Electromagnetic tread brake

Abstract

According to the electromagnetic tread brake, acting force is applied to an elastic push rod through an electromagnetic push rod of an electromagnetic head, the elastic push rod pushes a wedge-shaped piston to enable a push rod body of a brake shoe push rod mechanism to drive a brake shoe support to move, and therefore braking is achieved through contact between a brake shoe fixed to the brake shoe support and a moving part. When equipment is not provided with an air source system, braking of moving parts can be conveniently achieved. Meanwhile, electromagnetic force and spring force are adopted for driving, response is rapid, and the safety coefficient is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brake, in particular to an electromagnetic tread brake. BACKGROUND

[0002] The brake is a device with the function of decelerating, stopping or keeping the moving parts in a stopped state, and the industrial brake is mainly applied to mechanical braking of various mechanical driving supporting in transportation, metallurgy, railway, hoisting, mine and port. The existing tread brake is mostly pneumatic type, however, many devices do not have a special gas supply system, so when the device has the demand of using the tread brake, there are many difficulties. SUMMARY

[0003] The present application discloses an electromagnetic tread brake to overcome the above technical problems.

[0004] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0005] An electromagnetic tread brake, comprising an electromagnetic head, a coupling seat, a brake box, an elastic push rod, a wedge-shaped piston, a brake shoe push rod mechanism, a brake shoe holder, a swing arm and a cantilever beam.

[0006] The electromagnetic head is fixedly connected with the coupling seat, so that the electromagnetic push rod of the electromagnetic head can reciprocate along the axial direction of the coupling seat inside the coupling seat.

[0007] The electromagnetic push rod of the electromagnetic head is fixedly connected with the elastic push rod, and the elastic push rod reciprocates along the inner wall surface of the coupling seat in the axial direction of the coupling seat.

[0008] The wedge-shaped piston and the brake shoe push rod mechanism are arranged inside the brake box, and the brake box is fixedly connected with the side of the coupling seat away from the electromagnetic head.

[0009] The other end of the elastic push rod abuts against the large head of the wedge-shaped piston.

[0010] The small head of the wedge-shaped piston is connected with the brake shoe push rod mechanism, and when the elastic push rod reciprocates in the center line direction of the coupling seat, the wedge-shaped piston moves along the center line of the brake box, so that the push rod body on the brake shoe push rod mechanism can move in a direction perpendicular to the center line of the brake box.

[0011] A first return spring is arranged between the large head of the wedge-shaped piston and the brake shoe push rod mechanism.

[0012] The push rod body is rotationally connected with the brake shoe holder through the side wall surface of the brake box.

[0013] The cantilever beam is fixedly arranged on the outer wall surface of the brake box.

[0014] The swing arm is rotationally connected with the overhanging end of the cantilever beam and rotationally connected with the brake shoe carrier;

[0015] The brake shoe carrier is fixedly connected with the brake shoe.

[0016] Further, the brake shoe push rod mechanism comprises a tail fixed part and a push rod body moving part arranged in sequence in a direction perpendicular to the center line of the brake box;

[0017] The brake box is provided with a protruding structure corresponding to the tail fixed part; the tail fixed part is fixedly arranged inside the protruding structure; a first bearing set is fixedly arranged on the tail fixed part;

[0018] A second bearing set is arranged on the push rod body moving part; the second bearing set is fixedly connected with the push rod body; the first bearing set and the second bearing set jointly form a wedge-shaped piston guide structure; the small head of the wedge-shaped piston is inserted between the first bearing set and the second bearing set; when the wedge-shaped piston moves along the center line of the brake box, the push rod body moving part can be made to approach or move away from the first bearing set through the second bearing set, thereby realizing that the push rod body on the brake shoe push rod mechanism can move in a direction perpendicular to the center line of the brake box, so that the push rod body is rotationally connected with the brake shoe carrier through the side wall surface of the brake box;

[0019] A third return spring is arranged between the second bearing set and the side wall surface of the brake box, and the third return spring is sleeved on the push rod body;

[0020] The two ends of the first return spring are respectively fixedly connected with the large head of the wedge-shaped piston and the push rod body moving part.

[0021] Further, the elastic push rod comprises a movable upper cover, a base, a first spring, and a second return spring;

[0022] The electromagnetic push rod of the electromagnetic head is fixedly connected with the top of the movable upper cover;

[0023] The side wall surface of the base is provided with a movable upper cover guide rod at the top;

[0024] The movable upper cover is provided with a guide hole corresponding to the movable upper cover guide rod;

[0025] The movable upper cover guide rod is provided with an elastic retainer; the movable upper cover moves along the movable upper cover guide rod through the guide hole between the elastic retainer and the top of the side wall surface of the base;

[0026] The two ends of the first spring are respectively fixedly connected with the bottom of the movable upper cover and the bottom surface of the base;

[0027] The inner wall surface of the coupling seat is fixedly provided with a return spring supporting structure coaxial with the coupling seat; the return spring supporting structure comprises a supporting bottom surface and a supporting side surface; the inner wall surface of the coupling seat, the supporting bottom surface and the supporting side surface jointly form a mounting groove with the supporting bottom surface as the bottom surface; the two ends of the second return spring are fixedly connected with the bottom of the movable upper cover and the top of the supporting bottom surface, respectively;

[0028] The bottom of the base abuts against the large head of the wedge-shaped piston.

[0029] Further, the elastic push rod comprises an outer sleeve top cover, an inner sleeve base and a second spring.

[0030] The top surface of the outer sleeve top cover is provided with an electromagnetic push rod passing hole; the inner part of the side wall surface of the outer sleeve top cover is provided with a second elastic stop ring.

[0031] The side wall surface of the inner sleeve base is fixedly provided with a connecting plate in sliding connection with the inner part of the side wall surface of the outer sleeve top cover; the connecting plate slides between the top surface of the outer sleeve top cover and the second elastic stop ring.

[0032] The two ends of the second spring are fixedly connected with the top surface of the outer sleeve top cover and the bottom surface of the inner sleeve base, respectively; the electromagnetic push rod of the electromagnetic head is fixedly connected with the bottom surface of the inner sleeve base through the electromagnetic push rod passing hole.

[0033] Further, the first return spring is a coil spring.

[0034] Beneficial effects: the electromagnetic tread brake of the present application applies force to the elastic push rod through the electromagnetic push rod of the electromagnetic head, the elastic push rod pushes the wedge-shaped piston to make the push rod body of the brake shoe push rod mechanism (6) drive the brake shoe to move, so that the brake shoe fixed to the brake shoe carrier contacts the moving part to realize braking. The present application can conveniently realize the braking of the moving part when the equipment is not equipped with a gas source system. Meanwhile, the present application adopts electromagnetic force and spring force for driving, which is fast in response and high in safety factor. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 It is a whole structure schematic view of the electromagnetic tread brake of the present application.

[0037] Figure 2Whole external schematic diagram in specific embodiment 1 of the present application;

[0038] Figure 3 Electromagnetic push rod structure schematic diagram in specific embodiment 1 of the present application;

[0039] Figure 4 Whole structure schematic diagram of electromagnetic tread brake in specific embodiment 2 of the present application;

[0040] Figure 5 Electromagnetic push rod structure schematic diagram in specific embodiment 2 of the present application;

[0041] Figure 6 Whole external schematic diagram in specific embodiment 2 of the present application;

[0042] Figure 7 Wedge-shaped piston wedge angle force amplification principle diagram in the embodiment of the present application.

[0043] Wherein, 1, electromagnetic head; 2, coupling seat; 21, support bottom surface; 22, support side surface; 3, brake box; 31, convex structure; 4, elastic push rod; 41, upper cover; 411, guide hole; 42, base; 43, movable upper cover guide rod; 431, elastic retainer; 44, first spring; 45, second return spring; 46, outer sleeve top cover; 461, electromagnetic push rod through hole; 463, second elastic retainer; 47, inner sleeve base; 471, connecting plate; 49, second spring; 5, wedge-shaped piston; 6, brake shoe push rod mechanism; 61, push rod main body; 62, tail fixed part; 63, push rod main body moving part; 64, first bearing set; 65, second bearing set; 66, third return spring; 7, brake shoe carrier; 71, brake shoe; 8, swing arm; 9, cantilever beam; 10, first return spring. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] The present embodiment introduces a kind of electromagnetic tread brake, as shown in Figures 1-7 It includes electromagnetic head 1, coupling seat 2, brake box 3, elastic push rod 4, wedge-shaped piston 5, brake shoe push rod mechanism 6, brake shoe carrier 7, swing arm 8, cantilever beam 9;

[0046] The electromagnetic head 1 is fixedly connected with the end surface of the connecting seat 2, so that the electromagnetic push rod of the electromagnetic head 1 can reciprocate along the axis direction of the connecting seat inside the connecting seat 2;

[0047] The electromagnetic push rod of the electromagnetic head 1 is fixedly connected with the elastic push rod 4; the elastic push rod 4 can reciprocate along the inner wall surface of the connecting seat 2 in the axis direction of the connecting seat 2 along with the reciprocating movement of the electromagnetic push rod in the axis direction of the connecting seat 2;

[0048] The wedge-shaped piston 5 and the brake shoe push rod mechanism 6 are arranged inside the brake box 3; the brake box 3 is fixedly connected with the side of the connecting seat 2 away from the connecting electromagnetic head;

[0049] The other end of the elastic push rod 4 is in abutment with the large head of the wedge-shaped piston 5;

[0050] The small head of the wedge-shaped piston 5 is connected with the brake shoe push rod mechanism 6; when the elastic push rod 4 reciprocates in the center line direction of the connecting seat 2, the wedge-shaped piston 5 moves along the center line direction of the brake box 3, so that the push rod body 61 on the brake shoe push rod mechanism 6 can move along the direction perpendicular to the center line of the brake box 3;

[0051] A first return spring 10 is arranged between the large head of the wedge-shaped piston 5 and the brake shoe push rod mechanism 6;

[0052] The push rod body 61 is rotationally connected with the brake shoe carrier 7 through the side wall surface of the brake box 3;

[0053] The cantilever beam 9 is fixedly arranged on the outer wall surface of the brake box 3;

[0054] The swing arm 8 is arranged on the brake shoe carrier 7; the swing arm 8 is rotationally connected with the overhanging end of the cantilever beam 9; the swing arm 8 is rotationally connected with the brake shoe carrier 7;

[0055] The brake shoe carrier 7 is fixedly connected with the brake shoe 71.

[0056] Preferably, the brake shoe push rod mechanism 6 includes a tail fixed part 62 and a push rod body moving part 63 arranged in sequence in the direction perpendicular to the center line of the brake box 3;

[0057] The brake box 3 is provided with a protruding structure 31 corresponding to the tail fixed part 62; the tail fixed part 62 is fixedly arranged inside the protruding structure 31; the first bearing set 64 is fixedly arranged on the tail fixed part 62; so that the first bearing set 64 is fixed relative to the brake box;

[0058] The second bearing set 65 is arranged on the push rod body moving part 63; the second bearing set 65 is fixedly connected with the push rod body; the first bearing set 64 and the second bearing set 65 jointly form a wedge-shaped piston guide structure, the small head of the wedge-shaped piston is inserted between the first bearing set 64 and the second bearing set 65, when the wedge-shaped piston 5 moves along the center line of the brake box 3, the push rod body moving part 63 can be made close to or away from the first bearing set 64 through the second bearing set 65, and then the push rod body 61 on the brake shoe push rod mechanism 6 can move along the direction perpendicular to the center line of the brake box 3.

[0059] The third return spring 66 is arranged between the second bearing set 65 and the side wall surface of the brake box 3 and sleeved on the push rod body 61.

[0060] Specifically, in the embodiment, the second bearing set 65 and the push rod body 61 are fixedly connected through the mounting bracket; the mounting bracket is sleeved on the outside of the push rod body and fixed in the brake box to provide support for the push rod body moving part; the mounting bracket is a toothed sleeve with a toothed structure on the inner wall surface, which can ensure that the push rod body does not rotate during movement; the third return spring 66 is arranged between the toothed sleeve and the side wall surface of the brake box, when the brake needs to be released, due to the action of the spring force, the side of the third return spring connected with the side wall surface of the brake box does not change its position, therefore, the side of the third return spring connected with the second bearing set is close to the first bearing set under the action of the spring force, and the wedge-shaped piston is pushed upward.

[0061] In the embodiment, the brake shoe gap automatic adjustment mechanism can restore the normal brake shoe gap without being affected by the elastic deformation of the brake and the bogie. It can accurately adjust the gap between the brake shoe and the wheel tread. In addition, when the push rod body moving part 63 is close to or away from the first bearing set 64, it is realized through a conventional slide or roller structure, which will not be described in detail here.

[0062] The two ends of the first return spring 10 are respectively fixedly connected with the big head of the wedge-shaped piston 5 and the push rod body moving part 63.

[0063] Specifically, the electromagnetic head in the embodiment is a prior art product in the field. When the electromagnetic head is powered, the electromagnetic head drives the electromagnetic push rod inside the electromagnetic head to extend or retract through electromagnetic force, thereby providing power for braking of the brake. The electromagnetic head controller rectifies the external power supply, adjusts the output of voltage and current, and then controls the output force of the electromagnetic head. The electromagnetic head is connected to the brake box through the connecting seat 2. The head of the electromagnetic head 1 is fixedly connected to the end face of the connecting seat 2 through a bolt. The elastic push rod can extend, retract and move in the connecting seat under the action of the force applied by the elastic push rod of the electromagnetic head. The wedge-shaped piston 5 and the brake shoe push rod mechanism 6 are arranged inside the brake box 3. The push rod body 61 on the brake shoe push rod mechanism 6 is connected to the brake shoe carrier. The brake shoe carrier 7 is provided with a swing arm 8. The swing arm is rotatably connected to the cantilever beam 9 arranged on the outer wall surface of the brake box 3. The brake shoe carrier 7 is used for mounting the brake shoe.

[0064] Preferably, the elastic push rod 4 comprises a movable upper cover 41, a base 42, a first spring 44 and a second return spring 45.

[0065] The electromagnetic push rod of the electromagnetic head 1 is fixedly connected to the top of the movable upper cover 41.

[0066] The side wall surface of the base 42 is provided with a movable upper cover guide rod 43 at the top.

[0067] The movable upper cover 41 is provided with a guide hole 411 corresponding to the movable upper cover guide rod 43.

[0068] The movable upper cover guide rod 43 is provided with an elastic stop ring 431 for preventing the movable upper cover from being separated from the movable upper cover guide rod and causing damage to the elastic push rod. The movable upper cover 41 moves along the movable upper cover guide rod 43 through the guide hole 411 between the elastic stop ring 431 and the top of the side wall surface of the base 42.

[0069] The two ends of the first spring 44 are fixedly connected to the bottom of the movable upper cover 41 and the bottom surface of the base 42, respectively.

[0070] The inner wall surface of the connecting seat 2 is fixedly provided with a return spring support structure coaxial with the connecting seat. The return spring support structure comprises a support bottom surface 21 and a support side surface 22. The inner wall surface of the connecting seat 2, the support bottom surface 21 and the support side surface 22 jointly form a mounting groove with the support bottom surface 21 as the bottom surface. The two ends of the second return spring 45 are fixedly connected to the bottom of the movable upper cover 41 and the top of the support bottom surface 21, respectively.

[0071] Specifically, the second return spring 45 is arranged between the outside of the guide hole 411 of the movable upper cover 41 and the return spring support structure 21, that is, the second return spring 45 is arranged outside the side wall surface of the base 42.

[0072] The bottom of the base 42 is in contact with the large end of the wedge-shaped piston 5.

[0073] Specific Implementation Method 1: The electromagnetic head is controlled by an electromagnetic head controller. When energized, the electromagnetic push rod of the electromagnetic head extends; when de-energized, the electromagnetic push rod retracts. The elastic push rod and the wedge piston are reset by the second return spring 45 and the first return spring 10, respectively. The connecting seat 2 connects the electromagnetic head and the brake housing, and provides a skeletal support for the elastic push rod, protecting its internal components. The movable cover of the electromagnetic push rod and the elastic push rod on the electromagnetic head is threadedly connected. The first spring 44 inside the elastic push rod has a certain initial stiffness. When the pressure applied by the electromagnetic head to the elastic push rod is greater than the initial spring force of the elastic push rod, the movable upper cover of the elastic push rod and the top of the electromagnetic push rod are compressed. The output force of the electromagnetic head is adjusted according to the change of the input pressure, thereby adjusting the magnitude of the reaction force on the electromagnetic push rod, ensuring that the electromagnetic push rod does not fail due to excessive reaction force, while ensuring sufficient output thrust. The wedge piston can amplify the input force and output it, pushing the brake shoe push rod of the brake shoe push rod mechanism 6 laterally, so that the brake shoe push rod mechanism 6 can move under the push of the wedge piston. The brake shoe push rod mechanism in this embodiment is a push rod mechanism with clearance adjustment, which can automatically adjust the clearance between the brake shoe and the wheel tread during braking, so that the clearance between the brake shoe and the wheel tread is stabilized within a certain value. The brake shoe push rod mechanism 6 is provided with a wedge. The piston movement guide structure ensures the linear movement of the wedge piston while reducing the frictional resistance of the wedge piston movement and minimizing input force loss. After braking, the second return spring 45 of the elastic push rod pushes the elastic push rod to the brake release position, the first return spring 10 of the wedge piston pushes the wedge piston to the brake release position, and the third return spring 66 in the brake shoe push rod mechanism 6 with clearance adjustment mechanism pushes the push rod body to the brake release position. The brake shoe push rod mechanism 6 is flexibly rotatably connected to the brake shoe support. This flexible connection ensures no internal interference force when the relative spatial positions of the brake shoe push rod mechanism 6 with clearance adjustment mechanism and the brake shoe support change, while also ensuring that the brake shoe push rod with clearance adjustment mechanism does not rotate. The brake shoe is installed on the brake shoe support, and the swing arm suspends the brake shoe support on the cantilever of the brake housing, while controlling the running trajectory of the brake shoe support.

[0074] When power is on, the electromagnetic push rod of the electromagnetic head pushes out, pushes the elastic push rod, the elastic push rod pushes the wedge-shaped piston to move down, the wedge-shaped piston is inserted into the wedge surface of the wedge-shaped piston guide mechanism, the lateral size of the wedge surface gradually increases, the brake shoe push rod mechanism 6 of the gap adjustment mechanism is pushed to move forward, at this time, the amplification of the input pressure is completed, and the brake shoe push rod is pushed, the brake shoe push rod drives the brake shoe holder to extend, the brake shoe holder drives the brake shoe to move forward to press the wheel tread, and the brake is generated; when power is off, the pushing force of the electromagnetic push rod disappears, the elastic push rod is pushed back through a plurality of return springs, the electromagnetic head push rod is retracted, the wedge-shaped piston is retreated, the brake shoe push rod is retreated, the brake shoe holder is retreated, and the elastic push rod returns to the initial state, and the brake is released.

[0075] Preferably, the elastic push rod 4 comprises a sleeve top cover 46, an inner sleeve base 47, and a second spring 49;

[0076] The top surface of the sleeve top cover 46 is provided with an electromagnetic push rod passing hole 461; the inner surface of the side wall surface of the sleeve top cover 46 is provided with a second elastic stop ring 463;

[0077] The side wall surface of the inner sleeve base 47 is fixedly provided with a connecting plate 471 which is in sliding connection with the inner surface of the side wall surface of the sleeve top cover 46; the connecting plate 471 slides between the top surface of the sleeve top cover 46 and the second elastic stop ring 463;

[0078] Both ends of the second spring 49 are fixedly connected with the top surface of the sleeve top cover 46 and the bottom surface of the inner sleeve base 47; the electromagnetic push rod of the electromagnetic head 1 passes through the electromagnetic push rod passing hole 461 and is fixedly connected with the bottom surface of the inner sleeve base 47;

[0079] Specific embodiment 2: the electromagnetic head is controlled by the electromagnetic head controller, the electromagnetic push rod of the electromagnetic head retracts when the electromagnetic head is powered on, the electromagnetic push rod of the electromagnetic head and the bottom surface of the inner sleeve base 47 are threadedly connected, the elastic push rod is stretched, the elastic push rod is stretched to the brake release position, the wedge-shaped piston and the brake shoe push rod mechanism 6 are in the brake release position under the action of the return spring, and the brake is in the brake release state; when the electromagnetic head is powered off, the tension in the electromagnetic head disappears, the second spring 49 in the elastic push rod pushes the inner sleeve base of the elastic push rod out, the elastic push rod is elongated, the elastic push rod pushes the wedge-shaped piston downward, and at the same time, the elastic push rod is compressed according to the change of the input pressure to adjust the change of the output force, while ensuring that there is enough output thrust, the wedge-shaped piston moves downward under the guidance of the guide mechanism, the transverse size of the wedge surface of the wedge-shaped piston guide mechanism increases, the brake shoe push rod 61 of the brake shoe push rod mechanism 6 moves transversely and forward, at this time, the input pressure is amplified and the forward movement is completed, the brake shoe carrier is driven by the brake shoe push rod to extend, the brake shoe carrier drives the brake shoe to move forward and press the wheel tread, and braking is generated. The present application adopts electromagnetic force and spring force driving, has rapid response and high safety factor.

[0080] Specifically, the brake box body of the embodiment is integrally cast, and has good sealing performance and high strength.

[0081] Specifically, the wedge surface and the vertical surface of the wedge-shaped piston of the embodiment form a clamping foot, have the function of amplifying the input force, form a larger output force, the wedge-shaped piston moves under the pushing of the elastic push rod, pushes the push rod of the gap adjusting mechanism forward and backward, and amplifies the input force. The relationship between the output force amplification ratio and the wedge angle is shown in Figure 7 .

[0082] Specifically, the brake shoe push rod mechanism 6 of the embodiment has the function of automatically compensating the gap between the brake shoe and the vehicle tread. The brake shoe push rod of the brake shoe push rod mechanism 6 is flexibly connected with the brake shoe carrier, through the flexible connection, the relative spatial position change between the brake shoe push rod and the brake shoe carrier is ensured without internal interference force, at the same time, the brake shoe push rod is ensured not to rotate, and the brake shoe can better fit the wheel.

[0083] Specifically, the wedge-shaped piston moving guide mechanism of the embodiment is provided with a stainless steel sleeve inside the box body, and a roller is used to support the wedge leg moving position, so that the wedge-shaped piston moves linearly without deviation.

[0084] Preferably, the first return spring 10 is a coil spring.

[0085] Specifically, due to the first return spring for resetting the wedge-shaped piston, due to the shift of the axis of the first return spring when the push rod main body moving part 63 moves transversely relative to the tail fixed part due to the movement of the wedge-shaped piston, in order to ensure that the first return spring can work stably, the present embodiment adopts a tower spring.

[0086] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electromagnetic tread brake, characterized by The utility model relates to a brake device, including electromagnetic head (1), coupling seat (2), brake box (3), elastic push rod (4), wedge piston (5), brake shoe push rod mechanism (6), brake shoe holder (7), swing arm (8), cantilever beam (9); The electromagnetic head (1) is fixedly connected with the coupling seat (2), so that the electromagnetic push rod of the electromagnetic head (1) can reciprocate along the axis direction of the coupling seat inside the coupling seat (2); The electromagnetic push rod of the electromagnetic head (1) is fixedly connected with the elastic push rod (4), and the elastic push rod (4) reciprocates along the inner wall surface of the coupling seat (2) in the axis direction of the coupling seat (2); The wedge piston (5) and the brake shoe push rod mechanism (6) are arranged in the inside of the brake box (3), and the brake box (3) is fixedly connected with the side of the coupling seat (2) away from the electromagnetic head; The other end of the elastic push rod (4) abuts against the big head of the wedge piston (5); The small head of the wedge piston (5) is connected with the brake shoe push rod mechanism (6), when the elastic push rod (4) reciprocates along the center line direction of the coupling seat (2), the wedge piston (5) moves along the center line of the brake box (3), so that the push rod body (61) on the brake shoe push rod mechanism (6) can move along the direction perpendicular to the center line of the brake box (3); The first return spring (10) is arranged between the big head of the wedge piston (5) and the brake shoe push rod mechanism (6); The push rod body (61) is rotationally connected with the brake shoe holder (7) through the side wall surface of the brake box (3); The cantilever beam (9) is fixedly arranged on the outer wall surface of the brake box (3); The swing arm (8) is arranged on the brake shoe holder (7), and the swing arm (8) is rotationally connected with the overhanging end of the cantilever beam (9) and the brake shoe holder (7); The brake shoe holder (7) is fixedly connected with the brake shoe (71).

2. An electromagnetic face brake according to claim 1, wherein The brake shoe push rod mechanism (6) comprises a tail fixed part (62) and a push rod body moving part (63) arranged in sequence in the direction perpendicular to the center line of the brake box (3); The brake box (3) is provided with a protruding structure (31) corresponding to the tail fixed part (62), the tail fixed part (62) is fixedly arranged in the inside of the protruding structure (31), and the first bearing group (64) is fixedly arranged on the tail fixed part (62); The second bearing group (65) is provided on the push rod body moving part (63); the second bearing group (65) is fixedly connected with the push rod body (61); the first bearing group (64) and the second bearing group (65) jointly form a wedge-shaped piston guide structure, a small head of the wedge-shaped piston is inserted between the first bearing group (64) and the second bearing group (65), when the wedge-shaped piston (5) moves along the center line of the brake box (3), the push rod body moving part (63) can be made to approach or move away from the first bearing group (64) through the second bearing group (65), and then the push rod body (61) on the brake shoe push rod mechanism (6) can move in a direction perpendicular to the center line of the brake box (3), so that the push rod body (61) is connected in rotation with the brake shoe carrier (7) through the side wall surface of the brake box (3); The second bearing group (65) and the side wall surface of the brake box (3) are provided with a third return spring (66) sleeved on the push rod body (61); Both ends of the first return spring (10) are fixedly connected with the big head of the wedge-shaped piston (5) and the push rod body moving part (63) respectively.

3. An electromagnetic face brake according to claim 1, wherein The elastic push rod (4) comprises a movable upper cover (41), a base (42), a first spring (44) and a second return spring (45); The electromagnetic push rod of the electromagnetic head (1) is fixedly connected with the top of the movable upper cover (41); The side wall surface of the base (42) is provided with a movable upper cover guide rod (43) at the top; The movable upper cover (41) is provided with a guide hole (411) corresponding to the movable upper cover guide rod (43); The movable upper cover guide rod (43) is provided with an elastic retainer (431); the movable upper cover (41) moves along the movable upper cover guide rod (43) through the guide hole (411) between the elastic retainer (431) and the top of the side wall surface of the base (42); Both ends of the first spring (44) are fixedly connected with the bottom of the movable upper cover (41) and the bottom surface of the base (42) respectively; The inner wall surface of the coupling seat (2) is fixedly provided with a return spring support structure coaxial with the coupling seat; the return spring support structure comprises a support bottom surface (21) and a support side surface (22); the inner wall surface of the coupling seat (2), the support bottom surface (21) and the support side surface (22) jointly form a mounting groove with the support bottom surface (21) as the bottom surface; both ends of the second return spring (45) are fixedly connected with the bottom of the movable upper cover (41) and the top of the support bottom surface (21) respectively; The bottom of the base (42) abuts against the big head of the wedge-shaped piston (5).

4. An electromagnetic face brake according to claim 1, wherein The elastic push rod (4) comprises an outer sleeve top cover (46), an inner sleeve base (47) and a second spring (49); The top surface of the outer sleeve top cover (46) is provided with an electromagnetic push rod passing hole (461); the inner side wall surface of the outer sleeve top cover (46) is provided with a second elastic retainer (463); The side wall surface of the inner sleeve base (47) is fixedly provided with a connecting plate (471) in sliding connection with the inner surface of the side wall surface of the outer sleeve top cover (46); the connecting plate (471) slides between the top surface of the outer sleeve top cover (46) and the second elastic stop ring (463); Both ends of the second spring (49) are fixedly connected with the top surface of the outer sleeve top cover (46) and the bottom surface of the inner sleeve base (47); the electromagnetic push rod of the electromagnetic head (1) is fixedly connected with the bottom surface of the inner sleeve base (47) through the electromagnetic push rod passing hole (461).

5. An electromagnetic face brake according to claim 1, wherein The first return spring (10) is a tower spring.

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