CN111976679A

CN111976679A - Parking braking wire drawing mechanism

Info

Publication number: CN111976679A
Application number: CN202010907973.9A
Authority: CN
Inventors: 孙光仙; 孙海燕; 刘天伍; 何敬梅
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-11-24
Anticipated expiration: 2040-08-31
Also published as: CN111976679B

Abstract

The invention discloses a parking brake wire drawing mechanism which comprises a shell, a wire drawing assembly, an adjusting wire drawing sheath and an adjusting component, wherein the shell is provided with a mounting cavity extending in the front-back direction, the wire drawing assembly comprises wire drawing arranged in the front-back direction, the wire drawing is movably mounted in the mounting cavity in the front-back direction, the adjusting wire drawing sheath is sleeved on the wire drawing, one end of the adjusting wire drawing sheath is movably mounted in the mounting cavity in the front-back direction, the adjusting component is arranged in the mounting cavity and is connected with a wire drawing drive to drive and adjust the wire drawing sheath to move, the adjusting wire drawing sheath is driven and adjusted to move through the adjusting component, so that the adjusting wire drawing sheath moves away from the mounting cavity, the adjusting wire drawing sheath on the parking wire drawing sheath is automatically adjusted, the length between a wire drawing end and an outer sheath is reduced, the free stroke of.

Description

Parking braking wire drawing mechanism

Technical Field

The invention relates to the technical field of automobile parking brake systems, in particular to a parking brake wire drawing mechanism.

Background

Along with the abrasion of a drum brake friction plate, the free stroke of a parking brake swing rod is increased, the total stroke transmitted to a parking brake handle is correspondingly increased and gradually exceeds the working stroke of the parking brake handle, so that the force acting on a brake shoe is correspondingly reduced, the parking brake capability is reduced, the requirement of a vehicle on the parking brake capability cannot be met, an operator needs to manually adjust an adjusting wire drawing sheath on a parking wire drawing sheath frequently, the length of the wire drawing sheath is increased, the length between a wire drawing end and the sheath is reduced, the free stroke of a parking brake swing arm is reduced, the requirement of the vehicle on the parking brake capability is met, the workload of the operator is increased, and the operation is complicated.

Disclosure of Invention

The invention mainly aims to provide a parking brake wire drawing mechanism, which aims to automatically adjust an adjusting wire drawing sheath on a parking wire drawing outer sheath, reduce the length between a wire drawing end and the outer sheath, reduce the free stroke of a parking brake swing arm, reduce the workload of an operator and realize simple operation.

In order to achieve the above object, the present invention provides a parking brake wire drawing mechanism, comprising:

the shell is provided with a mounting cavity extending in the front-back direction;

the wire drawing assembly comprises wire drawing wires which extend in the front-back direction, and the wire drawing wires are movably arranged in the mounting cavity in the front-back direction;

the adjusting wire drawing sheath is sleeved on the wire drawing, and one end of the adjusting wire drawing sheath is movably arranged in the mounting cavity along the front-back direction; and the number of the first and second groups,

and the adjusting assembly is arranged in the mounting cavity and is connected with the wire drawing drive so as to drive the wire drawing sheath to move.

Optionally, one end of the adjusting wire drawing sheath, which is mounted in the mounting cavity, is a mating end, and an external thread is arranged on the outer wall surface of the mating end;

the adjustment assembly includes:

the adjusting sleeve is rotatably arranged in the mounting cavity, an internal thread matched with the external thread is arranged on the inner wall of the adjusting sleeve, and the adjusting sleeve is sleeved outside the matching end in a threaded manner;

the rotation driving mechanism is used for driving the adjusting sleeve to rotate; and the number of the first and second groups,

and the rotation stopping structure is arranged between the matching end and the shell.

Optionally, the rotation stopping structure includes a rotation stopping post and a rotation stopping surface, an end surface of the rotation stopping post is attached to the rotation stopping surface, one of the rotation stopping post and the rotation stopping surface is disposed at the mating end, and the other is disposed at the housing.

Optionally, the rotational drive mechanism comprises:

the ratchet wheel driving mechanism comprises a ratchet wheel sleeve and a pawl, the ratchet wheel sleeve is sleeved on the adjusting sleeve, and one end of the pawl is matched with the ratchet wheel sleeve; and the number of the first and second groups,

the poking assembly comprises a poking column which extends in the left-right direction, and the poking column is movably arranged in the mounting cavity in the left-right direction;

wherein, the other end of the pawl is arranged on the toggle column.

Optionally, one end of the toggle column is an abutting end;

the rotation drive mechanism further includes:

the pushing column extends in the front-back direction, the pushing column has a movable stroke in the front-back direction, and one end, facing the poking block, of the pushing column is a pushing end; and the number of the first and second groups,

the driving inclined plane structure comprises a driving inclined plane and a matching inclined plane which are matched with each other, and the driving inclined plane and the matching inclined plane are correspondingly arranged at the pushing end and the abutting end respectively.

Optionally, the toggle column has a connection end opposite to the abutting end, and a first return spring is arranged between the connection end and the inner wall of the installation cavity.

Optionally, the toggle column is provided with a connecting end opposite to the abutting end, the toggle column is arranged in an inclined manner, and the toggle column is gradually far away from the adjusting sleeve in the direction from the connecting end to the abutting end.

Optionally, the housing is provided with a mounting hole corresponding to the pushing column, and the mounting hole is arranged in a stepped manner along the front and back direction to form a first stepped surface arranged towards the shifting column;

the push column is arranged in a step shape along the front-back direction to form a second step surface deviating from the push column, a second reset spring is sleeved on the push column and is located between the first step surface and the second step surface.

Optionally, a driving deflector rod is arranged on the wire drawing and extends up and down;

the rotation drive mechanism further includes:

the adjusting push rod extends forwards and backwards, and an adjusting groove extending forwards and backwards is formed in the middle of the adjusting push rod;

the swing rod extends in the left-right direction, the middle of the swing rod is rotatably mounted on the inner wall of the mounting cavity, the left end of the swing rod is hinged with one end of the adjusting push rod, and the right end of the swing rod is hinged with the other end of the pushing column;

wherein, the driving deflector rod is movably arranged in the adjusting groove.

Optionally, a long connecting groove extending in the left-right direction is formed at the right end of the swing rod;

one end of the push column, which is hinged with the swing rod, is provided with a connecting shaft which extends vertically, and the connecting shaft is arranged in the long connecting groove.

According to the technical scheme provided by the invention, the adjusting wire drawing sheath is driven to move by the adjusting component, so that the adjusting wire drawing sheath is far away from the mounting cavity to move, the adjusting wire drawing sheath on the parking wire drawing sheath is automatically adjusted, the length between a wire drawing end and the outer sheath is reduced, the free stroke of a parking braking swing arm is reduced, the workload of an operator is reduced, and the operation is simple.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a parking brake pull mechanism provided by the present invention;

FIG. 2 is a schematic diagram of a portion of the parking brake pull mechanism of FIG. 1;

FIG. 3 is a schematic perspective view of a portion of the parking brake pull mechanism of FIG. 1;

FIG. 4 is a schematic perspective view of the adjustment sleeve of FIG. 2;

FIG. 5 is a schematic view of the structure of the mating end of the alignment wiredrawing sheath of FIG. 2;

FIG. 6 is a schematic view of the pushing column of FIG. 2;

FIG. 7 is a schematic view of the toggle post of FIG. 2;

FIG. 8 is a schematic view of the structure of the wire of FIG. 2;

FIG. 9 is a schematic view of the adjustment push rod of FIG. 2;

fig. 10 is a schematic structural diagram of the swing link in fig. 2.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Parking braking wire drawing mechanism	44	Pushing column
1	Shell body	45	Driving bevel structure
				11	Mounting cavity	451	Driving ramp
12	Mounting hole	452	Matching inclined plane
				21	Drawing wire	46	Adjusting push rod
211	Driving deflector rod	461	Adjusting groove
				3	Adjusting wire drawing sheath	47	Swing link
41	Adjusting sleeve	471	Long connecting groove
				421	Rotation stopping column	5	First return spring
422	Anti-rotation noodle	6	Second return spring
				431	Ratchet driving mechanism	7	Connecting shaft
4311	Ratchet sleeve	a	Abutting end
				4312	Pawl	b	Push end
432	Toggle assembly	c	Connecting end
				4321	Striking column	d	First step surface
43211	Groove	e	Second step surface

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a parking brake wire drawing mechanism, wherein fig. 1 to 10 are schematic structural diagrams of an embodiment of the parking brake wire drawing mechanism provided by the invention.

Referring to fig. 1 to 3, the parking brake wire drawing mechanism 100 includes a housing 1, a wire drawing assembly, an adjusting wire drawing sheath 3 and an adjusting component, wherein the housing 1 is formed with an installation cavity 11 extending in a front-back direction, the wire drawing assembly includes a wire drawing 21 extending in the front-back direction, the wire drawing 21 is movably installed in the installation cavity 11 in the front-back direction, the adjusting wire drawing sheath 3 is sleeved on the wire drawing 21, one end of the adjusting wire drawing sheath 3 is movably installed in the installation cavity 11 in the front-back direction, and the adjusting component is installed in the installation cavity 11 and is in driving connection with the wire drawing 21 to drive the adjusting wire drawing sheath 3 to move.

According to the technical scheme provided by the invention, the adjusting wire drawing sheath 3 is driven to move by the adjusting component, so that the adjusting wire drawing sheath 3 moves away from the mounting cavity 11, the adjusting wire drawing sheath 3 on the parking wire drawing sheath is automatically adjusted, the length between the end of a wire drawing 21 and the outer sheath is reduced, the free stroke of a parking braking swing arm is reduced, the workload of an operator is reduced, and the operation is simple.

In order to enable one end of the adjusting wire drawing sheath 3 to be movably arranged in the installation cavity 11 in the front-back direction, the end, arranged in the installation cavity 11, of the adjusting wire drawing sheath 3 is a matching end, an external thread is arranged on the outer wall surface of the matching end, the adjusting assembly comprises an adjusting sleeve 41, a rotation driving mechanism and a rotation stopping structure, the adjusting sleeve 41 is rotatably arranged in the installation cavity 11, an internal thread matched with the external thread is arranged on the inner wall of the adjusting sleeve 41, the adjusting sleeve 41 is sleeved outside the matching end in a threaded manner, the rotation driving mechanism is used for driving the adjusting sleeve 41 to rotate, the rotation stopping structure is arranged between the matching end and the shell 1, and therefore, due to the fact that the matching end of the adjusting wire drawing sheath 3 is in threaded connection with the adjusting sleeve 41, when the rotation driving mechanism drives the adjusting sleeve 41 to rotate, because the rotation stopping structure is used, the adjusting wire drawing sheath 3 is movably arranged in the mounting cavity 11 in the front-back direction, so that the adjusting wire drawing sheath 3 on the parking wire drawing sheath can be automatically adjusted, and the length between the end of the wire drawing 21 and the outer sheath can be reduced.

Specifically, referring to fig. 3, the rotation stopping structure includes a rotation stopping column 421 and a rotation stopping surface 422, an end surface of one end of the rotation stopping column 421 is attached to the rotation stopping surface 422, one of the rotation stopping column 421 and the rotation stopping surface 422 is disposed at the mating end, and the other is disposed at the housing 1, so that the adjustment wire drawing sheath 3 is prevented from rotating along with the adjustment sleeve 41 by attaching the end surface of one end of the rotation stopping column 421 to the rotation stopping surface 422, and the adjustment wire drawing sheath 3 only has a forward and backward moving stroke.

Referring to fig. 2, 4 and 5, the rotation driving mechanism includes a ratchet driving mechanism 431 and a toggle assembly 432, the ratchet driving mechanism 431 includes a ratchet sleeve 4311 and a pawl 4312, the ratchet sleeve 4311 is sleeved on the adjusting sleeve 41, one end of the pawl 4312 is engaged with the ratchet sleeve 4311, the toggle assembly 432 includes a toggle column 4321 extending in the left-right direction, the toggle column 4321 is movably installed in the installation cavity 11 in the left-right direction, wherein the other end of the pawl 4312 is installed on the toggle column 4321, so that because the toggle column 4321 is movably installed in the installation cavity 11 in the left-right direction and the other end of the pawl 4312 is installed on the toggle column 4321, when the toggle column 4321 is moved, the pawl 4312 drives the ratchet sleeve 4311 to rotate, so that the adjusting sleeve 41 rotates along with the ratchet sleeve 4311, when the toggle column 4321 is reset, the pawl 4312 and the ratchet sleeve 4311 are dislocated and avoided, the pawl 4312 resets along with the toggle column 4321, and the ratchet sleeve 4311 does not rotate, so that one-time adjustment of the wire drawing sheath 3 is realized.

Specifically, referring to fig. 2, 6 and 7, one end of the toggle column 4321 is an abutting end a, the rotation driving mechanism further includes a pushing column 44 and a driving inclined surface structure 45, the pushing column 44 extends in the forward and backward directions, the pushing column 44 has a forward and backward moving stroke, one end of the pushing column 44 facing the toggle block is a pushing end b, the driving inclined surface structure 45 includes a driving inclined surface 451 and a matching inclined surface 452, which are mutually matched, the driving inclined surface 451 and the matching inclined surface 452 are respectively and correspondingly disposed at the pushing end b and the abutting end a, so that by matching the driving inclined surface 451 and the matching inclined surface 452, when the pushing column 44 moves toward the toggle column 4321, the toggle column 4321 is pushed to move, so that the pawl 4312 pushes the ratchet sleeve 4311 to move, and the adjustment sleeve 41 is driven to rotate by the ratchet sleeve 4311, simple structure and good effect.

Further, the toggle column 4321 has a connection end c opposite to the abutting end a, and a first return spring 5 is disposed between the connection end c and the inner wall of the installation cavity 11, so that the toggle column 4321 is pushed by the first return spring 5 to return, and preparation is made for adjusting the adjusting sleeve 41 of the next wire drawing 21.

Specifically, referring to fig. 2, 3 and 7, the connecting end c is concavely provided with a groove 43211 extending in the front-back direction, the pawl 4312 is rotatably installed in the groove 43211, one end of the first return spring 5 abuts against the notch of the groove 43211, when the pawl 4312 rotates towards the connecting end c, the bottom of the groove 43211 limits the rotation of the pawl 4312, so that the pawl 4312 moves along with the toggle column 4321 to drive the ratchet sleeve 4311 to rotate, thereby driving the adjustment sleeve 41 to move, and when the toggle column 4321 moves towards the abutting end a, the pawl 4312 compresses the first return spring 5 towards the notch of the groove 43211 to rotate so as to disengage from the ratchet sleeve 4311, thereby preventing the ratchet sleeve 4311 from rotating.

Referring to fig. 2 and 7, the toggle column 4321 has a connection end c opposite to the abutting end a, the toggle column 4321 is disposed in an inclined manner, and the toggle column 4321 is disposed away from the adjustment sleeve 41 gradually from the connection end c toward the abutting end a, so that when the push column 44 pushes the toggle column 4321 to move, the toggle column 4321 also has a moving stroke close to the adjustment sleeve, so that the pawl 4312 can better cooperate with the ratchet sleeve 4311, and when the toggle column 4321 returns to the initial position, the toggle column 4321 also has a moving stroke away from the adjustment sleeve 41, so that the pawl 4312 avoids the ratchet sleeve 4311, and the pawl 4312 is prevented from moving when rotating to drive the ratchet sleeve 4311 to move, which is simple in structure and has a good effect.

Consider promote reseing of post 44, casing 1 corresponds promote post 44 is provided with mounting hole 12, mounting hole 12 is the step setting along preceding backward to, in order to form the orientation stir the first step face d that post 4321 set up, promote post 44 and be the step setting along the fore-and-aft direction, in order to form and deviate from stir the second step face e of post 4321, it is equipped with second reset spring 6 to promote to overlap on the post 44, second reset spring 6 is in first step face d with between the second step face e, so set up, through second reset spring 6's effect, make after the regulation is accomplished promote reseing of post 44, the regulation of next time of being convenient for.

In order to drive the pushing column 44 to move back and forth, referring to fig. 2, 8 and 9, a driving lever 211 is disposed on the wire drawing 21, the driving lever 211 extends up and down, the rotation driving mechanism further includes an adjusting push rod 46 and a swing rod 47, the adjusting push rod 46 extends back and forth, an adjusting groove 461 extending back and forth is disposed in the middle of the adjusting push rod 46, the swing rod 47 extends left and right, the middle of the swing rod 47 is rotatably mounted on the inner wall of the mounting cavity 11, the left end of the swing rod 47 is hinged to one end of the adjusting push rod 46, the right end of the swing rod 47 is hinged to the other end of the pushing column 44, wherein the driving lever 211 is movably mounted in the adjusting groove 461, so that when the wire drawing 21 is braked, the wire drawing 21 drives the driving lever 211 to move, in the braking working stroke of the wire drawing 21, the driving shift lever 211 moves in the adjusting groove 461, the swing link 47 is inactive, when the wire drawing 21 exceeds the braking working stroke, the driving shift lever 211 moves to abut against one end of the adjusting groove 461, which is far away from the adjusting sleeve 41, the driving shift lever 211 continues to move to pull the adjusting push rod 46 to move, the adjusting push rod 46 pulls the left end of the swing link 47 to move towards one end, which is far away from the adjusting sleeve 41, of the swing link 47 moves towards the right end, which is close to the adjusting sleeve 41, of the swing link 47, and the push column 44 is pushed to move until the pushing end b abuts against the abutting end a of the shift column 4321.

Referring to fig. 10, a long connecting groove 471 extending left and right is formed in the right end of the swing rod 47, a connecting shaft 7 extending up and down is formed in one end, hinged to the swing rod 47, of the push column 44, and the connecting shaft 7 is arranged in the long connecting groove 471.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A parking brake wire drawing mechanism, comprising:

2. The parking brake wire drawing mechanism according to claim 1, wherein one end of the adjusting wire drawing sheath, which is mounted in the mounting cavity, is a mating end, and an external thread is arranged on the outer wall surface of the mating end;

the adjustment assembly includes:

3. The parking brake wire drawing mechanism according to claim 2, wherein the rotation stopping structure includes a rotation stopping post and a rotation stopping surface, an end surface of the rotation stopping post is abutted against the rotation stopping surface, one of the rotation stopping post and the rotation stopping surface is provided at the mating end, and the other is provided at the housing.

4. The parking brake pull mechanism of claim 2, wherein the rotational drive mechanism comprises:

wherein, the other end of the pawl is arranged on the toggle column.

5. The parking brake pull mechanism of claim 4, wherein one end of the pull post is an abutting end;

the rotation drive mechanism further includes:

6. The parking brake wire drawing mechanism according to claim 5, wherein the toggle column has a connecting end opposite to the abutting end, and a first return spring is arranged between the connecting end and the inner wall of the mounting cavity.

7. The parking brake wire drawing mechanism according to claim 5, wherein the toggle column has a connecting end opposite to the abutting end, the toggle column is disposed in an inclined manner, and the toggle column is disposed gradually away from the adjusting sleeve in a direction from the connecting end toward the abutting end.

8. The parking brake wire drawing mechanism according to claim 5, wherein the housing is provided with a mounting hole corresponding to the push post, the mounting hole being stepped in the front-rear direction to form a first stepped surface disposed toward the toggle post;

9. The parking brake wire drawing mechanism according to claim 5, wherein a driving lever is arranged on the wire drawing, and the driving lever extends up and down;

the rotation drive mechanism further includes:

wherein, the driving deflector rod is movably arranged in the adjusting groove.

10. The parking brake wire drawing mechanism according to claim 9, wherein the right end of the swing lever is provided with an elongated connecting groove extending in the left-right direction;