阅读说明：本技术 方便闸瓦更换的闸瓦固定结构 (Brake shoe fixing structure convenient for brake shoe replacement ) 是由 刘书学 于 2021-07-16 设计创作，主要内容包括：一种方便闸瓦更换的闸瓦固定结构,包括安装在闸瓦托上的闸瓦和设置在闸瓦、闸瓦托上的闸钎穿孔,在闸瓦托上设有闸瓦锁定与释放机构；闸瓦锁定与释放机构包括经第一销轴铰连接在闸瓦托上部的手柄,手柄经第二销轴与由一对弧形板组成的连杆上端铰连接,连杆的下端经第三销轴与闸瓦锁销的上端铰连接,在闸瓦锁销的上端设有挂钩体,连杆上设有装配紧固螺母的横穿挡销,L形的限位弹簧经其竖边与横穿挡销的端部通孔配合穿设在横穿挡销的一端；闸瓦托的上部闸钎穿孔上方设有与挂钩体配合的限位凸台。本发明结构简单,装配、操作方便,使用安全可靠。(A brake shoe fixing structure convenient for brake shoe replacement comprises a brake shoe arranged on a brake shoe support and brake pin through holes arranged on the brake shoe and the brake shoe support, wherein a brake shoe locking and releasing mechanism is arranged on the brake shoe support; the brake shoe locking and releasing mechanism comprises a handle hinged to the upper part of the brake shoe support through a first pin shaft, the handle is hinged to the upper end of a connecting rod consisting of a pair of arc plates through a second pin shaft, the lower end of the connecting rod is hinged to the upper end of a brake shoe lock pin through a third pin shaft, a hook body is arranged at the upper end of the brake shoe lock pin, a transverse stop pin for assembling a fastening nut is arranged on the connecting rod, and an L-shaped limiting spring is matched with a through hole at the end part of the transverse stop pin through the vertical edge of the L-shaped limiting spring and penetrates through one end of the transverse stop pin; and a limiting boss matched with the hook body is arranged above the brake pin through hole at the upper part of the brake shoe support. The invention has simple structure, convenient assembly and operation and safe and reliable use.)

1. A brake shoe fixing structure convenient for brake shoe replacement comprises a brake shoe (1) and a brake head (2), wherein a convex arc surface of the brake shoe (1) is attached to a concave arc surface of the brake head (2), a convex shoe nose in the middle of the brake shoe (1) is matched with a groove arranged in the middle of the brake head (2), and brake bit through holes are formed in the brake shoe (1) and the brake head (2), and the brake shoe fixing structure is characterized in that a brake shoe locking and releasing mechanism (3) is arranged on the brake head (2); the brake shoe locking and releasing mechanism (3) comprises a handle (301) which is hinged to the upper part of the brake shoe support (2) through a first pin shaft (201), the middle upper part of the handle (301) is hinged to the upper end of a connecting rod (303) through a second pin shaft (302), the connecting rod (303) consists of a pair of arc-shaped plates with convex arc surfaces facing outwards, the lower end of the connecting rod (303) is hinged to the upper end of a brake shoe locking pin (305) through a third pin shaft (304), the brake shoe locking pin (305) is a rectangular cross-section locking pin matched with the brake shoe (1) and a brake drill through hole on the brake shoe support (2), a hook body (306) protruding out of the outer side surface of the brake shoe locking pin is arranged at the upper end of the brake shoe locking pin (305), transverse blocking pins (307) protruding out of the connecting rod (303) are arranged at the middle lower part of the connecting rod (303), and an arc-shaped sleeve (308) is arranged between the two plates of the connecting rod (303) and sleeved on the transverse blocking pin (307), an L-shaped limiting spring (309) is arranged at one end of the transverse stop pin (307) in a penetrating way by matching the vertical edge of the L-shaped limiting spring with the through hole at the end part of the transverse stop pin (307), the transverse edge of the limiting spring (309) is arranged in the spring assembling hole of the connecting rod (303) in a penetrating way, the end part of the vertical edge of the limiting spring (309) is provided with a lug-shaped side convex ring (3010), and the other end of the transverse stop pin (307) is provided with a fastening nut (3011); the upper part of the back of the brake head (2) is provided with a groove (202) for embedding and assembling the brake shoe locking and releasing mechanism (3), and a limit boss (203) matched with the hook body (306) is arranged above a brake pin through hole at the upper part of the brake head (2).

2. The brake shoe fixing structure for facilitating brake shoe replacement as claimed in claim 1, wherein the front and rear surfaces of the brake shoe locking pin (305) are arc-shaped surfaces.

3. The brake shoe fixing structure for facilitating brake shoe replacement as claimed in claim 1, wherein said handle (301) is in the shape of a tri-fold line.

Technical Field

The invention relates to a brake device of a railway vehicle, in particular to a brake shoe fixing structure convenient for brake shoe replacement.

Background

At present, railway freight car adopts brake pin and the fixed brake shoe of brake head support complex mode, this kind of fixed mode is when changing the brake head, brake pin ring need be taken off, then take off the brake pin again and carry out the brake shoe and unload, the dress operation, the process is comparatively loaded down with trivial details, and cause the brake pin to warp because of the unable reason of closely laminating with the brake head support of brake shoe easily, be difficult for taking off, influence the technical check time, cause the outer interpolation of brake pin (the brake pin passes the brake shoe die-pad hold-in palm hole but does not pass the brake head hole) easily when changing the brake head in addition, there is the potential safety hazard that the brake shoe drops, the brake pin ring that loses easily in addition also can lead to the brake pin to drop and then causes the brake shoe to drop, bring huge risk for vehicle safe operation. CN108001476A discloses a brake shoe fixed knot constructs, this brake shoe fixed knot constructs prevents that the brake rod from droing through set up brake rod stop device on the brake head, has solved the problem that uses brake rod ring sum split pin to exist, but this kind of brake rod fixed knot constructs's brake rod stop device structure and assembly are complicated relatively, and brake rod stop device's components of a whole that can function independently structure also does not benefit to the quick replacement of brake shoe.

Disclosure of Invention

The invention aims to provide a brake shoe fixing structure convenient for brake shoe replacement, aiming at solving the problems in the prior art, and the brake shoe fixing structure convenient for brake shoe replacement has the advantages of simple structure, convenience in assembly and operation, safety and reliability.

The technical scheme for realizing the purpose is as follows: a brake shoe fixing structure convenient for brake shoe replacement comprises a brake shoe and a brake head, wherein a convex arc surface of the brake shoe is attached to a concave arc surface of the brake head, a convex shoe nose in the middle of the brake shoe is matched with a groove arranged in the middle of the brake head, brake pin through holes are formed in the brake shoe and the brake head, and a brake shoe locking and releasing mechanism is arranged on the brake head; the brake shoe locking and releasing mechanism comprises a handle hinged to the upper part of the brake shoe support through a first pin shaft, the middle upper part of the handle is hinged to the upper end of a connecting rod through a second pin shaft, the connecting rod consists of a pair of arc-shaped plates with convex arc surfaces facing outwards, the lower end of the connecting rod is hinged to the upper end of a brake shoe lock pin through a third pin shaft, the brake shoe lock pin is a rectangular cross-section lock pin matched with brake drill rod through holes on the brake shoe and the brake shoe support, a hook body protruding out of the outer side surface of the brake shoe lock pin is arranged at the upper end of the brake shoe lock pin, a transverse stop pin with two ends protruding out of the connecting rod is arranged at the middle lower part of the connecting rod, a spacer sleeve is arranged between the two arc-shaped plates of the connecting rod in a sleeved mode on the transverse stop pin, and an L-shaped limiting spring is matched with a through hole at the end part of the transverse stop pin through the vertical edge of the L-shaped limiting spring to penetrate through one end of the transverse stop pin, the transverse edge of the limiting spring is arranged in a spring assembling hole of the connecting rod in a penetrating manner, the end part of the vertical edge of the limiting spring is provided with a lug-shaped side convex ring, and the other end of the transverse stop pin is provided with a fastening nut; the upper part of the back of the brake head is provided with a groove for the brake shoe to lock and assemble with the release mechanism in an embedding way, and a limit boss matched with the hook body is arranged above the brake pin through hole at the upper part of the brake head.

The brake shoe fixing structure convenient for brake shoe replacement is characterized in that the front and back surfaces of the brake shoe lock pin are arc surfaces.

The brake shoe fixing structure convenient for brake shoe replacement is characterized in that the handle is in a three-fold line shape.

The invention has the beneficial effects that:

1. the brake shoe locking and releasing mechanism which is simple in structure and integrated in connection is adopted to realize the installation and fixation of the brake shoe, the brake shoe locking and releasing mechanism and the brake shoe support can be assembled only through a pin shaft, meanwhile, the brake shoe can be replaced only by manually carrying out simple upward lifting and downward pressing handle operation to complete the brake shoe releasing and locking, and the brake shoe locking and releasing mechanism has the characteristics of simple structure and convenience in assembly and operation.

2. Brake shoe replacement operation is simplified, the labor intensity of brake shoe replacement can be reduced, and the work efficiency of brake shoe replacement is greatly improved.

3. The brake shoe lock pin is limited by the brake shoe locking and releasing mechanism to prevent the brake shoe lock pin from slipping, and is limited by the hook body to prevent the brake shoe lock pin from slipping downwards, so that the brake shoe lock is safe and reliable.

4. The lifting of the brake shoe lock pin utilizes the lever principle, so that the operation is more labor-saving.

5. There is no problem of missing fittings.

6. The same applies to the modification of the used brake shoe fixing structure.

7. The application cost is low.

Drawings

FIG. 1 is a schematic view of a brake shoe fixing structure for facilitating the replacement of a brake shoe according to the present invention.

FIG. 2 is a schematic view of the brake shoe locking and brake shoe releasing mechanism of the present invention.

FIG. 3 is a schematic view of the brake head structure of the present invention.

In the figure: 1. brake shoes; 2. a brake head; 201. a first pin shaft; 202. a groove; 203. a limiting boss; 3. a brake shoe locking and releasing mechanism; 301. a handle; 302. a second pin shaft; 303. a connecting rod; 304. a third pin shaft; 305. a brake shoe lock pin; 306. a hook body; 307. a stop pin is crossed; 308. a spacer sleeve; 309. a limiting spring; 3010. a side convex ring; 3011. and (5) tightening the nut.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in figure 1, the brake shoe fixing structure convenient for brake shoe replacement comprises a brake shoe 1 and a brake head 2, wherein the convex arc surface of the brake shoe 1 is attached to the concave arc surface of the brake head 2, the middle convex shoe nose of the brake shoe 1 is matched with the groove arranged in the middle of the brake head 2, and brake drill rod through holes are formed in the brake shoe 1 and the brake head 2. As shown in FIG. 1, two brake pin through holes are formed on the upper side and the lower side of the shoe nose of the brake shoe 1 in a vertically opposite manner, and two brake pin through holes are formed on the brake shoe 2 in a vertically opposite manner corresponding to the two brake pin through holes formed in the brake shoe 1. The brake head 2 is hinged with a brake shoe locking and releasing mechanism 3 through a first pin shaft 201. The first pin 201 is locked with a cotter pin for easy disassembly.

As shown in fig. 2, the brake shoe locking and releasing mechanism 3 includes a handle 301, the upper end of the handle 301 is provided with a hinge hole for matching with the first pin 201, the middle upper portion of the handle 301 is hinged with the upper end of a connecting rod 303 through a second pin 302, the connecting rod 303 is composed of a pair of arc plates with convex arc surfaces facing outwards, the lower end of the connecting rod 303 is hinged with the upper end of a brake shoe lock pin 305 through a third pin 304, and the second pin 302 and the third pin 304 are riveted pins. The brake shoe lock pin 305 is a rectangular cross-section lock pin which is matched with four brake pin through holes on the brake shoe 1 and the brake head 2, and the brake shoe lock pin 305 is a conical pin with the length dimension and the width dimension of the upper end cross section being larger than those of the lower end cross section, so that a pin body can smoothly enter the brake pin through holes. The upper end of the brake shoe lock pin 305 is provided with a hook body 306 protruding out of the outer side surface of the brake shoe lock pin, and the lower end surface of the hook body 306 is a plane which forms an angle of 90 degrees with the outer side surface of the hook body. A transverse stop pin 307 with two ends protruding out of two side faces of the connecting rod 303 is arranged at the middle lower part of the connecting rod 303, a spacing sleeve 308 is arranged between the two arc-shaped plates of the connecting rod 303 and sleeved on the transverse stop pin 307, an L-shaped limiting spring 309 is arranged at one end of the transverse stop pin 307 in a penetrating manner through the vertical edge of the L-shaped limiting spring and a through hole at the end part of the transverse stop pin 307 in a matching manner, the lower transverse edge of the limiting spring 309 is arranged in a spring assembly hole of the connecting rod 303 in a penetrating manner, and the spring assembly holes of the embodiment in fig. 2 are arranged on the two arc-shaped plates of the connecting rod 303 oppositely. The vertical edge end of the limiting spring 309 is provided with a side convex ring 3010, and the side convex ring 3010 of the embodiment shown in the figure is in a auricle shape. A fastening nut 3011 is disposed at the other end of the transverse stop pin 307, and a fastening locknut is adopted as the fastening nut 3011. The fastening nut 3011 cooperates with a through hole traversing the end of the stop pin 307 to clamp the spacing spring 309 on the corresponding side of the link 303.

As shown in FIG. 3, the brake head 2 is provided at the upper rear portion thereof with a groove 202 for fitting the brake shoe locking and releasing mechanism 3, and a stopper boss 203 is provided above the upper brake pin hole of the brake head 2 to be fitted to the lower end surface of the hook 306.

The brake shoe fixing structure convenient for brake shoe replacement has the advantages that the front surface of the brake shoe lock pin 305 is a concave arc-shaped surface, and the rear surface of the brake shoe lock pin 305 is a convex arc-shaped surface, so that the brake shoe lock pin 305, the brake shoe 1 and four brake pin through holes on the brake shoe support 2 can be more smoothly penetrated and assembled, and the matching is more stable.

The brake shoe fixing structure for conveniently replacing the brake shoe can be provided with the handle 301 in an arc structure. The handle 301 of the embodiment of fig. 2 is provided in a three-fold line shape, and meanwhile, the production processing, the operation performance and the assembly space of the handle are considered.

The brake shoe fixing structure convenient for brake shoe replacement has the working principle that: when the brake shoe 1 is disassembled, the handle 301 is lifted up to enable the handle 301 to rotate anticlockwise around the first pin shaft 201, the handle 301 overcomes the resistance of the limiting spring 309, the brake shoe lock pin 305 is driven to move upwards through the connecting rod 303, when the handle 301 rotates to be in a vertical state (the limit position of anticlockwise rotation of the handle 301), the brake shoe lock pin 305 is separated from a brake pin through hole on the upper side surface of a brake shoe 1 shoe nose, and the brake shoe 1 can be disassembled; when the brake shoe 1 is installed, the shoe nose of the brake shoe 1 is embedded into the shoe nose embedding groove on the brake shoe support 2 to be matched, then the handle 301 is rotated clockwise, the handle 301 transmits downward force through the connecting rod 303 to drive the brake shoe lock pin 305 to move downwards, and the brake shoe lock pin 305 penetrates through four brake pin through holes on the brake shoe 1 and the brake shoe support 2 to fix the brake shoe 1; when the handle 301 rotates clockwise, the handle 301 overcomes the resistance of the limiting spring 309 and moves until the handle 301 is contacted with the spacing sleeve 308 (the limit position of the clockwise rotation of the handle 301), the limiting spring 309 resets, the side convex ring 3010 of the limiting spring 309 is located above the handle 301 to limit the handle 301, and when the handle 301 rotates clockwise to the limit position, the hook body 306 of the brake shoe lock pin 305 is matched with the limit boss 203 at the same time to complete the installation and fixation of the brake shoe.