CN109340282B

CN109340282B - Composite pad disc for brake wheel

Info

Publication number: CN109340282B
Application number: CN201811242253.4A
Authority: CN
Inventors: 张万顺; 易喆; 张耕靖; 夏孟聪
Original assignee: Xian Aviation Brake Technology Co Ltd
Current assignee: Xian Aviation Brake Technology Co Ltd
Priority date: 2018-10-24
Filing date: 2018-10-24
Publication date: 2023-06-30
Anticipated expiration: 2038-10-24
Also published as: CN109340282A

Abstract

A composite pad for a brake wheel includes a welding assembly and a plurality of pad sets. Each gasket group consists of an inner gasket and an outer gasket. Each gasket is respectively arranged in each gasket mounting hole on the disc surface of the welding assembly disc; the inner gasket in the gasket group is positioned on one side of the welding assembly, which is provided with the heat insulation piece, and the outer gasket is positioned on the other side of the welding assembly, so that the inner gasket and the outer gasket are riveted. When each gasket group is assembled with the welding assembly, the gasket groups are combined into the composite gasket disc. The utility model eliminates the factor of the deformation of the pad welding component caused by pressure and the thermal deformation of the material generated by the heat transfer of the high-temperature brake disc after the material is braked, and simultaneously adds the heat insulation piece, thereby greatly enhancing the heat insulation effect and protecting the cylinder seat component formed by non-high-temperature-resistant materials.

Description

Composite pad disc for brake wheel

Technical Field

The utility model relates to the field of aircraft braking, in particular to a composite pad disc for uniformly loading and insulating heat of a braking device of a braking wheel.

Technical Field

The brake wheel is generally composed of a wheel assembly and a brake device. The brake device is composed of parts or components such as a brake disc, a cylinder seat, a piston component, a brake shell and the like. When braking, high-pressure oil enters the piston cavity, the piston moves forwards under the action of pressure, the pressing disc is pressed to the moving disc and the static disc, at the moment, friction force is generated between the moving disc and the static disc, and the friction force is transmitted to the wheel assembly through the concave key of the moving disc, so that the aircraft brakes or turns. When the aircraft is braked, in order to ensure that the acting force of the piston is uniformly loaded on the pressing disc, the situation that partial pressure is overlarge to produce eccentric wear of the brake disc and cause brake failure is avoided, a steel pad disc is often added between the pressing disc and the piston, and a brake disc wear indication rod is arranged on the steel pad disc or penetrates through the steel pad disc to conveniently observe the wear degree of the brake disc.

After braking of the aircraft, the brake disc absorbs a great deal of aircraft kinetic energy and converts it into heat energy, which increases the temperature of the brake disc. The temperature of the brake disc increases to transfer the heat to the surroundings and cause the temperature of surrounding materials to increase. Modern aircraft brake discs are typically made of carbon-based composite materials and can withstand high temperatures up to 1200 ℃. However, materials adjacent to the brake disc are aluminum alloy, rubber and hydraulic oil, and the materials have poor high temperature resistance, and particularly the hydraulic oil can be denatured or carbonized when reaching more than 149 ℃, so that the working stability of the brake system is affected. It is well defined in the general Specification for aircraft wheels and brake devices GJB1184A-2005 that the temperature of the hydraulic oil in the piston cavity should not exceed 149 ℃ after braking in any case except for stopping take-off. At this time, the steel pad disc plays a role in separating the brake disc from the non-high-temperature-resistant material, and the cylinder seat assembly of the non-high-temperature-resistant material is protected.

With the continuous upgrading of the aircraft war technical index. The brake pressure and the energy absorbed by the brake are required to be increased continuously, so that the temperature of the brake disc is further increased. The thin steel pad disc can produce warp deformation under the high pressure of piston and the high temperature simultaneous action after the brake, can't realize steadily transmitting the pressure that the piston produced and with the function of separating the brake disc of high temperature after the brake with the cylinder seat subassembly of non-high temperature resistant material to can let the pilot rod produce the risk of rupture after the steel pad disc warp. The weight of the thick steel pad disc cannot meet the requirement of the aircraft on high performance and light weight of the brake device. The steel saucer cannot meet the use requirement.

The utility model of patent number 201220597167.7 discloses a heat insulating plate, which adopts two layers of bearing plates, a heat insulating frame is arranged between the bearing plates, and heat insulating pieces are filled in the heat insulating frame to form a three-dimensional insulating structure. Because the volume and the weight of the heat insulation board are large, the heat insulation board is only suitable for heat insulation between general connection structures, cannot bear large pressure and is not suitable for an aircraft brake device.

In the patent of the utility model 201510319872.9, a heat shield assembly for an aircraft brake assembly is disclosed, which consists of an upper heat shield and a lower heat shield, with ceramic fiber paper placed in between, and mounted between a cylinder block and a piston. The heat insulation plate assembly has small coverage range, is easy to deform during maintenance, has large demand on the installation space of the landing gear, and can not meet the requirement of a high-energy aircraft brake device.

The utility model of the application number 2015106338247 discloses a heat insulation device for an aviation brake wheel, which is arranged between a cylinder seat assembly and a brake disc assembly of the aviation brake wheel and consists of an outer heat insulation sheet, an inner heat insulation sheet, rivets, a supporting framework and a reinforcing ring, wherein the supporting framework is of an annular structure, and a plurality of radial unloading grooves are formed in the circumferential direction of the supporting framework; the outer heat insulating sheet and the inner heat insulating sheet are round, are made of titanium alloy, are fixedly arranged on the upper surface and the lower surface of the supporting framework through rivets, and are positioned between the unloading grooves in the circumferential direction; the reinforcing ring is arranged on the inner side of the supporting framework, and a limiting groove is formed in the inner edge of the reinforcing ring, so that the heat insulation device can move in the axial direction of the air brake wheel but cannot rotate around the circumferential direction. The heat insulation device solves the problem that buckling deformation can be generated under the high-temperature action after braking, but the heat insulation effect is similar to that of a steel heat insulation disc, and the heat insulation device cannot meet the function of separating the brake disc with high temperature from a cylinder seat component made of non-high-temperature-resistant materials after braking.

Disclosure of Invention

In order to overcome the eccentric wear of a brake disc caused by buckling deformation, stably transfer the pressure generated by a piston, reduce the heat transfer of the brake disc with high temperature after braking to a cylinder seat assembly made of non-high temperature resistant materials, and be installed in a brake device with high space requirement, the utility model provides a composite pad disc for a brake wheel.

The utility model includes a welding assembly and a plurality of shim packs; each gasket group consists of an inner gasket and an outer gasket. Each gasket is respectively arranged in each gasket mounting hole on the disc surface of the welding assembly disc; the inner gasket in the gasket group is positioned at one side of the welding assembly, where the heat insulation piece is arranged, the small outer diameter end of the inner gasket is sequentially arranged in an inner gasket through hole in the center of the gasket disc, an inner gasket through hole in the center of the heat insulation piece and a gasket mounting hole in the center of the framework, so that the stepped end face of the outer circumferential surface of the inner gasket is attached to the end face of one end of the framework in the welding assembly; the outer gasket is positioned at the other side of the welding assembly, the small-diameter end of the outer gasket is arranged in a gasket mounting hole in the center of the framework, and the inner end face of the outer gasket is attached to the inner end face of the inner gasket; the end face of the step on the outer circumferential surface of the outer gasket is attached to the end face of the other end of the framework in the welding assembly; and riveting the inner gasket and the outer gasket. And when the gasket groups are assembled with the welding assembly, the gasket groups are combined into the composite type gasket disc.

The number of the gasket groups is 6-10, and the gasket groups are uniformly distributed on the disc surface of the welding assembly.

The welding assembly comprises a framework, a heat insulating piece, a reinforcing ring and a pad disc. The reinforcing ring is fixed on one side of the framework, and the disk surface of the reinforcing ring is attached to the framework at the outer edge of the framework. And the plurality of fan-shaped through holes on the surface of the reinforcing ring are respectively filled with heat insulation pieces. The inner end face of the pad disc is attached to and fixed with the outer end face of the reinforcing ring; a heat insulating piece is arranged between the inner surface of the pad disc and the surface of the framework. The framework, the heat insulation piece, the reinforcing ring and the cushion disc are coaxial.

The outer diameter of the framework is smaller than the deformation of the machine wheel guide rail; the inner diameter of the framework is the same as the outer diameter of the brake shell. A plurality of gasket mounting holes are uniformly distributed on the disk surface of the framework along the circumference. A plurality of groups of expansion joints are arranged on the outer circumferential surface of the framework, anti-cracking holes are arranged at the tail ends of the expansion joints, and the aperture of one anti-cracking hole is slightly larger than the outer diameter of the indicating rod and is used as a through hole of the indicating rod. The inner circumferential surface of the framework is uniformly provided with a plurality of radial U-shaped limit grooves which are used for limiting the circumferential rotation of the composite pad disc after assembly.

The outer diameter of the reinforcing ring is smaller than the deformation of the machine wheel guide rail; the inner diameter of the reinforcing ring is the same as the outer diameter of the brake housing. A plurality of expansion joints are arranged on the outer circumferential surface of the reinforcing ring, anti-cracking holes are arranged at the tail ends of the expansion joints, and the aperture of one anti-cracking hole is slightly larger than the outer diameter of the indicating rod and is used as a through hole of the indicating rod. The inner circumferential surface of the reinforcing ring is uniformly provided with a plurality of radial U-shaped limiting grooves which are used for limiting circumferential rotation of the composite pad disc after assembly. A plurality of fan-shaped through holes are uniformly distributed on the disc surface of the reinforcing ring, and each fan-shaped through hole is positioned between each expansion joint; and heat insulation pieces are filled in the fan-shaped through holes.

The thickness of the framework is 1.5mm, the diameters of the gasket mounting holes are 42mm, and the center distance between each gasket mounting hole and the framework is 165mm; the length of the expansion joint is 39mm, and the width is 1mm; the diameter of the anti-cracking hole at the tail end of each expansion joint is 6mm; the size of the limit groove is 11×8mm.

The thickness of the reinforcing ring is 1.5mm; the distance between the outer circular arc edge of each fan-shaped through hole and the center of the reinforcing ring is 190mm, the distance between the inner circular arc edge of each fan-shaped through hole and the center of the reinforcing ring is 130mm, and the distance between two bevel edges of each fan-shaped through hole and the edge of the adjacent expansion joint is 5mm; the number of the expansion joints is 5.

The external dimension of the heat insulating piece is consistent with the external dimension of the fan-shaped through hole on the reinforcing ring. The heat insulating piece is respectively provided with an inner gasket via hole, and the positions of the inner gasket via holes are respectively consistent with the positions of gasket mounting holes on the surface of the framework plate.

A plurality of inner gasket through holes are distributed on the disk surface of the pad disk, and the positions of the inner gasket through holes are respectively consistent with the positions of gasket mounting holes on the disk surface of the framework; the thickness of the pad disc is 0.3mm, and the aperture of each inner pad via hole on the surface of the pad disc is 50mm.

The outer circumferential surface of the outer gasket is in a step shape, and the small diameter of the outer gasket is smaller than the diameter of the gasket mounting hole on the framework. A groove matched with the piston is arranged at the center of the inner surface of the outer gasket.

The outer circumferential surface of the inner gasket is stepped, the outer diameter of the small diameter end of the inner gasket is the same as the small diameter of the outer gasket, and the axial height is also 1mm. The large outer diameter of the inner gasket is smaller than the aperture of the inner gasket via hole on the pad disc.

The small diameters of the outer gasket and the inner gasket matched with the welding assembly are 41mm, and the sum of the height of the small diameter end of the outer gasket and the height of the small diameter end of the inner gasket is 2mm; the aperture of a gasket mounting hole in the pad welding assembly is 42mm, and the thickness is 1.5mm; and when the outer gasket, the inner gasket and the pad welding assembly are assembled, a gap exists between the outer gasket and the inner gasket.

The utility model relates to a composite pad disc for a brake wheel, which is arranged between a cylinder seat assembly and a brake disc assembly of the brake wheel, wherein the composite pad disc consists of an outer gasket, an inner gasket, rivets and a welding assembly, and the welding assembly sequentially consists of a pad disc, a reinforcing ring, a framework and a heat insulation part filled in the reinforcing ring.

The framework is of an annular structure, and circular grooves with the same number and diameter as those of the pistons are formed in the circumferential direction of the framework; a plurality of expansion joints are arranged between the circular grooves at the outer edge of the expansion joint, and the tail end of each expansion joint is provided with a circular anti-cracking groove; limiting grooves are uniformly distributed on the inner edge of the frame, so that the frame can move along the axial direction of the aviation brake wheel but cannot rotate around the circumferential direction.

The reinforcing ring is of an annular structure, a plurality of expansion joints are arranged at the outer edge of the reinforcing ring and are the same as the framework, and a circular anti-cracking groove is arranged at the tail end of each expansion joint; a sector groove is arranged between the expansion joints and used for filling the heat insulation piece; limiting grooves are uniformly distributed on the inner edge of the frame, so that the frame can move along the axial direction of the aviation brake wheel but cannot rotate around the circumferential direction.

The heat insulating piece is a high-flexibility heat insulating piece and has extremely low heat conductivity, the heat insulating piece is filled between the filling grooves of the reinforcing ring heat insulating piece, and round grooves with the same number and the same size as the frameworks are arranged at the corresponding positions of the piston.

The pad disc is of an annular structure, and circular grooves with the same number and diameter as the pistons are formed in the circumferential direction of the pad disc; a plurality of expansion joints are arranged between the circular grooves at the outer edge of the expansion joint, and the tail end of each expansion joint is provided with a circular anti-cracking groove; limiting grooves are uniformly distributed on the inner edge of the frame, so that the frame can move along the axial direction of the aviation brake wheel but cannot rotate around the circumferential direction. The pad is matched with the framework to fix the reinforcing ring and the heat insulation piece through welding, so that the welding assembly is formed.

The outer gasket and the inner gasket are both revolution bodies, the cross section is of a convex structure, rivet holes are uniformly distributed on the end faces, the outer gasket and the inner gasket are fixedly installed on the upper surface and the lower surface of the welding assembly through rivets, and the outer gasket and the inner gasket are located between the circular grooves in the circumferential direction. Gaps are reserved between the upper surface, the lower surface and the circular groove after the outer gasket and the inner gasket are installed with the welding assembly, but the gaps cannot fall off from the circular groove of the welding assembly. The outer gasket, the inner gasket and the welding assembly can have height difference, so that the thickness of the brake is reduced, and a heat insulation solution can be provided for a compact brake device.

Compared with the structure of the existing steel pad, the outer pad and the inner pad are assembled and have gaps with the pad welding assembly, the acting force of the piston is transmitted to the pressing disc through the inner pad and the outer pad, the acting force of the piston does not directly act on the pad welding assembly, and the factor of influencing the deformation of the pad welding assembly due to pressure is eliminated. The outer gasket and the inner gasket which are connected together have the height difference with the welding assembly, and the piston directly acts on the outer gasket and the inner gasket, and is irrelevant to the thickness of the welding assembly, so that the thickness of the composite pad is far smaller than that of the steel pad structure. The expansion joint and the circular anti-cracking groove are respectively added on the outer circle sides of the framework, the reinforcing ring and the pad disc in the welding assembly, so that the thermal deformation of materials generated by the heat transfer of the high-temperature brake disc after the materials are braked is eliminated, namely the risks of eccentric wear of the brake disc and breakage of the indicating rod caused by uneven force transfer after the deformation of the steel pad disc in the background art are eliminated, the heat insulating piece is added, the heat insulating effect is greatly enhanced, and the cylinder seat assembly formed by non-high-temperature-resistant materials is protected. The comparison of the temperature before and after the improvement of a certain product is shown in the following table, and the brake state is reduced by 30-40 ℃ after the improvement of the compound heat insulation plate.

MJ in the table is the energy unit megajoules.

Drawings

Fig. 1 is a prior art pallet.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a partial enlarged view of the portion B in fig. 2.

Fig. 4 is another prior art pallet.

Fig. 5 is A-A view of fig. 4.

Fig. 6 is a partial enlarged view of the portion B in fig. 5.

Fig. 7 is a schematic structural view of the skeleton of the present utility model.

Fig. 8 is a schematic view of the structure of the heat insulator of the present utility model.

Fig. 9 is a schematic structural view of the reinforcing ring of the present utility model.

Fig. 10 is a schematic structural view of the saucer of the present utility model.

Fig. 11 is a schematic view of the structure of the welding assembly of the present utility model.

Fig. 12 is a view in the A-A direction of fig. 11.

Fig. 13 is a partial enlarged view of the portion B in fig. 12.

Fig. 14 is a schematic structural view of the outer gasket.

Fig. 15 is an A-A view of fig. 14.

Fig. 16 is a schematic structural view of the composite pallet of the present utility model.

Fig. 17 is a view in the A-A direction of fig. 16.

Fig. 18 is a schematic structural view of the present utility model.

Fig. 19 is an A-A view of fig. 18.

Fig. 20 is a partial enlarged view of the B portion in fig. 19.

FIG. 21 is a schematic view of the composite pad of the present utility model assembled to a brake assembly.

FIG. 22 is a schematic view of a prior art saucer

Fig. 23 is a partial schematic view of fig. 22.

In the figure: 1. a skeleton; 2. a heat insulating member; 3. a reinforcing ring; 4. a saucer; 5. welding the assembly; 6. an inner gasket; 7. an outer gasket; eighth, rivet; 9. a composite pad disc; 10. a piston; 11. a brake disc; 12. a brake housing; 13. a gasket mounting hole; 14. an expansion joint; a U-shaped limit groove; 16. and (5) an inner pad via hole.

Detailed Description

The embodiment is a composite pad disc for a braking device of a certain machine, comprising a welding assembly 5 and a plurality of pad groups; each of the gasket groups consists of an inner gasket 6 and an outer gasket 7. Each gasket is respectively arranged in each gasket mounting hole on the disc surface of the disc of the welding assembly 5; the inner gasket 6 in the gasket group is positioned at one side of the welding assembly with the heat insulation piece, and the small outer diameter end of the inner gasket is sequentially arranged in the inner gasket through hole in the center of the gasket disc 4, the inner gasket through hole in the center of the heat insulation piece 2 and the gasket mounting hole in the center of the framework 1, so that the stepped end face of the outer circumferential surface of the inner gasket is attached to the end face of one end of the framework 1 in the welding assembly 5; the outer gasket is positioned at the other side of the welding assembly, the small-diameter end of the outer gasket 7 is arranged in a gasket mounting hole in the center of the framework, and the inner end surface of the outer gasket is attached to the inner end surface of the inner gasket; the end face of the step on the outer circumferential surface of the outer gasket is attached to the end face of the other end of the framework in the welding assembly; and riveting the inner gasket and the outer gasket. The inner gasket and the outer gasket are fixedly connected through rivets 8 to form a gasket group. The number of the gasket groups is 6-10, and the gasket groups are uniformly distributed on the disc surface of the welding assembly 5; in this embodiment, the number of the gasket sets is 10.

When each gasket group is assembled with the welding assembly 5, the gasket groups are combined into a composite gasket disc.

The welding assembly 5 comprises a framework 1, a heat insulation piece 2, a reinforcing ring 3 and a pallet 4. Wherein the reinforcing ring 3 is fixed on one side of the framework 1, and the disk surface of the reinforcing ring is attached to the outer edge of the framework. The heat insulation pieces 2 are respectively filled in the fan-shaped through holes on the surface of the reinforcing ring. The inner end face of the pad 4 is attached to and fixed with the outer end face of the reinforcing ring; a heat insulating member 2 is arranged between the inner surface of the pallet and the surface of the framework 1. The framework 1, the heat insulation piece 2, the reinforcing ring 3 and the saucer 4 are welded to form a welding assembly 5.

The framework 1, the heat insulation piece 2, the reinforcing ring 3 and the cushion disc 4 are coaxial.

The small diameter ends of the inner gaskets in each gasket group are sequentially filled into the inner gasket through holes of the gasket disc 3, the inner gasket through holes of the heat insulation piece 2 and the gasket mounting holes of the framework 1; the small-diameter end of the outer gasket 7 is arranged in the gasket mounting hole of the framework, and the inner surface of the inner gasket is attached to the inner surface of the outer gasket; the inner and outer shims are riveted by rivets 8.

The outer diameter of the framework 1 is smaller than the deformation of the machine wheel guide rail; the inner diameter of the framework is the same as the outer diameter of the brake shell. A plurality of gasket mounting holes 13 are uniformly distributed on the disk surface of the framework along the circumference. A plurality of groups of expansion joints 14 are arranged on the outer circumferential surface of the framework, the tail ends of the expansion joints are provided with anti-cracking holes, and the aperture of one anti-cracking hole is slightly larger than the outer diameter of the indicating rod and is used as a through hole of the indicating rod. The inner circumferential surface of the framework is uniformly provided with a plurality of radial U-shaped limit grooves 15 which are used for limiting the circumferential rotation of the composite pad disc after assembly.

The framework 1 is annular. The outer diameter of the framework is smaller than the deformation of the machine wheel guide rail; the inner diameter of the framework is the same as the outer diameter of the brake shell. A plurality of gasket mounting holes 13 are uniformly distributed on the disk surface of the framework along the circumference. A plurality of groups of expansion joints 14 are arranged on the outer circumferential surface of the framework, the tail ends of the expansion joints are provided with anti-cracking holes, and the aperture of one anti-cracking hole is slightly larger than the outer diameter of the indicating rod and is used as a through hole of the indicating rod. The inner circumferential surface of the framework is uniformly provided with a plurality of radial U-shaped limit grooves 15 which are used for limiting the circumferential rotation of the composite pad disc after assembly. In this embodiment: the thickness of the framework is 1.5mm; the diameters of the 8 gasket mounting holes are 42mm, and the distances between the centers of the gasket mounting holes and the center of the framework are 165mm; the length of the expansion joint is 39mm, and the width is 1mm; the diameter of the anti-cracking hole at the tail end of each expansion joint is 6mm; the size of the U-shaped limit groove is 11X 8mm.

The outer diameter of the reinforcing ring 3 is smaller than the deformation of the machine wheel guide rail; the inner diameter of the reinforcing ring is the same as the outer diameter of the brake housing. A plurality of expansion joints 14 are formed on the outer circumferential surface of the reinforcing ring, and at the ends of the expansion joints, an anti-cracking hole is formed, and the aperture of one of the anti-cracking holes is slightly larger than the outer diameter of the indicating rod, so that the indicating rod is used as a through hole. The inner circumferential surface of the reinforcing ring is uniformly provided with a plurality of radial U-shaped limit grooves 15 which are used for limiting the circumferential rotation of the composite pad disc after assembly. A plurality of fan-shaped through holes are uniformly distributed on the disc surface of the reinforcing ring, and each fan-shaped through hole is positioned between each expansion joint; and heat insulation pieces are filled in the fan-shaped through holes.

A plurality of fan-shaped through holes are uniformly distributed on the disc surface of the reinforcing ring, and each fan-shaped through hole is respectively positioned between the expansion joints; and heat insulation pieces are filled in the fan-shaped through holes. In this embodiment: the thickness of the reinforcing ring is 1.5mm; the distance between the outer circular arc edge of each fan-shaped through hole and the center of the reinforcing ring is 190mm, the distance between the inner circular arc edge of each fan-shaped through hole and the center of the reinforcing ring is 130mm, and the distance between two bevel edges of each fan-shaped through hole and the edge of the adjacent expansion joint is 5mm; the number of the expansion joints is 5.

The number of the heat insulating pieces 2 is consistent with that of the fan-shaped through holes on the surface of the reinforcing ring, and the heat insulating pieces are made of ceramic fiber paper, and the external dimensions of the heat insulating pieces are consistent with those of the fan-shaped through holes of the reinforcing ring. The heat insulating piece is respectively provided with an inner gasket via hole, and the positions of the inner gasket via holes are respectively consistent with the positions of gasket mounting holes on the surface of the framework 1. In this embodiment, the hole diameter of the inner pad via hole is 48.5mm.

The pad 4 is also circular. The outline structure of the pad is similar to that of the skeleton 1. A plurality of inner gasket through holes are distributed on the surface of the tray, and the positions of the inner gasket through holes are respectively consistent with the positions of gasket mounting holes on the surface of the skeleton tray. The thickness of the pad is smaller than that of the framework, and the aperture of the inner pad via hole on the surface of the pad is larger than that of the pad mounting hole on the surface of the framework. In this embodiment, the thickness of the saucer 4 is 0.3mm; the diameters of the 8 inner gasket through holes are all 50mm.

A plurality of heat insulators 2 are respectively arranged in the fan-shaped through holes on the reinforcing ring 3, and the reinforcing ring 3 is welded with the saucer 4 and the framework 1 to form the welding assembly 5.

The outer gasket 7 is a circular piece. The outer circumferential surface of the outer gasket 7 is stepped, and the small diameter of the outer gasket is smaller than the diameter of the gasket mounting hole on the framework 1. According to the installation requirement of the piston on the brake device, a groove matched with the piston is arranged in the center of the inner surface of the outer gasket. In this embodiment: the diameter of the small diameter end of the outer gasket is 41mm, and the axial height is 1mm; the diameter of the large diameter end of the outer gasket is 46mm; 4 rivet holes are uniformly distributed on the disc surface of the outer gasket; the diameter of the central groove of the outer gasket is 18mm, and the depth is 2mm.

The inner gasket 6 is annular, the outer circumferential surface of the inner gasket is also stepped, the outer diameter of the small diameter end of the inner gasket is the same as the small diameter of the outer gasket, and the axial height is also 1mm. The large outer diameter of the inner gasket is smaller than the aperture of the inner gasket via hole on the pad disc. 4 rivet holes are uniformly distributed on the disk surface of the inner gasket. In this embodiment, the diameter of the center through hole of the inner gasket is 18mm.

The small diameters of the outer gasket 7 and the inner gasket 6 matched with the welding assembly 5 are 41mm, and the sum of the heights of the small diameter end of the outer gasket and the small diameter end of the inner gasket is 2mm; the aperture of a gasket mounting hole in the pad welding assembly is 42mm, and the thickness is 1.5mm; when the outer gasket, the inner gasket and the pad welding assembly are assembled, a gap exists between the outer gasket and the inner gasket.

During operation, the piston 10 stretches out and contacts the inner gasket 6, the inner gasket 10 is riveted with the outer gasket 7, the outer gasket 7 acts on the brake disc 11 and is used for braking, the U-shaped limiting groove on the inner circumferential surface of the welding component 5 is matched with the brake shell 12 to limit the circumferential movement of the welding component, the welding component 5 is axially close to the brake disc along with the inner gasket and the outer gasket, and because the welding component is filled with the heat insulating piece, the heat transfer to the cylinder seat component is greatly reduced, gaps are reserved between the heat insulating piece and the riveted inner gasket and outer gasket, the possibility of thermal deformation of the welding component is reduced, the movement of the positions of the inner gasket and the outer gasket caused is reduced, and the piston acting force is ensured to be uniformly loaded on the brake disc.

After the utility model is installed on a brake device, the bearing part of the piston is contacted with the inner pad and is transmitted to the brake disc through the outer pad, and the non-bearing part of the piston is embedded into the inner pad and the outer pad, so that the actual occupied thickness of the device is reduced.

Claims

1. A composite pad for a brake wheel comprising a welding assembly and a plurality of pad sets; each gasket group consists of an inner gasket and an outer gasket; each gasket is respectively arranged in each gasket mounting hole on the disc surface of the welding assembly disc; the inner gasket in the gasket group is positioned at one side of the welding assembly, where the heat insulation piece is arranged, the small outer diameter end of the inner gasket is sequentially arranged in an inner gasket through hole in the center of the gasket disc, an inner gasket through hole in the center of the heat insulation piece and a gasket mounting hole in the center of the framework, so that the stepped end face of the outer circumferential surface of the inner gasket is attached to the end face of one end of the framework in the welding assembly; the outer gasket is positioned at the other side of the welding assembly, the small-diameter end of the outer gasket is arranged in a gasket mounting hole in the center of the framework, and the inner end face of the outer gasket is attached to the inner end face of the inner gasket; the end face of the step on the outer circumferential surface of the outer gasket is attached to the end face of the other end of the framework in the welding assembly; riveting the inner gasket and the outer gasket; when each gasket group is assembled with the welding assembly, the gasket groups are combined into a composite gasket disc; the welding component comprises a framework, a heat insulating piece, a reinforcing ring and a pad disc; wherein the reinforcing ring is fixed on one side of the framework, and the disk surface of the reinforcing ring is attached to the outer edge of the framework; the plurality of fan-shaped through holes on the surface of the reinforcing ring are respectively filled with heat insulation pieces; the inner end face of the pad disc is attached to and fixed with the outer end face of the reinforcing ring; a heat insulation piece is arranged between the inner surface of the pad disc and the surface of the framework; the framework, the heat insulation piece, the reinforcing ring and the pad disc are coaxial; the number of the gasket groups is 6-10, and the gasket groups are uniformly distributed on the disc surface of the welding assembly.

2. The composite pad for a brake wheel of claim 1, wherein the outer diameter of the backbone is less than the deflection of the wheel rail; the inner diameter of the framework is the same as the outer diameter of the brake shell; a plurality of gasket mounting holes are uniformly distributed on the disk surface of the framework along the circumference; a plurality of groups of expansion joints are arranged on the outer circumferential surface of the framework, the tail ends of the expansion joints are provided with anti-cracking holes, and the aperture of one anti-cracking hole is slightly larger than the outer diameter of the indication rod and is used as a via hole of the indication rod; the inner circumferential surface of the framework is uniformly provided with a plurality of radial U-shaped limit grooves which are used for limiting the circumferential rotation of the composite pad disc after assembly.

3. The composite pad for a brake wheel of claim 1, wherein the outer diameter of the reinforcing ring is less than the deflection of the wheel rail; the inner diameter of the reinforcing ring is the same as the outer diameter of the brake shell; a plurality of expansion joints are arranged on the outer circumferential surface of the reinforcing ring, anti-cracking holes are arranged at the tail ends of the expansion joints, and the aperture of one of the anti-cracking holes is slightly larger than the outer diameter of the indicating rod and is used as a through hole of the indicating rod; the inner circumferential surface of the reinforcing ring is uniformly provided with a plurality of radial U-shaped limiting grooves which are used for limiting the circumferential rotation of the composite pad disc after assembly; a plurality of fan-shaped through holes are uniformly distributed on the disc surface of the reinforcing ring, and each fan-shaped through hole is positioned between each expansion joint; and heat insulation pieces are filled in the fan-shaped through holes.

4. The composite pad for a brake wheel according to claim 2, wherein the thickness of the skeleton is 1.5mm, the diameters of the pad mounting holes are 42mm, and the center distance between each pad mounting hole and the skeleton is 165mm; the length of the expansion joint is 39mm, and the width is 1mm; the diameter of the anti-cracking hole at the tail end of each expansion joint is 6mm;

5. The composite pad for a brake wheel of claim 1, wherein the thermal shield has a physical dimension corresponding to a physical dimension of the fan-shaped through hole in the reinforcing ring; the heat insulating piece is respectively provided with an inner gasket via hole, and the positions of the inner gasket via holes are respectively consistent with the positions of gasket mounting holes on the surface of the framework plate.

6. The composite pad for a brake wheel according to claim 1, wherein a plurality of inner pad through holes are distributed on the surface of the pad, and the positions of the inner pad through holes are respectively consistent with the positions of pad mounting holes on the surface of the skeleton; the thickness of the pad disc is 0.3mm, and the aperture of each inner pad via hole on the surface of the pad disc is 50mm.

7. The composite pad for a brake wheel of claim 1, wherein the outer pad is a circular pad;

the outer circumferential surface of the outer gasket is stepped, and the small diameter of the outer gasket is smaller than the diameter of a gasket mounting hole on the framework; a groove matched with the piston is arranged in the center of the inner surface of the outer gasket;

the outer circumferential surface of the inner gasket is stepped, the outer diameter of the small diameter end of the inner gasket is the same as the small diameter of the outer gasket, and the axial height is also 1mm; the large outer diameter of the inner gasket is smaller than the aperture of the inner gasket via hole on the pad disc; the small diameters of the outer gasket and the inner gasket matched with the welding assembly are 41mm, and the sum of the height of the small diameter end of the outer gasket and the height of the small diameter end of the inner gasket is 2mm; the aperture of a gasket mounting hole in the pad welding assembly is 42mm, and the thickness is 1.5mm; and when the outer gasket, the inner gasket and the pad welding assembly are assembled, a gap exists between the outer gasket and the inner gasket.