WO2011054189A1

WO2011054189A1 - Electronic vacuum pump

Info

Publication number: WO2011054189A1
Application number: PCT/CN2010/001771
Authority: WO
Inventors: 邬建树
Original assignee: 宁波拓普制动系统有限公司
Priority date: 2009-11-06
Filing date: 2010-11-04
Publication date: 2011-05-12
Also published as: CN101705930A; CN101705930B

Abstract

An electronic vacuum pump includes a driving assembly, a pump-body assembly and a muffler assembly. The driving assembly is mounted to a pump-body (21) via a first bolt (2), and a second drive shaft (17) of the pump-body assembly is inserted into a hole of an eccentric block (20) so as to transmit power. The muffler assembly is mounted onto the pump-body (21) via a first muffler seal ring (22) and a third bolt (30). A motor (1) drives the eccentric block (20) to run the second drive shaft (17). With the transformation of a movement-direction transformation assembly, the movement directions of two pistons are opposite, thus counteracting the unbalance force rendered by the movement, further reducing vibration and noise of the parts and increasing the service life of the parts greatly. The vacuum degree is further increased when the parts are working because a double-function vacuum pump is formed by mounting a check valve in the muffler assembly.

Description

Electronic vacuum pump

Technical field

The utility model belongs to the field of ventilating pumps, in particular to an electronic vacuum pump.

Background technique

In the prior art, the brake technology of the passenger car uses the hydraulic braking mode. The driver applies the braking force on the brake pedal, and pushes the diaphragm in the master cylinder through the push rod to hydraulically transmit the four wheels. The sub-pump is used for braking. Because the braking force exerted by the human foot is relatively limited, the brake pressure requirements of the four sub-pumps under the vehicle braking condition cannot be met. Therefore, the vacuum booster is required to increase the assist force of the pedal, and the vacuum booster is There is a vacuum inside, the valve controls the atmosphere to enter and exit the vacuum booster, and the internal air pressure difference is generated. Finally, the vacuum source of the vacuum booster is generated by the push rod to the main cylinder. The conventional gasoline passenger car relies on the engine. The gas manifold provides a vacuum source, while the diesel vehicle provides a vacuum source through a mechanical vacuum pump mounted adjacent the engine pulley.

At the same time, due to the general plunger type vacuum pump, the two pistons move in the same direction, causing the pump body to vibrate too much, and the durability of the parts will decrease. At the same time, the NVH problem of the vehicle is solved due to the excessive vibration of the pump body. cost. Practical plough content

The technical problem solved by the utility model is to provide an electronic vacuum pump to reduce the vibration of the pump body while improving the vacuum.

The technical method used by the utility model to solve the technical problems thereof is as follows: An electronic vacuum pump is provided, which comprises a driving main assembly, a pump body assembly and a muffler assembly, wherein the driving assembly is installed by the first bolt At the lower end of the pump body, the drive shaft of the pump body assembly is inserted into the hole on the eccentric block to transmit power, and the muffler assembly is mounted on the pump body through the first muffler seal ring and the third bolt.

The drive assembly is composed of a motor and an eccentric block, and the eccentric block is interference mounted on the drive shaft of the motor.

The pump body assembly is composed of a pump body, two end cap assemblies, two piston assemblies, two cylinder sleeves, a movement direction conversion assembly and a joint; the cylinder sleeve and the movement direction conversion assembly are subjected to interference intrusion In the pump body: the piston assembly is installed in the cylinder liner and is installed on the center plate of the movement direction conversion assembly through the transmission shaft 1 and the transmission shaft; the end cover assembly is symmetrically installed through the end cover sealing ring and the second bolt At the two ends of the pump body cavity; the joint is assembled by the circlip and the vacuum joint seal ring after the pump body is assembled, and the end cover assembly is composed of the end cover, the first one-way valve seat and the first one-way valve diaphragm, first The one-way valve diaphragm is mounted on the first one-way valve seat, and the end cover is fastened to the first one-way valve seat.

The piston assembly is composed of a second one-way valve piece, a piston gland, a piston ring, a piston arm, and a first bearing, first The bearing is pressed into the piston arm, and the second one-way valve piece is mounted on the piston gland. The piston ring is fitted with the internal thread of the piston arm through the piston gland.

The moving direction conversion assembly is composed of a center disk, a second bearing, and an outer bearing positioning ring, and the second bearing and the center disk and the bearing outer positioning ring are both installed over 3⁄4.

The muffler assembly is composed of a muffler base, a second muffler seal ring, a muffler upper case, a muffler baffle, a check valve diaphragm, a diaphragm cover, a muffler cotton, and a check valve diaphragm through the pancreas The piece is mounted with the muffler base, and the muffler upper case is mounted on the muffler base by the second muffler seal ring and the muffler pad, and the muffler cotton and the muffler baffle are assembled on the muffler upper case and the muffler The base is composed of the inner cavity.

The first one-way valve diaphragm and the second one-way valve piece are respectively installed in the pump body, and the second one-way valve piece follows the piston assembly to move at the same time.

The utility model installs a one-way valve in the muffler assembly, and the gas in the pump changes with the movement of the piston, and the gas is discharged through the sound-absorbing cotton in time, and the outside atmosphere cannot enter the pump body through the isolation of the one-way valve diaphragm, forming a double The vacuum pump is used to further increase the vacuum during operation.

The motor drive shaft is mounted with an eccentric block, and different eccentricity eccentric blocks are formed according to different requirements to control the stroke of the piston movement.

The pump body is equipped with a movement direction conversion assembly, and the piston can be moved in the opposite direction to achieve the purpose of motion balance.

Beneficial effect

The utility model reduces the vibration of the parts, has low noise, and has a vacuum degree, and at the same time improves the service life of the parts.

DRAWINGS

Figure 1 is a front view of the utility model.

1 electric a, 2 - first bolt, 3 - end cap sealing ring, 4 - second bolt, 5 - end cap, 6 - second check valve, ₇ - first check valve pancreas, 8 - The first one-way valve seat, 9-piston pressure ^, 10 - sealing 圏, 11 - piston ring, I ² - cylinder liner, 13 - piston arm, 14 a first bearing, 15-~ l moving shaft one, 16- Center plate, 17-drive shaft two '18-second bearing, 19-bearing outer positioning ring, ²⁰ -eccentric block, ² 〗〖one pump body.

Figure 2 is a partial enlarged view of the front view of the utility model.

Figure 3 is a side view of the utility model

22—The first silencer seal 圏' 23—Muffler base, 24—Second silencer seal 蹰, 25—Muffler upper case, ₂₆ -muffler partition, 27-component cover, 28—check valve Mold, 29-muffling cotton, 30-third bolt, 31-muffler Washer, 32 - circlip, 33 - vacuum joint seal, 34 - joint.

4 a side view of the present invention FIG. _U partial enlarged view of FIG.

detailed description '

In the following, in conjunction with the specific embodiments, the following is a description of the utility model. It is to be understood that the examples are not intended to limit the scope of the invention. In addition, it should be understood that various modifications and changes may be made by those skilled in the art in the form of the appended claims.

• Example 1

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, an electronic air pump includes a motor 1, a pump body 21, a one-way valve seat, a piston arm 13, a bearing, a drive shaft, a center plate 16 and an eccentric block. 20, the motor 1 motor tightening screw and the anti-loose gasket are fixed to the bottom position of the pump body 21, the motor 1 shaft aligns the eccentric block 20, and the eccentric block 20 is fixed to the right end of the center plate 16 through the transmission shaft 217. The left end of the center plate 16 is fixed with a piston arm 13 above the transmission shaft 15 through the bearing, and a bearing is fixed on the transmission shaft between the right end of the center plate 16 and the eccentric block 20 and fixed to the other piston arm 13 through the bearing. The two cylinder sleeves are symmetrically located on both sides of the inner cavity of the pump body 21. The two piston arms 13 are symmetrically connected to the central disk 16 via the transmission shaft 15 and the transmission shafts 17, respectively, and the first one-way valve seat 8 is fixed on the end cover 5. And the second screw inspection 4 is installed at both ends of the pump body 21, the sound-absorbing helmet base 23 is fixed to the upper end surface of the pump body 21, and the upper portion of the muffler base 23 is fixed to the upper casing 25 of the muffler, and the rear of the pump body 21 passes through the cassette 32 and Vacuum joint sealing ring 33 mating connection joint 34

The first one-way valve seat 8 and the end cover 5 on both sides are sealed to the pump body 21 through the end cap seals 3, 10, respectively.

As shown in Figure 1, the position piston assembly is at the exhaust stop point, at which point the motor rotates 180. The time is the inspiratory stop.

Claims

An electronic vacuum pump comprising a driving assembly, a pump body assembly, and a muffler assembly, wherein: the driving assembly is mounted on a lower end of the pump body (21) via a first bolt (2), At the same time, the drive shaft 2 (17) of the pump body assembly is inserted into the hole in the eccentric block (20> to transmit power, and the muffler assembly is mounted on the pump through the first muffler seal ring (22) and the third bolt (30). On body (21).

2. An electronic vacuum pump according to claim 1, wherein: said drive assembly consists of a motor U) and an eccentric block (20), an eccentric block (20). an interference fit on the motor '(1) On the drive shaft,

3. An electronic vacuum pump according to claim 1, wherein: said pump body assembly comprises a pump body (21), two end cap assemblies, two piston assemblies, and two cylinder liners ( 12), the movement direction conversion assembly, the joint (34); the cylinder sleeve (12) and the movement direction conversion assembly are pressed into the pump body (21); the piston assembly is installed in the cylinder sleeve while passing through the transmission shaft (15) The transmission shaft 2 (17) is interference mounted on the center plate (16) of the movement direction conversion assembly; the end cover assembly is symmetrically mounted on the pump through the end cover seal 圏 (3) and the second bolt (4) Both ends of the body cavity; connector

(34) Install the clamp (32) and the vacuum joint seal (33) on the rear side of the pump body (21).

4. An electronic vacuum pump according to claim 3, wherein: said end cap assembly comprises an end cap (5), a first one-way valve seat (8), and a first one-way valve pancreas (7) The first check valve diaphragm (7) is mounted on the first one-way valve seat (8), and the end cymbal (5) is fastened to the first one-way valve seat (8).

5. An electronic vacuum pump according to claim 3, wherein: said piston assembly is formed by a second one-way valve

(6), the piston gland (9), the piston ring (11>, the piston arm (13), the first bearing (14), the first bearing (14) is pressed into the movable arm (13>, the second single Install the live plug (9) on the valve plate (6), and the piston ring (II) is fastened by the piston gland (9> with the internal thread of the piston arm (13).

6. The electronic vacuum pump according to claim 3, wherein: the movement direction conversion assembly is composed of a center plate (16), a second bearing (18), and an outer bearing positioning 阄 (19), The two bearings (Ϊ 8) and the center plate (16) and the bearing outer positioning ring (19) are both interference mounted. '

7. An electronic vacuum pump according to claim 1, wherein: said muffler assembly is comprised of a muffler base

(23) a second sealing ring muffler (24), the silencer housing ^(25), a muffler separator (26), the check valve membrane (28), phosphine cover sheet (27), cotton muffler (29 〉Composition, the check valve cymbal (28) is mounted with the muffler base (23) through the diaphragm cover ( ). muffler upper case ( ²⁵ ) 3⁄4 over the second muffler seal ( ²⁴ ) and silencer washer (31) mating mounting the muffler base (), the cotton muffler (29) and a muffler separator ⁽²⁶⁾ fitted on the assembled muffler shell internal cavity (25) and a muffler base ^(23> consisting of .