CN219988975U - Motor suspension structure and vehicle - Google Patents

Abstract

The utility model provides a motor suspension structure and a vehicle. The motor suspension structure comprises a subframe, a first vibration isolator and a pair of vibration isolator assemblies, wherein the first vibration isolator is mounted on the front part of the subframe, the pair of vibration isolator assemblies is mounted on the rear part of the subframe, and a reinforcing piece is connected between the pair of vibration isolator assemblies; the vibration isolator assembly comprises a second vibration isolator, and the motor is fixedly connected with the first vibration isolator and the second vibration isolator respectively. Through multiunit isolator, the vibration of motor is absorbed from front portion and two positions in rear portion, and motor suspension structure has better vibration isolation effect. The pair of vibration isolation pad assemblies are connected into a whole through the reinforcing piece, so that the dynamic stiffness of the motor suspension structure is improved, and the vibration isolation effect is further enhanced.

Description

Motor suspension structure and vehicle

Technical Field

The utility model relates to the field of vehicle parts, in particular to a motor suspension structure and a vehicle.

Background

The motor suspension structure is an important part of a vehicle vibration isolation system, which is connected between the motor and the subframe or the vehicle body. The motor suspension structure can support the weight of the motor, limit the movement of the motor in the front cabin, and in addition, can isolate the vibration of the motor and the road surface and prevent the vibration from being transmitted to the inside of the vehicle through the auxiliary frame or the vehicle body. Along with the increasing requirements of vehicles on whole vehicle acceleration and endurance performance, the power and torque of a motor are gradually increased, and the vibration excitation of the motor is gradually increased. At present, the dynamic stiffness of the motor suspension structure is lower, the vibration isolation effect on the motor is poorer, and the motor can generate noise problems such as whistle and the like.

Accordingly, there is a need for an improved motor suspension structure and vehicle that address the above-described issues.

Disclosure of Invention

The utility model provides a motor suspension structure with high dynamic stiffness and good vibration isolation effect and a vehicle.

The utility model provides a motor suspension structure, which comprises a subframe, a first vibration isolator and a pair of vibration isolator assemblies, wherein the first vibration isolator is arranged at the front part of the subframe; the vibration isolator assembly comprises a second vibration isolator, and the motor is fixedly connected with the first vibration isolator and the second vibration isolator respectively.

Further, the vibration isolator assembly further comprises a framework assembled to the auxiliary frame, and a suspension bracket mounted to the framework, wherein the suspension bracket comprises a vibration isolator connecting portion assembled to the second vibration isolator.

Further, the first vibration isolator and the second vibration isolator are arranged in a bushing mode, and the axes of the first vibration isolator and the second vibration isolator are perpendicular.

Further, the vibration isolator connecting portion extends rearward to form a stiffener mounting portion, and both ends of the stiffener are assembled to the stiffener mounting portions of the pair of vibration isolator assemblies, respectively.

Further, the vibration isolator connecting part extends forwards to form a motor mounting plate, and a plurality of motor connecting parts are arranged on the motor mounting plate; the first vibration isolator is provided with a motor mounting hole, and the motor is connected to the motor mounting hole and the motor connecting portion.

Further, the number of the motor connecting portions is multiple, one motor connecting portion is close to the vibration isolator connecting portion, and two motor connecting portions are far away from the vibration isolator connecting portion and are located on the upper side and the lower side of the motor mounting plate respectively.

Further, the auxiliary frame comprises a front cross beam, a rear cross beam and a pair of longitudinal beams connecting the front cross beam and the rear cross beam, and the vibration isolator assembly is provided with a vibration isolator mounting part; the first vibration isolator is assembled into the front cross beam, and the second vibration isolator is assembled into the vibration isolator mounting portion.

Further, a first subframe connecting portion is formed by extending forward from the bottom of the vibration isolator mounting portion, a second subframe connecting portion is formed by extending backward from the bottom of the vibration isolator mounting portion, the first subframe connecting portion is assembled to the side member, and the second subframe connecting portion is assembled to the junction of the rear cross member and the side member.

Further, the second subframe connecting portions of the pair of vibration isolator assemblies extend toward each other to form a third subframe connecting portion, which is assembled to the rear cross member.

The utility model also provides a vehicle comprising the motor suspension structure.

The motor suspension structure of the present utility model includes a first vibration isolator mounted to a front portion of a subframe and a pair of vibration isolator assemblies mounted to a rear portion of the subframe, the vibration isolator assemblies including a second vibration isolator. Through multiunit isolator, the vibration of motor is absorbed from front portion and two positions in rear portion, and motor suspension structure has better vibration isolation effect. The pair of vibration isolation pad assemblies are connected into a whole through the reinforcing piece, so that the dynamic stiffness of the motor suspension structure is improved, and the vibration isolation effect is further enhanced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a perspective view of a motor suspension structure in an exemplary embodiment of the present utility model.

Fig. 2 is a perspective view of the isolator assembly and stiffener of fig. 1.

Fig. 3 is a perspective view of the suspension bracket and stiffener of fig. 2.

Reference numerals illustrate: a subframe 10; motor installation space, 100; a front cross member 11; vibration isolator mounting holes 111; a rear cross member 12; stringers, 13; a first vibration isolator 20; a motor mounting hole 21; a vibration isolator assembly 30; a skeleton, 31; vibration isolator mounting portion 311; a first subframe connection portion, 312; a second subframe connection portion 313; third subframe connection portions 314; a second vibration isolator 32; a suspension bracket 33; a vibration isolator connecting part 331; a stiffener mounting portion 332; a motor mounting plate 333; motor connection parts 334; reinforcing ribs 335; a mass block mounting portion 336; reinforcing elements, 40.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.

The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

Next, embodiments of the present specification will be described in detail.

As shown in fig. 1 and 2, the motor suspension structure of the present utility model includes a sub-frame 10, a first vibration isolator 20, and a pair of vibration isolator assemblies 30. A first vibration isolator 20 is mounted to the front portion of the subframe 10. A pair of vibration isolator assemblies 30 are mounted to the rear of subframe 10. A reinforcement 40 is connected between the pair of isolator assemblies 30. The isolator assembly 30 includes a second isolator 32. The motor is fixedly coupled to the first vibration isolator 20 and the second vibration isolator 32, respectively.

By assembling the first vibration isolator 20 at the front portion of the subframe 10 and assembling the vibration isolator assembly 30 provided with the second vibration isolator 32 at the rear portion of the subframe 10, vibrations from the motor and the road surface can be absorbed from a plurality of positions, so that the motor suspension structure has a good vibration isolation effect. The pair of vibration isolator assemblies 30 are connected by the reinforcing member 40 so that the pair of vibration isolator assemblies 30 are integrated, thereby improving dynamic stiffness and further enhancing vibration isolation effect.

As shown in fig. 1, the subframe 10 includes a front cross member 11, a rear cross member 12, and a pair of side members 13 connecting the front cross member 11 and the rear cross member 12. The front cross member 11 is provided with two vibration isolator mounting holes 111. The axis of the vibration isolator mounting hole 111 is horizontally disposed in the front-rear direction. The first vibration isolator 20 is press-fitted into the front cross member 11 through the isolator mounting hole 111. The first vibration isolator 20 absorbs vibration by deformation in the isolator mounting hole 111.

The first vibration isolator 20 is provided in the form of a bush, the axis of which is horizontal in the front-rear direction. The first vibration isolator 20 is provided with a motor mounting hole 21 which is connected with a motor through a bolt. In this embodiment, the number of the first vibration isolators 20 is two, and a four-point suspension is formed with the two second vibration isolators 32. Vibration from the road surface and the motor is dispersed to four points, so that the vibration isolation performance is ensured, and meanwhile, the use durability and the manufacturing cost are both considered. In other embodiments, the number of first vibration isolators 20 may be one, reducing manufacturing costs. And more than two vibration isolation performance and durability can be obtained.

As shown in fig. 2, a pair of vibration isolator assemblies 30 are disposed on the left and right sides of the rear portion of subframe 10. Vibration isolator assembly 30 includes a frame 31, a second vibration isolator 32, and a suspension bracket 33. The frame 31 is assembled to the subframe 10. The vibration isolator assembly 30 is provided with a vibration isolator mounting portion 311, and the second vibration isolator 32 is mounted into the vibration isolator mounting portion 311. The second vibration isolator 32 deforms in the isolator mount 311, absorbing vibration.

The second vibration isolator 32 is provided in the form of a bush, the axial direction of which is horizontally disposed in the left-right direction. The first vibration isolator 20 is perpendicular to the axis of the second vibration isolator 32. The motor can be limited in two directions. Meanwhile, vibration in two directions can be absorbed, and the vibration isolation effect of the motor suspension structure is enhanced.

A motor installation space 100 is provided between the first vibration isolator 20 and the vibration isolator assembly 30. The motor is assembled into the motor installation space 100. The motor may be directly fixed to the second vibration isolator 32 or may be indirectly fixed to the second vibration isolator 32 through the suspension bracket 33.

Taking the motor fixed by the first vibration isolator 20 and the suspension bracket 33 as an example, specifically: the vibration isolator mounting portion 311 is provided to the frame 31, and the second vibration isolator 32 is mounted to the frame 31. The motor is indirectly fixed to the second vibration isolator 32 by a suspension bracket 33. In some embodiments, the vibration isolator mounting portion 311 may also be provided to the suspension bracket 33, with the motor directly secured to the second vibration isolator 32. In this embodiment, the suspension bracket 33 may be assembled to the frame 31, or may be integrally formed with the frame.

By arranging the suspension bracket 33, the size of the suspension bracket 33 is changed according to the installation size requirements of different motors, and the structures of other parts are unchanged. The motor suspension structure has certain universality, reduces the development cost of parts and shortens the development time. For a motor with a larger size, the suspension bracket 33 is not required, and the motor is directly and fixedly connected with the second vibration isolator 32.

The bottom of the vibration isolator mounting portion 311 extends forward to form a first sub-frame attachment portion 312. The bottom of the vibration isolator mounting portion 311 extends rearward to form a second subframe connection portion 313. The first subframe connection 312 is assembled to the rail 13. The second subframe connection portion 313 is assembled to the connection portion of the rear cross member 12 and the side member 13, and can improve the mounting strength of the vibration isolator assembly 30, reduce vibration, and improve vibration isolation capability.

The second subframe connecting portions 313 of the pair of vibration isolator assemblies 30 extend toward each other to form a third subframe connecting portion 314. The third sub-frame connection 314 is assembled to the rear cross member 12. The mounting strength of the vibration isolator assembly 30 is further improved, and the vibration isolation effect is enhanced.

In the present embodiment, the first sub-frame connecting portion 312, the second sub-frame connecting portion 313, and the third sub-frame connecting portion 314 are assembled to the sub-frame 10 by bolts. The installation is simple and the dismantlement is convenient, is favorable to the maintenance of later stage. In other embodiments, the first subframe connecting portion 312, the second subframe connecting portion 313, and the third subframe connecting portion 314 may be welded, riveted, or the like to the subframe 10.

As shown in fig. 3, the suspension bracket 33 is provided with a vibration isolator connecting portion 331. The vibration isolator connecting portion 331 is assembled to the second vibration isolator 32 by bolts. In other embodiments, the vibration isolator connecting portion 331 and the second vibration isolator 32 can be assembled by a snap connection or the like.

The vibration isolator connecting portion 331 extends rearward to form a stiffener mounting portion 332. The vibration isolator connecting portion 331 extends forward to form a motor mounting plate 333. The reinforcement mounting portions 332 of the pair of vibration isolator assemblies 30 are assembled to both ends of the reinforcement 40, respectively, so that the dynamic stiffness and natural frequency of the suspension bracket 33 can be improved, vibration can be reduced, vibration isolation capability can be improved, and noise in the high frequency range of the motor can be optimized. Especially, the lateral dynamic stiffness can be improved, and the vibration in the left-right direction can be reduced.

In this embodiment, the reinforcement mounting portion 332 has a cylindrical shape, and a hole is formed in the center thereof. The reinforcement 40 is provided as a rod and is fixed to the reinforcement mounting portion 332 by bolts, and has a simple structure, low manufacturing cost, and high production efficiency. To further improve the production efficiency, both ends of the reinforcing member 40 are flattened to facilitate the installation of bolts.

In other embodiments, the stiffener 40 may be a hollow beam or a complex bracket-like structure. The stiffener 40 may be mounted to any location on the isolator assembly 30 and connects a pair of isolator assemblies 30. The reinforcement 40 and the vibration isolator assembly 30 may be connected by welding, riveting, clamping, etc. The material of the stiffener 40 may be steel or aluminum or plastic, etc. Steel has high strength, plastic has light weight, and aluminum has certain strength and light weight. The material of the stiffener 40 may be selected according to specific strength requirements as well as weight requirements.

A plurality of motor connection parts 334 are provided on the motor mounting plate 333. The motor is connected to the motor mounting hole 21 and the motor connection portion 334. Since the motor mounting plate 333 is formed to extend forward, the distance between the motor connection portion 334 and the motor mounting hole 21 is reduced, and the mounting of a small-sized motor can be accommodated. The installed motor can be a coaxial motor and has the advantages of small size, high power and large torque.

The number of the motor connection parts 334 may be plural. The arrangement of the plurality of motor connection parts 334 may form a triangle. For example, the number of the motor connecting parts 334 is three, so that a triangle is formed, the mounting structure is stable, the mounting strength of the motor can be improved, and the motor vibration is reduced. Wherein, a motor connecting portion 334 can be close to vibration isolator connecting portion 331 and set up, and two motor connecting portions 334 can keep away from vibration isolator connecting portion 331 and be located the upper and lower both sides of motor mounting panel 333 respectively, and the motor passes through the bolt assembly to motor connecting portion 334. In other embodiments, the number and arrangement of the motor connection portions 334 are not limited, and the motor installation strength requirement can be satisfied.

The motor mounting plate 333 is also provided with a reinforcing rib 335. The reinforcing ribs 335 are connected between the motor connecting portions 334, and can improve the strength of the motor mounting plate 333 itself.

In some embodiments, a mass mounting portion 336 may be provided below the vibration isolator connecting portion 331 to raise the natural frequency of the suspension bracket 33 by mounting the mass, avoid the operating frequency, and prevent resonance. The problem of high frequency squeal of the motor can be significantly ameliorated by the co-action with the stiffener 40. Under the condition of meeting the dynamic stiffness condition, the mass block can be omitted, so that the weight is reduced and the cost is saved.

The frame 31 and the suspension bracket 33 are formed by aluminum die casting, are light in weight, and balance natural frequency, dynamic stiffness, and weight. In other embodiments, the material of the frame 31 and the suspension bracket 33 may be steel, alloy, or the like.

The embodiment also provides a vehicle, which comprises the motor suspension structure. Because the motor suspension structure has good vibration isolation performance, the vehicle of the embodiment has good NVH performance and drivability. The vibration of the vehicle is small, and the driving is stable. The noise in the car is less, takes and experiences well. The vehicle of the present embodiment may be a vehicle in which an electric vehicle, a hybrid vehicle, or the like is provided with a power source through a motor.

The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the above-mentioned embodiments without departing from the scope of the present utility model.

Claims (10)

1. A motor suspension structure, comprising: the vibration isolator comprises a subframe, a first vibration isolator and a pair of vibration isolator assemblies, wherein the first vibration isolator is mounted to the front part of the subframe, the pair of vibration isolator assemblies is mounted to the rear part of the subframe, and a reinforcing piece is connected between the pair of vibration isolator assemblies; the vibration isolator assembly comprises a second vibration isolator, and the motor is fixedly connected with the first vibration isolator and the second vibration isolator respectively.

2. The motor suspension structure of claim 1, wherein the isolator assembly further comprises a backbone assembled to the subframe, the second isolator mounted to the backbone, and a suspension bracket comprising an isolator connection assembled to the second isolator.

3. The motor suspension structure according to claim 1, characterized in that the first vibration isolator and the second vibration isolator are provided in a bushing form, and the first vibration isolator and the second vibration isolator are perpendicular to an axis of the second vibration isolator.

4. The motor suspension structure of claim 2, wherein the isolator connecting portion extends rearward to form a stiffener mounting portion, and both ends of the stiffener are assembled to the stiffener mounting portions of the pair of isolator assemblies, respectively.

5. The motor suspension structure according to claim 2, wherein the vibration isolator connecting portion extends forward to form a motor mounting plate, and a plurality of motor connecting portions are provided on the motor mounting plate; the first vibration isolator is provided with a motor mounting hole, and the motor is connected to the motor mounting hole and the motor connecting portion.

6. The motor suspension structure according to claim 5, wherein the number of the motor connecting portions is plural, one motor connecting portion is disposed close to the vibration isolator connecting portion, and two motor connecting portions are disposed away from the vibration isolator connecting portion and are located on upper and lower sides of the motor mounting plate, respectively.

7. The motor suspension structure according to claim 1, wherein the sub-frame includes a front cross member, a rear cross member, and a pair of side members connecting the front cross member and the rear cross member, the vibration isolator assembly being provided with a vibration isolator mounting portion; the first vibration isolator is assembled into the front cross beam, and the second vibration isolator is assembled into the vibration isolator mounting portion.

8. The motor suspension structure according to claim 7, characterized in that a first subframe connecting portion is formed extending forward from a bottom of the vibration isolator mounting portion, a second subframe connecting portion is formed extending rearward from a bottom of the vibration isolator mounting portion, the first subframe connecting portion is assembled to the side member, and the second subframe connecting portion is assembled to a junction of the rear cross member and the side member.

9. The motor suspension structure according to claim 8, characterized in that the second subframe connecting portions of a pair of the vibration isolator assemblies extend toward each other to form a third subframe connecting portion, and the third subframe connecting portion is assembled to the rear cross member.

10. A vehicle, characterized by comprising: the motor suspension structure of any one of claims 1-9.