CN107524737B - Hydraulic parking brake and braking clearance compensation mechanism thereof - Google Patents
Hydraulic parking brake and braking clearance compensation mechanism thereof Download PDFInfo
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- CN107524737B CN107524737B CN201710751691.2A CN201710751691A CN107524737B CN 107524737 B CN107524737 B CN 107524737B CN 201710751691 A CN201710751691 A CN 201710751691A CN 107524737 B CN107524737 B CN 107524737B
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- shell
- screw rod
- adjusting mandrel
- bearing seat
- piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
- F16D65/74—Slack adjusters hydraulic self-acting in one direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/42—Slack adjusters mechanical non-automatic
- F16D65/46—Slack adjusters mechanical non-automatic with screw-thread and nut
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a braking clearance compensation mechanism, which comprises a shell, wherein the center of the shell is provided with a screw rod in sliding fit with the screw rod, an adjusting mandrel in threaded fit with the screw rod is sleeved on the screw rod, a multi-head external thread is arranged on the peripheral wall of the upper part of the adjusting mandrel, a bearing assembly in threaded fit with the adjusting mandrel is sleeved on the upper part of the adjusting mandrel, a bearing seat in rotary fit with the bearing assembly is arranged on a shell of the bearing assembly, and the bearing seat is in single-degree-of-freedom sliding fit with the shell; a disc spring sleeved outside the bearing seat and combining a limiting anti-rotation structure between the bearing seat and the adjusting mandrel is arranged in the shell; a piston which is positioned below the adjusting mandrel and is used for applying upward axial force to the adjusting mandrel in an axial direction is arranged in the shell; the piston is provided with an outer limit surface and an inner limit surface which are respectively matched with the bearing seat and the adjusting mandrel, and a gap is reserved between the inner limit surface and the adjusting mandrel when the outer limit surface is in limit fit with the bearing seat. The invention also discloses a hydraulic parking brake.
Description
Technical Field
The invention relates to a parking brake, in particular to a hydraulic parking brake and a braking clearance compensation mechanism thereof.
Background
With the increasing aggravation of traffic jam, energy crisis, environmental pollution and other problems, the preferential development of public transportation becomes a core strategy for the development of various urban transportation worldwide. In this context, modern rail trains that are aesthetically pleasing, environmentally friendly, advanced in performance, comfortable to ride and low in operating costs will be promising.
According to design requirements, the rails of rail transit are not always kept horizontal, but have a certain slope, and in order to apply parking under the conditions of maximum gradient and maximum load of a line, the current vehicles generally adopt a manual brake device when realizing vehicle parking. The principle of the manual brake device is as follows: the brake shoe is pulled by a lever mechanism using a hand pulling device to transfer braking force to the wheel, while the wheel stopper is used. However, as the brake shoe wears, the brake gap becomes progressively larger and the braking force decreases. Another vehicle parking mode is: according to the wind pressure change of the train, windy relief windless braking is realized, but the braking mode needs a large number of unit braking units, and the control of air pressure is difficult, so that faults such as leakage and the like are easy to occur.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a hydraulic parking brake and a brake clearance compensation mechanism thereof, which can adjust the clearance of the parking brake.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention firstly provides a braking clearance compensation mechanism, which comprises a shell, wherein the center of the shell is provided with a screw rod which is in sliding fit with the shell, an adjusting mandrel which is in threaded fit with the screw rod is sleeved on the screw rod, a multi-head external thread is arranged on the peripheral wall of the upper part of the adjusting mandrel, a bearing assembly which is in threaded fit with the adjusting mandrel is sleeved on the upper part of the adjusting mandrel, a bearing seat which is in rotary fit with the bearing assembly is sleeved outside the bearing assembly, and the bearing seat is in single-degree-of-freedom sliding fit in the shell; a limiting anti-rotation structure is arranged between the lower part of the adjusting mandrel and the lower part of the bearing seat, a disc spring which is sleeved outside the bearing seat and enables the limiting anti-rotation structure between the bearing seat and the adjusting mandrel to be combined is arranged in the shell, and the disc spring applies downward axial force to the adjusting mandrel in an axial direction through the limiting anti-rotation structure; a piston which is positioned below the adjusting mandrel and used for applying upward axial force to the adjusting mandrel in an axial direction is arranged in the shell, and an end face rolling bearing is arranged between the adjusting mandrel and the piston; an outer limiting surface and an inner limiting surface which are respectively matched with the bearing seat and the adjusting mandrel are arranged on the piston, and a gap is reserved between the inner limiting surface and the adjusting mandrel when the outer limiting surface is in limiting fit with the bearing seat;
the shell is also fixedly provided with a ferrule positioned above the bearing assembly, and a rotation preventing structure for preventing the bearing assembly from rotating when the ferrule is in contact fit with the bearing assembly is arranged between the ferrule and the bearing assembly;
the lower end of the screw rod extends out of the shell, the external thread arranged on the adjusting mandrel and the external thread arranged on the screw rod have the same screwing direction, and the screw pitch of the external thread arranged on the adjusting mandrel is larger than that of the external thread arranged on the screw rod.
Further, an outer conical surface with the outer diameter gradually increasing along the direction from top to bottom is arranged at the lower part of the adjusting mandrel, and an inner conical surface matched with the outer conical surface is arranged at the lower part of the bearing seat; the rotation preventing structure is a conical surface matching structure arranged between the bearing assembly and the ferrule.
Further, a ball spring lock pin is arranged between the bearing assembly and the bearing seat.
Further, the piston is sleeved with an outer piston which can be used for applying upward axial force to the piston.
Further, the casing includes the upper casing, fixed mounting be in the lower casing of upper casing lower extreme and suit are in the sealed lid outside the screw rod, the dish spring is installed in the upper casing, piston and outer piston are installed in the lower casing, just be equipped with respectively on the lower casing with the piston with outer piston one-to-one is equipped with the hydraulic pressure interface that is used for connecting hydraulic means.
Further, a blind hole is formed in the end face of the upper end of the screw, a manual adjusting rod is arranged in the blind hole and is in sliding fit with the blind hole, and the manual adjusting rod and the screw synchronously rotate.
Further, the outer circumferential wall of the manual adjusting rod is uniformly provided with inner semi-cylindrical grooves in an annular mode, outer semi-cylindrical grooves are arranged on the inner wall of the blind hole in one-to-one correspondence with the inner semi-cylindrical grooves, and rolling pins are inserted into cylindrical grooves formed by the inner semi-cylindrical grooves and the outer semi-cylindrical grooves.
The invention also provides a hydraulic parking brake, which comprises a bracket assembly and a clamp body, wherein a pin is arranged on the bracket assembly, the clamp body is sheathed on the pin in a sliding fit manner, a rotating shaft is arranged on the clamp body, a pressure arm is sheathed on the rotating shaft in a rotating fit manner, two ends of the pressure arm are respectively positioned at two sides of the rotating shaft, and a braking mechanism is arranged between one end of the pressure arm and the clamp body; the brake clearance compensation mechanism as claimed in any one of claims 1 to 7 is fixedly arranged on the caliper body, and the other end of the pressure arm is in contact fit with the lower end of the screw rod.
Further, a pushing disc is arranged between the lower end of the screw rod and the pressure arm, and a wear-resistant lubricating piece is arranged between the pushing disc and the screw rod; the pressure arm is fixedly provided with a contact piece which is used for being in contact with the pushing disc and is matched with the pushing disc, and the top surface of the contact piece, which faces the pushing disc, is a spherical surface.
Further, the braking mechanism comprises a sliding pin, a first braking block installed on the caliper body and a second braking block in contact fit with the pressure arm are sleeved at two ends of the sliding pin respectively in sliding fit with the sliding pin, a spring positioned between the first braking block and the second braking block is sleeved on the sliding pin, and a braking disc is arranged between the first braking block and the second braking block; and the pressure arm is provided with a spherical contact surface which is in contact fit with the second brake block and protrudes upwards.
The invention has the beneficial effects that:
the hydraulic parking brake of the invention is provided with the brake clearance compensation mechanism which is in contact fit with the pressure arm on the caliper body, and the adjustment of the clearance of the parking brake can be realized by utilizing the brake clearance adjustment mechanism, and the principle is as follows:
when the gap is normal, the parking brake is realized, under the action of the disc spring, the limiting anti-rotation structure between the bearing seat and the adjusting mandrel is combined and applies downward axial force to the adjusting mandrel, under the action of the limiting anti-rotation structure, the adjusting mandrel cannot rotate, and the downward axial force drives the adjusting mandrel and the screw rod to move downwards together and drives the pressure arm to rotate, so that the parking brake is realized;
when the brake is released, under normal conditions, the piston applies upward axial force to the adjusting mandrel under the action of hydraulic pressure to drive the adjusting mandrel, the screw rod and the bearing seat to move upwards;
when the braking clearance is too large, however, the piston pushes the bearing seat, the screw rod, the adjusting mandrel and the bearing assembly to move together for a certain distance during braking release, and the rear ferrule is contacted with the bearing assembly to enable the rotation preventing structure to be combined, so that the bearing assembly cannot move and rotate; the bearing seat is in limit fit with the outer limit surface of the piston during parking braking, the piston drives the bearing seat to move upwards to cause the separation failure of the limit anti-rotation structure, the inner limit surface drives the adjusting mandrel to move upwards under the action of the end face rolling bearing, the adjusting mandrel rotates under the action of the thread fit structure between the adjusting mandrel and the bearing assembly and the screw rod, the bearing assembly is motionless, the rotating adjusting mandrel drives the screw rod to move downwards, and the screw rod moves downwards for a certain distance relative to the adjusting mandrel due to the fact that the screw pitch of the external thread arranged on the adjusting mandrel is larger than that of the external thread arranged on the screw rod, so that gap compensation is realized.
The hydraulic parking brake of the invention also has the following advantages:
1. by arranging the outer piston, the release of the parking brake can be realized by using the outer piston after the failure of the piston hydraulic system, and the normal operation of the brake is ensured, so that the reliability is higher;
2. if the hydraulic systems are out of order, the manual adjusting rod can be used for driving the screw rod to move so as to release the parking brake;
3. through setting up contact and pushing away the contact cooperation of dish on the arm of pressure to set up the top surface of contact as the sphere, set up spherical contact surface and second brake block contact cooperation simultaneously on the arm of pressure, utilize the point contact principle between sphere and the plane, can ensure that braking motion is steady, no abnormal sound.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic illustration of a hydraulic parking brake embodiment of the present invention;
fig. 2 is a schematic diagram of the assembly relationship between the pressure arm and the shaft and the clamp body.
Reference numerals illustrate:
1-a disc spring; 2-bearing assembly; 3-manual adjustment of the lever; 4-adjusting the mandrel; 5-a piston; 6-an outer piston; 7-a screw; 8-a clamp body; 9-a first brake pad; 9' -a second brake pad; 10-sliding pins; 11-a pressure arm; 12-rotating shaft; 13-a bracket assembly; 14-a compensation mechanism; 15-bearing seats; 16-a ferrule; 17-end face bearings; 18-pushing a disc; 19-contacts; 20-springs; 21-spherical contact surface; 22-an upper housing; 23-a lower housing; 24-sealing cover; 25-end face bearing.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
As shown in fig. 1, a schematic structural view of an embodiment of the hydraulic parking brake of the present invention is shown. The hydraulic parking brake of the embodiment comprises a bracket assembly 13 and a clamp body 8, wherein a pin is arranged on the bracket assembly 13, the clamp body 8 is sleeved on the pin in a sliding fit manner, a rotating shaft 12 is arranged on the clamp body, a pressure arm 11 is sleeved on the rotating shaft 12 in a rotating fit manner, two ends of the pressure arm 11 are respectively positioned on two sides of the rotating shaft 12, and a braking mechanism is arranged between one end of the pressure arm 11 and the clamp body 8. The caliper body 8 is fixedly provided with a brake clearance compensation mechanism 14.
The braking clearance compensation mechanism of the embodiment comprises a shell, a screw rod 7 in sliding fit with the shell is arranged in the center of the shell, an adjusting mandrel 4 in threaded fit with the screw rod 7 is sleeved on the screw rod 7, external threads are arranged on the peripheral wall of the upper portion of the adjusting mandrel 4, a bearing assembly 2 in threaded fit with the adjusting mandrel 4 is sleeved on the upper portion of the adjusting mandrel 4, a bearing seat 15 in rotating fit with the bearing assembly 2 is sleeved outside the bearing assembly 2, the bearing seat 15 is installed in the shell in a single-degree-of-freedom sliding fit mode, and a light ball spring lock pin is arranged between the bearing assembly 2 and the bearing seat 15. Specifically, the external thread provided on the outer peripheral wall of the upper portion of the adjusting mandrel 4 in this embodiment is a trapezoid multi-head external thread, and similarly, a trapezoid multi-head internal thread matched with the trapezoid multi-head external thread is provided on the bearing assembly 2.
A limiting rotation preventing structure is arranged between the lower part of the adjusting mandrel 4 and the lower part of the bearing seat 15, a disc spring 1 sleeved outside the bearing seat 15 and combined with the limiting rotation preventing structure between the bearing seat 15 and the adjusting mandrel 4 is arranged in the shell, and the disc spring 1 applies downward axial force downwards axially to the adjusting mandrel 4 through the limiting rotation preventing structure. Specifically, the lower part of the adjusting mandrel 4 of this embodiment is provided with an outer conical surface with the outer diameter gradually increasing along the direction from top to bottom, the lower part of the bearing seat 15 is provided with an inner conical surface matched with the outer conical surface, and through the conical surface matching structure between the adjusting mandrel 4 and the bearing seat 15, the limit matching between the adjusting mandrel 4 and the bearing seat 15 can be realized, and meanwhile, when the inner conical surface and the outer conical surface are bonded, the adjusting mandrel 4 can be effectively prevented from rotating relative to the bearing seat 15, so that the technical purpose of preventing rotation is realized.
The casing of this embodiment is provided with a piston 5 located below the adjustment mandrel 4 and used for applying an upward axial force to the adjustment mandrel 4, an end face rolling bearing is arranged between the adjustment mandrel 4 and the piston 5, the end face rolling bearing of this embodiment adopts a thrust needle bearing, and a thrust washer is arranged between the thrust needle bearing and the adjustment mandrel 4. The piston 5 is provided with an outer limit surface and an inner limit surface which are respectively matched with the bearing seat 15 and the adjusting mandrel 4, and a gap is reserved between the inner limit surface and the adjusting mandrel 4 when the outer limit surface is in limit fit with the bearing seat 15.
The screw rod 7 of the embodiment is also fixedly provided with a ferrule 16 which moves synchronously with the screw rod and is positioned above the bearing assembly 2, and a rotation preventing structure for preventing the bearing assembly 2 from rotating when the ferrule 16 is in contact fit with the bearing assembly 2 is arranged between the ferrule 16 and the bearing assembly 2. The rotation preventing structure of the present embodiment is a tapered surface fitting structure provided between the bearing assembly 2 and the collar 16, and when the tapered surface fitting structure between the bearing assembly 2 and the collar 16 is combined, the bearing assembly 2 is effectively prevented from rotating relative to the collar 16. The collar 16 of the present embodiment is made of a soft metal material (such as copper, silver, etc.), so that the bearing assembly 2 is effectively prevented from being bumped or excessively worn.
The lower end of the screw 7 of this embodiment extends beyond the housing, and the other end of the pressure arm 11 is in contact engagement with the lower end of the screw 7. The external thread arranged on the adjusting mandrel 4 and the external thread arranged on the screw rod 7 have the same rotation direction, and the pitch of the external thread arranged on the adjusting mandrel 4 is larger than that of the external thread arranged on the screw rod 7.
Further, the piston 5 of this embodiment is further sleeved with an outer piston 6 for applying an axially upward axial force thereto, and when the hydraulic system of the piston 5 fails, the axially upward axial force of the outer piston 6, i.e., the outer piston 6, can be utilized to play a standby role, so as to improve reliability. The upper end face of the screw rod 7 of the embodiment is provided with a blind hole, a manual adjusting rod 3 is arranged in the blind hole, the manual adjusting rod 3 is in sliding fit with the blind hole, and the manual adjusting rod 3 and the screw rod 7 synchronously rotate. Specifically, the outer circumference wall of the manual adjusting rod 3 is uniformly provided with inner semi-cylindrical grooves in an annular mode, outer semi-cylindrical grooves are arranged on the inner wall of the blind hole in a one-to-one correspondence mode with the inner semi-cylindrical grooves, and rolling pins are inserted into the cylindrical grooves formed by the inner semi-cylindrical grooves and the outer semi-cylindrical grooves, so that the technical purposes that the manual adjusting rod 3 axially moves relative to the screw rod 7 and the manual adjusting rod 3 and the screw rod 7 synchronously rotate can be achieved.
Further, the housing of the present embodiment includes an upper housing 22, a lower housing 23 fixedly installed at the lower end of the upper housing 22, and a sealing cover 24 sleeved outside the screw, and the upper housing 22, the lower housing 23, and the sealing cover 24 together constitute a closed housing structure. The disc spring 1 is arranged in the upper shell, the piston 5 and the outer piston 6 are arranged in the lower shell, and hydraulic interfaces for connecting the hydraulic devices are respectively arranged on the lower shell in one-to-one correspondence with the piston 5 and the outer piston 6.
Further, a push disc 18 is arranged between the lower end of the screw 7 and the pressure arm 11, and a wear-resistant lubricating piece is arranged between the push disc 18 and the screw 7; the pressure arm 11 is fixedly provided with a contact piece 19 for contacting the matching section of the push disc 18, and the top surface of the contact piece 19 facing the push disc is a spherical surface. The braking mechanism of the embodiment comprises a sliding pin 10, wherein a first braking block 9 installed on a caliper body 8 and a second braking block 9' in contact fit with a pressure arm 11 are respectively sleeved at two ends of the sliding pin 10 in sliding fit, a spring 20 positioned between the first braking block 9 and the second braking block 9' is sleeved on the sliding pin 10, and a braking disc is arranged between the first braking block 9 and the second braking block 9 '. The pressure arm 11 is provided with two spherical contact surfaces 21 which are in contact fit with the second brake block 9 'and are convex upwards, and the two spherical contact surfaces 21 are respectively positioned at two ends of the second brake block 9'.
Specifically, end face bearings 25 are arranged between the two ends of the pressure arm 11 and the clamp body 8, and the end face bearings 25 are sleeved on the rotating shaft 12, so that the rotation of the pressure arm 11 relative to the rotating shaft 12 is smoother.
According to the hydraulic parking brake, the brake clearance compensation mechanism in contact fit with the pressure arm is arranged on the caliper body, and the adjustment of the parking brake clearance can be realized by utilizing the brake clearance adjustment mechanism, and the principle is as follows:
when parking is braked, under the action of the disc spring, the limiting anti-rotation structure between the bearing seat and the adjusting mandrel is combined and applies downward axial force to the adjusting mandrel, and under the action of the limiting anti-rotation structure, the adjusting mandrel cannot rotate, and the downward axial force drives the adjusting mandrel, the bearing assembly and the screw rod to move downwards together and drive the pressure arm to rotate, so that parking braking is realized;
when the brake is released, under normal conditions, the piston applies upward axial force to the adjusting mandrel under the action of hydraulic pressure to drive the adjusting mandrel, the screw rod and the bearing seat to move upwards;
however, under the condition of overlarge braking clearance, the ferrule is contacted with the bearing assembly so that the rotation preventing structure is combined, and the bearing assembly cannot rotate; the bearing seat is in limit fit with the outer limit surface of the piston during parking braking, the piston drives the bearing seat, the adjusting mandrel, the screw rod and the bearing assembly to move upwards for a certain distance, the bearing assembly is matched with the ferrule and cannot move and rotate, so that the separation failure of the limit anti-rotation structure of the bearing seat and the adjusting mandrel is caused, the inner limit surface and the end surface rolling bearing drive the adjusting mandrel to move upwards, the adjusting mandrel rotates under the action of the thread fit structure between the adjusting mandrel and the bearing assembly and between the adjusting mandrel and the screw rod, the screw rod moves downwards, and the screw rod moves downwards for a certain distance relative to the adjusting mandrel due to the fact that the thread pitch of the external thread arranged on the adjusting mandrel is larger than that of the external thread arranged on the screw rod.
The hydraulic parking brake of the present embodiment also has the following advantages:
1. by arranging the outer piston, the release of the parking brake can be realized by using the outer piston after the failure of the piston hydraulic system, and the normal operation of the brake is ensured, so that the reliability is higher;
2. if the hydraulic systems are out of order, the manual adjusting rod can be used for driving the screw rod to move so as to release the parking brake;
3. through setting up contact and pushing away the contact cooperation of dish on the arm of pressure to set up the top surface of contact as the sphere, set up spherical contact surface and second brake block contact cooperation simultaneously on the arm of pressure, utilize the point contact principle between sphere and the plane, can ensure that braking motion is steady, no abnormal sound.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. A brake lash compensation mechanism, characterized by: the device comprises a shell, wherein a screw rod in sliding fit with the shell is arranged in the center of the shell, an adjusting mandrel in threaded fit with the screw rod is sleeved on the screw rod, an external thread is arranged on the peripheral wall of the upper part of the adjusting mandrel, a bearing assembly in threaded fit with the adjusting mandrel is sleeved on the upper part of the adjusting mandrel, a bearing seat in rotary fit with the bearing assembly is sleeved on the bearing assembly, and the bearing seat is in single-degree-of-freedom sliding fit in the shell; a limiting anti-rotation structure is arranged between the lower part of the adjusting mandrel and the lower part of the bearing seat, a disc spring which is sleeved outside the bearing seat and enables the limiting anti-rotation structure between the bearing seat and the adjusting mandrel to be combined is arranged in the shell, and the disc spring applies downward axial force to the adjusting mandrel in an axial direction through the limiting anti-rotation structure; a piston which is positioned below the adjusting mandrel and used for applying upward axial force to the adjusting mandrel in an axial direction is arranged in the shell, and an end face rolling bearing is arranged between the adjusting mandrel and the piston; an outer limiting surface and an inner limiting surface which are respectively matched with the bearing seat and the adjusting mandrel are arranged on the piston, and a gap is reserved between the inner limiting surface and the adjusting mandrel when the outer limiting surface is in limiting fit with the bearing seat;
the shell is also fixedly provided with a ferrule positioned above the bearing assembly, and a rotation preventing structure for preventing the bearing assembly from rotating when the ferrule is in contact fit with the bearing assembly is arranged between the ferrule and the bearing assembly;
the lower end of the screw rod extends out of the shell, the external thread arranged on the adjusting mandrel and the external thread arranged on the screw rod have the same screwing direction, and the screw pitch of the external thread arranged on the adjusting mandrel is larger than that of the external thread arranged on the screw rod;
the lower part of the adjusting mandrel is provided with an outer conical surface with the outer diameter gradually increasing along the direction from top to bottom, and the lower part of the bearing seat is provided with an inner conical surface matched with the outer conical surface; the rotation preventing structure is a conical surface matching structure arranged between the bearing assembly and the ferrule;
the piston is also sleeved with an outer piston which can be used for applying upward axial force to the piston;
the shell comprises an upper shell, a lower shell fixedly installed at the lower end of the upper shell and a sealing cover sleeved outside the screw rod, the disc spring is installed in the upper shell, the piston and the outer piston are installed in the lower shell, and hydraulic interfaces for connecting a hydraulic device are arranged on the lower shell in one-to-one correspondence with the piston and the outer piston respectively.
2. The brake lash compensation mechanism of claim 1 wherein: and a ball spring lock pin is arranged between the bearing assembly and the bearing seat.
3. The brake play compensation mechanism according to claim 1 or 2, characterized in that: the screw rod is characterized in that a blind hole is formed in the end face of the upper end of the screw rod, a manual adjusting rod is arranged in the blind hole and is in sliding fit with the blind hole, and the manual adjusting rod and the screw rod synchronously rotate.
4. A brake slack compensation mechanism according to claim 3, wherein: the manual adjusting rod is characterized in that inner semi-cylindrical grooves are uniformly distributed on the outer peripheral wall of the manual adjusting rod in an annular mode, outer semi-cylindrical grooves are formed in the inner wall of the blind hole in one-to-one correspondence with the inner semi-cylindrical grooves, and rolling pins are inserted into cylindrical grooves formed by the inner semi-cylindrical grooves and the outer semi-cylindrical grooves.
5. A hydraulic parking brake, characterized by: the clamp comprises a support assembly and a clamp body, wherein a pin is arranged on the support assembly, the clamp body is sheathed on the pin in a sliding fit manner, a rotating shaft is arranged on the clamp body, a pressure arm is sheathed on the rotating shaft in a rotating fit manner, two ends of the pressure arm are respectively positioned at two sides of the rotating shaft, and a braking mechanism is arranged between one end of the pressure arm and the clamp body; the brake clearance compensation mechanism as claimed in any one of claims 1 to 4 is fixedly arranged on the caliper body, and the other end of the pressure arm is in contact fit with the lower end of the screw rod.
6. The hydraulic parking brake of claim 5 wherein: a pushing disc is arranged between the lower end of the screw rod and the pressure arm, and a wear-resistant lubricating piece is arranged between the pushing disc and the screw rod; the pressure arm is fixedly provided with a contact piece which is used for being in contact with the pushing disc and is matched with the pushing disc, and the top surface of the contact piece, which faces the pushing disc, is a spherical surface.
7. The hydraulic parking brake of claim 5 wherein: the braking mechanism comprises a sliding pin, a first braking block arranged on the caliper body and a second braking block in contact fit with the pressure arm are respectively sleeved at two ends of the sliding pin in a sliding fit manner, a spring positioned between the first braking block and the second braking block is sleeved on the sliding pin, and a braking disc is arranged between the first braking block and the second braking block; and the pressure arm is provided with a spherical contact surface which is in contact fit with the second brake block and protrudes upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751691.2A CN107524737B (en) | 2017-08-28 | 2017-08-28 | Hydraulic parking brake and braking clearance compensation mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751691.2A CN107524737B (en) | 2017-08-28 | 2017-08-28 | Hydraulic parking brake and braking clearance compensation mechanism thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107524737A CN107524737A (en) | 2017-12-29 |
| CN107524737B true CN107524737B (en) | 2023-08-01 |
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| CN201710751691.2A Active CN107524737B (en) | 2017-08-28 | 2017-08-28 | Hydraulic parking brake and braking clearance compensation mechanism thereof |
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| CN110345182B (en) * | 2019-05-28 | 2020-11-20 | 中国北方车辆研究所 | Parking braking device applied to electric wheel driven vehicle |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB900003A (en) * | 1960-01-22 | 1962-07-04 | Perrot Bremse Gmbh Deutsche | Centering and adjusting device for internal expanding shoe brakes on wheeled vehicles |
| DE3303576C1 (en) * | 1983-02-03 | 1984-05-24 | Rockwell Golde Gmbh, 6000 Frankfurt | Detent pawl arrangement for the automatic adjusting device of a drum brake |
| SE8605118D0 (en) * | 1985-11-29 | 1986-11-28 | Akebono Brake Ind | BRAKE CYLINDER WITH BUILT-IN SELF ADJUSTMENT |
| EP0491449A2 (en) * | 1990-12-17 | 1992-06-24 | MANNESMANN Aktiengesellschaft | Automatical or manual brake shock slack adjusting device on brakes with brake rods, especially for brakes of railway vehicles |
| JPH09112604A (en) * | 1995-10-16 | 1997-05-02 | Mitsubishi Heavy Ind Ltd | Gap adjusting mechanism of wet type disc brake |
| JPH10246259A (en) * | 1997-03-07 | 1998-09-14 | Nisshinbo Ind Inc | Inter-pad gap adjusting device for disc brake |
| CN2527780Y (en) * | 2002-02-09 | 2002-12-25 | 刘连忠 | Disc brake parking automatic compensating liftout mechanism |
| CN102252050A (en) * | 2011-07-13 | 2011-11-23 | 浙江万安科技股份有限公司 | Clearance compensation mechanism of gas-pressure plate type brake |
| CN202170947U (en) * | 2011-06-11 | 2012-03-21 | 山东蓬翔汽车有限公司 | Novel multi-disc brake |
| CN202251585U (en) * | 2011-07-13 | 2012-05-30 | 浙江万安科技股份有限公司 | Backlash compensating mechanism of air disc brake |
| FR3015409A1 (en) * | 2013-12-23 | 2015-06-26 | Chassis Brakes Int Bv | IMPROVED DISK BRAKE COMPRISING A HYDRAULICALLY ACTUATED PARKING BRAKE AND A WEAR TURNING GROUP |
| CN105485224A (en) * | 2016-01-14 | 2016-04-13 | 枣庄泰德机械有限公司 | Automatic brake clearance adjustment mechanism assembly |
-
2017
- 2017-08-28 CN CN201710751691.2A patent/CN107524737B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB900003A (en) * | 1960-01-22 | 1962-07-04 | Perrot Bremse Gmbh Deutsche | Centering and adjusting device for internal expanding shoe brakes on wheeled vehicles |
| DE3303576C1 (en) * | 1983-02-03 | 1984-05-24 | Rockwell Golde Gmbh, 6000 Frankfurt | Detent pawl arrangement for the automatic adjusting device of a drum brake |
| SE8605118D0 (en) * | 1985-11-29 | 1986-11-28 | Akebono Brake Ind | BRAKE CYLINDER WITH BUILT-IN SELF ADJUSTMENT |
| EP0491449A2 (en) * | 1990-12-17 | 1992-06-24 | MANNESMANN Aktiengesellschaft | Automatical or manual brake shock slack adjusting device on brakes with brake rods, especially for brakes of railway vehicles |
| JPH09112604A (en) * | 1995-10-16 | 1997-05-02 | Mitsubishi Heavy Ind Ltd | Gap adjusting mechanism of wet type disc brake |
| JPH10246259A (en) * | 1997-03-07 | 1998-09-14 | Nisshinbo Ind Inc | Inter-pad gap adjusting device for disc brake |
| CN2527780Y (en) * | 2002-02-09 | 2002-12-25 | 刘连忠 | Disc brake parking automatic compensating liftout mechanism |
| CN202170947U (en) * | 2011-06-11 | 2012-03-21 | 山东蓬翔汽车有限公司 | Novel multi-disc brake |
| CN102252050A (en) * | 2011-07-13 | 2011-11-23 | 浙江万安科技股份有限公司 | Clearance compensation mechanism of gas-pressure plate type brake |
| CN202251585U (en) * | 2011-07-13 | 2012-05-30 | 浙江万安科技股份有限公司 | Backlash compensating mechanism of air disc brake |
| FR3015409A1 (en) * | 2013-12-23 | 2015-06-26 | Chassis Brakes Int Bv | IMPROVED DISK BRAKE COMPRISING A HYDRAULICALLY ACTUATED PARKING BRAKE AND A WEAR TURNING GROUP |
| CN105485224A (en) * | 2016-01-14 | 2016-04-13 | 枣庄泰德机械有限公司 | Automatic brake clearance adjustment mechanism assembly |
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| CN107524737A (en) | 2017-12-29 |
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