A shock-absorbing bracket structure for an electric compressor

Abstract

The present invention relates to the field of shock absorption technology for automobile air-conditioning compressors, and specifically discloses a shock-absorbing bracket structure for an electric compressor. The shock-absorbing bracket structure includes: a first positioning assembly for mounting the electric compressor; a first connecting assembly disposed on the first positioning assembly; a second positioning assembly for connecting to a vehicle body; a second connecting assembly disposed on the second positioning assembly; and a shock-absorbing member elastically connected between the first connecting assembly and the second connecting assembly, with the first positioning assembly suspended from the second connecting assembly via the first connecting assembly and the shock-absorbing member, and a clearance space being provided between the first positioning assembly and the second positioning assembly. The shock-absorbing bracket structure is low-cost, facilitates the use of large-sized shock-absorbing members, improves shock absorption, and meets NVH performance requirements.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air-conditioning compressor vibration reduction, in particular to a vibration reduction bracket structure for an electric compressor. Background Art

[0002] Under the dual pressures of energy and environmental protection, new energy vehicles have become the mainstream of industry development. When the air conditioner is activated in pure EV mode, the lack of engine background noise, coupled with the increased upper speed limit of the electric compressor caused by the addition of a low-temperature heat pump and vehicle-wide super-fast charging, exacerbates vehicle NVH. Data shows that NVH issues with the air conditioner activated have become a major customer complaint, necessitating urgent design solutions to mitigate and optimize the issue.

[0003] There are generally two approaches to arranging electric compressors in new energy vehicles. One approach involves connecting the electric compressor to the front motor or engine via a rigid bracket, using a shared dynamic main mount to achieve vibration damping. For example, patent document (China Patent Publication No. CN211599397U) discloses a vehicle with an electric compressor mounting bracket with a shock-absorbing structure. The bracket acts as a shared dynamic main mount, and the electric compressor is suspended on the bracket via a shock-absorbing device, minimizing contact with the bracket. The other approach involves connecting the electric compressor to the front cabin chassis or body components via a separately designed shock-absorbing bracket, using a built-in shock-absorbing structure (rubber bushings or springs) to attenuate vibrations within the electric compressor. For example, patent document (China Patent Publication No. CN216741905U) discloses a shock-absorbing structure for an electric compressor, which includes a shock-absorbing sleeve and rubber sleeve for vibration damping. As a key component in optimizing the NVH performance of electric compressors, the design of the compressor shock-absorbing bracket requires careful consideration. Considering vehicle cost targets, rubber bushing shock-absorbing structures are generally used for mid- and low-end vehicles. High-end vehicles generally use a single-stage spring shock-absorbing structure. Each automaker chooses the appropriate shock absorption form based on the vehicle positioning, taking into account NVH performance, cost, and weight target factors.

[0004] In the industry, shock-absorbing brackets that use rubber bushings for vibration isolation are generally divided into two types: single-stage and double-stage. The isolation rate of the double-stage shock-absorbing bracket can generally reach more than 30dB, while the isolation rate of the single-stage shock-absorbing bracket can reach more than 20dB. However, the double-stage shock-absorbing bracket (a first-stage shock-absorbing device is set between the first-stage bracket and the electric compressor for first-stage vibration reduction, and a second-stage shock-absorbing device is used between the two-stage brackets for vibration reduction) has a more complex bracket structure design because the number of shock-absorbing devices such as rubber bushings is doubled, resulting in an increase in the cost of the entire vehicle. Generally, the cost of a double-stage shock-absorbing bracket is more than 1.5 times that of a single-stage shock-absorbing bracket. In order to achieve a relatively high isolation rate, the single-stage rubber shock-absorbing bracket generally needs to make the bushing relatively soft, that is, the dynamic and static stiffness of the bushing in the X / Y / Z directions should be low. However, the softer the bushing, the worse its own durability. In particular, for rubber bushings with smaller sizes, it is impossible to achieve its own durability while meeting a higher level of isolation rate. Summary of the Invention

[0005] The purpose of the present invention is to provide a shock-absorbing bracket structure for an electric compressor, which can provide a large-sized shock-absorbing component, improve the shock-absorbing effect and take into account the NVH performance requirements, while the shock-absorbing bracket has a low cost.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A shock-absorbing support structure for an electric compressor, comprising:

[0008] a first positioning assembly, the first positioning assembly being used for mounting the electric compressor;

[0009] a first connecting component, the first connecting component being disposed on the first positioning component;

[0010] a second positioning assembly, the second positioning assembly being configured to be connected to the vehicle body;

[0011] a second connecting component, the second connecting component being disposed on the second positioning component;

[0012] A shock-absorbing member is elastically connected between the first connecting component and the second connecting component, and the first positioning component is suspended on the second connecting component through the first connecting component and the shock-absorbing member. There is an avoidance space between the first positioning component and the second positioning component, and the avoidance space is used to avoid elastic vibration of the shock-absorbing member.

[0013] In a further solution, the first connecting component includes a first flange plate arranged on both sides of the first positioning component, and the second connecting component includes a second flange plate arranged on both sides of the second positioning component. The first flange plate and the second flange plate correspond to each other, and the first flange plate and the second flange plate are connected by a shock absorber.

[0014] In a further solution, a first connecting hole is provided on the first flange plate, a second connecting hole is provided on the second flange plate, and the shock absorbing member is installed in the first connecting hole and the second connecting hole through a bolt assembly.

[0015] In a further solution, the shock absorber includes a rubber bushing, a bushing outer tube and a bushing inner tube, the bushing inner tube is arranged in the rubber bushing, the bushing outer tube is connected to the outside of the rubber bushing, the bushing outer tube and the rubber bushing are elastically connected, the bushing outer tube is connected to the second connecting hole, the bushing inner tube and the first connecting hole are inserted with a bolt assembly, the bushing outer tube is used to be pressed into the second connecting hole, and the bushing inner tube and the first connecting hole are used to insert the bolt assembly.

[0016] In a further solution, the rubber bushing, the bushing outer tube and the bushing inner tube are formed into one body, the diameter of the rubber bushing is ≥45 mm, and the thickness of the rubber bushing is ≥25 mm.

[0017] In a further solution, the number of the shock absorbers is three, the axes of the three bushing inner tubes are connected to form a triangle, and the distance between the plane where the three axes are located and the center of mass of the electric compressor is ≤10mm.

[0018] In a further solution, the first positioning assembly includes a first ear seat, a second ear seat and a first base plate, the first connecting assembly is connected to the first base plate, the first base plate is provided with an avoidance groove for avoiding the electric compressor, the first ear seat and the second ear seat are connected to the first base plate in sequence, and the first ear seat and the second ear seat are both provided with mounting holes, and the mounting holes are used for installing the electric compressor.

[0019] In a further solution, the first ear seat includes an arc-shaped protective cover, and the arc-shaped protective cover is used to protect the electric compressor.

[0020] In a further solution, a projection welding nut is provided on one side of the mounting hole, and the projection welding nut is used to cooperate with the long bolt to mount the electric compressor.

[0021] In a further solution, the second positioning assembly includes a second base plate, the second connecting assembly is connected to the second base plate, and the second base plate is provided with a positioning hole, and the positioning hole is used to connect to the vehicle body.

[0022] Beneficial effects of the present invention:

[0023] The present invention adds a first connecting component and a second connecting component for connecting the shock absorber, which is equivalent to extending the existing positioning mounting seat for installing the electric compressor, making it easier to install larger shock absorbers and arrange the shock absorbers. Compared with smaller shock absorbers, larger shock absorbers have better shock absorption effect and better vibration resistance. In addition, through the shock absorber and the first connecting component, the first positioning component can be suspended on the shock absorber together with the electric compressor, so that the shock absorber can absorb the vibration caused by the electric compressor to a greater extent. Therefore, the new shock-absorbing bracket structure is not only simple in structure, but also can facilitate the provision of larger shock absorbers and the installation of the larger shock absorbers while taking into account the NVH performance requirements, saving the number of shock absorbers required, and has good energy absorption and a better isolation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram showing the connection between an electric compressor shock-absorbing bracket structure, an electric compressor, and a vehicle body according to an embodiment of the present invention;

[0026] Figure 2 The figure is a schematic diagram of the connection between an electric compressor shock-absorbing bracket structure and a vehicle body in an embodiment of the present invention.

[0027] In the figure: 01, electric compressor; 02, vehicle body; 1, first positioning assembly; 11, first ear seat; 111, avoidance groove; 12, second ear seat; 13, first base plate; 14, mounting hole; 15, projection welding nut; 2, first connecting assembly; 21, first flange plate; 211, first connecting hole; 3, second positioning assembly; 31, second base plate; 311, positioning hole; 4, second connecting assembly; 41, second flange plate; 411, second connecting hole; 5, shock absorber; 51, rubber bushing; 52, bushing outer tube; 53, bushing inner tube; 6, avoidance space. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] like Figure 1 As shown, a shock-absorbing bracket structure for an electric compressor includes:

[0030] A first positioning assembly 1, the first positioning assembly 1 is used to install the electric compressor 01;

[0031] A first connecting component 2, the first connecting component 2 is arranged on the first positioning component 1;

[0032] A second positioning component 3, the second positioning component 3 is used to connect with the vehicle body 02;

[0033] A second connecting component 4, the second connecting component 4 is arranged on the second positioning component 3;

[0034] The shock absorber 5 is elastically connected between the first connecting component 2 and the second connecting component 4. If the first connecting component 2 and the second connecting component 4 are both hung on the shock absorber 5, the shock absorber 5 itself has circumferential elasticity, and the first positioning component 1 is suspended on the second connecting component 4 through the first connecting component 2 and the shock absorber 5. There is an avoidance space 6 between the first positioning component 1 and the second positioning component 3, and the avoidance space 6 is used to avoid the elastic vibration of the shock absorber 5.

[0035] Its working principle is: by adding a first connecting component 2 and a second connecting component 4 for connecting the shock absorber 5, it is equivalent to extending the existing positioning mounting seat for installing the electric compressor 01, which is convenient for installing larger shock absorbers and facilitating the arrangement of large-sized shock absorbers. Compared with small-sized shock absorbers, large-sized shock absorbers have better shock absorption effect on the electric compressor 01 and better durable vibration effect. In addition, through the shock absorber 5 and the first connecting component 2, the first positioning component 1 can be suspended on the shock absorber 5 together with the electric compressor 01, so that the shock absorber 5 can absorb the vibration caused by the electric compressor 01 to a greater extent. Therefore, the new shock-absorbing bracket structure is not only simple in structure, but also convenient for the installation of the larger-sized shock absorber and providing a larger-sized shock absorber while taking into account the NVH performance requirements, which can save the number of shock absorbers required, has good energy absorption, and a better isolation rate. Generally, the isolation rate can reach more than 30dB.

[0036] According to the above working principle, the preferred implementation structure is as follows: Figure 1 and Figure 2As shown, the first connecting assembly 2 includes first flange plates 21 disposed on either side of the first positioning assembly 1, and the second connecting assembly 4 includes second flange plates 41 disposed on either side of the second positioning assembly 3. The first and second flange plates 21 and 41 correspond to each other and are connected by a shock absorber 5. The first and second flange plates 21 and 41 have a simple structure, making them easy to process for connection to the shock absorber 5. The first positioning assembly 1 and the first flange plate 21 can be a single-piece sheet metal structure, with the first flange plate 21 folded onto both sides of the first positioning assembly 1. The second positioning assembly 3 and the second flange plate 41 can be a single-piece casting structure, with the second flange plate 41 connected to both sides of the second positioning assembly 3. Three flange plates 41 can be cast. Of course, other processes can also be used to produce the above structure, which will not be detailed here.

[0037] like Figure 2 As shown, the first flange plate 21 and the second flange plate 41 are respectively provided with a first connection hole 211 and a second connection hole 411 for mounting the shock absorber 5. The shock absorber 5 is mounted in the first connection hole 211 and the second connection hole 411 by a bolt assembly. The bolt assembly here can be a bushing connection bolt and a nut, and the nut is welded to one side of the first connection hole, which facilitates the detachable connection of the shock absorber 5.

[0038] like Figure 1 and Figure 2As shown, the shock absorber 5 includes a rubber bushing 51, a bushing outer tube 52 and a bushing inner tube 53. The bushing inner tube 53 is arranged in the rubber bushing 51, and the bushing outer tube 52 is connected to the outside of the rubber bushing 51. The bushing outer tube 52 and the rubber bushing 51 are elastically connected. The bushing outer tube 52 is used to be pressed into the second connecting hole 411, and the bushing inner tube 53 and the first connecting hole 211 are used to insert the bolt assembly. In this way, the second connecting hole 411 can be made very large, such as about 50mm, which is convenient for pressing in large-sized shock-absorbing parts, such as 50mm large-sized shock-absorbing parts. Compared with the existing shock-absorbing bushings, when installing, their mounting holes are mostly set on the mounting holes of the electric compressor 01, or connected to the mounting holes of the mounting base that has not been extended. The existing mounting holes are mostly used for the installation and positioning of the electric compressor 01. Due to the size limitations of the electric compressor 01 and the mounting base itself, it is too costly to change the size of the electric compressor 01 when resuming production. Therefore, the mounting hole cannot be made very large. A smaller shock-absorbing bushing is used to be sleeved on the screw and locked on the mounting hole by the screw. The smaller bushing's isolation rate itself is worse than that of the large-sized shock-absorbing parts. In addition, the rubber bushing 51 can be made of rubber that has been adjusted to meet the stiffness requirements and can be made into a large-sized shock-absorbing part. The large-sized rubber bushing 5 is easy to make soft, that is, the dynamic / static stiffness is reduced to a lower level. The bushing outer tube 52 is pressed into the second connecting hole 411 to elastically support and lock the first connecting component 2. The bushing inner tube 53 can be made of steel inner tube, which is more wear-resistant and convenient for the installation of the bolt assembly.

[0039] The rubber bushing 51, the bushing outer tube 52 and the bushing inner tube 53 are formed into one piece, which can be formed into one piece by vulcanization. The diameter of the rubber bushing 51 is ≥45mm, and the thickness of the rubber bushing 51 is ≥25mm. The preferred rubber bushing 51 has a diameter of about 50mm and a thickness of 30mm.

[0040] There are three shock absorbers 5, and the axes of the three bushing inner tubes 53 are connected in a triangle, with the distance between the three axes and the center of mass of the electric compressor 01 in the plane being ≤10mm. This not only stabilizes the electric compressor 01, but also reduces the amplitude of the electric compressor 01.

[0041] like Figure 2 As shown, the first positioning assembly 1 includes a first ear seat 11, a second ear seat 12, and a first base plate 13. The first connecting assembly 2 is connected to the first base plate 11. The first base plate 11 is provided with a clearance groove 111 for avoiding the electric compressor 01. The first ear seat 11 and the second ear seat 12 are connected to the first base plate 13 in sequence. The first ear seat 11 and the second ear seat 12 are both provided with mounting holes 14 for mounting the electric compressor 01. The number of mounting holes 14 can be three, so that the electric compressor 01 can be well suspended on the second connecting assembly 4, forming a clearance space 6 for the elastic vibration of the shock absorber 5.

[0042] like Figure 1 As shown, the first ear seat 11 includes an arc-shaped protective cover, which is used to protect the electric compressor 01. This can protect the electric compressor 01.

[0043] like Figure 2 As shown, a projection welding nut 15 is provided on one side of the mounting hole 14, and the projection welding nut 15 is used to cooperate with the long bolt to install the electric compressor 01. This facilitates the detachable connection of the electric compressor 01.

[0044] like Figure 1 and Figure 2 As shown, the second positioning assembly 3 includes a second base plate 31, and the second connecting assembly 4 is connected to the second base plate 31. The second base plate 31 is provided with positioning holes 311, which are used to connect to the vehicle body 02. The number of positioning holes 311 can be three, which facilitates detachable connection with the vehicle body 02 via bolts and spring washers.

[0045] The first flange plate 21 , the first ear seat 11 , the second ear seat 12 and the first bottom plate 13 can be integrally formed by sheet metal, and then the three projection welding nuts 2 are welded to the mounting holes 14 .

[0046] The second bottom plate 31 and the second flange plate 41 are integrally formed by die-casting and machining processes and can be made of aluminum alloy material;

[0047] This shock-absorbing bracket structure is suitable for new energy vehicles where the electric compressor 01 is installed on a non-motor vehicle.

[0048] During specific installation and use, the electric compressor 01 can be inserted into the first ear seat 11 and the second ear seat 12 with a corresponding number of mounting holes 14 through three long bolts, and threadedly connected to the convex welding nut 15. The rubber bushing 3 is combined with the rubber bushing outer tube 4 and the rubber bushing inner tube 10 through a vulcanization process, and then pressed into the second connecting hole 411, and connected to the first flange plate 21 and the second flange plate 41 through the bushing connecting bolts. The second base plate 31 is fixed to the vehicle body or chassis through three through holes.

[0049] Throughout this specification, reference to terms such as "one embodiment," "example," or "specific example" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] It should be noted that the terms "first", "second" etc. in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the application described herein. In this application, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the directions or positional relationships shown in the accompanying drawings.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A shock-absorbing bracket structure for an electric compressor, characterized in that: The shock-absorbing support structure includes: A first positioning component (1), a first connecting component (2), a second positioning component (3), a second connecting component (4) and a shock absorbing component (5), wherein the first connecting component (2) is arranged on the first positioning component (1), the second connecting component (4) is arranged on the second positioning component (3), the shock absorbing component (5) is elastically connected between the first connecting component (2) and the second connecting component (4), and the first positioning component (1) is suspended on the second connecting component (4) through the first connecting component (2) and the shock absorbing component (5), and an avoidance space (6) is provided between the first positioning component (1) and the second positioning component (3); The first positioning assembly (1) comprises a first ear seat (11), a second ear seat (12) and a first base plate (13); the first connecting assembly (2) is connected to the first base plate (13); a avoidance groove (111) is provided on the first base plate (13); the first ear seat (11) and the second ear seat (12) are connected to the first base plate (13) in sequence; and the first ear seat (11) and the second ear seat (12) are both provided with mounting holes (14); The first ear seat (11) includes an arc-shaped protective cover; The first flange plate (21), the first ear seat (11), the second ear seat (12) and the first bottom plate (13) are integrally formed of sheet metal; Through the shock absorbing member (5) and the first connecting assembly (2), the first positioning assembly (1) and the electric compressor (01) can be suspended on the shock absorbing member (5); The first connecting assembly (2) includes a first flange plate (21) provided on both sides of the first positioning assembly (1), and the second connecting assembly (4) includes a second flange plate (41) provided on both sides of the second positioning assembly (3), the first flange plate (21) and the second flange plate (41) corresponding to each other, and the first flange plate (21) and the second flange plate (41) are connected via a shock absorbing member (5); The shock absorbing member (5) is arranged on a side surface of the first positioning assembly (1); The shock absorbing member (5) comprises a rubber bushing (51), a bushing outer tube (52) and a bushing inner tube (53), wherein the rubber bushing 51, the bushing outer tube 52 and the bushing inner tube 53 are formed into one body; There are three shock-absorbing parts (5), and the axial connection of the three bushing inner tubes (53) forms a triangle.

2. The electric compressor shock-absorbing bracket structure according to claim 1, characterized in that: The first flange plate (21) is provided with a first connecting hole (211), the second flange plate (41) is provided with a second connecting hole (411), and the shock absorbing member (5) is installed in the first connecting hole (211) and the second connecting hole (411) via a bolt assembly.

3. The electric compressor shock-absorbing bracket structure according to claim 2, characterized in that: The bushing inner tube (53) is arranged in the rubber bushing (51), the bushing outer tube (52) is connected to the outside of the rubber bushing (51), the bushing outer tube (52) and the rubber bushing (51) are elastically connected, the bushing outer tube (52) is connected to the second connecting hole (411), and a bolt assembly is inserted into the bushing inner tube (53) and the first connecting hole (211).

4. The electric compressor shock-absorbing bracket structure according to claim 3, characterized in that: The diameter of the rubber bushing (51) is ≥45 mm, and the thickness of the rubber bushing (51) is ≥25 mm.

5. The electric compressor shock-absorbing bracket structure according to claim 1, characterized in that: A projection welding nut (15) is provided on one side of the mounting hole (14).

6. The electric compressor shock absorbing bracket structure according to any one of claims 1 to 4, characterized in that: The second positioning assembly (3) comprises a second base plate (31), the second connecting assembly (4) is connected to the second base plate (31), and a positioning hole (311) is provided on the second base plate (31).

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