded, the rear wheel fender will face downward and directly contact the ground. The fender will also bear the weight of the entire vehicle body, thereby causing damage to the fender. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a rear wheel folding structure, in which the fender is always on the upper side of the rear wheel under the drive of the follower device, avoiding the problem of the lower fender facing downward after "folding".

[0004] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a rear wheel folding structure, including a rear body, a rear fork arm, and a rear wheel; one end of the rear fork arm is connected to the rear body through a hinge; it includes two states: "before folding" and "after folding"; in the "before folding" state, the rear wheel is on the rear side of the hinge; in the "after folding" state, the rear wheel is on the front side of the hinge.

[0005] Furthermore, including the follower device and the mudguard, no matter it is "before folding", "after folding" or an intermediate state between "before folding" and "after folding", the mudguard is always on the upper side of the rear wheel under the transmission of the follower device.

[0006] Furthermore, when the rear wheel and the fender subsequently rotate around the hinge, the follower device will be linked, so that the follower device drives the fender to rotate around the rear wheel axis.

[0007] Furthermore, the follower device includes a transmission wheel and a transmission wheel. The transmission wheel a rotates coaxially on the rear wheel axle, and the transmission wheel b is fixed to the rear part of the vehicle body. The transmission wheel a and the transmission wheel b are connected by a transmission belt or a transmission chain. The fender is synchronously fixedly connected to the transmission wheel a through a synchronization arm.

[0008] Furthermore, the hinge includes a hinge seat fixed to the front end of the rear fork arm and a hinge shaft fixed to the rear end of the vehicle body; the b transmission wheel is coaxial with the hinge shaft.

[0009] Furthermore, the transmission wheel a and the transmission wheel b are synchronous wheels with the same outer diameter.

[0010] Beneficial effects: For the scooter, power-assisted vehicle, two-wheeled electric vehicle or electric bicycle of the utility model, no matter it is "before folding", "after folding" or an intermediate state between "before folding" and "after folding", the mudguard is always on the upper side of the rear wheel under the transmission of the follower device, avoiding the problem of the lower mudguard facing downwards "after folding". BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the process from "before folding" to "after folding";

[0012] Figure 2 This is a schematic diagram of the structure after the rear wheel is hidden. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] As attached Figures 1 to 2 The rear wheel folding structure shown includes a vehicle body 16, a rear fork arm 7, a rear wheel 15, a fender 1 and a follower device; one end of the rear fork arm 7 is connected to the rear part 13 of the vehicle body 16 via a hinge 41; the rear wheel 15 rotates on the other end of the rear fork arm 7; the fender 1 is on the upper side of the rear wheel 15; the rear wheel 15 and the fender 1 will then be linked to the follower device during the rotation of the fork arm 7 around the hinge 41, so that the follower device drives the fender 1 to rotate around the axis of the rear wheel 15.

[0015] like Figure 1 As shown, this structure includes "before folding" and "after folding"; in the "before folding" state, the rear wheel 15 is on the rear side of the hinge 41; in the "after folding" state, the rear wheel 15 is on the front side of the hinge 41.

[0016] On the basis of “before folding”, the rear wheel 15 and then the fork arm 7 rotate around the hinge 41 until the rear wheel 15 reaches the front side of the hinge 41, and then enters “after folding”.

[0017] like Figure 1 As shown, no matter it is in the state "before folding", "after folding" or an intermediate state between "before folding" and "after folding", the fender 1 is always on the upper side of the rear wheel 15 under the transmission of the follower device.

[0018] A transverse rear axle 5 is fixedly mounted at the rear end of the rear wishbone 7. A rear wheel 15 is coaxially mounted on the axle 5. A receiving slot 17 is provided on the front side of the rear body 13. When folded, the rear wheel 15 and fender 1 are positioned within the slot 17. The follower mechanism includes a drive wheel a 9 and a drive wheel b 12. Drive wheel a 9 coaxially rotates on the rear axle 5, while drive wheel b 12 is fixed to the rear body 13. Drive wheels a 9 and b 12 are connected via a drive belt 14 or a drive chain. The fender 1 is synchronously and fixedly connected to drive wheel a 9 via a synchronization arm 2.

[0019] In this case, the a transmission wheel 9 and the b transmission wheel 12 are synchronous wheels with the same outer diameter; the transmission belt 14 is a toothed transmission belt; and it also includes a tensioning wheel 10 for tensioning the transmission belt 14. The tensioning wheel 10 is rotatably mounted on the tensioning wheel seat 6 through a bearing, and the tensioning wheel seat 6 is fixed to the inner side of the rear fork arm 7.

[0020] like Figure 2 As shown, the hinge 41 includes a hinge seat 8 fixed to the front end of the rear fork arm 7 and a hinge shaft 11 fixed to the tail end of the rear part 13 of the vehicle body; b the transmission wheel 12 is coaxial with the hinge shaft 11.

[0021] In order to improve the stability before folding, in this case, before folding, the rear fork arm 7 and the rear part 13 of the vehicle body are in contact with each other near the upper part of one end, and are connected by a conventional lock or snap structure.

[0022] Working principle:

[0023] like Figure 1 The figure above is "before folding". In the process of folding from "before folding" to "after folding", the rear wheel 15 and the fork arm 7 gradually rotate counterclockwise about 180 degrees around the hinge 41 and enter the position as shown in FIG. Figure 1 In the "After Folding" position in the figure below, if the fender 1 is always synchronized with the rear wishbone 7 during the above process, then when entering the "After Folding" position, the fender 1 should be just below the rear wheel 15. The fender 1 will directly touch the ground when facing downwards, and the fender 1 will bear the weight of the entire vehicle body, thereby causing damage to the fender. However, this problem is completely avoided in this solution, as follows:

[0024] In this case, as the rear wheel 15 and the fender 1 and the subsequent fork arm 7 gradually rotate counterclockwise around the hinge 41, since the b transmission wheel 12 is always fixed, the a transmission wheel 9 will rotate clockwise around its own axis under the constraint of the transmission belt 14 as it follows the rear fork arm 7 to rotate counterclockwise around the hinge 41. When the a transmission wheel 9 and the b transmission wheel 12 are synchronous wheels with the same outer diameter, it can be seen from the transmission relationship that the clockwise rotation speed of the a transmission wheel 9 is always equal to the counterclockwise rotation speed of the rear fork arm 7 around the hinge 41; because the fender 1 and the a transmission wheel 9 are synchronized.

[0025] Based on the above analysis, as the rear wheel 15 and the subsequent fork arm 7 gradually rotate counterclockwise around the hinge 41, the fender 1 also rotates clockwise around the axis of the a transmission wheel 9 along with the fork arm 7 as the fender 1 follows the counterclockwise rotation around the hinge 41. The above two rotational motions cancel each other out, so that the fender 1 is always on the upper side of the rear wheel 15 during the movement. Therefore, this structure ensures that the fender 1 is always on the upper side of the rear wheel 15 under the transmission of the follower device, regardless of whether the rear wheel is "before folding", "after folding" or in an intermediate state between "before folding" and "after folding", so as to avoid the fender 1 directly touching the ground and being damaged when folded.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A rear wheel folding structure, characterized by: The vehicle comprises a rear body (13), a rear fork arm (7), and a rear wheel (15); one end of the rear fork arm (7) is connected to the rear body (13) via a hinge (41); the vehicle comprises two states: "before folding" and "after folding"; in the "before folding" state, the rear wheel (15) is located behind the hinge (41); in the "after folding" state, the rear wheel (15) is located in front of the hinge (41).

2. The rear wheel folding structure according to claim 1, characterized in that: The utility model comprises a follower device and a mudguard (1). No matter it is in a state "before folding", "after folding" or an intermediate state between "before folding" and "after folding", the mudguard (1) is always on the upper side of the rear wheel (15) under the transmission of the follower device.

3. The rear wheel folding structure according to claim 2, characterized in that: When the rear wheel (15) and the fender (1) rotate along with the rear fork arm (7) around the hinge (41), the follower device is linked to drive the fender (1) to rotate around the axis of the rear wheel (15).

4. The rear wheel folding structure according to claim 3, characterized in that: The follower device comprises a transmission wheel (9) and a transmission wheel (12), wherein the transmission wheel (9) coaxially rotates on the rear wheel shaft (5), and the transmission wheel (12) is fixed on the rear part of the vehicle body (13); the transmission wheel (9) and the transmission wheel (12) are connected by a transmission belt (14) or a transmission chain; and the fender (1) is synchronously fixedly connected to the transmission wheel (9) via a synchronization arm (2).

5. The rear wheel folding structure according to claim 4, characterized in that: The hinge (41) comprises a hinge seat (8) fixed to the front end of the rear fork arm (7) and a hinge shaft (11) fixed to the tail end of the rear part (13) of the vehicle body; the b transmission wheel (12) is coaxial with the hinge shaft (11).

6. The rear wheel folding structure according to claim 4, characterized in that: The a transmission wheel (9) and the b transmission wheel (12) are synchronous wheels with the same outer diameter.

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