CN201721438U

CN201721438U - Electronic vacuum pump

Info

Publication number: CN201721438U
Application number: CN2010202377230U
Authority: CN
Inventors: 邬建树
Original assignee: NINGBO TUOPU STEERING SYSTEM CO Ltd
Current assignee: Ningbo Tuopu Intelligent Brake System Co., Ltd.
Priority date: 2010-06-25
Filing date: 2010-06-25
Publication date: 2011-01-26
Anticipated expiration: 2020-06-25

Abstract

The utility model relates to an electronic vacuum pump comprising a driving assembly, a pump body assembly and a muffler assembly, wherein the driving assembly is arranged on a pump body (21) through a bolt (2), and simultaneously a transmission shaft II (17) of the pump body assembly is inserted into a hole of an eccentric block (20) to transmit power; and the muffler assembly is arranged on the pump body (21) through a muffler sealing ring (22) and a bolt (30). In the utility model, a motor (1) drives the eccentric block (20) to drive the transmission shaft II (17) and by the shifting of a moving direction shifting assembly, the moving directions of pistons are opposite, and unbalanced force generated in movement is cancelled out, thus further lowering the vibration and the noise of parts and simultaneously greatly prolonging the service life of the parts. As a check valve is arranged in the muffler assembly to form the double-function vacuum pump, the vacuum degree during working of the part is further improved.

Description

Electronic vacuum pump

Technical field

The utility model belongs to field of vacuum, particularly relates to a kind of electronic vacuum pump.

Background technology

Riding vehicle braking technology of the prior art all adopts the hydraulic brake mode, chaufeur is by brake activation power on brake pedal, promote the master cylinder interior diaphragm by push rod and carry out hydrostatic drive, make the wheel cylinder on four wheels brake, because the braking-force ratio that people foot applies is more limited, can't satisfy the brake-pressure requirement of following four wheel cylinders of car load braking situation, so need vacuum booster that pedal is increased power-assisted, there is vacuum in vacuum booster in inside, by valve control atmosphere turnover vacuum booster, make its inner draught head that produces, finally master cylinder is caused power-assisted by push rod.The vacuum source of vacuum booster is generally from two aspects, and the conventional gasoline manned vehicle relies on engine intake manifold that vacuum source is provided, and diesel-powered vehicle provides vacuum source by near the oil-sealed rotary pump that is installed in the engine belt pulley.

Simultaneously because the vacuum pump of general plunger tpe, two-piston is done motion in the same way, causes pump housing vibration excessive, and the durable meeting of part descends to some extent, simultaneously since the pump housing vibrate and excessively cause automobile NVH problem to solve will changing higher cost.

The utility model content

Technical problem to be solved in the utility model provides a kind of electronic vacuum pump, to reduce pump housing vibration gas clean-up simultaneously.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of electronic vacuum pump is provided, comprise and drive assembly, pump housing assembly, silencer assembly, described driving assembly is installed in pump housing lower end by bolt, simultaneously the transmission shaft two of pump housing assembly is inserted hole on the eccentric blocks with transferring power, the silencer assembly is installed on the pump housing by silencer seal ring and bolt.

Described driving assembly is made up of motor and eccentric block, and the eccentric block interference is installed on the drive axle of motor.

Described pump housing assembly is made up of the pump housing, two end cap assemblies, two piston assemblies, two cylinder sleeves, sense of motion conversion assembly, joints; Cylinder sleeve and the interference of sense of motion conversion assembly are pressed in the pump housing; Piston assembly is installed in the cylinder sleeve and is installed on the spider of sense of motion conversion assembly by transmission shaft one and transmission shaft two interference simultaneously; The end cap assembly is installed in pump housing inner chamber two ends by end cap seal circle and bolt symmetry; Joint is installed in pump housing rear side by jump ring and joint sealing circle.

Described end cap assembly is made up of end cap, the first unidirectional valve seat, the first check valve diaphragm, and the first check valve diaphragm is installed on the first unidirectional valve seat, and the end cap and the first unidirectional valve seat are closely together.

Described piston assembly is made up of second check valve sheet, piston gland, piston ring, piston arm, bearing, and the bearing interference is pressed into piston arm, and second check valve sheet is installed on the piston gland, and piston ring tightens together by piston gland and piston arm screw-internal thread fit.

Described sense of motion conversion assembly is made up of spider, bearing, bearing outside fix circle, and bearing and spider and bearing outside fix circle are interference and install.

Described silencer assembly is made up of silencer base, silencer seal ring, silencer upper casing, silencer dividing plate, check valve diaphragm, diaphragm lid, noise reduction cotton, the check valve diaphragm is installed together with the silencer base by the diaphragm lid, the silencer upper casing is installed on the silencer base by silencer seal ring and the cooperation of silencer packing ring, and noise reduction cotton and silencer dividing plate cooperate in the inner chamber that is assembled in silencer upper casing and silencer base composition.

The described first check valve diaphragm and second check valve sheet are installed in respectively in the pump housing, and wherein second check valve sheet is followed piston assembly and moved simultaneously.

Describedly in the silencer assembly, check valve is installed, along with changing, its pump inner volume of motion of piston in time gas is discharged by noise reduction is cotton, ambient atmosphere can not enter in the pump housing through the isolation of check valve diaphragm simultaneously, forms the double acting vacuum pump, the degree of vacuum when further improving work.

On the described motor transmission shaft eccentric block is installed, the eccentric block of making different eccentric throws according to different demands is to control the stroke of its piston motion.

Sense of motion conversion assembly is equipped with in described pump housing inside, can reach the purpose of moving equilibrium so that the piston motion direction is relative by conversion.

Beneficial effect

The utility model part vibrates, noise is little, degree of vacuum height, the service life of improving part simultaneously.

Description of drawings

Fig. 1 is the utility model front view,

The 1-motor, 2-bolt, 3-end cap seal circle, 4-bolt, the 5-end cap, 6-second check valve sheet, 7-first check valve sheet, the 8-first unidirectional valve seat, the 9-piston gland, 10-seal ring, 11-piston ring, 12-cylinder sleeve, the 13-piston arm, 14-clutch shaft bearing, 15-transmission shaft one, the 16-spider, 17-transmission shaft two, 18-second bearing, 19-bearing outside fix circle, 20-eccentric block, the 21-pump housing.

Fig. 2 is the utility model front view partial enlarged drawing.

Fig. 3 is the utility model lateral plan

22-silencer seal ring, 23-silencer base, 24-silencer seal ring, 25-silencer upper casing, 26-silencer dividing plate, 27-matrix lid, 28-check valve matrix, 29-noise reduction cotton, 30-bolt, 31-silencer packing ring, 32-jump ring, 33-vacuum adapter seal ring, 34-joint.

Fig. 4 is the utility model lateral plan partial enlarged drawing.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, a kind of electronic vacuum pump, comprise motor 1, the pump housing 21, unidirectional valve seat, piston arm 13, bearing, transmission shaft, spider 16 and eccentric block 20, centers below the pump housing 21 are fixed in the cooperation that motor 1 motor is marked closely screw and check washer, motor 1 output shaft fixed eccentric block 20, eccentric block 20 is fixed in the right-hand member of spider 16 by transmission shaft 2 17, spider 16 left ends cooperate a piston arm 13 of its top, location with bearing by transmission shaft 1, be fixed with bearing and fixing on the transmission shaft between spider 16 right-hand members and the eccentric block 20 by bearing and another piston arm 13, two cylinder sleeve symmetries are positioned at the pump housing 21 inner chamber both sides, two-piston arm 13 by transmission shaft 1 and transmission shaft 2 17 respectively symmetry be connected on the spider 16, the first unidirectional valve seat 8 is fixed on the end cap 5 and by bolt 4 and is installed in the pump housing 21 two ends, silencer base 23 is fixed in the pump housing 21 upper surfaces, and silencer base 23 tops are silencer upper casing 25 fixedly, and the pump housing 21 back are by jump ring 32 and vacuum adapter seal ring 33 joint 34 that is connected.

First unidirectional valve seat 8 of both sides and end cap 5 are respectively by end

cap seal circle

3,10 and the pump housing 21 sealings.

The position piston assembly is in the exhaust stop as shown in Figure 1, on this basis, position, is air-breathing stop when motor rotates 180 °.

Claims

1. electronic vacuum pump, comprise and drive assembly, pump housing assembly, silencer assembly, it is characterized in that: described driving assembly is installed in the pump housing (21) lower end by bolt (2), simultaneously the transmission shaft two (17) of pump housing assembly is inserted hole on the eccentric blocks (20) with transferring power, the silencer assembly is installed on the pump housing (21) by silencer seal ring (22) and bolt (30).

2. a kind of electronic vacuum pump according to claim 1 is characterized in that: described driving assembly is made up of motor (1) and eccentric block (20), and eccentric block (20) interference is installed on the transmission shaft of motor (1).

3. a kind of electronic vacuum pump according to claim 1 is characterized in that: described pump housing assembly is made up of the pump housing (21), two end cap assemblies, two piston assemblies, two cylinder sleeves (12), sense of motion conversion assembly, joints (34); Cylinder sleeve (12) and the interference of sense of motion conversion assembly are pressed in the pump housing (21); Piston assembly is installed in the cylinder sleeve and is installed on the spider (16) of sense of motion conversion assembly by transmission shaft one (15) and transmission shaft two (17) interference simultaneously; The end cap assembly is installed in pump housing inner chamber two ends by end cap seal circle (3) and bolt (4) symmetry; Joint (34) is installed in the pump housing (21) rear side by jump ring (32) and vacuum adapter seal ring (33).

4. a kind of electronic vacuum pump according to claim 3, it is characterized in that: described end cap assembly is made up of end cap (5), the first unidirectional valve seat (8), the first check valve diaphragm (7), the first check valve diaphragm (7) is installed on the first unidirectional valve seat (8), and end cap (5) is closely together with the first unidirectional valve seat (8).

5. a kind of electronic vacuum pump according to claim 3, it is characterized in that: described piston assembly is made up of second check valve sheet (6), piston gland (9), piston ring (11), piston arm (13), clutch shaft bearing (14), clutch shaft bearing (14) interference is pressed into piston arm (13), second check valve sheet (6) is installed on the piston gland (9), and piston ring (11) tightens together by piston gland (9) and piston arm (13) screw-internal thread fit.

6. a kind of electronic vacuum pump according to claim 3, it is characterized in that: described sense of motion conversion assembly is made up of spider (16), second bearing (18), bearing outside fix circle (19), and second bearing (18) is interference with spider (16) and bearing outside fix circle (19) and installs.

7. a kind of electronic vacuum pump according to claim 1, it is characterized in that: described silencer assembly is by silencer base (23), silencer seal ring (24), silencer upper casing (25), silencer dividing plate (26), check valve diaphragm (28), diaphragm lid (27), noise reduction cotton (29) is formed, check valve diaphragm (28) is installed together by diaphragm lid (27) and silencer base (23), silencer upper casing (25) is installed on the silencer base (23) by silencer seal ring (24) and silencer packing ring (31) cooperation, and noise reduction cotton (29) and silencer dividing plate (26) cooperate in the inner chamber that is assembled in silencer upper casing (25) and silencer base (23) composition.