Low-tension anti-jumping synchronous belt

Abstract

The utility model discloses a low tension anti-bounce synchronous belt, including tooth portion base body, back portion base body and main body base body, the main body base body includes carbon fiber cord unit and sizing material unit, the carbon fiber cord unit includes a plurality of carbon fiber tensile cord, the cord diameter of each carbon fiber tensile cord is 0.8-2.0 mm, and the sizing material unit includes a plurality of sizing material units. And / or the twist degree of each carbon fiber tensile cord is between 30 tpm and 80 tpm; the rubber material unit is formed by mixing at least two rubber materials of a nitrile rubber buna layer, a hydrogenated nitrile rubber buna layer, an ethylene propylene rubber layer, a chloroprene rubber layer and a natural rubber layer; the sizing material unit completely wraps the carbon fiber cord unit in the extending direction, so that the proportional relation between the load rate and the elongation of the synchronous belt is controlled to be 10000 N < 1%. The synchronous belt at least has the following advantages that the carbon fiber cord unit and the sizing material unit are combined for use, and the synchronous belt has the characteristic of low elongation under high load by utilizing the control of the cord diameter and the twist degree.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a low-tension anti-tooth-jumping synchronous belt. Background Art

[0002] Synchronous belts, also known as toothed belts, timing belts, and timing belts, are meshing type transmissions. Compared with chain and gear transmissions, they have the advantages of light weight, simple structure, no need for lubrication, and low noise. They are widely used in automobiles, office automation, industry and other fields.

[0003] With the acceleration of urbanization, the concept of urban leisure is becoming more and more popular. Cruise motorcycles represent a leisure and comfortable riding posture. In recent years, they have become increasingly popular in the domestic market and have been recognized by a large number of motorcycle enthusiasts. Due to the many shortcomings of traditional chain-driven cruise motorcycles, such as loud noise, oil pollution, and frequent maintenance, belt-driven cruise motorcycles came into being, quickly became popular in the domestic market, and are becoming increasingly popular. However, due to the large output torque and low frame strength of cruise vehicles, this requires that the transmission belt cannot jump teeth under extremely high loads and extremely low installation tension conditions. The existing synchronous belts cannot meet this technical requirement (the installation tension without jumping teeth is above 2500N, and the frame strength cannot withstand it). It is necessary to develop a synchronous belt with excellent anti-jumping performance under low installation tension conditions. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a low-tension anti-jump synchronous belt, which selects the combination of a carbon fiber cord unit and a rubber unit, and utilizes the control of wire diameter and twist to make the synchronous belt have the characteristic of low elongation under high load.

[0005] The utility model is realized by the following technical solutions:

[0006] A low-tension anti-jump synchronous belt comprises a tooth base, a back base, and a main body base located between the tooth base and the back base, wherein the tooth base, the main body base and the back base are arranged in a stacked manner.

[0007] The main body includes a carbon fiber cord unit and a rubber unit.

[0008] The carbon fiber cord unit comprises a plurality of carbon fiber tensile cords, wherein the wire diameter of each of the carbon fiber tensile cords is between 0.8 and 2.0 mm, and / or the twist of each of the carbon fiber tensile cords is between 30 tpm and 80 tpm;

[0009] The rubber material unit is composed of a mixture of at least two rubber materials selected from the group consisting of a nitrile rubber layer, a hydrogenated nitrile rubber layer, an ethylene propylene rubber layer, a chloroprene rubber layer, and a natural rubber layer;

[0010] The rubber unit completely wraps the carbon fiber cord unit in the extension direction, so that the proportional relationship between the load rate and the elongation rate of the synchronous belt is controlled to be 10000N<1%.

[0011] Furthermore, the sizing unit further includes a short fiber layer, and the short fiber layer includes one or more of nylon short fibers, polyester short fibers, PBO short fibers, glass fiber short fibers, and aramid short fibers.

[0012] Furthermore, one side of the main body substrate close to the tooth substrate protrudes outward to form a plurality of teeth, and the plurality of teeth are evenly distributed in the extension direction, and the tooth substrate is in contact with the teeth.

[0013] Furthermore, the carbon fiber rope unit is arranged close to one side of the tooth portion.

[0014] Furthermore, the tooth substrate is made of nylon canvas treated with PTFE, and the back substrate is made of nylon canvas.

[0015] Furthermore, an adhesive layer is provided between the tooth base and the back base and the main body base, and the tooth base and the back base are respectively bonded to two opposite surfaces of the main body base.

[0016] Furthermore, the surface of the tooth base is coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene.

[0017] Compared with the prior art, the advantages of the utility model are: the combination of carbon fiber rope units and rubber units is selected, and the wire diameter and twist are controlled so that the synchronous belt has the characteristics of low elongation under high load. Specifically, during the working process, taking the load force received by the synchronous belt as 10000N as an example, the ratio of the extended length of the synchronous belt after deformation to the length before deformation is controlled below 1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a structural cross-sectional view of an embodiment of the utility model;

[0020] Figure 3 A cross-sectional view of a carbon fiber tensile cord according to an embodiment of the present utility model;

[0021] Figure numerals: 1. tooth base; 2. back base; 3. rubber unit; 4. carbon fiber tensile cord; 5. tooth. DETAILED DESCRIPTION

[0022] The following is a further non-restrictive detailed description of the utility model technical solution in conjunction with the preferred embodiment and its accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limitations on the utility model.

[0023] like Figures 1 to 3 As shown, a low-tension anti-jumping synchronous belt is disclosed in the embodiment of the present application, which is mainly used in vehicle transmission equipment such as automobiles and motorcycles. The synchronous belt of the present application is used in motorcycles as an example, and it is required that it still has a low elongation requirement under high load to prevent the synchronous belt from jumping.

[0024] In this embodiment, the low-tension anti-jump synchronous belt includes a tooth portion 5 substrate 1, a back substrate 2, and a main body substrate located between the tooth portion 5 substrate 1 and the back substrate 2. The tooth portion 5 substrate 1, the main body substrate and the back substrate 2 are arranged in a stacked manner.

[0025] The main body includes a carbon fiber cord unit and a rubber unit 3,

[0026] The carbon fiber cord unit comprises a plurality of carbon fiber tensile cords 4, wherein the wire diameter of each of the carbon fiber tensile cords 4 is between 0.8 and 2.0 mm, and / or the twist of each of the carbon fiber tensile cords 4 is between 30 tpm and 80 tpm;

[0027] The rubber material unit 3 is composed of a mixture of at least two rubber materials selected from the group consisting of a nitrile rubber layer, a hydrogenated nitrile rubber layer, an ethylene propylene rubber layer, a chloroprene rubber layer, and a natural rubber layer;

[0028] The rubber unit 3 completely wraps the carbon fiber cord unit in the extension direction, so that the proportional relationship between the load rate and the elongation rate of the synchronous belt is controlled to be 10000N<1%.

[0029] Through the above-mentioned setting method, a combination of a carbon fiber rope unit and a rubber unit 3 is selected, and the wire diameter and twist are controlled so that the synchronous belt has the characteristic of low elongation under high load. Specifically, during the working process, taking the load force received by the synchronous belt as 10000N as an example, the ratio of the extended length of the synchronous belt after deformation to the length before deformation is controlled to be less than 1%.

[0030] In this embodiment, the rubber unit 3 further includes a short fiber layer, and the short fiber layer includes one or more of nylon short fibers, polyester short fibers, PBO short fibers, glass fiber short fibers, and aramid short fibers. In one embodiment, the rubber unit 3 is formed by mixing nylon short fibers, glass fiber short fibers, and aramid short fibers to make the material of the main body more mixed. During the use of multiple angles and multiple twists, it can always maintain good hardness and tensile properties to cope with the situation of sudden large loads.

[0031] In this embodiment, the main body substrate protrudes outwards on one side close to the tooth portion 5 substrate 1 to form a plurality of teeth 5, and the plurality of teeth 5 are evenly arranged in the extension direction, and the tooth portion 5 substrate 1 is in contact with the tooth portion 5. During operation, the tooth portion 5 needs to mesh, and the synchronous belt has a small elongation property under high load, so that the synchronous belt can always mesh with the transmission structure during multi-angle and multi-torsion use, thereby reducing the jumping phenomenon as much as possible and reducing the meshing noise.

[0032] It is also worth noting that the carbon fiber cord unit is arranged close to the tooth portion 5. During operation, the tooth portion 5 is subjected to more obvious force. The carbon fiber cord unit is designed close to the tooth portion 5 so that the deformation force of the tooth portion 5 is small while ensuring that the performance of the main matrix meets the requirements, thereby ensuring the effectiveness of the meshing.

[0033] In this embodiment, the tooth portion 5 base 1 is made of PTFE-treated nylon canvas, and the back base 2 is made of nylon canvas. An adhesive layer is provided between the tooth portion 5 base 1 and the back base 2 and the main body base, and the tooth portion 5 base 1 and the back base 2 are respectively bonded to two opposite surfaces of the main body base.

[0034] In this embodiment, the surface of the tooth portion 5 substrate 1 is also coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene. During use, the wear-resistant layer directly meshes with external components to protect the gear from wear.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A low-tension anti-tooth skipping synchronous belt, characterized in that: It comprises a tooth base, a back base, and a main body base located between the tooth base and the back base, wherein the tooth base, the main body base and the back base are arranged in a stacked manner. The main body includes a carbon fiber cord unit and a rubber unit. The carbon fiber cord unit comprises a plurality of carbon fiber tensile cords, wherein the wire diameter of each of the carbon fiber tensile cords is between 0.8 and 2.0 mm, and / or the twist of each of the carbon fiber tensile cords is between 30 tpm and 80 tpm; The rubber unit completely wraps the carbon fiber cord unit in an extending direction.

2. The low-tension anti-tooth skipping synchronous belt according to claim 1, characterized in that: The sizing unit also includes a short fiber layer, and the short fiber layer includes one of nylon short fibers, polyester short fibers, PBO short fibers, glass fiber short fibers, and aramid short fibers.

3. The low-tension anti-tooth skipping synchronous belt according to claim 1, characterized in that: A side of the main body substrate close to the tooth base protrudes outward to form a plurality of teeth, and the plurality of teeth are evenly distributed in the extension direction, and the tooth base is in contact with the teeth.

4. The low-tension anti-tooth skipping synchronous belt according to claim 3, characterized in that: The carbon fiber cord unit is arranged close to one side of the tooth portion.

5. The low-tension anti-tooth skipping synchronous belt according to claim 1, characterized in that: The tooth base is made of PTFE-treated nylon canvas, and the back base is made of nylon canvas.

6. The low-tension anti-tooth skipping synchronous belt according to claim 5, characterized in that: An adhesive layer is arranged between the tooth base, the back base and the main body base, and the tooth base and the back base are respectively bonded to two opposite surfaces of the main body base.

7. The low-tension anti-tooth skipping synchronous belt according to claim 6, characterized in that: The surface of the tooth base is also coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene.

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