Low-noise triangular transmission belt

Abstract

The utility model discloses a low-noise triangular transmission belt, and belongs to the field of triangular transmission belts. Comprising an annular belt body, the belt body is composed of a first rubber layer, a core rope layer and a second rubber layer. The core rope layer is wrapped by the first rubber layer and the second rubber layer; a plurality of tooth parts which extend in the length direction of the belt and are arranged in parallel are formed on the lower surface of the second rubber layer, and grooves which are concave inwards are formed in the tooth parts. The low-noise triangular transmission belt has the beneficial effects that the power transmission efficiency is improved, and the noise of an engine is reduced.

Description

Technical Field

[0001] This application relates to the field of V-belts, and more particularly, to a low-noise V-belt. Background Art

[0002] Although the drive belts in the prior art have significantly reduced the noise of the engine, during the operation of the engine, the belt segments of the drive belt between the pulleys will generate certain natural vibrations; in addition, the reciprocating movement of the cylinder piston will cause certain torsional excitation of the engine itself; furthermore, when the drive belt is in operation, certain excitation will also be generated at the moment when the rubber teeth of the belt body engage with the tooth grooves of the pulley. When the torsional excitation frequency of the engine or the meshing excitation frequency of the drive belt is close to or coincides with the natural frequency of a certain belt segment of the drive belt, resonance will occur, the noise phenomenon will be significantly enhanced, the ride comfort of the vehicle will decrease, and it is extremely easy to cause the failure of the timing system and damage the engine. Therefore, there is an urgent need for a drive belt that can change the natural frequency of the drive belt, increase the gap from the pulley meshing frequency and the engine excitation frequency, eliminate the resonance phenomenon, and reduce the engine noise. Summary of the Utility Model

[0003] The content part of this application is used to briefly introduce the concepts, which will be described in detail in the following detailed implementation part. The content part of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0004] To solve the technical problems mentioned in the above background art part, some embodiments of this application provide a low-noise V-belt, including:

[0005] An annular belt body;

[0006] The belt body is composed of a first rubber layer, a core rope layer, and a second rubber layer; the core rope layer is wrapped by the first rubber layer and the second rubber layer therein;

[0007] A plurality of tooth portions extending along the length direction of the belt and arranged in parallel are formed on the lower surface of the second rubber layer, and grooves recessed inward are formed on the tooth portions.

[0008] In this application, the middle part of the bottom of the tooth portion is designed as a groove, which increases the force-bearing contact surface between the V-belt and the driving wheel. Its transmission principle is: relying on the frictional force generated after the force (rotation of the driving wheel) between it and the driving wheel to achieve power transmission. Increasing the force-bearing contact surface of the V-belt can increase the frictional force, that is, increase the transmission force, effectively reduce the power transmission loss, improve the power transmission efficiency, and thus reduce the engine noise of the drive belt.

[0009] Further, the contour of the groove is semicircular.

[0010] Further, the outer peripheral surface of the first rubber layer is distributed with convex portions that can strengthen the tensile force of the belt body.

[0011] Further, a first accommodation cavity is formed on the first rubber layer, and a connecting rod inserted into the first accommodation cavity is formed on the convex portion.

[0012] Further, a clamping ring is arranged on the connecting rod, and a clamping groove for clamping and cooperating with the clamping ring is formed on the first accommodation cavity.

[0013] Further, the core rope layer is made of aramid.

[0014] Further, the first rubber layer and the second rubber layer are ethylene propylene diene monomer rubber layers.

[0015] Further, the tooth portion has an inverted trapezoidal structure.

[0016] The beneficial effect of this application is: to provide a low-noise V-belt that improves the power transmission efficiency and reduces the engine noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application, making other features, purposes, and advantages of this application more obvious. The schematic embodiments and descriptions of the drawings of this application are used to explain this application and do not constitute an improper limitation of this application.

[0018] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and components are not necessarily drawn to scale.

[0019] In the drawings:

[0020] Figure 1 is the overall schematic diagram according to the embodiment of this application;

[0021] Figure 2 is the cross-sectional view of the embodiment;

[0022] Figure 3 is Figure 2 the enlarged view of part A of

[0023] Reference numerals:

[0024] 1, belt body; 2, first rubber layer; 3, core rope layer; 4, second rubber layer; 5, tooth portion; 6, groove; 7, convex portion; 8, first accommodation cavity; 9, connecting rod; 10, clamping ring; 11, clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0026] In addition, it should be noted that for ease of description, only parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0027] It should be noted that concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence relationship of the functions performed by these devices, modules or units.

[0028] It should be noted that the modifications of "one" and "plural" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly specified in the context, it should be understood as "one or more".

[0029] The present disclosure will be described in detail below with reference to the drawings and in combination with embodiments.

[0030] Referring to Figures 1-3 , a low-noise V-belt includes an annular belt body 1 that is wound around a pulley in a manner that its inner peripheral wall contacts the pulley to transmit power. The belt body 1 is composed of a first rubber layer 2, a core rope layer 3, and a second rubber layer 4; the first rubber layer 2 and the second rubber layer 4 are ethylene propylene diene monomer (EPDM) rubber layers, the core rope layer 3 is made of aramid, and the core rope layer 3 is wrapped by the EPDM rubber layers in a once-melted state of the first rubber layer 2 and the second rubber layer 4. Wherein, a plurality of tooth portions 5 extending in the length direction of the belt and arranged parallel to each other are formed on the lower surface of the second rubber layer 4. The tooth portions 5 are trapezoidal in reverse structure, and grooves 6 recessed inward are formed on the tooth portions 5. The contour of the grooves 6 is semicircular. Designing the middle part of the bottom of the reverse trapezoidal section of the tooth portion 5 into the shape of the semicircular groove 6 increases the force-bearing contact surface between the V-belt and the driving wheel. Its transmission principle is: relying on the frictional force generated after the force (the driving wheel rotates) between it and the driving wheel to achieve power transmission. Increasing the force-bearing contact surface of the V-belt can increase the frictional force, that is, increase the transmission force, effectively reduce the power transmission loss, improve the power transmission efficiency, and thus reduce the engine noise of the transmission belt.

[0031] Protrusions 7 are distributed on the outer peripheral surface of the first rubber layer 2, so as to strengthen the tensile force of the belt body 1.

[0032] A first accommodation cavity 8 is formed in the first rubber layer 2. A connecting rod 9 inserted into the first accommodation cavity 8 is formed in the convex part 7. A clamping ring 10 is arranged on the connecting rod 9, and a clamping groove 11 for clamping and cooperating with the clamping ring 10 is formed in the first accommodation cavity 8. Thereby, the installation stability is improved.

[0033] The above description is only some preferred embodiments of the present disclosure and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A low-noise V-belt, comprising: An annular belt body; It is characterized in that: The belt body is composed of a first rubber layer, a core rope layer, and a second rubber layer; the core rope layer is wrapped by the first rubber layer and the second rubber layer therein; On the lower surface of the second rubber layer, there are provided a plurality of tooth portions extending along the length direction of the belt and arranged parallel to each other, and grooves recessed inward are provided on the tooth portions.

2. The low-noise V-belt according to claim 1, characterized in that: The contour of the groove is semicircular.

3. The low-noise V-belt according to claim 1, characterized in that: On the outer peripheral surface of the first rubber layer, there are distributed convex portions capable of strengthening the tensile force of the belt body.

4. The low-noise V-belt according to claim 3, characterized in that: A first accommodation cavity is provided on the first rubber layer, and a connecting rod inserted into the first accommodation cavity is provided on the convex portion.

5. The low-noise V-belt according to claim 4, characterized in that: A clamping ring is provided on the connecting rod, and a clamping groove for clamping and mating with the clamping ring is provided on the first accommodation cavity.

6. The low-noise V-belt according to claim 1, characterized in that: The core rope layer is made of aramid.

7. The low-noise V-belt according to claim 1, characterized in that: The first rubber layer and the second rubber layer are ethylene propylene diene monomer rubber layers.

8. The low-noise V-belt according to claim 1, characterized in that: The tooth portion is an inverted trapezoidal structure.

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