CN201566606U

CN201566606U - Brake master pump assembly

Info

Publication number: CN201566606U
Application number: CN2009201805479U
Authority: CN
Inventors: 夏坤财
Original assignee: Wuhu Hengkun Auto Parts Co Ltd
Current assignee: Wuhu Hengkun Auto Parts Co Ltd
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2010-09-01
Anticipated expiration: 2019-11-13

Abstract

The utility model discloses a brake master pump assembly, comprising a cylinder body; a working cavity of the cylinder body is internally provided with a front piston and a rear piston in sequence; the cylinder body is provided with oil inlets and oil outlets which are communicated with the front piston and the rear piston; the positions of the oil inlets are respectively provided with oil inlet joints which are fixed by a hoop; residual valve springs and residual valve leather rings are also arranged among oil outlet joints and the oil outlets; the abutting surface of the front piston and the rear piston are fixedly connected by stroke screws; springs placed horizontally are respectively arranged among the front piston and the cylinder body and the rear piston; the two springs are respectively fixed on the cylinder body, front fixing seats arranged at the two ends of the front piston, a spring seat, and a rear fixing seat arranged at one end of the rear piston; and the other end of the rear piston and the cylinder are provided with blank caps. In the brake master pump assembly, the pistons have simple processing technique, good performance and high strength; the gaps of all the parts in the working cavity of the cylinder body have easy matching and good sealability; and simultaneously the production cost is low and the service life is long.

Description

The master brake cylinder assembly

Technical field:

The utility model relates generally to a kind of automobile brake field, relates in particular to a kind of master brake cylinder assembly.

Technical background:

Hydraulic braking master cylinder adopts braking liquid as working medium, utilize the incompressibility of liquid to produce braking and drive force, make the brake component action, reach the purpose of automobile brake, general master brake cylinder is realized by piston motion, and piston is wanted additional central control cock structure and locating dowel pin under normal reciprocating situation, therefore piston structure design, complex manufacturing, become to produce cost higher, and the overall performance of piston is low, intensity is also lower, simultaneously because the part in the master cylinder body running chamber increases, and the cumulative errors between each part are difficult to control, often cause in the cylinder body epitrochoidal chamber gap between each part too big or cooperation is too tight, thereby cause overall performance to descend, can not satisfy practical requirement.

The utility model content:

The purpose of this utility model is in order to remedy the deficiency of prior art, a kind of master brake cylinder assembly is provided, solved piston processing technology complexity, performance is low, intensity is low, the gap in the cylinder body epitrochoidal chamber between each part is not easy to cooperate problems such as poor sealing.

The utility model is achieved through the following technical solutions:

A kind of master brake cylinder assembly, include cylinder body, be provided with secondary piston and primary piston successively in the described cylinder body epitrochoidal chamber, described secondary piston, be installed with main apron in the groove at primary piston two ends respectively, secondary apron, described cylinder body is provided with two oil inlets and two oil outlets that link with secondary piston epitrochoidal chamber and primary piston epitrochoidal chamber, described oil inlet place is equipped with fuel inlet neck respectively, and fuel inlet neck is fixed by hoop, described oil outlet is combined with fuel discharge port respectively, the fuel-displaced place of fuel discharge port is combined with seal ring and dust plug, also is provided with residual valve spring and residual valve apron between described fuel discharge port and the oil outlet; It is characterized in that: described secondary piston is connected by the stroke screw retention with the interface of primary piston, be respectively equipped with horizontal spring between described secondary piston and cylinder body, the primary piston, described two springs are separately fixed on the back permanent seat that preceding permanent seat, spring perch and primary piston one end that cylinder body, secondary piston two ends be provided be provided with, and the described primary piston other end and cylinder body are provided with stifle.

During work, move the secondary piston phase front, when secondary piston master apron is sealed oil inlet, the oil inlet of primary piston, the primary piston cavity pressure raises, under the effect of back cavity pressure and rear spring application force, the promotion primary piston travels forward, promote secondary piston simultaneously and move forward, cavity pressure raises before and after making, and drg produces braking before and after realizing, when not working, under the effect of spring force, piston returns to initial position, brake off.

The utility model has the advantages that:

The utility model piston processing technology is simple, performance good, intensity is high, and the gap in the cylinder body epitrochoidal chamber between each part cooperates easily, good airproof performance, and productive costs is low simultaneously, long service life.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model left view.

The specific embodiment:

A kind of master brake cylinder assembly, include cylinder body 1, be provided with secondary piston 5 and primary piston 6 in the described cylinder body epitrochoidal chamber successively, described secondary piston 5, be installed with main apron 4 in the groove at primary piston 6 two ends respectively, 20,

secondary apron

5,21, described cylinder body 1 is provided with oil inlet and the oil outlet that links with secondary piston 5 epitrochoidal chambers and primary piston 6 epitrochoidal chambers, described oil inlet place is equipped with fuel inlet neck 13, and fuel inlet neck 13 fixes 14 by hoop, described oil outlet is combined with fuel discharge port 18, the fuel-displaced place of fuel discharge port 18 is combined with seal ring 17 and dust plug 19, also is provided with residual valve spring 15 and residual valve apron 16 between described fuel discharge port 18 and the oil outlet; Described secondary piston 5 is captiveed joint by stroke screw 9 with the interface of primary piston 6, be respectively equipped with horizontal spring 2,8 between described secondary piston 5 and cylinder body 1 and the primary piston 6, described two springs are separately fixed on the back permanent seat 10 that preceding permanent seat 3, spring perch 7 and primary piston 6 one ends that cylinder body 1, secondary piston 5 two ends be provided with are provided with, and described primary piston 6 other ends and cylinder body 1 are provided with stifle 12.

Claims

1. master brake cylinder assembly, include cylinder body, be provided with secondary piston and primary piston successively in the described cylinder body epitrochoidal chamber, described secondary piston, be installed with main apron in the groove at primary piston two ends respectively, secondary apron, described cylinder body is provided with two oil inlets and two oil outlets that link with secondary piston epitrochoidal chamber and primary piston epitrochoidal chamber, described oil inlet place is equipped with fuel inlet neck respectively, and fuel inlet neck is fixed by hoop, described oil outlet is combined with fuel discharge port respectively, the fuel-displaced place of fuel discharge port is combined with seal ring and dust plug, also is provided with residual valve spring and residual valve apron between described fuel discharge port and the oil outlet; It is characterized in that: described secondary piston is connected by the stroke screw retention with the interface of primary piston, be respectively equipped with horizontal spring between described secondary piston and cylinder body, the primary piston, described two springs are separately fixed on the back permanent seat that preceding permanent seat, spring perch and primary piston one end that cylinder body, secondary piston two ends be provided be provided with, and the described primary piston other end and cylinder body are provided with stifle.