High-load-resistant synchronous belt

Abstract

The utility model discloses a high load resistant synchronous belt which comprises a first canvas layer, a second canvas layer, a main body layer and a tensile cord layer, and the first canvas layer and the second canvas layer are respectively arranged on two opposite surfaces of the main body layer; the main body layer is formed by laminating at least two 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 main body layer further comprises a short fiber layer, and the short fiber layer is formed by combining at least two of a nylon short fiber layer, a polyester short fiber layer, a glass fiber short fiber layer and an aramid short fiber layer; the tensile cord layer is wrapped in the main body layer, the tensile cord layer comprises a plurality of tensile cords, and the tooth side hardness of the synchronous belt can reach 55-70D Shore. The synchronous belt at least has the advantages that the main body layer, the short fiber layer and the tensile cord layer are combined for use, so that the synchronous belt has the characteristics of high strength and high tensile resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a high-load resistant 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 technological upgrading of various industries, the requirements for synchronous belts are becoming more and more stringent. For example, when the load transmitted by the automobile engine remains unchanged, the synchronous belt is required to have a smaller width, or in the motorcycle transmission system, the instantaneous load increases and the synchronous belt has to have better strength. This has brought higher challenges to the performance of the synchronous belt. Under such working conditions, the existing synchronous belt will fail due to early tooth shearing or belt breakage, and cannot meet the technical requirements. Therefore, it is necessary to develop a synchronous belt that can withstand high loads. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-strength insulating synchronous belt, which uses a main body layer, a short fiber layer and a tensile cord layer in combination, so that the synchronous belt has the characteristics of high strength and high tensile resistance.

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

[0006] A high-load resistant synchronous belt, used in vehicle transmission equipment, comprises a first canvas layer, a second canvas layer, a main body layer, and a tensile cord layer.

[0007] The first canvas layer and the second canvas layer are respectively arranged on two opposite surfaces of the main body layer and are fixed to the main body layer;

[0008] The main body layer is composed of at least two layers 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.

[0009] The main body layer also includes a short fiber layer, and the short fiber layer is formed by a combination of at least two of a nylon short fiber layer, a polyester short fiber layer, a glass fiber short fiber layer, and an aramid short fiber layer;

[0010] The anti-tension cord layer is wrapped in the main body layer, and the anti-tension cord layer includes a plurality of anti-tension cords, and the plurality of anti-tension cords are evenly distributed along the cross section of the length direction of the synchronous belt;

[0011] The tooth side hardness of the synchronous belt can reach 55-70D Shore.

[0012] Furthermore, a surface of the main body layer close to the second canvas layer is protruded outward to form a tooth portion, and the second canvas layer is adaptively fitted on the surface of the main body layer.

[0013] Furthermore, in the stacking direction of the first canvas layer and the second canvas layer, the ratio of the thickness of the tooth portion to the thickness of the rest of the main body layer is between 1.05 and 1.15.

[0014] Furthermore, the tensile cord layer is arranged close to the second canvas layer.

[0015] Furthermore, in the stacking direction of the first canvas layer and the second canvas layer, the ratio of the thickness of the tensile cord layer to the main body layer excluding the tooth layer is between 0.5-0.55.

[0016] Furthermore, an adhesive layer is provided between the first canvas layer and the main body layer, and between the second canvas layer and the main body layer, and the first canvas layer and the second canvas layer are respectively bonded to two opposite surfaces of the main body layer.

[0017] Furthermore, the tensile cord layer is made of carbon fiber material.

[0018] Furthermore, the surface of the second canvas layer is coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene.

[0019] Compared with the prior art, the advantages of the utility model are: the combination of the main layer, the short fiber layer and the tensile cord layer is used to make the synchronous belt have the characteristics of high strength and high tensile resistance, wherein the tooth side hardness of the synchronous belt can reach 55-70D Shore, so as to have the advantages of coping with high tooth shearing capacity; in addition, the main layer and the short fiber layer are more mixed, and during the use of multiple angles and multiple twists, it can always maintain good hardness and tensile properties to cope with situations such as sudden application of large loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 It is a structural cross-sectional view of an embodiment of the utility model;

[0022] Figure numerals: 1. first canvas layer; 2. second canvas layer; 3. main body layer; 4. tensile cord layer; 5. tooth portion. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1 and Figure 2 As shown, a high-load resistant synchronous belt is disclosed in an embodiment of the present application. The high-load resistant synchronous belt is mainly used in vehicle transmission equipment such as automobiles and motorcycles to meet the requirements of high strength and high tensile resistance of the synchronous belt during use, and reduce the probability of risks such as early tooth shearing or belt breakage failure.

[0025] Specifically, the synchronous belt mainly includes a first canvas layer 1, a second canvas layer 2, a main body layer 3, and a tensile cord layer 4, wherein the first canvas layer 1 and the second canvas layer 2 are respectively arranged on two opposite surfaces of the main body layer 3, and are fixedly arranged with the main body layer 3;

[0026] The main body layer 3 is composed of at least two layers 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.

[0027] The main body layer 3 also includes a short fiber layer, which is formed by a combination of at least two of a nylon short fiber layer, a polyester short fiber layer, a glass fiber short fiber layer, and an aramid short fiber layer;

[0028] The anti-tensile cord layer 4 is wrapped in the main body layer 3 , and the anti-tensile cord layer 4 includes a plurality of anti-tensile cords, and the plurality of anti-tensile cords are evenly distributed along the cross section of the length direction of the synchronous belt.

[0029] Through the above-mentioned setting method, the main layer 3, the short fiber layer and the tensile cord layer 4 are used in combination, so that the synchronous belt has the characteristics of high strength and high tensile resistance, wherein the tooth side hardness of the synchronous belt can reach 55-70D Shore, so as to have the advantages of coping with high tooth shearing capacity, etc.

[0030] In this embodiment, the main body layer 3 is preferably composed of a nitrile rubber layer, a hydrogenated nitrile rubber layer, and an ethylene-propylene rubber layer, wherein the nitrile rubber layer is arranged close to the first canvas layer 1, the ethylene-propylene rubber layer is arranged close to the second canvas layer 2, and the hydrogenated nitrile rubber layer is arranged between the two. The above arrangement makes the main body layer 3 more mixed, and it can always maintain good hardness and tensile properties during multi-angle and multi-twisting use to cope with situations such as sudden large loads.

[0031] In this embodiment, the surface of the main body layer 3 close to the second canvas layer 2 is protruded outward to form a tooth portion 5, and the second canvas layer 2 is adaptively fitted on the surface of the main body layer 3. In the stacking direction of the first canvas layer 1 and the second canvas layer 2, the ratio of the thickness of the tooth portion 5 to the thickness of the rest of the main body layer 3 is between 1.05-1.15. During operation, the tooth portion 5 needs to engage, and the above-mentioned proportion design enables the synchronous belt to always engage with the transmission structure during multi-angle and multi-torsion use, thereby reducing the jitter phenomenon as much as possible to reduce the engagement noise.

[0032] In this embodiment, the tensile cord layer 4 is arranged close to the second canvas layer 2. In the stacking direction of the first canvas layer 1 and the second canvas layer 2, the ratio of the thickness of the tensile cord layer 4 to the main body layer 3 excluding the tooth portion 5 layer is between 0.5-0.55. During operation, the tooth portion 5 is subjected to more obvious force. The tensile cord layer 4 is designed close to the tooth portion 5, and the thickness ratio is designed so that it can ensure that the deformation force of the tooth portion 5 is small while ensuring that the performance of the main body layer 3 meets the conditions, thereby ensuring the effectiveness of the meshing. Preferably, the tensile cord layer 4 is made of carbon fiber material.

[0033] In this embodiment, a glue layer is provided between the first canvas layer 1 and the main body layer 3, and between the second canvas layer 2 and the main body layer 3, and the first canvas layer 1 and the second canvas layer 2 are respectively bonded to two opposite surfaces of the main body layer 3. The first canvas layer 1 and the second canvas layer 2 are both woven from nylon threads and / or aramid threads, and the woven nylon threads and / or aramid threads are also dipped in glue, that is, the woven first canvas layer 1 and the second canvas layer 2 are fixed into shape by glue.

[0034] In this embodiment, the surface of the second canvas layer 2 is also coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene. During use, the wear-resistant layer directly engages with the external components to protect the second canvas layer 2 from being worn.

[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 high-load resistant synchronous belt, used in vehicle transmission equipment, characterized in that: It includes a first canvas layer, a second canvas layer, a main body layer, and a tensile cord layer. The first canvas layer and the second canvas layer are respectively arranged on two opposite surfaces of the main body layer and are fixed to the main body layer; The main body layer is composed of at least two layers 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. The main body layer also includes a short fiber layer, and the short fiber layer is formed by a combination of at least two of a nylon short fiber layer, a polyester short fiber layer, a glass fiber short fiber layer, and an aramid short fiber layer; The anti-tensile cord layer is wrapped in the main body layer, and the anti-tensile cord layer includes a plurality of anti-tensile cords, and the plurality of anti-tensile cords are evenly distributed along the cross section of the length direction of the synchronous belt.

2. The high-load resistant synchronous belt according to claim 1, characterized in that: The surface of the main body layer close to the second canvas layer is protruded outward to form a tooth portion, and the second canvas layer is adaptively fitted on the surface of the main body layer.

3. The high-load resistant synchronous belt according to claim 2, characterized in that: In the stacking direction of the first canvas layer and the second canvas layer, the ratio of the thickness of the tooth portion to the thickness of the rest of the main body layer is between 1.05 and 1.

15.

4. The high-load resistant synchronous belt according to claim 1, characterized in that: The tensile cord layer is arranged close to the second canvas layer.

5. The high-load resistant synchronous belt according to claim 4, characterized in that: In the stacking direction of the first canvas layer and the second canvas layer, the ratio of the thickness of the tensile cord layer to the thickness of the main body layer excluding the tooth layer is between 0.5-0.

55.

6. The high-load resistant synchronous belt according to claim 1, characterized in that: An adhesive layer is provided between the first canvas layer and the main body layer, and between the second canvas layer and the main body layer. The first canvas layer and the second canvas layer are respectively bonded to two opposite surfaces of the main body layer.

7. The high-load resistant synchronous belt according to claim 1, characterized in that: The tensile cord layer is made of carbon fiber material.

8. The high-load resistant synchronous belt according to claim 1, characterized in that: The surface of the second canvas layer is also coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene.

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