CN2546286Y - Automatic regulating valve for space of vehicle hydraulic braker - Google Patents

Abstract

The utility model relates to a gap adjustment device of automobile brakes, in particular to an automatic gap adjusting valve of automobile hydraulic brakes, which is characterized in that the device comprises a valve cover (1), a rubber packing (2), a pressure spring (3), a piston (4) and a valve body (5), wherein, a screw hole connected with an oil transfer connecting joint is arranged on the center of the external end part of the valve cover (1); an oil duct hole is arranged in the center of the valve cover (1); the other end of the valve cover (1) is meshed with the valve body (5) to form a valve cavity; the pressure spring (2) and the rubber packing (3) are fixed on the internal end of the valve cover (1) in the valve cavity; the piston (4) is arranged on the front end of the pressure spring (2); an oil groove is arranged on the end face of the piston (4), while the end face is an internally concave sphere; a connecting stud is arranged on the central part of the front end of the valve body (5); an oil duct hole is arranged in the center of the valve body (5).

Description

The automatic play compensation valve of car hydraulic brake

One, technical field

The utility model relates to the automatic play compensation valve of a kind of lash adjusting device of car brake, particularly a kind of car hydraulic brake.

Two, background technology

In the vehicle traveling process as situations such as descending or pedestrians, for the security needs drag.During automobile brake, hydraulic brake is to send into wheel cylinder behind the pressure oil brake activation pressure, promotes brake strap again and the brake drum contact friction makes automobile brake.Because the frequent friction of brake strap and brake drum will make shoe plate wearing and tearing attenuate, and the distance between shoe plate and the brake drum is increased, and causes brake failure, and safety misadventure takes place, and often need manually adjust time-consuming, effort.For this reason, the employing that has at present lash adjusting device, when this device becomes big because of distance between shoe plate and the brake drum, but its gap of automatic compensation, but at the long or long-time glancing impact of the gradient, shoe plate and brake drum Long contact time are rubbed, when brake drum was subjected to thermoelastic distortion, het expansion made between shoe plate and the brake drum gap become big, made it the gap and dwindled but this device needs automatic compensation to compensate, intact or the end of braking situation for a long time under the gradient, also be the brake drum cooling shrinkage, when making the gap smaller between shoe plate and the brake drum, this device then can't be adjusted, can not shrink the adjustment brake clearance automatically, therefore hoof usually appears, rouse the phenomenon of dawdling, advise state thereby cause the vehicle length time to be in system, the driving difficulty seems, be unable to lift speed, increase hoof simultaneously, friction between drum has reduced their service life.

Three, summary of the invention

The purpose of this utility model be to design a kind of can automatic compensation the compensation brake clearance, can shrink brake clearance automatically again, do not have the phenomenon of dawdling between brake strap and the brake drum, make driving freely, the automatic play compensation valve of the car hydraulic brake in the service life of assurance shoe plate, brake drum.

The purpose of this utility model is to realize like this, a kind of automatic play compensation valve of car hydraulic brake, be characterized in including valve gap, rubber gasket, stage clip, piston, valve body, there is the screw that connects the oil transportation joint in the outer end central authorities of valve gap, there is oil hole at the center, the other end of valve gap and valve body engagement, the inner intrinsic stage clip and the rubber gasket of the inherent valve gap of the valve pocket of its formation, the front end of stage clip has piston, have oil groove on the piston end face, end face is interior concave spherical surface, and the front center of valve body has the connection double-screw bolt, and there is oil hole at its center

When using the utility model, hydraulic braking oil transportation joint is inserted the screw of the outside central authorities of valve gap, the valve body front end is connected with the wheel cylinder of hydraulic brake, glancing impact, brake-pressure pushes pressure oil and enters the valve pocket of adjusting valve from valve gap, promotes piston and moves to the valve body front end, after piston puts in place, pressure oil is penetrated by valve body front end centre hole through the oil groove and the end sphere of pistons end, makes the action of wheel cylinder control shoe plate realize braking.When automobile brake is removed, take-off the brake pressure, the brake strap resilience is sent back to pressure oil is reverse, the promotion piston is moved to the left, when piston props up rubber gasket, sealed the oil hole of valve gap central authorities, use oil not flow out again, thereby the distance that shoe plate is rebounded is fixed, the setting of its piston shift position in the chamber requires to set in advance according to various automobile brake sheets and the gap of rousing, and therefore makes between shoe plate and the brake drum to remain definite value.The utility model is novel can to compensate brake clearance by automatic compensation, can shrink brake clearance automatically again, gap between brake strap and the brake drum keeps definite value, does not have the phenomenon of dawdling therebetween, and running freely, braking is reliable, reduced the meaningless wearing and tearing between shoe plate and the drum, improved hoof, the service life of drum, disposable automatic compensation gap promptly mixes up as long as the air in the drg wheel cylinder has been arranged the gap.

Four, description of drawings

Accompanying drawing is a structural representation of the present utility model.

Among the figure: 1-valve gap 2-rubber gasket 3-stage clip 4-piston 5-valve body

Five, the specific embodiment

Embodiment of the present utility model is described with reference to the accompanying drawings, as shown in drawings, a kind of automatic play compensation valve of car hydraulic brake, it is characterized in that including valve gap 1, rubber gasket 2, stage clip 3, piston 4, valve body 5, there is the screw that connects the oil transportation joint in the outer end central authorities of valve gap 1, there is oil hole at the center, the other end of valve gap 1 and valve body 5 engagements, the inner intrinsic stage clip 2 and the rubber gasket 3 of the inherent valve gap 1 of the valve pocket of its formation, the front end of stage clip 2 has piston 4, have oil groove on the end face of piston 4, end face is interior concave spherical surface, and the front center of valve body 5 has the connection double-screw bolt, and there is oil hole at its center.The utility model can be arranged at the outside of car hydraulic brake wheel cylinder, also can be arranged in the wheel cylinder to use, and all can reach predetermined effect.

Claims (1)

1, a kind of automatic play compensation valve of car hydraulic brake, it is characterized in that including valve gap (1), rubber gasket (2), stage clip (3), piston (4), valve body (5), there is the screw that connects the oil transportation joint in the outer end central authorities of valve gap (1), there is oil hole at the center, the other end of valve gap (1) and valve body (5) engagement, the inner intrinsic stage clip (2) and the rubber gasket (3) of the inherent valve gap of the valve pocket of its formation (1), the front end of stage clip (2) has piston (4), have oil groove on the end face of piston (4), end face is interior concave spherical surface, the front center of valve body (5) has the connection double-screw bolt, and there is oil hole at its center.

Images