CN201646707U

CN201646707U - General pump of hydraulic brake

Info

Publication number: CN201646707U
Application number: CN2010201055352U
Authority: CN
Inventors: 许建岗
Original assignee: NINGBO YINZHOU YULI ELECTRICAL MACHINERY PLANT
Current assignee: NINGBO YINZHOU YULI ELECTRICAL MACHINERY PLANT
Priority date: 2010-01-27
Filing date: 2010-01-27
Publication date: 2010-11-24
Anticipated expiration: 2020-01-27

Abstract

The utility model discloses a general pump of a hydraulic brake, which comprises a pump body (2), and an oil cup (3), a plunger (12) and a supporting seat (11) arranged on the pump body (2), wherein the pump body (2) is provided with a plunger chamber (13); the plunger (12) is arranged in the plunger chamber (13) in a way that the plunger (12) is in sliding fit with the plunger chamber (13); a pushing sleeve (9) is sleeved at one end of the plunger (12); the pushing sleeve (9) is arranged in the supporting seat (11) in a way that the pushing sleeve (9) is in sliding fit with the supporting seat (11); the supporting seat (11) is detachably connected inside the plunger chamber (13) of the pump body (2); and a boss (10) with the radial cross section thereof being in the shape of an equilateral polygon is formed on the end surface at the opening of supporting seat (11), which faces the pump body (2). Based on the structure, all an assembler needs to do for easily and conveniently screwing the supporting seat into the plunger chamber of the pump body when the supporting seat is assembled is sleeve the socket wrench that is most frequently and most generally used on the boss, thus greatly improving the production efficiency of assembly.

Description

Hydraulic brake master cylinder

Technical field

The utility model relates to the accessory field of the vehicle, specifically is a kind of hydraulic brake master cylinder that is applied in motor bike or the electric bicycle brake system.

Background technology

At present, the brake system on motor bike or the Electrical Bicycle generally adopts hydraulic brake system, and it is made up of operating handle, hydraulic brake master cylinder, transport pipe, wheel cylinder, friction lining and brake disc usually.The hydraulic brake master cylinder of prior art comprises the pump housing, plunger, retracing spring and lubricating cup again, plunger is slidingly fitted in the pump housing, the plunger front end is connected with nut in being fixed on the pump housing by retracing spring, its rear end is linked in the pushes against sleeve, pushes against sleeve is slidingly fitted in the supporting seat, and supporting seat is threaded in the pump housing.This supporting seat plays two effects, and the first is supported in the pump housing pushes against sleeve, and it two is restriction seal rings on the plunger, prevents that seal ring from moving axially.And the structure of supporting seat of the prior art is generally a flat cylinder, and the outside thread for matching with pump housing negative thread on its outer circumference surface is shaped on plural aperture on the one end face.But there is following shortcoming in the supporting seat of this structure: because it is in being installed to the pump housing time, need use special tool, as have a spanner of two or more claws, this special tool is very special, commonality is not strong, and also cumbersome effort, the production efficiency of influence assembling greatly when using.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of easy to assembly, the hydraulic brake master cylinder that can enhance productivity greatly.

For solving the problems of the technologies described above, a kind of hydraulic brake master cylinder that the utility model provides, comprise the pump housing, be located at lubricating cup, plunger and supporting seat on the pump housing, the described pump housing has plunger cavity, plunger is slidingly fitted in the plunger cavity, one end of described plunger is sheathed with pushes against sleeve, described pushes against sleeve is slidingly fitted in the supporting seat, supporting seat is removable to be connected in the plunger cavity of the pump housing, described supporting seat has boss on the end face of the opening part of the pump housing, the radial section of described boss is an equilateral polygon.

After adopting above structure, the utility model compared with prior art, have the following advantages: when the assembling supporting seat, because supporting seat has the boss that radial section is an equilateral polygon, the assembler can use the most frequently used general-duty socket wrench just can very light, easily supporting seat to be tightened onto in the plunger cavity of the pump housing, thus production efficiency when improving assembling greatly.

As improvement, described equilateral polygon is a regular hexagon.Adopt this orthohexagonal structure, employed instrument has more commonality when making assembling.

As further improvement, have spool chamber in the described plunger, be sliding combined with spool in the spool chamber; The bottom of described pushes against sleeve has through hole, and flush fit has gland in the through hole, and an end of spool is enclosed within the end of spring, and the other end of spring is enclosed within gland and stretches on the interior end of pushes against sleeve.After adopting this structure, make the location of spring more accurate, avoided in use because nothing is located the spring inclination that produces, thereby caused the stuck phenomenon of spool in the plunger, cause brake failure then.

Description of drawings

Fig. 1 is the structural representation of supporting seat in the prior art hydraulic brake master cylinder;

Fig. 2 is the structural representation of the utility model hydraulic brake master cylinder

Fig. 3 be among Fig. 2 A to structural representation.

Wherein: prior art: 11 ', supporting seat; 111 ', aperture;

The utility model: 1, retracing spring; 2, the pump housing; 3, lubricating cup; 4, spool; 5, spring; 6, through hole; 7, gland; 8, operating handle; 9, pushes against sleeve; 10, boss; 11, supporting seat; 12, plunger; 13, plunger cavity; 14, spool chamber.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

By the structural representation of supporting seat in the prior art hydraulic brake master cylinder shown in Figure 1 as can be known, supporting seat 11 ' is a flat cylinder, on its outer circumference surface be with the pump housing in the outside thread of threads engaged, be shaped on plural aperture 111 ' on the one end face.It need be used special tool, as have the spanner of two or more claws in being installed to the pump housing time, stretch into the claw on the spanner in the aperture 111 ' after, rotating spanner again.

By the structural representation of Fig. 2, the utility model hydraulic brake master cylinder shown in Figure 3 as can be known, it comprises operating handle 8, the pump housing 2, retracing spring 1, is located at lubricating cup 3, plunger 12 and supporting seat 11 on the pump housing 2, the described pump housing 2 has plunger cavity 13, and plunger 12 is slidingly fitted in the plunger cavity 13.One end of described retracing spring 1 pushes against in the end of plunger cavity 13, and the other end pushes against the end at plunger 12.One end of described plunger 12 is sheathed with pushes against sleeve 9, and described pushes against sleeve 9 is slidingly fitted in the supporting seat 11, and supporting seat 11 is removable to be connected in the plunger cavity 13 of the pump housing 2.Described supporting seat 11 has boss 10 on the end face of the opening part of the pump housing 2, the radial section of described boss 10 is a regular hexagon.

Have spool chamber 14 in the described plunger 12, be sliding combined with spool 4 in the spool chamber 14.The bottom of described pushes against sleeve 9 has through hole 6, and flush fits have gland 7 in the through hole 6, and an end of spool 4 is enclosed within the end of spring 5, and the other end of spring 5 is enclosed within gland 7 and stretches on the end in the pushes against sleeve 9.

During assembling, only need to be enclosed within outside the boss of supporting seat with hexagon socket spanner in prevailing, the rotational sleeve spanner can be screwed into supporting seat in the pump housing then.

The boss that the utility model is not limited to above-described supporting seat is a regular hexagon, and it can also be square, regular pentagon, and correspondingly socket wrench also needs to be interior four jiaos of socket wrenchs, interior five jiaos of socket wrenchs.These variations all fall within the utility model protection domain.

Claims

1. hydraulic brake master cylinder, comprise the pump housing (2), be located at the lubricating cup (3) on the pump housing (2), plunger (12) and supporting seat (11), the described pump housing (2) has plunger cavity (13), plunger (12) is slidingly fitted in the plunger cavity (13), one end of described plunger (12) is sheathed with pushes against sleeve (9), described pushes against sleeve (9) is slidingly fitted in the supporting seat (11), supporting seat (11) is removable to be connected in the plunger cavity (13) of the pump housing (2), it is characterized in that: described supporting seat (11) has boss (10) on the end face of the opening part of the pump housing (2), the radial section of described boss (10) is an equilateral polygon.

2. hydraulic brake master cylinder according to claim 1 is characterized in that: described equilateral polygon is a regular hexagon.

3. hydraulic brake master cylinder according to claim 1 is characterized in that: have spool chamber (14) in the described plunger (12), be sliding combined with spool (4) in the spool chamber (14); The bottom of described pushes against sleeve (9) has through hole (6), and the interior flush fit of through hole (6) has gland (7), and an end of spool (4) is enclosed within the end of spring (5), and the other end of spring (5) is enclosed within gland (7) and stretches on the interior end of pushes against sleeve (9).