CN109488705B - Improved generation brake shoe - Google Patents
Improved generation brake shoe Download PDFInfo
- Publication number
- CN109488705B CN109488705B CN201811479327.6A CN201811479327A CN109488705B CN 109488705 B CN109488705 B CN 109488705B CN 201811479327 A CN201811479327 A CN 201811479327A CN 109488705 B CN109488705 B CN 109488705B
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- Prior art keywords
- brake
- brake shoe
- cam
- shoe
- friction
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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
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/10—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes
- F16D51/12—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes mechanically actuated
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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
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
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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
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
- F16D2125/28—Cams; Levers with cams
- F16D2125/30—Cams; Levers with cams acting on two or more cam followers, e.g. S-cams
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an improved brake shoe in the technical field of locomotive braking, which comprises a brake drum, a brake shoe and a brake chassis, the brake drum is arranged on the periphery of the brake shoe, the brake shoe comprises a first brake shoe and a second brake shoe, the first brake shoe and the second brake shoe are symmetrically arranged on the brake chassis in a sliding manner, the first cam is arranged between the top of the first brake shoe and the top of the second brake shoe, the integral parallel motion of the brake shoes is realized through two groups of cam mechanisms, so that the friction surfaces of all areas of the friction plate are synchronously contacted with the brake drum, the brake is uniform, the friction effect is good, the service life of the friction plate is prolonged, the ratchet-type tentacles can serve as reinforcing plates and can be connected with the sliding blocks to realize the parallel sliding of the brake shoes, through the triangular groove arranged on the friction plate, brake reaction delay caused by friction debris stuck on the brake drum can be effectively avoided.
Description
Technical Field
The invention relates to the technical field of locomotive braking, in particular to an improved brake shoe.
Background
A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is a mechanical component that stops or decelerates a moving member in a machine, and is commonly referred to as a brake or a gate. The brake mainly comprises a braking frame, a braking piece, an operating device and the like. Some brakes are also equipped with automatic adjustment of the braking clearance, which is usually mounted on the high-speed shaft of the equipment in order to reduce the braking torque and the structural size, but large equipment with high safety requirements should be mounted on the low-speed shaft close to the working part of the equipment.
The general principle of operation of a brake system is to prevent the wheel from rotating or tending to rotate by utilizing the mutual friction between a non-rotating element connected to the vehicle body (or frame) and a rotating element connected to the wheel (or transmission shaft), and a brake generally applies a braking torque to the rotating element through a fixed element therein, so that the rotational angular velocity of the latter is reduced, and at the same time, by virtue of the adhesion of the wheel to the ground, a braking force of the road surface to the wheel is generated to decelerate the vehicle. Brakes that generate braking torque by friction between a stationary member and a working surface of a rotating member are all friction brakes. Among the vehicle brakes, one brake employs a shoe-expanding drum brake, and the shoe-expanding drum brake is mainly classified into two types: one is mechanical, and the most common application is the shoe opening of a pneumatic cam mechanism; the other type is hydraulic type: it uses hydraulic cylinder to push piston to open shoe. The cam expands the shoe to push the two ends of the brake shoe to have equal strokes, so that the brake shoe rotates along the supporting point under the action of the other end of the brake shoe which is rotatably connected with the supporting shaft, and a brake sheet on the brake shoe is rubbed with the brake drum, so that the vehicle is braked. The present invention contemplates an improved brake shoe to solve the above problems.
Disclosure of Invention
The invention aims to provide an improved brake shoe, which solves the problems that in the brake of the shoe-expanding mechanism in the background art, one end of the brake shoe is firstly expanded under the action of a pneumatic cam mechanism, so that a brake sheet close to the end is firstly rubbed with a brake drum, and the abrasion of a brake friction sheet is not uniform under the long-term action, so that the brake effect of the brake is poor, the replacement period of the friction sheet is short, the maintenance cost of the brake is greatly increased, and the problems are particularly obvious for large vehicles.
In order to achieve the purpose, the invention provides the following technical scheme: the improved brake shoe comprises a brake drum, a brake shoe and a brake chassis, wherein the brake drum is arranged on the periphery of the brake shoe, the brake shoe comprises a first brake shoe and a second brake shoe, the first brake shoe and the second brake shoe are symmetrically arranged on the brake chassis in a sliding mode, a first cam is arranged between the top of the first brake shoe and the top of the second brake shoe, a second cam is arranged between the bottom of the first brake shoe and the bottom of the second brake shoe, the first cam and the second cam are arranged on the brake chassis, the first cam and the second cam can drive the first brake shoe and the second brake shoe to be opened and closed, the first brake shoe and the second brake shoe are enabled to be in fit friction action with the inner wall of the brake drum, mounting plates are arranged on the first brake shoe and the second brake shoe, and friction plates are arranged on the mounting plates.
Preferably, the brake chassis comprises a disc body, sliding grooves are symmetrically formed in the disc body in the vertical direction, sliding blocks are symmetrically clamped in the sliding grooves in the horizontal direction in a sliding mode, and a return spring is arranged between the sliding blocks.
Preferably, a threaded hole is formed in the sliding block, and the sliding block and the sliding groove are lubricated.
Preferably, the first brake shoe and the second brake shoe are symmetrically provided with four groups of ratchet type tentacles, and each group of ratchet type tentacles is fixedly connected with the sliding block through screws.
Preferably, the first cam and the second cam are symmetrically arranged, and the first cam and the second cam act on the brake shoe connected with the first cam and the second cam synchronously through an external driving device.
Preferably, the friction plate is provided with a triangular groove.
Compared with the prior art, the invention has the beneficial effects that: the brake shoe parallel motion is realized by the two groups of cam mechanisms, so that the friction surfaces of all areas of the friction plate are synchronously contacted with the brake drum, the brake is uniform, the friction effect is good, the service life of the friction plate is prolonged, the ratchet-shaped feeler can serve as a reinforcing plate and can be connected with the sliding block to realize the parallel sliding of the brake shoe, and the brake reaction delay caused by friction debris stuck on the brake drum can be effectively avoided by the triangular grooves arranged on the friction plate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a brake spider according to the present invention;
FIG. 3 is a schematic view of a brake shoe according to the present invention;
FIG. 4 is a view of the plane A-A of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-brake drum, 2-brake shoe, 201-first brake shoe, 202-second brake shoe, 203-ratchet type tentacle, 3-brake chassis, 301-disc body, 3031-threaded hole, 302-sliding groove, 303-sliding block, 304-return spring, 4-mounting plate, 5-friction plate, 51-trapezoidal groove, 6-cam I and 7-cam II.
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.
Referring to fig. 1-4, the present invention provides a technical solution: an improved brake shoe comprises a brake drum 1, the brake drum comprises brake shoes 2 and a brake chassis 3, the brake drum 1 is arranged on the periphery of the brake shoes 2, the brake shoes 2 comprise first brake shoes 201 and second brake shoes 202, the first brake shoes 201 and the second brake shoes 202 are symmetrically arranged on the brake chassis 3 in a sliding mode, a first cam 6 is arranged between the tops of the first brake shoes 201 and the tops of the second brake shoes 202, a second cam 7 is arranged between the bottoms of the first brake shoes 201 and the bottoms of the second brake shoes 202, the first cam 6 and the second cam 7 are arranged on the brake chassis 3, the first cam 6 and the second cam 7 can drive the first brake shoes 201 and the second brake shoes 202 to be opened and closed, the first brake shoes 201 and the second brake shoes 202 are enabled to be in fit friction action with the inner wall of the brake drum 1, mounting plates 4 are arranged on the first brake shoes 201 and the second brake shoes 202, and friction plates 5 are arranged on the mounting plates 4.
Wherein, the brake chassis 3 includes the disk body 301, the disk body 301 has the sliding chute 302 up and down symmetrically, the sliding chute 302 is equipped with the slide block 303 from left to right symmetrically, there is the reset spring 304 between the slide blocks 303, the structure has the function of realizing the automatic reset of the brake shoe, there are screwed holes 3031 on the slide block 303, used for building in the thorn type tentacle 203, the slide block 303 and the sliding chute 302 are lubricated, reduce the friction, facilitate the slip, there are four groups of thorn type tentacles 203 on the first brake shoe 201 and the second brake shoe 202 symmetrically, each group thorn type tentacle 203 fastens the connecting slide block 303 through the screw and sets up the structure and can both replace the reinforcement plate, can connect the slide block, realize the stable slip of the brake shoe, the cam one 6 and the cam two 7 are symmetrically set up, the cam one 6 and the cam two 7 act on the brake shoe 2 connected with it synchronously through the external drive unit, have the function of making the brake shoe act on the brake, the friction plate 5 is provided with a trapezoidal groove 51, so that debris generated by friction can be pressed into the groove, and the problem of brake reaction delay caused by the friction debris stuck on a brake drum is avoided.
One specific application of this embodiment is: the device is an improved brake shoe, which is mainly suitable for locomotive braking, when an automobile is braked, a brake is stepped by feet, a brake mechanism controls a cam I6 and a cam II 7 to synchronously rotate, the cam I6 and the cam II 7 which synchronously rotate provide force for pushing a first brake shoe 201 and a second brake shoe 202 to move, the first brake shoe 201 and the second brake shoe 202 are stressed to approach a brake drum 1 until a friction plate 5 is attached to the inner wall of the brake drum 1, in the process, a reset spring 304 is stretched outwards under the tension force and stores energy, a slide block 303 slides outwards along a slide rail 302, the friction plate 5 is attached to the inner wall of the brake drum 1 to generate friction resistance, the friction resistance enables the brake drum 1 to decelerate, the locomotive starts to decelerate braking, when the brake is not required, a driver releases the brake, the cam mechanism returns to the original position, meanwhile, the reset spring 304 provides force for retracting the slide block 303, the slide block 303 drives brake shoes at two, friction disc 5 breaks away from brake drum 1, and frictional resistance disappears, and the locomotive braking is ended, and the thorn type tentacle of this device design can also act as the reinforcing plate of brake shoe simultaneously for the brake shoe structure is more firm, sets up triangle-shaped recess 51 on friction disc 5 and can compress tightly the notch mouth with the piece that the friction produced under the pressure effect in, avoids the sticky problem that arouses brake reaction lag with the piece on the brake drum 1.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The improved brake shoe comprises a brake drum (1), a brake shoe (2) and a brake chassis (3), and is characterized in that: the brake drum (1) is arranged at the periphery of a brake shoe (2), the brake shoe (2) comprises a first brake shoe (201) and a second brake shoe (202), the first brake shoe (201) and the second brake shoe (202) are symmetrically arranged on a brake chassis (3) in a sliding mode, a first cam (6) is arranged between the top of the first brake shoe (201) and the top of the second brake shoe (202), a second cam (7) is arranged between the bottom of the first brake shoe (201) and the bottom of the second brake shoe (202), the first cam (6) and the second cam (7) are arranged on the brake chassis (3), the first cam (6) and the second cam (7) can drive the first brake shoe (201) and the second brake shoe (202) to be opened and closed, the first brake shoe (201) and the second brake shoe (202) are enabled to be attached to the inner wall of the brake drum (1) in a friction action, and mounting plates (4) are arranged on the first brake shoe (201) and the second brake shoe (202), all be provided with friction disc (5) on installation piece (4), brake chassis (3) are including disk body (301), disk body (301) longitudinal symmetry is provided with spout (302), bilateral symmetry slip joint has slider (303) in spout (302), be provided with reset spring (304) between slider (303), equal symmetry is provided with spine type tentacle (203) on first brake shoe (201) and second brake shoe (202), spine type tentacle (203) have four groups, and every spine type tentacle (203) of group passes through screw fastening connection slider (303), be provided with triangle-shaped recess (51) on friction disc (5).
2. An improved brake shoe according to claim 1 wherein: the sliding block (303) is provided with a threaded hole (3031), and the sliding block (303) and the sliding groove (302) are lubricated.
3. An improved brake shoe according to claim 1 wherein: the first cam (6) and the second cam (7) are symmetrically arranged, and the first cam (6) and the second cam (7) synchronously act on the brake shoe (2) connected with the first cam through an external driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811479327.6A CN109488705B (en) | 2018-12-05 | 2018-12-05 | Improved generation brake shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811479327.6A CN109488705B (en) | 2018-12-05 | 2018-12-05 | Improved generation brake shoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109488705A CN109488705A (en) | 2019-03-19 |
| CN109488705B true CN109488705B (en) | 2020-09-25 |
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ID=65699205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811479327.6A Active CN109488705B (en) | 2018-12-05 | 2018-12-05 | Improved generation brake shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109488705B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966325B (en) * | 2019-11-27 | 2021-06-18 | 无锡翼友机车科技有限公司 | Electric bicycle and electric motorcycle drum brake structure with surface contact brake |
| CN112268087A (en) * | 2020-10-30 | 2021-01-26 | 宋伟 | But drum brake automatically regulated braking clearance device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5718828A (en) * | 1980-07-09 | 1982-01-30 | Akebono Brake Ind Co Ltd | Brake shoe gap automatic adjusting device for drum brake |
| CN2284313Y (en) * | 1996-09-23 | 1998-06-17 | 代振伟 | Dual-cam promoting fully-floating balance brake |
| CN2680926Y (en) * | 2004-03-10 | 2005-02-23 | 梁育红 | Floating type adjustment-free automobile brake |
| CN2755348Y (en) * | 2004-11-21 | 2006-02-01 | 重庆宗申技术开发研究有限公司 | Double collar brake for motorcycle |
| CN203009641U (en) * | 2012-11-28 | 2013-06-19 | 吉林大华机械制造有限公司 | Dual-shoe drum brake |
| CN107975548A (en) * | 2017-11-28 | 2018-05-01 | 宋建毅 | A kind of block formula for oversize vehicle is braked |
-
2018
- 2018-12-05 CN CN201811479327.6A patent/CN109488705B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5718828A (en) * | 1980-07-09 | 1982-01-30 | Akebono Brake Ind Co Ltd | Brake shoe gap automatic adjusting device for drum brake |
| CN2284313Y (en) * | 1996-09-23 | 1998-06-17 | 代振伟 | Dual-cam promoting fully-floating balance brake |
| CN2680926Y (en) * | 2004-03-10 | 2005-02-23 | 梁育红 | Floating type adjustment-free automobile brake |
| CN2755348Y (en) * | 2004-11-21 | 2006-02-01 | 重庆宗申技术开发研究有限公司 | Double collar brake for motorcycle |
| CN203009641U (en) * | 2012-11-28 | 2013-06-19 | 吉林大华机械制造有限公司 | Dual-shoe drum brake |
| CN107975548A (en) * | 2017-11-28 | 2018-05-01 | 宋建毅 | A kind of block formula for oversize vehicle is braked |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109488705A (en) | 2019-03-19 |
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