CN201432656Y

CN201432656Y - Hydraulic brake valve

Info

Publication number: CN201432656Y
Application number: CN2009201190506U
Authority: CN
Inventors: 张柏青
Original assignee: Zhejiang Anjie Brake Co Ltd
Current assignee: Ningbo Anjie Brake Co., Ltd.
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2010-03-31
Anticipated expiration: 2019-04-30

Abstract

The utility model discloses a hydraulic brake valve, which comprises a valve body, a piston body and a spring, and is characterized in that a first transition cavity and a second transition cavity with expanded radius are respectively arranged at both sides of a piston cavity of the valve body and are respectively communicated with an oil inlet and an oil return inlet on the valve body; a middle cavity of the piston cavity is communicated with a brake oil outlet on the valve body; a communicating groove is arranged at the middle part of the surface of the piston body; the spring is supported between the other end of the piston body and the side surface of the piston cavity; and the communicating groove on the piston body switches the communicating state of the oil return inlet and the brake oil outlet to the communicating state of the oil inlet and the brake oil outlet along with the gradual pressing down of a pedal. The hydraulic brake valve has the advantages that the structure is simple and reasonable, the input hydraulic pressure of a hydraulic pump is directly led to a brake disc, the pressure loss is small, the action time is shorter, and the braking effect is better.

Description

A kind of hydraulic brake valve

Technical field

The utility model relates to a kind of hydraulic brake valve.

Background technology

In the brake system on some engineering truck, there is the situation of brake-pressure deficiency, and causes engineering truck fast and effeciently not stop at present, brought factor leading to social instability to vehicle '.

Though the hydraulic brake valve structure design has much at present, it as the patent No. 200720113847.6 Chinese patent " a kind of brake activation valve " with accumulator, it includes the brake activation valve cylinder body, be provided with in the brake activation valve cylinder body and be distributed with piston assembly, Scotch yoke, the reaction piston assembly, and be distributed in joint on the import or export separately on the cylinder body, piston one end is connected with the push rod of band guard shield, the import of accumulator and outlet connect into the hydraulic accumulation energy loop by cooresponding export and import on pipeline and the brake activation valve, be provided with pedestal in the brake chamber of brake activation valve cylinder body, be supported with spring between the pedestal reaction piston assembly, the import that is connected accumulator on the pedestal back side and the brake activation valve cylinder body cooperates, in the pedestal cavity with the brake activation valve cylinder body on be connected braking mechanism outlet be communicated with, the valve seat that it is characterized in that described pedestal double as safety valve complement, in the valve seat outside cavity of safety valve complement check valve is installed, be connected with the cavity at the valve seat back side, the inboard cavity of the valve seat of safety valve complement is equipped with the fore-set seat, be provided with fore-set in the fore-set seat, conflicting with reaction piston and check valve respectively cooperates.It is rational in infrastructure, safe and reliable.But in order to reach safe and reliable effect, the hydraulic structure more complicated, parts are many, the cost height, and the hydraulic pressure of Hydraulic Pump input is not directly to be incorporated on the brake disc as much as possible, therebetween by complicated stream chamber design, can cause bigger loss of pressure, in-service time can also be shorter, and braking effect requires further improvement.

As the patent No. is 200510043774.3 Chinese patent " double pipe electrically-controlled trailer brake valve ", also has similar defective and problem.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of hydraulic brake valve at the present situation of prior art, it can overcome the defective that existing brake system can not be braked timely and effectively, simple and reasonable, more directly the hydraulic pressure with the Hydraulic Pump input is incorporated on the brake disc, loss of pressure is few therebetween, compare present employed brake activation valve, in-service time is shorter, and braking effect is better.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of hydraulic brake valve, it includes valve body and piston body, spring, on valve body, be distributed with oil inlet, return opening and brake noise outlet, the piston body that can horizontally slip is installed in the plunger shaft in the valve body, one end of piston body is connected with pedal assembly directly or indirectly, the position, plunger shaft both sides that it is characterized in that valve body has first adapter cavity and second adapter cavity that radius enlarges, first adapter cavity and second adapter cavity are communicated with oil inlet and return opening on the valve body respectively, and the outlet of the brake noise on the middle cavity of plunger shaft and the valve body is communicated with, the middle part on piston body surface has communication groove, support upper spring between the other end of piston body and the plunger shaft side, along with pedal is progressively depressed, communication groove on the piston body switches to the state that oil inlet is communicated with the brake noise outlet with return opening and the state that the brake noise outlet is communicated with.

As improvement, described communication groove is an annular groove, is convenient to make and use.

As improvement, described first adapter cavity and second adapter cavity are annular chambers, are convenient to make and use.

At last, the other end of described piston body is provided with spring base hole, and mounting spring is installed with convenient.

Compared with prior art, advantage of the present utility model is: adopt the single channel adjustment structure, simple and reasonable, parts are few, with low cost, the hydraulic pressure that can more directly Hydraulic Pump be imported is incorporated on the brake disc, loss of pressure is fewer therebetween, compare used brake activation valve now, in-service time is shorter, and braking effect is better, overcome the defective that existing brake system can not be braked timely and effectively, this valve is the closed core type slide-valve design, and high output pressure can reach 20.7MPa, be used as the energy storage with the size of appropriate size, they just can be at various happy formula hydraulic circuits, provide normal service brake in closed core type hydraulic circuit and the load-transducing hydraulic circuit and the emergency braking when running out of steam.

Description of drawings

Fig. 1 is one of constructional drawing of the utility model embodiment;

Fig. 2 be the utility model embodiment constructional drawing two;

Fig. 3 be the utility model embodiment constructional drawing three.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Anticipate as Figure 1-3, a kind of hydraulic brake valve, it includes valve body 1 and piston body 2, spring 3, on valve body 1, be distributed with oil inlet 1.1, return opening 1.2 and brake noise outlet 1.3, the piston body 2 that can horizontally slip is installed in the plunger shaft 1.4 in the valve body 1, one end of piston body 2 is connected with pedal assembly 4 directly or indirectly, the other end of piston body 2 is provided with spring base hole 2.2, mounting spring 3, make and support upper spring 3 between the other end of piston body 2 and the plunger shaft side, the position, plunger shaft 1.4 both sides of valve body has first adapter cavity 1.5 and second adapter cavity 1.6 that radius enlarges, first adapter cavity 1.5 and second adapter cavity 1.6 are to adopt annular chamber, and respectively with valve body 1 on oil inlet 1.1 and return opening 1.2 directly be communicated with, and the outlet of the brake noise on the middle cavity 1.7 of plunger shaft 1.4 and the valve body 1.3 directly is communicated with, the middle part on piston body 2 surfaces has communication groove 2.1, communication groove 2.1 is to adopt annular groove, along with pedal is progressively depressed, communication groove 2.1 on the piston body switches to the state that oil inlet is communicated with the brake noise outlet with return opening and the state that the brake noise outlet is communicated with.One end of piston body 2 can directly be connected with pedal assembly 4, or is connected with pedal assembly by intermediate transmission mechanism such as push rod, and these are traditional technological means.

Its working process is such: when not stepping on brake pedal, action of the spring lower piston body moves to right, and makes on the pedal assembly and lifts, and this moment, brake noise outlet and return opening communicated by communication groove, saw Fig. 1; Step brake pedal, by pedal assembly, overcome the elastic reaction of spring, piston body is moved to left, make return opening and brake noise port closing this moment, sees Fig. 2; Continue to treadle, pass through pedal assembly, further overcome the elastic reaction of spring, make piston body continue to move to left, brake noise outlet this moment and oil inlet communicate by communication groove, the oil inlet (normally Hydraulic Pump input port) that just means pressure oil to brake noise outlet open, the bigger treadle effort of input will continue the pressure that the increase brake noise exports again, till treadle effort and hydraulic pressure feedback force balance, see Fig. 3; Unclamp pedal, the application force on the pedal disappears, and valve comes back to free state.

Claims

1, a kind of hydraulic brake valve, it includes valve body and piston body, spring, on valve body, be distributed with oil inlet, return opening and brake noise outlet, the piston body that can horizontally slip is installed in the plunger shaft in the valve body, one end of piston body is connected with pedal assembly directly or indirectly, the position, plunger shaft both sides that it is characterized in that valve body has first adapter cavity and second adapter cavity that radius enlarges, first adapter cavity and second adapter cavity are communicated with oil inlet and return opening on the valve body respectively, and the outlet of the brake noise on the middle cavity of plunger shaft and the valve body is communicated with, the middle part on piston body surface has communication groove, support upper spring between the other end of piston body and the plunger shaft side, along with pedal is progressively depressed, communication groove on the piston body switches to the state that oil inlet is communicated with the brake noise outlet with return opening and the state that the brake noise outlet is communicated with.

2, hydraulic brake valve according to claim 1 is characterized in that described communication groove is an annular groove.

3, hydraulic brake valve according to claim 1 and 2 is characterized in that described first adapter cavity and second adapter cavity are annular chambers.

4, hydraulic brake valve according to claim 3 is characterized in that the other end of described piston body is provided with spring base hole, mounting spring.