Rubber damping belt pulley

Abstract

The utility model discloses a rubber vibration reduction belt pulley, belongs to the technical field of engines, and solves the problems that a common rubber vibration reduction belt pulley is poor in heat dissipation effect, and the use performance and the service life of the rubber vibration reduction belt pulley are affected. The rubber vibration reduction belt pulley comprises a belt pulley inner ring and a belt pulley outer ring, the belt pulley inner ring is installed in the belt pulley outer ring, a rubber ring is arranged between the belt pulley inner ring and the belt pulley outer ring, a belt groove is formed in the circumferential face of the outer circle of the belt pulley outer ring, and a plurality of first heat dissipation holes are formed in the portion, in the belt groove, of the belt pulley outer ring. The multiple first heat dissipation holes are formed in the bottom of the belt groove at equal intervals, multiple second heat dissipation holes which are axially formed are formed in the positions, below the first heat dissipation holes, of the outer ring of the belt wheel, and the multiple second heat dissipation holes communicate with the multiple first heat dissipation holes in a one-to-one correspondence mode. According to the rubber vibration reduction belt pulley, the service life of the rubber vibration reduction belt pulley is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to a rubber vibration damping pulley. Background Technology

[0002] The pulley at the front of the engine is typically used to drive the water pump, generator, or compressor. The torsional vibrations generated during engine ignition and combustion are reduced by the damper pulley. However, these torsional vibrations are also transmitted to the pulley, affecting the belt's operational stability and lifespan. During the process of reducing torsional vibrations, the rubber in the damper generates heat. Rubber materials are quite sensitive to temperature; excessively high temperatures can lead to a decline in rubber performance, such as reduced elasticity, increased hardness, and shortened fatigue life, thus affecting the damping effect and lifespan of the damper.

[0003] Most common rubber vibration dampers do not adequately consider heat dissipation, which severely affects their performance and reliability under high-temperature or high-load conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a rubber vibration damping pulley, which improves the heat dissipation effect of the rubber vibration damping pulley, slows down the aging rate of the rubber ring, and thus improves the service life of the rubber vibration damping pulley.

[0005] The technical solution of this utility model is as follows: a rubber vibration damping pulley includes an inner pulley ring and an outer pulley ring. The inner pulley ring is installed inside the outer pulley ring. A rubber ring is provided between the inner pulley ring and the outer pulley ring. A belt groove is provided on the circumferential surface of the outer pulley ring. A plurality of first heat dissipation holes are provided on the outer pulley ring inside the belt groove. The plurality of first heat dissipation holes are arranged at equal intervals at the bottom of the belt groove. A plurality of axially arranged second heat dissipation holes are provided on the outer pulley ring below the first heat dissipation holes. The plurality of second heat dissipation holes are connected to the plurality of first heat dissipation holes one by one. An annular groove is provided on the sidewalls on both sides of the inner pulley ring. A plurality of inclined heat dissipation fins are provided on the sidewall of one of the annular grooves. The plurality of heat dissipation fins are arranged circumferentially on the inner pulley ring.

[0006] As a further improvement, the tilt angle α of the heat sink is 150°-155°.

[0007] Furthermore, the outer wall of the inner ring of the pulley is provided with a plurality of first protrusions arranged at equal intervals, the inner wall of the rubber ring is provided with a plurality of first grooves corresponding to the first protrusions, the outer wall of the rubber ring is provided with a plurality of second protrusions arranged at equal intervals, and the inner wall of the outer ring of the pulley is provided with a plurality of second grooves corresponding to the second protrusions.

[0008] Furthermore, the inner ring of the pulley in the annular groove is provided with a plurality of weight-reducing holes, which are arranged circumferentially on the inner ring of the pulley. The weight-reducing holes axially penetrate the inner ring of the pulley and connect the two annular grooves.

[0009] Furthermore, a removable heat insulation plate is provided on the side of the outer ring of the pulley away from the heat sink, and the heat insulation plate is provided with a through hole, the diameter of which is smaller than the diameter of the annular groove.

[0010] Furthermore, at least two limiting posts are provided on the side of the heat insulation plate, and the limiting posts are movably inserted into the second heat dissipation hole.

[0011] Beneficial effects

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. The present invention relates to a rubber vibration damping pulley, which is connected to a first heat dissipation hole and a second heat dissipation hole, which can dissipate the heat generated by friction between the belt and the belt groove, reduce the overall temperature of the belt and pulley, thereby slowing down the aging rate of the rubber ring and thus improving its service life.

[0014] 2. The present invention relates to a rubber vibration damping pulley, wherein the pulley has multiple heat dissipation fins arranged in a circular pattern on one side of the inner ring of the pulley. When the pulley rotates, the heat dissipation fins on one side of the pulley rotate with it, forming an airflow, which in turn carries away some of the heat generated by the operation of the pulley, thereby further improving the heat dissipation effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a side view sectional structural diagram of the present invention;

[0017] Figure 3 This is an enlarged schematic diagram of the structure of the outer ring of the pulley in this utility model;

[0018] Figure 4 This is an enlarged structural diagram of the rubber ring in this utility model;

[0019] Figure 5 This is an enlarged structural diagram of the inner ring of the pulley in this utility model;

[0020] Figure 6 This is a schematic diagram of the main structure of the heat insulation plate in this utility model.

[0021] Wherein: 1-inner ring of pulley, 2-outer ring of pulley, 3-rubber ring, 4-belt groove, 5-first heat dissipation hole, 6-second heat dissipation hole, 7-annular groove, 8-heat sink, 9-first protrusion, 10-first slot, 11-second protrusion, 12-second slot, 13-weight reduction hole, 14-heat insulation plate, 15-through hole, 16-limiting post. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0023] See Figure 1-6 A rubber vibration damping pulley includes an inner pulley ring 1 and an outer pulley ring 2. The inner pulley ring 1 is installed inside the outer pulley ring 2. A rubber ring 3 is provided between the inner pulley ring 1 and the outer pulley ring 2. A belt groove 4 is provided on the circumferential surface of the outer pulley ring 2. The outer pulley ring 2 inside the belt groove 4 has a plurality of first heat dissipation holes 5. The plurality of first heat dissipation holes 5 are arranged at equal intervals at the bottom of the belt groove 4. The outer pulley ring 2 below the first heat dissipation holes 5 has a plurality of axially arranged second heat dissipation holes 6. The plurality of second heat dissipation holes 6 are connected to the plurality of first heat dissipation holes 5 one-to-one. The second heat dissipation holes 6 axially penetrate both sides of the outer pulley ring 2, and the bottom of the first heat dissipation holes 5 is connected to the first heat dissipation holes 5. The heat generated by the rotation of the pulley and friction between the belt and the pulley in the belt groove 4 can be quickly discharged to the outside, reducing the surface temperature of the belt and the outer ring 2 of the pulley. It can also reduce the heat transfer from the outer ring 2 of the pulley to the rubber ring 3, slow down the aging of the rubber ring 3, and thus extend the service life of the rubber ring 3. Both sides of the inner ring 1 of the pulley are provided with annular grooves 7. On one side of the annular groove 7, there are multiple inclined heat sinks 8. The multiple heat sinks 8 are arranged in a circle on the inner ring 1 of the pulley. When the pulley rotates, the heat sinks 8 on one side of the pulley rotate with it, forming airflow, which carries away some of the heat generated by the operation of the pulley.

[0024] When assembling the rubber vibration damping pulley, first align the first groove 10 and the second protrusion 11 on the rubber ring 3 with the first protrusion 9 on the inner ring 1 and the second groove 12 on the outer ring 12 of the pulley, respectively. Then, press the rubber ring 3 between the inner ring 1 and the outer ring 2 of the pulley. The engagement between the rubber ring 3 and the inner ring 1 and outer ring 2 of the pulley improves the firmness of the connection between the rubber ring 3 and the inner ring 1 and outer ring 2 of the pulley, thereby improving the firmness of the rubber vibration damping pulley and ensuring safe and efficient use. During the operation of the pulley, the first heat dissipation hole 5 and the second heat dissipation hole 6 are connected, which can dissipate the heat generated by the friction between the belt and the belt groove 4, reduce the temperature of the belt and the pulley as a whole, thereby slowing down the aging rate of the rubber ring 3 and improving its service life.

[0025] In this embodiment, the tilt angle α of the heat sink 8 is 150°-155°. When the pulley rotates, the heat sink 8 located on one side of the pulley rotates with it, forming airflow and achieving the effect of heat dissipation. If the tilt angle of the heat sink is too small, it will affect its heat dissipation effect, and if the tilt angle of the heat sink is too large, it will cause wind noise.

[0026] In this embodiment, the outer wall of the inner ring 1 of the pulley is provided with a plurality of first protrusions 9 arranged at equal intervals, the inner wall of the rubber ring 3 is provided with a plurality of first grooves 10 corresponding to the first protrusions 9, the outer wall of the rubber ring 3 is provided with a plurality of second protrusions 11 arranged at equal intervals, and the inner wall of the outer ring 2 of the pulley is provided with a plurality of second grooves 12 corresponding to the second protrusions 11. By using the engagement of the first protrusions 9 with the first grooves 10 and the second protrusions 11 with the second grooves 12, the firmness of the connection between the rubber ring 3 and the inner ring 1 and the outer ring 3 of the pulley is strengthened, and at the same time, the relative rotation between the inner ring 1, the rubber ring 3 and the outer ring 2 of the pulley is avoided during rotation.

[0027] Preferably, the second heat dissipation hole 6 on the outer ring 2 of the pulley is staggered with the second slot 12, which improves the heat dissipation effect and the overall stability of the pulley without affecting the overall structural strength of the outer ring 2 of the pulley.

[0028] Preferably, the first groove 10 and the second protrusion 11 on the rubber ring 3 are staggered to ensure the vibration reduction effect and service life of the rubber ring 3.

[0029] In this embodiment, the inner ring 1 of the pulley in the annular groove 7 is provided with a plurality of weight-reducing holes 13. The plurality of weight-reducing holes 13 are arranged in a circle on the inner ring 1 of the pulley. The weight-reducing holes 13 penetrate the inner ring 1 of the pulley axially and connect the two annular grooves 7. The weight-reducing holes 13 can reduce the overall weight of the pulley, and during the surface heat treatment of the pulley, they help to reduce the deformation that may occur during the treatment process, thereby eliminating some internal stress. At the same time, the weight-reducing holes 13 can also play a role in isolating vibration, which helps to reduce the noise generated by the pulley during operation.

[0030] In this embodiment, a removable heat insulation plate 14 is provided on the side of the outer ring 2 of the pulley away from the heat sink 8. When the pulley is installed on the engine, the heat insulation plate 14 is located between the engine and the pulley to reduce the heat loss of the engine. The heat insulation plate 14 is connected to the outer ring 2 of the pulley by bolts, which facilitates the maintenance and upkeep of the heat insulation plate 14. The heat insulation plate 14 is provided with a through hole 15. The diameter of the through hole 15 is smaller than the diameter of the annular groove 7. When the pulley rotates, gas can flow through the through hole 15 and the weight reduction hole 13, thereby airflow and carrying away some heat.

[0031] In this embodiment, at least two limiting posts 16 are provided on the side of the heat insulation plate 14. The limiting posts 16 are movably inserted into the second heat dissipation hole 6. The heat insulation plate 14 is cylindrical, and the diameter of the heat insulation plate 14 is adapted to the diameter of the pulley. When installing the heat insulation plate 14, it can be quickly positioned by inserting the limiting posts 16 into the second heat dissipation hole 6, thereby improving the efficiency of installing the heat insulation plate 14. At the same time, it can prevent the heat insulation plate 14 from rotating relative to the pulley during the operation of the pulley.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model, and these will not affect the implementation effect of the present utility model or the practicality of the patent.

Claims

1. A rubber vibration damping pulley, characterized in that, The system includes an inner ring (1) and an outer ring (2) of a pulley. The inner ring (1) is installed inside the outer ring (2). A rubber ring (3) is provided between the inner ring (1) and the outer ring (2). A belt groove (4) is provided on the circumferential surface of the outer ring (2). Multiple first heat dissipation holes (5) are provided on the outer ring (2) inside the belt groove (4). The multiple first heat dissipation holes (5) are arranged at equal intervals at the bottom of the belt groove (4). Multiple axially arranged second heat dissipation holes (6) are provided on the outer ring (2) below the first heat dissipation holes (5). The multiple second heat dissipation holes (6) are connected to the multiple first heat dissipation holes (5) one by one. Annular grooves (7) are provided on the side walls on both sides of the inner ring (1). Multiple inclined heat dissipation fins (8) are provided on the side wall of one of the annular grooves (7). The multiple heat dissipation fins (8) are arranged circumferentially on the inner ring (1).

2. The rubber vibration damping pulley according to claim 1, characterized in that, The tilt angle α of the heat sink (8) is 150°-155°.

3. The rubber vibration damping pulley according to claim 1, characterized in that, The outer wall of the inner ring (1) of the pulley is provided with a plurality of first protrusions (9) arranged at equal intervals, the inner wall of the rubber ring (3) is provided with a plurality of first grooves (10) corresponding to the first protrusions (9), the outer wall of the rubber ring (3) is provided with a plurality of second protrusions (11) arranged at equal intervals, and the inner wall of the outer ring (2) of the pulley is provided with a plurality of second grooves (12) corresponding to the second protrusions (11).

4. The rubber vibration damping pulley according to claim 1, characterized in that, The inner ring (1) of the pulley in the annular groove (7) is provided with a plurality of weight-reducing holes (13). The plurality of weight-reducing holes (13) are arranged in a circle on the inner ring (1) of the pulley. The weight-reducing holes (13) penetrate the inner ring (1) of the pulley axially and connect the two annular grooves (7).

5. A rubber vibration damping pulley according to claim 1, characterized in that, The outer ring (2) of the pulley is provided with a detachable heat insulation plate (14) on the side away from the heat sink (8). The heat insulation plate (14) is provided with a through hole (15), the diameter of which is smaller than the diameter of the annular groove (7).

6. A rubber vibration damping pulley according to claim 5, characterized in that, At least two limiting posts (16) are provided on the side of the heat insulation plate (14), and the limiting posts (16) are movably inserted into the second heat dissipation hole (6).

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