CN211175136U - Novel drum brake wheel cylinder structure - Google Patents
Novel drum brake wheel cylinder structure Download PDFInfo
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- CN211175136U CN211175136U CN201921470692.0U CN201921470692U CN211175136U CN 211175136 U CN211175136 U CN 211175136U CN 201921470692 U CN201921470692 U CN 201921470692U CN 211175136 U CN211175136 U CN 211175136U
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- cylinder body
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Abstract
The utility model discloses a novel drum brake wheel cylinder structure. The top of the cylinder body is provided with an air vent and an oil inlet, through holes are symmetrically formed in two ends of the cylinder body to form an inner cavity, two piston assemblies are symmetrically arranged in the inner cavity and are connected through a spring, and each piston assembly comprises a leather cup, a piston and a shield; two pistons of two piston assemblies are all installed in the cylinder inner cavity, and annular groove is seted up to two pistons, installs the leather cup in the annular groove, and the piston passes through sealing connection between leather cup and the cylinder inner cavity inner wall, and annular leather cup groove is seted up to the leather cup, and connecting spring between two pistons, spring mounting are in the central blind hole of two pistons, and two piston outer ends are directly connected and form elasticity rigid coupling through guard shield and cylinder body outer port. The utility model discloses in, the spring is fixed in the middle of the hole of two pistons, and on the inner wall of cylinder body can not fallen yet to the spring when the piston outwards struts, the contact friction noise that has avoided spring and cylinder body produced.
Description
Technical Field
The utility model relates to a car wheel cylinder structure especially provides a novel drum brake wheel cylinder structural design.
Background
Generally speaking, in a general brake design, a piston in a wheel cylinder is not designed with a middle opening, a cylindrical protrusion is designed in the middle of a piston plane at the position where the piston is matched with a spring, so that the spring is fixed, the piston can gradually move outwards along with the abrasion of a brake friction plate, finally the spring loses a fixed point between two pistons in a cylinder body and falls on the inner wall of the cylinder body to be in moving contact with the cylinder body, and the design can cause the potential risk that the spring scrapes noise on the inner wall of the cylinder body.
Therefore, it is necessary to design a new wheel cylinder to ensure the normal operation of the wheel cylinder and avoid the risk of metal scraping noise.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims at designing out a novel wheel cylinder, solve and move between spring and the cylinder body and produce the metal friction noise, and simple to operate, the function is reliable.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model mainly comprises a cylinder body, a spring and a piston assembly; the top of the cylinder body is provided with an air vent and an oil inlet, through holes are symmetrically formed in two ends of the cylinder body to form an inner cavity, two piston assemblies are symmetrically arranged in the inner cavity and are connected through a spring, and each piston assembly comprises a leather cup, a piston and a shield; two pistons of two piston assemblies are all installed in the cylinder inner cavity, annular grooves are formed in the outer peripheral faces of the inner end portions of the two pistons, leather cups are installed in the annular grooves, the pistons are connected with the inner wall of the cylinder inner cavity in a sealing mode through the leather cups, annular leather cup grooves are formed in the inner end faces, close to the center of the cylinder, of the leather cups, central blind holes are formed in the centers of the inner end faces of the two pistons, springs are connected between the bottoms of the central blind holes of the two pistons, the springs are installed in the central blind holes of the two pistons, and the outer ends of the two pistons are directly connected through the protective covers and.
The air release hole is provided with an air release screw, the air release screw is provided with an air release screw cover, and air in the inner cavity of the cylinder body is released when brake fluid is added through the air release screw.
The guard shield be annular dome structure, the outer peripheral face of piston outer end and the inside portion fixed connection of guard shield, the outside portion joint of guard shield is to the inner groovy that the outer wall was seted up around the cylinder body through-hole for the piston outer end passes through guard shield and cylinder body outer port elastic connection.
The invention has the beneficial effects that:
the utility model relates to a piston in the middle of be the trompil, the spring assembly is downthehole, has two pistons in the cylinder body, and consequently the spring is fixed in the middle of the hole of two pistons, even on the inner wall of cylinder body can not fallen yet to the spring when the piston toward strutting outward, avoids the contact friction noise that produces of spring and cylinder body like this.
The utility model has the advantages of as follows: 1. the design is reasonable, and the structure is simple; 2. the noise suppression is good.
Drawings
Fig. 1 is an exploded view of the appearance of the wheel cylinder assembly according to the present invention.
Fig. 2 is an external view of the wheel cylinder assembly according to the present invention.
Fig. 3 is a sectional view of the installation of the present invention.
Fig. 4 is an explanatory diagram of the installation and cooperation of the piston, the spring and the cylinder body according to the present invention.
In the figure: 1. the device comprises a cylinder body, 2, a spring, 3, a leather cup, 4, a piston, 5, a shield, 6, a deflation screw, 7 and a deflation screw cover.
Detailed Description
The invention is further described with reference to the accompanying drawings and the description of the embodiments, the installation and the use thereof.
As shown in fig. 1 and 2, the utility model is mainly embodied by a cylinder body 1, a spring 2 and a piston component; the top of the cylinder body 1 is provided with an air release hole and an oil inlet hole, brake fluid is injected from the oil inlet hole, the original air in the inner cavity is discharged from the air release hole, an air release screw 6 is installed at the air release hole, an air release screw cover 7 is installed on the air release screw 6 for packaging, and air in the inner cavity of the cylinder body 1 is released when the brake fluid is added through the air release screw 6.
As shown in fig. 3 and 4, through holes are symmetrically formed at two ends of a cylinder body 1 to form an inner cavity, two piston assemblies are symmetrically arranged in the inner cavity, the two piston assemblies are connected through a spring 2, and each piston assembly comprises a leather cup 3, a piston 4 and a shield 5; two pistons 4 of two piston assemblies are all installed in the inner cavity of the cylinder body 1, the outer peripheral surfaces of the inner end parts of the two pistons 4 close to the center of the cylinder body 1 are provided with annular grooves, leather cups 3 are installed in the annular grooves, the pistons 4 are connected with the inner wall of the inner cavity of the cylinder body 1 in a sealing mode through the leather cups 3, the outer end surfaces of the leather cups 3 far away from the center of the cylinder body 1 are in close contact with the wall of the annular groove, annular leather cup grooves are formed in the inner end surfaces close to the center of the cylinder body 1 through the leather cups 3, central blind holes are formed in the centers of the inner end surfaces close to the center of the cylinder body 1 through the two pistons 4, springs 2 are connected between the bottoms of the central blind holes of the two pistons 4, the outer ends of the two pistons 4 are directly connected with the outer end openings of the.
Like this, be the trompil in the middle of the piston, the spring assembly is downthehole, has two pistons in the cylinder body, and consequently the spring is fixed in the middle of the hole of two pistons, even on the inner wall of cylinder body can not fallen yet to the spring when the piston outwards struts like this, avoids the contact friction of spring and cylinder body to produce the noise.
As shown in fig. 3, the protective cover 5 is in an annular dome structure, the outer peripheral surface of the outer end of the piston 4 is fixedly connected with the inner side of the protective cover 5, and the outer side of the protective cover 5 is clamped into an inner groove formed in the outer wall of the cylinder 1 around the through hole, so that the outer end of the piston 4 is elastically connected with the outer port of the cylinder 1 through the protective cover 5.
As shown in fig. 3 and 4, the cup 3 is first fixed in the annular groove of the piston 4, the spring 2 is installed in the middle hole of one piston 4, and then it is pressed into the cylinder 1 from one side of the cylinder 1, and the other piston 4 is pressed into the cylinder 1 from the other side of the cylinder 1, at this time, the spring 2 is fixed in the middle of the holes of the two pistons 4, so the spring 2 does not contact the inner surface of the cylinder. Then the protective cover is arranged on the outer side of the cylinder body and is matched with the piston and the cylinder body.
Finally, the deflating screw is screwed on, and the deflating screw cover 7 is installed on the deflating screw 6 again. The wheel cylinder can be installed on the stopper, and the stopper during operation, brake fluid gets into the wheel cylinder through the inlet port on the cylinder body and produces hydraulic pressure, promotes the piston and outwards struts, and piston 4 promotes external contact spare and realizes its function, and spring 2 is in two piston intermediate holes all the time at this in-process, consequently can not arouse the metal scraping noise with the inside contact of cylinder body.
Claims (3)
1. A novel drum brake wheel cylinder structure is characterized in that: mainly comprises a cylinder body (1), a spring (2) and a piston assembly; the top of the cylinder body (1) is provided with an air vent and an oil inlet, two ends of the cylinder body (1) are symmetrically provided with through holes to form an inner cavity, two piston assemblies are symmetrically arranged in the inner cavity and are connected through a spring (2), and each piston assembly comprises a leather cup (3), a piston (4) and a shield (5); two pistons (4) of two piston assembly all install in cylinder body (1) inner chamber, the annular groove is all seted up to the outer peripheral face of tip in two pistons (4), install leather cup (3) in the annular groove, sealing connection between piston (4) through leather cup (3) and cylinder body (1) inner chamber inner wall, annular leather cup groove is seted up at the inner terminal surface that is close to cylinder body (1) center in leather cup (3), central blind hole is seted up at the inner terminal surface center in two pistons (4), connect spring (2) between the central blind hole bottom of two pistons (4), install in the central blind hole of two pistons (4) spring (2), two pistons (4) outer ends are directly connected and form the elasticity rigid coupling through guard shield (5) and cylinder body (1) outer port.
2. The novel drum brake wheel cylinder structure according to claim 1, characterized in that:
bleeder hole department install bleeder screw (6), install bleeder screw cover (7) on bleeder screw (6), deflate the air of cylinder body (1) inner chamber when brake fluid adds through bleeder screw (6).
3. The novel drum brake wheel cylinder structure according to claim 1, characterized in that:
the protective cover (5) is of an annular dome structure, the outer peripheral surface of the outer end of the piston (4) is fixedly connected with the inner side portion of the protective cover (5), and the outer side portion of the protective cover (5) is clamped into an inner groove formed in the periphery of the through hole of the cylinder body (1), so that the outer end of the piston (4) is elastically connected with the outer port of the cylinder body (1) through the protective cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921470692.0U CN211175136U (en) | 2019-09-05 | 2019-09-05 | Novel drum brake wheel cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921470692.0U CN211175136U (en) | 2019-09-05 | 2019-09-05 | Novel drum brake wheel cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211175136U true CN211175136U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921470692.0U Active CN211175136U (en) | 2019-09-05 | 2019-09-05 | Novel drum brake wheel cylinder structure |
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| Country | Link |
|---|---|
| CN (1) | CN211175136U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446337A (en) * | 2021-07-13 | 2021-09-28 | 浙江亚太机电股份有限公司 | Plunger type wheel cylinder assembly |
-
2019
- 2019-09-05 CN CN201921470692.0U patent/CN211175136U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446337A (en) * | 2021-07-13 | 2021-09-28 | 浙江亚太机电股份有限公司 | Plunger type wheel cylinder assembly |
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