CN205737503U - Apron for vacuum booster - Google Patents

Abstract

The utility model discloses a kind of apron for vacuum booster, its drip irrigation device is to include the inner ring in circular setting, outer back-up ring it has been wholely set on the outer wall of described inner ring, the end face of described outer back-up ring flushes with the end face of described inner ring, forming deformation groove between the outward-dipping flange of the other end and the sidewall of described inner shield ring of described outer back-up ring, described deformation groove is relative to being provided with ups and downs deformation lines face on the another side of the lateral wall of described inner ring.This utility model solves the existing problem that apron manufacturing cost is high, fragile, service life is short for vacuum booster.

Description

Apron for vacuum booster

Technical field

This utility model relates to a kind of vacuum booster, and in particular, it relates to a kind of skin for vacuum booster Circle.

Background technology

Vacuum booster is to utilize vacuum (negative pressure) to increase driver to put on the parts of power on pedal.Vacuum booster It is normally between brake pedal and master cylinder, for ease of installing, usual and master cylinder one assembly of synthesis, a part for master cylinder It is deep in vacuum booster housing.

Vacuum booster is mainly made up of servo vacuum air chamber and control valve.Servo vacuum air chamber is by forward and backward housing and group Become, clamped servo air chamber diaphragm between the two, servo air chamber is divided into forward and backward two chambeies.Ante-chamber leads to through vacuum check valve to be sent out Motivation inlet manifold (i.e. vacuum source), outside air enters servo air chamber back cavity after filtering ring and felt filtration ring filtering.After Equipped with control valve in the hub cylinder of chamber diaphragm seat.Control valve is made up of air cock and vacuum valve, and air cock is fixedly mounted with control valve push rod Together, the whole fork of control valve push rod secondment is connected with brake treadle mechanism.Passage A and B, passage A is had on servo cameral mantle bar For connecting servo air chamber ante-chamber and control valve, passage B is used for connecting servo air chamber back cavity and control valve.Servo vacuum air chamber work The thrust produced when making, the same with pedal force, act directly on master cylinder push rod.

When vacuum booster does not works, air cock and control valve push rod, under the effect of control valve push rod spring, leave rubber Glue reaction plate, is in extreme right position, and makes vacuum valve leave the valve seat on diaphragm seat, i.e. vacuum valve to be in unlatching shape State.And vacuum valve is pressed on air cock by valve spring, i.e. air cock is closed.Now before and after servo air chamber Two chambeies are interconnected, and and atmospheric isolation.When electromotor works, front and back two intracavity can produce certain vacuum.

During braking, brake pedal, the control from pedal gear try hard to recommend brake control valve push rod and control valve plunger to Front movement, behind the gap eliminated between plunger and rubber reaction plate, is further continued for promoting master cylinder push rod, the system in master cylinder Hydrodynamic flows into wheel cylinder with certain pressure, and this power is given by brake treadle mechanism.Meanwhile, in the effect of valve spring Under, vacuum valve moves forward the most therewith, until being pressed against on the valve seat of diaphragm seat, so that passage A and B isolation, i.e. servo gas The ante-chamber of room and back cavity completely cut off, and then air cock leaves vacuum valve and opens, and air is through filtering ring, felt filtration ring, air cock Opening and passage B be filled with servo air chamber back cavity.Along with being filled with of air, pressure differential occurs in the both sides of servo air chamber diaphragm and Producing thrust, this thrust promotes master cylinder push rod to move forward by diaphragm seat, rubber reaction plate, and this power is pressure differential institute Give.Now, the active force on master cylinder push rod is pedal force and the summation of servo air chamber reaction plate thrust, makes master cylinder The pressure of output is doubled and redoubled.

When releasing braking, control valve push rod spring makes control valve push rod and air cock move right, and vacuum valve leaves diaphragm Valve seat on seat and open.Before and after servo air chamber, two chambeies communicate, and are vacuum state.Diaphragm seat and diaphragm are at diaphragm return Return under the effect of spring, master cylinder releases braking action.

Secondary piston and back piston in vacuum booster are provided with apron, and apron is along with secondary piston and back piston Sliding and action.Being typically all of existing apron is ring-type, and its accuracy of manufacture requires height, the most easily leaks gas, so Result in manufacturing cost increase.

Utility model content

The deficiency existed for prior art, the purpose of this utility model is to provide a kind of low cost, is difficult to gas leakage And the non-damageable apron for vacuum booster.

For achieving the above object, this utility model provides following technical scheme: a kind of apron for vacuum booster, Including the inner ring in circular setting, the outer wall of described inner ring has been wholely set outer back-up ring, the end face of described outer back-up ring with The end face of described inner ring flushes, and is formed between the outward-dipping flange of the other end and the sidewall of described inner shield ring of described outer back-up ring Deformation groove, described deformation groove is relative to being provided with ups and downs deformation lines on the another side of the lateral wall of described inner ring Face.

By use technique scheme, apron slide when, the part of outer ring outward flanging by slide time Resistance can deform, and makes it have enough deformation spaces owing to having deformation groove, and the elasticity having due to itself makes It one can direct reach and set sliding, has good sealing, will not leak gas.Again because outside deformation groove is relative to described inner ring Ups and downs deformation lines face it is provided with so that the deformation part of outer ring has sufficiently large deformation on the another side of sidewall Area so that it is even if the bigger situation of deflection is not easy to be pulled or damage, its service life extends.

It is also preferred that the left be provided with arc transition portion between described deformation lines face and described inner ring.

By using technique scheme, further increase the deformation surplus between outer back-up ring and inner ring, make outer back-up ring More it is unlikely to deform and damages, extend its service life further.

It is also preferred that the left the cross section of the part of the described outward-dipping flange of outer back-up ring is triangular in shape.

By using technique scheme, the resistance suffered when of deforming upon of outer back-up ring diminishes, and it is more prone to become Shape so that the skid resistance of this apron is less, and sliding is more smooth and easy.

It is also preferred that the left the position of the described outer back-up ring opening part that is positioned at described deformation groove is provided with intilted chamfering.

By using technique scheme, further reduce the resistance suffered by the deformation of outer of outer back-up ring, because thickness The biggest, its deformation is more difficult to, and this arrangement reduces the thickness of outer back-up ring outer, and then its deformation is more prone to.

It is also preferred that the left the cross section indentation in described deformation lines face.

By using technique scheme so that the deformation part of outer ring has sufficiently large deformation area so that it is even if The situation that deflection is bigger is not easy to be pulled or damage, and its service life extends.

It is also preferred that the left the cross section in described deformation lines face is sine wave curve shape.

By using technique scheme so that the deformation part of outer ring has sufficiently large deformation area so that it is even if The situation that deflection is bigger is not easy to be pulled or damage, and its service life extends.

It is also preferred that the left the frustum little in outer imperial palace of described inner ring one end.

By using technique scheme, this apron so can be facilitated to coordinate with piston, facilitate apron to be set in piston On.

In sum, compared to prior art, this utility model has the advantages that 1. this utility model deformation are empty Between big, be hardly damaged, service life is long；2. this utility model sliding is more smooth and easy；3. this utility model is easy for installation.

Accompanying drawing explanation

Fig. 1 is the general assembly drawing of vacuum booster；

Fig. 2 is the front view of embodiment one；

Fig. 3 is the sectional view of embodiment one；

Fig. 4 is the partial sectional view of embodiment two.

In figure: 1, apron；11, inner ring；111, installing hole；12, outer back-up ring；121, outer；13, deformation groove；131, chamfering； 132, deformation lines face；133, arc transition portion；2, piston.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is described in further detail.

Embodiment one: a kind of apron 1 for vacuum booster, it is arranged on the piston 2 of vacuum booster, and (it is concrete Position sees Fig. 1).

Seeing Fig. 2 and Fig. 3, this apron 1 includes the inner ring 11 in circular setting, and inner ring 11 is provided with installing hole 111, Being wholely set outer back-up ring 12 on the outer wall of inner ring 11, the end face of outer back-up ring 12 flushes with the end face of inner ring 11, outer back-up ring Deformation groove 13 is formed, outside deformation groove 13 is relative to inner ring 11 between the outward-dipping flange of the other end and the sidewall of inner shield ring of 12 Ups and downs deformation lines face 132 it is provided with on the another side of sidewall.The cross section in this deformation lines face 132 is sine wave Curve-like, it is during the deformation that is stretched, and suffered stress is little, and owing to being the transition structure of arc, its be difficult to by Tear, so it is substantially without damage.It addition, be provided with arc transition portion 133 between deformation lines face 132 and inner ring 11, Further increase the deformation surface area of deformation groove 13, so that the inwall of deformation groove 13 is more difficult to be torn damage.

The position of the opening part that back-up ring 12 is positioned at deformation groove 13 is provided with intilted chamfering 131 outside, this chamfering 131 Setting reduce the thickness of outer 121 of outer back-up ring 12 so that it is in slipping, be more prone to deformation, so that this skin The sliding of circle 1 is more smooth and easy.Further, the cross section of outer 121 part of the outer outward-dipping flange of back-up ring 12 is triangular in shape, so Also the thickness making outer 121 is gradually increased from outside to inside, on the one hand, reduce the thickness of the outer 121 of outer back-up ring 12 so that it is Deformation it is more prone to, so that the sliding of this apron 1 is more smooth and easy in slipping；On the other hand, outer 121 is enhanced Structural strength so that it is under long-term sliding, be also not easy to be broken off.

It addition, the frustum little in outer imperial palace of inner ring 11 one end, this apron 1 so can be facilitated to be set in piston 2, make It is easier for installation.

Embodiment two: the present embodiment is with the difference of embodiment one, the cross section indentation in deformation lines face 132, This set so that it is more preferable die sinking manufacturing the mould of this apron 1 when so that it is manufacturing cost reduces.

The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (7)

1. the apron for vacuum booster, it is characterised in that: include the inner ring (11) in circular setting, described inner ring (11) outer back-up ring (12), the end face of described outer back-up ring (12) and the end face of described inner ring (11) it have been wholely set on outer wall Flush, between the outward-dipping flange of the other end and the sidewall of described inner shield ring of described outer back-up ring (12), form deformation groove (13), Described deformation groove (13) is relative to being provided with ups and downs deformation lines on the another side of the lateral wall of described inner ring (11) Face (132).

Apron for vacuum booster the most according to claim 1, it is characterised in that: described deformation lines face (132) And it is provided with arc transition portion (133) between described inner ring (11).

Apron for vacuum booster the most according to claim 1, it is characterised in that: described outer back-up ring (12) leans outward Tiltedly the cross section of the part of flange is triangular in shape.

Apron for vacuum booster the most according to claim 1, it is characterised in that: described outer back-up ring (12) is positioned at institute The position of the opening part stating deformation groove (13) is provided with intilted chamfering (131).

Apron for vacuum booster the most according to claim 1, it is characterised in that: described deformation lines face (132) Cross section indentation.

Apron for vacuum booster the most according to claim 1, it is characterised in that: described deformation lines face (132) Cross section be sine wave curve shape.

Apron for vacuum booster the most according to claim 1, it is characterised in that: described inner ring (11) one end in The frustum that outer imperial palace is little.