Middle output belt pulley structure

Abstract

The utility model discloses a centrally-mounted output belt pulley structure, and belongs to the technical field of belt pulleys. The problem that when an existing belt pulley is connected with a crankshaft, the crankshaft is prone to damage is solved. The belt wheel structure comprises a hub and an outer wheel ring, the hub is arranged in the middle of the inner circle of the outer wheel ring through a web plate, a shaft hole used for being connected with a crankshaft is formed in the hub, the shaft hole is an obliquely-formed conical hole, a key groove is formed in the shaft hole, a rubber damping ring used for reducing vibration is arranged on the hub, and the rubber damping ring is arranged in the middle of the inner circle of the outer wheel ring. A guide structure used for guiding a crankshaft to be inserted into the shaft hole is arranged on one side of the large end of the shaft hole, the guide structure is arranged at one end of the outer wheel ring, and a plurality of belt grooves are formed in the outer wheel ring. According to the centrally-mounted output belt pulley structure, under the condition that a crankshaft is effectively protected, stress is more uniform, the service life is effectively prolonged, and the centrally-mounted output belt pulley structure has the advantages of being convenient to use and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of belt pulleys, in particular to a central output belt pulley structure. Background Art

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted by the connecting rod, converts it into torque, outputs it through the crankshaft, and drives other accessories on the engine. The belt pulley installed at one end of the crankshaft is used to transmit the power output by the engine crankshaft to a compressor, a power steering pump, a water pump, a generator, etc.

[0003] The existing connection structure between the belt pulley and the crankshaft is usually arranged at one end of the belt pulley, resulting in the connection position between the belt pulley and the crankshaft being far from the shaft end, causing the force application point of the crankshaft to be far from the support point, making the crankshaft prone to breakage. At the same time, it also causes uneven force on the belt pulley, reducing its service life. In addition, the existing belt pulley connecting the crankshaft usually has a shock absorption function. The rubber shock absorption ring of the shock absorption structure is usually squeezed into the gap between the belt pulley and the hub, and is easily aged due to the heat generated by the friction between the belt and the belt pulley, thus losing the shock absorption effect. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a central output belt pulley structure aiming at the above deficiencies of the prior art, which is more uniform in force under the condition of effectively protecting the crankshaft, effectively extends the service life, and has the characteristics of convenient use and strong practicability.

[0005] The technical solution adopted by the utility model is: a central output belt pulley structure, including a hub and an outer ring. The hub is arranged in the middle position of the inner circle of the outer ring through a web. The hub is provided with a shaft hole for connecting the crankshaft. The shaft hole is an inclined tapered hole. A keyway is provided on the shaft hole. A rubber shock absorption ring for reducing vibration is provided on the hub. A guiding structure for guiding the crankshaft to insert into the shaft hole is provided on one side of the larger end of the shaft hole. The guiding structure is arranged at one end of the outer ring. A plurality of belt grooves are provided on the outer ring.

[0006] As a further improvement, the guiding structure includes a guiding plate and a plurality of supporting plates. The guiding plate is connected to the outer ring through a plurality of uniformly arranged supporting plates. A guiding hole is provided on the guiding plate, and the guiding hole is aligned with the shaft hole.

[0007] Further, a plurality of reinforcing ribs are provided on the web. The reinforcing ribs are uniformly distributed on the web, and both ends of the reinforcing ribs are respectively connected to the hub and the outer ring.

[0008] Further, a plurality of uniformly distributed weight-reducing grooves are provided on the web.

[0009] Furthermore, the number of the weight-reducing grooves and the reinforcing ribs is three each, and the weight-reducing grooves and the reinforcing ribs are arranged at intervals.

[0010] Furthermore, a groove is provided on the hub, the rubber damping ring is arranged on the groove, and a raised block is arranged at the middle position of the rubber damping ring.

[0011] Furthermore, a plurality of axially arranged heat dissipation holes are formed in the outer rim.

[0012] Beneficial effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] In the middle-mounted output pulley structure of the utility model, by arranging the hub at the middle position of the inner circle of the outer rim, the overall force on the pulley is more uniform, the service life is increased. At the same time, the force application point of the middle-mounted pulley is closer to the position of the crankshaft end, so that the force application point of the crankshaft is closer to the support point, thus making the crankshaft not easily break. By arranging the guiding structure, under the guiding action of the guiding holes of the guiding plate, it is convenient to quickly and accurately insert the crankshaft into the shaft hole in a narrow space, playing a role in facilitating installation. By arranging the rubber damping ring on the hub, the distance between the damping part and the crankshaft is shorter, and the overall damping effect is better, effectively prolonging the service life of the pulley, and having the characteristics of convenient use and wide application range. Description of the drawings

[0015] Figure 1 is the front view structural schematic diagram of the utility model;

[0016] Figure 2 is the sectional view structural schematic diagram of the utility model.

[0017] Wherein: 1 - hub, 2 - guiding structure, 3 - outer rim, 4 - web, 5 - reinforcing rib, 6 - rubber damping ring, 7 - shaft hole, 8 - keyway, 9 - heat dissipation hole, 10 - weight-reducing groove, 11 - belt groove, 12 - raised block, 13 - groove, 21 - support plate, 22 - guiding plate, 23 - guiding hole. Specific embodiments

[0018] The following further describes the utility model with reference to the specific embodiments in the drawings.

[0019] Refer to Figure 1-2As shown in the figure, a central output pulley structure of the present utility model comprises a hub 1 and an outer rim 3. The hub 1 is arranged in the middle of the inner circle of the outer rim 3 through a web 4. A shaft hole 7 for connecting a crankshaft is provided on the hub 1. The shaft hole 7 is an inclined tapered hole. A keyway 8 is provided on the shaft hole 7. A rubber shock-absorbing ring 6 for reducing vibration is provided on the hub 1. A guiding structure 2 for guiding the crankshaft to insert into the shaft hole 7 is provided on one side of the larger end of the shaft hole 7. The guiding structure 2 is arranged on one end of the outer rim 3. A plurality of belt grooves 11 are provided on the outer rim 3. By arranging the hub 1 in the middle of the inner circle of the outer rim 3, the overall force on the pulley is more uniform, increasing the service life. At the same time, the force application point of the central pulley is closer to the position of the crankshaft shaft end, making the force application point of the crankshaft closer to the support point, so that the crankshaft is not easily broken. By providing the guiding structure 2, under the guiding action of the guiding hole 23 of the guiding plate 22, it is convenient to quickly and accurately insert the crankshaft into the shaft hole 7 in a narrow space, playing a role in facilitating installation. By providing the rubber shock-absorbing ring 6 on the hub 1, the distance between the shock-absorbing member and the crankshaft is shorter, and the overall shock-absorbing effect is better. At the same time, the influence of the frictional heat generated by the belt is reduced, ensuring the elastic force of the rubber shock-absorbing ring 6 and effectively extending the service life of the pulley.

[0020] Specifically, the guiding structure 2 comprises a guiding plate 22 and a plurality of support plates 21. The guiding plate 22 is connected to the outer rim 3 through a plurality of uniformly arranged support plates 21. A guiding hole 23 is provided on the guiding plate 22. The guiding hole 23 is aligned with the shaft hole 7. The support plates 21 play a connecting role, enabling the guiding plate 22 to be installed on the outer rim 3. The guiding hole 23 plays a guiding role. Since the guiding hole 23 is at one end of the outer rim 3, it is easier to align with the shaft hole 7 arranged in the middle position, facilitating installation in a narrow space.

[0021] Preferably, a plurality of reinforcing ribs 5 are provided on the web 4. The reinforcing ribs 5 are evenly distributed on the web 4. Both ends of the reinforcing ribs 5 are respectively connected to the hub 1 and the outer rim 3. The reinforcing ribs 5 play a role in strengthening the mechanical properties, improving the overall mechanical strength and avoiding cracking during use.

[0022] Furthermore, a plurality of uniformly distributed weight-reducing grooves 10 are provided on the web 4, playing a role in weight reduction and reducing production costs.

[0023] Furthermore, both the number of the weight-reducing grooves 10 and the number of the reinforcing ribs 5 are three. The weight-reducing grooves 10 and the reinforcing ribs 5 are arranged at intervals. The reasonable arrangement can reduce materials while still having sufficient strength, playing a role in reducing costs.

[0024] Furthermore, a groove 13 is provided on the hub 1, and the rubber damping ring 6 is arranged on the groove 13. A raised block 12 is provided at the middle position of the rubber damping ring 6. The raised block 12 effectively prevents the rubber damping ring 6 from falling off during use. The rubber damping ring 6 plays a role in damping and effectively extends the service life of the pulley.

[0025] Furthermore, a plurality of axially arranged heat dissipation holes 9 are formed in the outer rim 3, which is beneficial to discharging the heat inside the outer rim 3 and avoiding the decrease of material performance caused by too high temperature.

[0026] When the in - middle output pulley structure of this embodiment is in use, by arranging the hub 1 at the middle position of the inner circle of the outer rim 3, the overall force on the pulley is more uniform, increasing its service life. At the same time, the force - bearing point of the in - middle pulley is closer to the end of the crankshaft, making the force - bearing point of the crankshaft closer to the support point, so that the crankshaft is not easily broken. By setting the guiding structure 2, under the guiding action of the guiding hole 23 of the guiding plate 22, it is convenient to quickly and accurately insert the crankshaft into the shaft hole 7 in a narrow space, playing a role in facilitating installation. By arranging the rubber damping ring 6 on the hub 1, the distance between the damping part and the crankshaft is shorter, and the overall damping effect is better, effectively extending the service life of the pulley. The in - middle output pulley structure of the present utility model is more uniform in force under the condition of effectively protecting the crankshaft, effectively extending the service life, and has the characteristics of convenient use and strong practicability.

[0027] The above - mentioned is only the preferred embodiment of the present utility model. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can be made, which will not affect the implementation effect of the present utility model and the practicability of the patent.

Claims

1. A central output pulley structure, characterized in that It includes a hub (1) and an outer rim (3). The hub (1) is arranged at the middle position of the inner circle of the outer rim (3) through a web (4). An axial hole (7) for connecting a crankshaft is provided on the hub (1). The axial hole (7) is an inclined tapered hole. A keyway (8) is provided on the axial hole (7). A rubber shock-absorbing ring (6) for reducing vibration is provided on the hub (1). A guiding structure (2) for guiding the crankshaft to insert into the axial hole (7) is provided on one side of the larger end of the axial hole (7). The guiding structure (2) is arranged on one end of the outer rim (3). A plurality of belt grooves (11) are provided on the outer rim (3).

2. The middle output pulley structure according to claim 1, characterized in that, The guiding structure (2) includes a guiding plate (22) and a plurality of supporting plates (21). The guiding plate (22) is connected to the outer rim (3) through a plurality of uniformly arranged supporting plates (21). A guiding hole (23) is provided on the guiding plate (22). The guiding hole (23) is aligned with the axial hole (7).

3. The structure of a center-mounted output pulley according to claim 1, characterized in that, A plurality of reinforcing ribs (5) are provided on the web (4). The reinforcing ribs (5) are uniformly distributed on the web (4). Both ends of the reinforcing ribs (5) are respectively connected to the hub (1) and the outer rim (3).

4. The in - center output pulley structure according to claim 3, characterized in that, A plurality of uniformly distributed weight-reducing grooves (10) are provided on the web (4).

5. The structure of a central output pulley according to claim 4, wherein The number of the weight-reducing grooves (10) and the reinforcing ribs (5) is three. The weight-reducing grooves (10) and the reinforcing ribs (5) are arranged at intervals.

6. The mid-mounted output pulley structure according to claim 1, characterized in that, A groove (13) is provided on the hub (1). The rubber shock-absorbing ring (6) is arranged on the groove (13). A raised block (12) is provided at the middle position of the rubber shock-absorbing ring (6).

7. The mid-mounted output pulley structure according to claim 1, characterized in that, A plurality of axially arranged heat dissipation holes (9) are provided on the outer rim (3).

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