CN201615159U

CN201615159U - Piston type brake sub-chamber

Info

Publication number: CN201615159U
Application number: CN2010200008636U
Authority: CN
Inventors: 李传武; 王伟; 杨晓虎; 刘刚
Original assignee: Ruili Group Ruian Auto Parts Co Ltd
Current assignee: Ruili Group Ruian Auto Parts Co Ltd
Priority date: 2010-01-12
Filing date: 2010-01-12
Publication date: 2010-10-27
Anticipated expiration: 2020-01-12

Abstract

A vehicle piston type brake sub-chamber comprises a push rod, a resetting spring, an end cap and a rear cap. The front of the sub-chamber is provided with the end cap while the rear of the sub-chamber is provided with the rear cap, the end cap and the rear cap form an inner cavity of the brake sub-chamber together with a cylindrical outer wall, the push rod is arranged at the center of the inner cavity, the end of the push rod which is located in the inner cavity is a spherical surface, the spherical surface is in hinge connection with the center of the piston disposed in the inner cavity, a clamp spring is arranged at the connection position, a sealing ring is arranged between the outer edge of the piston and the cylindrical outer wall, the resetting spring is disposed between the piston and the end cap, an O-shaped sealing ring, an anti-dust cover and a filter plug are mounted on the end cap, and the filter plug is made of powder metallurgical materials.

Description

Piston type braking locellus

Technical field:

The utility model relates to a kind of vehicle piston type braking locellus, and it utilizes gas pressure to produce on piston to stablize lasting braking force realization vehicle braked, belong to vehicle braked equipment.

Background technique:

Existing vehicle braked equipment is " monofilm chip braking locellus ", shown in Fig. 1 a and 1b, mainly is made up of bonnet 1*, diaphragm 2*, push rod 3*, return spring 4*, clip 5*, front cover 6* etc.; The monofilm slice structure adopts clip with chuckings such as bonnet 1*, diaphragm 2*, front cover 6*; During work, pressurized air is entered by suction port, and gas pressure and makes push rod 3* produce certain braking force on diaphragm 2*, vehicle in travelling is produced stop or speed-down action; Diaphragm 2* is between bonnet 1* and front cover 6*, mainly convert air pressure to thrust, but, itself there is travel limits in bowl-shape diaphragm 2*, after surpassing the effective travel of diaphragm 2*, push rod power can be subjected to the pulling force from diaphragm 2*, the useful area that causes the diaphragm locellus increases along with stroke and reduces, make the locellus stroke big more and ouput force is more little, promote ouput force and just must increase the locellus useful area, the useful area of locellus is the area of front cover internal diameter and push-plate diameter mean value, and this will cause locellus boundary dimension to increase; If the user does not have timely repair and maintenance, even can cause the danger situation that to brake because of the brake wear appearance.

As shown in Figure 3, because the braking force of diaphragm type locellus is " S " type, the braking force fluctuation amplitude is bigger, can reduce the service brake effect; Leave the breathing aperture on the locellus front cover 6*, easily cause impurity to enter and corrosion return spring 4*, even damage diaphragm 2*, thereby cause that locellus lost efficacy.

Goal of the invention:

The purpose of this utility model is, a kind of vehicle piston type braking locellus is provided, and it utilizes gas pressure on piston, can produce to stablize lasting braking force and realize vehicle braked, the reliability when using to promote locellus and the Security of service brake.

The technical solution of the utility model is: a kind of vehicle piston type braking locellus comprises: push rod, return spring, end cap and bonnet; This end cap is arranged on the front portion of locellus, and bonnet is arranged on the rear portion of locellus, and the two and cylindrical outer wall constitute the inner chamber of braking locellus; Central authorities at inner chamber are provided with push rod, and the end that push rod is in the inner chamber place is a sphere shape, and the center portion of itself and piston is hinged and connected, and jump ring is equipped with in this joint; Between the outward edge of piston and cylindrical outer wall, seal ring is housed; Between piston and end cap, return spring is housed; O-ring seals and dust-proof cover and filtering plug are housed on end cap; This filtering plug is made by powdered metallurgical material.

Advantage of the present utility model is:

1, because piston type braking locellus is to utilize gas pressure on piston, can produces and stablize lasting braking force.

2, because the useful area of piston type braking locellus just equals the sectional area of inner chamber, and the useful area of existing diaphragm type locellus is the area of front cover internal diameter and push-plate diameter mean value, so, when the two has identical useful area, the piston cylinder operator profile is less than the boundary dimension of diaphragm type structure, and does not have the clip of diaphragm type next fastening, saves the installing space of car load.

3, owing to inner chamber directly is not in communication with the outside, and breathe by the filtering plug that powdered metallurgical material is made, guaranteed the turbidity test of inner chamber, improved the working life of return spring and seal ring.

4, because push rod 10 adopts the bulb transition to be connected with piston 7, can swing in any direction by bulb, can when braking, compensate the pendulum angle that break is adjusted arm, satisfy the locellus usage requirement.

Description of drawings:

Fig. 1 a is the structure cut-away view of prior art monofilm chip braking locellus;

Fig. 1 b is the right elevation of Fig. 1 a;

Fig. 2 a is that the structure of piston type braking locellus of the present utility model is analysed and observe diagrammatic sketch;

Fig. 2 b is the right elevation of Fig. 2 a;

Fig. 3 is the transfer curve of prior art;

Fig. 4 is stroke one a push rod force characteristic curve of the present utility model;

Specific embodiments:

Shown in Fig. 2 a and 2b, the utility model is the structure of piston type braking locellus, is made up of filtering plug 1, screw 2, baffle plate 3, bonnet 4, liner 5, jump ring 6, piston 7, seal ring 8, return spring 9, push rod 10, dust-proof cover 11, end cap 12, O shape circle 13, collar 14.

The front portion of described locellus is provided with end cap 12, and the rear portion of locellus is provided with bonnet 4, and the two and cylindrical outer wall constitute the inner chamber of braking locellus; Central authorities at inner chamber are provided with push rod 10, and the end that push rod 10 is in inner chamber is a sphere shape, and the center portion of itself and piston 7 is hinged and connected, and jump ring 6 is equipped with in this joint; Between the outward edge of piston 7 and cylindrical outer wall, seal ring 8 is housed; Between piston 7 and end cap 12, return spring 9 is housed; O-ring seals 13 and dust-proof cover 11 and filtering plug 1 are installed on end cap 12.

As shown in Figure 3, be the structure of monofilm chip braking locellus, as seen by the transfer curve when working pressure is 600KPa; The braking force of diaphragm type locellus is " S " type, and the braking force fluctuation amplitude is bigger, can reduce the service brake effect.

As shown in Figure 4, be the structure of piston type braking locellus, as seen by the one push rod force characteristic curve of the stroke when input air pressure is 600KPa; The piston type ouput force steadily, almost fluctuation does not change, and can provide constant braking force for car brakeing.

Claims

1. a vehicle piston type is braked locellus, and comprising: push rod, return spring, end cap and bonnet is characterized in that:

Described end cap (12) is located at the front portion of locellus, and described bonnet (4) is located at the rear portion of locellus, and the two and cylindrical outer wall constitute the inner chamber of braking locellus; Central authorities at inner chamber are provided with push rod (10), and the end that push rod (10) is in inner chamber is a sphere shape, and it is hinged and connected with the center portion of being located at the piston (7) of inner chamber, and jump ring (6) is equipped with in this joint; Between the outward edge of piston (7) and cylindrical outer wall, seal ring (8) is housed; Between piston (7) and end cap (12), return spring (9) is housed; O-ring seals (13) and dust-proof cover (11) and filtering plug (1) are installed on end cap (12).

2. vehicle piston type braking locellus according to claim 1, it is characterized in that: described filtering plug (1) is made with powdered metallurgical material.