Two-wheeled vehicle transmission system and two-wheeled vehicle

Abstract

The present utility model relates to a two-wheeled vehicle transmission system and a two-wheeled vehicle. The two-wheeled vehicle transmission system comprises a transmission belt and at least two pulleys. A plurality of belt teeth are arranged at intervals on the inner surface of the transmission belt in the axial direction; the belt teeth are of a V-shaped structure, and the belt teeth on two sides are symmetrically distributed with respect to the axis of the transmission belt; and a meshing slot of a V-shaped structure is formed between every two adjacent belt teeth. Each pulley comprises a pulley hub and a plurality of pulley teeth which are distributed at intervals in the circumferential direction of an outer ring of the pulley hub and match and mesh with the meshing slots. By designing the belt teeth and the pulley teeth into V-shaped symmetrical structures that match each other, lateral constraining forces can be generated during meshing of the belt teeth with the pulley teeth, and the constraining forces on two sides can symmetrically counterbalance each other, so that the belt teeth and the pulley teeth can be automatically centered, thereby avoiding axial movement of the transmission belt, ensuring that the transmission belt does not slip off the pulleys, and achieving stable and smooth operation. Eliminating the retaining ring design of a conventional transmission system achieves a simple and lightweight structure and a clean and aesthetically pleasing appearance.

Description

Two-wheeled vehicle transmission system and two-wheeled vehicle Technical Field

[0001] The utility model relates to the technical field of belt transmission, in particular to a two-wheeled vehicle transmission system and a two-wheeled vehicle. Background Art

[0002] Traditional two-wheeled vehicles, including bicycles, electric bicycles, electric motorcycles or fuel motorcycles, mostly use chains and sprockets to transmit power. However, the chain and sprocket transmission system is prone to wear and tear, shortens its life, requires regular lubrication, and is noisy. Therefore, the transmission of two-wheeled vehicles nowadays mostly adopts a belt and pulley transmission method, which has the advantages of low noise, long life, light weight, and maintenance-free. Although belt drive replaces traditional chain drive, there are many advantages, but it also has its limitations. Ordinary belt drive requires retaining rings on both sides of the pulley to prevent the belt from falling off the pulley, which makes the overall design of the transmission system complicated and bulky, affecting the overall appearance. At the same time, the belt will move back and forth during operation, affecting the riding comfort.

[0003] Summary of the Invention

[0004] The purpose of the utility model is to provide a two-wheeled vehicle transmission system and a two-wheeled vehicle, which can automatically align the belt teeth and the pulley teeth during the operation of the transmission system, thereby preventing the transmission belt from moving and ensuring that the transmission belt does not slip off the pulley, thereby ensuring smooth and comfortable operation. The structure is simple and lightweight, and the appearance is simple and beautiful.

[0005] To achieve the above object, according to a first aspect of the present invention, a two-wheeled vehicle transmission system is provided, comprising:

[0006] A transmission belt, wherein the inner surface of the transmission belt is provided with a plurality of belt teeth spaced apart along the axial direction, the belt teeth are V-shaped and the two sides of the belt teeth are symmetrically distributed about the axis of the transmission belt, and a V-shaped meshing groove is formed between two adjacent belt teeth;

[0007] At least two pulleys include a pulley hub and a plurality of pulley teeth spaced apart along the circumference of the outer ring of the pulley hub and matingly meshing with the meshing groove.

[0008] Optionally, the belt teeth include first belt teeth and second belt teeth, and the first belt teeth and the second belt teeth are symmetrically distributed about the transmission belt axis.

[0009] Optionally, the first belt tooth axis and the second belt tooth axis form an angle of 18°-23° with the transmission belt axis.

[0010] Optionally, both sides of the engagement groove are symmetrically distributed about the axis of the transmission belt, and the depth of the engagement groove gradually deepens from the middle position to both sides.

[0011] Optionally, the engagement groove has a plurality of engagement planes along the axis direction of the transmission belt, and an angle is formed between two adjacent engagement planes to form an engagement edge.

[0012] Optionally, the pulley teeth on both sides are symmetrically distributed about the axis of the outer ring of the pulley hub.

[0013] Optionally, the pulley teeth and the belt teeth have the same width.

[0014] Optionally, the belt tooth surface is an outwardly protruding arc structure.

[0015] Optionally, there is a gap between the first belt teeth and the second belt teeth.

[0016] According to a second aspect of the present invention, there is provided a two-wheeled vehicle comprising:

[0017] body of the vehicle;

[0018] The two-wheeled vehicle transmission system is arranged on the vehicle body.

[0019] The beneficial effect of this utility model is that by designing the belt teeth and pulley teeth into a mutually matching V-shaped symmetrical structure, a lateral restraining force is generated during the meshing of the belt teeth and pulley teeth, and the restraining forces on both sides can be symmetrically offset and balanced, so that the belt teeth and pulley teeth are automatically aligned during operation of the transmission system, preventing the transmission belt from moving and ensuring that the transmission belt does not slip off the pulley, and running smoothly and comfortably. The retaining ring design of the traditional transmission system is eliminated, and the structure is simple and lightweight, with a simple and beautiful appearance.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a two-wheeled vehicle transmission system according to an embodiment of the present invention;

[0022] FIG2 is a first schematic structural diagram of a transmission belt of a two-wheeled vehicle transmission system according to an embodiment of the present invention;

[0023] FIG3 is a second schematic structural diagram of a transmission belt of a two-wheeled vehicle transmission system according to an embodiment of the present invention;

[0024] FIG4 is a first schematic structural diagram of a pulley of a two-wheeled vehicle transmission system according to an embodiment of the present invention;

[0025] FIG5 is a second schematic structural diagram of a pulley of a two-wheeled vehicle transmission system according to an embodiment of the present invention;

[0026] FIG6 is a partial schematic structural diagram of a two-wheeled vehicle according to an embodiment of the present invention;

[0027] In the figure: 1-transmission belt, 11-belt teeth, 111-first belt teeth, 112-second belt teeth, 12-engaging groove, 121-engaging plane, 122-engaging bottom surface, 123-engaging side surface, 124-engaging edge, 2-pulley, 21-pulley hub, 22-pulley teeth, 10-two-wheeled vehicle transmission system, 20-vehicle body. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Referring to FIG. 1 , a two-wheeled vehicle transmission system 10 according to a preferred embodiment of the present application is shown. The two-wheeled vehicle transmission system 10 includes a drive belt 1 and at least two pulleys 2. The inner surface of the drive belt 1 is provided with a plurality of belt teeth 11 spaced apart along its axis. The belt teeth 11 are V-shaped and symmetrically arranged about the axis of the drive belt 1. V-shaped engagement grooves 12 are formed between adjacent belt teeth 11. The pulleys 2 include a pulley hub 21 and a plurality of pulley teeth 22 spaced apart circumferentially along the outer circumference of the pulley hub 21, which engage with the engagement grooves 12.

[0032] According to the solution of the embodiment of the present invention, by designing the belt teeth 11 and the pulley teeth 22 into a mutually matching V-shaped symmetrical structure, a lateral restraining force can be generated during the meshing process of the belt teeth 11 and the pulley teeth 22 to enhance the stability of the meshing between the two, and the restraining forces on both sides can symmetrically offset and balance each other, so that the belt teeth 11 and the pulley teeth 22 are automatically aligned when the transmission system is stationary or running. Through the above design, it is possible to prevent the transmission belt from moving, ensure that the transmission belt does not slip off the pulley 2, and run smoothly and comfortably. This solution removes the retaining ring of the traditional transmission system. Compared with the bulky and complex design of the traditional transmission system, this solution has a simple and lightweight structure and a simple and beautiful appearance.

[0033] The following is a detailed description with specific embodiments:

[0034] 2 and 3 , the belt teeth 11 include a first belt tooth 111 and a second belt tooth 112 symmetrically arranged about the axis of the transmission belt 1. The axis of the first belt tooth 111 and the axis of the second belt tooth 112 form an angle of 18°-23° with the axis of the transmission belt 1.

[0035] Specifically, in this embodiment, the axis of the first belt tooth 111 and the axis of the second belt tooth 112 form an angle of 20° with the axis of the transmission belt 1 .

[0036] In a conventional transmission system, the belt teeth 11 and the pulley teeth 22 are both straight structures, that is, the tooth axis is a straight line. This results in no constraint in the width direction of the transmission belt 1 when the belt teeth 11 and the pulley teeth 22 are engaged. During the operation of the transmission system, the transmission belt 1 is easily detached from the pulley 2. Therefore, a retaining ring is provided in the conventional transmission system to block it. However, the retaining ring is bulky and unsightly, and there is a gap between the retaining ring and the transmission belt 1. Therefore, during the operation of the transmission system, the pulley 2 will still move slightly laterally along the width direction of the transmission belt 1, affecting riding comfort. Therefore, in this embodiment, the first belt teeth 111 and the second belt teeth 112 are arranged to be symmetrically distributed at an angle of 20° to the axis of the transmission belt 1, so that the meshing groove 12 formed between two adjacent belt teeth 1 and the matching meshing pulley teeth 22 are also of the same design. Through the above design, when the belt teeth 11 and the pulley teeth 22 are engaged, the pulley teeth 22 can be limited and stuck in the engagement groove 12 to achieve automatic centering function, solve the problem of movement of the transmission belt 1, and prevent the transmission belt 1 from falling off the pulley 2.

[0037] There is a gap between the first belt teeth 111 and the second belt teeth 112. In this embodiment, the first belt teeth 111 and the second belt teeth 112 are arranged at a certain angle relative to the axis of the transmission belt 1, and the gap formed between them is a triangular structure. The design of this gap can, on the one hand, separate the first belt teeth 111 and the second belt teeth 112, preventing the middle position of the belt teeth 11 from cracking and deforming due to bending stress concentration after long-term use, affecting the meshing process and causing the transmission belt 1 to fall off. On the other hand, this gap can facilitate the discharge of debris, preventing debris from accumulating in the meshing groove 12 for a long time, causing the meshing groove 12 to become shallower and affecting transmission.

[0038] The surface of the belt teeth 11 is an outwardly convex arc structure. The arc-shaped belt teeth 11 can guide the pulley teeth 22 when the transmission system is running, making it easier to fit into the engagement groove 12 for transmission, thereby increasing riding comfort.

[0039] The meshing groove 12 is symmetrically positioned about the axis of the transmission belt 1, and its depth gradually increases from the center toward the sides. The meshing groove 12 forms the space between two adjacent belt teeth 11, and its cross-section itself is V-shaped. This gradually deepening design of the meshing groove 12 allows for better positioning and gripping of the pulley teeth 22, enabling automatic centering and improved meshing stability.

[0040] The meshing groove 12 has a plurality of meshing planes 121 along the axial direction of the transmission belt 1, and a meshing edge 124 is formed at an angle between two adjacent meshing planes 121. In this embodiment, the meshing groove 12 has three meshing planes 121, including a meshing bottom surface 122 located at the bottom of the meshing groove 12 and meshing side surfaces 123 located on both sides of the meshing groove 12. There is an obtuse angle between the meshing side surfaces 123 and the meshing bottom surface 122. Correspondingly, the pulley teeth 22 that cooperate with the meshing groove 12 also have the same design. The design of multiple meshing planes 121 in the meshing groove 12 can increase the contact area between the meshing groove 12 and the pulley teeth 22, and the meshing edge 124 formed at an angle between two adjacent meshing planes 121 can increase the friction between the meshing groove 12 and the pulley teeth 22, so as to improve the stability of the meshing process.

[0041] Please refer to Figures 4 and 5. The pulley teeth 22 are symmetrically distributed on both sides about the outer axis of the pulley hub 21, and the pulley teeth 22 and the belt teeth 11 have the same width. Because the pulley teeth 22 match and mesh with the belt teeth 11 and the meshing groove 12, they also form a V-shaped structure symmetrically distributed about the outer axis of the pulley hub 21. The pulley teeth 22 extend obliquely outward from the center to both sides to adapt to the different depths of the meshing groove 12. At the same time, the pulley teeth 22 also have a meshing mating surface corresponding to the meshing plane 121 in the meshing groove 12. The pulley teeth 22 and the belt teeth 11 have the same width. On the one hand, this can maximize the compatibility of the meshing transmission between the pulley teeth 22 and the belt teeth 11, and on the other hand, it can prevent material waste.

[0042] 6 , the present invention further provides a two-wheeled vehicle, which includes a vehicle body 20 and a two-wheeled vehicle transmission system 10 . The two-wheeled vehicle transmission system 10 is disposed on the vehicle body 20 .

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A two-wheeled vehicle transmission system, characterized in that: include: A transmission belt, wherein a plurality of belt teeth are arranged at intervals on the inner surface of the transmission belt along the axial direction, the belt teeth are of a V-shaped structure, and the two sides of the belt teeth are symmetrically distributed about the axis of the transmission belt, and a V-shaped meshing groove is formed between two adjacent belt teeth; At least two pulleys, each pulley comprising a pulley hub and a plurality of pulley teeth spaced apart along the circumference of the outer ring of the pulley hub and matingly meshing with the meshing groove.

2. The two-wheeled vehicle transmission system according to claim 1, characterized in that: The belt teeth include first belt teeth and second belt teeth, and the first belt teeth and the second belt teeth are symmetrically distributed about the transmission belt axis.

3. The two-wheeled vehicle transmission system according to claim 2, characterized in that: The first belt tooth axis and the second belt tooth axis form an angle of 18°-23° with the transmission belt axis.

4. The two-wheeled vehicle transmission system according to claim 1, characterized in that: The two sides of the engagement groove are symmetrically distributed about the axis of the transmission belt, and the depth of the engagement groove gradually deepens from the middle position to the two sides.

5. The two-wheeled vehicle transmission system according to claim 4, characterized in that: The engagement groove has a plurality of engagement planes along the axis direction of the transmission belt, and an angle is formed between two adjacent engagement planes to form an engagement edge.

6. The two-wheeled vehicle transmission system according to claim 1, characterized in that: The two sides of the pulley teeth are symmetrically distributed about the axis of the outer ring of the pulley hub.

7. The two-wheeled vehicle transmission system according to claim 6, characterized in that: The pulley teeth and the belt teeth have the same width.

8. The two-wheeled vehicle transmission system according to claim 1, characterized in that: The belt tooth surface is an outwardly convex arc structure.

9. The two-wheeled vehicle transmission system according to claim 3, characterized in that: There is a gap between the first belt teeth and the second belt teeth.

10. A two-wheeled vehicle, characterized in that: include: The main body of the vehicle; The two-wheeled vehicle transmission system according to any one of claims 1 to 9 is arranged on the vehicle body.

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