Rotation stopping structure of rear fork

Abstract

The invention discloses a rotation stopping structure of a rear fork. Comprising a connecting shaft, the connecting shaft comprises a first end and a second end, and the strength of the second end is lower than that of the first end; the connecting ends of two supporting arms of the rear fork unit are assembled on the first end and the second end of the connecting shaft respectively, and mounting grooves are formed in the connecting ends; and a rotation stopping sheet, wherein the rotation stopping sheet is assembled in the mounting groove. The strength of the rotation stopping piece at the first end is larger than that of the rotation stopping piece at the second end. The rotation stopping pieces with different strength are arranged at the two connecting ends of the rear fork and the shaft, the high-strength rotation stopping piece is arranged at the high-strength shaft end, the low-strength end is protected through the high-strength end, the probability of shaft breakage of the low-strength end is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-rotation structures, in particular to a rear fork anti-rotation structure. Background Art

[0002] The left and right shafts of the hub motor are usually designed with one end solid and the other end hollow, and the hollow end is used for wiring. For hub motors installed on off-road vehicles or e-sports vehicles, the left and right shafts are usually used to install the two arms of the rear fork. When used in competitive gameplay, the shaft of the hub motor is subjected to greater force and the hollow end is prone to breakage. For this reason, the applicant filed this application. Summary of the Invention

[0003] In response to the deficiencies in the prior art, the present invention provides a rear fork anti-rotation structure. Anti-rotation plates of different strengths are arranged at the two connecting ends of the rear fork and the shaft. A high-strength anti-rotation plate is arranged at the high-strength shaft end, so that the high-strength end protects the low-strength end, reduces the probability of the low-strength end shaft breaking, and extends the service life.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A rear fork anti-rotation structure, comprising a connecting shaft comprising a first end and a second end having a lower strength than the first end; a rear fork unit, wherein the connecting ends of the two arms of the rear fork unit are respectively assembled on the first end and the second end of the connecting shaft, and mounting grooves are formed at the connecting ends; and a rotation-stopping plate, the rotation-stopping plate being assembled in the mounting groove; The strength of the anti-rotation piece at the first end is greater than the strength of the anti-rotation piece at the second end.

[0005] In the above technical solution, preferably, the thickness of the anti-rotation plate at the first end is greater than the thickness of the anti-rotation plate at the second end.

[0006] In the above technical solution, preferably, the rear fork is made of aluminum, and the anti-rotation plate is made of steel.

[0007] In the above technical solution, preferably, the connecting shaft is an output shaft of the hub motor, and the first end and the second end are respectively arranged on the left and right sides of the hub motor.

[0008] In the above technical solution, preferably, the first end is a solid end and the second end is a hollow end.

[0009] In the above technical solution, preferably, the connecting ends of the two arms of the rear fork unit are respectively provided with open grooves so as to be assembled on the connecting shaft through the open grooves.

[0010] In the above technical solution, preferably, the mounting groove is opened on the outer side walls of the two arms of the rear fork unit and is in fluid communication with the open groove.

[0011] In the above technical solution, preferably, the shape and size of the anti-rotation plate are adapted to the shape and size of the installation groove, and both shapes are non-circular.

[0012] In the above technical solution, preferably, the shape of the anti-rotation plate and the shape of the installation groove are both polygonal.

[0013] In the above technical solution, preferably, the anti-rotation plate is provided with a through hole adapted to the mounting end of the connecting shaft; and the connecting shaft is provided with a nut for axially limiting the anti-rotation plate and / or the rear fork unit.

[0014] The beneficial effects of the present invention are: The present invention provides anti-rotation plates of different strengths at the two connecting ends of the rear fork and the shaft. The high-strength anti-rotation plate is provided at the high-strength shaft end, so that the high-strength end protects the low-strength end, reduces the probability of the low-strength end shaft breaking, and extends the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation state of the present invention.

[0016] Figure 2 It is a schematic diagram of the decomposition state of the present invention.

[0017] Figure 3 Schematic diagram of the rear fork unit and the anti-rotation plate in the separated state of the present invention.

[0018] Figure 4 Schematic diagram of two anti-rotation plates of different thicknesses according to the present invention.

[0019] Figure 5 This is a schematic diagram of the present invention being installed on a wheel. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figure 1-Figure 5 A rear fork anti-rotation structure includes a connecting shaft 1, a rear fork unit 2 and an anti-rotation plate 3.

[0021] The connecting shaft 1 includes two ends with different strengths, namely a first end 11 and a second end 12 , wherein the strength of the first end 11 is greater than the strength of the second end 12 , such as the first end 11 is a solid end and the second end 12 is a hollow end.

[0022] As one of the embodiments, the connecting shaft 1 is the output shaft of the hub motor 4, the first end 11 and the second end 12 are respectively arranged on the left and right sides of the hub motor 4, and the hollow second end 12 is used for routing the hub motor 4, which has a hollow channel for the line to pass through. Therefore, the strength of this end of the hub motor 4 will be lower than the strength of the other solid end.

[0023] The rear fork unit 2 includes two arms 21 arranged on the left and right, one arm 21 is assembled at the first end 11, and the other arm 21 is assembled at the second end 12. The two arms 21 can be separated from each other, or they can be assembled into one body through a connecting piece at their front ends. Of course, the connecting piece and the two arms can also be formed as one piece. For details, please refer to the existing design.

[0024] Regarding the connection method between the support arm 21 and the end of the connecting shaft 1, as one embodiment, an open slot 211 is defined at the connecting end of the support arm 21 and the connecting shaft 1, such as at the rear end thereof. The open slot 211 is snap-fitted to the shaft ends (first end 11, second end 12). Since the end of the connecting shaft 1 is a non-circular end with a cut surface, the open slot 211 can be designed to be U-shaped accordingly. The rear end of the support arm 21 is assembled to the end of the connecting shaft 1 through the open end of the open slot 211.

[0025] In this embodiment, a mounting groove 212 is provided on the outer side wall of the connecting end of the support arm 21 and the connecting shaft 1, and the mounting groove 212 can be fluidically connected to the opening groove 211. A through hole 31 is provided on the anti-rotation plate 3 to match the connecting end of the connecting shaft 1, so that it can be assembled at the first end 11 and the second end 12 respectively, and then the anti-rotation plate 3 is buckled into the mounting groove 212 to form a connection relationship with the support arm 21 of the rear fork unit 2.

[0026] In this embodiment, the shape and size of the anti-rotation piece 3 are adapted to the shape and size of the installation groove 212, and both shapes are non-circular, such as polygonal shapes, specifically quadrilateral.

[0027] The non-circular anti-rotation piece 3 cooperates with the rear fork unit 2 to achieve an anti-rotation effect on the rear fork unit 2. At the same time, the anti-rotation piece 3 is subjected to force to solve the wear problem of the rear fork unit 2 during torsional movement.

[0028] The material of the rear fork unit 2 can be aluminum, etc., and the material of the anti-rotation plate 3 can be steel, etc. The aluminum rear fork unit 2 can reduce the weight of the vehicle, and the steel anti-rotation plate 3 can improve the matching strength.

[0029] After the rear fork unit 2 and the anti-rotation plate 3 are assembled, the nut 5 threadedly engaged with the first end 11 and the second end 12 is assembled to axially limit the anti-rotation plate 3 and the rear fork unit 2.

[0030] Because the strength of the two ends of the connecting shaft 1 is different (such as the first end is solid and the second end is hollow), the hollow end is more likely to break. Based on this, in this embodiment, the strength of the stop plate 3 set at the first end 11 is greater than the strength of the stop plate 3 set at the second end 12. Specifically, the thickness of the stop plate 3 at the first end 11 is greater than the thickness of the stop plate 3 at the second end 12, such as the thickness of the stop plate 3 at the first end 11 is selected to be 6 mm, and the thickness of the stop plate 3 at the second end 12 is selected to be 3 mm; or the stop plate 3 at the first end 11 is relatively harder, and the stop plate 3 at the second end 12 is relatively softer.

[0031] By adjusting the strength of the anti-rotation piece 3 and optimizing the load distribution, the solid end is made to bear a greater force and the hollow end is protected to prevent it from breaking, thereby greatly improving the fatigue life and reliability of the shaft.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rear fork anti-rotation structure, characterized by: include a connecting shaft comprising a first end and a second end having a lower strength than the first end; a rear fork unit, wherein the connecting ends of the two arms of the rear fork unit are respectively assembled on the first end and the second end of the connecting shaft, and a non-circular mounting groove is formed at the connecting ends; and a non-circular anti-rotation piece assembled in the mounting groove; The strength of the anti-rotation piece at the first end is greater than the strength of the anti-rotation piece at the second end.

2. The rear fork anti-rotation structure according to claim 1, characterized in that: The thickness of the anti-rotation piece at the first end is greater than the thickness of the anti-rotation piece at the second end.

3. A rear fork anti-rotation structure according to claim 1 or 2, characterized in that: The rear fork is made of aluminum, and the anti-rotation plate is made of steel.

4. The rear fork anti-rotation structure according to claim 1, characterized in that: The connecting shaft is an output shaft of the hub motor, and the first end and the second end are respectively arranged on the left and right sides of the hub motor.

5. The rear fork anti-rotation structure according to claim 1 or 4, characterized in that: The first end is a solid end, and the second end is a hollow end.

6. The rear fork anti-rotation structure according to claim 1, characterized in that: The connecting ends of the two supporting arms of the rear fork unit are respectively provided with open slots so as to be assembled on the connecting shaft through the open slots.

7. The rear fork anti-rotation structure according to claim 6, characterized in that: The mounting groove is formed on the outer side walls of the two supporting arms of the rear fork unit and is in fluid communication with the opening groove.

8. The rear fork anti-rotation structure according to claim 1, characterized in that: The shape and size of the anti-rotation piece are adapted to the shape and size of the installation groove, and both shapes are non-circular.

9. The rear fork anti-rotation structure according to claim 1 or 8, characterized in that: The shape of the anti-rotation piece and the shape of the installation groove are both polygonal.

10. The rear fork anti-rotation structure according to claim 1, characterized in that: The anti-rotation plate is provided with a through hole adapted to the mounting end of the connecting shaft; The connecting shaft is provided with a nut for axially limiting the anti-rotation plate and / or the rear fork unit.

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