CN111594559A

CN111594559A - Split wheel-mounted brake disc

Info

Publication number: CN111594559A
Application number: CN202010521126.9A
Authority: CN
Inventors: 邹震; 杨智勇; 张东升; 韩建民; 杨俊�; 牛瑞; 李志强; 朱新宇; 葛继兵; 胡杰
Original assignee: Beijing Jiaotong University; Nanjing CRRC Puzhen Haitai Brake Equipment Co Ltd
Current assignee: Beijing Jiaotong University; Nanjing CRRC Puzhen Haitai Brake Equipment Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-08-28
Anticipated expiration: 2040-06-10
Also published as: CN111594559B

Abstract

The invention relates to a split wheel-mounted brake disc, which comprises a plurality of disc bodies arranged along the circumferential direction, wherein butt-jointed connecting columns are arranged at the end parts of the disc bodies, which are mutually butted, the connecting columns are respectively provided with pin grooves with opposite openings and positioning grooves with opposite openings, the axes of the pin grooves are parallel to the diameters of the splicing parts of the disc bodies, the calibers of the openings of the pin grooves are smaller than the maximum inner diameter of the pin grooves, the axes of the positioning grooves are vertical to the brake disc surface, the positioning grooves are positioned at one side of the pin grooves, which is far away from the brake disc surface, pins are radially inserted into the pin grooves of the connecting columns to realize the connection between the disc bodies and limit the circumferential and axial movement between the disc bodies, the pins are provided with limiting grooves vertical to the brake disc surface, positioning blocks are provided with limiting columns corresponding to the positioning blocks, the positioning blocks are, thereby realizing the displacement full-constraint reliable connection between the disc bodies.

Description

Split wheel-mounted brake disc

Technical Field

The invention relates to a method for connecting disc bodies of wheel-mounted brake discs for a railway vehicle, which is suitable for various types of railway trains adopting the wheel-mounted brake discs.

Technical Field

Disc brakes are commonly adopted at present for rail transit trains with the speed of more than 80km/h, and comprise wheel-mounted brake discs and shaft-mounted brake discs. The wheel-mounted brake discs are positioned on two sides of the wheel and are tightly attached to the wheel spoke plate through the positioning columns and the bolt fasteners.

Brake discs are subjected to a combination of various loads during braking and wear from the pads, with brake disc failure typically manifested as wear-to-limit failure and friction face fatigue crack length overrun failure. In the train operation and maintenance process, the situation that the brake disc needs to be replaced due to the failure of the brake disc often occurs. At present, the split type design of the split type brake disc of the railway vehicle mainly aims at a shaft-mounted brake disc, and the split type design of a wheel-mounted brake disc is rarely reported. To the structure of current wheel dress brake disc, need at first move back the wheel and then can change when changing the brake disc, the operation is inconvenient, the cycle length, especially moves back the wheel in-process and can cause the damage of wheel hub hole and axle box bearing, increases the manpower and materials cost among the maintenance and repair process.

Adopt split type wheel dress brake disc structure can realize changing under the prerequisite of not moving back the wheel, but the connection convenience and the reliability between the split type wheel dress brake disc body are crucial to the process of changing the brake disc and the security in service after the brake disc is changed.

Through search and discovery, the chinese patent application CN 108468731 a discloses a split wheel-mounted brake disc for a railway vehicle, wherein the butt-jointed ends of the brake disc bodies are provided with a convex block 3, a positioning block 5 is provided with a concave part 6 adapted to the convex part 4 of the convex block 3, and the adjacent brake disc bodies are positioned by the positioning block and fixed by bolts after being butt-jointed, so as to realize the splicing of the brake disc.

The Chinese patent application CN 110307276A discloses a method for connecting split wheel-mounted brake discs, wherein a groove 5 and a flange 6 are respectively arranged at the end part of a disc body, and the disc body is spliced and then passes through the groove 5 and the flange 6 through bolts and is fastened to realize splicing of the disc body.

The end parts of the two split wheel-mounted brake discs are of symmetrical structures and are fixed through bolts. The disadvantage is that the stress is concentrated on the bolt and the disassembly and assembly are troublesome.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a split wheel brake disc, which overcomes the defects in the prior art.

In order to solve the technical problems, the invention provides a split wheel-mounted brake disc, which comprises a plurality of disc bodies arranged along the circumferential direction, and is characterized in that: the brake disc comprises at least one pair of adjacent disc bodies, connecting columns which are spliced are arranged at the end parts of the adjacent disc bodies, pin grooves with opposite openings and positioning grooves with opposite openings are respectively formed in the connecting columns, the axes of the pin grooves are parallel to the diameter of the spliced part of the disc bodies, the calibers of the openings of the pin grooves are smaller than the maximum inner diameter of the inside of the pin grooves, the axes of the positioning grooves are perpendicular to the brake disc surface, the positioning grooves are located on one sides, away from the brake disc surface, of the pin grooves, the pin is inserted into the pin grooves of the connecting columns along the radial direction to achieve connection between the disc bodies and limit circumferential and axial movement between the disc bodies, limiting grooves perpendicular to the brake disc surface are formed in the pin, limiting columns corresponding to the positioning blocks are arranged in the limiting grooves, the positioning blocks.

The tray body has the same structure, two connecting columns are arranged on the tray body, the pin is in transition fit with the connecting columns of the tray body, and the positioning block and the positioning groove are in interference fit in the width direction; the diameter of the limiting column is smaller than the width of the limiting groove.

The invention has the beneficial effects that: the tray bodies have the same structure, and the assembly interchangeability is good; the disk body passes through special-shaped pin connection, has restricted circumference and axial displacement between the two, and the locating piece inserts in the constant head tank, the radial movement between the restriction disk body, and during spacing post inserted the spacing groove, avoided special-shaped pin to separate along radial to the displacement full restraint reliable connection between the disk body has been realized. In addition, the positioning block is provided with a threaded through hole, so that the positioning block can be taken out conveniently when the brake disc is disassembled.

Drawings

Fig. 1 is an exploded view of a split wheel-mounted brake disc for a railway vehicle.

Fig. 2 is a schematic side view of the heat sink ribs of the tray body.

FIG. 3 is a schematic view of the friction surface side of the disc.

Fig. 4 is a schematic structural diagram of the positioning block.

Fig. 5 is a schematic view of the pin structure.

In the figure, 1-A disc body, 2-connecting column, 3-special-shaped pin, 4-positioning block, 5-B disc body, 6-pin groove, 7-positioning groove, 8-mounting hole, 9-transition groove, 10-threaded through hole, 11-limiting column and 12-limiting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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.

As shown in fig. 1, fig. 2 and fig. 3, the split wheel-mounted brake disc of this embodiment includes two semicircular disc bodies a 1 and B5, connecting columns 2 are disposed at the end portions of the disc bodies a 1 and B5, which are butted with each other, and pin grooves 6 with opposite openings and positioning grooves 7 with opposite openings are formed in the connecting columns 2. The axis of the pin groove 6 is parallel to the diameter of the splicing part of the disc body, the pin groove 6 is C-shaped, namely the caliber of the opening of the pin groove 6 is smaller than the maximum inner diameter of the pin groove 6. The axis of the positioning groove 7 is vertical to the brake disc surface and the positioning groove 7 is positioned at one side of the pin groove 6 far away from the brake disc surface. The radial insertion of the pin 3 into the pin slot 6 of the connecting post 2 effects the connection of the a disc 1 and the B disc 5 and limits circumferential and axial movement therebetween. The positioning block 4 is axially inserted into the positioning groove 7 to limit radial movement between the disk body A1 and the disk body B5. The positioning block 4 is provided with a threaded through hole 10 and a limiting column 11, the pin 3 is provided with a limiting groove 12, and the limiting column 11 is inserted into the limiting groove 12 to prevent the pin 3 from sliding out along the radial direction.

In this embodiment, the tray body a 1, the tray body B5, the connecting column 2, the positioning block 4 and the pin 3 are made of the same material. The a tray 1 and the B tray 5 have the same structure, and two connection posts 2 are disposed thereon. Arrange 6 notch cuttype mounting holes 8 on the disk body, the heat dissipation muscle adopts platelike heat dissipation muscle, has set up three radial groove simultaneously, realizes in components of a whole that can function independently rim plate and wheel assembling process with the circumference and the radial positioning of wheel.

The positioning block 4 is constructed as shown in fig. 4. The center of the positioning block 4 is provided with a threaded through hole 10 for taking out the positioning block 4 when the split disc is disassembled, and one side of the positioning block 4 is provided with a limiting column 11. The positioning block 4 is inserted into the positioning groove 7 to limit the radial movement of the a disc body 1 and the B disc body 5, as shown in fig. 1.

The pin 3 is concave, as shown in fig. 5, the protruding part is used for limiting the circumferential and axial movement between the disk body a 1 and the disk body B5, a limiting groove is formed in the protruding part, and a limiting column 11 is inserted into the limiting groove 12 to prevent the special-shaped pin 3 from being separated along the radial direction. The pin 3 is in transition fit with the A disc body 1 and the B disc body 5, and the positioning block 4 is in interference fit with the positioning groove 7 in the width direction; the diameter of the limiting column 11 is smaller than the width of the limiting groove 12.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a split type wheel dress brake disc, includes a plurality of disk bodies (1, 5) of arranging along the circumferencial direction, its characterized in that: there are at least a pair of adjacent disk body (1, 5), its tip that docks each other is provided with spliced pole (2) to piecing together, spliced pole (2) are seted up relative cotter way of opening (6) and relative constant head tank of opening (7) respectively, the axis of cotter way (6) is parallel with the diameter of disk body concatenation department and the bore of cotter way (6) opening part is less than the inside biggest internal diameter of cotter way (6), the axis of constant head tank (7) is perpendicular with the braking quotation and constant head tank (7) are located the one side that braking quotation was kept away from to cotter way (6), round pin (3) are along realizing the connection between disk body (1, 5) and restriction circumference and the axial displacement between the two in radial insertion spliced pole (2) round pin groove (6), spacing groove (12) perpendicular with the braking quotation is seted up to round pin (3), locating piece (4) have spacing post (11) that correspond with it, spacing post (11) embedding spacing groove (12) are in when locating piece (4) Limiting the radial movement between the disks (1, 5) and preventing the pin (3) from slipping out in the radial direction.

2. A split type wheel brake disc according to claim 1, wherein: the positioning block (4) is provided with a threaded through hole (10) for disassembly, and the threaded through hole (10) is vertical to the surface of the brake disc.

3. A split type wheel brake disc according to claim 1, wherein: the fit between the pin (3) and the pin groove (6) is transition fit, and the width directions of the positioning block (4) and the positioning groove (7) adopt interference fit; the diameter of the limiting column (11) is smaller than the width of the limiting groove (12).

4. A split type wheel brake disc according to claim 1, wherein: the top surface of the connecting column (2) is flush with the inner side surface of the brake disc.

5. A split type wheel brake disc according to claim 1, wherein: the connecting column (2), the pin (3), the positioning block (4) and the disc bodies (1 and 5) are made of the same material.

6. A split type wheel brake disc according to claim 1, wherein: the semi-circular disc body is provided with two semi-circular disc bodies (1, 5) with the same structure, and the end connecting column (2) is also the same structure.

7. A split type wheel brake disc according to claim 1, wherein: the pin slot (6) is C-shaped.

8. A split type wheel brake disc according to claim 1, wherein: the positioning groove (7) is C-shaped.