A new type of power-off disc brake with a disc release mechanism

Abstract

The present application relates to a novel power-off disc brake with a disc release mechanism, and relates to the technical field of lifting machinery and equipment, which includes a magnetic component, a fixing ring, an armature, a motor and a brake disc; the magnetic component is sleeved on the motor output shaft, and the magnetic component is connected to the motor, and there is an installation gap between the magnetic component and the motor output shaft; the armature is installed on one side of the magnetic component, and when the magnetic component is powered on, the armature moves toward the side close to the magnetic component, and when the magnetic component is powered off, the armature moves toward the side away from the magnetic component; the fixing ring is located in the installation gap, and the fixing ring is coaxially sleeved on the motor output shaft, the brake disc is coaxially sleeved on the motor output shaft, the brake disc is located between the armature and the motor end face, the fixing ring is located on the side of the brake disc away from the motor, and the brake disc is slidably connected to the fixing ring along the axial direction of the motor output shaft. The present application has the effect of reducing and avoiding the problem of the difficulty of the brake disc of the power-off disc brake being released.

Description

Technical Field

[0001] The present application relates to the technical field of lifting machinery and equipment, and in particular to a novel power-off disc brake with a disc release mechanism. Background Art

[0002] The working characteristics of elevators, lifting machinery and stage equipment are repeated short-term working and frequent braking. The brake plays the role of clamping workpieces, emergency braking and stopping in lifting operations, stage lifting and elevator operation. It is an important active safety device and is widely used.

[0003] Conventional power-off brakes consist of a yoke, excitation coil, spring, brake disc, armature, spline sleeve, mounting screws, etc. The brake is installed at the rear end of the flange (or motor) of the equipment; the drive shaft and spline sleeve are connected to the brake disc. When the excitation coil of the brake is connected to the rated voltage (DC), the electromagnetic force attracts the armature, causing the armature to separate (release) from the brake disc. At this time, the drive shaft operates or starts normally with the brake disc. When the transmission system is separated or powered off, the brake is also powered off at the same time. At this time, the spring applies pressure to the armature, forcing the friction torque between the brake disc, the armature and the flange to stop the drive shaft quickly.

[0004] In actual applications, it is often difficult for the brake disc to come off, causing problems such as loud noise, vibration, and severe heat, and even causing difficulty in starting, seriously affecting the normal operation of the equipment, and even bringing certain safety risks. Especially in the case of vertical installation of the brake equipment, the hardness of the brake disc friction material is relatively soft, and the brake disc and key sleeve are too tight, it is easy to have the problem of the brake disc coming off.

[0005] In view of the above problems and defects, in order to reduce and avoid the difficulty of brake disc detachment of power-off disc brakes in industries such as elevators, lifting machinery and stage equipment, and to reduce the failure rate and safety risks, the present invention proposes a new power-off disc brake with a disc detachment mechanism. Utility Model Content

[0006] In order to reduce and avoid the problem of disc disengagement of power-loosening disc brakes in industries such as elevators, lifting machinery and stage equipment, the present application provides a novel power-loosening disc brake with a disc disengagement mechanism.

[0007] The present application provides a novel power-off disc brake with a disc release mechanism, which adopts the following technical solution:

[0008] A novel power-off disc brake with a disc release mechanism comprises a magnetic attraction component, a fixing ring, an armature, a motor and a brake disc;

[0009] The magnetic attraction component is sleeved on the motor output shaft, and the magnetic attraction component is connected to the motor, and there is an installation gap between the magnetic attraction component and the motor output shaft;

[0010] The armature is installed on one side of the magnetic attraction component. When the magnetic attraction component is powered on, the armature moves toward the side close to the magnetic attraction component. When the magnetic attraction component is powered off, the armature moves toward the side away from the magnetic attraction component.

[0011] The fixing ring is located in the installation gap, and the fixing ring is coaxially sleeved on the motor output shaft, the brake disc is coaxially sleeved on the motor output shaft, the brake disc is located between the armature and the motor end face, the fixing ring is located on the side of the brake disc away from the motor, the brake disc is slidably connected to the fixing ring along the axial direction of the motor output shaft, a first sliding gap is defined between the brake disc and the fixing ring, and when the magnetic attraction assembly is energized, the brake disc slides toward the side away from the motor.

[0012] By adopting the above technical solution, when the braking device is installed vertically, when the coil is energized, due to the gravity of the brake itself, the brake will contact with the motor and generate friction, which will wear the brake and make it difficult for the brake and motor to detach. For this reason, by setting a fixed ring, when the magnetic suction component is energized, the armature moves toward the side close to the magnetic suction component, and the brake disc slides between the armature and the end face of the motor along the axial direction of the motor output shaft to disengage the brake disc from the motor end face, thereby reducing the friction generated between the brake disc and the motor end face, and further enabling the brake disc and the motor to detach.

[0013] Optionally, the magnetic attraction component includes a magnetic ring and a coil, the magnetic ring is coaxially sleeved on the motor output shaft, and the coil is installed on the magnetic ring.

[0014] By adopting the above technical solution, in order to adsorb the armature, the magnetic attraction component includes a magnetic ring and a coil. When the coil is energized, the electromagnetic force generated will adsorb the armature, and the armature will further separate from the brake disc, thereby realizing the rotation of the motor output shaft.

[0015] Optionally, the magnetic ring and the armature are connected to the motor via mounting bolts, and the armature is sleeved on the mounting bolts. When the coil is energized, the armature moves toward a side close to the coil, and when the coil is de-energized, the armature moves away from the coil.

[0016] By adopting the above technical solution, the magnetic ring and the armature are fixed to the motor through the mounting bolts, and when the coil is energized or de-energized, the armature can slide along the length direction of the mounting bolts.

[0017] Optionally, the brake disc includes a first braking part and a second braking part, the first braking part is coaxially fixedly connected with the second braking part, the outer diameter of the first braking part is larger than the outer diameter of the second braking part, the first braking part is located on the side of the second braking part away from the fixing ring, the first braking part is located between the armature and the motor end face, the second braking part is located between the motor end face and the fixing ring, a first sliding gap is provided between the second braking part and the fixing ring, and a second sliding gap is provided between the first braking part and the armature.

[0018] By adopting the above technical solution, by providing the first braking part and the second braking part, when the second braking part slides in the first sliding gap, it simultaneously drives the first braking part to slide in the second sliding gap, so that the second braking part is separated from the end face of the motor.

[0019] Optionally, it further comprises a connecting assembly for driving the brake disc to slide along the axial direction of the motor output shaft, wherein the connecting assembly comprises a fixing bolt and a first locking nut;

[0020] The fixing ring is provided with a first through hole along the axial direction of the motor output shaft, the fixing bolt is parallel to the axial direction of the motor output shaft, one end of the fixing bolt passes through the first through hole and is threadedly connected to the second braking part, and the fixing bolt slides in the first through hole along the axial direction of the motor output shaft;

[0021] The first locking nut is threadedly connected to the fixing bolt, and the first locking nut is located in the first sliding gap, and one end of the first locking nut abuts against the end wall of the brake disc.

[0022] By adopting the above technical solution, in order to drive the brake disc to slide along the axial direction of the motor output shaft, the fixing bolt is fixedly connected to the second braking part and is slidably connected to the fixing ring, so that the fixing bolt drives the first braking part and the second braking part to slide along the axial direction of the motor output shaft.

[0023] Optionally, the connecting assembly also includes an elastic member, which is sleeved on the fixing bolt, one end of the elastic member is pressed against an end wall of the fixing ring away from the second braking part, and the other end is pressed against a bolt head of the fixing bolt, and the elastic member has a force to drive the first braking part and the second braking part to move toward the side close to the fixing ring under recoverable deformation.

[0024] By adopting the above technical solution, by arranging an elastic part on the fixing bolt, when the coil is powered off, the armature moves toward the side close to the first braking part, and the first braking part is further completely clamped between the armature and the end face of the motor. At this time, the elastic part is in a compressed state. When the coil is powered on, the armature moves toward the side close to the coil. When the first braking part loses external force, the elastic part recovers from the compressed state to the normal state, and the first braking part and the second braking part are driven to move toward the side close to the fixing ring through the fixing bolt, thereby separating the first braking part from the motor.

[0025] Optionally, friction parts are fixedly connected to both sides of the first braking part. When the coil is powered off, one of the friction parts is pressed against the end surface of the motor, and the other friction part is pressed against the armature.

[0026] By adopting the above technical solution, when the coil is powered off, in order to increase the friction between the first braking part and the motor, thereby stopping the rotation of the motor output shaft, friction parts are connected on both sides of the first braking part so that the friction parts can increase the friction between the second braking part and the motor end face and the armature respectively.

[0027] Optionally, it further includes a limiting assembly, the limiting assembly includes a positioning bolt and a second locking nut, the fixing ring is penetrated by a second through hole along the axial direction of the motor output shaft, and one end of the positioning bolt passes through the second through hole and abuts against the end wall of the second braking portion;

[0028] The second locking nut is threadedly connected to the positioning bolt.

[0029] By adopting the above technical solution, in order to further reduce the friction between the friction part and the armature, a positioning bolt is provided, and the distance between one end of the positioning bolt and the second braking part is adjusted by screwing the second locking nut to ensure that when the second braking part slides along the axis of the motor output shaft toward the side close to the fixing ring, it is blocked by the positioning bolt and stops moving, so that there is a gap between the friction part on the first braking part and the armature, thereby reducing the wear on the friction part.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. In the present application, the brake disc is arranged to slide up and down along the axis direction of the motor output shaft, so that when the magnetic suction component is powered on, the brake disc can move away from the motor, thereby reducing the wear of the brake disc caused by the friction between the brake disc and the motor, and further enabling the brake disc to be smoothly separated from the motor;

[0032] 2. The present application sets a connection assembly. When the coil is powered off, the armature moves toward the brake disc, and the elastic member in the connection assembly is compressed. When the coil is powered on, the brake disc loses the external force applied by the armature, and the elastic member recovers from the compressed state to the normal state, thereby driving the brake disc to move away from the motor through the fixing bolt, thereby realizing the separation of the motor and the brake disc;

[0033] 3. The present application provides a limit assembly and adjusts the distance between the positioning bolt and the second braking part to ensure that there is a gap between the friction member and the armature, thereby reducing the friction between the friction member and the armature. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of the novel power-off disc brake with a disc release mechanism of the present application from the first perspective;

[0035] Figure 2 This is a second-angle overall structural diagram of the novel power-off disc brake with a disc release mechanism of the present application;

[0036] Figure 3 It is a cross-sectional view of the new power-loss disc brake;

[0037] Figure 4 yes Figure 3 A magnified view of part A;

[0038] Figure 5 yes Figure 3 Enlarged view of part B.

[0039] Explanation of the accompanying drawings: 1. Magnetic attraction component; 11. Magnetic ring; 12. Coil; 13. Mounting bolt; 131. Bushing; 14. Mounting gap; 2. Armature; 3. Fixing ring; 31. First through hole; 32. Second through hole; 4. Motor; 5. Brake disc; 51. First braking part; 511. Second sliding gap; 512. Friction member; 5121. First friction plate; 5122. Second friction plate; 5123. First limiting gap; 5124. Second limiting gap; 52. Second braking part; 521. First sliding gap; 6. Connecting component; 61. Fixing bolt; 62. First locking nut; 63. Elastic member; 7. Limiting component; 71. Positioning bolt; 72. Second locking nut. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-5 This application is described in further detail.

[0041] A novel power-off disc brake with a disc release mechanism is disclosed. Figure 1 and Figure 2The novel power-off disc brake with a disc release mechanism comprises a magnetic component 1, an armature 2, a fixing ring 3, a motor 4 and a brake disc 5. The magnetic component 1 is sleeved on the output shaft of the motor 4, and the magnetic component 1 is connected to one end face of the motor 4. There is an installation gap 14 between the magnetic component 1 and the output shaft of the motor 4. The armature 2 is installed on one side of the magnetic component 1. When the magnetic component 1 is powered on, an electromagnetic force is generated on the armature 2, and the armature 2 moves toward the side close to the magnetic component 1. When the magnetic component 1 is powered off, the armature 2 moves away from the magnetic component 1. One side of the component 1 moves, the fixing ring 3 is located in the installation gap 14, the fixing ring 3 is coaxially sleeved on the output shaft of the motor 4, the brake disc 5 is coaxially sleeved on the output shaft of the motor 4, and the brake disc 5 is located between the armature 2 and the end face of the motor 4, the fixing ring 3 is located on the side of the brake disc 5 away from the motor 4, the brake disc 5 is slidably connected to the fixing ring 3 along the axial direction of the output shaft of the motor 4, and a first sliding gap is provided between the brake disc 5 and the fixing ring 3. When the magnetic suction component 1 is energized, the brake disc 5 slides toward the side away from the motor 4.

[0042] Reference Figure 1 and Figure 3 The magnetic attraction component 1 includes a magnetic ring 11 and a coil 12. The coil 12 is installed on the magnetic ring 11, and the armature 2 is installed on the side of the magnetic ring 11 close to the coil 12, so that the coil 12 in the energized state attracts the armature 2. The magnetic ring 11 and the armature 2 are connected to the motor 4 through a mounting bolt 13. The mounting bolt 13 is parallel to the axial direction of the output shaft of the motor 4. A sleeve 131 is coaxially sleeved on the mounting bolt 13. One end of the sleeve 131 abuts against the end wall of the magnetic ring 11, and the other end abuts against the end wall of the motor 4. The armature 2 is sleeved on the outer periphery of the sleeve 131. When the coil 12 is energized, the armature 2 moves along the length direction of the sleeve 131 toward the side close to the coil 12. In order to increase the electromagnetic force on the armature 2, two coils 12 are provided, and are located at both ends of the magnetic ring 11.

[0043] Reference Figure 3 and Figure 4 In this embodiment, the brake disc 55 includes a first braking portion 51 and a second braking portion 52, the first braking portion 51 and the second braking portion 52 are coaxially fixedly connected, the outer diameter of the first braking portion 51 is larger than the outer diameter of the second braking portion 52, the first braking portion 51 is located on the side of the second braking portion 52 away from the fixing ring 3, the first braking portion 51 is located between the armature 2 and the end face of the motor 4, the second braking portion 52 is located between the end face of the motor 4 and the fixing ring 3, a first sliding gap 521 is provided between the second braking portion 52 and the fixing ring 3, and a second sliding gap 511 is provided between the first braking portion 51 and the armature 2. When the second braking portion 52 slides along the circumferential direction of the output shaft of the motor 4 toward the side close to the fixing ring 3, the first braking portion 51 is driven to slide synchronously to reduce the width of the second sliding gap 511, and further space is provided between the first braking portion 51 and the motor 4, thereby reducing the friction between the first braking portion 51 and the motor 4.

[0044] Reference Figure 4 In order to drive the first braking part 51 and the second braking part 52 to slide along the axial direction of the output shaft of the motor 4, the new power-off disc brake with a disc-off mechanism also includes a plurality of connecting components 6, which are spaced apart along the circumference of the fixing ring 3. The connecting component 6 includes a fixing bolt 61, a first locking nut 62 and an elastic member 63. The fixing bolt 61 is arranged parallel to the axial direction of the shaft of the motor 4. The fixing ring 3 is provided with a first through hole 31 along the axial direction of the shaft of the motor 4. One end of the fixing bolt 61 passes through the first through hole 31 and is threadedly connected with the second braking part 52. The fixing bolt 61 slides in the first through hole 31 along the axial direction of the shaft of the motor 4. The first locking nut 62 is located in the fixing ring 3 and the second braking portion 52, the first locking nut 62 is threadedly connected to the fixing bolt 61, one end of the first locking nut 62 abuts against the second braking portion 52, the elastic member 63 is parallel to the axial direction of the output shaft of the motor 4, the elastic member 63 is sleeved on the outer periphery of the fixing bolt 61, and the elastic member 63 is located on the side of the fixing ring 3 away from the second braking portion 52, one end of the elastic member 63 abuts against one end surface of the fixing ring 3, and the other end abuts against the bolt head end wall of the fixing bolt 61. In this embodiment, the elastic member 63 is a compression spring, and the elastic member 63 has a force to drive the first braking portion 51 and the second braking portion 52 to move toward the side close to the fixing ring 3 under a recoverable deformation.

[0045] Reference Figure 3 and Figure 4When the coil 12 is energized, the armature 2 moves toward the side close to the coil 12 under the action of the electromagnetic force. When the coil 12 is de-energized, the armature 2 moves toward the side close to the first brake portion 51, thereby further contacting the first brake portion 51 and pressing the first brake portion 51 toward the end face of the motor 4. At this time, one end of the first brake portion 51 contacts the armature 2, and the other end contacts the end face of the motor 4 to generate friction, thereby stopping the rotation of the motor 4. Since the fixing bolt 61 is fixedly connected to the second brake portion 52, the first brake portion 51 and the second brake portion 52 will drive the fixing bolt 61 to move toward the side away from the fixing ring 3. There is a gap between the first locking nut 62 and the fixing ring 3, and the elastic member 63 is in a compressed state. When the coil 12 is energized, The armature 2 is attracted by the coil 12 again and moves toward the side close to the coil 12. At this time, the first brake part 51 loses the force applied by the armature 2, and the output shaft of the motor 4 resumes rotation. However, at this time, when the power-off disc brake is placed vertically, since the first brake part 51 and the second brake part 52 have their own weight, one end of the first brake part 51 may still be in contact with the end face of the motor 4, further causing friction between the first brake part 51 and the end face of the motor 4, thereby causing wear on the first brake part 51. Since the elastic member 63 needs to change from a compressed state to a normal state, the second brake part 52 and the first brake part 51 will move toward the side close to the fixing ring 3. Therefore, one end of the first brake part 51 is separated from the end face of the motor 4, so that the motor 4 can resume rotation.

[0046] Reference Figure 3 In order to further increase the friction force between the brake and the end surface of the motor 4, friction parts 512 are fixedly connected on both sides of the first braking part 51, one friction part 512 is in contact with the armature 2, and the other friction part 512 is in contact with the end surface of the motor 4. For the convenience of description, the friction part 512 in contact with the end surface of the motor 4 is named the first friction plate 5121, and the friction part 512 in contact with the armature 2 is named the second friction plate 5122.

[0047] Reference Figure 3 and Figure 5, while the first friction plate 5121 is separated from the end face of the motor 4, in order to reduce the friction between the second friction plate 5122 and the armature 2 so as to make the second friction plate 5122 thinner, the new type of power-off disc brake with a disc-off mechanism also includes a limit assembly 7, and a plurality of limit assemblies 7 are arranged at intervals along the circumference of the fixing ring 3. In order to ensure the limiting effect, in this embodiment, three limit assemblies 7 are arranged, and the limit assembly 7 includes a positioning bolt 71 and a second locking nut 72. The fixing ring 3 is penetrated and opened with a second through hole 32 along the axial direction of the shaft of the motor 4. One end of the positioning bolt 71 passes through the second through hole 32 and abuts against the end wall of the second braking portion 52. The second locking nut 72 is threadedly connected to the positioning bolt 71, and the second locking nut 72 is located on the side of the fixing ring 3 away from the second braking portion 52, that is, one end of the positioning bolt 71 after passing through the second through hole 32 is located in the first sliding gap 521, and one end of the second locking nut 72 is tightly abutted against the end wall of the fixing ring 3;

[0048] Reference Figure 3 and Figure 5 When the coil 12 is powered off, the armature 2 is attracted, and the first brake part 51 loses the force applied by the armature 2. Under the action of the elastic member 63, the first brake part 51 and the second brake part 52 move toward the side close to the fixing ring 3. At this time, since one end wall of the second brake part 52 abuts against the end of the positioning bolt 71, the second brake part 52 is further blocked from continuing to move. At this time, there is a first limiting gap 5123 between the first friction plate 5121 and the end face of the motor 4, and there is a second limiting gap 5124 between the second friction plate 5122 and the armature 2. In an ideal state, the second locking screw 71 can be loosened to prevent the second brake part 52 from moving. The nut 72 moves the positioning bolt 71 in the second through hole 32 along the axial direction of the output shaft of the motor 4, and measures the height of the movement of the positioning bolt 71 with a feeler gauge. When the measurement is a certain value, the width of the first limit gap 5123 is the same as the width of the second limit gap 5124, so that the positioning bolt 71 can adjust the distance between the first friction plate 5121 and the end face of the motor 4, and the distance between the second friction plate 5122 and the armature 2, respectively, thereby reducing the friction between the first friction plate 5121 and the end face of the motor 4, while reducing the friction between the second friction plate 5122 and the armature 2.

[0049] The embodiment of the present application is a novel power-off disc brake with a disc release mechanism. The implementation principle is as follows: when the coil 12 is powered off, the armature 2 moves toward the first brake part 51, thereby applying force to the first brake part 51, and the first brake part 51 further moves toward the side close to the end face of the motor 4, and the first friction plate 5121 is pressed against the end face of the motor 4 and generates friction, so that the motor 4 stops rotating; loosen the second locking nut 72, adjust the distance between the end of the positioning bolt 71 and the second brake part 52, and when the coil 12 is powered on, the armature 2 is attracted, and the first brake part 51 is 1 loses the force exerted by the armature 2, and under the action of the elastic member 63, the first braking portion 51 and the second braking portion 52 move toward the side close to the fixing ring 3, and the end wall of the second braking portion 52 abuts against the end of the positioning bolt 71, so that the positioning bolt 71 blocks the second braking portion 52 from continuing to move, so that a first limiting gap 5123 is generated between the first friction plate 5121 and the end surface of the motor 4, and a second limiting gap 5124 is generated between the second friction plate 5122 and the armature 2, thereby preventing the first friction plate 5121 and the second friction plate 5122 from being worn and thinned.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A new type of power-off disc brake with a disc release mechanism, characterized in that: It comprises a magnetic attraction component (1), a fixing ring (3), an armature (2), a motor (4) and a brake disc (5); The magnetic attraction component (1) is sleeved on the output shaft of the motor (4), and the magnetic attraction component (1) is connected to the motor (4), and there is an installation gap (14) between the magnetic attraction component (1) and the output shaft of the motor (4); The armature (2) is mounted on one side of the magnetic attraction component (1); when the magnetic attraction component (1) is powered on, the armature (2) moves toward a side close to the magnetic attraction component (1); when the magnetic attraction component (1) is powered off, the armature (2) moves toward a side away from the magnetic attraction component (1); The fixing ring (3) is located in the installation gap (14), and the fixing ring (3) coaxial sleeve (131) is connected to the output shaft of the motor (4), the brake disc (5) coaxial sleeve (131) is arranged on the output shaft of the motor (4), the brake disc (5) is located between the armature (2) and the end face of the motor (4), the fixing ring (3) is located on the side of the brake disc (5) away from the motor (4), the brake disc (5) is slidably connected to the fixing ring (3) along the axial direction of the output shaft of the motor (4), a first sliding gap (521) is provided between the brake disc (5) and the fixing ring (3), and when the magnetic attraction component (1) is energized, the brake disc (5) slides toward the side away from the motor (4).

2. A novel power-off disc brake with a disc release mechanism according to claim 1, characterized in that: The magnetic attraction component (1) comprises a magnetic ring (11) and a coil (12); the magnetic ring (11) and a coaxial sleeve (131) are arranged on the output shaft of the motor (4); and the coil (12) is mounted on the magnetic ring (11).

3. A novel power-off disc brake with a disc release mechanism according to claim 2, characterized in that: The magnetic ring (11) and the armature (2) are connected to the motor (4) via mounting bolts (13); the armature (2) is sleeved on the mounting bolts (13); when the coil (12) is energized, the armature (2) moves toward a side close to the coil (12); when the coil (12) is de-energized, the armature (2) moves toward a side away from the coil (12).

4. A novel power-off disc brake with a disc release mechanism according to claim 2, characterized in that: The brake disc (5) comprises a first braking part (51) and a second braking part (52), the first braking part (51) and the second braking part (52) being coaxially fixedly connected, the outer diameter of the first braking part (51) being larger than the outer diameter of the second braking part (52), the first braking part (51) being located on a side of the second braking part (52) away from the fixing ring (3), the first braking part (51) being located between the armature (2) and the end face of the motor (4), the second braking part (52) being located between the end face of the motor (4) and the fixing ring (3), a first sliding gap (521) being provided between the second braking part (52) and the fixing ring (3), and a second sliding gap (511) being provided between the first braking part (51) and the armature (2).

5. A novel power-off disc brake with a disc release mechanism according to claim 4, characterized in that: It also includes a connecting assembly (6) for driving the brake disc (5) to slide along the axial direction of the output shaft of the motor (4), wherein the connecting assembly (6) includes a fixing bolt (61) and a first locking nut (62); The fixing ring (3) is provided with a first through hole (31) along the axial direction of the output shaft of the motor (4); the fixing bolt (61) is parallel to the axial direction of the output shaft of the motor (4); one end of the fixing bolt (61) passes through the first through hole (31) and is threadedly connected to the second braking portion (52); the fixing bolt (61) slides in the first through hole (31) along the axial direction of the output shaft of the motor (4); The first locking nut (62) is threadedly connected to the fixing bolt (61), and the first locking nut (62) is located in the first sliding gap (521), and one end of the first locking nut (62) abuts against the end wall of the brake disc (5).

6. A novel power-off disc brake with a disc release mechanism according to claim 5, characterized in that: The connecting assembly (6) further comprises an elastic member (63), wherein the elastic member (63) is sleeved on the fixing bolt (61), wherein one end of the elastic member (63) is pressed against an end wall of the fixing ring (3) away from the second braking portion (52), and the other end is pressed against a bolt head of the fixing bolt (61), and the elastic member (63) has a force to drive the first braking portion (51) and the second braking portion (52) to move toward a side close to the fixing ring (3) under a recoverable deformation.

7. A novel power-off disc brake with a disc release mechanism according to claim 4, characterized in that: Friction pieces (512) are fixedly connected to both sides of the first braking portion (51); when the coil (12) is powered off, one of the friction pieces (512) is pressed against an end surface of the motor (4), and the other friction piece (512) is pressed against the armature (2).

8. The novel power-off disc brake with a disc release mechanism according to claim 4 is characterized in that: It also includes a limiting assembly (7), the limiting assembly (7) including a positioning bolt (71) and a second locking nut (72), the fixing ring (3) is provided with a second through hole (32) along the axial direction of the output shaft of the motor (4), one end of the positioning bolt (71) passes through the second through hole (32) and then abuts against the end wall of the second braking portion (52); The second locking nut (72) is threadedly connected to the positioning bolt (71).

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