Double-layer damping rubber sleeve suitable for vacuum pump

Abstract

An upper outer bushing (2) and a lower outer bushing (3) which are arranged up and down are connected to the outer side of an inner bushing (1) through evenly distributed buffer ribs (4), the upper outer bushing (2) and the lower outer bushing (3) are connected through a supporting block (5), the supporting block (5) is fixedly connected with the inner bushing (1), the outer edge diameter of the upper outer bushing (2) is larger than that of the lower outer bushing (3), and the outer edge diameter of the upper outer bushing (2) is larger than that of the lower outer bushing (3). According to the electric vacuum pump, vibration of the vacuum pump can be effectively prevented from being transmitted to a vehicle frame, the service life of the electric vacuum pump can be effectively prolonged, and the driving feeling of a driver can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a shock-absorbing rubber sleeve, in particular to a double-layer shock-absorbing rubber sleeve suitable for a vacuum pump. Background Art

[0002] In recent years, with the rapid development of China's new energy vehicle industry, micro electric vehicles have also been widely recognized by the market. As the core component of micro electric vehicles, the noise and vibration caused by the operation of electric vacuum pumps are widely concerned as important evaluation indicators of the performance of the whole vehicle. The vacuum pump needs to use vibration-damping rubber sleeves to reduce noise and buffer vibration. Therefore, the vibration-damping rubber sleeves play an important role in the vacuum pump. At present, most of the vibration-damping rubber sleeves on the market are solid structures. Since their shock absorption mainly relies on the elasticity of the material itself to achieve the effect of buffering vibration and reducing noise, under the constraints of service life and manufacturing cost, the overall shock absorption effect is unsatisfactory, which in turn affects the service life of the electric vacuum pump and the driving experience of the driver.

[0003] At present, the utility model with patent publication number CN205381111U discloses a front suspension shock-absorbing rubber sleeve, including a shock-absorbing rubber sleeve body, on which a positioning hole is provided, and the shock-absorbing rubber sleeve body is used to be sleeved on the lower arm rubber sleeve to increase the bearing capacity of the lower arm rubber sleeve. It effectively solves the technical problem in the prior art that the lower arm rubber sleeve has poor bearing capacity, which causes cracks or even breaks during use, affecting driving safety. However, the application scheme itself still belongs to a solid rubber sleeve, and cannot solve the problem that the excessive vibration of the vacuum pump affects the driver's driving experience. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a double-layer vibration-damping rubber sleeve suitable for a vacuum pump, which can effectively prevent the vibration of the vacuum pump from being transmitted to the vehicle frame, and can effectively improve the service life of the electric vacuum pump and the driving experience of the driver.

[0005] In order to achieve the above-mentioned purpose, the utility model is suitable for a double-layer vibration-damping rubber sleeve of a vacuum pump, including an inner sleeve, an upper outer sleeve, a lower outer sleeve, buffer ribs, a support block, a vehicle body bracket, a vacuum pump bracket and bolts. The outer side of the inner sleeve is connected to the upper outer sleeve and the lower outer sleeve arranged up and down through evenly distributed buffer ribs, the upper outer sleeve and the lower outer sleeve are connected through a support block, the support block is fixedly connected to the inner sleeve, the outer edge diameter of the upper outer sleeve is larger than the outer edge diameter of the lower outer sleeve, and a groove is formed on the lower surface of the upper outer sleeve, the upper surface of the lower outer sleeve and the outer side of the support block.

[0006] In addition, the double-layer vibration-damping rubber sleeve suitable for a vacuum pump proposed in the above embodiment of the utility model may also have the following additional technical features:

[0007] As a further improvement of the present utility model, the inner bushing, the upper outer bushing, the lower outer bushing, the buffer ribs and the support blocks are all made of EPDM material.

[0008] As a further improvement of the present invention, the inner bushing, the upper outer bushing and the lower outer bushing are located on the same axis.

[0009] As a further improvement of the utility model, the upper end of the inner sleeve protrudes from the upper surface of the upper outer sleeve, and the lower end of the inner sleeve protrudes from the lower surface of the lower outer sleeve.

[0010] Through the above scheme, the utility model has at least the following advantages: compared with the conventional shock-absorbing rubber sleeve, by adding an upper outer sleeve and a lower outer sleeve outside the inner sleeve, as well as buffer ribs and support blocks for supporting the upper outer sleeve and the lower outer sleeve, the vibration of the vacuum pump can be effectively prevented from being transmitted to the frame, which can effectively improve the service life of the electric vacuum pump and the driving experience of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of a double-layer vibration-damping rubber sleeve suitable for a vacuum pump;

[0012] Figure 2 It is a top view of a double-layer vibration-damping rubber sleeve suitable for a vacuum pump;

[0013] Figure 3 It is a cross-sectional view of a double-layer vibration-damping rubber sleeve suitable for a vacuum pump;

[0014] Figure 4 This is a cross-sectional view of the use status of a double-layer vibration-damping rubber sleeve suitable for a vacuum pump;

[0015] In the figure: 1. inner bushing, 2. upper outer bushing, 3. lower outer bushing, 4. buffer rib, 5. support block, 6. body bracket, 7. vacuum pump bracket, 8. bolts. DETAILED DESCRIPTION

[0016] The double-layer vibration-damping rubber sleeve suitable for a vacuum pump of the utility model is described below in conjunction with the accompanying drawings.

[0017] In the first embodiment of the present application, Figures 1 to 3As shown, the double-layer vibration-damping rubber sleeve for vacuum pump (hereinafter referred to as "the present invention") comprises an inner bushing 1, an upper outer bushing 2, a lower outer bushing 3, a buffer rib 4, a support block 5, a vehicle body bracket 6, a vacuum pump bracket 7 and a bolt 8. The outer side of the inner bushing 1 is connected to the upper outer bushing 2 and the lower outer bushing 3 arranged up and down through the uniformly distributed buffer ribs 4. The upper outer bushing 2 and the lower outer bushing 3 are connected through the support block 5. The support block 5 is fixedly connected to the inner bushing 1. The outer edge diameter of the upper outer bushing 2 is larger than the outer edge diameter of the lower outer bushing 3. The lower surface of the upper outer bushing 2, the upper surface of the lower outer bushing 3 and the outer side of the support block 5 form a groove. The inner bushing 1, the upper outer bushing 2 and the lower outer bushing 3 are connected by the structure of the buffer rib 4 and the support block 5. Compared with the solid damping block, this hollow type of damping block reduces the vertical and circumferential stiffness, so that the deformation amplitude of the buffer rib is larger, and more energy of the vibration of the vacuum pump bracket 7 can be absorbed. The vibration is greatly attenuated, which greatly reduces the vibration transmitted to the vehicle body bracket 6 through the bracket. The buffer ribs 4 play a supporting role in the vertical direction. If there is no buffer rib 4, the support block 5 alone has a thin structure and is not strong enough to support the vacuum pump. The buffer ribs 4 are evenly distributed around the circumference, which can make the support stable and the force even.

[0018] The utility model publication number is CN205381111U for the front suspension shock-absorbing rubber sleeve (hereinafter referred to as "the patent"). However, the application scheme itself is still a solid rubber sleeve and cannot solve the problem that the excessive vibration of the vacuum pump affects the driver's driving experience. The present invention uses an upper outer sleeve 2 and a lower outer sleeve 3 to the outside of the inner sleeve 1, as well as a buffer rib 4 and a support block 5 for supporting the upper outer sleeve 2 and the lower outer sleeve 3, which can effectively prevent the vibration of the vacuum pump from being transmitted to the frame, and can effectively improve the service life of the electric vacuum pump and the driver's driving experience.

[0019] In order to further optimize the working efficiency of the present application and improve the overall durability of the inner bushing 1, the upper outer bushing 2, the lower outer bushing 3, the buffer rib 4 and the support block 5, the inner bushing 1, the upper outer bushing 2, the lower outer bushing 3, the buffer rib 4 and the support block 5 are all made of EPDM material. The inner bushing 1, the upper outer bushing 2 and the lower outer bushing 3 are on the same axis, the upper end of the inner bushing 1 protrudes from the upper surface of the upper outer bushing 2, and the lower end of the inner bushing 1 protrudes from the lower surface of the lower outer bushing 3. The vacuum pump is connected to the upper outer bushing 2 and the lower outer bushing 3 through the vacuum pump bracket 7, and the inner bushing 1 is connected to the vehicle body bracket 6 through the bolt 8. The two play a role in vibration reduction and noise reduction through the buffer rib 4 and the support block 5. Therefore, the vacuum pump drives the upper outer bushing 2 and the lower outer bushing 3 to change relative positions with the inner bushing 1. The design length of the inner bushing 1 is greater than that of the upper and lower outer bushings, which can provide sufficient buffer space for the change.

[0020] When using, install the double-layer vibration-damping rubber sleeve suitable for the vacuum pump, such as Figure 4As shown, the present invention is pre-assembled to the opening of the vacuum pump bracket 7, the opening of the vacuum pump bracket 7 is smaller than the vibration-damping rubber sleeve, and the outer dimensions of the lower outer bushing 3 are reduced by the elastic deformation of the vibration-damping rubber sleeve so as to be assembled into the bracket vacuum pump bracket 7. At the same time, the upper outer bushing should have a sufficient size to cooperate with the vacuum pump bracket 7 to avoid the bushing being vertically vibrated and falling out of the bracket opening during vibration. Then, a bolt 8 is inserted from the upper part of the inner bushing 1 into the screw hole reserved for connecting the vehicle body bracket 6.

[0021] In summary, the double-layer vibration-damping rubber sleeve suitable for a vacuum pump in the embodiment of the utility model can effectively prevent the vibration of the vacuum pump from being transmitted to the vehicle frame by adding an upper outer sleeve 2 and a lower outer sleeve 3 outside the inner sleeve 1, as well as a buffer rib 4 and a support block 5 for supporting the upper outer sleeve 2 and the lower outer sleeve 3, thereby effectively improving the service life of the electric vacuum pump and the driving experience of the driver.

[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer vibration-damping rubber sleeve suitable for a vacuum pump, comprising an inner sleeve (1), a vehicle body bracket (6), a vacuum pump bracket (7) and a bolt (8), characterized in that: The outer side of the inner bushing (1) is connected to an upper outer bushing (2) and a lower outer bushing (3) arranged up and down through evenly distributed buffer ribs (4), the upper outer bushing (2) and the lower outer bushing (3) are connected through a support block (5), the support block (5) is fixedly connected to the inner bushing (1), the outer edge diameter of the upper outer bushing (2) is larger than the outer edge diameter of the lower outer bushing (3), and a groove is formed on the lower surface of the upper outer bushing (2), the upper surface of the lower outer bushing (3) and the outer side of the support block (5).

2. The double-layer vibration-damping rubber sleeve suitable for a vacuum pump according to claim 1, characterized in that: The inner bushing (1), the upper outer bushing (2), the lower outer bushing (3), the buffer ribs (4) and the support block (5) are all made of EPDM material.

3. The double-layer vibration-damping rubber sleeve suitable for a vacuum pump according to claim 2, characterized in that: The inner bushing (1), the upper outer bushing (2) and the lower outer bushing (3) are located on the same axis.

4. The double-layer vibration-damping rubber sleeve suitable for a vacuum pump according to claim 1, characterized in that: The upper end of the inner sleeve (1) protrudes from the upper surface of the upper outer sleeve (2), and the lower end of the inner sleeve (1) protrudes from the lower surface of the lower outer sleeve (3).

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