Engine pulley

Abstract

The utility model provides a kind of engine pulley, belong to engine accessories field.It solves the problem of the limited contact area of existing V-type pulley and V-type groove bottom.This engine pulley, including the wheel body of integrally formed structure setting, wheel body has left edge and right edge, left edge right edge extends towards and cooperates, and form V-type groove for accommodating V-type belt on the circumferential outer surface of wheel body, located the groove bottom both sides of V-type groove are provided with arc convex for contact with belt, arc convex continuously extends along the circumferential direction of wheel body, installation hole is equipped at the center of wheel body, for installing the pulley to engine shaft, wherein, bolt compression amplitude plate is arranged around installation hole, for pulley is fixed by bolt on engine shaft.The utility model has the advantages of stable transmission, reduces vibration and noise.

Description

Technical Field

[0001] This utility model belongs to the field of engine parts, and relates to a pulley, and more particularly to an engine pulley. Background Technology

[0002] In engine transmission systems, V-belt pulleys are a widely used basic component that transmits power through the wedging effect between the belt and the sidewall of the pulley groove.

[0003] However, traditional V-belt pulleys typically have a flat or simple curved groove bottom design. This results in a limited contact area between the back of the belt and the groove bottom when the belt is tensioned, easily leading to stress concentration. This contact method not only accelerates wear on the back of the belt and shortens its service life, but also easily causes vibration and noise during transmission, affecting the smoothness of the transmission. Furthermore, under sudden load changes, poor contact between the belt and the groove bottom can easily lead to slippage, reducing transmission efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an engine pulley to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: an engine pulley, comprising a wheel body integrally formed, the wheel body having a left edge and a right edge, the left edge and the right edge extending towards each other and cooperating, and a V-shaped groove for accommodating a V-shaped belt is formed on the circumferential outer surface of the wheel body, characterized in that arc-shaped protrusions for contacting the belt are provided on both sides of the bottom of the V-shaped groove, the arc-shaped protrusions extending continuously along the circumferential direction of the wheel body; A mounting hole is provided at the center of the wheel body for mounting the pulley to the engine shaft; A bolt clamping plate is provided around the mounting hole to clamp and fix the pulley to the engine shaft with bolts.

[0006] In the aforementioned engine pulley, the arc-shaped protrusions on both sides of the bottom of the V-groove are arranged symmetrically with respect to the central plane of the V-groove.

[0007] In the aforementioned type of engine pulley, the cross-section of the arc-shaped protrusion is circular.

[0008] In the aforementioned engine pulley, the groove angle of the V-groove ranges from 34° to 38°.

[0009] In the aforementioned engine pulley, the bolt clamping plate is integrally formed with the pulley body, and the pulley body is made of ductile iron.

[0010] Compared with existing technologies, this engine pulley, by setting symmetrical arc-shaped protrusions on both sides of the bottom of its V-groove, forms an optimized contact and support with the back of the belt, which significantly improves the smoothness of transmission, reduces vibration and noise, and effectively improves the stress distribution in the contact area, thereby extending the service life of both the belt and the pulley itself. In addition, the one-piece molding structural design and the application of ductile iron material further ensure the overall strength, rigidity and reliability of the product, achieving comprehensive optimization of performance and durability. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the engine pulley.

[0012] In the diagram, 1 is the wheel body; 2 is the left edge; 3 is the right edge; 4 is the V-groove; 5 is the arc-shaped protrusion; 6 is the bolt clamping plate; and 7 is the mounting hole. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0014] like Figure 1 As shown, the engine pulley includes a pulley body 1 integrally formed. The pulley body 1 has a left edge 2 and a right edge 3, which extend towards each other and cooperate. A V-groove 4 for accommodating a V-belt is formed on the circumferential outer surface of the pulley body 1. Arc-shaped protrusions 5 for contacting the belt are provided on both sides of the bottom of the V-groove 4. The arc-shaped protrusions 5 extend continuously along the circumferential direction of the pulley body 1. A mounting hole 7 is provided at the center of the pulley body 1 for mounting the pulley to the engine shaft. A bolt clamping plate 6 is provided around the mounting hole 7 for clamping and fixing the pulley to the engine shaft with bolts.

[0015] The arc-shaped protrusions 5 on both sides of the bottom of the V-groove 4 are symmetrically arranged with respect to the central plane of the V-groove 4. The cross-section of the arc-shaped protrusions 5 is circular arc. The groove angle of the V-groove 4 ranges from 34° to 38°. The bolt clamping plate 6 is integrally formed with the wheel body 1, which is made of ductile iron.

[0016] When the V-belt is embedded in the V-groove 4 of the pulley, the two sides of the belt fit against the inclined sidewalls of the V-groove 4, forming a preliminary wedging effect, which is the form of traditional V-belt drives. The technical solution of this application provides continuously extending arc-shaped protrusions 5 on both sides of the bottom of the V-groove 4. When the belt is pressed into the bottom of the groove under tension, the corresponding part on its back side will contact these two symmetrical arc-shaped protrusions 5. This design transforms the traditional small-area contact into a smoother, more uniformly stress-distributed surface contact. The arc-shaped protrusions 5, as a smooth support and guide structure, not only transmit engine torque more effectively, but also provide buffering and guidance when the belt undergoes minor deformation or vibration due to load changes, ensuring a smoother and more continuous transmission process, thereby suppressing slippage and abnormal wear.

[0017] By setting symmetrical arc-shaped protrusions 5 on both sides of the bottom of its V-groove 4, it forms an optimized contact and support with the back of the belt, which significantly improves the smoothness of transmission, reduces vibration and noise, and effectively improves the stress distribution in the contact area, thereby extending the service life of the belt and pulley itself. In addition, the one-piece molded structural design and the application of ductile iron material further ensure the overall strength, rigidity and reliability of the product, achieving comprehensive optimization of performance and durability.

[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. An engine pulley, comprising a pulley body (1) integrally formed, the pulley body (1) having a left edge (2) and a right edge (3), the left edge (2) and the right edge (3) extending toward each other and engaging, and forming a V-groove (4) on the circumferential outer surface of the pulley body (1) for accommodating a V-belt, characterized in that, Arc-shaped protrusions (5) for contacting the belt are provided on both sides of the bottom of the V-groove (4), and the arc-shaped protrusions (5) extend continuously along the circumferential direction of the wheel body (1). A mounting hole (7) is provided at the center of the wheel body (1) for mounting the pulley to the engine shaft; Among them, a bolt clamping plate (6) is provided around the mounting hole (7) for clamping and fixing the pulley to the engine shaft by bolts.

2. The engine pulley according to claim 1, characterized in that, The arc-shaped protrusions (5) on both sides of the bottom of the V-groove (4) are arranged symmetrically with respect to the central plane of the V-groove (4).

3. An engine pulley according to claim 1, characterized in that, The cross-section of the arc-shaped protrusion (5) is circular arc-shaped.

4. An engine pulley according to claim 1, characterized in that, The groove angle of the V-groove (4) ranges from 34° to 38°.

5. An engine pulley according to claim 1, characterized in that, The bolt clamping plate (6) is integrally formed with the wheel body (1), and the wheel body (1) is made of ductile iron.

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