An adjustable tension electric bicycle motor belt structure

Abstract

This utility model discloses an adjustable electric bicycle motor belt structure, including an electric bicycle rear fork, a rear wheel, a motor body, and a pulley assembly. The rear fork has a motor mounting position, and the motor body is adjustablely mounted at the motor mounting position. The rear wheel is rotatably mounted on the rear fork, and the motor body and the rear wheel are connected via the pulley assembly, thus enabling the motor to drive the rear wheel to rotate. This utility model eliminates the need for disassembly; simply loosening the locking screw and rotating the front-to-back adjustment screw directly drives the motor body to move back and forth along the oblong hole. This allows for fine adjustment of the motor position, thereby controlling the belt tension and preventing it from being too loose or too tight.

Description

Technical Field

[0001] This utility model relates to an electric bicycle, specifically to an electric bicycle motor belt structure with adjustable tension. Background Technology

[0002] In the electric bicycle industry, the use of belt drives (especially toothed belts) to replace traditional chain drives has gradually become a trend due to their advantages such as low noise, no lubrication required, and ease of cleaning and maintenance. This type of transmission system typically includes a drive pulley mounted on the motor output shaft, a driven pulley mounted on the rear wheel hub, and a toothed belt connecting the two.

[0003] However, a key requirement for belt drive systems is maintaining proper belt tension. A belt that is too loose will cause slippage, reduced power transmission efficiency, accelerated wear, and may even lead to tooth skipping and breakage; a belt that is too tight will increase the load on the motor and bearings, accelerating wear on the belt, pulleys, and related bearings, reducing system efficiency and lifespan. During the use of an electric bicycle, the belt tension will change due to natural stretching (initial "run-in" stretching and long-term aging) and slight changes in the rear axle position (such as wheelset fine-tuning, shock absorber compression, etc.), requiring regular inspection and adjustment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an electric bicycle motor belt structure with adjustable tension, so as to solve the problems existing in the background art.

[0005] The adjustable tension electric bicycle motor belt structure of this utility model is achieved through the following technical solution, including the electric bicycle rear fork, rear wheel, motor body and pulley assembly.

[0006] The bicycle rear fork is provided with a motor mounting position, and the motor body can be adjusted and installed at the motor mounting position; the rear wheel is rotatably mounted on the electric bicycle rear fork, and the electric motor body and the rear wheel are connected by a pulley assembly, thereby realizing that the motor drives the rear wheel to rotate.

[0007] As a preferred technical solution, the motor mounting position is provided with multiple oblong holes, and the motor body is provided with locking screws corresponding to the oblong holes. The motor body is fixed to the motor mounting position through the oblong holes and the locking screws.

[0008] As a preferred technical solution, adjusting screws are provided at the front and rear of the motor body, and adjusting holes corresponding to the adjusting screws are provided at the motor mounting position.

[0009] When it is necessary to adjust the front and back of the motor body, loosen the locking screw, and then rotate the adjusting screw to drive the motor body to move back and forth along the oblong hole, thereby adjusting the tension of the pulley assembly.

[0010] As a preferred technical solution, the pulley assembly includes a driving belt gear, a driven belt gear, and a toothed belt;

[0011] The driving belt gear is mounted on the output shaft of the motor body, and the driven belt gear is mounted on the rear wheel;

[0012] The toothed belt is respectively placed on the driving belt gear and the driven belt gear, and the rotation of the driving belt gear drives the driven belt gear to rotate.

[0013] The beneficial effects of this utility model are:

[0014] This invention requires no disassembly of any parts; simply loosening the locking screw and rotating the adjusting screw directly drives the motor body to move back and forth along the oblong hole. This allows for fine adjustments to the motor position, thereby controlling the tension of the toothed belt and preventing it from being too loose or too tight. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 and Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Electric bicycle rear fork; 2. Rear wheel; 3. Motor body; 4. Motor mounting position; 5. Waist-shaped hole; 6. Locking screw; 7. Adjusting screw; 8. Adjusting hole; 9. Drive belt gear; 10. Driven belt gear; 11. Toothed belt. Detailed Implementation

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] like Figures 1-3As shown, the present invention provides an adjustable tension electric bicycle motor belt structure, including an electric bicycle rear fork 1, a rear wheel 2, a motor body 3, and a pulley assembly.

[0022] The bicycle rear fork is provided with a motor mounting position 4, and the motor body 3 can be adjusted and installed at the motor mounting position 4; the rear wheel 2 is rotatably mounted on the electric bicycle rear fork 1, and the electric motor body 3 and the rear wheel 2 are connected by a pulley assembly, thereby realizing that the motor drives the rear wheel 2 to rotate.

[0023] The motor mounting position 4 is provided with multiple oblong holes 5, and the motor body 3 is provided with locking screws 6 corresponding to the oblong holes 5. The motor body 3 is fixed to the motor mounting position 4 through the oblong holes 5 and the locking screws 6.

[0024] In order to achieve the desired tightness, in this embodiment, adjusting screws 7 are provided at the front and rear of the motor body 3, and adjusting holes 8 corresponding to the adjusting screws 7 are provided at the motor mounting position 4.

[0025] When it is necessary to adjust the front and back of the motor body 3, loosen the locking screw 6, and then rotate the adjusting screw 7 to drive the motor body 3 to move back and forth along the oblong hole 5, thereby achieving the tightening and loosening of the pulley assembly.

[0026] In order to achieve the transmission effect, in this embodiment, the pulley assembly includes a driving belt gear 9, a driven belt gear 10, and a toothed belt 11;

[0027] The driving belt gear 9 is mounted on the output shaft of the motor body 3, and the driven belt gear 10 is mounted on the rear wheel 2;

[0028] The toothed belt 11 is respectively placed on the driving belt gear 9 and the driven belt gear 10, and the driving belt gear 9 rotates to drive the driven belt gear 10 to rotate.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A tension-adjustable electric bicycle motor belt structure, characterized in that, Includes the electric bicycle rear fork (1), rear wheel (2), motor body (3), and pulley assembly; The bicycle rear fork is provided with a motor mounting position (4), and the motor body (3) can be adjusted and installed at the motor mounting position (4); the rear wheel (2) is rotatably mounted on the electric bicycle rear fork (1), and the electric motor body (3) and the rear wheel (2) are connected by a pulley assembly, thereby enabling the motor to drive the rear wheel (2) to rotate. The motor mounting position (4) is provided with multiple oblong holes (5), and the motor body (3) is provided with locking screws (6) corresponding to the oblong holes (5). The motor body (3) is fixed to the motor mounting position (4) through the oblong holes (5) and the locking screws (6); the motor body (3) is provided with adjusting screws (7) at the front and rear, and the motor mounting position (4) is provided with adjusting holes (8) corresponding to the adjusting screws (7); When it is necessary to adjust the front and back of the motor body (3), loosen the locking screw (6) and then rotate the adjusting screw (7) to drive the motor body (3) to move back and forth with the waist-shaped hole (5), thereby achieving the tightening and loosening of the pulley assembly.

2. The adjustable tension electric bicycle motor belt structure according to claim 1, characterized in that: The pulley assembly includes a driving belt gear (9), a driven belt gear (10), and a toothed belt (11); The driving belt gear (9) is mounted on the output shaft of the motor body (3), and the driven belt gear (10) is mounted on the rear wheel (2); The toothed belt (11) is placed on the driving belt gear (9) and the driven belt gear (10) respectively, and the driven belt gear (10) is driven to rotate by the rotation of the driving belt gear (9).

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