CN209856283U - Self-adjusting clearance mechanism of bidirectional double-collar shoe brake - Google Patents
Self-adjusting clearance mechanism of bidirectional double-collar shoe brake Download PDFInfo
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- CN209856283U CN209856283U CN201920173773.8U CN201920173773U CN209856283U CN 209856283 U CN209856283 U CN 209856283U CN 201920173773 U CN201920173773 U CN 201920173773U CN 209856283 U CN209856283 U CN 209856283U
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Abstract
The utility model discloses a clearance mechanism is transferred from accent of two-way two leading hoof formula stopper. One end of the wheel cylinder body is provided with a piston assembly and a gap adjusting ratchet tooth assembly which are coaxially installed, the gap adjusting ratchet tooth assembly is connected with the second collar shoe assembly through a gap adjusting screw rod, one end of a gap adjusting shifting plate is movably connected to the piston assembly, the other end of the gap adjusting shifting plate is provided with a shifting tooth plate protruding towards the gap adjusting ratchet tooth assembly, and the shifting tooth plate is in contact connection with the gap adjusting ratchet tooth assembly; one end of the spring is hooked on the gap adjusting shifting plate, the other end of the spring is hooked on the piston assembly, a pin hole is formed in the horizontal end face of the gap adjusting shifting plate, a gap adjusting shaft pin penetrates through the pin hole to be vertically and fixedly installed on the wheel cylinder body, the middle of the gap adjusting shifting plate is connected with the top end of a push rod, and the push rod penetrates through a push rod fixing plate fixed on the wheel cylinder body and moves in the vertical direction perpendicular to the gap adjusting shifting plate. The utility model overcomes brake shoe friction disc and brake drum locking can't disassemble the shortcoming under the particular case, have reduced the warranty work load, overcome the shortcoming of artifical regulation.
Description
Technical Field
The utility model relates to a two-way two lead shoes formula car hydraulic brake clearance guiding mechanism, concretely relates to two-way two lead shoes formula stopper from clearance adjustment mechanism.
Background
With the development of the automobile industry, almost every family is equipped with an automobile, the existing bidirectional leading shoe type automobile hydraulic brake adjusts the gap distance between a friction plate on a shoe and a brake drum to reach a certain set value by manually shifting a ratchet wheel, and the brake needs to be maintained and maintained frequently due to large abrasion between the friction plate and the brake drum, and the adjustment of the gap of the bidirectional self-boosting automobile brake is an important project in automobile repair operation, so that the adjustment work is heavy, and the labor intensity is high.
SUMMERY OF THE UTILITY MODEL
In order to reduce the maintenance workload and overcome the defect of manual adjustment, the utility model provides a clearance self-adjusting mechanism of a bidirectional double-collar shoe brake.
The technical scheme of the utility model as follows:
the utility model discloses a wheel cylinder body, first neck hoof assembly, second neck hoof assembly, the one end of wheel cylinder body is passed through the piston and is connected with first neck hoof assembly, and the one end of wheel cylinder body is equipped with coaxial arrangement's piston assembly and transfers clearance ratchet tooth subassembly, transfers clearance ratchet tooth subassembly to be connected with second neck hoof assembly through transferring the clearance screw rod, carries out clearance adjustment through self-adjusting clearance mechanism between first neck hoof assembly and the second neck hoof assembly.
The self-gap-adjusting mechanism mainly comprises a gap-adjusting shifting plate, a spring and a push rod, wherein the gap-adjusting shifting plate is horizontally arranged at the top of a cylinder body of a wheel cylinder, one end of the gap-adjusting shifting plate is movably connected to a piston assembly, the other end of the gap-adjusting shifting plate is provided with a shifting tooth plate protruding towards a gap-adjusting ratchet tooth assembly, and the shifting tooth plate is in contact connection with a ratchet of the gap-adjusting ratchet tooth assembly; the clearance adjusting shifting plate shifts the ratchets of the clearance adjusting ratchet tooth assembly to drive the clearance adjusting ratchet tooth assembly to rotate, so that the clearance adjusting ratchet tooth assembly moves along the axial direction.
One end of the spring is hooked on the end, not the shifting gear plate, of the gap adjusting shifting plate, so that the shifting gear plate of the gap adjusting shifting plate is always pressed on the gap adjusting ratchet gear assembly, the other end of the spring is hooked on the piston assembly, a pin hole is formed in the horizontal end face of the gap adjusting shifting plate, a gap adjusting pin penetrates through the pin hole of the gap adjusting shifting plate to install the gap adjusting shifting plate in an opening in the top face of the wheel cylinder body, and the gap adjusting shifting plate rotates around the gap adjusting pin under the action of the spring;
the middle part of the gap adjusting shifting plate extends outwards along the length direction perpendicular to the gap adjusting shifting plate to form a lug structure, the top end of the ejector rod is in contact with the lug structure, the ejector rod is perpendicular to the gap adjusting shifting plate, an ejector rod fixing plate is fixed on the surface of one side of the wheel cylinder body, and the ejector rod penetrates through the ejector rod fixing plate and moves along the vertical direction perpendicular to the gap adjusting shifting plate. The ejector rod moves vertically upwards to enable the clearance adjusting shifting plate to be separated from the clearance adjusting ratchet tooth assembly.
The self-adjusting clearance mechanism realizes self-adjusting clearance through the distance change caused by the rotation of the clearance adjusting ratchet tooth component and the axial movement of the piston which are stirred by the clearance adjusting shifting plate.
Preferably, the clearance adjusting shifting plate is an approximately L-shaped flat plate, a shifting tooth plate is arranged at the straight end of the L-shaped flat plate, the shifting tooth plate is bent towards the direction close to the clearance adjusting ratchet tooth assembly, so that the outermost side of the shifting tooth plate is embedded into a tooth groove of the clearance adjusting ratchet tooth assembly, and a clamping concave block which is matched and connected with the piston assembly is machined at the bent end of the L-shaped flat plate.
Preferably, the piston assembly includes spring coupling portion and with be used for transferring the clearance and dial the joint board of board joint, the end is hung as colluding of spring to spring coupling portion trompil, the joint board processing have with transfer the clearance dial the concave piece cooperation of joint that the board used block concave recess, spring coupling portion links into an integrated entity with the joint board.
Preferably, the ejector rod fixing plate is of a U-shaped structure, coaxial through holes are formed in two ends of the U-shaped structure, and the ejector rod penetrates through the two through holes of the U-shaped structure in sequence vertically to be connected with a lug structure of the gap adjusting shifting plate.
Preferably, the gap-adjusting shaft pin is axially fixed by a hollow pin seat radially mounted on the wheel cylinder body.
The utility model has the advantages as follows:
the utility model completes the gap adjustment of the hoof by the gap adjusting and shifting plate and gear shifting mechanism; meanwhile, the gap-adjusting ratchet wheel tooth assembly (which is reversely shifted from the normal self-adjusting shifting teeth) is manually shifted by pushing the push rod, the working outer diameter of the brake friction plate is reduced, the brake shoe is separated from the brake drum, the defect that the brake shoe friction plate and the brake drum are locked and cannot be disassembled under a specific condition is overcome, the maintenance workload is reduced, and the defect of manual adjustment is overcome.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a right side view of the present invention;
fig. 3 is a bottom view of the present invention;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
fig. 5 is a top view of the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
fig. 7 is an assembly view of the present invention;
fig. 8 is a first isometric view of the present invention;
fig. 9 is a second isometric view of the present invention.
In the figure: 1. the gap adjusting device comprises a gap adjusting screw rod, 2 a gap adjusting ratchet tooth component, 3 a gap adjusting shifting plate, 4 a spring, 5 a push rod, 6 a push rod fixing plate, 7 a gap adjusting shaft pin, 8 a copper joint, 9 a dust plug, 10 an air discharging screw, 11 an air screw dust cover, 12 a wheel cylinder body, 13 a spring gasket, 14 a screw, 15 a piston, 16 a leather cup, 17 a gap adjusting gasket, 18 a protective cover, 19 a piston component, 20 a second leading hoof assembly and 21 a first leading hoof assembly.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 3 and 4, a copper joint 8 is arranged at an oil inlet at the bottom of the wheel cylinder body 12, the oil inlet is sealed by a dust plug 9, an air bleeding screw 10 is installed at the bottom of the wheel cylinder body 12, and the air bleeding screw 10 is sealed in a dust-proof manner through an air bleeding screw dust cover 11.
As shown in fig. 6 and 7, one end of the wheel cylinder 12 is connected with the first leading shoe assembly 21 through the piston 15, one end of the wheel cylinder 12 is provided with a piston assembly 19 and a gap-adjusting ratchet tooth assembly 2 which are coaxially mounted, the gap-adjusting ratchet tooth assembly 2 is sleeved in the piston assembly 19 through a gap-adjusting gasket 17, the gap-adjusting ratchet tooth assembly 2 is connected with the second leading shoe assembly 20 through a gap-adjusting screw 1, and the gap between the first leading shoe assembly 21 and the second leading shoe assembly 20 is adjusted through a self-gap-adjusting mechanism.
Furthermore, the two end surfaces of the piston assembly 19 and the piston 15 close to each other are respectively sleeved with a leather cup 16, the piston assembly 19 and the piston 15 can reciprocate in the wheel cylinder, the two end surfaces of the piston assembly 19 and the piston 15 far away from each other are respectively provided with a protective cover 18, and the protective covers 18 are clamped with the wheel cylinder body 12.
As shown in fig. 1 and 2, the self-gap-adjusting mechanism mainly comprises a gap-adjusting shifting plate 3, a spring 4 and a push rod 5, wherein the gap-adjusting shifting plate 3 is horizontally installed at the top of a wheel cylinder body 12, one end of the gap-adjusting shifting plate 3 is movably connected to a piston assembly 19, the other end of the gap-adjusting shifting plate 3 is provided with a shifting tooth plate protruding towards the gap-adjusting ratchet tooth assembly 2, and the shifting tooth plate is in contact connection with the gap-adjusting ratchet tooth assembly 2; the clearance adjusting shifting plate 3 shifts the teeth of the clearance adjusting ratchet tooth assembly 2 to drive the clearance adjusting ratchet tooth assembly 2 to rotate, so that the clearance adjusting ratchet tooth assembly 2 moves along the axial direction.
The middle part of the gap adjusting shifting plate 3 extends outwards along the direction perpendicular to the length direction of the gap adjusting shifting plate to form a lug structure, the top end of the ejector rod 5 is in contact with the lug structure, the ejector rod 5 is perpendicular to the gap adjusting shifting plate 3, an ejector rod fixing plate 5 is fixed on the surface of one side of the wheel cylinder body 12 through a screw 14 and a spring gasket 13, and the ejector rod 5 penetrates through the ejector rod fixing plate 5 and moves along the vertical direction perpendicular to the gap adjusting shifting plate 3. The mandril 5 moves vertically upwards to enable the gap adjusting dial plate 3 to be separated from the contact with the gap adjusting ratchet tooth assembly 2.
As shown in fig. 5 and 8, one end of the spring 4 is hooked on the end of the non-shifting gear plate of the gap adjusting shifting plate 3, so that the shifting gear plate of the gap adjusting shifting plate 3 is always pressed on the gap adjusting ratchet gear assembly 2, the other end of the spring 4 is hooked on the piston assembly 19, a pin hole is formed in the horizontal end face of the gap adjusting shifting plate 3, the gap adjusting pin 7 penetrates through the pin hole of the gap adjusting shifting plate 3 to install the gap adjusting shifting plate 3 in the hole in the top face of the wheel cylinder body 12, and the gap adjusting shifting plate 3 rotates around the gap adjusting pin 7 under the action of the spring 4.
The gap-adjusting shaft pin 7 is axially fixed through a hollow pin boss radially arranged on the wheel cylinder body 12.
As shown in fig. 5 or 8, the gap-adjusting shifting plate 3 is an approximately L-shaped flat plate, a shifting tooth plate is arranged at the straight end of the L-shaped flat plate, the shifting tooth plate is bent towards the direction close to the gap-adjusting ratchet tooth assembly 2, so that the outermost side of the shifting tooth plate is embedded into the tooth groove of the gap-adjusting ratchet tooth assembly 2, and a clamping concave block used for being connected with the piston assembly 19 in a matched manner is processed at the bent end of the L-shaped flat plate.
As shown in fig. 9, the piston assembly 19 includes a spring connecting portion and a clamping plate for adjusting the gap and shifting the plate 3, the hole of the spring connecting portion is used as a hooking end of the spring 4, the clamping plate is processed with a clamping concave portion matched with a clamping concave block for adjusting the gap and shifting the plate 3, and the spring connecting portion and the clamping plate are connected into a whole.
As shown in fig. 8, the ejector rod fixing plate 5 is a U-shaped structure, coaxial through holes are formed at two ends of the U-shaped structure, and the ejector rod 5 sequentially vertically penetrates through the two through holes of the U-shaped structure to be connected with the lug structure of the gap adjusting shifting plate 3.
The self-gap adjusting mechanism realizes self-gap adjustment by shifting the distance change driven by the rotation of the gap adjusting ratchet tooth component 2 and the axial movement of the piston through the gap adjusting shifting plate 3; meanwhile, the gap-adjusting ratchet tooth assembly (which is reversely set with the normal self-adjusting set tooth) is manually set by pushing the push rod.
The utility model discloses a brake shoe friction disc reaches certain clearance value with the brake drum clearance, dials the tooth mechanism through dialling the board and accomplishes the shoe drum clearance, and concrete working process is as follows:
in the braking process, when the piston 15 is filled into the wheel cylinder body 12, the piston preferentially moves to enable the first leading shoe assembly 21 to be attached to a brake drum, hydraulic pressure is continuously injected to push the piston assembly 19 to move reversely together with the gap adjusting screw rod 1 until the second leading shoe assembly 20 is attached to the brake drum, the piston assembly 19 drives the gap adjusting ratchet assembly 2 to move outwards together with the gap adjusting bolt 1 when moving, the gap adjusting shifting plate 3 rotates around the center of the gap adjusting shaft pin 7 by overcoming the tension of the spring 4, when the rotating amplitude (namely the displacement of the gap adjusting plate) of the tooth shifting plate on the left side of the gap adjusting shifting plate 3 driven by the outward movement amount of the piston assembly 19 is larger than the distance of 1 tooth of the ratchet wheel rotation, the gap adjusting shifting plate 3 shifts 1 tooth of the gap adjusting ratchet tooth assembly 2, and the distance of the gap adjusting bolt which is outwards spread is 0.02 mm.
After the brake is released, the first leading shoe assembly 21, the second leading shoe assembly 21 and the piston return to the original position, and the gap adjusting dial plate 3 returns to the original position under the thrust of the piston assembly 19.
The utility model discloses improve the part and still lie in: aiming at the situation that under a specific condition, a brake shoe friction plate and a brake drum are locked due to too small clearance and cannot be disassembled, an upward jacking force can be applied to the ejector rod 5, so that the ejector rod 5 pushes the clearance adjusting shifting plate 3 to be separated from the outer circle of the gear ring of the clearance adjusting ratchet gear component 2, and meanwhile, the gear is reversely shifted, so that the clearance adjusting screw rod 1 rotates and retracts 0.02mm inwards until the brake shoe friction plate and the brake drum are completely separated and disassembled. The self-adjusting mechanism increases the technical effect of manually adjusting the outer diameter of the brake after the brake shoe and the brake drum are locked due to too small clearance, so that the brake shoe friction plate is separated from the brake drum.
The above-mentioned embodiment is right the utility model discloses a further explanation, it is not right the utility model discloses a specifically limited, it is any right the structure after the simple transform all belongs to the utility model discloses a protection scope.
Claims (5)
1. The utility model provides a two-way two leading hoof formula stopper from clearance adjustment mechanism, includes wheel cylinder body (12), first leading hoof assembly (21) and second leading hoof assembly (20), its characterized in that: one end of a wheel cylinder body (12) is connected with a first leading shoe assembly (21) through a piston (15), one end of the wheel cylinder body (12) is provided with a piston assembly (19) and a gap adjusting ratchet tooth assembly (2) which are coaxially installed, the gap adjusting ratchet tooth assembly (2) is connected with a second leading shoe assembly (20) through a gap adjusting screw rod (1), and the gap between the first leading shoe assembly (21) and the second leading shoe assembly (20) is adjusted through a self-gap adjusting mechanism;
the self-gap-adjusting mechanism mainly comprises a gap-adjusting shifting plate (3), a spring (4) and a push rod (5), the gap-adjusting shifting plate (3) is horizontally arranged at the top of a wheel cylinder body (12), one end of the gap-adjusting shifting plate (3) is movably connected to a piston assembly (19), a shifting tooth plate protruding towards a gap-adjusting ratchet tooth assembly (2) is arranged at the other end of the gap-adjusting shifting plate (3), and the shifting tooth plate is in contact connection with a ratchet on the gap-adjusting ratchet tooth assembly (2); one end of the spring (4) is hooked at the end of a non-shifting gear plate of the gap adjusting shifting plate (3), so that the shifting gear plate of the gap adjusting shifting plate (3) is always pressed on the gap adjusting ratchet gear component (2), the other end of the spring (4) is hooked on the piston component (19), the gap adjusting shifting plate (3) is provided with a pin hole, a gap adjusting pin shaft (7) penetrates through the pin hole of the gap adjusting shifting plate (3) to install the gap adjusting shifting plate (3) in an opening on the top surface of the wheel cylinder body (12), and the gap adjusting shifting plate (3) rotates around the gap adjusting pin shaft (7) under the action of the spring (4); transfer the clearance and dial the outside lug structure that forms that extends of middle part of board (3) along perpendicular to self length direction, the top and the lug structure contact of ejector pin (5), ejector pin (5) perpendicular to transfer the clearance and dial board (3) setting, be fixed with ejector pin fixed plate (6) on the surface of wheel cylinder body (12) one side, ejector pin (5) pass ejector pin fixed plate (6) and transfer the vertical direction removal of board (3) along the perpendicular to.
2. The backlash adjustment mechanism of a two-way double-lead shoe brake according to claim 1, wherein:
the clearance adjusting shifting plate (3) is an approximately L-shaped flat plate, a shifting tooth plate is arranged at the straight end of the L-shaped flat plate, the shifting tooth plate is bent towards the direction close to the clearance adjusting ratchet tooth assembly (2) to enable the outermost side of the shifting tooth plate to be embedded into a tooth groove of the clearance adjusting ratchet tooth assembly (2), and a clamping concave block which is used for being connected with the piston assembly (19) in a matched mode is machined at the bent end of the L-shaped flat plate.
3. The backlash adjustment mechanism of a two-way double-lead shoe brake according to claim 1, wherein: piston assembly (19) include spring coupling portion and with be used for transferring the clearance to dial the joint board of board (3) joint, the end is hung as colluding of spring (4) to spring coupling portion trompil, the joint board processing has and transfers the clearance to dial the block concave part that the cooperation of the concave piece of joint of board (3) was used, spring coupling portion links into an integrated entity with the joint board.
4. The backlash adjustment mechanism of a two-way double-lead shoe brake according to claim 1, wherein: the ejector rod fixing plate (6) is of a U-shaped structure, coaxial through holes are formed in the two ends of the U-shaped structure, and the ejector rod (5) sequentially vertically penetrates through the two through holes of the U-shaped structure to be connected with a lug structure of the gap adjusting shifting plate (3).
5. The backlash adjustment mechanism of a two-way double-lead shoe brake according to claim 1, wherein: the gap-adjusting shaft pin (7) is axially fixed through a hollow pin boss radially arranged on the wheel cylinder body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920173773.8U CN209856283U (en) | 2019-01-31 | 2019-01-31 | Self-adjusting clearance mechanism of bidirectional double-collar shoe brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920173773.8U CN209856283U (en) | 2019-01-31 | 2019-01-31 | Self-adjusting clearance mechanism of bidirectional double-collar shoe brake |
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| Publication Number | Publication Date |
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| CN209856283U true CN209856283U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920173773.8U Active CN209856283U (en) | 2019-01-31 | 2019-01-31 | Self-adjusting clearance mechanism of bidirectional double-collar shoe brake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076266A (en) * | 2022-06-06 | 2022-09-20 | 南方天合底盘系统有限公司 | Automobile drum brake and clearance calculation method thereof |
-
2019
- 2019-01-31 CN CN201920173773.8U patent/CN209856283U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076266A (en) * | 2022-06-06 | 2022-09-20 | 南方天合底盘系统有限公司 | Automobile drum brake and clearance calculation method thereof |
| CN115076266B (en) * | 2022-06-06 | 2024-01-30 | 南方天合底盘系统有限公司 | Automobile drum brake and clearance calculation method thereof |
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