CN205315562U - Single -piston wheel -brake cylinder - Google Patents
Single -piston wheel -brake cylinder Download PDFInfo
- Publication number
- CN205315562U CN205315562U CN201520994608.0U CN201520994608U CN205315562U CN 205315562 U CN205315562 U CN 205315562U CN 201520994608 U CN201520994608 U CN 201520994608U CN 205315562 U CN205315562 U CN 205315562U
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- piston
- cylinder body
- groove
- brake
- working chamber
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Abstract
The utility model discloses a single -piston wheel -brake cylinder, including the cylinder body, cylinder body one side is connected with outside braking bottom plate, the cylinder body opposite side is equipped with the working chamber, is equipped with the piston in the working chamber, the piston and the bottom of working chamber forms the hydraulic pressure chamber, and first recess has been seted up with cylinder body cooperation department to the piston, is equipped with the sealing washer in the first recess, and threaded hole is still seted up towards the opposite side in hydraulic pressure chamber to the piston, and there is the kicking block in screw hole department through threaded connection, has still seted up the inlet port on the cylinder body, and the inlet port communicates with each other with the hydraulic pressure chamber. Piston in this scheme and brake shoe be direct contact not, but through the kicking block of threaded connection on the piston and brake shoe contact, consequently when wearing and tearing appear in braking wheel cylinder work a period kicking block, kicking block that the kicking block that only needs to dismantle wearing and tearing down this moment is more renewed can, so the use cost who applies the brake the wheel cylinder is with greatly reduced.
Description
Technical field
This utility model relates to wheel cylinder, is specially a kind of single-piston wheel cylinder.
Background technology
Drum brake is the braking executive device in brakes, is the critical component in brake system of car, and the element of drum brake is fewer than disk brake, simple in construction, and manufacturing cost is relatively low.
Use the vehicle of drum brake when normally travelling, brake-shoe is at the self-adjusting mechanism of drum brake inside, under resetting-mechanism comprehensive function, brake-shoe rubbing surface keeps certain gap with brake drum all the time, during braking, piston in hydraulic drive wheel cylinder is displaced outwardly, wheelcylinder piston promotes brake-shoe parts near brake drum again, brake-shoe parts and brake drum produce frictional resistance and stop the rotation of wheel, after completing once braking, brake-shoe parts depart from brake drum return in brake under resetting-mechanism effect, wheel cylinder piston moves under the effect of brake-shoe in wheel cylinder, until brake-shoe is fixed on initial position under the support of self-adjusting mechanism. wheel cylinder, by the hydraulic energy of master cylinder is changed into mechanical energy, makes brake enter duty, and then realizes the braking of wheel, and currently used wheel cylinder mainly has single-piston formula and dual Piston two kinds.
Single-piston formula wheel cylinder is mainly used in double-collar and shoe type and two trailing shoe brake, but traditional single-piston formula wheel cylinder adopts wheelcylinder piston to push directly on the brake-shoe version near brake drum, owing to piston directly contacts with brake-shoe in this kind of version, therefore piston can produce certain abrasion in use for some time, now in order to ensure the normal operation of whole brake, piston being replaced, therefore this version will result in the rising of use cost.
Utility model content
This utility model is intended to provide a kind of piston long service life, the single-piston wheel cylinder that wheel cylinder use cost is low.
Single-piston wheel cylinder in this programme, including cylinder body, cylinder body side is connected with outer brake base plate, and cylinder body opposite side is provided with working chamber, piston it is provided with in working chamber, hydraulic cavities is formed on the bottom of piston and described working chamber, and piston offers the first groove with the cylinder body place of cooperation, is provided with sealing ring in the first groove, piston is further opened with screwed hole towards the opposite side of hydraulic cavities, screwed hole place has been threaded connection jacking block, and cylinder body is further opened with fuel feed hole, and fuel feed hole communicates with hydraulic cavities.
The principle of this programme is and effect is: when needs are braked, high-pressure brake liquid enters hydraulic cavities by the fuel feed hole on cylinder body, piston under the effect of high-pressure brake liquid by outer shifting, the jacking block connected with piston moves with piston is outer, move until offseting with outer brake hoof and then realizing braking action outside jacking block, it is arranged on the sealing ring between piston and cylinder body and can prevent the leakage of high-pressure brake liquid, piston in this programme and brake-shoe not in direct contact, but the jacking block being threadedly attached on piston contacts with brake-shoe, therefore when wheel cylinder works the appearance abrasion of a period of time jacking block, owing to jacking block is threadeded with piston employing, now have only to dismantle the jacking block that the jacking block of lower abrasion more renews, therefore the piston life in this programme will be greatly increased, the use cost of wheel cylinder will be substantially reduced.
Further, in order to make to keep between piston and hydraulic cavities suitable oil-feed gap, piston is provided with the projection keeping oil-feed gap towards hydraulic cavities side.
Further, in order to discharge the air in high-pressure brake liquid, cylinder body being further opened with air vent, air vent communicates with described hydraulic cavities, and air vent place is additionally provided with vent valve and vent valve protection screw.
Further, in order to prevent outside moisture and dust from entering, the normal operation of wheel cylinder is had influence on, being additionally provided with the second groove on piston, the second groove is provided with protective cover, and cylinder body offers draw-in groove, the side of protective cover is positioned in the second groove, and protective cover opposite side is positioned in draw-in groove.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment.
Fig. 2 is the A-A sectional view of Fig. 1 embodiment.
Detailed description of the invention
Below by detailed description of the invention, this utility model is described in further detail:
Accompanying drawing labelling in Figure of description includes: cylinder body 1, hydraulic cavities 2, piston 3, sealing ring 4, jacking block 5, protective cover 6, fuel feed hole 7, air vent 8, vent valve 9, vent valve protection screw 10.
Embodiment is substantially as shown in Figure 2: single-piston wheel cylinder, including cylinder body 1, the left side of cylinder body 1 offers screw, cylinder body 1 is connected with outer brake base plate by the screw in left side, right side opening at cylinder body 1 is provided with working chamber, working chamber is made up of two parts that radial dimension is different, and wherein the radial dimension of working chamber left part is more than the radial dimension of working chamber right part.
Piston 3 it is placed with in working chamber, hydraulic cavities 2 is formed on the left of piston 3 and between working chamber, the left side of piston 3 is provided with projection, this projection is the left narrow right wide version with tapering, when this projection left side and cylinder body 1 offset, piston 3 end face and cylinder body 1 end face remain to keep certain oil-feed gap, the first groove is offered at the place of cooperation of piston 3 with cylinder body 1, sealing ring 4 it is provided with in first groove, sealing ring 4 is for preventing the leakage of internal high pressure brake fluid, screwed hole is offered in the right side central position of piston 3, this screwed hole place has been threaded connection jacking block 5, jacking block 5 is divided into cylindrical section and conical section, the cylindrical section of jacking block 5 and piston 3 end face coordinate, the conical section of jacking block 5 offsets with outer brake hoof when braking, on piston 3, the position between screwed hole and the first groove is additionally provided with the second groove, the side of protective cover 6 is placed in the second groove, cylinder body 1 is provided with draw-in groove, the opposite side of protective cover 6 is placed in draw-in groove.
As shown in Figure 1, it is further opened with fuel feed hole 7 in the left side of cylinder body 1, fuel feed hole 7 communicates with hydraulic cavities 2, during braking, high-pressure brake liquid will enter hydraulic cavities 2 from fuel feed hole 7, be also arranged above air vent 8 at fuel feed hole 7, and air vent 8 communicates with hydraulic cavities 2, be additionally provided with vent valve 9 and vent valve protection screw 10 at air vent 8 place, vent valve 9 makes air can only discharge in hydraulic cavities 2 and can not enter into from hydraulic cavities 2.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this. Should be understood that; for a person skilled in the art, under the premise without departing from this utility model structure, it is also possible to make some deformation and improvement; these also should be considered as protection domain of the present utility model, and these are all without affecting effect and the practical applicability that this utility model is implemented. The protection domain that this application claims should be as the criterion with the content of its claim, and the detailed description of the invention in description etc. records the content that may be used for explaining claim.
Claims (4)
1. a single-piston wheel cylinder, it is characterized in that, including cylinder body, described cylinder body side is connected with outer brake base plate, described cylinder body opposite side is provided with working chamber, it is provided with piston in described working chamber, hydraulic cavities is formed on the bottom of described piston and described working chamber, described piston offers the first groove with the described cylinder body place of cooperation, it is provided with sealing ring in described first groove, described piston is further opened with screwed hole towards the opposite side of described hydraulic cavities, described screwed hole place has been threaded connection jacking block, described cylinder body is further opened with fuel feed hole, described fuel feed hole communicates with described hydraulic cavities.
2. single-piston wheel cylinder according to claim 1, it is characterised in that: described piston is provided with the projection keeping oil-feed gap towards described hydraulic cavities side.
3. single-piston wheel cylinder according to claim 2, it is characterised in that: being further opened with air vent on described cylinder body, described air vent communicates with described hydraulic cavities, and described air vent place is additionally provided with vent valve and vent valve protection screw.
4. single-piston wheel cylinder according to claim 3, it is characterized in that: described piston is additionally provided with the second groove, described second groove is provided with protective cover, described cylinder body offers draw-in groove, the side of described protective cover is positioned in described second groove, and described protective cover opposite side is positioned in described draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994608.0U CN205315562U (en) | 2015-12-05 | 2015-12-05 | Single -piston wheel -brake cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994608.0U CN205315562U (en) | 2015-12-05 | 2015-12-05 | Single -piston wheel -brake cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205315562U true CN205315562U (en) | 2016-06-15 |
Family
ID=56315717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520994608.0U Active CN205315562U (en) | 2015-12-05 | 2015-12-05 | Single -piston wheel -brake cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205315562U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351406A (en) * | 2015-12-05 | 2016-02-24 | 重庆元创汽车整线集成有限公司 | Single-piston brake cylinder |
-
2015
- 2015-12-05 CN CN201520994608.0U patent/CN205315562U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351406A (en) * | 2015-12-05 | 2016-02-24 | 重庆元创汽车整线集成有限公司 | Single-piston brake cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |