CN205350192U - Drive shaft assembly and vehicle - Google Patents

Abstract

The utility model provides a drive shaft assembly and a vehicle, belonging to the field of vehicle manufacturing. The drive shaft assembly is located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body. The drive shaft assembly includes a drive shaft and a double damping dynamic vibration absorber for changing the resonance frequency of the drive shaft. The double damping dynamic vibration absorber The device is nested at the drive shaft. The utility model also provides a vehicle, including the drive shaft assembly. The utility model can effectively change the resonance frequency of the driving shaft by adding double damping dynamic vibration absorbers, so that the engine and the driving shaft will not resonate during the working process of the vehicle, which improves the roaring environment in the vehicle interior and improves the riding comfort of vehicle users. The comfort level improves the NVH performance of the vehicle. At the same time, the drive shaft has a simple structure, and the double damping dynamic shock absorber is easy to install and has high practicability.

Description

A drive shaft assembly and vehicle

technical field

The utility model relates to the field of vehicle manufacturing, in particular to a drive shaft assembly and a vehicle.

Background technique

NVH (English full name: Noise, Vibration, Harshness, Chinese full name: Noise, Vibration and Harshness) is a comprehensive problem to measure the quality of automobile manufacturing, especially it is directly related to the ride comfort of vehicle users. Higher NVH performance means less noise and less vibration transmitted to the cabin, thus effectively improving the ride comfort in the cabin.

As customers at home and abroad have increasingly stringent requirements for interior comfort, it is increasingly urgent to improve vehicle NVH performance. At present, one way is to change the resonance frequency of the drive shaft so that the engine and the drive shaft will not generate resonance and noise, so that the strong vibration and noise generated by the resonance will not be transmitted to the cabin, which improves the NVH performance of the vehicle. Among them, the resonant frequency is mainly changed by adding a single damping vibration absorber to the drive shaft. However, the single damping vibration absorber has strict requirements on the consistency of rubber damping, and some defective products will appear in the production process, and its impact on the drive shaft The decreasing effect of the shaft resonance frequency is not very obvious, and the vibration and noise generated by the resonance between the engine and the drive shaft cannot be effectively eliminated.

Therefore, this patent considers the above existing problems, and invents a drive shaft and a vehicle, which solves the problem of resonance between the drive shaft and the engine without affecting the normal function of the drive shaft, and improves the NVH performance of the vehicle.

Utility model content

One purpose of the present utility model is to provide a drive shaft assembly to solve the problem of resonance between the drive shaft and the engine, improve the roaring environment in the vehicle interior, and further improve the NVH performance of the vehicle.

A further object of the present invention is to provide a vehicle with good NVH performance and effectively reduced vibration and noise inside the vehicle.

In particular, the utility model provides a drive shaft assembly, which is located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body. The drive shaft assembly includes: a drive shaft and double damping power for changing the resonance frequency of the drive shaft A shock absorber, the double-damping dynamic shock absorber is nested at the drive shaft.

Further, the double-damping dynamic vibration absorber is composed of two single-damping dynamic vibration absorbers, the single-damping dynamic vibration absorber is circular and hollow inside, and the two single-damping dynamic vibration absorbers are arranged in parallel axially and pass through rubber connection.

Further, the single-damping dynamic vibration absorber is divided into an inner layer and an outer layer, the inner layer is a ring-shaped structure, and the outer layer covers the inner layer.

Further, the inner layer is made of metal material, and the outer layer is made of rubber material.

Further, the double-damping dynamic shock absorber is composed of three parts, the first part is two ring-shaped structures, and the two ring-shaped structures are made of metal materials, and the second part is wrapped around the two rings. The rubber layer on the outer surface of the ring-shaped structure, and the third part is the rubber layer covering the two ring-shaped structures except the second part.

In particular, another object of the present utility model is to provide a vehicle, including a drive shaft assembly located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body. The drive shaft assembly includes: a drive shaft and a drive shaft for changing A double-damping dynamic vibration absorber with the resonant frequency of the driving shaft is provided, and the double-damping dynamic vibration absorber is nested at the driving shaft.

Further, the double-damping dynamic vibration absorber is composed of two single-damping dynamic vibration absorbers, the single-damping dynamic vibration absorber is circular and hollow inside, and the two single-damping dynamic vibration absorbers are arranged in parallel axially and pass through rubber connection.

Further, the single-damping dynamic vibration absorber is divided into an inner layer and an outer layer, the inner layer is a ring-shaped structure, and the outer layer covers the inner layer.

Further, the inner layer is made of metal material, and the outer layer is made of rubber material.

Further, the double-damping dynamic shock absorber is composed of three parts, the first part is two ring-shaped structures, and the two ring-shaped structures are made of metal materials, and the second part is wrapped around the two rings. The rubber layer on the outer surface of the ring-shaped structure, and the third part is the rubber layer covering the two ring-shaped structures except the second part.

The drive shaft assembly of the utility model can effectively change the resonant frequency of the drive shaft by adding double damping dynamic shock absorbers, so that the engine and the drive shaft will not resonate during the working process of the vehicle, and the roaring environment in the car interior is improved. The ride comfort of the vehicle user is improved, and the NVH performance of the vehicle is improved. At the same time, the drive shaft has a simple structure, and the double-damping dynamic shock absorber is easy to install and has high practicability. Furthermore, the vehicle including the drive shaft assembly has higher NVH performance and higher practicability.

Description of drawings

Hereinafter, some specific embodiments of the present utility model will be described in detail in an exemplary rather than restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of a drive shaft assembly according to an embodiment of the present invention;

Fig. 2 is a sectional view of the dual-damping dynamic shock absorber in Fig. 1 .

detailed description

Example 1

Fig. 1 is a schematic diagram of a drive shaft assembly according to an embodiment of the present invention, and Fig. 2 is a sectional view of the double-damping dynamic shock absorber in Fig. 1 . As shown in Figure 1, the drive shaft assembly may generally include a drive shaft 1 located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body; and a double damping dynamic shock absorber for changing the resonance frequency of the drive shaft 1 2. Nested on the drive shaft 1.

During the operation of the vehicle, especially during the acceleration of the vehicle engine, the frequency of the engine keeps changing. In this process, the frequency of the engine at a certain speed coincides with the frequency of the drive shaft, and the two will resonate. Strong vibration and noise will be generated, and these vibration and noise will be transmitted to the compartment of the vehicle, seriously affecting the ride comfort of the vehicle user. For this reason, by adding double damping dynamic vibration absorber 2 on the drive shaft 1, the resonance frequency of the drive shaft 1 can be adjusted under the action of the double damping dynamic vibration absorber 2, so that it will not be in contact with the drive shaft within a certain speed range of the engine. 1 Resonance phenomenon occurs, thereby avoiding the strong vibration and noise generated by resonance from entering the vehicle interior, improving the interior environment of the vehicle, providing a quieter and more comfortable space for drivers and passengers, and improving the NVH performance of the vehicle, among which , the certain rotational speed range of the above-mentioned engine is 0-4000rpm.

In addition, the drive shaft 1 is added with a double damping dynamic shock absorber 2, as can be seen from Figure 1, compared with changing the solid rod structure of the drive shaft 1 into a large-diameter solid rod, its weight is relatively less increased; The solid rod construction of axis 1 is transformed into a hollow rod construction, which also requires much less space for movement.

Further, the double-damping dynamic shock absorber 2 is composed of two single-damping dynamic shock absorbers, which are respectively a single-damping dynamic shock absorber 3 and a single-damping dynamic shock absorber 4. hollow, the two single damping dynamic shock absorbers are axially arranged in parallel and connected by rubber.

In this way, by changing the single-damping dynamic vibration absorber into double-damping dynamic vibration absorber 2, compared with adding a single-damping dynamic vibration absorber on the drive shaft 1, due to the stricter requirements on the consistency of the rubber damping of the single-damping dynamic vibration absorber, during the production process There will be some defective products, but the double-damping dynamic vibration absorber has a certain relaxation of the damping requirements, which can reduce the number of defective products and effectively reduce costs, and the double-damping dynamic vibration absorber 2 has a double-decreasing effect on the resonance frequency of the drive shaft 1 Effect, can effectively reduce the frequency and amplitude of the drive shaft 1, so the double damping dynamic shock absorber 2 can more effectively avoid the resonance effect of the drive shaft 1 and the engine in the speed range below 4000rpm, that is, during the acceleration process of the vehicle engine Among them, the double damping dynamic vibration absorber 2 can more effectively prevent the drive shaft 1 from resonating with the engine under the condition of easy production.

Preferably, as shown in Figure 2, the single damping dynamic shock absorber is divided into an inner layer 5 and an outer layer 6, the inner layer 5 is a circular structure, and the outer layer 6 covers the inner layer 5 , and the inner layer 5 is a metal material, and the outer layer 6 is a rubber material.

In this way, the inner layer 5 is covered by the outer layer 6 made of rubber, and the inner layer 5 is connected to the drive shaft 1 through the outer layer 6. On the one hand, the inner layer 5 can be tightly fixed on the drive shaft 1. Nearby, on the other hand, the resonant frequency of the drive shaft 1 can also be adjusted through the double action of the inner layer 5 and the outer layer 6, the adjustment effect is more obvious, and the working efficiency is effectively improved.

It should be noted that, according to the design requirements of the vehicle and the design requirements of the drive shaft 1 and the vehicle engine, the inner layer 5 can be adjusted in weight and size as required.

In other embodiments, the double-damping dynamic shock absorber is composed of three parts, the first part 5 is two ring-shaped structures, and the two ring-shaped structures are made of metal materials, and the second part 7 is coated on the The rubber layer on the outer surface of the two ring-shaped structures, the third part 6 is the rubber layer covering the two ring-shaped structures except the second part 7 .

In this way, by arranging the third part 6 between the drive shaft 1 and the first part 5, the first part 5 can be closely attached to the drive shaft 1. In addition, through the two parts of the first part 5 and the second part 7 The double function is used to adjust the resonance frequency of the drive shaft 1, the adjustment effect is more obvious, and the working efficiency is effectively improved.

It should be noted that, according to the design requirements of the vehicle and the design requirements of the drive shaft 1 and the vehicle engine, the weight and size of the first part 5 can be adjusted as required.

In addition, according to the requirements of the dynamic space of the vehicle, the installation position of the double damping dynamic shock absorber 2 can be adjusted on the long axis where the drive shaft 1 is located. At the same time, in order to make the matching between the drive shaft 1 and the double damping dynamic shock absorber 2 more flexible, The gap between the single damping dynamic shock absorber 3 and the single damping dynamic shock absorber 4 can also be adjusted.

Example 2

Referring to Fig. 1 and Fig. 2, the utility model also provides a vehicle, including the drive shaft assembly, the drive shaft assembly includes a drive shaft 1, which is located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body and a double damping dynamic vibration absorber 2 for changing the resonance frequency of the drive shaft 1 , nested on the drive shaft 1 .

During the operation of the vehicle, especially during the acceleration of the vehicle engine, the frequency of the engine keeps changing. In this process, the frequency of the engine at a certain speed coincides with the frequency of the drive shaft, and the two will resonate. Strong vibration and noise will be generated, and these vibration and noise will be transmitted to the compartment of the vehicle, seriously affecting the ride comfort of the vehicle user. For this reason, by adding double damping dynamic vibration absorber 2 on the drive shaft 1, the resonance frequency of the drive shaft 1 can be adjusted under the action of the double damping dynamic vibration absorber 2, so that it will not be in contact with the drive shaft within a certain speed range of the engine. 1 Resonance phenomenon occurs, thereby avoiding the strong vibration and noise generated by resonance from entering the vehicle interior, improving the interior environment of the vehicle, providing a quieter and more comfortable space for drivers and passengers, and improving the NVH performance of the vehicle, among which , the certain rotational speed range of the above-mentioned engine is 0-4000rpm.

In addition, the drive shaft 1 is added with a double damping dynamic shock absorber 2, as can be seen from Figure 1, compared with changing the solid rod structure of the drive shaft 1 into a large-diameter solid rod, its weight is relatively less increased; The solid rod construction of axis 1 is transformed into a hollow rod construction, which also requires much less space for movement.

Further, the double-damping dynamic shock absorber 2 is composed of two single-damping dynamic shock absorbers, which are respectively a single-damping dynamic shock absorber 3 and a single-damping dynamic shock absorber 4. hollow, the two single damping dynamic shock absorbers are axially arranged in parallel and connected by rubber.

In this way, by changing the single-damping dynamic vibration absorber into double-damping dynamic vibration absorber 2, compared with adding a single-damping dynamic vibration absorber on the drive shaft 1, due to the stricter requirements on the consistency of the rubber damping of the single-damping dynamic vibration absorber, during the production process There will be some defective products, but the double-damping dynamic vibration absorber has a certain relaxation of the damping requirements, which can reduce the number of defective products and effectively reduce costs, and the double-damping dynamic vibration absorber 2 has a double-decreasing effect on the resonance frequency of the drive shaft 1 Effect, can effectively reduce the frequency and amplitude of the drive shaft 1, so the double damping dynamic shock absorber 2 can more effectively avoid the resonance effect of the drive shaft 1 and the engine in the speed range below 4000rpm, that is, during the acceleration process of the vehicle engine Among them, the double damping dynamic vibration absorber 2 can more effectively prevent the drive shaft 1 from resonating with the engine under the condition of easy production.

Preferably, as shown in Figure 2, the single damping dynamic shock absorber is divided into an inner layer 5 and an outer layer 6, the inner layer 5 is a circular structure, and the outer layer 6 covers the inner layer 5 , and the inner layer 5 is a metal material, and the outer layer 6 is a rubber material.

In this way, the inner layer 5 is covered by the outer layer 6 made of rubber, and the inner layer 5 is connected to the drive shaft 1 through the outer layer 6. On the one hand, the inner layer 5 can be tightly fixed on the drive shaft 1. Nearby, on the other hand, the resonant frequency of the drive shaft 1 can also be adjusted through the double action of the inner layer 5 and the outer layer 6, the adjustment effect is more obvious, and the working efficiency is effectively improved.

It should be noted that, according to the design requirements of the vehicle and the design requirements of the drive shaft 1 and the vehicle engine, the inner layer 5 can be adjusted in weight and size as required.

In other embodiments, the double-damping dynamic shock absorber is composed of three parts, the first part 5 is two ring-shaped structures, and the two ring-shaped structures are made of metal materials, and the second part 7 is coated on the The rubber layer on the outer surface of the two ring-shaped structures, the third part 6 is the rubber layer covering the two ring-shaped structures except the second part 7 .

In this way, by arranging the third part 6 between the drive shaft 1 and the first part 5, the first part 5 can be closely attached to the drive shaft 1. In addition, through the two parts of the first part 5 and the second part 7 The double function is used to adjust the resonance frequency of the drive shaft 1, the adjustment effect is more obvious, and the working efficiency is effectively improved.

It should be noted that, according to the design requirements of the vehicle and the design requirements of the drive shaft 1 and the vehicle engine, the weight and size of the first part 5 can be adjusted as required.

In addition, according to the requirements of the dynamic space of the vehicle, the installation position of the double damping dynamic shock absorber 2 can be adjusted on the long axis where the drive shaft 1 is located. At the same time, in order to make the matching between the drive shaft 1 and the double damping dynamic shock absorber 2 more flexible, The gap between the single damping dynamic shock absorber 3 and the single damping dynamic shock absorber 4 can also be adjusted.

To sum up, the drive shaft assembly of the present invention and the vehicle with it can change the resonant frequency of the drive shaft 1 by adding the double damping dynamic shock absorber 2, so that during the working process of the vehicle, especially during the acceleration of the vehicle engine , the engine and the drive shaft 1 will not resonate, which improves the roaring environment in the vehicle interior, improves the ride comfort of the vehicle user, and improves the NVH performance of the vehicle. At the same time, the structure of the drive shaft 1 is simple, and the double damping power absorbs vibration The device 2 is easy to install and has high practicability.

So far, those skilled in the art should recognize that although a number of exemplary embodiments of the present invention have been shown and described in detail herein, they can still be used according to the present invention without departing from the spirit and scope of the present invention. Many other variations or modifications that conform to the principles of the utility model are directly determined or derived from the disclosed content of the new model. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A drive shaft assembly, located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body, characterized in that it comprises: a drive shaft and a double damping dynamic vibration absorber for changing the resonance frequency of the drive shaft, the double damping A dynamic vibration absorber is nested at the drive shaft. 2. The drive shaft assembly according to claim 1, wherein the double damping dynamic absorber is composed of two single damping dynamic absorbers, and the single damping dynamic absorber is circular and hollow inside, The two single damping dynamic shock absorbers are axially arranged in parallel and connected by rubber. 3. The drive shaft assembly according to claim 2, wherein the single damping dynamic shock absorber is divided into an inner layer and an outer layer, the inner layer is a circular structure, and the outer layer is covered the inner layer. 4. The drive shaft assembly according to claim 3, wherein the inner layer is made of metal material, and the outer layer is made of rubber material. 5. The drive shaft assembly according to claim 1, wherein the double damping dynamic shock absorber is composed of three parts, the first part is two annular structures, and the two annular structures are metal The second part is the rubber layer covering the outer surfaces of the two circular structures, and the third part is the rubber layer covering the two circular structures except the second part. 6. A vehicle, comprising a drive shaft assembly located in the middle of the bottom of the vehicle and distributed along the front and rear of the vehicle body, characterized in that the drive shaft assembly includes: a drive shaft and a double shaft for changing the resonance frequency of the drive shaft A damping dynamic shock absorber, the double damping dynamic shock absorber is nested on the drive shaft. 7. The vehicle according to claim 6, wherein the double-damping dynamic shock absorber is composed of two single-damping dynamic shock absorbers, the single-damping dynamic shock absorber is circular and hollow inside, and the two Two single damping dynamic shock absorbers are arranged in parallel axially and connected by rubber. 8. The vehicle according to claim 7, wherein the single damping dynamic shock absorber is divided into an inner layer and an outer layer, the inner layer is a circular structure, and the outer layer covers the inner layer layer. 9. The vehicle according to claim 8, wherein the inner layer is a metal material and the outer layer is a rubber material. 10. The vehicle according to claim 6, wherein the double damping dynamic shock absorber is composed of three parts, the first part is two ring-shaped structures, and the two ring-shaped structures are made of metal materials, and the second part The second part is the rubber layer covering the outer surfaces of the two annular structures, and the third part is the rubber layer covering the two annular structures except the second part.