Spring mounting and connecting structure in plunger type brake master cylinder

Abstract

The utility model provides a spring mounting and connecting structure in a plunger type brake master cylinder, which comprises a piston rod and a spring, one end of the piston rod is provided with a first connecting groove, the spring mounting and connecting structure also comprises a spring seat sleeve, the spring seat sleeve is provided with a second connecting groove, two ends of the spring are respectively connected in the first connecting groove and the second connecting groove, and the first connecting groove and the second connecting groove are communicated with each other. The spring seat sleeve extends into the first connecting groove and is in sliding fit with the piston rod, a protruding first barb is arranged on the inner side wall of the first connecting groove, a protruding second barb is arranged on the outer side wall of the spring seat sleeve, and the second barb and the first barb are matched to limit the spring seat sleeve to be separated from the first connecting groove. One end of the spring is directly connected with the piston rod, the other end of the spring is connected with the spring seat sleeve, and meanwhile the spring seat sleeve is connected with the piston rod in a sliding mode, so that the original function can be achieved only through two parts, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to a brake master cylinder assembly in the technical field of automobile brake systems, in particular to a spring installation connection structure in a plunger-type brake master cylinder. Background Art

[0002] refer to Figure 1 As shown, a conventional plunger-type brake master cylinder for automobile braking is currently available, and its components are mainly composed of a master cylinder body 1, a first piston rod 2, a second piston rod 3, a leather cup 4, etc. The first piston rod 2 and the second piston rod 3 are arranged in the master cylinder body 1, and a leather cup 4 is arranged between the first piston rod 2 and the second piston rod 3 and the side wall of the master cylinder body 1. In the axial direction of the piston rod, springs 5 ​​are arranged between the first piston rod 2 and the master cylinder body 1, and between the first piston rod 2 and the second piston rod 3.

[0003] In the above technical solution, the two ends of the spring 5 are connected by spring seats 6 respectively, and the two spring seats 6 are connected by a guide rod 7. The above structure needs four parts (including two spring seats 6, a guide rod 5, and a spring 5). It has the problems of using many parts and complex structure. Utility Model Content

[0004] In view of the problems pointed out in the background technology, the utility model proposes a spring installation connection structure in a plunger-type brake master cylinder to solve the above technical problems.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A spring installation connection structure in a plunger-type brake master cylinder includes a piston rod and a spring, one end of the piston rod is provided with a first connecting groove, and also includes a spring seat sleeve, the spring seat sleeve is provided with a second connecting groove, the two ends of the spring are respectively connected to the first connecting groove and the second connecting groove, the spring seat sleeve extends into the first connecting groove and forms a sliding fit with the piston rod, the inner side wall of the first connecting groove is provided with a protruding first barb, the outer side wall of the spring seat sleeve is provided with a protruding second barb, and the second barb and the first barb cooperate to limit the spring seat sleeve from escaping from the first connecting groove.

[0007] The utility model is further configured that a dividing groove is provided on the side wall of the second connecting groove, and a plurality of the dividing grooves are provided, and the plurality of dividing grooves are arranged at intervals in the circumferential direction of the spring seat sleeve.

[0008] The utility model is further configured that a protruding connection seat is provided at the bottom of the first connection groove.

[0009] The utility model is further configured that a through hole is provided at the bottom of the second connecting groove.

[0010] The utility model is further configured to include a main cylinder body, in which two piston rods are arranged, the two piston rods are respectively a first piston rod and a second piston rod, the first piston rod is located on the inner side of the second piston rod, the first connecting grooves of the first piston rod and the second piston rod are respectively connected with the springs and spring seat sleeves, one of the spring seat sleeves is against the inner wall of the column cylinder body, and the other spring seat sleeve is against the first piston rod.

[0011] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0012] The utility model provides a spring installation connection structure in a plunger-type brake master cylinder, wherein one end of the spring is directly connected to the piston rod, and the other end of the spring is connected to the spring seat sleeve, while the spring seat sleeve is slidably connected to the piston rod. Thus, only two parts are needed to realize the original function, thereby making the structure simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of the prior art.

[0015] Figure 2 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] For reference Figure 1-2 The utility model is described as follows:

[0018] Embodiment 1: A spring installation connection structure in a plunger-type brake master cylinder, further comprising a master cylinder body 1, wherein two piston rods are arranged in the master cylinder body 1, the two piston rods are respectively a first piston rod 2 and a second piston rod 3, the first piston rod 2 is located inside the second piston rod 3, the inner ends of the first piston rod 2 and the second piston rod 3 are respectively provided with a first connection groove 11, and a spring 5 is arranged in the first connection groove 11. The above is the prior art, and the following is the improved technical solution of the present application:

[0019] It also includes a spring seat sleeve 12, which is cylindrical. There are two spring seat sleeves 12, which are respectively arranged on the inner sides of the first piston rod 2 and the second piston rod 3. The spring seat sleeve 12 is provided with a second connecting groove 13 opening toward the first connecting groove 11, and a through hole 18 is provided at the bottom of the second connecting groove 13. One of the spring seat sleeves 12 is against the inner wall of the main cylinder body 1, and the other spring seat sleeve 12 is against the first piston rod 2. Both ends of the spring 5 are respectively connected to the first connecting groove 11 and the second connecting groove 13. A protruding connecting seat 17 is provided at the bottom of the connecting groove 11 (the connecting seat 17 is cylindrical, and the diameter of the connecting seat 17 is equal to the inner diameter of the spring 5), the spring 5 is connected to the connecting seat 17, the spring seat sleeve 12 extends into the corresponding first connecting groove 11 and forms a sliding fit with the inner side wall of the first connecting groove 11, a protruding first barb 14 is provided on the inner side wall of the first connecting groove 11, and a protruding second barb 15 is provided on the outer side wall of the spring seat sleeve 12, and the second barb 15 and the first barb 14 cooperate to limit the spring seat sleeve 12 from escaping from the first connecting groove 11.

[0020] A dividing groove 16 is provided on the side wall of the second connecting groove 13, and a plurality of dividing grooves 16 are provided. The plurality of dividing grooves 16 are arranged at circumferential intervals of the spring seat sleeve 12, and the dividing grooves 16 are arranged through the inner and outer sides and the open end of the second connecting groove 13. In this way, when the spring seat sleeve 12 enters the first connecting groove 11, the open end of the spring seat sleeve 12 can be deformed inwardly to reduce the diameter of the open end of the spring seat sleeve 12, so that the spring seat sleeve 12 can pass over the first barb 14 and enter the second connecting groove 13. After the spring seat sleeve 12 enters the second connecting groove 13, it recovers its deformation, and the first barb 14 cooperates with the second barb 15 to form a structure that limits the spring seat sleeve 12 from escaping the first connecting groove 11.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spring mounting connection structure in a plunger-type brake master cylinder, comprising a piston rod and a spring (5), wherein one end of the piston rod is provided with a first connecting groove (11), characterized in that: The invention also comprises a spring seat sleeve (12), wherein the spring seat sleeve (12) is provided with a second connecting groove (13), the two ends of the spring (5) are respectively connected to the first connecting groove (11) and the second connecting groove (13), the spring seat sleeve (12) extends into the first connecting groove (11) and forms a sliding fit with the piston rod, the inner side wall of the first connecting groove (11) is provided with a protruding first barb (14), the outer side wall of the spring seat sleeve (12) is provided with a protruding second barb (15), and the second barb (15) cooperates with the first barb (14) to limit the spring seat sleeve (12) from slipping out of the first connecting groove (11).

2. The spring installation and connection structure in a plunger-type brake master cylinder according to claim 1, characterized in that: A dividing groove (16) is provided on the side wall of the second connecting groove (13), and a plurality of the dividing grooves (16) are provided. The plurality of dividing grooves (16) are arranged at intervals in the circumferential direction of the spring seat sleeve (12).

3. The spring installation and connection structure in a plunger-type brake master cylinder according to claim 1, characterized in that: A protruding connection seat (17) is provided at the bottom of the first connection groove (11).

4. The spring installation and connection structure in a plunger-type brake master cylinder according to claim 1, characterized in that: A through hole (18) is provided at the bottom of the second connecting groove (13).

5. The spring installation and connection structure in a plunger-type brake master cylinder according to claim 1, characterized in that: The invention also comprises a main cylinder body (1), wherein two piston rods are arranged in the main cylinder body (1), the two piston rods are respectively a first piston rod (2) and a second piston rod (3), the first piston rod (2) is located on the inner side of the second piston rod (3), the first connecting grooves (11) of the first piston rod (2) and the second piston rod (3) are respectively connected with the spring (5) and the spring seat sleeve (12), wherein one spring seat sleeve (12) is against the inner wall of the main cylinder body (1), and the other spring seat sleeve (12) is against the first piston rod (2).

Images