SU1527050A1 - Control device for pneumatic brake actuator - Google Patents

Abstract

The invention relates to mechanical engineering. The purpose of the invention is to simplify the design. The goal is achieved by locating the membrane regulator of braking forces of the radial type in the lower section of a two-section brake valve. The twin-seat valve 13 of the lower section is located in the movable sleeve 12, which is integral with the piston 18, which is pressed against the spring 15, which balances the pressure on the piston of the working medium of the elastic suspension element. In order to obtain maximum pressure in the contour of the lower section of the crane when the contour of the upper section breaks on the glass, the piston 16 is movably attached to the stop 19 of the glass by a spring 17. The piston cavity communicates with the contour of the upper section, when pressure drops 17 the uppermost position and the lower section are controlled through the pusher 9. 1 Cp. f., 1 slug.

Description

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The invention relates to transport engineering, in particular to pneumatic brake drives of automobiles.

The purpose of the invention is to simplify the contract operation.

The drawing shows the structural scheme of the device for controlling the pneumatic brake actuator

The device contains a double-arm lever 1 for driving a brake valve, acting through a pusher 2 and a rubber spring 3 on the next piston

4 of the upper section of the crane The following piston 4 controls the double-seat valve 5, which is pressed against the valve body seat by the spring 6. In the lower section of the crane there is a piston 7, which is made behind the Hollow pusher 8c. In the internal cavities of the pusher 8 and the valve

5 there is a rod 9 fixed on the piston 4 and acting on the pusher 8 through the stop 10 at the extreme top position of the piston 7. On the surface of the pusher 8 there is fixed the central part of the membrane 11 with a variable active area o

In the movable cup 12, the valve 13 is located and is pressed against the saddle of the cup 12 by the spring 14. The cup 12 is spring-loaded by the spring 5c The movable piston 16 is spring-loaded by the spring 17. As one unit with the cup 12, the piston 18 is made, lower on the surface of the cup

emphasis 19 o

The cavity A communicates with the brake chambers of the front axle, cavity B - with the receiver. The cavity B is located above the piston 7о. The cavity D is in communication with the brake chambers of the rear axle, the cavity D is connected with the receiver. The cavity E is connected to the suspension O. The cavity J is located under the piston 16.

The device works as follows

The cavities B and D of the crane communicate with the receivers of the front and rear axle circuits, respectively. The air pressure in the cavity W, acting on the piston 16, moves it down, overcoming the force of the prulasine 17, due to which

the cup 12 is able to move freely and occupies a position in which the air pressure of the suspension in cavity E is balanced by the force of compression of the spring 16

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The drive force on the lever 1 is transmitted through the pusher 2 and the rubber rod 3 to the piston 4 of the upper section. The piston pusher 4 rests on the valve 5, separating cavity A with the atmosphere. As the piston moves further, valve 5 is detached from the housing sedp, jointly cavity B and A, whereby the pressure in cavity A increases, and, acting on piston 4, moves it up balancing the force of water and the valve 5 sits on the body seat. When the drive force decreases, the balance of forces acting on the piston 4 is disturbed, thereby raising the piston pusher.

above valve 5, communicating with A

the atmosphere. The pressure in cavity A drops and, with a steady balance of forces on the piston 4, the piston pusher again sits on valve 5, separating cavity A with the atmosphere

Thus, the pressure in cavity A is monitored in proportion to the driving force. Through the hole in the housing, air from cavity A flows into cavity B. Under the action of pressure in cavity C, the pusher 8 moves down and sits on valve 13, separating cavity G with the atmosphere

Upon further movement of the pusher, the valve 13 is detached from the saddle of the glass 12 and the air from the cavity D through the holes in the glass and opens the valve 13 enters the cavity G. By increasing the pressure p of the cavity G to the membrane 11, the pusher 8 moves upwards. the cup seat 12 and the pressure growth in the cavity D is stopped. When the pressure in cavity 13 decreases, the balance of forces created by the pressure of air on the piston 7 and the membrane 11 is disturbed, and the pusher 8 moves up, lifting above the valve 13, together with cavity G with the atmosphere. The pressure in cavity D drops, and the pusher 8, with a new equilibrium position, rests on valve 13, separating cavity D from the atmosphere. Thus, the pressure in cavity G is monitored in proportion to the pressure in cavity B

When the pressure in the pneumatic suspension (cavity E) increases, the cup 12 moves upward until pressure in cavity E is balanced by the force of compression of the spring 15. When moving the cup upward, the active area of the membrane 11 decreases, thereby disrupting the balance of pressure forces on the piston 7 and the membrane 11, which provides the opening of the valve 13, and the pressure in cavity G increases, tracking pressure on the piston 7. Similarly, when the pressure in cavity E decreases by increasing the active area of the membrane 11, the pressure in cavity G decreases.

When the contour of the upper section of the crane section breaks, the pressure in cavity B and the cavity G connected with it drops, the piston 16 moves upwards through the action of the spring 17 and pushes the canal 12 through the anvil 19, setting it to the uppermost position. The bottom section of the crane is controlled directly from the drive lever 1 through the pusher 2, the spring 3, the piston 4 and the rod 9, which is effective on the stop 10 of the pusher 9.

Claims (2)

Invention Formula one . A device for controlling a pneumatic brake actuator, comprising a brake valve having an upper control section for the first brake circuit and a lower control section for the second circuit in which the braking force regulator is integrated, with a lever in the upper section Compiled by S. Makarov Editor A. Shandor Tehred L. Serdyukop Proofreader M. Pojo Order 7461/24 Circulation 522 VNIIPI State Committee on Invention and Discovery at the USSR Committee on Scientific and Technical Information 113035, Moscow, Zh-35, 4/5 Raushsk nab. 0 five 0 five 0 a pusher acting through an elastic element on the follow- ing piston, controlling a double-seat valve, has a piston in the lower section that limits the cavity communicating with the cavity bounded by the follow- ing piston on the other side, the bulkhead with the body partition wall, and the brake force regulator includes a hollow pusher, a membrane with a variable actuating area, and a double-seated valve, which is interoperable with the hollow pusher in a movable cup, made in one piece with the piston, one of the elements The regulator is connected to an elastic suspension element, characterized in that, in order to simplify the design, the braking force regulator is built into the lower section of the brake valve, the hollow plunger is connected to the piston of the lower section of the brake valve and the central part of the diaphragm, the regulator piston is connected with the elastic element of the suspension pneumatic bond and balanced by a spring. 2. The device according to claim I, characterized in that the glass has a stop and is mounted for movement, limited by said stop, a spring-loaded piston, which is limited to a cavity communicated with the body and communicated with the entrance of the upper section of the brake valve. Subscription