Elastic poly V-belt suitable for low-power driving

Abstract

The utility model discloses an elastic poly V-belt suitable for low-power driving, which comprises a first rubber layer, a second rubber layer, a third rubber layer and a tensile cord layer, and the first rubber layer, the second rubber layer and the third rubber layer are sequentially stacked; the tensile cord layer is wrapped in the second rubber layer, and the tensile cord layer comprises a plurality of tensile cords; the surface, deviating from the second rubber layer, of the third rubber layer sinks inwards to form a plurality of V-shaped groove bodies; the third rubber layer comprises a body part and wedge-shaped parts, the side walls of every two adjacent wedge-shaped parts form a V-shaped groove body, the projections of the tensile ropes in the stacking direction fall on the corresponding wedge-shaped parts, and one wedge-shaped part can bear the projections of 2-3 tensile ropes. The elastic poly V-belt at least has the following advantages that the elastic poly V-belt is only composed of a plurality of mixed rubber combined tensile cord layers, and the proportional relation is reasonably designed, so that the elastic poly V-belt has lower modulus and is suitable for low-power accessory driving.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to an elastic multi-V belt suitable for low-power driving. Background Art

[0002] In the development of the automobile industry, the accessory system of automobile engines has gradually evolved from the initial multi-V belt drive system to the use of multi-V belt drive. A single multi-V belt can drive multiple accessories at the same time, and the multi-V belt has better flexibility and aging performance, which not only greatly saves space at the front end of the car, but also increases the service life of the belt.

[0003] With the innovation of automobile technology, traditional fuel vehicles are gradually being replaced by hybrid electric vehicles (HEV), pure electric vehicles (EV / BEV, including solar vehicles), fuel cell electric vehicles (FCEV), and other new energy vehicles (such as supercapacitors, flywheels and other high-efficiency energy storage devices). There is no need to drive multiple accessory systems through belts anymore, and belts are only used to drive low-power accessories. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an elastic multi-V belt suitable for low-power drive, which is composed only of multiple mixed rubber combined with tensile cord layers, and through reasonable design of the proportional relationship, the elastic multi-V belt has a lower modulus and is suitable for low-power accessory drive.

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

[0006] An elastic multi-V belt suitable for low-power drive comprises a first rubber layer, a second rubber layer, a third rubber layer and a tensile cord layer.

[0007] The first rubber layer, the second rubber layer and the third rubber layer are stacked in sequence, and the second rubber layer includes an adhesive portion capable of respectively bonding the first rubber layer and the third rubber layer;

[0008] The tensile cord layer is wrapped in the second rubber layer, wherein the tensile cord layer includes a plurality of tensile cords, and the plurality of tensile cords are evenly spaced along a cross section perpendicular to the stacking direction;

[0009] The surface of the third rubber layer facing away from the second rubber layer is inwardly concave to form a plurality of V-shaped grooves;

[0010] The third rubber layer includes a main body and a wedge-shaped portion, the side walls of two adjacent wedge-shaped portions constitute a V-shaped groove, the projection of the tensile cord in the stacking direction falls on the corresponding wedge-shaped portion, and one wedge-shaped portion can bear the projection of 2-3 tensile cords.

[0011] Furthermore, the bottom of the V-shaped groove body is connected by an arc transition, wherein the opening angle of the V-shaped groove body is between 37-43°.

[0012] Furthermore, the ratio of the thickness of the first rubber layer in the stacking direction to the thickness of the tensile cord layer is between 0.6 and 0.9.

[0013] Furthermore, the ratio of the thickness of the main body of the third rubber layer in the stacking direction to the thickness of the tensile cord layer is between 0.5 and 0.8.

[0014] Furthermore, the ratio of the thickness of the main body portion to that of the wedge-shaped portion in the stacking direction is between 0.2 and 0.4.

[0015] Furthermore, the third rubber layer is composed of an EPDM rubber layer.

[0016] Furthermore, the tensile cord layer is made of PA66 nylon.

[0017] Compared with the prior art, the advantages of the utility model are: by utilizing the proportional control between the extension width of the wedge-shaped portion and the tensile cord, combined with the thickness design in the stacking direction, the elastic multi-V belt of the present application can have a skeleton with better hardness. At the same time, by utilizing a mixed design of three layers of rubber and utilizing elastic properties, the elastic multi-V belt can be ensured to have a lower elastic modulus, thereby being suitable for driving low-power accessories. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a working schematic diagram of an embodiment of the utility model;

[0020] Figure numerals: 1, first rubber layer; 2, second rubber layer; 3, tensile cord; 4, V-shaped groove; 5, main body; 6, wedge-shaped part. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1 and Figure 2 As shown, an elastic multi-V belt suitable for low-power drive is disclosed in an embodiment of the present application. The elastic multi-V belt is preferably used in new energy vehicles, such as the operation of a water pump drive system. The design thereof is composed of only three layers of mixed rubber combined with tensile cords, and through a reasonable design of the proportional relationship, the elastic multi-V belt has a lower modulus, which is suitable for low-power accessory drives.

[0023] Specifically, the elastic multi-V belt mainly includes a first rubber layer 1, a second rubber layer 2, a third rubber layer and a tensile cord 3 layer.

[0024] The first rubber layer 1, the second rubber layer 2 and the third rubber layer are stacked in sequence, and the second rubber layer 2 includes an adhesive portion capable of respectively bonding the first rubber layer 1 and the third rubber layer;

[0025] The tensile cord 3 layer is wrapped in the second rubber layer 2, wherein the tensile cord 3 layer includes a plurality of tensile cords 3, and the plurality of tensile cords 3 are evenly spaced along a cross section perpendicular to the stacking direction;

[0026] The surface of the third rubber layer facing away from the second rubber layer 2 is inwardly concave to form a plurality of V-shaped grooves 4;

[0027] The third rubber layer includes a main body portion 5 and a wedge-shaped portion 6. The side walls of two adjacent wedge-shaped portions 6 form a V-shaped groove body 4. The projection of the tensile cord 3 in the stacking direction falls on the corresponding wedge-shaped portion 6. One wedge-shaped portion 6 can bear the projections of 2-3 tensile cords 3.

[0028] Through the above-mentioned design, firstly, the elastic multi-V belt is composed of only a plurality of mixed rubbers combined with three layers of tensile cords, and by reasonably designing the proportional relationship, the elastic multi-V belt has a lower modulus, which is suitable for driving low-power accessories; in addition, by utilizing the proportional control between the extension width of the wedge-shaped portion 6 and the tensile cord 3, combined with the thickness design in the stacking direction, the elastic multi-V belt of the present application can have a skeleton with better hardness. At the same time, by utilizing the mixed design of three layers of rubber and the elastic properties, the elastic multi-V belt can be ensured to have a lower elastic modulus, thereby being suitable for driving low-power accessories.

[0029] In this embodiment, the bottom of the V-shaped groove body 4 is connected by an arc transition, wherein the opening angle of the V-shaped groove body 4 is between 37-43°. On the one hand, it is convenient for mold forming and mold pouring, and on the other hand, the wedge-shaped portion 6 will deform during operation, and the arc transition connection can avoid stress concentration.

[0030] In this embodiment, the ratio of the thickness of the first rubber layer 1 in the stacking direction to the thickness of the tensile cord 3 layer is between 0.6-0.9. The ratio of the thickness of the main body 5 of the third rubber layer in the stacking direction to the thickness of the tensile cord 3 layer is between 0.5-0.8. The tensile cord 3 layer is used as a skeleton and needs to provide good tensile strength. Preferably, the tensile cord 3 layer is made of PA66 nylon material. Secondly, the second rubber layer 2 wraps the tensile cord 3 layer, and the first rubber layer 1 and the main body 5 of the third rubber layer auxiliary wrap the tensile cord 3 layer, which can reflect the base performance of the elastic multi-V belt of this application.

[0031] In this embodiment, the ratio of the thickness of the main body 5 and the wedge-shaped portion 6 in the stacking direction is between 0.2-0.4. During operation, the wedge-shaped portion 6 serves as a friction wedging portion for bearing the transmission friction force. The design of the opening angle of the V-shaped groove body 4 between 37-43° can ensure that the wedge-shaped portion 6 is in close contact with the pulley groove during the transmission process, thereby ensuring the stability of the transmission friction force. Preferably, the third rubber layer is composed of an EPDM rubber layer. On the one hand, EPDM is mixed with other materials in a certain proportion to improve the properties of wear resistance, aging resistance, high and low temperature resistance, etc. On the other hand, the wedge-shaped portion 6 will be stretched and twisted during the force-bearing process, and the elasticity of the rubber can better bear multi-directional forces.

[0032] 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. An elastic multi-V belt suitable for low-power drive, characterized in that: It includes a first rubber layer, a second rubber layer, a third rubber layer and a tensile cord layer, The first rubber layer, the second rubber layer and the third rubber layer are stacked in sequence, and the second rubber layer includes an adhesive portion capable of respectively bonding the first rubber layer and the third rubber layer; The tensile cord layer is wrapped in the second rubber layer, wherein the tensile cord layer includes a plurality of tensile cords, and the plurality of tensile cords are evenly spaced along a cross section perpendicular to the stacking direction; The surface of the third rubber layer facing away from the second rubber layer is inwardly concave to form a plurality of V-shaped grooves; The third rubber layer includes a main body and a wedge-shaped portion, the side walls of two adjacent wedge-shaped portions constitute a V-shaped groove, the projection of the tensile cord in the stacking direction falls on the corresponding wedge-shaped portion, and one wedge-shaped portion can bear the projection of 2-3 tensile cords.

2. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The bottom of the V-shaped groove body is connected by an arc transition, wherein the opening angle of the V-shaped groove body is between 37° and 43°.

3. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The ratio of the thickness of the first rubber layer in the stacking direction to the thickness of the tensile cord layer is between 0.6 and 0.

9.

4. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The ratio of the thickness of the main body of the third rubber layer in the stacking direction to the thickness of the tensile cord layer is between 0.5 and 0.

8.

5. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The thickness ratio of the main body portion and the wedge-shaped portion in the stacking direction is between 0.2 and 0.

4.

6. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The third rubber layer is composed of an ethylene-propylene rubber layer.

7. The elastic multi-V belt suitable for low-power drive according to claim 1, characterized in that: The tensile cord layer is made of PA66 nylon.

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