CN210949671U - Noise reduction device of power-assisted vacuum pump of electro-hydraulic hybrid braking system - Google Patents
Noise reduction device of power-assisted vacuum pump of electro-hydraulic hybrid braking system Download PDFInfo
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- CN210949671U CN210949671U CN201921942306.3U CN201921942306U CN210949671U CN 210949671 U CN210949671 U CN 210949671U CN 201921942306 U CN201921942306 U CN 201921942306U CN 210949671 U CN210949671 U CN 210949671U
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Abstract
The utility model discloses a noise reduction device of an electric-hydraulic hybrid braking system booster vacuum pump, which belongs to the technical field of new energy vehicle braking systems, and comprises a vacuum pump and a mounting plate fixedly connected with the lower surface of a frame vacuum pump, wherein the frame is provided with four positioning holes, the mounting plate is provided with four through holes at opposite positions, each positioning hole and each through hole are correspondingly provided with a damping device, each damping device comprises a piston and a piston rod, the piston divides the first oil cylinder into a first oil cavity and a second oil cavity, the inner wall of the second oil cylinder and the outer wall of the first oil cylinder form a third oil cavity, hydraulic oil is filled in the first oil cavity, the second oil cavity and the third oil cavity, a plurality of first through holes are formed in the piston, the first through holes are communicated with the first oil cavity and the second oil cavity, a plurality of second through holes are formed in the first oil cylinder, and the second through holes are communicated with the second oil cavity and the third oil cavity. Through the scheme, the transmission of the noise of the vacuum pump is reduced.
Description
Technical Field
The utility model belongs to the technical field of new forms of energy car braking system, especially, relate to an electricity liquid hybrid brake system helping hand vacuum pump's noise reduction device.
Background
The vacuum boosting effect of the braking system is related to the running safety of the automobile. In the brake boosting system of the automobile, the boosting effect of the brake system is poor due to the fact that the vacuum booster cannot obtain vacuum or the obtained vacuum is insufficient. The conventional car is a hydraulic power-assisted brake, the large-sized truck or bus is a pneumatic power-assisted brake, and the electric car is driven by a motor without a traditional engine, so that a vacuum source is lost, namely, the vacuum power cannot be provided for a master cylinder of the car brake. The vacuum booster pump of the electric automobile is used for compensating the defect, a vehicle-mounted power supply is used for providing power, a motor on a pump body is pushed to perform piston motion so as to generate vacuum, so that the braking force is increased, a unique and reliable vacuum source is provided for hydraulic braking systems of various automobile types such as the electric automobile, a hybrid electric automobile, an electric sightseeing bus, an electric field vehicle and the like, and the braking performance of the whole automobile is effectively improved. However, because the vacuum pump is installed on the frame, noise caused by the vacuum pump is transmitted to the cab through the frame, and the driving experience of passengers is affected.
At present, the Chinese patent with publication number CN109823327A, whose publication number is 2019, 05 and 31, provides a new energy vehicle electric vacuum pump damping and noise reducing device and method, where the new energy vehicle electric vacuum pump damping and noise reducing device includes a vacuum pump and a vehicle frame, the vehicle frame is provided with four positioning holes, the vacuum pump passes through the four positioning holes through bolts to be connected with the vehicle frame, each positioning hole is correspondingly provided with a damper, the damper includes an outer shell and an intermediate body, a spring is arranged between the intermediate body and the outer shell, and two ends of the spring are respectively abutted to the vehicle frame and the bolts. When the vacuum pump generates vibration, the spring absorbs the vibration of the vacuum pump as the most damping, so that the purposes of shock absorption and noise reduction are achieved.
In the above scheme, although the spring can reach the purpose of vibration/noise reduction, the spring is mostly made of metal, and the metal spring belongs to dense medium, and the noise of vacuum pump still conducts on the frame through the spring easily, therefore vibration/noise reduction's effect is not ideal.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity liquid hybrid brake system helping hand vacuum pump's noise reduction device can further reduce the transmission effect of vibration noise.
The utility model discloses a can realize through following technical scheme:
a noise reduction device of a power-assisted vacuum pump of an electro-hydraulic hybrid braking system comprises a vacuum pump and a frame, wherein a plurality of positioning holes are formed in the frame, a mounting plate is fixedly connected to the lower surface of the vacuum pump, through holes with the same number as the positioning holes are formed in the mounting plate, a damping device is arranged on each positioning hole and each through hole correspondingly, and the damping devices are arranged between the frame and the mounting plate;
the damping device comprises a piston, a piston rod, a first oil cylinder and a second oil cylinder, wherein the piston rod is perpendicular to the piston, one end of the piston rod is fixedly connected with the piston, the first oil cylinder is sleeved outside the piston and the piston rod, the piston divides the first oil cylinder into a first oil cavity and a second oil cavity, a plurality of first through holes are formed in the piston and are communicated with the first oil cavity and the second oil cavity, the piston and the piston rod are connected with the first oil cylinder in a sliding mode along the axial direction of the first oil cylinder, the second oil cylinder is sleeved outside the first oil cylinder, the second oil cylinder is fixedly connected with the first oil cylinder, a third oil cavity is formed by the inner wall of the second oil cylinder and the outer wall of the first oil cylinder, a plurality of second through holes are formed in the first oil cylinder and are communicated with the second oil cavity and the third oil cavity, and hydraulic oil is filled in the first.
According to the technical scheme, when the vacuum pump vibrates, the piston and the piston rod slide in the first oil cylinder along the axial direction of the first oil cylinder, at the moment, the volumes of the first oil cavity and the second oil cavity are changed, so that hydraulic oil in the first oil cavity and the second oil cavity can flow through the first through hole, hydraulic oil in the second oil cavity can flow through the second through hole, according to the orifice throttling characteristic of the fluid, the kinetic energy of the hydraulic oil can be converted into heat energy to be consumed, the vibration amplitude of the vacuum pump is further reduced, and the noise is reduced; because first to third oil intracavity all is filled with hydraulic oil, hydraulic oil belongs to fluid medium, therefore the sound wave is difficult for passing hydraulic oil and spreads to the frame on.
Furthermore, the damping device further comprises a fixing mechanism for fixing the damping device, the fixing mechanism comprises a stud and a tightening nut, one end of the stud is fixedly connected to the second oil cylinder, the other end of the stud penetrates through the positioning hole and then is in threaded connection with the tightening nut, and the second oil cylinder is abutted to the frame.
Through above-mentioned technical scheme, use double-screw bolt and the mode of screwing up the bolt to fix damping device on the frame, damping device's the maintenance and the change of being convenient for.
Furthermore, the damping device comprises a leveling mechanism used for enabling the mounting plate to be parallel to the frame, the leveling mechanism comprises a first leveling nut, a second leveling nut and an external thread arranged on the piston rod, the external thread is arranged at one end, far away from the piston, of the piston rod, the piston rod penetrates through the through hole and is in threaded connection with the first leveling nut and the second leveling nut, the mounting plate is arranged between the first leveling nut and the second nut, and the first leveling nut, the mounting plate and the second leveling nut are sequentially abutted.
According to the technical scheme, after the damping device is installed, the first leveling nuts are screwed on the piston rod, then the installation plate is placed on the first leveling nuts, then the four first leveling nuts are adjusted to be on the same plane, and finally the second leveling nuts are screwed; so set up the dismouting that has both made things convenient for the vacuum pump, and then make things convenient for the maintenance and the change of vacuum pump, make four piston rods keep parallel moreover, avoid damping device to become invalid.
Furthermore, damping device still includes reset spring, and reset spring cover is established outside the piston rod, and reset spring's one end and first hydro-cylinder butt, and reset spring's the other end and the butt of first leveling nut.
Through above-mentioned technical scheme, make the piston can reset in first hydro-cylinder, avoid making the whole evacuation of hydraulic oil in the second oil chamber under the action of gravity of vacuum pump, make first to third oil intracavity all keep filling have hydraulic oil, and then make damping device keep the shock attenuation effect.
Further, rubber gaskets are arranged between the tightening bolt and the frame, between the second oil cylinder and the frame, between the first leveling nut and the mounting plate and between the second leveling nut and the mounting plate.
Through above-mentioned technical scheme, avoid vacuum pump and frame to be connected through continuous rigidity piece for the vibrations of vacuum pump are weakened when the rubber gasket, improve the shock attenuation effect.
Further, damping device still includes the fixed establishment who is used for fixed damping device, and fixed establishment includes double-screw bolt and tightening nut, and the one end fixed connection of double-screw bolt is on the second hydro-cylinder, and the other end of double-screw bolt passes behind the through-hole and with tightening nut threaded connection, second hydro-cylinder and mounting panel butt.
Through above-mentioned technical scheme, use double-screw bolt and the mode of screwing up the bolt to fix damping device on the mounting panel, damping device's of being convenient for maintenance and change.
Furthermore, the damping device comprises a leveling mechanism used for enabling the mounting plate to be parallel to the frame, the leveling mechanism comprises a first leveling nut, a second leveling nut and an external thread arranged on the piston rod, the external thread is arranged at one end, far away from the piston, of the piston rod, the piston rod penetrates through the positioning hole and is in threaded connection with the first leveling nut and the second leveling nut, the cantilever is arranged between the first leveling nut and the second nut, and the first leveling nut, the cantilever and the second leveling nut are sequentially abutted.
According to the technical scheme, after the damping device is installed, the first leveling nut is screwed on the piston rod, then the piston rod penetrates through the positioning hole to enable the first leveling nut to be abutted against the cantilever, then the second leveling nut is screwed, and finally the installation plate is enabled to be parallel to the four cantilevers by adjusting the four second leveling nuts; the arrangement facilitates the disassembly and assembly of the vacuum pump, further facilitates the overhaul and replacement of the vacuum pump, and simultaneously ensures that the four piston rods are kept parallel, thereby avoiding the failure of the damping device; and the damping device and the vacuum pump are arranged on the same side of the mounting plate, so that the space occupation is reduced.
Furthermore, damping device still includes reset spring, and reset spring's one end and first hydro-cylinder butt, reset spring's the other end and the butt of first leveling nut.
Through above-mentioned technical scheme, make the piston can reset in first hydro-cylinder, avoid making the whole evacuation of hydraulic oil in the second oil chamber under the action of gravity of vacuum pump, make first to third oil intracavity all keep filling have hydraulic oil, and then make damping device keep the shock attenuation effect.
Further, rubber gaskets are arranged between the tightening bolt and the mounting plate, between the second oil cylinder and the mounting plate, between the first leveling nut and the cantilever and between the second leveling nut and the cantilever.
Through above-mentioned technical scheme, avoid vacuum pump and frame to be connected through continuous rigidity piece for the vibrations of vacuum pump are weakened when the rubber gasket, improve the shock attenuation effect.
To sum up, with current technical contrast, the beneficial effects of the utility model are as follows:
1. through the arrangement of the damping device, according to the orifice throttling characteristic of the fluid, the kinetic energy of the hydraulic oil can be converted into heat energy to be consumed, so that the vibration amplitude of the vacuum pump is reduced, and the noise is reduced; because first to third oil intracavity all is filled with hydraulic oil, hydraulic oil belongs to fluid medium, therefore the sound wave is difficult for passing hydraulic oil and spreads to the frame on.
2. Through the setting of leveling mechanism, both made things convenient for the dismouting of vacuum pump, and then made things convenient for the maintenance and the change of vacuum pump, make four piston rods keep parallel simultaneously, avoid damping device inefficacy.
3. Through reset spring's setting, make the piston can reset in first hydro-cylinder, avoid making the whole evacuation of hydraulic oil of second oil intracavity under the action of gravity of vacuum pump, make first to third oil intracavity all keep filling have hydraulic oil, and then make damping device keep the shock attenuation effect.
Drawings
FIG. 1 is a schematic partial cross-sectional view of a first embodiment;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a schematic overall structure view of another perspective of the first embodiment;
FIG. 4 is an enlarged view of B in FIG. 3;
FIG. 5 is an enlarged view of C in FIG. 3;
FIG. 6 is a schematic view of the overall structure of the second embodiment;
FIG. 7 is an enlarged view of D in FIG. 6;
fig. 8 is an enlarged view of E in fig. 6.
Reference numerals: 1. a vacuum pump; 11. mounting a plate; 2. a frame; 3. a damping device; 31. a piston; 311. a first through hole; 32. a piston rod; 33. a first cylinder; 331. a second through hole; 34. a second cylinder; 35. a first oil chamber; 36. a second oil chamber; 37. a third oil chamber; 38. a return spring; 4. a fixing mechanism; 41. a stud; 42. screwing down the nut; 5. a leveling mechanism; 51. a first leveling nut; 52. a second leveling nut; 6. a rubber gasket; 7. a spring washer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the noise reduction device of the power-assisted vacuum pump of the electro-hydraulic hybrid braking system comprises a vacuum pump 1 and a frame 2, wherein a plurality of positioning holes are formed in the frame 2, the lower surface of the vacuum pump 1 is welded or in threaded connection with an installation plate 11, and through holes with the same number as the positioning holes are formed in the installation plate 11. Each positioning hole and each through hole are correspondingly provided with a damping device 3, and the damping devices 3 are arranged between the frame 2 and the mounting plate 11.
Referring to fig. 1 and 2, the damping device 3 includes a piston 31, a piston rod 32, a first cylinder 33, and a second cylinder 34. The piston rod 32 and the piston 31 are coaxially and integrally formed, the first oil cylinder 33 is sleeved outside the piston 31 and the piston rod 32, and the piston 31 and the piston rod 32 are connected with the first shaft sleeve in a sliding mode along the axial direction of the first oil cylinder 33. The piston 31 divides the first cylinder 33 into a first oil chamber 35 and a second oil chamber 36, a plurality of first through holes 311 are formed in the piston 31 in parallel with the axis of the piston, and the first through holes 311 communicate the first oil chamber 35 and the second oil chamber 36.
The second oil cylinder 34 is sleeved outside the first oil cylinder 33, and the second oil cylinder 34 is fixedly connected with the first oil cylinder 33 through bolts. A third oil chamber 37 is formed by the inner wall of the second oil cylinder 34 and the outer wall of the first oil cylinder 33, a plurality of second through holes 331 are formed in one end face, far away from the piston rod 32, of the first oil cylinder 33, and the second oil chamber 36 and the third oil chamber 37 are communicated through the second through holes 331. The first oil chamber 35, the second oil chamber 36, and the third oil chamber 37 are filled with hydraulic oil, and the third oil chamber 37 is not completely filled with hydraulic oil.
Referring to fig. 3 and 4, the damping device 3 further includes a fixing mechanism 4 for fixing the damping device 3, and the fixing mechanism 4 includes a stud 41 and a tightening nut 42. In order to reduce the transmission of noise, a plurality of rubber gaskets 6 are provided at the fixing mechanism 4. One end of the stud 41 is welded on the end face, away from the piston rod 32, of the second cylinder 34, and the other end of the stud 41 firstly passes through one rubber gasket 6, then passes through the positioning hole, then passes through one rubber gasket 6, and finally is in threaded connection with the tightening nut 42. When the tightening nut 42 is tightened, the second cylinder 34 abuts against the frame 2 via the rubber gasket 6, and the tightening nut 42 abuts against the frame 2 via the rubber gasket 6.
Referring to fig. 3 and 5, the shock absorbing device 3 further includes a leveling mechanism 5 for making the mounting plate 11 parallel to the vehicle frame 2. In order to reduce the transmission of noise, a plurality of rubber gaskets 6 are also arranged at the leveling mechanism 5. The leveling mechanism 5 comprises a first leveling nut 51, a second leveling nut 52 and an external thread arranged on the piston rod 32, wherein the external thread is arranged on one end of the piston rod 32 far away from the piston 31.
During installation, the first leveling nut 51 is first screwed onto the piston rod 32, then the piston rod 32 is first threaded through one rubber gasket 6, then through the through hole, then through one rubber gasket 6, and finally the second leveling nut 52 is screwed onto the piston rod 32. After the first leveling nut 51 and the second leveling nut 52 are screwed, the first leveling nut 51, the rubber gasket 6, the mounting plate 11, the rubber gasket 6 and the second leveling nut 52 are abutted in sequence.
The damping device 3 further comprises a return spring 38, and the return spring 38 is sleeved outside the piston rod 32. One end of the return spring 38 abuts against the first cylinder 33, and the other end of the return spring 38 abuts against the first leveling nut 51 via the spring washer 7.
The implementation principle of the embodiment is as follows:
during installation, the studs 41 penetrate through the rubber gaskets 6, then the studs 41 penetrate through the installation holes, then penetrate through one rubber gasket 6, and finally the tightening nuts 42 are connected to the studs 41 in a threaded mode, so that the plurality of damping devices 3 are installed on the frame 2;
then, the return spring 38 is sleeved outside the piston rod 32, then the spring gasket 7 is sleeved outside the piston rod 32, then the first leveling nut 51 is in threaded connection with the piston rod 32, and then the rubber gasket 6 is sleeved on the piston rod 32; then, the through hole of the mounting plate 11 is correspondingly sleeved on the piston rod 32 of the corresponding damping device 3, then the rubber gasket 6 is sleeved on the piston rod 32, and then the second leveling nut 52 is in threaded connection with the piston rod 32; the mounting plate 11 is then aligned parallel to the frame 2 by adjusting the first and second leveling nuts 51, 52.
Example two:
referring to fig. 6 and 7, a noise reduction device for an electric-hydraulic hybrid brake system booster vacuum pump differs from the first embodiment in that a fixing mechanism 4 includes a stud 41 and a tightening nut 42. In order to reduce the transmission of noise, a plurality of rubber gaskets 6 are provided at the fixing mechanism 4.
One end of the stud 41 is welded on the end face, away from the piston rod 32, of the second cylinder 34, and the other end of the stud 41 firstly passes through one rubber gasket 6, then passes through the through hole, then passes through one rubber gasket 6, and finally is in threaded connection with the tightening nut 42. After the tightening nut 42 is tightened, the second cylinder 34 abuts against the mounting plate 11 via the rubber gasket 6, and the tightening nut 42 abuts against the mounting plate 11 via the rubber gasket 6.
Referring to fig. 6 and 8, the shock absorbing device 3 further includes a leveling mechanism 5 for making the mounting plate 11 parallel to the vehicle frame 2. In order to reduce the transmission of noise, a plurality of rubber gaskets 6 are also arranged at the leveling mechanism 5. The leveling mechanism 5 comprises a first leveling nut 51, a second leveling nut 52 and an external thread arranged on the piston rod 32, wherein the external thread is arranged on one end of the piston rod 32 far away from the piston 31.
During installation, the first leveling nut 51 is first screwed on the piston rod 32, then the piston rod 32 passes through one rubber gasket 6, then passes through the positioning hole, then passes through one rubber gasket 6, and finally the second leveling nut 52 is screwed on the piston rod 32. After the first leveling nut 51 and the second leveling nut 52 are screwed, the first leveling nut 51, the rubber gasket 6, the frame 2, the rubber gasket 6 and the second leveling nut 52 are abutted in sequence.
The damping device 3 further comprises a return spring 38, and the return spring 38 is sleeved outside the piston rod 32. One end of the return spring 38 abuts against the first cylinder 33, and the other end of the return spring 38 abuts against the first leveling nut 51 via the spring washer 7.
The implementation principle of the embodiment is as follows:
during installation, the studs 41 penetrate through the rubber gaskets 6, then the studs 41 penetrate through the through holes, then the studs penetrate through one rubber gasket 6, and finally the tightening nuts 42 are connected to the studs 41 in a threaded mode, so that the plurality of damping devices 3 are installed on the installation plate 11;
then, the return spring 38 is sleeved outside the piston rod 32, then the spring gasket 7 is sleeved outside the piston rod 32, then the first leveling nut 51 is in threaded connection with the piston rod 32, and then the rubber gasket 6 is sleeved on the piston rod 32; then, the piston rods 32 of the plurality of damping devices 3 penetrate through the corresponding positioning holes, then the rubber gaskets 6 are sleeved on the piston rods 32, and then the second leveling nuts 52 are connected to the piston rods 32 in a threaded mode; then the mounting plate 11 is parallel to the frame 2 by adjusting the first leveling nut 51 and the second leveling nut 52;
compared with the first embodiment, the present embodiment has the advantages that the damping device 3 and the vacuum pump 1 are on the same side of the mounting plate 11, so that the occupied space is reduced, and the space is saved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. A noise reduction device of a power-assisted vacuum pump of an electro-hydraulic hybrid braking system comprises a vacuum pump (1) and a frame (2), wherein a plurality of positioning holes are formed in the frame (2), an installation plate (11) is fixedly connected to the lower surface of the vacuum pump (1), through holes with the same number as the positioning holes are formed in the installation plate (11), a damping device (3) is arranged on each positioning hole and corresponds to each through hole, and the damping devices (3) are arranged between the frame (2) and the installation plate (11); it is characterized in that the preparation method is characterized in that,
the damping device (3) comprises a piston (31), a piston rod (32), a first oil cylinder (33) and a second oil cylinder (34), the piston rod (32) is perpendicular to the piston (31), one end of the piston rod (32) is fixedly connected with the piston (31), the first oil cylinder (33) is sleeved outside the piston (31) and the piston rod (32), the piston (31) divides the first oil cylinder (33) into a first oil chamber (35) and a second oil chamber (36), a plurality of first through holes (311) are formed in the piston (31), the first through holes (311) are communicated with the first oil chamber (35) and the second oil chamber (36), the piston (31) and the piston rod (32) are connected with the first oil cylinder (33) in a sliding mode along the axial direction of the first oil cylinder (33), the second oil cylinder (34) is sleeved outside the first oil cylinder (33), the second oil cylinder (34) is fixedly connected with the first oil cylinder (33), and a third oil chamber (37) is formed by the inner wall of the second oil cylinder (34) and the outer wall of the first oil cylinder (, a plurality of second through holes (331) are formed in the first oil cylinder (33), the second through holes (331) are communicated with the second oil cavity (36) and the third oil cavity (37), and hydraulic oil is filled in the first oil cavity (35), the second oil cavity (36) and the third oil cavity (37).
2. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 1, wherein the damping device (3) further comprises a fixing mechanism (4) for fixing the damping device (3), the fixing mechanism (4) comprises a stud (41) and a tightening nut (42), one end of the stud (41) is fixedly connected to the second oil cylinder (34), the other end of the stud (41) penetrates through the positioning hole and then is in threaded connection with the tightening nut (42), and the second oil cylinder (34) abuts against the frame (2).
3. The noise reduction device of the power-assisted vacuum pump of the electro-hydraulic hybrid braking system as claimed in claim 2, wherein the damping device (3) comprises a leveling mechanism (5) for enabling the mounting plate (11) to be parallel to the frame (2), the leveling mechanism (5) comprises a first leveling nut (51), a second leveling nut (52) and an external thread arranged on the piston rod (32), the external thread is arranged at one end, far away from the piston (31), of the piston rod (32), the piston rod (32) penetrates through the through hole and is in threaded connection with the first leveling nut (51) and the second leveling nut (52), the mounting plate (11) is arranged between the first leveling nut (51) and the second leveling nut, and the first leveling nut (51), the mounting plate (11) and the second leveling nut (52) are in abutting connection in sequence.
4. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 3, wherein the damping device (3) further comprises a return spring (38), the return spring (38) is sleeved outside the piston rod (32), one end of the return spring (38) is abutted against the first oil cylinder (33), and the other end of the return spring (38) is abutted against the first leveling nut (51).
5. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 4, wherein rubber gaskets (6) are arranged between the tightening nut (42) and the vehicle frame (2), between the second oil cylinder (34) and the vehicle frame (2), between the first leveling nut (51) and the mounting plate (11), and between the second leveling nut (52) and the mounting plate (11).
6. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 1, wherein the damping device (3) further comprises a fixing mechanism (4) for fixing the damping device (3), the fixing mechanism (4) comprises a stud (41) and a tightening nut (42), one end of the stud (41) is fixedly connected to the second oil cylinder (34), the other end of the stud (41) penetrates through the through hole and then is in threaded connection with the tightening nut (42), and the second oil cylinder (34) abuts against the mounting plate (11).
7. The noise reduction device of the power-assisted vacuum pump of the electro-hydraulic hybrid braking system according to claim 6, wherein the damping device (3) further comprises a leveling mechanism (5) for enabling the mounting plate (11) to be parallel to the frame (2), the leveling mechanism (5) comprises a first leveling nut (51), a second leveling nut (52) and an external thread arranged on the piston rod (32), the external thread is arranged at one end, far away from the piston (31), of the piston rod (32), the piston rod (32) penetrates through the positioning hole and is in threaded connection with the first leveling nut (51) and the second leveling nut (52), the cantilever is arranged between the first leveling nut (51) and the second leveling nut, and the first leveling nut (51) and the cantilever are sequentially abutted against the second leveling nut (52).
8. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 7, wherein the damping device (3) further comprises a return spring (38), the return spring (38) is sleeved outside the piston rod (32), one end of the return spring (38) abuts against the first oil cylinder (33), and the other end of the return spring (38) abuts against the first leveling nut (51).
9. The noise reduction device of the booster vacuum pump of the electro-hydraulic hybrid brake system according to claim 8, wherein rubber gaskets (6) are arranged between the tightening nut (42) and the mounting plate (11), between the second oil cylinder (34) and the mounting plate (11), between the first leveling nut (51) and the cantilever, and between the second leveling nut (52) and the cantilever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942306.3U CN210949671U (en) | 2019-11-11 | 2019-11-11 | Noise reduction device of power-assisted vacuum pump of electro-hydraulic hybrid braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921942306.3U CN210949671U (en) | 2019-11-11 | 2019-11-11 | Noise reduction device of power-assisted vacuum pump of electro-hydraulic hybrid braking system |
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| CN210949671U true CN210949671U (en) | 2020-07-07 |
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| CN201921942306.3U Active CN210949671U (en) | 2019-11-11 | 2019-11-11 | Noise reduction device of power-assisted vacuum pump of electro-hydraulic hybrid braking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701418A (en) * | 2022-05-06 | 2022-07-05 | 安徽马钢矿业资源集团南山矿业有限公司 | Impact noise reduction device and noise reduction method for carriage rear door plate of dump truck |
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2019
- 2019-11-11 CN CN201921942306.3U patent/CN210949671U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701418A (en) * | 2022-05-06 | 2022-07-05 | 安徽马钢矿业资源集团南山矿业有限公司 | Impact noise reduction device and noise reduction method for carriage rear door plate of dump truck |
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