阅读说明：本技术 一种电动汽车动力总成悬置用衬套及悬置系统 (Bushing for suspension of electric automobile power assembly and suspension system ) 是由 陈颜 龚颖强 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种电动汽车动力总成悬置用衬套,包括芯轴、外套管、以及连接于芯轴和外套管之间的橡胶主簧,所述橡胶主簧包括多个围绕芯轴外轮廓间隔布置的主体部,所述主体部的至少一侧设有延伸部,所述延伸部的端面与所述主体部的端面形成阶梯结构。本发明进一步公开了一种包含上述衬套的电动汽车动力总成悬置系统。本发明具有结构简单、紧凑,易于加工制造,具有较低的高频动刚度且可避免高频噪声风险等优点。(The invention discloses a bushing for suspending an electric automobile power assembly, which comprises a mandrel, an outer sleeve and a rubber main spring connected between the mandrel and the outer sleeve, wherein the rubber main spring comprises a plurality of main body parts arranged around the outer contour of the mandrel at intervals, at least one side of each main body part is provided with an extension part, and the end surface of each extension part and the end surface of each main body part form a stepped structure. The invention further discloses an electric automobile power assembly suspension system comprising the bushing. The invention has the advantages of simple and compact structure, easy processing and manufacturing, lower high-frequency dynamic stiffness, capability of avoiding high-frequency noise risk and the like.)

1. The utility model provides a bush for suspension of electric automobile power assembly, includes dabber (1), outer tube (2) and connects rubber main spring (3) between dabber (1) and outer tube (2), its characterized in that: the rubber main spring (3) comprises a plurality of main body parts (31) which are arranged around the outer contour of the mandrel (1) at intervals, an extending part (32) is arranged on at least one side of each main body part (31), and the end face (4) of each extending part (32) and the end face (4) of each main body part (31) form a stepped structure.

2. The bushing for suspending the powertrain of the electric vehicle as set forth in claim 1, wherein: the main rubber spring (3) further comprises an inner connecting ring (33) and an outer connecting ring (34), and the main body portion (31) is connected between the inner connecting ring (33) and the outer connecting ring (34).

3. The bushing for suspending the powertrain of the electric vehicle as set forth in claim 2, wherein: the extension (32) is connected with the inner connection ring (33); or the extension (32) is connected with the outer connecting ring (34); or both the inner connection ring (33) and the outer connection ring (34) are connected to the extension portion (32).

4. The bushing for suspending the powertrain of the electric vehicle as set forth in claim 1, wherein: the main body part of the mandrel (1) is circular, and the main body parts (31) are uniformly arranged along the circumferential direction of the mandrel (1).

5. The bushing for suspension of an electric vehicle powertrain according to any one of claims 1 to 4, characterized in that: the mandrel (1) and the outer sleeve (2) are connected through the rubber main spring (3) in a vulcanization mode.

6. The bushing for suspension of an electric vehicle powertrain according to any one of claims 1 to 4, characterized in that: the axis of the mandrel (1) is coincident with or parallel to the axis of the outer sleeve (2).

7. The utility model provides an electric automobile power assembly suspension system which characterized in that: the bushing for suspending the power unit of the electric vehicle according to any one of claims 1 to 6.

Technical Field

The invention relates to an electric automobile, in particular to a bushing for suspending an electric automobile power assembly and a suspension system.

Background

Compared with a traditional fuel vehicle, the torque of the motor of the pure electric vehicle can rapidly exceed 1000 Nm in a very short time, and the excitation frequency of the motor to a suspension system can also reach thousands of hertz due to high rotating speed. The existing bushing for the power assembly suspension is a rubber suspension bushing or a hydraulic suspension bushing, the defect of high-frequency dynamic hardening is difficult to overcome, and the dynamic stiffness of the suspension can be rapidly increased at a high frequency, so that the vibration isolation capability of the suspension bushing is rapidly reduced, and even the vibration isolation capability is lost. Along with the gradual popularization of electric automobiles, the high-frequency vibration isolation requirement of the motor power assembly of the electric automobile is more and more prominent. In order to solve the problem of high-frequency vibration isolation, the current main technical route comprises: 1) the vibration absorption layer is added on the rubber main spring, so that the high-frequency dynamic stiffness of the bushing in the 800-plus-3000 Hz frequency range is obviously reduced, the vibration isolation performance of the whole bushing is improved, but the risk of high-frequency noise caused by the addition of the vibration absorption layer exists; 2) through short cantilever, the light weight of suspension structure among the suspension system, reach the effect that suspension structure high mode and be difficult for resonance to this improves whole car NVH performance, but not arbitrary suspension point of arbitrary suspension system, the condition that can both provide convenience realizes ideal suspension structure.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the bushing for suspending the power assembly of the electric automobile, which has the advantages of simple and compact structure, easiness in processing and manufacturing, lower high-frequency dynamic rigidity and capability of avoiding the risk of high-frequency noise.

The invention further provides a suspension system comprising the bushing.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides an electric automobile power assembly is bush for suspension, includes dabber, outer tube and connects the rubber main spring between dabber and outer tube, the rubber main spring includes a plurality of main parts around dabber outline interval arrangement, at least one side of main part is equipped with the extension, the terminal surface of extension with the terminal surface of main part forms the stair structure.

As a further improvement of the above technical solution: the main rubber spring further includes an inner connection ring and an outer connection ring, and the main body is connected between the inner connection ring and the outer connection ring.

As a further improvement of the above technical solution: the extension part is connected with the inner connecting ring; or the extension part is connected with the outer connecting ring; or both the inner and outer connection rings are connected to the extension.

As a further improvement of the above technical solution: the main body part of the mandrel is circular, and the main body parts are uniformly arranged along the circumferential direction of the mandrel.

As a further improvement of the above technical solution: the mandrel and the outer sleeve are connected through the rubber main spring in a vulcanization mode.

As a further improvement of the above technical solution: the axis of the mandrel is coincident with or parallel to the axis of the outer sleeve.

An electric automobile power assembly suspension system, includes foretell electric automobile power assembly bush for suspension.

Compared with the prior art, the invention has the advantages that: the invention discloses a bushing for suspending an electric automobile power assembly, wherein a rubber main spring comprises a plurality of main body parts which are arranged around the outer contour of a mandrel at intervals, and an extension part which is in a stepped structure with the main body parts is arranged on the side edge of the main body part of the rubber main spring, so that the bushing is easy to process and manufacture; compared with the additional vibration absorption layer in the prior art, the extension part extends from the rubber main body part, so that the stability is better, and the risk of generating high-frequency noise is basically avoided; and the extension part is positioned in the gap between the two adjacent main body parts, so that the volume of the rubber main spring cannot be additionally increased, the structure is compact, and the rubber main spring is conveniently applied to suspension points of various suspension systems.

The electric automobile power assembly suspension system disclosed by the invention comprises the bushing, so that the advantages are also achieved.

Drawings

FIG. 1 is a schematic structural view showing a disassembled state of a bushing for suspending an electric vehicle powertrain according to the present invention.

FIG. 2 is a schematic view of the assembled state of the bushing for suspending the powertrain of the electric vehicle according to the present invention.

FIG. 3 is an axial cross-sectional view of the bushing for suspending the powertrain of the electric vehicle of the present invention.

Fig. 4 is a partially enlarged view of the bushing for suspending the powertrain of the electric vehicle according to the present invention.

FIG. 5 is a schematic structural diagram of another embodiment of the bushing for suspending the powertrain of the electric vehicle according to the present invention.

FIG. 6 is a schematic view of the dynamic stiffness curve of the bushing for suspending the powertrain of the electric vehicle according to the present invention.

The reference numerals in the figures denote: 1. a mandrel; 2. an outer sleeve; 3. a rubber main spring; 31. a main body portion; 32. an extension portion; 33. an inner connecting ring; 34. an outer connecting ring; 4. an end face.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

Fig. 1 to 4 show an embodiment of a bushing for suspending an electric vehicle powertrain according to the present invention, which includes a mandrel 1, an outer sleeve 2, and a rubber main spring 3 connected between the mandrel 1 and the outer sleeve 2, wherein the rubber main spring 3 includes a plurality of main body portions 31 arranged at intervals around an outer contour of the mandrel 1, at least one side of the main body portion 31 is provided with an extending portion 32, an end surface 4 of the extending portion 32 and an end surface 4 of the main body portion 31 form a stepped structure, or along an axial direction of the mandrel 1, a length of the extending portion 32 is shorter than that of the main body portion 31; or extension 32, is located between the two end faces 4 of the body 31. The axis of the mandrel 1 coincides with or is parallel to the axis of the outer sleeve 2, or the mandrel and the outer sleeve can be coaxially arranged or eccentrically arranged.

According to the bushing for suspending the power assembly of the electric automobile, the rubber main spring 3 comprises a plurality of main body parts 31 which are arranged around the outer contour of the mandrel 1 at intervals, at least one side of the main body part 31 of the rubber main spring 3 is provided with the extension part 32 which is in a stepped structure with the main body part 31, and the bushing is easy to process and manufacture, and a test shows that compared with the existing bushing, the structure can reduce the high-frequency dynamic stiffness of the bushing and improve the high-frequency vibration isolation performance of the bushing; compared with the additional vibration absorption layer in the prior art, the extension part 32 extends from the rubber main body part 31, so that the stability is better, and the risk of generating high-frequency noise is basically avoided; and the extension part 32 is positioned in the gap between two adjacent main body parts 31, so that the volume of the rubber main spring 3 is not additionally increased, the structure is compact, and the suspension system is conveniently applied to suspension points of various suspension systems.

Further, in the present embodiment, the rubber main spring 3 further includes an inner connection ring 33 and an outer connection ring 34, and the main body portion 31 is connected between the inner connection ring 33 and the outer connection ring 34. The main body portions 31 may be integrally connected by the inner connection ring 33 and the outer connection ring 34, and as a preferred embodiment, when the main body portion of the spindle 1 is circular, the plurality of main body portions 31 are uniformly arranged in the circumferential direction of the spindle 1, so that the characteristics of the rubber main spring 3 are uniform in all the circumferential directions.

In the present embodiment, the inner connecting ring 33 and the outer connecting ring 34 are connected and fused with the extension 32, so that the dynamic characteristics of the main rubber spring 3 are stable. Referring to fig. 5, of course, in other embodiments, the extension 32 may be connected to only the inner connection ring 33; or the extension 32 is connected only to the outer connecting ring 34.

As a preferred technical scheme, the mandrel 1 and the outer sleeve 2 are connected through a rubber main spring 3 in a vulcanization mode.

The electric automobile power assembly suspension system of this embodiment includes above-mentioned bush for electric automobile power assembly suspension.

The electric automobile power assembly suspension system comprises the bushing, and therefore the advantages of the bushing are also achieved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.