CN205034102U

CN205034102U - Counter -force dish

Info

Publication number: CN205034102U
Application number: CN201520639899.1U
Authority: CN
Inventors: 边届; 周锏; 傅礼飞
Original assignee: ZHEJIANG ZHUJI WANBAO MACHINERY CO Ltd
Current assignee: Zhejiang Wanan Zhiyu Automobile Control System Co ltd
Priority date: 2015-08-24
Filing date: 2015-08-24
Publication date: 2016-02-17
Anticipated expiration: 2025-08-24

Abstract

The utility model relates to a car arresting gear specifically discloses a counter -force dish who is used for vacuum booster, counter -force dish is applied to vacuum booster, and this vacuum booster includes valve body, piston head, counter -force dish and master cylinder push rod at least, piston head and counter -force dish locate in the valve body, master cylinder push rod's one end is inlayed and is located in the valve body, master cylinder push rod inlays the tip of locating in the valve body and counter -force dish contact, counter -force dish is equipped with the counter -force dish supporting seat with the one end of master cylinder push rod contact, the at least cladding counter -force dish of counter -force dish supporting seat and the terminal surface of master cylinder contact one end and some counter -force dish's periphery, the counter -force dish supporting seat is the metal material. The utility model discloses a counter -force dish, when piston head extrusion counter -force dish caused counter -force dish to produce the shallow recessing deformation, counter -force dish itself produced great pressure, and owing to there is the protection of counter -force dish supporting seat, counter -force dish is not fragile, and life is longer, and great pressure can not conduct the valve body simultaneously, and the protection valve body is difficult to be damaged.

Description

A kind of counter-force dish

Technical field

The utility model relates to brake device for car, is specifically related to a kind of counter-force dish for vacuum booster.

Background technology

Traditional vacuum booster, counter-force dish is provided with between control cock piston head and master cylinder push rod, after stepping on brake pedal, control cock push rod orders about piston and moves to master cylinder push rod direction, behind the gap that control cock piston head is eliminated with counter-force dish, make counter-force dish produce indentation formation, and then promote master cylinder push rod motion.In the process, its counter-force dish inside is by very large pressure, and pressure conduction is to valve body simultaneously, because the valve body of counter-force dish and installation counter-force dish is non-metallic material, is very easily damaged, thus affects performance.

Summary of the invention

The technical problems to be solved in the utility model solves the defect that in prior art, counter-force dish friction force is larger, easy to wear and deformation pressure loss is larger.

In order to solve the problems of the technologies described above, the technical scheme that the utility model provides is as follows: a kind of counter-force dish, described counter-force dish is applied to vacuum booster, this vacuum booster at least comprises valve body, piston head, counter-force dish and master cylinder push rod, described piston head and counter-force dish are located in valve body, one end of described master cylinder push rod is embedded in valve body, the end that described master cylinder push rod is embedded in valve body contacts with counter-force dish, it is characterized in that, one end that described counter-force dish contacts with master cylinder push rod is provided with counter-force dish supporting seat, the at least coated counter-force dish of described counter-force dish supporting seat contacts the end face of one end and the periphery of part counter-force dish with master cylinder, described counter-force dish supporting seat is metal material.

Further, the material of described counter-force dish supporting seat is steel plate.

Counter-force dish of the present utility model; its counter-force dish is provided with the counter-force dish supporting seat of metal material; this counter-force dish supporting seat is coated, and counter-force dish contacts end face and the part-circular periphery face of one end with master cylinder push rod; when piston head extruding counter-force dish causes counter-force dish to produce indentation formation, counter-force dish itself produces larger pressure, owing to there being the protection of counter-force dish supporting seat; counter-force dish is not fragile; longer service life, larger pressure can not be transmitted to valve body simultaneously, and protection valve body not easily damages.

Accompanying drawing explanation

Structural representation under Fig. 1 state that to be a kind of vacuum booster close at vacuum passage and choker relief valve simultaneously;

Fig. 2 is the part sectional view of vacuum booster shown in Fig. 1;

Fig. 3 is the connection diagram of inner spring seat and control cock in vacuum booster shown in Fig. 1;

Fig. 4 is the B of vacuum booster shown in Fig. 1 portion close-up schematic view;

Fig. 5 is the A of vacuum booster shown in Fig. 1 portion close-up schematic view;

Fig. 6 for vacuum booster shown in Fig. 1 open at vacuum passage, structural representation under choker relief valve closed condition;

Fig. 7 is the C of vacuum booster shown in Fig. 6 portion close-up schematic view;

Fig. 8 is the structural representation of vacuum booster shown in Fig. 1 under vacuum passage closedown, choker relief valve open mode;

Fig. 9 is the D of vacuum booster shown in Fig. 8 portion close-up schematic view;

Figure 10 is the structural representation in the portion of E shown in Fig. 1;

Figure 11 is the structural representation of the present embodiment counter-force dish.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

In description of the present utility model, it will be appreciated that, term " on ", D score, "front", "rear", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, connect integratedly, also can be removably connect; It can be the connection of two element internals; Can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, particular case can understand the concrete meaning of above-mentioned term in the utility model.

As shown in Figure 1 and Figure 2, a kind of vacuum booster comprises housing 10, piston plate 20, diaphragm 30, valve body 40, control cock push rod 50, piston 60, master cylinder push rod 70, piston head 90 and counter-force dish 100.Wherein enclosure interior space is divided into ante-chamber 11 and back cavity 12 by piston plate 20 and diaphragm 30.Wherein ante-chamber 11 is communicated with the induction maniflod of transmitting set through vacuum check valve, and back cavity 12 is communicated with by the vacuum passage 200 being located at valve body 40 inside.Its housing 10 is also provided with and runs through ante-chamber 11 and back cavity 12 flies bar 110.

Further, direction as shown shown in Fig. 1, Fig. 2, the left end of valve body 40 is fixedly connected with piston plate 20 with diaphragm 30, being provided with the cavity for holding the parts such as control cock push rod 50, piston 60, master cylinder push rod 70, piston head 90 and counter-force dish 100 in valve body 40 inside, between master cylinder push rod 70 and the housing 10 at ante-chamber 11 place, being provided with pull back spring 80.The front end of control cock push rod 50 is connected with piston 60, between its control cock push rod 50 and piston 60, be also provided with choker relief valve 130, and this choker relief valve 130 is communicated with back cavity 12, and controls opening and closing by control cock 120.The front end of its piston 60 is provided with piston head 90, and the left side of this piston head 90 is provided with counter-force dish 100, under initial condition, is provided with certain gap between piston head 90 and counter-force dish 100.The part that left end and the master cylinder push rod 70 of its counter-force dish 100 embed valve body 40 inside is connected.

Further, the control cock 120 for pilot air valve 130 and vacuum passage 200 opening and closing is connected for floating type with control cock push rod 50.It is concrete that also comprise inner spring seat 140 and outer spring seat 150, wherein inner spring seat is fixedly installed in the cavity of valve body 40 as shown in Figure 2 and Figure 3, and radial seal; Outer spring seat 150 is fixedly arranged on the right-hand member of control cock push rod 50.Be provided with control cock outer spring 160 between spring perch 140 and outer spring seat 150 within it, this control cock outer spring 160 is preferably conical compression spring.

Further, as shown in Figure 3, control cock inner spring 170 is provided with between inner spring seat 140 and control cock 120.Correspondingly, inner spring seat 140 is provided with the circular step 1 installing control cock inner spring 170, control cock 120 is provided with the circular step two 172 corresponding with circular step 1, and its control cock inner spring 170 is installed between circular step 1 and circular step 2 172.Within it the left end of spring perch 140 also establishes annular groove 41, its control cock 120 is provided with the Plug Division 121 adapted with annular groove 41, this Plug Division 121 is inserted in annular groove 41, and removable at the axial direction of annular groove 41, the inner wall sealing of radial direction and annular groove 41.

As shown in Figure 3, Figure 4, the right-hand member of inner spring seat 140 is step-like structure, and comprise First terrace 141 and second step face 142, wherein the stepped diameters at place, second step face 142 is greater than the stepped diameters at First terrace 141 place.Accordingly, annular recess is provided with at valve body 40 right-hand member inwall, this annular recess has the 3rd step surface 173,3rd step surface 173 and First terrace 141 and the outside face of inner spring seat 140, the inside face of annular recess form annular seal space 190 jointly, and the right-hand member end face of valve body 40 is located by second step face 172.In sealing chamber 190, be provided with O-ring seals 180, compared with conventional seals structure, sealing mode is separated with control cock, the impact of uncontrolled valve motion, and is convenient to during assembling install seal ring.

The vacuum booster principle of work of the present embodiment is as follows:

Under initial condition, as shown in Figure 6, specifically as shown in I and II in Fig. 7, vacuum passage 200 and control cock 120 are in contactless state, i.e. open mode to the structure of vacuum booster; And choker relief valve 130 contacts with control cock 120, be in closed condition.In this case, ante-chamber 11 is communicated with back cavity 12, because ante-chamber 11 is communicated with the induction maniflod of transmitting set, when transmitting set runs, is vacuum state in ante-chamber 11 and back cavity 12.

After stepping on brake pedal, control cock push rod drives piston 60 and piston head 90 to left movement by the effect of treadle effort, after eliminating the gap between piston head 90 and counter-force dish 100, when piston head 90 extrudes the center of counter-force dish 100, counter-force dish 100 produces indentation deformation, and then promote master cylinder push rod 70 to left movement, compression retracteding position spring 80, makes master brake cylinder hydraulic pressure rise and imports each wheel cylinder into, produce braking force.

At control cock push rod 50 to while left movement, drive outer spring seat 150 affixed with it to left movement, and compression control valve outer spring 160.Promote piston 60 in the process of left movement at control cock push rod 50, choker relief valve 130, to left movement, discharges the pressure to control cock 120.Now, under the effect of control cock inner spring 170 restoring force being in compressive state, order about control cock 120 to left movement, until contact with vacuum passage 200, limited the axial location of control cock 120 by vacuum passage 200, now vacuum passage 200 is in closed condition.In the process of push down on the pedal, first the state that as shown in Figure 7 vacuum passage 200 is opened, choker relief valve 130 is closed, move to the state that in Fig. 5, III shown vacuum passage 200 is all closed with choker relief valve 130, in this case, the axial location of the relative valve body 40 of control cock 120 no longer moves, and piston 60 continues to left movement under the thrust of control cock push rod 50, and then choker relief valve 130 and control cock 120 are departed from, namely as IV shown vacuum passage 200 in Fig. 9 close, V shown choker relief valve 130 open mode.In this case, ante-chamber 11 is mutually isolated with back cavity 12, be still vacuum state, but as shown by the arrows in Figure 9, air enters back cavity 12 by choker relief valve 130, make the pressure of back cavity 12 be greater than the pressure of ante-chamber 11 in ante-chamber 11.Under the effect of difference of pressure, drive piston plate 20 and valve body 40 to left movement by diaphragm 30, increase the thrust of master cylinder push rod 70, thus play power-assisted effect, increase braking force.

After loosen the brake, order about choker relief valve 130, piston 60 and control cock push rod 50 by the screen resilience of pull back spring 80 and control cock outer spring 160 to move right, now choker relief valve 130 moves right with contacting and promote control cock 120, control cock inner spring 170 is made to be in compressive state, until return to the state shown in Fig. 7.

In the process stepping on brake pedal and loosen the brake, owing to being non-ly be fixedly connected with relation between control cock 120 with control cock push rod 50, control cock push rod 50 only needs driven plunger and choker relief valve to left movement, control cock is then under the effect of control cock inner spring restoring force, automatically to left movement, until close vacuum passage.This structure makes the power stepping on brake pedal slighter, and the alerting ability of part is better, and the traveling comfort of steerman is better.

As the improvement of the present embodiment, as shown in Figure 10, Figure 11, one end that the counter-force dish 100 of the present embodiment contacts with master cylinder push rod 70 is provided with counter-force dish supporting seat 101, the at least coated counter-force dish 100 of this counter-force dish supporting seat 101 contacts the end face of one end and the periphery of part counter-force dish with master cylinder push rod, this counter-force dish supporting seat is metal material, is preferably steel plate.When piston head extruding counter-force dish causes counter-force dish to produce indentation formation, counter-force dish itself produces larger pressure, owing to there being the protection of counter-force dish supporting seat; counter-force dish is not fragile; longer service life, larger pressure can not be transmitted to valve body simultaneously, and protection valve body not easily damages.

In a word; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims

1. a counter-force dish, described counter-force dish is applied to vacuum booster, this vacuum booster at least comprises valve body, piston head, counter-force dish and master cylinder push rod, described piston head and counter-force dish are located in valve body, one end of described master cylinder push rod is embedded in valve body, the end that described master cylinder push rod is embedded in valve body contacts with counter-force dish, it is characterized in that, one end that described counter-force dish contacts with master cylinder push rod is provided with counter-force dish supporting seat, the at least coated counter-force dish of described counter-force dish supporting seat contacts the end face of one end and the periphery of part counter-force dish with master cylinder, described counter-force dish supporting seat is metal material.

2. according to counter-force dish according to claim 1, it is characterized in that, the material of described counter-force dish supporting seat is steel plate.