CN210461490U

CN210461490U - Automatic brake clearance adjuster of brake

Info

Publication number: CN210461490U
Application number: CN201920968284.1U
Authority: CN
Inventors: 董敏; 王华英
Original assignee: Wuhan Buruike Automotive Industry Technology Co ltd
Current assignee: Wuhan Buruike Automotive Industry Technology Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-05-05
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses a stopper braking clearance automatic regulator, this stopper braking clearance regulator includes the screw rod, the apparatus further comprises a rotating shaft, the adjusting sleeve, the rolling circle, the torsional spring, one-way driving medium and locking cap, the screw rod is connected with the pivot cooperation, the torsional spring is established to the outside cover in proper order of pivot, rolling circle and adjusting sleeve, the torsional spring is located rolling circle and adjusting sleeve simultaneously and the pivot between the interval that forms, one-way driving medium cover is located the pivot and is located the rolling circle and the pivot forms the interval outward, one-way driving medium just is used for driving the pivot rotation with the pivot cooperation, one-way driving medium is located torsional spring upper portion, the locking cap cover is established in the pivot and is used for compressing tightly the rolling circle in the tip that is located rolling circle and one-way driving medium, locking. The utility model provides a stopper braking lash adjuster stand wear and tear, the deformation force is little, the cohesion performance is good, and the response lag time is short, and the braking clearance that can effectual compensation brake production has further improved the stopper performance.

Description

Automatic brake clearance adjuster of brake

Technical Field

The utility model relates to a vehicle brake adjusts technical field, especially relates to a stopper braking clearance automatic regulator.

Background

The air pressure disc brake is one of disc brakes, starts in the last 90 th century and can be widely applied to large-scale passenger vehicles and trucks. The air pressure disc brake has the characteristics of quick heat dissipation, light weight, simple structure, automatic adjustment of abrasion clearance and the like, particularly has good high-temperature resistance and stable braking effect, can obviously reduce the braking distance, and provides reliable service guarantee for vehicles.

The types of the air pressure disc brakes developed by various companies at home and abroad, particularly the gap self-adjusting structures of the double-push-rod air pressure disc brake are more, for example, if the Schfler patent structure integrated one-way ball bearing clutch is adopted by the Kenolr company, the product performance is stable but the price is high; the structural development of the Swedish Han-De brake is not seen in the new products after the structural development of the large and small torsion springs of the first generation and the second generation.

In the related technology, the brake clearance automatic adjusting structure of the brake adopts the traditional big and small double torsion spring mode, and the adjusting structure of the big and small double torsion springs has the problems of unstable brake clearance, short service life and the like during brake adjustment. The adjusting structure adopting the large and small double-torsion spring structure is limited by the space of the appearance size of the rotating shaft component and the installation wall thickness of peripheral parts because the small torsion spring is arranged between the large torsion spring and the active rotating shaft and the rotating ring, the cross section and the middle diameter of the rectangular steel wire of the small torsion spring are undersized, so that the rigidity of the small torsion spring is insufficient, the problems of serious abrasion of the inner ring, large middle diameter, bulging and the like can be caused after the small torsion spring continuously and repeatedly works for a long time, the capability of tightly holding the active rotating shaft by the small torsion spring is poor, the dynamic response time is delayed, the adjusting structure can not achieve the purpose of compensating the brake clearance, and the comprehensive service life of.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, embodiments of the present invention provide an automatic brake clearance adjuster with wear resistance, small stress deformation, strong holding capacity and short dynamic response lag time.

The technical scheme of the utility model is realized like this:

an automatic brake clearance adjuster of a brake comprises a screw rod, a rotating shaft, an adjusting sleeve, a rotating ring, a torsional spring, a one-way transmission piece and a locking cap, the screw rod is matched and connected with the rotating shaft, the torsional spring, the rotating ring and the adjusting sleeve are sequentially sleeved outside the rotating shaft, the torsion spring is arranged in the interval formed between the rotating ring and the adjusting sleeve and the rotating shaft, the one-way transmission piece is sleeved outside the rotating shaft and embedded in a gap formed by the rotating ring and the rotating shaft, the one-way transmission piece is matched with the rotating shaft and is used for driving the rotating shaft to rotate, the one-way transmission piece is positioned at the upper part of the torsion spring, the locking cap is sleeved on the rotating shaft and arranged at the end parts of the rotating ring and the one-way transmission piece to tightly press the rotating ring, and the locking cap is fixedly connected with the adjusting sleeve.

Preferably, the rotating ring includes a main body, a fitting portion extending from a periphery of the main body in a bent manner, and a transmission portion extending from a middle of the main body in a bent manner, the fitting portion and the transmission portion are bent in directions away from each other, an accommodating space is formed between a portion of the main body located between the fitting portion and the transmission portion and the adjusting sleeve and the locking cap, and a plurality of rolling bodies are disposed in the accommodating space.

Preferably, a rolling path is formed in a portion of the body portion located between the matching portion and the transmission portion, the rolling elements are arranged in the rolling path, and the rolling path is an arc surface formed by downward sinking from the body portion.

Preferably, an annular fixing table protrudes from the inside of the adjusting sleeve, and the end of the rotating ring is supported on the annular fixing table.

Preferably, the bottom of the adjusting sleeve is provided with an open slot which is convenient for the adjusting sleeve to be stirred.

Preferably, the torsion spring and the adjusting sleeve, and the torsion spring and the rotating ring are in interference fit.

Preferably, the one-way transmission piece is a one-way clutch bearing, and the rolling body is a steel ball.

Preferably, the locking cap and the adjusting sleeve are fixedly connected through a screw.

Preferably, the screw rod is connected with the rotating shaft in a threaded fit manner.

Preferably, the locking device further comprises a limiting ring arranged at the end part of the rotating shaft and used for preventing the locking cap from being scraped axially.

The brake clearance adjuster provided by the embodiment of the utility model has the advantages that the unidirectional transmission part is embedded in the interval formed between the rotating ring and the rotating shaft, the unidirectional transmission part is used for transmitting the power from the rotating ring to drive the rotating shaft to rotate, the rotating shaft rotates and generates relative motion with the screw matched with the rotating shaft, and further the purpose of compensating the brake clearance is realized, wherein, the unidirectional transmission part is arranged at the top of the rotating shaft, the structural size of the unidirectional transmission part is not limited by the torsional spring and the rotating ring in the radial direction and the axial direction, the large-size structural design of the unidirectional transmission part can be realized to improve the bearing capacity, the unidirectional transmission part with high bearing capacity drives the rotating shaft to rotate, the abrasion of the unidirectional transmission part and the rotating shaft under the action of long-term repeated load in the matched connection is greatly reduced, and the unidirectional transmission part and the holding force of the rotating shaft are kept effective, and the transmission effect with the rotating shaft is good, the compensation capability of the adjuster for compensating the brake clearance of the brake is effectively improved, and the brake performance of the brake is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a brake lash adjuster provided by the present invention;

FIG. 2 is a schematic structural view of the spindle shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the rotating ring shown in FIG. 1;

FIG. 4 is a schematic view of the adjustment sleeve shown in FIG. 1;

FIG. 5 is a schematic structural view of the rolling element shown in FIG. 1;

fig. 6 is a schematic structural view of the locking cap shown in fig. 1.

Detailed Description

In order to illustrate embodiments of the present invention or technical solutions in the prior art more clearly, the following description will be made in conjunction with the accompanying drawings in embodiments of the present invention to describe the technical solutions in the embodiments of the present invention clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1, which is a schematic structural diagram of an automatic brake clearance adjuster of a brake according to the present invention. The utility model provides a stopper braking clearance automatic regulator includes screw rod 1, pivot 2, adjustment sleeve 3, rotation circle 4, torsional spring 5, one-way driving medium 6, locking cap 7 and spacing collar 8, screw rod 1 with 2 cooperations of pivot are connected, locking cap 7 one-way driving medium 6 the rotation circle 4 the torsional spring 5 and adjustment sleeve 3 overlaps respectively and locates outside the pivot 2.

Please refer to fig. 2, which is a schematic structural diagram of the rotating shaft shown in fig. 1. The rotating shaft 2 is a stepped shaft, and the torsion spring 5, the rotating ring 4 and the adjusting sleeve 3 are sequentially sleeved outside the stepped shaft. Wherein, an interval is formed between one end of the rotating ring 4 and the adjusting sleeve 3 and the rotating shaft 2 at the same time, and the torsion spring 5 is sleeved outside the rotating shaft 2 and is pressed into the interval formed between one end of the rotating ring 4 and the rotating shaft 2; meanwhile, an interval is formed between the other end of the rotating ring 4 and the rotating shaft 2, and the one-way transmission piece 6 is sleeved outside the rotating shaft 2 and is embedded in the interval formed between the other end of the rotating ring 4 and the rotating shaft 2. The locking cap 7 is sleeved on the rotating shaft 2 and is arranged at the end parts of the rotating ring 4 and the one-way transmission piece 6 so as to compress the rotating ring 4, and the locking cap 7 is fixedly connected with the adjusting sleeve 3. The adjusting sleeve 3 is stirred to rotate by a stirring pin of the brake, the adjusting sleeve 3 drives the rotating ring 4 and the locking cap 7 to rotate, the rotating ring 4 drives the one-way transmission piece 6 to rotate, and the torsion spring 5 is driven to rotate by the adjusting sleeve 3 and the rotating ring 4.

Please refer to fig. 3, which is a schematic structural diagram of the rotating ring shown in fig. 1. The rotating ring 4 includes a main body 41, a fitting portion 43 bent and extended from a periphery of the main body 41, and a transmission portion 45 bent and extended from a middle portion of the main body 41, and bending directions of the fitting portion 43 and the transmission portion 45 are deviated from each other.

The part of the body part 41 between the matching part 43 and the transmission part 45 and the adjusting sleeve 3 and the locking cap 7 form a containing space, and a plurality of rolling bodies 9 are arranged in the containing space.

A raceway 411 is formed in a portion of the main body 41 located between the matching portion 43 and the transmission portion 45, the rolling elements 9 are disposed in the raceway 411, and specifically, the raceway 411 is an arc surface formed by a downward recess from an upper surface of the main body 41. A plurality of the mutual butt of rolling element 9 forms the round, works as torsional spring 5 floats and drives rotate circle 4 rolling element 9 withstands locking cap 7 takes place when the relative motion is asynchronous, rolling element 9 is in produce rolling friction in the raceway 411, has avoided rotate circle 4 with locking cap 7 coupling portion's sliding friction, make the friction torque of extra increase little, it is little to the influence degree of the predetermined protection moment value of stopper, has further reduced the stopper braking risk of locking.

The one-way transmission part 6 is a one-way clutch bearing and is embedded in an interval formed between the transmission part 45 and the rotating shaft 2, the one-way transmission part 6 is connected with the rotating shaft 2 in a matching mode and is used for transmitting power from the rotating ring 4 to drive the rotating shaft 2 to rotate, the rotating shaft 2 rotates and is matched with the rotating ring to generate relative motion between the screw rods 1, and therefore the purpose of compensating the braking clearance of the brake is achieved. The one-way transmission part 6 is arranged at the top of the rotating shaft 2, the structural size of the one-way transmission part is not limited by the torsion springs 5 and the rotating rings 4 in the radial direction and the axial direction, the bearing capacity can be improved through the large-size structural design of the one-way transmission part 6, in this way, the one-way transmission part 6 with high bearing capacity is matched with the rotating shaft 2 with a high-hardness surface, the abrasion of the one-way transmission part 6 and the rotating shaft 2 under the action of long-term repeated load in matched connection is greatly reduced, the holding force of the one-way transmission part 6 and the rotating shaft 2 is kept effective, the transmission effect of the rotating shaft 2 is good, the compensation capacity of the regulator for compensating the brake clearance is effectively improved, and the problems of poor holding capacity and serious response delay caused by the fact that small torsion springs in a large-small double-torsion spring structure are subjected.

Please refer to fig. 4, which is a schematic structural diagram of the adjusting sleeve shown in fig. 1. An annular fixed station 31 protrudes from the inside of the adjusting sleeve 3, an open slot 33 convenient for the adjusting sleeve 3 to be shifted by a brake shifting pin is formed in the bottom of the adjusting sleeve 3, and the end part of the rotating ring 4 is supported on the annular fixed station 31.

The torsion spring 5 is arranged in the gap formed between the matching part 43 and the annular fixing table 31 and the rotating shaft 2, and the torsion spring 5 is positioned on the torsion spring and does not contact with the torsion spring. The torsion spring 5 is in interference fit with the annular fixing table 31, the torsion spring 5 and the rotating ring 4. The torsion spring 5 is made of steel wires, the cross section of each steel wire is rectangular, and the torsion spring 5 is wound along a spiral line and is tight. The external diameter of torsional spring 5 is greater than adjusting sleeve 3 forms interference fit, works as 5 one side of torsional spring by adjusting sleeve 3 drives and when the follow-up rotation, the diameter of torsional spring 5 can be followed the spiral line and reduced until with adjusting sleeve 3 or rotating ring 4 breaks away from, 5 intermittent type's realization of torsional spring with adjusting sleeve 3 or rotating ring 4's rigid connection. When the diameter of the torsion spring 5 is reduced, the torsion spring 5 intermittently floats in the restriction range surrounded by the adjusting sleeve 3 and the rotating ring 4, so that the overload protection of the torsion spring 5 is realized, and the service life of the torsion spring 5 is prolonged.

Fig. 5 is a schematic structural diagram of the rolling element shown in fig. 1. Specifically, in the present embodiment, the rolling elements 9 are steel balls. A plurality of steel balls abut against each other in the raceway 411 to form an annular ring.

Please refer to fig. 6, which is a schematic structural diagram of the locking cap shown in fig. 1. The locking cap 7 and the adjusting sleeve 3 are fixedly connected through a screw 10, a plurality of threaded holes 71 are uniformly formed in the brim of the locking cap 7, the screw 10 penetrates through the threaded hole 71 and is fixedly connected with the adjusting sleeve 3 into a whole for pressing the one-way transmission member 6 and the rotating ring 4, when the rotating ring 4 and the rolling body 9 are floated by the torsion spring 5 and are lifted against the locking cap 7, the phenomenon of asynchronous movement will occur between the adjusting sleeve 3 and the locking cap 7 rigidly connected with the adjusting sleeve and the rotating ring 4 along with the overload protection function of the torsion spring 5, the adjusting sleeve 3 and the locking cap 7 continue to be stirred and rotated by a stirring pin, the rotating ring 4 does not follow up, at the moment, the rolling body 9 is rubbed and rotated between the raceway and the bottom plane of the locking cap 7, and the rolling friction force is small, the influence degree of the additionally increased additional protection torque on the preset value is small, and the influence degree on the abrasion and the service life of the one-way transmission piece 6 is small, so that the service life of the one-way transmission piece 6 is effectively prolonged under the action of the rolling body 9, the adjusting capacity of the adjuster on the brake clearance of the brake is effectively guaranteed, and the brake safety of the brake is effectively guaranteed.

The screw rod 1 with pivot 2 is connected through screw thread fit, and is concrete, threaded hole 71 is seted up to the inside one end of pivot 2, screw rod 1 through threaded hole 71 with pivot 2 is connected.

The limiting ring 8 is arranged at the end part of the rotating shaft 2 to axially limit the locking cap 7 so as to prevent the locking cap 7 from being axially scraped, so that a closed cavity is formed to accommodate the one-way transmission piece needing precise matching, the abrasion of external dust particles to a precise matching surface is isolated, and the service life of the one-way transmission piece is further prolonged.

Specifically, in this embodiment, the limiting ring 8 is a snap spring. The periphery of the end part of the rotating shaft 2 is provided with a positioning groove 21, and the clamp spring is embedded in the positioning groove 21.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic brake clearance adjuster of a brake is characterized by comprising a screw rod, a rotating shaft, an adjusting sleeve, a rotating ring, a torsion spring, a one-way transmission piece and a locking cap, the screw rod is matched and connected with the rotating shaft, the torsional spring, the rotating ring and the adjusting sleeve are sequentially sleeved outside the rotating shaft, the torsion spring is arranged in the interval formed between the rotating ring and the adjusting sleeve and the rotating shaft, the one-way transmission piece is sleeved outside the rotating shaft and embedded in a gap formed by the rotating ring and the rotating shaft, the one-way transmission piece is matched with the rotating shaft and is used for driving the rotating shaft to rotate, the one-way transmission piece is positioned at the upper part of the torsion spring, the locking cap is sleeved on the rotating shaft and arranged at the end parts of the rotating ring and the one-way transmission piece to tightly press the rotating ring, and the locking cap is fixedly connected with the adjusting sleeve.

2. The automatic brake slack adjuster according to claim 1, wherein the rotating ring includes a body portion, an engaging portion bent and extended from a periphery of the body portion, and a transmission portion bent and extended from a middle portion of the body portion, wherein bending directions of the engaging portion and the transmission portion are away from each other, a receiving space is formed between a portion of the body portion between the engaging portion and the transmission portion and the adjusting sleeve and the locking cap, and a plurality of rolling elements are disposed in the receiving space.

3. The automatic brake clearance adjuster according to claim 2, wherein a raceway is defined in a portion of the body between the engaging portion and the transmission portion, and the rolling elements are disposed in the raceway, and the raceway is an arc surface formed by a downward recess from the body.

4. The automatic brake slack adjuster according to claim 1, wherein an annular fixing base is protruded from an inside of the adjusting sleeve, and an end of the rotating ring is supported by the annular fixing base.

5. The automatic brake clearance adjuster according to claim 1, wherein the bottom of the adjusting sleeve is provided with an open slot for allowing the adjusting sleeve to be shifted.

6. The automatic brake slack adjuster according to claim 1, wherein the torsion spring and the adjustment sleeve, and the torsion spring and the rotating ring are in interference fit.

7. The automatic brake slack adjuster according to claim 2, wherein the one-way transmission member is a one-way clutch bearing, and the rolling elements are steel balls.

8. The automatic brake slack adjuster according to claim 1, wherein the locking cap is fixed to the adjusting sleeve by a screw.

9. The automatic brake clearance adjuster according to claim 1, wherein said screw is threadedly engaged with said shaft.

10. The automatic brake clearance adjuster according to any one of claims 1 to 9, further comprising a retainer ring provided at an end of the rotation shaft for preventing the locking cap from being axially moved.