CN206171494U - Brake caliper assembly - Google Patents

Abstract

The utility model relates to a brake caliper assembly, including calliper (1) and piston assembly (3). Calliper (1) is inside to be equipped with the piston chamber that is used for holding piston assembly (3), and the inner wall in piston chamber is equipped with the ring packing groove, and the ring packing inslot is equipped with rectangular seal ring (4). At least oil storage tank (41) of extending along the circumferencial direction are equipped with on rectangular seal ring (4) and piston assembly (3) outer surface contact's the inner wall, piston assembly (3) resistance when the motion can be effectively reduce like this to brake caliper's sensitivity improves. The both sides of oil storage tank (41) edge to the part at rectangular seal ring (4) edge be with the annular face (42) of piston assembly (3) surface laminating, in the sensitivity that improves brake caliper, assurance calliper assembly has good sealing performance like this.

Description

A kind of brake caliper assembly

Technical field

The utility model is related to a kind of brake caliper assembly, especially a kind of light rail braking with oil storage tank rectangular seal Calipers assembly.

Background technology

The braking procedure of light rail vehicle is more complicated than the braking procedure of general vehicle, and light rail vehicle braking is divided into seven grades, enters the station Front reduction gear is braked for one-level.Light rail vehicle before inlet parking, start working by one-level braking.One-level braking is complete by brake caliper Into.In the presence of hydraulic oil, the piston of light rail brake caliper ejects certain stroke, and brake pad is disappeared with the gap of brake disc Remove, so that subsequently what braking effect is more preferable.Certainly this also just determines sensitivity requirement of the one-level braking to brake Highest.For light rail brake caliper, sensitivity high requires the quick motion by piston to realize.Current light rail braking Clamp, using ordinary rectangular sealing ring.Light rail vehicle starts one-level when braking, in the braking operation oil pressure of 0.12MPa or so Under effect, rectangular seal is often larger with the enclasping force of piston.Moreover, piston is in motion process, rectangular seal Some is extruded in the chamfering of clamp rectangular channel, and the reversion that larger obstruction piston can be produced to move out is exerted oneself.By In these unfavorable factors, the sensitivity of brake caliper will be affected, and braking effect is often not fully up to expectations.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of light rail brake caliper with oil storage tank rectangular seal Assembly, to solve the problems, such as light rail brake caliper poor sensitivity.

In order to solve the above-mentioned technical problem, the technical scheme that the utility model is provided is as follows：

New light rail brake caliper assembly includes clamp and piston assembly；It is provided with for accommodating piston assembly inside clamp Plunger shaft, the inwall of plunger shaft is provided with annular seal groove, rectangular seal, rectangular seal and work is provided with annular seal groove The inwall of plug assembly outer surface contact is provided with least one circumferentially extending oil storage tank, and the both sides of the edge of oil storage tank are arrived The part at rectangular seal edge is the ring surface fitted with piston assembly outer surface.

The width of ring surface can be between 0.45mm ~ 0.55mm.

The width of ring surface can also be 0.5mm.

At least one circumferentially extending storage is designed on the inwall that rectangular seal is contacted with piston assembly outer surface Oil groove this structure, can reduce the fitting area of rectangular seal and piston assembly, while hydraulic oil can enter square in pressurization In the oil groove of shape sealing ring, oil film is produced between rectangular seal and piston assembly, play lubrication, reduce piston assembly Resistance in motion, so as to improve the sensitivity of brake caliper；The both sides of the edge of the oil storage tank of rectangular seal are close to rectangle The part at seal edge is ring surface this structure fitted with piston assembly outer surface, can improve brake caliper sensitivity While, it is ensured that calipers assembly possesses good sealing property.

Further, brake caliper assembly also includes hole back-up ring, support block block and support bar；Support block block is provided with one Individual ladder hole, support block block is sleeved on support bar, and the large diameter hole in ladder hole is matched somebody with somebody with the flange of support bar bottom Close；The plunger shaft bottom of clamp is provided with the blind hole one being engaged with support block block, and a gear is provided with the inwall of blind hole one Ring groove, hole is arranged in back-up ring annular groove with back-up ring, the external diameter of the internal diameter less than support block block of hole back-up ring.

Further, piston assembly includes piston dust cover, piston end cap and piston；Piston end cap is fixed on piston away from card One end of pincers, the inner ring of piston dust cover is fixed between piston end cap and piston.

Further, piston assembly also includes spring base, return spring and Rectangular Spring；One of spring base is provided with flange, Return spring is sleeved on outside spring base, the external diameter of the internal diameter less than the flange of return spring；Spring base is provided with the one of flange End is additionally provided with spring groove, and Rectangular Spring is in spring groove.

Further, piston assembly also includes catch；Piston is provided with installation spring base, return spring and square near clamp one end The mounting hole of shape spring, the one end of spring base with flange is mounted in the bottom of the mounting hole；Also set in described mounting hole There is blind hole two, support bar can be moved back and forth in blind hole two；The outside of mounting hole is additionally provided with a catch groove, and catch is installed and consolidated It is scheduled in catch groove.

Further, brake caliper assembly also includes elastic spring；The open outside of plunger shaft has an annular groove, piston dust cover Outer be enclosed within annular groove, elastic spring is buckled on the outer of piston dust cover.

Brief description of the drawings

The utility model is described in further detail with reference to the accompanying drawings and detailed description：

Fig. 1 is the structural representation of existing ordinary rectangular sealing ring；

Fig. 2 is the partial enlarged drawing of part A in Fig. 1；

Fig. 3 is the structural representation of the utility model rectangular seal；

Fig. 4 is the partial enlarged drawing of part B in Fig. 3；

Fig. 5 is the structural representation of the present embodiment brake caliper assembly；

Fig. 6 is the structural representation of the present embodiment piston assembly.

Specific embodiment

In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain The utility model, is not used to limit the utility model.

As shown in fig. 6, Rectangular Spring 12 is fitted into the spring groove 18 of spring base 13, then return spring 14 is sleeved on spring On seat 13, finally the entirety that Rectangular Spring 12, spring base 13 and return spring 14 are constituted is fitted into the mounting hole 19 of piston 11, Catch 15 is covered, and is fixed on piston 11 with cross recessed countersunk head sscrew 16；Piston dust cover 8 is enclosed within piston 11, with interior six Be fixed on piston end cap 9 on piston 11 by angle fillister head screw 10, constitutes piston assembly 3.

As shown in figure 5, being a kind of light rail brake caliper assembly with oil storage tank rectangular seal.Support bar block 6 is inserted in In support bar 7, in the blind hole 1 of the plunger shaft bottom of clamp 1, hole back-up ring 5 is snapped in the back-up ring annular groove of blind hole 1, Support bar block 6 is compressed with clamp 1, while fixing support bar 7；Rectangular seal 4 loads the annular close of the plunger shaft of clamp 1 In sealing groove；Piston assembly 3 is pressed into support bar 7, cylinder holes bottom is pressed onto, the outer of piston dust cover 8 is inserted in the groove of clamp 1, The outer of piston dust cover is fixed with elastic spring 2 again.

Light rail vehicle is braked before inlet parking using one-level, allows piston to eject certain stroke.Such as Fig. 1 and Fig. 2, if adopting With existing ordinary rectangular sealing ring 4, when certain stroke is moved in piston assembly 3, material is the rectangular seal 4 of rubber, is subject to Piston assembly 3 produces very big deformation after extruding, internal diameter working face tightly touch piston assembly 3, produces very big enclasping force.

Such as Fig. 3 and Fig. 4, the structure with oil storage tank 41 is increased in the internal diameter working face of rectangular seal 4, the hydraulic oil in pressurization Can enter in the oil storage tank 41 of rectangular seal 4, oil film is produced between rectangular seal 4 and piston assembly 3, play lubrication and make With resistance of the reduction piston assembly 3 in motion.In addition, part of the both sides of the edge of oil storage tank 41 to the edge of rectangular seal 4 It is the ring surface 42 fitted with the outer surface of piston assembly 3, within this range without oil storage tank 41, it is ensured that rectangular seal 4 is lived The plug necessary fitting area of assembly 3, so can be while brake caliper sensitivity be improved, it is ensured that calipers assembly possesses well Sealing property.

In a word, preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all Any modification, equivalent and improvement made within spirit of the present utility model and principle etc., should be included in this practicality Within new protection domain.

Claims (8)

1. a kind of brake caliper assembly, at least including clamp（1）And piston assembly（3）, the clamp（1）Inside is provided with for holding Receive piston assembly（3）Plunger shaft, the inwall of the plunger shaft is provided with annular seal groove, rectangular seal is provided with annular seal groove Circle（4）, it is characterised in that：The rectangular seal（4）With piston assembly（3）The inwall of outer surface contact is provided with least one Circumferentially extending oil storage tank（41）, the oil storage tank（41）Both sides of the edge to rectangular seal（4）The part at edge It is and piston assembly（3）The ring surface of outer surface laminating（42）.

2. according to the brake caliper assembly described in claim 1, it is characterised in that：The ring surface（42）Width be 0.45mm ~0.55mm。

3. according to the brake caliper assembly described in claim 2, it is characterised in that：The ring surface（42）Width be 0.5mm.

4. according to the brake caliper assembly described in Claims 2 or 3, it is characterised in that：Described brake caliper assembly also includes Hole back-up ring（5）, support block block（6）And support bar（7）；Described support block block（6）A ladder hole is provided with, is supported Block block（6）It is sleeved on support bar（7）On, large diameter hole and support bar in ladder hole（7）The flange of bottom coordinates；It is described Plunger shaft bottom be provided with and support block block（6）The blind hole one being engaged（17）, in blind hole one（17）Inwall be provided with one Individual back-up ring annular groove, hole back-up ring（5）In back-up ring annular groove, the hole back-up ring（5）Internal diameter be less than support block block（6） External diameter.

5. according to the brake caliper assembly described in claim 4, it is characterised in that：Described piston assembly（3）Including piston Dust cover（8）, piston end cap（9）And piston（11）；Described piston end cap（9）It is fixed on piston（11）Away from clamp（1）'s One end, described piston dust cover（8）Inner ring be fixed on piston end cap（9）With piston（11）Between.

6. according to the brake caliper assembly described in claim 5, it is characterised in that：Described piston assembly（3）Also include bullet Spring abutment（13）, return spring（14）And Rectangular Spring（12）；The spring base（13）One end be provided with flange, return spring（14） It is sleeved on spring base（13）Outside, the return spring（14）Internal diameter less than the flange external diameter；The spring base（13） The one end for being provided with flange is additionally provided with spring groove（18）, Rectangular Spring（12）Mounted in spring groove（18）In.

7. according to the brake caliper assembly described in claim 6, it is characterised in that：Described piston assembly（3）Also include gear Piece（15）；Described piston（11）Near clamp（1）One end is provided with installation spring base（13）, return spring（14）And Rectangular Spring （12）Mounting hole（19）, spring base（13）One end with flange is mounted in the mounting hole（19）Bottom；In described peace Dress hole（19）In be additionally provided with blind hole two（20）, support bar（7）Can be in blind hole two（20）Middle reciprocating motion；In the mounting hole（19） Outside be additionally provided with a catch groove, catch（15）It is mounted and fixed in catch groove.

8. according to the brake caliper assembly described in claim 7, it is characterised in that：Also include elastic spring（2）；The plunger shaft Open outside be provided with an annular groove, piston dust cover（8）Outer be enclosed within annular groove, elastic spring（2）It is buckled in piston dust-proof Cover（8）Outer on.