CN221779885U - Brake device and suspension DR system - Google Patents

Abstract

The brake device comprises a fixing piece, a rotating shaft, a brake disc and an electromagnetic brake mechanism, wherein the rotating shaft is rotatably connected with the fixing piece, the brake disc is sleeved on the rotating shaft, and the brake disc is connected with the rotating shaft through an expansion structure; the electromagnetic braking mechanism is arranged on the fixing piece and comprises an electromagnetic assembly and an elastic resetting piece, wherein the electromagnetic assembly can magnetically adsorb the brake disc and lose magnetic attraction to release the brake disc, the elastic resetting piece can apply elastic force for enabling the electromagnetic assembly and the brake disc to be far away to the electromagnetic assembly, and the brake device realizes braking through electromagnetic action and releases the braking through the assistance of the elastic resetting piece; because the expansion structure comprises expansion pieces, the expansion pieces can reduce the assembly gap between the rotating shaft and the brake disc in the process of realizing connection between the brake disc and the rotating shaft, thereby being beneficial to reducing the return gap during braking and improving the operation precision of the suspension DR system.

Description

Brake device and suspension DR system

Technical Field

The application relates to the technical field of radiodiagnosis equipment, in particular to a brake device and a suspension DR system.

Background

The DR system is a direct digital radiography system, which mainly uses the principle of X-ray penetrability, and forms images when traversing the human body due to different tissue densities, and is a traditional and inexpensive medical image examination device.

The DR system is divided into a suspension DR and an upright DR according to a frame structure, and the prior suspension DR can meet the advantage of multi-position shooting due to multiple degrees of freedom, so that the demands are gradually increased. The suspension DR includes telescopic cylinder, ox head subassembly, brake equipment and pivot etc. brake disc and ox head subassembly among the brake equipment are all fixed in the pivot, when satisfying many positions and shoot the demand, need ox head subassembly and brake disc to revolute the axis rotation of pivot, for the convenience brake disc in the epaxial assembly of pivot, need set up sufficient assembly clearance between brake disc and pivot, and this assembly clearance can lead to the return stroke clearance when ox head subassembly is stopped great, and then leads to the operation precision that hangs DR system lower.

Disclosure of utility model

The application provides a brake device and a suspension DR system, which are used for solving the technical problem of lower operation precision of the suspension DR system.

According to a first aspect, an embodiment provides a brake device, including: the fixing piece is used for being connected with a telescopic piece in the suspension DR system; the rotating shaft is rotatably connected with the fixing piece and is used for being connected with a cow head assembly in the suspension DR system; the brake disc is sleeved on the rotating shaft, the brake disc is connected with the rotating shaft through an expansion structure, the expansion structure comprises an expansion piece, and the expansion piece can reduce the assembly gap between the rotating shaft and the brake disc in the process of connecting the brake disc with the rotating shaft; the electromagnetic braking mechanism is arranged on the fixing piece and comprises an electromagnetic assembly and an elastic reset piece, wherein the electromagnetic assembly comprises a coil and a magnetic piece, and the magnetic piece can change magnetism due to current in the coil; when the magnetic piece has magnetism, the brake disc is attracted through magnetism; releasing the brake disc when the magnetic piece loses magnetic attraction; the elastic reset piece can apply elastic force for enabling the electromagnetic assembly to be far away from the brake disc to the electromagnetic assembly.

In an alternative embodiment, the expansion structure further comprises an expansion sleeve, the expansion sleeve is located between the rotating shaft and the brake disc in the radial direction of the rotating shaft, the expansion sleeve is provided with a conical side surface matched with the brake disc and/or the rotating shaft, the expansion sleeve is further provided with a mounting hole, and the expansion piece is matched with the mounting hole to extrude the conical side surface in the radial direction of the rotating shaft, so that the expansion sleeve is attached to the brake disc and the expansion sleeve is attached to the rotating shaft.

In an alternative embodiment, the tapered side surface comprises a tapered peripheral surface provided on the inner peripheral surface and/or the outer peripheral surface of the expansion sleeve.

In an alternative embodiment, the electromagnetic braking mechanism comprises a sliding part and a linear bearing with pre-pressing, wherein the sliding part is arranged on the fixed part through the linear bearing, and the sliding part can reciprocate relative to the fixed part in the axial direction of the rotating shaft; the electromagnetic assembly and the elastic resetting piece are distributed on two sides of the linear bearing in the axial direction of the rotating shaft, the electromagnetic assembly is fixedly connected with the sliding piece, and the elastic resetting piece is elastically abutted between the linear bearing and the sliding piece.

In an alternative embodiment, the sliding piece comprises a sliding shaft and a limiting part, and the limiting part is fixedly connected with the sliding shaft; the elastic resetting piece is sleeved on the sliding shaft, and the elastic resetting piece is elastically abutted with the limiting part in the axial direction of the rotating shaft.

In an alternative embodiment, a plurality of the electromagnetic braking mechanisms are provided, and a plurality of the electromagnetic braking mechanisms are arranged at intervals in the circumferential direction of the rotating shaft.

In an alternative embodiment, the fixing member is provided with a limiting structure, and the limiting structure is located between two adjacent electromagnetic braking mechanisms in the circumferential direction of the rotating shaft so as to limit the electromagnetic assembly to move in the circumferential direction of the rotating shaft.

In an alternative embodiment, the fixing member includes a fixing cylinder and a mounting plate mounted on the fixing cylinder, and the electromagnetic braking mechanism is mounted on the mounting plate.

In an alternative embodiment, the fixing member includes a fixing cylinder, the rotating shaft is rotatably assembled in the fixing cylinder, and the rotating shaft abuts against the fixing cylinder in the axial direction of the rotating shaft through a circlip so as to limit the rotating shaft to move relative to the fixing cylinder in the axial direction of the rotating shaft.

According to a second aspect, in one embodiment, a suspension DR system is provided, including a frame, a telescopic member, a bull head assembly and a braking device according to any of the foregoing, the bull head assembly and the braking disc are located on two sides of the fixing member in an axial direction of the rotating shaft, the bull head assembly is connected with the rotating shaft, and the fixing member is connected with the frame through the telescopic member.

According to the brake device and the suspension DR system of the embodiment, the brake device comprises a fixing piece, a rotating shaft, a brake disc and an electromagnetic brake mechanism, wherein the rotating shaft is rotatably connected with the fixing piece, the brake disc is sleeved on the rotating shaft, and the brake disc is connected with the rotating shaft through an expansion structure; the electromagnetic braking mechanism is arranged on the fixing piece and comprises an electromagnetic assembly and an elastic resetting piece, wherein the electromagnetic assembly can magnetically adsorb the brake disc and lose magnetic attraction to release the brake disc, the elastic resetting piece can apply elastic force for enabling the electromagnetic assembly and the brake disc to be far away to the electromagnetic assembly, and the brake device realizes braking through electromagnetic action and releases the braking through the assistance of the elastic resetting piece; because the expansion structure comprises expansion pieces, the expansion pieces can reduce the assembly gap between the rotating shaft and the brake disc in the process of realizing connection between the brake disc and the rotating shaft, thereby being beneficial to reducing the return gap during braking and improving the operation precision of the suspension DR system.

Drawings

FIG. 1 is a schematic diagram of a connection structure of a brake device, a bull head assembly, and a telescoping member in a suspension DR system according to one embodiment;

FIG. 2 is a schematic diagram showing an internal structure of a brake device in a suspension DR system according to one embodiment.

In the figure: 1. a telescoping member; 2. a bull head assembly; 3. a brake device; 31. a fixing member; 311. a fixed cylinder; 312. a mounting plate; 313. a limit structure; 32. a rotating shaft; 33. a circlip; 34. a brake disc; 35. an expansion structure; 351. an expansion sleeve; 352. an expansion member; 36. an electromagnetic braking mechanism; 361. an electromagnetic assembly; 362. a slider; 3621. a sliding shaft; 3622. a limit part; 363. a linear bearing; 364. an elastic reset piece.

Detailed Description

The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operational steps involved in the embodiments may be sequentially exchanged or adjusted in a manner apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of describing certain embodiments and are not necessarily intended to imply a required composition and/or order.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.

The embodiment of the application provides a brake device 3, wherein the brake device 3 is applied to a suspension DR system to assist in realizing the rotation angle adjustment of a ox head assembly 2, so as to meet the multi-angle shooting requirement of the suspension DR system.

Referring to fig. 1 and 2, the braking device 3 includes a fixing member 31, a rotating shaft 32, a brake disc 34 and an electromagnetic braking mechanism 36, the fixing member 31 is used for being connected with a telescopic member 1 in a suspending DR system, the rotating shaft 32 is rotatably connected with the fixing member 31, a ox head assembly 2 and the brake disc 34 in the suspending DR system are located at two sides of the fixing member 31 in an axial direction of the rotating shaft 32, and the ox head assembly 2 and the brake disc 34 are fixedly connected with the rotating shaft 32, so that a motor or other driving structure can drive the ox head assembly 2 and the brake disc 34 to rotate through the rotating shaft 32. The electromagnetic braking mechanism 36 and the brake disc 34 are located on the same side of the fixing piece 31 in the axial direction of the rotating shaft 32, and the electromagnetic braking mechanism 36 can be combined with the brake disc 34 after the ox head assembly 2 rotates in place so as to complete adjustment of the rotation angle of the ox head assembly 2.

The electromagnetic braking mechanism 36 is mounted on the fixed member 31, the electromagnetic braking mechanism 36 includes an electromagnetic assembly 361 and an elastic restoring member 364, the electromagnetic assembly 361 includes a coil and a magnetic member, the magnetic member is capable of changing magnetism due to current in the coil; when the magnetic member has magnetism, the brake disc 34 is attracted by magnetism; releasing the brake disc 34 when the magnetic element loses magnetic attraction; the elastic restoring member 364 can apply an elastic force to the electromagnetic assembly 361 to separate the electromagnetic assembly 361 from the brake disc 34; therefore, the braking device 3 realizes braking in an electromagnetic braking mode, and the elastic return piece 364 applies elastic force to the electromagnetic assembly 361 to release the braking, so that the rotation angle of the ox head assembly 2 can be conveniently and reliably adjusted.

In the normal working process of the brake device 3, after the ox head assembly 2 rotates in place, the coil in the electromagnetic assembly 361 is powered off, as the magnetic attraction of the magnetic piece to the brake disc 34 is larger than the elastic acting force of the elastic reset piece 364 to the electromagnetic assembly 361, the magnetic piece overcomes the elastic acting force of the elastic reset piece 364 and moves towards the brake disc 34, the magnetic piece magnetically adsorbs the brake disc 34 to realize brake braking, and the rotating shaft 32 stops rotating; when the ox head assembly 2 is required to rotate, the coil in the electromagnetic assembly 361 is electrified, the magnetic force of the magnetic member disappears, and the electromagnetic assembly 361 moves back to the brake disc 34 under the action of the elastic force of the elastic reset member 364 so as to release the brake.

In the embodiment of the application, the brake disc 34 in the brake device 3 is sleeved on the rotating shaft 32, the brake disc 34 is connected with the rotating shaft 32 through the expansion structure 35, the expansion structure 35 comprises the expansion piece 352, and the expansion piece 352 can reduce the assembly gap between the rotating shaft 32 and the brake disc 34 in the process of realizing the connection of the brake disc 34 and the rotating shaft 32, so that the return gap in braking is reduced, and the operation precision of the suspension DR system is improved.

In some embodiments, for the expansion structure 35, grooves may be formed on the outer peripheral surface of the rotating shaft 32 and the inner peripheral surface of the brake disc 34, and after the brake disc 34 is sleeved on the rotating shaft 32, the grooves of the rotating shaft 32 and the grooves of the brake disc 34 enclose to form a mounting hole, and the inner wall surface of the mounting hole may include a conical surface. The expanding piece 352 can be a pin or can also be an expanding screw, the expanding piece 352 can be matched with the mounting hole, along with the insertion of the pin into the mounting hole or the screwing of the expanding screw into the mounting hole, the expanding piece 352 can squeeze the conical surface to deform the conical surface, and the gap between the expanding piece 352 and the wall surface of the mounting hole is reduced, so that the fixed connection between the rotating shaft 32 and the brake disc 34 is realized through the expanding piece 352, and the gap between the brake disc 34 and the expanding piece 352 and the gap between the rotating shaft 32 and the expanding piece 352 are reduced through the squeezing of the expanding piece 352 to realize the purpose of reducing the return gap during braking.

In some embodiments, referring to fig. 2, the expansion structure may further include an expansion sleeve 351, the expansion sleeve 351 is sleeved on the rotating shaft 32, and the expansion sleeve 351 is located between the rotating shaft 32 and the brake disc 34 in a radial direction of the rotating shaft 32; the inner peripheral surface of the expansion sleeve 351 matched with the rotating shaft 32 is provided with a conical side surface, or the outer peripheral surface of the expansion sleeve 351 matched with the brake disc 34 is provided with a conical side surface, or the inner peripheral surface or the outer peripheral surface of the expansion sleeve 351 are provided with conical side surfaces; the mounting hole sets up on the tight cover 351 expands, and the in-process that expands tight piece 352 entered into the mounting hole can extrude the pore wall of mounting hole, makes the toper side take place deformation in the radial of pivot 32, with the clearance that reduces between tight cover 351 expands and the pivot 32 and the clearance between tight cover 351 expands and the brake disc 34, realizes the laminating of tight cover 351 outer peripheral face and brake disc 34, tight cover 351 inner peripheral face and pivot 32 expands, thereby realizes the purpose that reduces the return stroke clearance when braking.

Further, the tapered side surface on the inner circumferential surface of the expansion sleeve 351 may be a tapered circumferential surface arranged around the rotating shaft 32, and the tapered side surface on the outer circumferential surface of the expansion sleeve 351 may be a tapered circumferential surface arranged around the rotating shaft 32, so that the expansion sleeve 351 is uniformly deformed in the circumferential direction of the rotating shaft 32, and the degree of adhesion between the expansion sleeve 351 and the rotating shaft 32 and the degree of adhesion between the expansion sleeve and the brake disc 34 are improved.

For the fixing member 31, referring to fig. 1 and 2, in some embodiments, the fixing member 31 includes a fixing cylinder 311, a rotating shaft 32 passes through the fixing cylinder 311, the rotating shaft 32 is rotatably assembled in the fixing cylinder 311 through a bearing, and the rotating shaft 32 abuts against the fixing cylinder 311 in an axial direction of the rotating shaft 32 through a circlip 33 to limit the movement of the rotating shaft 32 relative to the fixing cylinder 311 in a circumferential direction thereof. If a clamping groove can be arranged on the outer peripheral surface of the rotating shaft 32, a circlip 33 is assembled in the clamping groove, so that the circlip 33 and a bearing at one axial end are propped against each other in the axial direction of the rotating shaft 32 to limit the axial displacement of the rotating shaft 32; alternatively, a clamping groove may be formed on the inner circumferential surface of the fixed cylinder 311, and the circlip 33 is also assembled in the clamping groove, so that the circlip 33 abuts against the bearing at the other axial end in the axial direction of the rotating shaft 32, and the circlip 33 abuts against the bearing at the other axial side in the axial direction, so as to limit the axial displacement of the rotating shaft 32.

Of course, in other embodiments, the fixing member 31 may further include a frame structure, and the rotating shaft 32 passes through the frame structure in an axial direction thereof and is rotatably engaged with the frame structure through a bearing.

For the electromagnetic brake mechanism 36, referring to fig. 2, in some embodiments, the electromagnetic brake mechanism 36 further includes a sliding member 362 and a linear bearing 363 with pre-compression, and the sliding member 362 is mounted on the fixed member 31 through the linear bearing 363; for example, the linear bearing 363 may be mounted on an end flange of the fixed cylinder 311, or the fixing member 31 may be provided and further include a mounting plate 312, the mounting plate 312 is sleeved on the fixed cylinder 311 and fixedly connected with the fixed cylinder 311, and the linear bearing 363 is mounted on the mounting plate 312; the sliding member 362 extends in the axial direction of the rotating shaft 32, the sliding member 362 may include a sliding shaft 3621, the sliding shaft 3621 passes through a linear bearing 363, and both ends of the sliding shaft 3621 are located outside the linear bearing 363, and the sliding member 362 may reciprocate in the axial direction of the rotating shaft 32 relative to the fixing member 31 under the action of the linear bearing 363.

The electromagnetic components 361 and the elastic resetting pieces 364 are distributed on two sides of the linear bearing 363 in the axial direction of the rotating shaft 32, the electromagnetic components 361 and the elastic resetting pieces 364 are located on the mounting plate 312 or two sides of the flange on the fixed cylinder 311 in the axial direction of the rotating shaft 32, the electromagnetic components 361 are located on one side of the linear bearing 363, which faces the brake disc 34, and the electromagnetic components 361 are fixedly connected with one end of the sliding shaft 3621, which faces the brake disc 34.

In an embodiment, please continue to refer to fig. 2, the sliding member 362 further includes a limiting portion 3622, the limiting portion 3622 may be integrally formed with the sliding shaft 3621, and of course, in other embodiments, the limiting portion 3622 may be fixed to the other end of the sliding shaft 3621 by a fastener, and the limiting portion 3622 may be a limiting plate or limiting protrusions circumferentially spaced apart from the sliding shaft 3621.

In one embodiment, the elastic restoring member 364 may be a spring, but in other embodiments, it may be a rubber member with better elasticity. With continued reference to fig. 2, the elastic restoring member 364 has a ring structure, where the elastic restoring member 364 is sleeved at the other end of the sliding shaft 3621, and one end of the elastic restoring member 364 in the axial direction of the rotating shaft 32 is abutted with the linear bearing 363, the other end is abutted with the limiting portion 3622, and after the electromagnetic component 361 loses magnetic force to release the brake disc 34, the elastic restoring member 364 can apply an elastic force to the sliding member 362 to enable the sliding member 362 to drive the electromagnetic component 361 to move relative to the fixing member 31 in a direction away from the brake disc 34 so as to completely release the brake.

Since the linear bearing 363 is fixed on the fixing member 31, during the assembly process of the sliding member 362 and the linear bearing 363, the linear bearing 363 is preloaded, so that the radial clearance between the sliding member 362 and the linear bearing 363 can be reduced by the acting force applied on the radial direction of the linear bearing 363, even the radial zero clearance between the sliding member 362 and the linear bearing 363 can be realized, in this way, during the braking process of the braking device 3, the return clearance of the braking device 3 can be reduced, and the zero clearance of the braking device 3 can be realized even by combining with the structure that the brake disc 34 is fixedly connected with the rotating shaft 32 through the expansion structure 35, thereby being beneficial to improving the operation precision of the suspension DR system.

It should be noted that the return clearance is understood to be the circumferential displacement of the bull head assembly 2 that continues to rotate about the rotation axis 32 after the electromagnetic assembly 361 is coupled to the brake disc 34, i.e., after braking, due to the assembly clearance between the components in the brake device 3. According to the application, as the brake disc 34 is fixed on the rotating shaft 32 through the expansion structure 35 and the linear bearing 363 is fixed on the fixing piece 31, under the action of the pre-compression of the linear bearing 363, the zero clearance between the sliding piece 362 and the linear bearing 363 is basically realized, so that the return clearance in the braking process of the braking device 3 can be effectively reduced, the zero return clearance of the braking device 3 is basically realized, and the running precision of the suspension DR system can be greatly improved.

Of course, in other embodiments, the linear bearing 363 may be provided without pre-pressing, or even the linear bearing 363 may be omitted, and only the brake disc 34 is fixed to the rotating shaft 32 by the expansion structure 35 to reduce the return clearance of the brake device 3. In one embodiment, a through hole extending in the axial direction of the rotating shaft 32 is provided on the mounting plate 312, so that the sliding member 362 passes through the through hole, one end of the sliding member 362 is connected with the electromagnetic assembly 361, the other end of the sliding member has a limiting portion 3622, the elastic restoring member 364 is sleeved on the sliding shaft 3621, the elastic restoring member 364 includes a compression spring, one end of the elastic restoring member 364 abuts against the mounting plate 312, the other end abuts against the limiting portion 3622, and the elastic restoring member 364 can apply an elastic force to the sliding member 362 to enable the sliding member 362 to drive the electromagnetic assembly 361 to move away from the brake disc 34.

Alternatively, in another embodiment, the elastic restoring member 364 is an extension spring, the limiting portion 3622 on the sliding member 362 abuts against the mounting plate 312, the elastic restoring member 364 is located between the mounting plate 312 and the electromagnetic assembly 361, one end of the elastic restoring member 364 is connected to the electromagnetic assembly 361, the other end of the elastic restoring member 364 is connected to the mounting plate 312, and the elastic restoring member 364 can apply an elastic tensile force to the electromagnetic assembly 361 to move the electromagnetic assembly 361 away from the brake disc 34.

In some embodiments, referring to fig. 2, a plurality of electromagnetic brake mechanisms 36 may be provided, for example, three, four, or more than five may be provided; the plurality of electromagnetic braking mechanisms 36 are arranged around the rotating shaft 32 and are arranged at intervals in the circumferential direction of the rotating shaft 32, and the plurality of electromagnetic braking mechanisms 36 are mounted on the mounting plate 312, so that the plurality of electromagnetic braking mechanisms 36 can attract the brake disc 34 in the braking process of the braking device 3, and the reliability and the stability of braking of the braking device 3 can be ensured.

Further, in some embodiments, referring to fig. 1, a limiting structure 313 may be further disposed on the fixing member 31, for example, a limiting structure 313 may be disposed on the flange of the mounting plate 312 or the fixing cylinder 311, the limiting structure 313 is located between two adjacent electromagnetic braking mechanisms 36 in the axial direction of the rotating shaft 32, the limiting structure 313 contacts with two adjacent electromagnetic assemblies 361 in the circumferential direction of the rotating shaft 32, and the two adjacent electromagnetic assemblies 361 are limited to rotate around the rotating shaft 32 under the action of the rotation moment by the limiting structure 313, so that cable damage of the electromagnetic assemblies 361 can be avoided.

The limiting structures 313 may include limiting blocks, each limiting block has an outer side surface attached to a side surface of an adjacent electromagnetic component 361, so that the electromagnetic component 361 can be guided to move in the axial direction of the rotating shaft 32 by two adjacent limiting structures 313 in the circumferential direction of the rotating shaft 32, and guiding of the electromagnetic component 361 to reciprocate is achieved. Of course, in other embodiments, the limiting structures 313 may further include a plurality of limiting columns, and the plurality of limiting columns are attached to the side surface of the electromagnetic assembly 361 to guide the electromagnetic assembly 361 to move axially on the rotating shaft 32 and limit the electromagnetic assembly 361 from rotating around the rotating shaft 32.

The embodiment of the application also discloses a suspension DR system, please refer to fig. 1, which comprises a frame (not shown in the figure), a telescopic piece 1, a ox head assembly 2 and a brake device 3 in any of the embodiments, wherein the ox head assembly 2 and the brake disc 34 are positioned at two sides of a fixing piece 31 in the axial direction of a rotating shaft 32, the ox head assembly 2 and the brake disc 34 are fixedly connected with the rotating shaft 32 so as to ensure that the ox head assembly 2 and the brake disc 34 can synchronously rotate along with the rotating shaft 32, the fixing piece 31 is connected with the frame through the telescopic piece 1, the telescopic piece 1 can comprise a telescopic cylinder, and the fixing piece 31 is connected with a telescopic end of the telescopic cylinder, so that under the action of a lifting device in the frame, the fixing piece 31, the ox head assembly 2 and the brake device 3 can lift up and down along with the telescopic end.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (10)

1. A brake apparatus, comprising:

The fixing piece is used for being connected with a telescopic piece in the suspension DR system;

The rotating shaft is rotatably connected with the fixing piece and is used for being connected with a cow head assembly in the suspension DR system;

The brake disc is sleeved on the rotating shaft, the brake disc is connected with the rotating shaft through an expansion structure, the expansion structure comprises an expansion piece, and the expansion piece can reduce the assembly gap between the rotating shaft and the brake disc in the process of connecting the brake disc with the rotating shaft;

The electromagnetic braking mechanism is arranged on the fixing piece and comprises an electromagnetic assembly and an elastic reset piece, wherein the electromagnetic assembly comprises a coil and a magnetic piece, and the magnetic piece can change magnetism due to current in the coil; when the magnetic piece has magnetism, the brake disc is attracted through magnetism; releasing the brake disc when the magnetic piece loses magnetic attraction; the elastic reset piece can apply elastic force for enabling the electromagnetic assembly to be far away from the brake disc to the electromagnetic assembly.

2. The brake apparatus of claim 1, wherein the expansion structure further comprises an expansion sleeve located between the rotor and the disc rotor in a radial direction of the rotor, the expansion sleeve having a tapered side surface mating with the disc rotor and/or the rotor, the expansion sleeve further having a mounting hole, the expansion member mating with the mounting hole to compress the tapered side surface in the radial direction of the rotor to achieve the fit of the expansion sleeve to the disc rotor, the expansion sleeve to the rotor.

3. Brake device according to claim 2, wherein the conical side surface comprises a conical circumferential surface arranged on the inner circumferential surface and/or the outer circumferential surface of the expansion shell.

4. The brake apparatus according to claim 1, wherein the electromagnetic brake mechanism includes a slider and a linear bearing with preload, the slider being mounted on the fixed member through the linear bearing, the slider being reciprocally movable in an axial direction of the rotating shaft with respect to the fixed member;

The electromagnetic assembly and the elastic resetting piece are distributed on two sides of the linear bearing in the axial direction of the rotating shaft, the electromagnetic assembly is fixedly connected with the sliding piece, and the elastic resetting piece is elastically abutted between the linear bearing and the sliding piece.

5. The brake apparatus of claim 4, wherein the slider comprises a sliding shaft and a limiting portion, the limiting portion being fixedly connected with the sliding shaft; the elastic resetting piece is sleeved on the sliding shaft, and the elastic resetting piece is elastically abutted with the limiting part in the axial direction of the rotating shaft.

6. The brake apparatus according to any one of claims 1 to 5, wherein a plurality of the electromagnetic brake mechanisms are provided, the plurality of the electromagnetic brake mechanisms being arranged at intervals in a circumferential direction of the rotating shaft.

7. The brake apparatus of claim 6, wherein the fixing member is provided with a limiting structure, and the limiting structure is located between two adjacent electromagnetic brake mechanisms in the circumferential direction of the rotating shaft to limit the electromagnetic assembly from moving in the circumferential direction of the rotating shaft.

8. A brake apparatus according to any one of claims 1 to 5, wherein the fixing member comprises a fixing cylinder and a mounting plate mounted on the fixing cylinder, the electromagnetic brake mechanism being mounted on the mounting plate.

9. The brake apparatus according to any one of claims 1 to 5, wherein the fixing member includes a fixing cylinder in which the rotating shaft is rotatably fitted, the rotating shaft being abutted against the fixing cylinder in an axial direction of the rotating shaft by a circlip to restrict the rotating shaft from moving in the axial direction thereof with respect to the fixing cylinder.

10. A suspended DR system comprising a frame, a telescopic member, a bull head assembly and a brake device according to any one of claims 1 to 9, wherein the bull head assembly and the brake disc are located on two sides of the fixed member in an axial direction of the rotating shaft, the bull head assembly is connected with the rotating shaft, and the fixed member is connected with the frame through the telescopic member.