CN211009659U - Three-cavity spring brake air chamber - Google Patents

Abstract

The application relates to the field of vehicle braking systems, and discloses a three-cavity spring brake air chamber which comprises a cylinder body, a connecting seat and a fixed seat, wherein a spring cavity is formed in the cylinder body, a diaphragm cavity is arranged between the connecting seat and the fixed seat, a release piston is also connected in the cylinder body in a sliding manner, and a remote control forced release cavity is formed between the release piston and the connecting seat; the connecting seat is provided with a communicating port for communicating external gas. The scheme can conveniently realize forced release, and the parking brake can still be normally applied after the forced release.

Description

Three-cavity spring brake air chamber

Technical Field

The utility model belongs to vehicle braking system field.

Background

The spring brake air chamber is widely used for an automobile brake system, is arranged on a drive axle of an automobile and provides braking force for the automobile. It mainly consists of two parts: the diaphragm cavity is used for service braking; the spring cavity is used for auxiliary braking and parking braking, and is provided with a mechanical release mechanism to realize forced release.

When the brake chamber is adopted, when the brake failure is normally relieved, a driver and a passenger need to get off the vehicle, the screw rod is manually screwed by a tool, the screw rod is screwed out, and the parking brake spring is compressed, so that the forced relief can be realized, the operation is inconvenient, and the parking brake can not be normally applied after the forced relief.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three chamber spring brake air chambers to solve current brake air chamber and force to alleviate the operation inconvenient, and force to alleviate the problem of implementing the back unable normal parking braking of applying.

In order to achieve the purpose, the basic scheme of the utility model provides a three-cavity spring brake air chamber, which comprises a cylinder body, a connecting seat and a fixed seat, wherein a spring cavity is formed in the cylinder body, a diaphragm cavity is arranged between the connecting seat and the fixed seat, a release piston is also connected in the cylinder body in a sliding manner, and a remote control forced release cavity is formed between the release piston and the connecting seat; the connecting seat is provided with a communicating port for communicating external gas.

The design principle and the beneficial effect of the basic scheme are as follows:

when the automobile is braked in a running mode, the brake is realized by inflating the diaphragm cavity; when parking braking is carried out, pressure relief braking is carried out by utilizing the spring cavity; and when the forced relief is carried out, the remote control forced relief cavity is inflated to realize the forced relief.

When a parking brake cavity of a traditional two-cavity air chamber breaks down, a screw rod needs to be screwed down to park and relieve, and parking brake cannot be applied after the release. Considering maintainability and reusability, increase a chamber again on the basis of two chambeies air chambers, the chamber is forcibly alleviated in remote control promptly, even if the parking brake chamber is invalid, the chamber is forcibly alleviated in remote control also can replace the parking brake chamber to park the braking and alleviate to can used repeatedly.

This scheme is kept original screw rod and is alleviated the mechanism on the basis that the chamber is alleviated in the newly-increased remote control of mechanism, and remote control forces to alleviate the chamber and can normally alleviate under the condition of inefficacy in parking braking, makes remote control force to alleviate the chamber pressure boost through remote control, lets alleviate the piston and promote the piston of parking and remove to the realization is forced to be alleviated. In the process, a driver only needs to force the release cavity to perform parking braking on the vehicle through remote control, operation is convenient, and fault repairing time is greatly saved.

Meanwhile, after the forced relieving is implemented through the remote control forced relieving cavity, the parking brake spring can still normally apply parking brake; under the condition that the remote control compulsory relief cavity is invalid, mechanical relief can be performed through the screw rod, and the relief function of the air chamber is guaranteed.

The set of device can be used for automobiles and braking devices of rail transit, and only needs to be matched with corresponding forced relief air pressure according to the magnitude of braking force output by a parking braking spring.

Optionally, a seal is provided between the relief piston and the cylinder.

The sealing element can enhance and relieve the tightness between the piston and the cylinder body.

Optionally, a limiting boss is arranged on the inner wall of the cylinder body.

When in design, a limit boss is added in the cylinder body to prevent the situation that the pressure generated when the relief piston runs over an air inlet of a parking brake cavity is insufficient and cannot be relieved; when the design is released the piston and spacing boss, must guarantee to alleviate the piston and have sufficient motion stroke and make the parking brake spring alleviate.

Drawings

FIG. 1 is a schematic structural view of a three-chamber spring brake chamber according to the present invention;

FIG. 2 is a schematic structural diagram of a service braking state;

FIG. 3 is a schematic structural view of a parking brake state;

FIG. 4 is a schematic diagram of a forced mitigation state;

fig. 5 is a schematic structural view of the lock ring.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: nut 1, screw rod 2, apron 3, parking brake spring 4, cylinder body 5, parking piston 6, hollow cylinder 7, alleviate piston 8, kicking block 9, connecting seat 10, diaphragm 11, lock circle 12, fixing base 13, push rod 14, reset spring 15, intercommunication mouth 16, spring chamber 17, diaphragm chamber 18, remote control force and alleviate chamber 19.

Examples

A three-cavity spring brake air chamber is mainly composed of a cylinder body 5, a cover plate 3, a connecting seat 10, a fixed seat 13, a screw rod 2, a hollow cylinder 7, a parking piston 6, a parking brake spring 4, a release piston 8, a diaphragm 11, a locking ring 12, a push rod 14 and a return spring 15, as shown in figure 1.

The left side of cylinder body 5 passes through bolted connection with apron 3, and the right side of cylinder body 5 passes through bolted connection with connecting seat 10. The left part of the cylinder body 5 is connected with a parking piston 6 in a sliding way, a spring cavity 17 is formed between the cover plate 3 and the parking piston 6, and a parking brake spring 4 is arranged in the spring cavity 17.

The right part of the cylinder body 5 is connected with an relieving piston 8 in a sliding manner, a parking brake cavity is formed between the relieving piston 8 and the parking piston 6, the parking brake cavity is connected with an air inlet, and the air inlet is communicated with an air source through an air pipeline. A remote control forced relief cavity 19 is formed between the relief piston 8 and the connecting seat 10, a communication port 16 is formed in the side portion of the connecting seat 10, and the communication port 16 is also communicated with an air source through an air pipeline and used for inputting and discharging air, so that pressurization and pressure relief of the remote control forced relief cavity 19 are realized.

The middle part threaded connection of apron 3 screw rod 2, the left side and the 1 threaded connection of nut of screw rod 2 and through the round pin axle fixed, the right side of screw rod 2 is passed and is parked piston 6 and sliding connection in hollow cylinder 7, the left side of hollow cylinder 7 with park piston 6 interference fit and be connected. The middle part of connecting seat 10 has seted up the slip mouth, and hollow cylinder 7's right side sliding connection has kicking block 9 in the slip mouth and threaded connection, and kicking block 9 can offset with diaphragm 11 at the removal in-process.

A diaphragm 11 is arranged between the connecting seat 10 and the fixed seat 13, and a diaphragm cavity 18 is formed between the diaphragm 11 and the connecting seat 10. The connection of connecting seat 10 and fixing base 13 is installed with lock circle 12, and the structure of lock circle is as shown in figure 5, and the left and right both ends of lock circle 12 all threaded connection have a bolt (not shown in the figure), and lock circle 12 is together fixed with connecting seat 10, diaphragm 11 and fixing base 13 through the bolt.

The push rod 14 is in clearance fit with the axis of the fixed seat 13, the push rod 14 is T-shaped, and the return spring 15 is arranged between the push rod 14 and the fixed seat 13.

Rubber sealing elements, in particular O-shaped sealing rings, are arranged in the parking brake cavity, the remote control forced relieving cavity 19 and the diaphragm cavity 18. The cylinder body 5 is provided with a vent hole for pressurizing and decompressing the parking brake cavity, and the connecting seat 10 is also provided with a vent hole for pressurizing and decompressing the diaphragm cavity 18. The charging and the pressure relief of the parking brake cavity, the remote control forced relief cavity 19 and the diaphragm cavity 18 are controlled by a remote control system on the vehicle.

During the running process of the vehicle, the parking brake cavity is filled with gas, so that the parking brake spring 4 is compressed, at the moment, the remote control forced relief cavity 19 and the diaphragm cavity 18 have no air pressure, and the left side of the push rod 14 is pushed to the left side of the diaphragm cavity 18 (namely, a position close to the connecting seat 10) under the action of the return spring 15.

During service braking, as shown in fig. 2, the air pressure in the parking brake chamber is maintained, and the diaphragm chamber 18 is filled with air, so that the formed air pressure acts on the diaphragm 11 to push the push rod 14 to move rightwards, and further, output force is generated.

During parking braking, as shown in the attached drawing 3, no air pressure exists in the parking braking cavity, the remote control forced relieving cavity 19 and the diaphragm cavity 18, the parking braking spring 4 releases elastic force to act on the parking piston 6 to push the hollow cylinder 7 and the top block 9 to move rightwards, the top block 9 abuts against the push rod 14 and pushes the push rod 14 to move rightwards, and then output force is generated.

When the sealing of the parking brake chamber fails, as shown in fig. 4, gas is filled into the remote control forced release chamber 19, so that the air pressure in the remote control forced release chamber 19 is increased and the release piston 8 is pushed to move toward the parking piston 6, so that the release piston 8 contacts with the parking piston 6 and compresses the parking brake spring 4. At this time, the push rod 14 loses the jacking effect of the jacking block 9, the push rod 14 is reset under the action of the reset spring 15, and the whole device achieves relief.

If the remote control forces the seal of the relief cavity 19 to fail as well, mechanical relief is used, i.e.: the nut 1 is screwed by a spanner, the screw rod 2 is screwed out of the cover plate 3, and the parking piston 6 is driven to compress the parking brake spring 4 in the screwing-out process of the screw rod 2. At this time, the push rod 14 loses the jacking effect of the jacking block 9, the push rod 14 is reset under the action of the reset spring 15, and the whole device achieves relief.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (3)

1. The utility model provides a three chamber spring brake air chambers, includes cylinder body, connecting seat, fixing base, is formed with the spring chamber in the cylinder body, is equipped with the diaphragm chamber between connecting seat and the fixing base, its characterized in that: a release piston is also connected in the cylinder body in a sliding manner, and a remote control forced release cavity is formed between the release piston and the connecting seat; the connecting seat is provided with a communicating port for communicating external gas.

2. The three-chamber spring brake chamber of claim 1, wherein: and a sealing element is arranged between the relieving piston and the cylinder body.

3. The three-chamber spring brake chamber of claim 1, wherein: and the inner wall of the cylinder body is provided with a limiting boss.

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