Compact electromagnetic power-off brake with automatic compensation function

Abstract

The utility model discloses a compact type electromagnetic power-off brake with an automatic compensation function. The compact type electromagnetic power-off brake comprises two symmetrically-arranged brake arms, an installation shell, a power mechanism, a control mechanism and a reset mechanism. The installation shell is arranged in a rectangular column shell shape, one end of the installation shell is provided with a supporting plate protruding out of the top end of the installation shell, and the other end of the installation shell is open and connected with two brake arm pin shafts stretching into the installation shell. The power mechanism is arranged at the top end of the supporting plate and on the outer side wall of the supporting plate, the power mechanism is connected with one end of the control mechanism, and the other end of the control mechanism extends into the position between the two brake arms and controls the distance between the ends of the two brake arms. And the reset mechanism is arranged in the mounting shell and is connected with the control mechanism so as to realize the reset action of the control mechanism. According to the utility model, the braking performance of the brake in the using process is effectively ensured not to be influenced, and the braking safety of equipment using the brake is improved.

Description

Technical Field

[0001] The utility model relates to the field of brakes, in particular to a compact electromagnetic power-loss brake with automatic compensation. Background Art

[0002] A brake is a device that decelerates, stops, or maintains a stopped state of moving parts (or moving machinery). It is a mechanical component that stops or decelerates moving parts in machinery. Commonly known as a brake or gate, it primarily consists of a frame, brake components, and an operating mechanism. Some brakes also feature an automatic adjustment mechanism for brake component clearance. To reduce braking torque and overall size, brakes are typically installed on the equipment's high-speed shaft. However, for larger equipment with higher safety requirements (such as mine hoists and elevators), they should be installed on the low-speed shaft closer to the working part. The industrial brake industry's downstream industries primarily include equipment manufacturing for lifting and conveying machinery, metallurgical equipment, mining equipment, construction machinery, wind and nuclear power equipment, and shipbuilding and offshore heavy industry. Benefiting from the revitalization and development of these industries, the industrial brake industry is poised for another round of sustained and healthy growth.

[0003] Patent No. ZL201220599446.7 discloses a pneumatic caliper brake, which uses pneumatic equipment to realize the movement of the brake shoe, thereby achieving the braking effect; however, the friction pad on the brake shoe will wear and become thinner after long-term use, so that the gap between the friction pad and the brake disc becomes larger, which affects the braking efficiency and braking effect of the brake, thereby affecting the operational safety of the brake using equipment, and it is necessary to improve it. Summary of the Invention

[0004] The utility model aims to solve the above problems and provide a compact electromagnetic power-loss brake with automatic compensation which has simple structure and is easy to use.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A compact electromagnetic power-loss brake with automatic compensation comprises two symmetrically arranged brake arms and a mounting shell, a power mechanism, a control mechanism, and a reset mechanism; the mounting shell is arranged in the shape of a rectangular column shell, one end of the mounting shell is provided with a support plate protruding from the top of the mounting shell, and the other end of the mounting shell is open and connected to two brake arm pins extending into the mounting shell; the power mechanism is arranged on the top of the support plate and on the outer side wall of the support plate, the power mechanism is connected to one end of the control mechanism, and the other end of the control mechanism extends between the two brake arms and controls the distance between the two brake arm ends; the reset mechanism is arranged in the mounting shell and connected to the control mechanism to realize the reset action of the control mechanism.

[0007] Furthermore, the mounting shell is fixedly connected to a fixing plate at the top of one end near the brake arm, and a first pin shaft hole is provided on the fixing plate, and the first pin shaft hole is connected to a second pin shaft hole provided in the middle of the brake arm through a first pin shaft; one end of the two brake arms is pin-connected to a brake shoe and the brake shoes on the two brake arms are arranged opposite to each other, and a tension spring is provided between the other ends of the two brake arms and under the action of the tension spring, the end heads of the two brake arms are made to abut against the control mechanism.

[0008] Furthermore, a pin shaft at one end of the brake arm close to the control mechanism is connected to a wear-resistant wheel, and an outer peripheral side wall of the wear-resistant wheel is in contact with the control mechanism.

[0009] Furthermore, one end of the brake shoe is connected to the brake arm pin, and the other side of the brake shoe is detachably connected to a friction plate.

[0010] Furthermore, the power mechanism includes an electromagnet, a power shaft, and a power lever; the electromagnet is located above the mounting shell and fixedly connected to one side of the support plate, a power shaft is provided in the electromagnet and can control the power shaft to move when the electromagnet is energized, one end of the power shaft passes through the outside of the support plate and abuts against the top of the power lever provided on the outside of the support plate; the middle part of the power lever is connected to the connecting ear pin shaft provided on the outside of the support plate, and the bottom end of the power lever abuts against the control mechanism.

[0011] Furthermore, the control mechanism includes a transmission shaft and a movable shell. The movable shell is arranged in the mounting shell and can slide along the length direction of the mounting shell. The movable shell is provided with inclined structures on both sides in the width direction and contacts the wear-resistant wheels at the ends of the two brake arms through the inclined structures. The inclined structure is thick on the side close to the brake shoe and thin on the side away from the brake shoe; one end of the transmission shaft is fixedly connected to the movable shell, the middle part of the transmission shaft is connected to the reset mechanism arranged in the mounting shell, and the other end of the transmission shaft extends to the outside of the support plate and under the elastic action of the reset mechanism, the end of the transmission shaft is ordered to abut against the bottom end of the power lever.

[0012] Furthermore, the reset mechanism includes a reset fixed plate, a reset movable plate, and a reset spring; the reset fixed plate is fixedly connected in the installation shell, and the reset movable plate is arranged between the reset fixed plate and the support plate and can be moved in the installation shell; a number of reset springs are arranged between the reset movable plate and the reset fixed plate; one end of the transmission shaft passes through the avoidance holes on the reset movable plate and the reset fixed plate in turn and is fixedly connected to the movable shell; the outer wall of the transmission shaft is threadedly connected to the inner wall of the avoidance hole on the reset movable plate.

[0013] Furthermore, a compensation mechanism for automatically compensating for the thickness of the inclined surface structure is provided in the movable shell; the compensation mechanism includes a one-way bearing, a shift rod, a threaded sleeve, and a positioning shaft; the top of the mounting shell is fixedly connected to a cover plate, and a first movable hole is provided on the cover plate; the threaded sleeve is arranged in the movable shell, and the axial direction of the threaded sleeve is consistent with the width direction of the movable shell, and the inner walls at both ends of the threaded sleeve are provided with internal threads and the internal threads of the inner walls at both ends rotate in opposite directions, and the inner walls at both ends of the threaded sleeve are respectively threadedly connected to the positioning shafts through the internal threads, and one end of the positioning shaft passes through the end wall of one end of the movable shell to form an inclined surface structure; a one-way bearing is fixedly sleeved in the middle of the threaded sleeve, and a shift rod is fixedly connected to the top end of the outer periphery of the one-way bearing, and the top end of the shift rod extends out from the second movable hole preset at the top of the movable shell and the first movable hole on the cover plate in turn.

[0014] Furthermore, guide limit blocks are fixedly connected to both side walls in the width direction of the movable shell, and a positioning notch is provided on one side of the inclined structure of the positioning shaft. The positioning notch is located on one side of the guide limit block and limits the rotation of the positioning shaft through the guide limit block.

[0015] Furthermore, a protective cover is bolted to the top of the cover plate, and the protective cover is arranged above the end of the shift rod and protects the shift rod.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are:

[0017] When the electromagnet is in a power-off state, the brake shoe is in a braking state; when the electromagnet is energized, the electromagnet drives the power shaft to move in the outer direction of the support plate and pushes the top end of the power lever to move together, and the bottom end of the power lever moves toward the brake shoe under the action of the lever and pushes the transmission shaft, the reset movable plate, and the movable housing to move together in the direction of the brake shoe. When the movable housing moves, one end of the two brake arms moves along the inclined structure under the action of the tension spring, and the other end of the two brake arms drives the brake shoe to move relatively away from each other under the action of the lever, thereby realizing the release operation of the brake; after the electromagnet is powered off, under the action of the reset spring, the reset movable plate, the transmission shaft, the power lever and the movable housing all return to their original positions, and the end of the brake arm in contact with the inclined structure moves in the opposite direction along the inclined structure again, causing the two brake shoes to move relatively close to each other under the action of the lever, thereby realizing the braking operation of the brake;

[0018] When the friction pads on the brake shoes are worn, the compensation mechanism and the control mechanism cooperate with each other to extend the positioning shafts on both sides of the compensation mechanism outward, thereby increasing the support distance of the two brake arms and making the brake shoes at one end of the two brake arms closer to each other, thereby making the distance between the friction pads on the two brake shoes consistent with the distance before wear, achieving consistency in the friction braking force, and ultimately achieving the wear compensation effect of the brake; it effectively ensures that the braking performance of the brake is not affected during use, avoids the situation where the friction pad wear affects the braking efficiency and braking effect of the brake, improves the braking safety of the brake-using equipment, and has excellent market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a longitudinal sectional view of the utility model;

[0022] Figure 3 It is a transverse cross-sectional view of the utility model;

[0023] Figure 4 This is the connection structure diagram of the power mechanism;

[0024] Figure 5 It is a connection structure diagram of the reset mechanism;

[0025] Figure 6 It is the connection structure diagram of the control mechanism;

[0026] Figure 7 This is the connection structure diagram of the brake arm;

[0027] Figure 8 This is a structural diagram of the compensation mechanism;

[0028] Figure 9 This is a cross-sectional structural diagram of the compensation mechanism. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the scope of protection of the present invention.

[0030] like Figures 1 to 9 As shown, this embodiment discloses a compact electromagnetic power-loss brake with automatic compensation, including two symmetrically arranged brake arms 1 and a mounting shell 2, a power mechanism, a control mechanism, and a reset mechanism 6; the mounting shell 2 is arranged in the shape of a rectangular column shell with an open top and right side, and the left end of the mounting shell 2 is provided with a support plate 201 protruding from the top of the mounting shell, and the right end of the mounting shell 2 is open and connected to the two brake arms 1 extending into the mounting shell 2 by pins; the power mechanism is arranged on the top of the support plate 201 and on the outer wall of the support plate 201, the power mechanism is connected to one end of the control mechanism, and the other end of the control mechanism extends between the two brake arms 1 and controls the distance between the left ends of the two brake arms 1; the reset mechanism 6 is arranged in the mounting shell 2 and connected to the control mechanism to realize the reset action of the control mechanism.

[0031] The mounting shell 2 is fixedly connected to the top of one end close to the brake arm 1 with a fixing plate 204, and a first pin hole 2041 is provided on the fixing plate 204, and the first pin hole 2041 is connected to the second pin hole provided in the middle of the brake arm 1 through a first pin; the right ends of the two brake arms 1 are pin-connected to the brake shoes 101 and the brake shoes 101 on the two brake arms 1 are arranged opposite to each other, and the left ends of the two brake arms 1 are pin-connected to the wear-resistant wheels 103. At the same time, a tension spring 104 is also connected between the inner walls of the left ends of the two brake arms 1, and under the action of the tension spring 104, the outer peripheral side walls of the wear-resistant wheels 103 on the two brake arms 1 are made to contact with the control mechanism.

[0032] One end of the brake shoe 101 is pin-connected to the brake arm 1 , and the other side of the brake shoe 101 is detachably connected to the friction plate 102 .

[0033] In this design structure, one end of the brake arm abuts against both sides of the control mechanism under the action of the tension spring, and the other end of the brake arm drives the brake shoe and friction plate to perform braking operation when in action; when the distance between the left ends of the two brake arms becomes larger, the distance between the brake shoes at the right end position will become smaller accordingly, realizing the clamping braking effect of the two brake shoes on the brake disc.

[0034] The power mechanism includes an electromagnet 3, a power shaft 302, and a power lever 4; the electromagnet 3 is located above the mounting shell 2 and is fixedly connected to one side of the support plate 201. A power shaft 302 is provided in the electromagnet 3, and a magnetic plate 301 is fixedly connected to the right end of the power shaft 302. The magnetic plate 301 can move to the left when the electromagnet 3 is energized and drive the power shaft 302 to move at the same time. One end of the power shaft 302 passes through the outside of the support plate 201 and abuts against the top of the power lever 4 set on the outside of the support plate 201; the middle part of the power lever 4 is pin-connected to the connecting ear 2011 set on the outside of the support plate 201, and the bottom end of the power lever 4 abuts against the control mechanism; the outside of the support plate 201 is fixedly connected to a protective shell 203 and the power lever 4 is protected and shielded by the protective shell 203.

[0035] The control mechanism includes a transmission shaft 5 and a movable shell 7. The movable shell 7 is arranged in the mounting shell 2 and can slide along the length direction of the mounting shell 2. The movable shell 7 is provided with an inclined surface structure 8041 on both sides in the width direction and contacts the wear-resistant wheels 103 at the ends of the two brake arms 1 through the inclined surface structure 8041. The inclined surface structure 8041 is thick on the side close to the brake shoe 101 and thin on the side away from the brake shoe 101; one end of the transmission shaft 5 is fixedly connected to the movable shell 7 by a bolt structure, the middle part of the transmission shaft 5 is connected to the reset mechanism 6 arranged in the mounting shell 2, and the other end of the transmission shaft 5 extends to the outside of the support plate 201 and is ordered to abut the bottom end of the power lever 4 under the elastic action of the reset mechanism 6.

[0036] When the electromagnet is energized, the power shaft fixedly connected to the magnetic plate will move to the left under the driving action of the magnetic plate and make the top of the power lever move to the left. Under the action of the lever, the bottom end of the power lever moves to the right and drives the transmission shaft in the control mechanism to move to the right. When the transmission shaft moves to the right, the movable shell and the inclined surface structure move to the right together, causing the wear-resistant wheel to roll along the inclined surface structure. Due to the thickness deviation of the inclined surface structure, when the inclined surface structure moves to the right, the distance between the two wear-resistant wheels becomes smaller, thereby increasing the distance between the two brake shoes, achieving the brake releasing effect. It has a simple structure, clever coordination, and better structural compactness, which reduces the space occupied by the entire brake and further improves the use effect of the present utility model.

[0037] The reset mechanism 6 includes a reset fixed plate 601, a reset movable plate 603, and a reset spring 602; the reset fixed plate 601 is fixedly connected to the mounting shell 2, and the reset movable plate 603 is arranged between the reset fixed plate 601 and the support plate 201 and can be moved within the mounting shell 1; a number of reset springs 602 are arranged between the reset movable plate 603 and the reset fixed plate 601; one end of the transmission shaft 5 passes through the avoidance holes on the reset movable plate 603 and the reset fixed plate 601 in turn and is fixedly connected to the movable shell 7; the outer wall of the transmission shaft 5 is threadedly connected to the inner wall of the avoidance hole on the reset movable plate 603.

[0038] The transmission shaft is a screw structure, one end of which is connected to a movable housing, and the middle part passes through the reset fixed plate and is threadedly connected to the reset movable plate, and contacts the bottom end of the power lever after passing through the support plate; the elastic force of the reset spring is transmitted to the transmission shaft through the reset movable plate, so that the end of the transmission shaft abuts against the power lever, and at the same time, the power lever abuts against the power shaft under the thrust of the transmission shaft; when the electromagnet is energized, the transmission shaft and the movable housing move to the right, and the reset movable plate moves to the right together with the transmission shaft and squeezes the reset spring to achieve the release effect of the brake; after the electromagnet is de-energized, the transmission shaft, movable housing and power lever are restored to their original positions under the action of the reset spring, thereby achieving the braking effect of the brake;

[0039] In addition, the threaded connection position between the transmission shaft and the reset movable plate can be changed by rotating the transmission shaft, thereby adjusting the elastic preload force of the reset spring. The adjustment operation is convenient and quick, further improving the use effect of the utility model.

[0040] The movable shell 7 is provided with a compensation mechanism 8 for automatically compensating the thickness of the inclined surface structure 8041; the compensation mechanism 8 includes a one-way bearing 802, a lever 801, a threaded sleeve 803, and a positioning shaft 804; the top of the mounting shell 2 is fixedly connected to a cover plate 202, and the cover plate 202 is provided with a first movable hole 2021; the threaded sleeve 803 is provided in the movable shell 7, and the axial direction of the threaded sleeve 803 is consistent with the width direction of the movable shell 7, and the inner walls at both ends of the threaded sleeve 803 are provided with internal threads, and the internal threads of the inner walls at both ends are rotated in opposite directions, and the two ends of the threaded sleeve 803 are fixedly connected to the top of the mounting shell 2 The inner wall of the end is threadedly connected with a positioning shaft 804 through an internal thread, and one end of the positioning shaft 804 passes through the end wall of the movable shell 7 and forms an inclined structure 8041; a one-way bearing 802 is fixedly sleeved on the outer side of the middle part of the threaded sleeve 803, and a shift rod 801 is fixedly connected to the top end of the one-way bearing 802. The top end of the shift rod 801 extends out from the second movable hole 701 preset at the top of the movable shell 7 and the first movable hole 2021 on the cover plate 202 in turn. The top end of the cover plate 202 is bolted with a protective cover 2022. The protective cover 2022 is arranged above the end of the shift rod 801 and protects the shift rod 801.

[0041] The movable shell 7 is fixedly connected to the side walls on both sides in the width direction with a guide limit block 805. A positioning notch 8042 is provided on one side of the inclined structure 8041 of the positioning shaft 804. The positioning notch 8042 is located on one side of the guide limit block 805 and limits the rotation of the positioning shaft 804 through the guide limit block 805.

[0042] After the friction plates on the brake shoes are worn, the distance between the two brake shoes can be closer, and the distance between the two wear-resistant wheels can be larger; when the electromagnet is de-energized, under the elastic action of the return spring, the movable housing moves to the left a greater distance, the shift lever touches the left end wall of the first movable hole and causes the one-way bearing to rotate clockwise; at this time, the one-way bearing rotates relative to the threaded sleeve, the threaded sleeve does not rotate, and the two positioning shafts do not move;

[0043] When the electromagnet is energized, the movable housing moves to the right under the action of the transmission shaft. At this time, the rotating lever touches the right end wall of the first movable hole and causes the one-way bearing to rotate counterclockwise. The one-way bearing drives the threaded sleeve to rotate. After the threaded sleeve rotates, the two positioning shafts are moved to the outside of the movable housing under the action of the thread. After the two positioning shafts move, the distance between the two brake shoes can be closer during braking, thereby ensuring the braking effect after the friction pads on the brake shoes are worn.

[0044] After the two positioning shafts have moved and compensated, the lever will reciprocate in the first movable hole and the second movable hole again, and its movable distance is consistent with the length of the first movable hole. After waiting for the friction plate to wear again, the movable distance of the lever will increase with the movable shell, and the lever will touch the end wall of the first movable hole again, and then the above action will be repeated again to achieve constant maintenance of the braking effect of the brake, thereby effectively improving the use effect of the brake.

[0045] When the electromagnet is in a power-off state, the brake shoe is in a braking state; when the electromagnet is energized, the electromagnet drives the power shaft to move in the outer direction of the support plate and pushes the top end of the power lever to move together, and the bottom end of the power lever moves toward the brake shoe under the action of the lever and pushes the transmission shaft, the reset movable plate, and the movable housing to move together in the direction of the brake shoe. When the movable housing moves, one end of the two brake arms moves along the inclined structure under the action of the tension spring, and the other end of the two brake arms drives the brake shoe to move relatively away from each other under the action of the lever, thereby realizing the release operation of the brake; after the electromagnet is powered off, under the action of the reset spring, the reset movable plate, the transmission shaft, the power lever and the movable housing all return to their original positions, and the end of the brake arm in contact with the inclined structure moves in the opposite direction along the inclined structure again, causing the two brake shoes to move relatively close to each other under the action of the lever, thereby realizing the braking operation of the brake;

[0046] When the friction pads on the brake shoes are worn, the compensation mechanism and the control mechanism cooperate with each other to extend the positioning shafts on both sides of the compensation mechanism outward, thereby increasing the support distance of the two brake arms and making the brake shoes at one end of the two brake arms closer to each other, thereby making the distance between the friction pads on the two brake shoes consistent with the distance before wear, achieving consistency in the friction braking force, and ultimately achieving the wear compensation effect of the brake; it effectively ensures that the braking performance of the brake is not affected during use, avoids the situation where the friction pad wear affects the braking efficiency and braking effect of the brake, improves the braking safety of the brake-using equipment, and has excellent market promotion value.

Claims

1. A compact electromagnetic brake with automatic compensation for power failure, comprising two symmetrically arranged brake arms; characterized in that: The compact electromagnetic power-loss brake with automatic compensation also includes an installation shell, a power mechanism, a control mechanism, and a reset mechanism; the installation shell is arranged in the shape of a rectangular column shell, and one end of the installation shell is provided with a support plate protruding from the top of the installation shell, and the other end of the installation shell is opened and connected to two brake arm pins extending into the installation shell; the power mechanism is arranged on the top of the support plate and the outer side wall of the support plate, the power mechanism is connected to one end of the control mechanism, and the other end of the control mechanism extends between the two brake arms and controls the distance between the two brake arm ends; the reset mechanism is arranged in the installation shell and connected to the control mechanism to realize the reset action of the control mechanism.

2. The compact electromagnetic brake with automatic compensation for power loss according to claim 1, characterized in that: The mounting shell is fixedly connected to a fixing plate at the top of one end near the brake arm, and a first pin shaft hole is provided on the fixing plate, and the first pin shaft hole is connected to a second pin shaft hole provided in the middle of the brake arm through a first pin shaft; one end of the two brake arms is pin-connected to a brake shoe and the brake shoes on the two brake arms are arranged opposite to each other, and a tension spring is provided between the other ends of the two brake arms and under the action of the tension spring, the end heads of the two brake arms are made to abut against the control mechanism.

3. The compact electromagnetic brake with automatic compensation for power loss according to claim 2, characterized in that: The pin shaft at one end of the brake arm close to the control mechanism is connected with a wear-resistant wheel, and the outer peripheral side wall of the wear-resistant wheel is in contact with the control mechanism.

4. The compact electromagnetic brake with automatic compensation for power loss according to claim 2, characterized in that: One end of the brake shoe is connected to the brake arm pin shaft, and the other side of the brake shoe is detachably connected to a friction plate.

5. The compact electromagnetic brake with automatic compensation for power loss according to claim 1, characterized in that: The power mechanism includes an electromagnet, a power shaft, and a power lever; the electromagnet is located above the mounting shell and is fixedly connected to one side of the support plate. A power shaft is provided inside the electromagnet and can control the power shaft to move when the electromagnet is energized. One end of the power shaft passes through the outside of the support plate and abuts against the top of the power lever provided on the outside of the support plate; the middle part of the power lever is connected to the connecting ear pin shaft provided on the outside of the support plate, and the bottom end of the power lever abuts against the control mechanism.

6. The compact electromagnetic brake with automatic compensation for power loss according to claim 5, characterized in that: The control mechanism includes a transmission shaft and a movable shell. The movable shell is arranged in the mounting shell and can slide along the length direction of the mounting shell. Both sides of the movable shell in the width direction are provided with inclined structures and contact the wear-resistant wheels at the ends of the two brake arms through the inclined structures. The inclined structure is thick on the side close to the brake shoe and thin on the side away from the brake shoe. One end of the transmission shaft is fixedly connected to the movable shell, the middle part of the transmission shaft is connected to the reset mechanism arranged in the mounting shell, and the other end of the transmission shaft extends to the outside of the support plate and under the elastic action of the reset mechanism, the end of the transmission shaft is made to abut against the bottom end of the power lever.

7. The compact electromagnetic brake with automatic compensation for power loss according to claim 6, characterized in that: The reset mechanism includes a reset fixed plate, a reset movable plate, and a reset spring; the reset fixed plate is fixedly connected in the installation shell, and the reset movable plate is arranged between the reset fixed plate and the support plate and can move in the installation shell; a plurality of reset springs are arranged between the reset movable plate and the reset fixed plate; one end of the transmission shaft passes through the avoidance holes on the reset movable plate and the reset fixed plate in sequence and is fixedly connected to the movable shell; the outer wall of the transmission shaft is threadedly connected to the inner wall of the avoidance hole on the reset movable plate.

8. The compact electromagnetic brake with automatic compensation for power loss according to claim 6, characterized in that: A compensation mechanism for automatically compensating for the thickness of the inclined surface structure is provided in the movable shell; the compensation mechanism includes a one-way bearing, a shift rod, a threaded sleeve, and a positioning shaft; the top of the mounting shell is fixedly connected to a cover plate, and a first movable hole is provided on the cover plate; the threaded sleeve is provided in the movable shell, and the axial direction of the threaded sleeve is consistent with the width direction of the movable shell, and the inner walls at both ends of the threaded sleeve are provided with internal threads and the internal threads of the inner walls at both ends rotate in opposite directions, and the inner walls at both ends of the threaded sleeve are respectively threadedly connected to the positioning shafts through internal threads, and one end of the positioning shaft passes through one end wall of the movable shell and forms an inclined surface structure; a one-way bearing is fixedly sleeved in the middle of the threaded sleeve, and a shift rod is fixedly connected to the top end of the outer periphery of the one-way bearing, and the top end of the shift rod extends out from the second movable hole preset at the top of the movable shell and the first movable hole on the cover plate in turn.

9. The compact electromagnetic brake with automatic compensation for power loss according to claim 8, characterized in that: Guide limit blocks are fixedly connected to both side walls of the movable shell in the width direction, and a positioning notch is provided on one side of the inclined structure of the positioning shaft. The positioning notch is located on one side of the guide limit block and limits the rotation of the positioning shaft through the guide limit block.

10. The compact electromagnetic brake with automatic compensation for power loss according to claim 8, characterized in that: The top end of the cover plate is bolted to a protective cover, which is arranged above the end of the shifting rod and protects the shifting rod.

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