阅读说明：本技术 电机悬置 (Motor suspension ) 是由 邬建海 胡成文 于 2020-07-20 设计创作，主要内容包括：一种电机悬置,通过在空心柱状或空心鼓状护套内设置芯管、再通过橡胶体将护套、芯管、以及设置在护套内部且均匀分布在芯管周围的共振质量块粘合形成一个整体,能够有效吸收和阻断悬置于车架上的电动汽车驱动电机工作时发出的高频振动和高频啸叫噪声,特别是800Hz以上的高频振动和高频啸叫噪声,给予电动车驾乘人员舒适的用车体验,减轻驾乘的疲劳,保证行车的安全。本发明通过在橡胶体中植入共振质量块组成一个共振结构,通过这种共振结构的自振动,可以有效减弱橡胶体的高频硬化,降低其高频动刚度,从而更好地降低驱动电机的高频振动和高频啸叫噪声；本发明还可用于其他电机、空压机等不同噪声源高频振动和高频啸叫噪声的吸收和阻断。(The utility model provides a motor suspension, through set up the core pipe in hollow column or hollow drum form sheath, the rethread rubber body with the sheath, the core pipe, and set up inside the sheath and evenly distributed the resonance quality piece bonding around the core pipe forms a whole, can effectively absorb and block the high frequency vibration and the high frequency noise of whistling that the electric automobile driving motor suspended on the frame sent during operation, especially the high frequency vibration and the high frequency noise of whistling more than 800Hz, give the comfortable experience of using of electric motor car driver and crew, alleviate the fatigue of riding, guarantee the safety of driving a vehicle. According to the invention, the resonance mass block is implanted into the rubber body to form a resonance structure, and the high-frequency hardening of the rubber body can be effectively weakened and the high-frequency dynamic stiffness of the rubber body is reduced through the self-vibration of the resonance structure, so that the high-frequency vibration and the high-frequency squeaking noise of the driving motor are better reduced; the invention can also be used for absorbing and blocking high-frequency vibration and high-frequency squeal noise of different noise sources such as other motors, air compressors and the like.)

1. A motor suspension is used for absorbing and blocking high-frequency vibration and high-frequency squeal noise which are generated when a driving motor of an electric automobile suspended on a frame works and are above 800Hz, and is characterized by comprising the following components:

the device comprises a sheath, a core pipe, a resonance mass block and a rubber body;

the sheath is in a hollow column shape or a hollow drum shape;

the core pipe is a tubular cylinder, the core pipe is arranged in the sheath and has the same longitudinal axis with the sheath, and two ends of the core pipe are not lower than two ends of the sheath;

the resonance mass blocks are arranged inside the sheath and are uniformly distributed around the core tube;

the rubber body is distributed on the outer side of the core pipe and the inner side of the sheath, the rubber body wraps the resonance mass block and forms a resonance structure body with the resonance mass block, and the outer sleeve, the core pipe and the resonance mass block form a whole through the rubber body.

2. The motor suspension of claim 1, wherein:

the resonance mass block is a sphere, a cylinder or a sheet, the sphere resonance mass block, the cylinder resonance mass block or the sheet resonance mass block is wrapped in the rubber body, or the periphery of the cylinder resonance mass block and the sheet resonance mass block is wrapped in the rubber body, and two ends of the cylinder resonance mass block and the sheet resonance mass block respectively extend out of the rubber body.

3. The motor suspension of claim 1, wherein: the resonance mass block is made of metal.

4. The motor suspension of claim 1, wherein: the metal is iron or aluminum.

5. The motor suspension of claim 1, wherein: the sheath is made of nylon or metal materials.

6. The motor suspension of claim 1, wherein: the core pipe is made of nylon or metal materials.

7. The motor suspension of claim 1, wherein: the rubber body, the outer sleeve, the core tube and the resonance mass block are bonded into a whole through a rubber vulcanization process.

8. The motor suspension of claim 1, wherein:

the quality adjusting holes are formed in the rubber body at one end of the sheath and are symmetrically distributed on two sides of the core pipe, the final quality of the motor suspension can be adjusted through adjustment of excavation depth of the quality adjusting holes, and then the resonance frequency of the resonance structure body is adjusted.

Technical Field

The invention relates to a motor suspension, in particular to a motor suspension for absorbing and blocking high-frequency vibration and high-frequency squeal noise generated when an electric automobile driving motor suspended on a frame works, particularly high-frequency vibration above 800Hz and high-frequency squeal noise, and belongs to the technical field of design and manufacture of electric automobile accessories.

Background

With the development of the automobile industry and the improvement of the environmental protection requirement, new energy automobiles, particularly electric automobiles, are more and more emphasized by various countries and automobile manufacturers, and the development is faster and faster.

The electric automobile is mainly or completely powered by a driving motor arranged on a frame.

The driving motor arranged on the frame of the electric automobile can generate high-frequency vibration and high-frequency squeal noise in the operation process, the high-frequency vibration and the high-frequency squeal noise are transmitted to the carriage through various modes, the driving experience of drivers and passengers can be seriously influenced, the drivers and the passengers can feel fatigue, and the driving comfort and the driving safety are influenced.

The method for solving the problems of high-frequency vibration and high-frequency squeal noise generated in the running process of the driving motor of the electric automobile mainly comprises the following two methods:

firstly, the method is tried to be solved from the source, namely the meshing state of the driving motor and the speed reducer is improved by improving the gear precision and the tooth form precision of the driving motor and the speed reducer, so that the vibration is reduced, and the high-frequency squeaking noise is eliminated, but the method has high cost and difficulty, and the input and output are not proportional, so that the current technology cannot achieve a satisfactory effect;

another method is to block or improve the transmission path of the high-frequency vibration and the high-frequency howling noise, wherein the simplest and most effective method is to block and reduce the high-frequency vibration and the high-frequency howling noise by providing a vibration damping mount between the driving motor and the connected vehicle frame.

Disclosure of Invention

In order to overcome the defects of the prior art, the embodiment of the invention provides a motor suspension, which aims to:

the motor suspension provided by the embodiment of the invention can effectively absorb and block high-frequency vibration and high-frequency squeal noise generated by an electric automobile driving motor suspended on a frame during working, particularly high-frequency vibration and high-frequency squeal noise above 800Hz, so that drivers and passengers of an electric automobile can feel more comfortable when using the electric automobile, the driving fatigue is reduced, the driving safety is ensured, meanwhile, the service life of the motor suspension is prolonged, the manufacturing and using cost is reduced, and the economic benefit is improved.

To achieve the purpose, the embodiment of the invention provides the following technical scheme:

a motor suspension is used for absorbing and blocking high-frequency vibration and high-frequency squeal noise which are generated when a driving motor of an electric automobile suspended on a frame works and are above 800Hz, and is characterized by comprising the following components:

the device comprises a sheath, a core pipe, a resonance mass block and a rubber body;

the sheath is in a hollow column shape or a hollow drum shape;

the core pipe is a tubular cylinder, the core pipe is arranged in the sheath and has the same longitudinal axis with the sheath, and two ends of the core pipe are not lower than two ends of the sheath;

the resonance mass blocks are arranged inside the sheath and are uniformly distributed around the core tube;

the rubber body is distributed on the outer side of the core pipe and the inner side of the sheath, the rubber body wraps the resonance mass block and forms a resonance structure body with the resonance mass block, and the outer sleeve, the core pipe and the resonance mass block form a whole through the rubber body.

Further, the resonance mass block is a sphere, a cylinder or a sheet, the sphere resonance mass block, the cylinder resonance mass block or the sheet resonance mass block is wrapped in the rubber body, or the periphery of the cylinder resonance mass block or the sheet resonance mass block is wrapped in the rubber body, and two ends of the cylinder resonance mass block or the sheet resonance mass block respectively extend out of the rubber body.

Furthermore, the resonance mass block is made of metal.

Further, the metal is iron or aluminum.

Further, the sheath is made of nylon or metal materials.

Further, the core pipe is made of nylon or metal materials.

Furthermore, the rubber body, the outer sleeve, the core tube and the resonance mass block are bonded into a whole through a rubber vulcanization process.

Further, the motor suspension further comprises quality adjusting holes, the quality adjusting holes are formed in the rubber body at one end of the sheath and are symmetrically distributed on two sides of the core pipe, the final quality of the motor suspension can be adjusted through adjustment of excavation depth of the quality adjusting holes, and then the resonance frequency of the resonance structure body is adjusted.

Compared with the prior art, the invention has the beneficial effects and remarkable progresses that:

1) according to the motor suspension provided by the embodiment of the invention, the core pipe is arranged in the hollow columnar or hollow drum-shaped sheath, and the sheath, the core pipe and the resonance mass blocks which are arranged in the sheath and uniformly distributed around the core pipe are bonded through the rubber body to form a complete motor suspension, so that high-frequency vibration and high-frequency squeal noise, particularly high-frequency vibration and high-frequency squeal noise above 800Hz, generated when an electric automobile driving motor suspended on a frame works can be effectively absorbed and blocked, comfortable use experience is provided for drivers and passengers of an electric automobile, driving fatigue is reduced, and driving safety is ensured;

2) according to the motor suspension provided by the embodiment of the invention, the resonance mass block is implanted into the rubber body, so that the resonance mass block and the rubber body form a resonance structure or a mass damping unit (English is called as: mass Damper) can effectively weaken the high-frequency hardening of the rubber body and reduce the high-frequency dynamic stiffness of the rubber body through the self-vibration of the resonance structure, thereby better reducing the high-frequency vibration and high-frequency squealing noise of the driving motor;

3) the motor suspension provided by the embodiment of the invention provides a new thought and a new method for designing and manufacturing the motor suspension for absorbing and blocking high-frequency vibration and high-frequency howling noise generated during the working of a motor, in some expanded embodiments, the resonant frequency of the motor suspension provided by the embodiment of the invention can be determined by means of analysis software such as finite elements, and the motor suspension with different resonant frequencies can be obtained by adjusting the weight of the resonant mass block, different positions of the resonant mass block implanted in a rubber body, changing the parameters such as the hardness of the rubber body and the like so as to absorb and block different high-frequency vibration and high-frequency howling noise generated during the working of different motors, thereby meeting the requirements of absorption and blocking of various different sensitive vibration frequencies;

4) the motor suspension provided by the embodiment of the invention has the advantages of simple structure, novel and unique design thought, convenient product use and obvious effect, is not only suitable for the suspension of the driving motor of the electric automobile, but also can be used for the absorption and blocking requirements of different noise sources such as other motors, air compressors and the like on high-frequency vibration and high-frequency squeaking noise;

5) the motor suspension provided by the embodiment of the invention has the advantages of simple manufacture and low cost, and the resonance mass block is implanted in the rubber body, so that the high-frequency hardening of the rubber body is weakened, the service life is prolonged, the use cost is reduced, and the economic benefit is improved.

Drawings

To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiment of the present invention will be briefly described below.

It should be apparent that the drawings in the following description are only drawings of some embodiments of the invention, and that other drawings can be obtained by those skilled in the art without inventive exercise, and the other drawings also belong to the drawings required by the embodiments of the invention.

Fig. 1 is a schematic perspective view of a cylindrical motor suspension according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a drum-shaped motor suspension according to an embodiment of the present invention;

fig. 3 is a schematic top view of a cylindrical motor suspension according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a section a-a in fig. 3.

Fig. 5 is a graph of a relationship between dynamic stiffness and vibration frequency of the motor suspension according to the embodiment of the present invention.

In the figure:

10-sheath, 20-core tube, 30-resonance mass block and 40-rubber body.

Detailed Description

In order to make the objects, technical solutions, advantageous effects and significant progress of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings provided in the embodiments of the present invention.

It is obvious that all the described embodiments are only a part of the embodiments of the present invention, not all the embodiments, and all other embodiments obtained by those skilled in the art without inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

It should be noted that: