CN212744806U - Piston assembly for integrated parking mechanism - Google Patents
Piston assembly for integrated parking mechanism Download PDFInfo
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- CN212744806U CN212744806U CN202020847528.3U CN202020847528U CN212744806U CN 212744806 U CN212744806 U CN 212744806U CN 202020847528 U CN202020847528 U CN 202020847528U CN 212744806 U CN212744806 U CN 212744806U
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Abstract
The invention discloses a piston assembly for an integrated parking mechanism. The piston is sleeved in the piston hole, a three-stage step hole is formed in the middle of the piston and is divided into an outer side hole, a middle hole and an inner side hole, a step between the outer side hole and the middle hole in the three-stage step hole is a conical surface, one end of the screw rod is a block body end, the other end of the screw rod is a screw rod end, the block body end of the screw rod is installed in the outer side hole and matched with the step of the conical surface, an annular groove is formed in the middle hole in the three-stage step hole, a clamping ring is installed in the annular groove, a conical spring is connected between the clamping ring and the block body end of the screw rod, the conical spring is sleeved outside the screw rod end of the screw rod, and the block body. The utility model discloses can assist and make to have higher braking efficiency, have fine automation to the heart effect, effectively reduced because of the concentricity does not well cause screw rod swivel nut hairpin, service brake pedal stroke overlength not brake even, potential safety hazard risks such as parking inefficacy.
Description
Technical Field
The utility model relates to a piston assembly for automotive brake caliper, especially be used for integrateing the piston assembly of driving and parking function brake caliper.
Background
The integrated brake caliper is widely applied to the market at present, and the brake caliper needs to integrate the parking brake function on the premise of ensuring the service brake function. However, if the clearance between the piston and the friction plate is not adjusted along with the abrasion of the friction plate or is not adjusted in place during the use process, the clearance is too large, and the potential safety hazards of overlong travel of a service brake pedal, even no braking, parking failure and the like are caused.
At present, the contact surface of the traditional integrated brake caliper screw rod and the piston is a conical surface. The contact surfaces of the traditional screw and the piston are conical surfaces with the same angle, and grease is also coated on the contact surfaces to have adhesiveness during assembly, so that the screw and the piston are easy to adsorb each other, and therefore, a larger hydraulic pressure is needed to separate the piston from the conical surface of the screw, and the piston can be pushed out to generate braking force by being fed back to a brake caliper by the larger hydraulic pressure, so that the braking efficiency is lower; the traditional piston assembly has strict requirements on a screw rod, particularly a conical surface, and the probability of poor concentricity is high after the assembly is finished, so that the thread between the screw rod and a screw sleeve is blocked and cannot be self-adjusted easily, and the potential safety hazards of overlong travel of a service brake pedal, even no braking, parking failure and the like are caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the background art, the utility model provides a piston assembly for integrated form braking pincers for solve brake pedal stroke overlength that braking inefficiency, self-modulation mechanism do not self-modulate and cause, do not brake even, parking inefficacy scheduling problem.
The utility model adopts the technical proposal that:
the piston assembly comprises a screw rod, a conical spring and a clamping ring; the piston is sleeved in the piston hole, a three-stage step hole is formed in the middle of the piston and is divided into an outer side hole, a middle hole and an inner side hole, a step between the outer side hole and the middle hole in the three-stage step hole is a conical surface, one end of the screw rod is a block body end, the other end of the screw rod is a screw rod end, the block body end of the screw rod is installed in the outer side hole and matched with the step of the conical surface, an annular groove is formed in the middle hole in the three-stage step hole, a clamping ring is installed in the annular groove, a conical spring is connected between the clamping ring and the block body end of the screw rod, the conical spring is sleeved outside the screw rod end of the screw rod, and the.
The small end of the conical spring presses against the washer and the large end presses against the snap ring.
The conical spring is connected to the end face of the end of the screw rod block body through a gasket, and the gasket is connected with the end face of the end of the screw rod block body through a micro plane bearing.
An O-shaped ring is arranged between the end of the screw block and the wall of the outer hole of the piston.
The annular circumferential surface of the screw rod at the contact connection part with the conical surface of the piston is an outward convex annular arc surface.
The screw rod of the utility model is pressed against the conical surface of the piston under the elastic force of the conical spring; one end of the small diameter of the conical spring presses against the gasket, the gasket presses against the miniature plane bearing, and the miniature plane bearing presses against the screw; one end of the large diameter of the conical spring presses against the snap ring; the snap ring is clamped in the piston groove, so that the conical spring is in a compressed state to generate elastic force; the O-shaped ring is arranged between the piston and the screw rod.
The surface of the screw rod in contact with the piston is an arc surface and is in linear contact with the conical surface of the piston; even under the action of grease adhesion, the screw rod is easy to separate from the conical surface of the piston. And the arc screw has the function of automatically adjusting the centering when being stressed by the conical spring force, and compared with the traditional piston assembly provided with the conical screw, the mechanism has better concentricity.
The utility model has the advantages that:
as the surface of the screw rod in contact with the piston is an arc surface and is in linear contact with the conical surface of the piston, as shown in figure 2, gaps are arranged on two sides of a linear contact line, so that the screw rod and the piston are prevented from being mutually adsorbed, and the screw rod is easy to separate from the conical surface of the piston even under the action of grease adhesion. Therefore, the piston can be pushed to move only by small hydraulic pressure in the driving braking process, braking force is generated, and braking efficiency is improved.
And because the contact surface of the screw rod and the piston is arc-shaped, the piston assembly has the function of automatically adjusting the centering when being stressed by conical spring force, so that the piston assembly obtains better concentricity, the condition that the threads between the screw rod and the screw sleeve are clamped is effectively avoided, the screw rod can smoothly complete clearance self-adjustment in the using process, and the dragging and grinding of a friction plate and a brake disc are also avoided on the premise of ensuring the driving and parking braking effects.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a screw of the piston assembly of the present invention;
FIG. 3 is an enlarged view of the conical surface of the screw of the piston assembly of the present invention;
fig. 4 is the utility model discloses piston assembly's screw rod arc surface and the assembly sketch map of the piston conical surface.
In the figure: 1. the device comprises a piston, 2, an O-shaped ring, 3, a screw rod, 4, a miniature plane bearing, 5, a gasket, 6, a conical spring, 7, a clamping ring, 11, a conical surface, 31 and an outward convex annular arc surface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the piston assembly includes a screw 3, a conical spring 6, and a snap ring 7; the piston 1 is sleeved in a piston hole and the end part of the piston 1 is connected to a brake block of the integrated parking mechanism, a third-level stepped hole is formed in the middle of the piston 1 and is divided into an outer hole, a middle hole and an inner hole, the hole close to a brake disc of the integrated parking mechanism is the outer hole, the hole diameters of the outer hole, the middle hole and the inner hole are sequentially increased, the step between the outer hole and the middle hole in the third-level stepped hole is a conical surface 11, as shown in figure 2, one end of a screw rod 3 is a block body end, the other end of the screw rod is a screw rod end, the block body end is coaxially connected with the screw rod end, the block body end of the screw rod 3 is installed in the outer hole and matched with the step of the conical surface 11, an O-shaped ring 2 is arranged between the block body end of the screw.
An annular groove is formed in a middle hole in the third-stage stepped hole, a snap ring 7 is installed in the annular groove, and the snap ring 7 is clamped in the groove of the piston 1, so that the conical spring 6 is in a compressed state to generate elasticity. A conical spring 6 is connected between the clamp ring 7 and the block end of the screw rod 3, the small end of the conical spring 6 presses against the gasket 5, the large end of the conical spring presses against the clamp ring 7, the conical spring 6 is sleeved outside the screw rod end of the screw rod 3, and the block end of the screw rod 3 presses against the conical surface 11 of the piston 1 under the action force of the conical spring 6. The conical spring 6 is connected to the end face of the screw rod 3 body end through a gasket 5, and the gasket 5 and the end face of the screw rod 3 body end are connected through a micro plane bearing 4.
As shown in FIG. 3, the annular circumference of the screw rod 3 at the contact connection part with the conical surface 11 of the piston 1 is a convex annular arc surface. As shown in figure 4, the screw 3 is pressed against the conical surface 11 of the piston 1 under the action of the elastic force of the conical spring 6, and the contact surface of the screw 3 and the conical surface 11 of the piston 1 is an outward-convex annular arc surface 31, so that the screw has good concentricity after automatic centering during assembly, the existing structure of linear contact of the conical surface of the piston is changed, and the technical problem that the screw is easy to separate from the conical surface of the piston even under the action of grease adhesion is solved.
When service braking is carried out, the piston assembly moves forwards under the action of hydraulic pressure, namely, towards the direction of a brake disc, and a gap between the screw rod 3 and the screw sleeve is eliminated, and the screw sleeve is fixed, so that the screw rod 3 stops moving under the tension of the screw sleeve, and the piston 1 continues to move forwards under the action of hydraulic pressure; the contact surface of the screw rod 3 and the piston 1 is a convex annular arc surface 31, so the screw rod can be easily separated; at the moment, the conical spring 6 is continuously compressed to generate larger elastic force, when the elastic force is increased to a proper value, the screw rod 3 and the thread of the screw sleeve generate self-regulation, and the screw rod 3 rotates and moves forwards through the miniature plane bearing 4 until the screw rod is contacted with the conical surface 11 of the piston 1 again because the screw sleeve is fixed; at this time, the automatic clearance adjustment of the service brake is completed.
Therefore, the piston can be pushed out under smaller hydraulic pressure, and the brake device has higher brake efficiency; and the contact surface of the screw and the piston is an arc surface, so that the brake caliper has good automatic centering effect, the internal mechanism of the assembled brake caliper has good concentricity, and the potential safety hazard risks of screw thread sleeve card distribution, overlong travel of a service brake pedal, even no braking, parking failure and the like caused by poor concentricity are effectively reduced.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the right of the present invention cannot be defined thereby, therefore, the embodiments obtained without the inventive premise according to the present invention all belong to the protection scope of the present invention.
Claims (5)
1. A piston assembly for an integrated parking mechanism, characterized in that: the piston assembly comprises a screw rod (3), a conical spring (6) and a snap ring (7); piston (1) suit is in the piston hole, open in the middle of piston (1) has tertiary step hole, tertiary step hole divide into the outside hole, well hole and inboard hole, the step between the outside hole in the tertiary step hole and the well hole is conical surface (11), screw rod (3) one end is the block end, the other end is the screw rod end, the block end dress of screw rod (3) is in the outside hole and with the step cooperation of conical surface (11), open annular groove in the well hole in the tertiary step hole, install snap ring circle (7) in the annular groove, be connected with conical spring (6) between the block end of snap ring (7) and screw rod (3), conical spring (6) suit is outside the screw rod end of screw rod (3), block end pressure is leaned on conical surface (11) of piston (1) under the effort of conical spring (6) screw rod (3).
2. A piston assembly for an integrated park mechanism according to claim 1, wherein: the small end of the conical spring (6) presses the back cushion ring (5), and the large end presses the clamping ring (7).
3. A piston assembly for an integrated park mechanism according to claim 1, wherein: the conical spring (6) is connected to the end face of the screw rod (3) block body end through a gasket (5), and the gasket (5) is connected with the end face of the screw rod (3) block body end through a micro plane bearing (4).
4. A piston assembly for an integrated park mechanism according to claim 1, wherein: an O-shaped ring (2) is arranged between the end of the screw rod (3) block and the wall of the outer hole of the piston (1).
5. A piston assembly for an integrated park mechanism according to claim 1, wherein: the annular circumferential surface of the screw rod (3) at the contact connection part with the conical surface (11) of the piston (1) is an outward convex annular arc surface (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020847528.3U CN212744806U (en) | 2020-05-20 | 2020-05-20 | Piston assembly for integrated parking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020847528.3U CN212744806U (en) | 2020-05-20 | 2020-05-20 | Piston assembly for integrated parking mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN212744806U true CN212744806U (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020847528.3U Active CN212744806U (en) | 2020-05-20 | 2020-05-20 | Piston assembly for integrated parking mechanism |
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| CN (1) | CN212744806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738407A (en) * | 2022-05-17 | 2022-07-12 | 汇工(河北)机械集团有限公司 | Disc brake adjusting device |
-
2020
- 2020-05-20 CN CN202020847528.3U patent/CN212744806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738407A (en) * | 2022-05-17 | 2022-07-12 | 汇工(河北)机械集团有限公司 | Disc brake adjusting device |
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