CN213354452U - Feedback disc valve body assembly of vacuum booster with sealing structure - Google Patents
Feedback disc valve body assembly of vacuum booster with sealing structure Download PDFInfo
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- CN213354452U CN213354452U CN202021258207.6U CN202021258207U CN213354452U CN 213354452 U CN213354452 U CN 213354452U CN 202021258207 U CN202021258207 U CN 202021258207U CN 213354452 U CN213354452 U CN 213354452U
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Abstract
The utility model relates to a vacuum booster's feedback disk valve body subassembly with seal structure belongs to car braking technical field's vacuum booster subassembly. The device comprises a bowl-shaped main cylinder push rod, a feedback disc is arranged in the main cylinder push rod in an interference fit mode, an annular boss is arranged on the outer edge of the feedback disc, a vent groove is formed in the outer surface of the diameter of the feedback disc, and an annular groove formed in the outer edge of a valve body is in sealing contact connection with the annular boss of the feedback disc. The advantage is novel structure, can promote the leakproofness of product, further establishes the basis for satisfying the high vacuum degree requirement of whole car, and the mould preparation is easy, does not increase the manufacturing process degree of difficulty, has promoted the assembly property of product.
Description
Technical Field
The utility model belongs to the technical field of car braking's vacuum booster subassembly, especially, indicate the feedback disk valve body subassembly that has seal structure's vacuum booster.
Background
The vacuum booster is a brake servo device in a light car brake system, a sedan car brake system and a mini car brake system, and is a key component in an automobile brake system. The working principle is that when a driver steps on a brake pedal, the thrust generated by different pressure differences of two working chambers in a vacuum booster is used for amplifying the force of the brake pedal according to a designed proportion to push a piston of a brake master cylinder by utilizing the vacuum generated when a gasoline engine works or the vacuum generated by a vacuum pump additionally arranged on a diesel engine, and the brake fluid in the brake master cylinder is compressed to generate hydraulic pressure and is transmitted to a wheel brake to enable a brake shoe to be in contact with a wheel hub so as to generate frictional resistance to control the deceleration or braking of a vehicle.
The vacuum booster is composed of a vacuum cavity A and an atmosphere cavity B as shown in fig. 5, and the vacuum source generated when the engine or the vacuum pump works in the non-braking state of the vacuum booster pumps air in the A, B cavity away through the vacuum tube to form a certain vacuum degree. When braking, the vacuum valve port is closed, the atmosphere valve port is opened, the cavity A keeps vacuum, and the cavity B enters atmosphere according to the opened atmosphere valve port. The vacuum of the cavity A and the atmosphere of the cavity B are separated and sealed by the following four parts: the diaphragm is combined with the front and the rear shells, the diaphragm is combined with the power-assisted disc and the valve body, the vacuum valve port, and the push rod of the main cylinder is sealed and separated from the matching parts of the feedback disc and the valve body.
In the existing automobile design, due to the improvement of the whole automobile configuration, the braking effect and the comfort of a driver, the size specification of a vacuum booster tends to be gradually increased, and the vacuum booster is transited from the conventional single diaphragm of 6, 7, 8 and 9 inches to 10, 11 and inches; the double membrane 7+8, 8+9 inches transitions to 10+10, 11+11 inches. The increase of the size specification of the vacuum booster can generate larger braking servo force and driving safety. Meanwhile, the boosting ratio is gradually increased from the original 5, 6, 7, 8 and the like to the current 9, 10, 11 and the like, so that the larger output hydraulic pressure is generated under the condition of smaller input force in the early braking period, and the pedal feeling and the running safety are improved. In conclusion, the diameter of the feedback disc 2 of the booster is required to be increased, but due to the limitation of the internal space of the booster, the structure matched with the feedback disc is changed from the conventional structure 1 to the structure 2, as shown in fig. 6.
According to the development demand of new energy automobiles, the vacuum source of the vacuum booster replaces an engine by the vacuum pump, the vacuum degree of actual use of the vacuum booster of various automobile types after the whole automobile is assembled is improved to more than 90kPa from the conventional 66.7kPa, the sealing performance of the vacuum booster is required to be further improved, otherwise, even if the tiny seal of the vacuum booster leaks, the load of the vacuum pump can be increased, and the service life of the vacuum pump is influenced.
Disclosure of Invention
The utility model discloses a vacuum booster's feedback dish valve body subassembly with seal structure to solve vacuum booster's the not good problem of leakproofness.
The utility model adopts the technical proposal that: the device comprises a bowl-shaped main cylinder push rod, a feedback disc is arranged in the main cylinder push rod in an interference fit mode, an annular boss is arranged on the outer edge of the feedback disc, a vent groove is formed in the outer surface of the diameter of the feedback disc, and an annular groove formed in the outer edge of a valve body is in sealing contact connection with the annular boss of the feedback disc.
The feedback disc is a rubber member.
The annular boss of the feedback disc is in a semicircular shape, the radius is r, and the depth H of the vent groove is less than or equal to the radius r.
The volume of the annular boss of the feedback disc is smaller than the space of the annular groove of the valve body.
The utility model has the advantages of novel structure can promote the leakproofness of product, further establishes the basis for satisfying the high vacuum requirement of whole car, and the mould preparation is easy, does not increase the production and manufacturing technology degree of difficulty, has promoted the assembly performance of product.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the feedback disk of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic structural view of the valve body of the present invention;
FIG. 5 is a cross-sectional view of a prior art vacuum booster assembly showing the engagement of a push rod of a master cylinder with a feedback disk and a valve body;
FIG. 6 is a cross-sectional view of another arrangement of a push rod of a master cylinder in a vacuum booster assembly of the prior art in cooperation with a feedback disk and a valve body; wherein:
the device comprises a main cylinder push rod 1, a feedback disc 2, a valve body 3, an annular boss 4, an annular groove 5, a vent groove 6, a valve rod 7, an air valve seat 8, a pressing block 9, a vacuum cavity A and an atmospheric cavity B.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the device comprises a main cylinder push rod 1 with a bowl-shaped bottom, a feedback disc 2 is arranged in the main cylinder push rod 1 in an interference manner, an annular boss 4 is arranged on the outer edge of the feedback disc 2, a vent groove 6 is arranged on the diameter outer surface of the feedback disc 2, and an annular groove 5 arranged on the outer edge of a valve body 3 is connected with the annular boss 4 of the feedback disc 2 in a sealing contact manner;
the feedback disc 2 is a rubber piece;
as shown in fig. 3, the annular boss 4 of the feedback disc 2 is semicircular, the radius is r, and the depth H of the vent groove is not more than the radius r;
the volume of the annular boss 4 of the feedback disc is smaller than the space of the annular groove 5 of the valve body.
The working principle is as follows:
the utility model discloses an improvement to main cylinder push rod 1 and feedback dish 2, 3 cooperation positions of valve body go on, vacuum booster is when the braking, transmits feedback dish 2 with pedal power through valve rod 7, air valve seat 8, briquetting 9, and the power rethread main cylinder push rod 1 that feedback dish 2 received transmits for the brake main cylinder. Feedback dish 2 is the rubber spare, certain hardness has, can produce the deformation after the atress, can influence the leakproofness of feedback dish 2 and 3 contact surfaces of valve body, consequently, increase the annular boss 4 and cooperate sealed structure with the annular groove 5 that the valve body outward flange increases at the outward flange of feedback dish, in addition, when feedback dish 2 and main cylinder push rod 1 assemble, there is certain magnitude of interference because of feedback dish 2 and main cylinder push rod hole, there is certain gaseous unable the getting rid of in the hole bottom, there is the mutual fitting surface insufficient contact problem of feedback dish 2 and main cylinder push rod 1, consequently, increase the 6 structures of unlimited quantity's vent groove at feedback dish diameter surface, in order to get rid of the air that the cylinder push rod hole exists, thereby guarantee sealed effect.
Claims (4)
1. The utility model provides a vacuum booster's feedback dish valve body subassembly with seal structure, includes that the bottom is the main cylinder push rod of bowl form, its characterized in that: a feedback disc is arranged in the main cylinder push rod in an interference fit mode, an annular boss is arranged on the outer edge of the feedback disc, a vent groove is formed in the outer surface of the diameter of the feedback disc, and an annular groove formed in the outer edge of a valve body is in sealing contact connection with the annular boss of the feedback disc.
2. A feedback disc valve body assembly of a vacuum booster having a sealing structure according to claim 1, wherein: the feedback disc is a rubber member.
3. A feedback disc valve body assembly of a vacuum booster having a sealing structure according to claim 1, wherein: the annular boss of the feedback disc is in a semicircular shape, the radius is r, and the depth H of the vent groove is less than or equal to the radius r.
4. A feedback disc valve body assembly of a vacuum booster having a sealing structure according to claim 1, wherein: the volume of the annular boss of the feedback disc is smaller than the space of the annular groove of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258207.6U CN213354452U (en) | 2020-07-01 | 2020-07-01 | Feedback disc valve body assembly of vacuum booster with sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258207.6U CN213354452U (en) | 2020-07-01 | 2020-07-01 | Feedback disc valve body assembly of vacuum booster with sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213354452U true CN213354452U (en) | 2021-06-04 |
Family
ID=76138759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021258207.6U Active CN213354452U (en) | 2020-07-01 | 2020-07-01 | Feedback disc valve body assembly of vacuum booster with sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213354452U (en) |
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2020
- 2020-07-01 CN CN202021258207.6U patent/CN213354452U/en active Active
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