CN214788912U

CN214788912U - Crankshaft pulley assembly

Info

Publication number: CN214788912U
Application number: CN202022764682.7U
Authority: CN
Inventors: 张超; 潘孝勇
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-11-19
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a crankshaft pulley assembly, which comprises a hub, a rubber ring and an inertia ring, wherein the inertia ring is coaxially fixed at the periphery of the hub, the rubber ring is fixed between the hub and the inertia ring, the hub is provided with a cavity, an arc eccentric block is fixed on the side wall of the cavity, and the curvature of the arc eccentric block is equal to that of the hub; the three-cylinder engine has the advantages that the three-cylinder engine can operate stably, the cylinder is not easy to pull, the overall occupied space is reduced, and the production cost can be reduced.

Description

Crankshaft pulley assembly

Technical Field

The utility model relates to an automobile parts technical field especially involves a crankshaft pulley assembly.

Background

The three-cylinder engine is an engine consisting of three cylinders, and three identical single cylinders are arranged in the three-cylinder engine on one engine body to share one crankshaft to output power, and mainly used for converting chemical energy into mechanical energy. The basic principle of the three-cylinder engine is that when chemical energy of gasoline (diesel oil) is converted into heat energy, mixed gas in a sealed cylinder is combusted and expanded, so that a piston is pushed to do work, and the heat energy is converted into mechanical energy. As one small-sized engine, the three-cylinder engine has the advantages of high power, compact structure and the like, but from the vibration perspective, the three-cylinder engine has the balance characteristic inferior to that of a four-cylinder engine, and unbalanced internal and external moments of the three-cylinder engine are main causes of low-frequency vibration of the whole engine and the whole vehicle.

Therefore, the output shaft of the three-cylinder engine is connected with the crankshaft pulley and then is usually connected with a flywheel gear ring assembly, the flywheel gear ring assembly has larger rotational inertia and can store part of energy of the engine in a working stroke so as to overcome resistance in other strokes and enable the crankshaft pulley to rotate uniformly, and the engine and an automobile transmission system are connected to transmit power through a clutch arranged on the flywheel.

The adoption of the flywheel gear ring connected with the additional flywheel can play a balancing role and play a certain role in reducing the low-frequency vibration of the whole vehicle, but the additional installation space needs to be designed for the flywheel gear ring on the vehicle body, and in addition, the overall production cost is also obviously increased.

Disclosure of Invention

In order to solve the deficiencies existing in the prior art, the utility model provides a crankshaft pulley assembly, it can make three-cylinder engine operate steadily, is difficult for drawing the jar, reduces whole occupation space, and can reduce manufacturing cost.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a crankshaft pulley assembly, includes wheel hub, rubber circle and inertia ring, the inertia ring coaxial fixation be in wheel hub's periphery, the rubber circle fix wheel hub with the inertia ring between, wheel hub have a cavity, the lateral wall of cavity on be fixed with the arc eccentric block, the curvature of arc eccentric block with wheel hub's curvature equal.

The hub comprises a hub-shaped part and a tooth-shaped part which are fixed with each other, the rubber ring is sleeved on the hub-shaped part, the tooth-shaped part is provided with a first belt groove, and the inertia ring is provided with a second belt groove. In the structure, the hub-shaped part is used for being connected with the rubber ring, and the first belt groove formed in the tooth-shaped part and the second belt groove formed in the inertia ring are both used for connecting a belt.

The middle part of the outer surface of the hub-shaped part is provided with a convex ring which protrudes outwards, and the inner surface of the inertia ring is correspondingly provided with a concave matched with the convex ring. In the structure, the bulge is embedded in the recess, so that the rotating torque force and the crankshaft axial force of the automobile engine in high-speed rotation are ensured, and the inertia ring cannot fall off.

The hub-shaped part is connected with the tooth-shaped part through an arc edge, the arc edge is divided into a limiting section and an installation section, the limiting section corresponds to the arc-shaped eccentric block in position, the arc length of the limiting section corresponds to the arc length of the arc-shaped eccentric block, and a plurality of noise reduction holes communicated with the cavity are circumferentially and equidistantly distributed on the installation section. In this structure, the hole of making an uproar that falls sets up can be when the engine drives the high-speed rotation of crank pulley assembly, and the air of gathering in the cavity can in time be from making an uproar the hole discharge of making an uproar to produce the turbulent flow, thereby avoid arousing the sound wave, can effectively restrain the production of noise, it is seted up on the installation section, from not influencing the motion of arc eccentric block, can effectively reduce the vibration that three jar engines produced.

The number of the noise reduction holes is three or five. The advantage is that the airflow is disturbed to the maximum extent under the condition of not influencing the integral strength, thereby reducing the noise of operation.

The number of the noise reduction holes is three, each noise reduction hole is an arc-shaped strip-shaped hole, and each noise reduction hole consists of an inner arc section, an outer arc section and a semi-arc section which is connected with the inner arc section and the two ends of the outer arc section. The noise reduction hole with the structure can enlarge the area of the noise reduction hole as much as possible under the condition of not influencing the overall strength, thereby being beneficial to causing air flow to generate turbulent flow and reducing noise.

The center of the upper surface of the tooth-shaped part is provided with a mounting hole communicated with the cavity, the upper surface of the tooth-shaped part is also provided with a plurality of positioning holes, and the positioning holes are uniformly arranged around the mounting hole. In the structure, the mounting hole is used for the output shaft of the engine to extend through, and the positioning hole is convenient for positioning and mounting, so that the assembly can be firmly connected and fixed with the engine.

The hub is an A356 aluminum alloy hub. In this structure, adopt specific A356 aluminum alloy wheel hub, compare traditional wheel hub and do not influence under the circumstances of bulk strength, can alleviate holistic weight again, and life obviously obtains the extension, and comprehensive properties obtains promoting.

The inertia ring is cast iron inertia ring. In the structure, the inertia ring is made of cast iron, so that the strength can be improved, and the service life can be prolonged.

Compared with the prior art, the utility model has the advantages of: the arc-shaped eccentric block is fixed on the side wall of the cavity, centrifugal force is generated in the rotation process of the assembly, and therefore vibration of an engine is balanced, and compared with the traditional flywheel gear ring, the whole occupied space is reduced, and the production cost is reduced; the curvature of the arc eccentric block is equal to that of the hub, so that the integral rotation is not influenced, and the centrifugal force can be generated to balance the vibration of the engine; the utility model discloses can make three jar engines operate steadily, be difficult for drawing the jar, reduce whole occupation space, and can reduce manufacturing cost.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of a hub of the present invention;

fig. 3 is a top view of the wheel hub of the present invention;

fig. 4 is a schematic perspective view of the exploded structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples, but the present invention is not limited thereto.

The first embodiment is as follows: as shown in the figure, a crankshaft pulley assembly, including wheel hub 1, rubber circle 2 and inertia ring 3, inertia ring 3 coaxial fixation is in wheel hub 1's periphery, and rubber circle 2 is fixed between wheel hub 1 and inertia ring 3, and wheel hub 1 has a cavity 10, is fixed with arc eccentric block 4 on the lateral wall of cavity 10, and the camber of arc eccentric block 4 equals with wheel hub 1's camber.

Example two: as shown in the figures, the other structure is the same as the first embodiment, except that the hub 1 includes a hub-shaped portion 11 and a tooth-shaped portion 12 fixed to each other, the rubber ring 2 is sleeved on the hub-shaped portion 11, the tooth-shaped portion 12 is provided with a first belt groove 13, and the inertia ring 3 is provided with a second belt groove 32. In this structure, the hub 11 is used to connect the rubber ring 2, and the first belt groove 13 formed in the tooth 12 and the second belt groove 32 formed in the inertia ring 3 are used to connect the belt.

The middle part of the outer surface of the hub 11 is provided with a convex ring which is convex outwards 15, and the inner surface of the inertia ring 3 is correspondingly provided with a concave 31 which is matched with the convex ring. In this structure, the protrusion 15 is fitted into the recess 31, which ensures the rotational torque force and the crankshaft axial force of the automobile engine at the time of high-speed rotation, so that the inertia ring 3 does not fall off.

Example three: as shown in the figures, the other structures are the same as those of the embodiment, but the difference is that the hub portion 11 is connected with the tooth portion 12 through an arc edge 16, the arc edge 16 is divided into a limiting section 17 and a mounting section 18, the limiting section 17 corresponds to the arc eccentric block 4, the arc length of the limiting section 17 corresponds to the arc length of the arc eccentric block 4, and a plurality of noise reduction holes 5 communicated with the cavity 10 are circumferentially and equidistantly distributed on the mounting section 18. In this structure, the setting of making an uproar hole 5 can be when the engine drives the high-speed rotation of crank pulley assembly, and the air of gathering in cavity 10 can in time be from making an uproar hole 5 discharges of making an uproar to produce the turbulent flow, thereby avoid arousing the sound wave, can effectively restrain the production of noise, it is seted up on installation section 18, from not influencing the motion of arc eccentric block 4, can effectively reduce the vibration that three-cylinder engine produced.

The number of the noise reduction holes 5 is three or five. The advantage is that the airflow is disturbed to the maximum extent under the condition of not influencing the integral strength, thereby reducing the noise of operation.

The number of the noise reduction holes 5 is three, each noise reduction hole 5 is an arc-shaped strip-shaped hole, and each noise reduction hole 5 is composed of an inner arc section 51, an outer arc section 52 and a semi-arc section 53 which is connected with the two ends of the inner arc section 51 and the outer arc section 52. The noise reduction hole 5 with the structure can enlarge the area of the noise reduction hole 5 as much as possible under the condition of not influencing the overall strength, thereby being beneficial to causing air flow to generate turbulent flow and reducing noise.

Example four: as shown in the figures, the other structure is the same as that of the embodiment, but the difference is that a mounting hole 19 communicated with the cavity 10 is formed in the center of the upper surface of the tooth-shaped portion 12, a plurality of positioning holes 14 are further formed in the upper surface of the tooth-shaped portion 12, and the positioning holes 14 are uniformly arranged around the mounting hole 19. In the structure, the mounting hole 19 is used for the output shaft of the engine to extend through, and the positioning hole 14 is convenient for positioning and mounting, so that the assembly can be firmly connected and fixed with the engine.

The hub 1 is an A356 aluminum alloy hub 1. In this structure, adopt specific A356 aluminum alloy wheel hub 1, compare traditional wheel hub 1 under the condition that does not influence bulk strength, can alleviate holistic weight again, and life obviously obtains the extension, and comprehensive properties obtains promoting.

The inertia ring 3 is a cast iron inertia ring. In the structure, the inertia ring 3 is made of cast iron, so that the strength can be improved, and the service life can be prolonged.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the present invention can also be modified in materials and structures, or replaced by technical equivalents. Therefore, all structural equivalents which may be made by applying the present invention to the specification and drawings, or by applying them directly or indirectly to other related technical fields, are intended to be encompassed by the present invention.

Claims

1. The utility model provides a crankshaft pulley assembly, includes wheel hub, rubber circle and inertia ring, the inertia ring coaxial fixation in wheel hub's periphery, the rubber circle fix wheel hub with the inertia ring between, wheel hub have a cavity, its characterized in that: the side wall of the cavity is fixed with an arc eccentric block, and the curvature of the arc eccentric block is equal to that of the hub.

2. A pulley assembly according to claim 1, wherein: the hub comprises a hub-shaped part and a tooth-shaped part which are fixed with each other, the rubber ring is sleeved on the hub-shaped part, the tooth-shaped part is provided with a first belt groove, and the inertia ring is provided with a second belt groove.

3. A pulley assembly according to claim 2, wherein: the middle part of the outer surface of the hub-shaped part is provided with a convex ring which protrudes outwards, and the inner surface of the inertia ring is correspondingly provided with a concave matched with the convex ring.

4. A pulley assembly according to claim 2, wherein: the hub-shaped part is connected with the tooth-shaped part through an arc edge, the arc edge is divided into a limiting section and an installation section, the limiting section corresponds to the arc eccentric block in position, the arc length of the limiting section corresponds to the arc length of the arc eccentric block, and a plurality of noise reduction holes communicated with the cavity are circumferentially and equidistantly distributed on the installation section.

5. A pulley assembly according to claim 4, wherein: the number of the noise reduction holes is three or five.

6. A pulley assembly according to claim 5, wherein: the number of the noise reduction holes is three, each noise reduction hole is an arc-shaped strip-shaped hole, and each noise reduction hole consists of an inner arc section, an outer arc section and a semi-arc section which is connected with the inner arc section and the two ends of the outer arc section.

7. A pulley assembly according to claim 2, wherein: the center of the upper surface of the tooth-shaped part is provided with a mounting hole communicated with the cavity, the upper surface of the tooth-shaped part is also provided with a plurality of positioning holes, and the positioning holes are uniformly arranged around the mounting hole.

8. A pulley assembly according to claim 2, wherein: the hub is an A356 aluminum alloy hub.

9. A pulley assembly according to claim 8, wherein: the inertia ring is cast iron inertia ring.