阅读说明：本技术 减振齿轮及其发动机 (Vibration reduction gear and engine thereof ) 是由 黄第云 于 2020-06-23 设计创作，主要内容包括：本发明公开了一种减振齿轮及其发动机,包括齿轮本体及设于齿轮本体内圆周面的橡胶条,橡胶条的厚度b1设为(0.2～0.8)*H,橡胶条的宽度h1设为(2～5)*b1,其中,H为齿轮本体的厚度。本发明在齿轮的内圆周面贴上橡胶条来减低振动和吸收噪声。(The invention discloses a vibration reduction gear and an engine thereof, and the vibration reduction gear comprises a gear body and a rubber strip arranged on the inner circumferential surface of the gear body, wherein the thickness b1 of the rubber strip is set to be (0.2-0.8) H, the width H1 of the rubber strip is set to be (2-5) b1, and H is the thickness of the gear body. The invention sticks rubber strip on the inner circumference of gear to reduce vibration and absorb noise.)

1. The damping gear is characterized by comprising a gear body (1) and a rubber strip (2) arranged on the inner circumferential surface of the gear body (1), wherein the thickness b1 of the rubber strip (2) is set to be (0.2-0.8) H, the width H1 of the rubber strip (2) is set to be (2-5) b1, and H is the thickness of the gear body (1).

2. A vibration-damping gear according to claim 1, characterized in that the rubber strip (2) is mounted on the inner circumferential surface of the gear body (1) by vulcanization or press-in.

3. A vibration-reducing gear according to claim 1, characterised in that the gear body (1) is preferably a driving gear.

4. A vibration-reducing gear according to claim 1, characterised in that the rubber strip (2) is made of oil-resistant rubber, preferably ethylene propylene diene monomer.

5. A vibration-reducing gear according to claim 1, characterised in that the rubber strip (2) has a hardness of between 50 and 75 shore (a).

6. A vibration-damping gear according to claim 1, characterized in that the rubber strip (2) is provided in the form of a ring, and the ring-shaped rubber strip (2) is fitted to the inner circumferential surface of the gear body (1).

7. The vibration reduction gear according to claim 1, characterized in that the rubber strips (2) are strip-shaped, the number of the rubber strips (2) is at least two, and the at least two rubber strips (2) are symmetrically arranged along the center of the gear body (1).

8. An engine comprising a damper gear as claimed in any one of claims 1 to 7 provided on the engine.

Technical Field

The invention relates to the technical field of engines, in particular to a vibration reduction gear and an engine thereof.

Background

The development of gear drives is moving towards high speed, heavy load, light weight, high precision and automation, which puts higher demands on their dynamic performance. The vibration and noise of the gear transmission are the main sources of vibration noise of many mechanical devices, and how to control the vibration noise has important influence on the precision, the performance, the service life and the labor protection of operators of the mechanical devices.

The control of gear transmission noise is a very complicated system engineering, and two methods of active vibration reduction and passive vibration reduction are mainly adopted to solve the problem at present, wherein the active vibration reduction mainly comprises methods of improving manufacturing precision, modifying tooth surface shape and the like, although the meshing condition of the gear is improved by considering the structural parameters of the optimal gear such as tooth shape, pressure angle and the like during active design, the meshing impact, time-varying rigidity and the like of the gear cannot be avoided, and the active vibration reduction method can bring the defects of greatly improving manufacturing cost, increasing design calculation amount and the like. Among passive vibration damping techniques, damping vibration damping with viscoelastic materials is most widely used.

How to solve the problems of vibration reduction and noise reduction and realizing the industrial application of the gear transmission system have important significance.

During gear transmission, in order to ensure that a normal lubricating oil film is formed between tooth surfaces and prevent the gear from being clamped due to thermal expansion deformation caused by the rise of the working temperature of the gear, backlash is inevitably generated between gear pairs, and the rotation speed fluctuation of a driving gear and the backlash between the gears are important reasons and conditions for causing gear knocking.

Disclosure of Invention

In view of the above problems, the present invention provides a vibration reduction gear and an engine thereof, in which a rubber strip is attached to a surface of a gear to reduce vibration and absorb noise.

The invention adopts the following technical scheme to realize the purpose:

a damping gear comprises a gear body and a rubber strip arranged on the inner circumferential surface of the gear body, wherein the thickness b1 of the rubber strip is set to be (0.2-0.8) × H, the width H1 of the rubber strip is set to be (2-5) × b1, and H is the thickness of the gear body.

Preferably, the rubber strip is mounted on the inner circumferential surface of the gear body by a vulcanization process or press-in.

Preferably, the gear body is preferably a drive gear.

Preferably, the rubber strip is made of oil-resistant rubber, and the oil-resistant rubber is preferably ethylene propylene diene monomer rubber.

Preferably, the hardness of the rubber strip is 50-75 Shore (A).

Preferably, the rubber strip is annular, and the annular rubber strip is matched with the inner circumferential surface of the gear body.

Preferably, the rubber strips are arranged in a strip shape, the number of the rubber strips is at least two, and the at least two rubber strips are symmetrically arranged along the center of the gear body.

An engine comprising a damper gear as described above disposed on the engine.

The invention has the beneficial effects that:

1. according to the vibration reduction gear and the engine thereof, the rubber strips are adhered to the inner circumferential surface of the gear, so that the effects of reducing vibration and absorbing noise are achieved.

2. The rubber strip is made of oil-resistant rubber and has excellent hot air aging resistance and impact elasticity.

3. The fluctuation of the rotating speed of the driving gear is the most important condition for generating knocking, and the rubber strip is arranged on the driving gear, so that the vibration reduction effect is better.

Drawings

Fig. 1 is a front view of a damper gear provided in embodiment 1 of the present invention;

fig. 2 is a side view of a damper gear provided in embodiment 1 of the present invention;

fig. 3 is a side view of a damper gear provided in embodiment 2 of the present invention.

In the figure, 1 is a gear body, and 2 is a rubber strip.

Detailed Description

The present invention will be described in detail with reference to the accompanying fig. 1 to 3 and the embodiments.