CN205260672U

CN205260672U - Centre valve formula clutchmastercylinder

Info

Publication number: CN205260672U
Application number: CN201520962109.3U
Authority: CN
Inventors: 李占先; 白小龙; 班中; 张显; 吴向杰; 王炜
Original assignee: Zhengzhou Nissan Automobile Co Ltd
Current assignee: Zhengzhou Nissan Automobile Co Ltd
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2016-05-25
Anticipated expiration: 2025-11-27

Abstract

The utility model discloses a centre valve formula clutchmastercylinder, including the pump body, set up the centre valve of hydraulic pressure intracavity disk seat and case, with the terminal piston push rod who links to each other of case, setting are in centre valve disk seat bottom with return spring between the casing of hydraulic pressure chamber and set up the annular of centre valve disk seat opening part along and utensil notched ring type seal between the piston push rod, the recess bottom is located piston push rod one side, be provided with logical groove on the centre valve disk seat annular edge. The utility model discloses filling fluid pressure can eliminate effectively that new car rolls off the production line among the test procedure owing to resulting in sealing washer compressed, the centre valve both sides not to have the symptom that clutch that the pressure differential causes lost efficacy greatly.

Description

Center valve type clutch general pump

Technical field

The utility model relates to automobile engine clutch system technical field, especially relates to a kind of center valve type clutch general pump.

Background technology

Automobile engine clutch system is mainly used in cutting off power transmission, realizes engage a gear function. As shown in Figure 1, clutch general pump mainly comprises the centre valve valve seat and spool, the piston push rod being connected with spool end that are arranged in hydraulic cavities, be arranged on the return spring between centre valve valve seat bottom and hydraulic cavities housing and be arranged on the reeded O-ring seal of tool between annular edge and the piston push rod of centre valve valve seat opening part, the groove left-hand of sealing circle arranges, and bottom portion of groove is near piston push rod one side. Wherein, centre valve is the core component of clutch general pump, and hydraulic cavities is divided into two chambers in left and right by it, when piston push rod is during to left movement, centre valve cuts out, and left chamber's hydraulic pressure raises, liquid enters booster, and booster work realizes clutch separation (as shown in Figure 2). C16A vehicle and the DFPK vehicle of Zhengzhou Nissan all adopt above-mentioned center valve type clutch general pump at present, roll off the production line in test process at new car, find easily to occur stepping on clutch after clutch not return, need to place approximately after one hour could normal work phenomenon. By analysis, find to occur that above problem is because in hydraulic cavities when filling liquid, sealing ring is radially pushed compression by highly pressurised liquid, cause left and right chamber effectively not isolated, piston push rod is during to left movement, even if centre valve cuts out, left chamber still can not normally boost, clutch cisco unity malfunction (as shown in Figure 3).

Summary of the invention

The utility model provides a kind of center valve type clutch general pump, and object is to solve new car and rolls off the production line that clutch return in test process lags behind, the failure problems of temporary transient cisco unity malfunction.

For achieving the above object, the utility model can be taked following technical proposals:

Center valve type clutch general pump described in the utility model, comprise the pump housing, be arranged on centre valve valve seat and spool, the piston push rod being connected with described spool end in hydraulic cavities, be arranged on the return spring between described centre valve valve seat bottom and described hydraulic cavities housing and be arranged on the reeded O-ring seal of tool between annular edge and the described piston push rod of centre valve valve seat opening part, described bottom portion of groove is positioned at piston push rod one side, and described centre valve valve seat annular is provided with groove on edge.

Described groove is the gap structure of described centre valve valve seat annular along edge.

Described groove is 1-4.

The center valve type clutch general pump that the utility model provides, on the annular edge of its center valve base opening part, be provided with groove, when piston push rod is during to left movement, liquid in left chamber enters in o-ring groove by this groove, under fluid pressure effect, the rapid spreading of sealing ring is also realized sealing function, and in left chamber, hydraulic pressure raises gradually, and clutch is normally worked. Center valve type clutch general pump of the present utility model, can effectively eliminate new car and roll off the production line in test process because filling liquid pressure causes greatly the phenomenon of the failure that sealing ring is compressed, lost efficacy without the caused clutch of pressure differential in centre valve both sides.

Brief description of the drawings

Fig. 1 is the structural representation of existing center valve type clutch general pump.

Fig. 2 is the schematic diagram of existing center valve type clutch general pump while normally working.

Schematic diagram when Fig. 3 is existing center valve type clutch general pump non-normal working.

Fig. 4 is structural representation of the present utility model.

Fig. 5 is the structural representation of the utility model centre valve valve seat.

Fig. 6 is the profile of Fig. 5.

Fig. 7 is that the A of Fig. 6 is to view.

Fig. 8 is that the B-B of Fig. 6 is to cutaway view.

Fig. 9 is the schematic diagram of the utility model while normally working.

Detailed description of the invention

As Figure 4-8, center valve type clutch general pump described in the utility model, the annular that comprises the pump housing 1, is arranged on centre valve valve seat 3 and spool 4, the piston push rod 5 being connected with spool 4 ends in hydraulic cavities 2, is arranged on the return spring 6 between centre valve valve seat 3 bottoms and hydraulic cavities 2 housings and is arranged on centre valve valve seat 3 opening parts along 7 and piston push rod 5 between the O-ring seal with groove 89, the groove 8 left-hand settings of sealing circle 9, groove 8 bottoms are near piston push rod 5 one sides, and the annular of centre valve valve seat 3 opening parts is along being provided with groove 10 on 7. Groove 10 is positioned at the annular of centre valve valve seat 3 opening parts along 7 edges, forms nick shaped, is convenient to liquid from this circulation. In addition, also can be near annular along 7 inner settings, form the through hole of the shape such as circular, square. In order to increase liquid communication amount, and make uniform liquid pass through groove 10, above-mentioned groove 10 is traditionally arranged to be 1-4, and is evenly distributed on the surface of annular along 7.

As shown in Figure 9, when use, by the liquid injection hole above right chamber 2b, to the interior injection highly pressurised liquid of hydraulic cavities 2, highly pressurised liquid enters the 2a of left chamber along the gap between sealing ring 9 and hydraulic cavities 2 sidewalls. Because filling pressure is larger, be generally 4bar left and right, therefore, sealing ring 9 is radially pushed compression by highly pressurised liquid, causes left and right chamber by fluid connection, can not effectively be isolated. Now, piston push rod 5 is to left movement, and in the 2a of left chamber, centre valve valve seat 3 annulars are along the instantaneous rising of pressure at 7 places, and liquid enters along groove 10 in the groove 8 of sealing ring 9, and under fluid pressure effect, the rapid spreading of sealing ring 9 recovers sealing function. Along with piston push rod 5 to left movement, the hydraulic pressure in the 2a of left chamber raises gradually, clutch is normally worked.

The utility model Jin Dui center valve base has carried out less improvement, has eliminated the clutch failure phenomenon that the vehicle that rolls off the production line causes because sealing ring is compressed, drops into littlely, and output is large, has improved complete vehicle quality, has promoted corporate image.

Claims

1. a center valve type clutch general pump, comprise the pump housing, be arranged on centre valve valve seat and spool, the piston push rod being connected with described spool end in hydraulic cavities, be arranged on the return spring between described centre valve valve seat bottom and described hydraulic cavities housing and be arranged on the reeded O-ring seal of tool between annular edge and the described piston push rod of centre valve valve seat opening part, described bottom portion of groove is positioned at piston push rod one side, it is characterized in that: described centre valve valve seat annular is provided with groove on edge.

2. center valve type clutch general pump according to claim 1, is characterized in that: described groove is the gap structure of described centre valve valve seat annular along edge.

3. center valve type clutch general pump according to claim 1, is characterized in that: described groove is 1-4.