CN215370688U

CN215370688U - Clutch slave cylinder with control electromagnetic valve

Info

Publication number: CN215370688U
Application number: CN202120938554.1U
Authority: CN
Inventors: 杨文君; 张建元
Original assignee: Shaanxi Wan'an Automobile Parts Co ltd
Current assignee: Shaanxi Wan'an Automobile Parts Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-31
Anticipated expiration: 2031-04-30

Abstract

The utility model relates to the field of clutch control, in particular to a clutch slave cylinder with a control electromagnetic valve, which comprises a shell, wherein a gas pressure cavity and an oil pressure cavity are arranged in the shell, the gas pressure cavity and the oil pressure cavity are separated by a push rod assembly, the push rod assembly comprises a push rod, and the clutch slave cylinder also comprises a gas cavity piston and an oil cavity piston which are assembled on the push rod, the oil cavity piston is in sealed sliding fit with the inner wall of the oil pressure cavity, and the gas cavity piston is in sealed sliding fit with the inner wall of the gas pressure cavity; the control electromagnetic valve comprises a valve body, an air inlet electromagnetic valve and an air outlet electromagnetic valve are arranged in the valve body, the air inlet electromagnetic valve is connected with the air inlet, and the air inlet electromagnetic valve controls the connection and disconnection of the air inlet and the air pressure cavity; the exhaust electromagnetic valve controls the connection and disconnection of the air pressure cavity and the exhaust port. The clutch slave cylinder has the advantages of reliable control and simple and compact structure.

Description

Clutch slave cylinder with control electromagnetic valve

Technical Field

The utility model relates to the field of clutch slave cylinders, in particular to a clutch slave cylinder with a control electromagnetic valve.

Background

At present, a servo mechanism in a clutch control system of a commercial vehicle consists of a clutch master cylinder and a clutch slave cylinder, and Chinese patent CN201510976314.X provides a dustproof clutch slave cylinder, namely, when gear shifting is carried out, the clutch master cylinder gives an oil pressure signal to the clutch slave cylinder, a valve of a pneumatic part is opened, a large driving force is output in proportion to separate a clutch, and the purpose of gear shifting is achieved! Because the pneumatic valve is driven to work by oil pressure, the fault caused by mutual entering of oil and gas accounts for more than 70 percent of the total fault.

Secondly, with the trend of automatic gear configuration of commercial vehicles, AMT is popular for road vehicles due to its simple and reliable structure, easy maintenance, low operation strength, etc. The actuating mechanism of AMT gear shifting is a clutch controller, and a pneumatic clutch slave cylinder controlled by a solenoid valve.

Finally, in the present situation of China, the manual gear is simple in mechanism, reliable in performance, oil-saving, economical and high in applicability, and the automatic gear is basically not applicable under the working conditions of mines, construction sites and the like. However, the control strength is high, so a clutch slave cylinder with electromagnetic valve control, oil-gas separation, oil pressure conversion into an electric signal control electromagnetic valve and clutch separation is developed, and the clutch slave cylinder is suitable for manual/automatic gears to solve the problems.

The existing clutch slave cylinder has the following problems: 1. no matter what structure the clutch slave cylinder of the present commercial vehicle clutch control system in China is, liquid and gas are used as working media to work, namely, a master cylinder generates a hydraulic signal to drive a piston valve, an air inlet valve is opened, and then a cylinder generates a driving force to separate the clutch, so that gear shifting is realized; in addition, although the manual gear is durable and reliable, frequent gear shifting leads to the increase of the working strength of a driver, leads to fatigue and causes safety problems;

2. the characteristic of AMT makes it most possible to realize in commercial vehicle on a large scale, the working medium of its clutch actuator is only compressed air, when the gas leakage or the gas source trouble appear, can't shift gears effectively; the oil cylinder is separated from a piston valve, and the gear shifting is realized by that the oil cylinder only provides an oil pressure signal, the electromagnetic valve is opened after the oil cylinder is converted into a voltage signal, the air cylinder is inflated, a push rod is driven to separate the clutch, the gear shifting is realized, and the gear shifting can be realized as standby hydraulic pressure when a product leaks air or an air source fails; when the clutch is engaged, the hydraulic pressure disappears, the slow-discharge magnetic valve discharges air, and the process meets the semi-linkage clutch requirement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a clutch slave cylinder with a control electromagnetic valve, aiming at the defects of the existing clutch slave cylinder.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

the clutch slave cylinder with the control electromagnetic valve comprises a shell, wherein a gas pressure cavity and an oil pressure cavity are arranged in the shell, the gas pressure cavity and the oil pressure cavity are separated by a push rod assembly, the push rod assembly comprises a push rod, and the clutch slave cylinder further comprises a gas cavity piston and an oil cavity piston which are assembled on the push rod, the oil cavity piston is in sealing sliding fit with the inner wall of the oil pressure cavity, and the gas cavity piston is in sealing sliding fit with the inner wall of the gas pressure cavity; the control electromagnetic valve comprises a valve body, an air inlet electromagnetic valve and an air outlet electromagnetic valve are arranged in the valve body, the air inlet electromagnetic valve is connected with the air inlet, and the air inlet electromagnetic valve controls the connection and disconnection of the air inlet and the air pressure cavity; the exhaust electromagnetic valve controls the connection and disconnection of the air pressure cavity and the exhaust port.

Preferably, the shell is provided with an air inlet channel and an air outlet channel which are communicated with the air pressure cavity, the air inlet electromagnetic valve controls the communication between the air inlet and the air inlet channel, and the air outlet electromagnetic valve controls the communication between the air outlet channel and the air outlet.

Preferably, the control solenoid valve is provided outside the oil pressure chamber housing.

Preferably, the aperture of the intake passage is larger than the aperture of the exhaust port.

Preferably, one end of the push rod is connected with a push rod, a dust cover is mounted on the push rod, and one end of the dust cover is fixedly connected with the shell.

Preferably, the air inlet electromagnetic valve comprises a valve seat and a valve, a valve port is formed in the valve seat, the valve comprises an iron core and a sealing block fixed at one end of the iron core, a return spring is installed on the valve seat, the iron core is pushed by the return spring in an initial state to enable the sealing block to seal the valve port, when the electromagnetic valve is electrified, the iron core overcomes the acting force of the return spring to open the valve port, and the air inlet is communicated with the air inlet channel.

Preferably, the exhaust solenoid valve is provided with a valve seat and a valve structure communicated with the intake solenoid valve.

Through the technical scheme, the utility model has the following technical effects:

the clutch slave cylinder that designs of this scheme can be reliable realizes the liquid accuse separation, and the solenoid valve can independent control clutch slave cylinder, and the clutch master cylinder can provide the separation signal and give the solenoid valve, operates clutch slave cylinder, realizes clutch separation and meshing. And the whole clutch slave cylinder has compact structure and small occupied space.

Drawings

Fig. 1 is a schematic structural diagram of the device.

Fig. 2 is an enlarged view of fig. 1.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-shell, 2-air pressure cavity, 3-oil pressure cavity, 4-push rod, 5-air cavity piston, 9-oil cavity piston, 10-control solenoid valve, 11-valve body, 12-air inlet solenoid valve, 14-air outlet solenoid valve, 15-air inlet, 16-air outlet, 17-air inlet channel, 18-air outlet channel, 19-ejector rod, 20-valve seat, 21-valve, 22-valve port, 24-iron core, 25-sealing block, 26-return spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The clutch slave cylinder with the control electromagnetic valve 10 comprises a shell 1, wherein a gas pressure cavity 2 and an oil pressure cavity 3 are arranged in the shell 1, the gas pressure cavity 2 and the oil pressure cavity 3 are separated by a push rod 4 assembly, the push rod 4 assembly comprises a push rod 4, and the clutch slave cylinder further comprises a gas cavity piston 5 and an oil cavity piston 9 which are assembled on the push rod 4, the oil cavity piston 9 is in sealed sliding fit with the inner wall of the oil pressure cavity 3, and the gas cavity piston 5 is in sealed sliding fit with the inner wall of the gas pressure cavity 2; the air inlet electromagnetic valve is characterized by further comprising a control electromagnetic valve 10, wherein the control electromagnetic valve 10 comprises a valve body 11, an air inlet electromagnetic valve 12 and an exhaust electromagnetic valve are arranged in the valve body 11, the air inlet electromagnetic valve 12 is connected with an air inlet 15, and the air inlet electromagnetic valve 12 controls the connection and disconnection of the air inlet 15 and the air pressure cavity 2; the exhaust solenoid valve 14 controls the communication and disconnection of the pneumatic chamber 2 and the exhaust port 16.

In this embodiment, the housing 1 is provided with an inlet passage 17 and an outlet passage 18 which are communicated with the air pressure chamber 2, the inlet electromagnetic valve 12 controls the communication between the inlet 15 and the inlet passage 17, and the outlet electromagnetic valve 14 controls the communication between the outlet passage 18 and the outlet 16. Thereby realizing the control of the electromagnetic valve on-off of the air inlet.

In this embodiment, the control solenoid valve 10 is disposed outside the housing of the oil pressure chamber 3. Since the oil pressure chamber 3 is generally in the shape of a projecting pipe, the control solenoid valve 10 is provided outside the oil pressure chamber 3

In order to increase the intake air amount, the diameter of the intake passage 17 is larger than the diameter of the exhaust port 16 in the present embodiment.

In this embodiment, one end of the push rod 4 is connected with a push rod 19, a dust cover is mounted on the push rod 19, and one end of the dust cover is fixedly connected with the housing 1.

In this embodiment, the intake solenoid valve 12 includes a valve seat 20 and a valve 21, the valve seat 20 is provided with a valve port 22, the valve 21 includes an iron core 24 and a sealing block 25 fixed at one end of the iron core 24, the valve seat 20 is provided with a return spring 26, the return spring 26 pushes the iron core 24 to make the sealing block 25 seal the valve port 22 in an initial state, when the solenoid valve is powered on, the iron core 24 overcomes the acting force of the return spring 26 to open the valve port 22, and the intake port 15 is communicated with the intake channel 17. Wherein the exhaust solenoid valve 14 is provided with a valve seat 20, valve 21 structure in communication with the intake solenoid valve 12 in this embodiment.

Since there is a certain distance between the intake solenoid valve 12 and the exhaust solenoid valve 14, the space occupied in the longitudinal direction is large, and in order not to affect the original size of the housing 1, the intake passage 17 in this embodiment is disposed obliquely.

The specific working process of the scheme is as follows:

1, the clutch is engaged in a non-working state, the air cavity and the oil cavity do not build pressure, the air inlet electromagnetic valve 12 and the air outlet electromagnetic valve 14 are not electrified, the clutch is in an engaged state, and the ejector rod 19, the push rod 4 and the air cavity piston 5 are positioned at the rightmost end of the shell 1 under the action of the clutch release fork;

2, in the working state, the clutch master cylinder generates oil pressure and then provides a signal, the air inlet electromagnetic valve 12 is opened, the air outlet electromagnetic valve 14 is closed, the air pressure cavity 2 is inflated to push the piston to the right, the ejector rod 19 is driven to separate the clutch, and gear shifting is executed; after gear shifting is finished, the pressure of the oil pressure cavity 3 disappears, the clutch master cylinder releases the pressure, the air inlet electromagnetic valve is closed, the air exhaust electromagnetic valve 14 is opened, compressed air in the air pressure cavity 2 is exhausted at a certain speed to ensure that a clutch pressure plate is stably engaged, and the ejector rod 19 returns to the original position under the driving of a clutch shifting fork;

3) if a pressure sensor is added, the operation can be controlled by the ECU; if the electromagnetic valve or the air circuit fails, the gear shifting function can be realized by the pressure generated by the clutch master cylinder.

Example 2

This embodiment is different from embodiment 1 in that: and a Y-shaped sealing ring is arranged on the air cavity piston 5.

Example 3

The automobile comprises the clutch cylinder.

Claims

1. Clutch slave cylinder with control solenoid valve, its characterized in that: the oil-gas separation device comprises a shell (1), wherein an air pressure cavity (2) and an oil pressure cavity (3) are arranged in the shell (1), the air pressure cavity (2) and the oil pressure cavity (3) are separated by a push rod (4) assembly, the push rod (4) assembly comprises a push rod (4), and the oil-gas separation device also comprises an air cavity piston (5) and an oil cavity piston (9) which are assembled on the push rod (4), the oil cavity piston (9) is in sealed sliding fit with the inner wall of the oil pressure cavity (3), and the air cavity piston (5) is in sealed sliding fit with the inner wall of the air pressure cavity (2); the air-pressure-regulating valve further comprises a control electromagnetic valve (10), the control electromagnetic valve (10) comprises a valve body (11), an air inlet electromagnetic valve (12) and an air exhaust electromagnetic valve are arranged in the valve body (11), the air inlet electromagnetic valve (12) is connected with an air inlet (15), and the air inlet electromagnetic valve (12) controls the connection and disconnection of the air inlet (15) and the air pressure cavity (2); the exhaust electromagnetic valve (14) controls the connection and disconnection of the air pressure cavity (2) and the exhaust port (16).

2. The clutch slave cylinder with the control solenoid valve as set forth in claim 1, wherein: an air inlet channel (17) and an air outlet channel (18) which are communicated with the air pressure cavity (2) are arranged on the shell (1), an air inlet electromagnetic valve (12) controls the communication of the air inlet (15) and the air inlet channel (17), and an air outlet electromagnetic valve (14) controls the communication of the air outlet channel (18) and the air outlet (16).

3. The clutch slave cylinder with the control solenoid valve as set forth in claim 2, wherein: the control electromagnetic valve (10) is arranged outside the shell of the oil pressure cavity (3).

4. The clutch slave cylinder with the control solenoid valve as set forth in claim 2, wherein: the aperture of the air inlet channel (17) is larger than that of the air outlet (16).

5. The clutch slave cylinder with the control solenoid valve as set forth in claim 1, wherein: one end of the push rod (4) is connected with a push rod (19), a dust cover is installed on the push rod (19), and one end of the dust cover is fixedly connected with the shell (1).

6. The clutch slave cylinder with the control solenoid valve as set forth in claim 1, wherein: the air inlet electromagnetic valve (12) comprises a valve seat (20) and a valve (21), a valve port (22) is formed in the valve seat (20), the valve (21) comprises an iron core (24) and a sealing block (25) fixed to one end of the iron core (24), a return spring (26) is installed on the valve seat (20), the iron core (24) is pushed by the return spring (26) under the initial state to enable the sealing block (25) to seal the valve port (22), when the electromagnetic valve is electrified, the iron core (24) overcomes the acting force of the return spring (26), the valve port (22) is opened, and the air inlet (15) is communicated with the air inlet channel (17).

7. The clutch slave cylinder with the control solenoid valve as set forth in claim 6, wherein: the exhaust electromagnetic valve (14) is provided with a valve seat (20) and a valve (21) structure communicated with the air inlet electromagnetic valve (12).

8. The clutch slave cylinder with the control solenoid valve as set forth in claim 1, wherein: the control electromagnetic valve (10) is electrically connected with the clutch master cylinder to realize signal interaction, or the clutch is controlled to be separated by receiving ECU analog signals, or the clutch is controlled to be separated by receiving pedal separation signals.