Motor brake, motor and automatic guided vehicle

Abstract

The utility model relates to the technical field of motors, and discloses a motor brake, a motor and an automatic guide vehicle, the motor brake comprises a base, a mounting plate, a connecting piece, a friction plate, an armature plate, an elastic piece and a coil, the base is provided with a through hole, the mounting plate is fixedly connected with the base, and the connecting piece is fixedly connected with the mounting plate and the base; the base is provided with an axial limiting space, the friction plate is movably arranged in the axial limiting space, the armature plate is movably installed on the connecting piece and located in the axial limiting space, the elastic piece is arranged between the armature plate and the base, and the coil is arranged on the base. And when the elastic piece is compressed away from the friction plate, the friction plate can freely rotate along with the main shaft. When braking or accidental power failure is needed, the coil of the motor brake loses power, the magnetic field disappears, the elastic piece pushes the armature plate out, the armature plate and the mounting plate clamp the friction plate, the friction plate cannot rotate, the spindle cannot rotate, and motor braking is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly to a motor brake, a motor and an automated guided vehicle. Background Art

[0002] An automated guided vehicle (AGV) is an industrial vehicle that automatically travels along a set route with loaded goods or tow a loaded trolley to a designated location.

[0003] In the prior art, the drive of an automated guided vehicle usually transmits power to the wheels through a transmission system after the motor. The movement and braking of the automated guided vehicle both rely on the motor itself. In case of a failure, such as a sudden power outage, which causes the motor to fail, the vehicle cannot brake, posing a safety hazard. Summary of the Utility Model

[0004] In view of this, the utility model provides a motor brake, a motor and an automated guided vehicle to solve the problem that in the prior art, when there is a sudden power outage, the motor fails and the vehicle cannot brake.

[0005] In a first aspect, the utility model provides a motor brake, which includes a base, a mounting plate, a connecting member, a friction plate, an armature plate, an elastic member and a coil. The base is adapted to be fixedly connected to the motor housing. A through hole is provided on the base, and the through hole is adapted to pass through the main shaft of the motor. The mounting plate is fixedly connected to the base. The connecting member fixedly connects the mounting plate and the base and forms an axial limiting space between the mounting plate and the base. The friction plate is movably arranged in the axial limiting space. A limiting portion is provided on the friction plate, and the limiting portion is adapted to be in limiting connection with the main shaft. The armature plate is movably mounted on the connecting member and is located in the axial limiting space. The elastic member is arranged between the armature plate and the base, and the elastic member has an elastic force that drives the armature plate to abut against the friction plate. The coil is arranged on the base, and the coil is adapted to be electrically connected to the motor. The coil has a magnetic force that drives the armature plate to separate from the friction plate.

[0006] Beneficial Effects: When the motor in the utility model works, after the motor brake is powered on, the coil current generates a magnetic field, attracting the armature plate, compressing the elastic member and moving away from the friction plate. At this time, the friction plate can rotate freely with the main shaft. When braking is required or there is an accidental power outage, the coil of the motor brake loses power, the magnetic field disappears, and the elastic member pushes the armature plate out, causing the armature plate to clamp the friction plate with the mounting plate, and the friction plate cannot rotate, thus the main shaft cannot rotate, completing the motor brake.

[0007] In an optional embodiment, the connecting member includes a fastening member and a limiting member. The fastening member fixedly connects the mounting plate and the base, the limiting member is sleeved on the fastening member, and both ends of the limiting member abut against the mounting plate and the base respectively.

[0008] Beneficial effects: The utility model ensures an axial limiting space between the mounting plate and the base through the limiting member, so that the armature plate can move within the axial direction.

[0009] In an alternative embodiment, a mounting groove is provided on the end face of the base, and the mounting grooves and the connecting members are distributed at intervals on the circumference of the base, and one end of the elastic member is mounted in the mounting groove.

[0010] Beneficial effects: In the utility model, when the elastic member is compressed, the mounting groove can play a limiting role, which can ensure the firm installation of the elastic member.

[0011] In an alternative embodiment, a mounting portion is provided on the base, and the coil is fixed on the mounting portion.

[0012] Beneficial effects: In the utility model, the annular mounting portion can ensure that the coil is evenly arranged on the mounting portion, so that a uniform magnetic field can be generated, ensuring a uniform magnetic attraction force of the coil on the armature plate, and the armature plate can be firmly adsorbed during the operation of the motor.

[0013] In a second aspect, the utility model also provides a motor, which includes a motor housing, a main shaft, a stator, a rotor and the above-mentioned motor brake. The interior of the motor housing is a cavity, the main shaft penetrates through the motor housing, the stator is fixedly installed in the motor housing, the rotor is fixedly installed on the main shaft, and the main shaft is limitedly connected with the friction plate.

[0014] Since the motor of the utility model adopts the motor brake in the utility model, it has the same beneficial effects as the motor brake.

[0015] In an alternative embodiment, the motor further includes a controller, and the controller is electrically connected to the stator and the coil.

[0016] Beneficial effects: In the utility model, by setting the controller, the rotor and the friction plate can be controlled to rotate synchronously, ensuring the synchronism of the operation of the motor and the motor brake.

[0017] In an alternative embodiment, the motor further includes an end cover, the end cover is fixedly connected to the motor housing, and the controller is installed in the end cover.

[0018] In an alternative embodiment, the motor further includes a speed reducer, and the main shaft is connected to the speed reducer.

[0019] Beneficial effects: In the utility model, since the external torque is transmitted from the output member of the speed reducer to the main shaft as a process of increasing speed and reducing torque, the torque required for braking from the main shaft end is smaller than that for braking from the output member of the speed reducer. Therefore, the motor brake can be set to a smaller size, reducing the space occupation.

[0020] In an alternative embodiment, the speed reducer includes a housing, a transmission assembly, and an output member. The housing is fixedly connected to the machine housing. The transmission assembly is installed inside the housing. The main shaft is connected to the transmission assembly. The output member is arranged inside the housing and is connected to the transmission assembly.

[0021] In a third aspect, the present utility model further provides an automatic guided vehicle, which includes a vehicle body, wheels, and the above-mentioned motor. The motor is installed on the vehicle body and is connected to the wheels.

[0022] Beneficial effects: The present utility model arranges the motor with an electric motor brake on the vehicle body. When a fault occurs, such as a sudden power failure, the motor will not fail and can complete braking under the action of the electric motor brake, having good safety. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of an electric motor brake according to an embodiment of the present utility model;

[0025] Figure 2 It is a cross-sectional view of an electric motor brake according to an embodiment of the present utility model;

[0026] Figure 3 It is an exploded view of a motor according to an embodiment of the present utility model;

[0027] Figure 4 It is a cross-sectional view of a motor according to an embodiment of the present utility model;

[0028] Figure 5 It is a cross-sectional view of a speed reducer in a motor according to an embodiment of the present utility model.

[0029] Description of the Reference Numerals in the Drawings:

[0030] 1. Base; 101. Through hole; 102. Installation groove; 103. Installation part;

[0031] 2. Mounting plate;

[0032] 3. Connecting piece; 301. Fastening piece; 302. Limiting piece;

[0033] 4. Friction plate; 401. Limiting part;

[0034] 5. Armature plate;

[0035] 6. Elastic member;

[0036] 7. Coil;

[0037] 8. Motor housing;

[0038] 9. Main shaft; 901. Second limiting portion;

[0039] 10. Stator;

[0040] 11. Rotor;

[0041] 12. Controller;

[0042] 13. End cover;

[0043] 14. Reducer; 141. Housing; 142. Transmission assembly; 143. Output member;

[0044] 100. Motor brake. Detailed implementation manners

[0045] For the purpose, technical solutions and advantages of the embodiments of the present utility model to be more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present utility model.

[0046] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 5 , to describe the embodiments of the present utility model.

[0047] According to an embodiment of the present utility model, on the one hand, as shown in Figure 1 and Figure 2 , a motor brake 100 is provided, which includes a base 1, a mounting plate 2, a connecting member 3, a friction plate 4, an armature plate 5, an elastic member 6 and a coil 7. The base 1 is adapted to be fixedly connected to the motor housing 8. A through hole 101 is provided on the base 1, and the through hole 101 is adapted to pass through the main shaft 9 of the motor. The mounting plate 2 is fixedly connected to the base 1. The connecting member 3 fixedly connects the mounting plate 2 and the base 1 and forms an axial limiting space between the mounting plate 2 and the base 1. The friction plate 4 is movably arranged in the axial limiting space. A limiting portion 401 is provided on the friction plate 4, and the limiting portion 401 is adapted to be in limiting connection with the main shaft 9. The armature plate 5 is movably mounted on the connecting member 3 and is located in the axial limiting space. The elastic member 6 is arranged between the armature plate 5 and the base 1, and the elastic member 6 has an elastic force for driving the armature plate 5 to abut against the friction plate 4. The coil 7 is arranged on the base 1, and the coil 7 is adapted to be electrically connected to the motor. The coil 7 has a magnetic force for driving the armature plate 5 to separate from the friction plate 4.

[0048] Specifically, in this embodiment, the base 1 has a cylindrical structure. A through hole 101 for passing through the main shaft 9 is provided in the middle of the base 1 along the axial direction. The coil 7 is fixedly arranged in the base 1 and is connected to the motor for being energized synchronously with the motor. The mounting plate 2 is fixedly connected to the base 1, and an axial limiting space is formed between the mounting plate 2 and the base 1.

[0049] In this embodiment, the friction plate 4 is in the shape of a circular plate. The radial dimension of the friction plate 4 is smaller than the radial dimensions of the mounting plate 2 and the base 1. The friction plate 4 is movably arranged in the axial limiting space. A limiting portion 401 is provided in the middle of the friction plate 4. In this embodiment, the limiting portion 401 is a keyway. The main shaft 9 is installed in the keyway by a key, and the main shaft 9 can rotate synchronously with the friction plate 4.

[0050] In this embodiment, the armature plate 5 has a circular plate structure, and its radial dimension is not larger than the radial dimension of the base 1. The armature plate 5 is axially movably arranged in the axial limiting space at a position between the friction plate 4 and the base 1. The armature plate 5 can only move closer to or away from the friction plate 4 in the axial direction. The armature plate 5 is made of a ferromagnetic metal material. When the armature plate 5 contacts the friction plate 4, the frictional force between the armature plate 5 and the friction plate 4 can stop the friction plate 4 from rotating, thereby driving the main shaft 9 to stop rotating.

[0051] In this embodiment, openings are provided at positions on the armature plate 5 close to the edge. The connecting member 3 passes through the armature plate 5 and is connected to positions on the end faces of the base 1 and the mounting plate 2 close to the edge. The connecting member 3 limits the end faces of the base 1 and the mounting plate 2 to form an axial limiting space.

[0052] In this embodiment, no specific limitation is made on the elastic member 6. To conform to the actual situation, in this embodiment, the elastic member 6 is a spring. The elastic member 6 is arranged on the end face between the armature plate 5 and the base 1, and the elastic member 6 and the connecting member 3 are arranged on both sides of the main shaft 9.

[0053] When the motor in this utility model works, after the motor brake 100 is energized, the current in the coil 7 generates a magnetic field, attracting the armature plate 5, compressing the elastic member 6 and moving away from the friction plate 4. At this time, the friction plate 4 can rotate freely with the main shaft 9. When braking is required or there is an accidental power failure, the coil 7 of the motor brake 100 loses power, the magnetic field disappears, the elastic member 6 pushes the armature plate 5 out, causing the armature plate 5 to clamp the friction plate 4 with the mounting plate 2, and the friction plate 4 cannot rotate, thereby realizing that the main shaft 9 cannot rotate and completing the motor brake.

[0054] In one embodiment, as Figure 2 shown, the connecting member 3 includes a fastening member 301 and a limiting member 302. The fastening member 301 fixedly connects the mounting plate 2 and the base 1. The limiting member 302 is sleeved on the fastening member 301, and both ends of the limiting member 302 are abutted against the mounting plate 2 and the base 1 respectively.

[0055] Specifically, in this embodiment, the fastener 301 is a bolt, and the limiting member 302 is a clearance column. The clearance column has a columnar structure with a cavity inside. The two ends of the clearance column respectively abut against the end faces of the mounting plate 2 and the base 1. The bolt passes through the mounting plate 2 and is sleeved inside the clearance column, and the end of the bolt is connected to the base 1. The length of the clearance column is the size of the axial limiting space. In this embodiment, the length of the clearance column is greater than the sum of the thicknesses of the friction plate 4 and the armature plate 5 to ensure that the armature plate 5 has sufficient axial movement space within the axial limiting space.

[0056] The utility model ensures an axial limiting space between the mounting plate 2 and the base 1 through the limiting member 302, so that the armature plate 5 can move in the axial direction.

[0057] In one embodiment, as Figure 2 shown, the end face of the base 1 is provided with a mounting groove 102. The mounting grooves 102 and the connecting member 3 are spaced apart on the circumference of the base 1. One end of the elastic member 6 is installed in the mounting groove 102.

[0058] Specifically, in this embodiment, the end face of the base 1 is provided with an inwardly concave mounting groove 102. When the elastic member 6 is compressed, it can be received into the mounting groove 102.

[0059] In the utility model, when the elastic member 6 is compressed, the mounting groove 102 can play a limiting role to ensure the firm installation of the elastic member 6.

[0060] In one embodiment, as Figure 2 shown, the base 1 is provided with a mounting portion 103, and the coil 7 is fixed on the mounting portion 103.

[0061] Specifically, in this embodiment, a ring-shaped mounting portion 103 is provided at the middle position of the base 1. The coil 7 is wound around the mounting portion 103. The wiring terminals of the coil 7 extend outward from the side of the base 1 and are electrically connected to the motor. When the motor is powered on and operates, the coil 7 is simultaneously powered on to generate a magnetic field to attract the armature plate 5.

[0062] In the utility model, the ring-shaped mounting portion 103 can ensure that the coil 7 is evenly arranged on the mounting portion 103, so as to generate a uniform magnetic field, ensure that the coil 7 has a uniform magnetic attraction force on the armature plate 5, and the armature plate 5 can be firmly adsorbed during the operation of the motor.

[0063] According to an embodiment of the present invention, on the other hand, as Figures 3 to 5 shown, a motor is further provided, including a motor housing 8, a main shaft 9, a stator 10, a rotor 11, and the above-mentioned motor brake 100. The inside of the motor housing 8 is a cavity. The main shaft 9 is arranged inside the motor housing 8. The stator 10 is fixedly installed inside the motor housing 8. The rotor 11 is fixedly installed on the main shaft 9. The main shaft 9 is limitedly connected to the friction plate 4.

[0064] Specifically, in this embodiment, the casing 8 is a cylindrical shell with a cavity inside. The stator 10 is installed inside the casing 8, and an armature winding is installed on the stator 10. The rotor 11 is connected to the main shaft 9, and paired main magnetic poles are installed on the rotor 11. The stator 10 is electrically connected to the coil 7. When the stator 10 is energized, a rotating magnetic field is generated and acts on the rotor 11 to form a magneto-electric force rotating torque, driving the rotor 11 to drive the main shaft 9 to rotate inside the stator 10. After the coil 7 is energized, a magnetic field is generated to attract the armature plate 5, causing the friction plate 4 to rotate synchronously with the main shaft 9. When the motor needs to brake or power off accidentally, the coil 7 of the motor brake 100 loses power, the magnetic field disappears, and the elastic member 6 pushes out the armature plate 5, clamping the friction plate 4 between the armature plate 5 and the mounting plate 2. The friction plate 4 cannot rotate, thus preventing the main shaft 9 from rotating and completing the motor braking.

[0065] In this embodiment, a second limiting portion 901 matching the limiting portion 401 is provided at one end of the main shaft 9 connected to the friction plate 4. The limiting portion 401 and the second limiting portion 901 are firmly connected to the friction plate 4 through a key.

[0066] In one embodiment, as Figure 3 and Figure 4 shown, the motor further includes a controller 12, and the controller 12 is electrically connected to the stator 10 and the coil 7.

[0067] Specifically, in this embodiment, the controller 12 is used to energize the motor brake 100 and control the rotation of the rotor 11.

[0068] In the present utility model, by setting the controller 12, the synchronous rotation of the rotor 11 and the friction plate 4 can be controlled, ensuring the synchronism of the operation of the motor and the motor brake 100.

[0069] In one embodiment, as Figure 3 and Figure 4 shown, the motor further includes an end cover 13, and the end cover 13 is fixedly connected to the casing 8, and the controller 12 is installed inside the end cover 13.

[0070] Specifically, in this embodiment, the end cover 13 is connected to one end of the casing 8 where the motor brake 100 is provided, and the controller 12 is installed inside the end cover 13.

[0071] In one embodiment, as Figure 3 and Figure 4 shown, the motor further includes a reducer 14, and the main shaft 9 is connected to the reducer 14.

[0072] Specifically, in this embodiment, the speed reducer 14 is disposed at one end of the housing away from the motor brake 100. The main shaft 9 is connected to the speed reducer 14, and the main shaft 9 inputs power into the speed reducer 14. The speed reducer 14 outputs the power after reducing the speed and increasing the torque. The transfer of power from the main shaft 9 to the speed reducer 14 is a process of reducing speed and increasing torque, and the transfer of external torque from the speed reducer 14 to the main shaft 9 is a process of increasing speed and reducing torque.

[0073] In the present utility model, since the transfer of external torque from the output member 143 of the speed reducer 14 to the main shaft 9 is a process of increasing speed and reducing torque, the torque required for braking from the main shaft 9 end is smaller than that for braking from the output member 143 of the speed reducer 14. Therefore, the motor brake 100 can be set to a smaller size, reducing the space occupancy.

[0074] In one embodiment, as Figure 5 shown, the speed reducer 14 includes a housing 141, a transmission assembly 142, and an output member 143. The housing 141 is fixedly connected to the machine housing 8. The transmission assembly 142 is installed in the housing 141. The main shaft 9 is connected to the transmission assembly 142. The output member 143 is disposed in the housing 141 and is connected to the transmission assembly 142.

[0075] Specifically, in this embodiment, the housing 141 is connected to one end of the housing away from the motor brake 100. One end of the main shaft 9 away from the motor brake 100 is connected to the transmission assembly 142. In this embodiment, the transmission assembly 142 is a set of meshing gears. One end of the output member 143 is meshed with the transmission assembly 142, and the other end is used for outputting power.

[0076] According to an embodiment of the present utility model, on the other hand, an automatic guided vehicle is further provided, including a vehicle body, wheels, and the above-mentioned motor. The motor is installed on the vehicle body and is connected to the wheels.

[0077] Specifically, in this embodiment, the motor is installed on the vehicle body. The output member 143 of the speed reducer 14 is connected to the wheels. The power supply in the vehicle body supplies power to the rotor 11 and the coil 7 simultaneously through the controller 12.

[0078] The present utility model installs the motor with the motor brake 100 on the vehicle body. When a fault such as a sudden power failure occurs, the motor will not fail and can complete braking under the action of the motor brake 100, having good safety.

[0079] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electric motor brake, characterized in that, Comprising: A base (1), the base (1) being adapted to be fixedly connected to the housing (8) of the motor, the base (1) being provided with a through hole (101), and the through hole (101) being adapted to pass through the main shaft (9) of the motor; A mounting plate (2), the mounting plate (2) being fixedly connected to the base (1); A connecting member (3), the connecting member (3) fixedly connecting the mounting plate (2) and the base (1), and forming an axial limiting space between the mounting plate (2) and the base (1); A friction plate (4), the friction plate (4) being movably arranged in the axial limiting space, the friction plate (4) being provided with a limiting portion (401), and the limiting portion (401) being adapted to be in limiting connection with the main shaft (9); An armature plate (5), the armature plate (5) being movably mounted on the connecting member (3) and located in the axial limiting space; An elastic member (6), the elastic member (6) being arranged between the armature plate (5) and the base (1), and the elastic member (6) having an elastic force for driving the armature plate (5) to abut against the friction plate (4); A coil (7), the coil (7) being arranged on the base (1), the coil (7) being adapted to be electrically connected to the motor, and the coil (7) having a magnetic force for driving the armature plate (5) to separate from the friction plate (4).

2. The electric motor brake according to claim 1, wherein The connecting member (3) comprises: A fastener (301), the fastener (301) fixedly connecting the mounting plate (2) and the base (1); A limiting member (302), the limiting member (302) being sleeved on the fastener (301), and both ends of the limiting member (302) abutting against the mounting plate (2) and the base (1) respectively.

3. The electric motor brake according to claim 1 or 2, characterized in that, An installation groove (102) is provided on the end face of the base (1), and the installation groove (102) and the connecting member (3) are distributed at intervals on the circumference of the base (1), and one end of the elastic member (6) is installed in the installation groove (102).

4. The electric motor brake according to claim 1, characterized in that, An installation portion (103) is provided on the base (1), and the coil (7) is fixed on the installation portion (103).

5. A motor, characterized in that, Comprising: A housing (8), the interior of the housing (8) being a cavity; A main shaft (9), the main shaft (9) passing through the housing (8); A stator (10), the stator (10) being fixedly installed in the housing (8); A rotor (11), the rotor (11) being fixedly installed on the main shaft (9); The electric motor brake (100) according to any one of claims 1 to 4, the main shaft (9) being in limiting connection with the friction plate (4).

6. The motor according to claim 5, characterized in that, Further comprising: A controller (12), the controller (12) being electrically connected to the stator (10) and the coil (7).

7. The motor according to claim 6, characterized in that, Further comprising: An end cover (13), the end cover (13) being fixedly connected to the housing (8), and the controller (12) being installed in the end cover (13).

8. The electric machine according to any one of claims 5 to 7, characterized in that, Further comprising: A speed reducer (14), the main shaft (9) being connected to the speed reducer (14).

9. The motor according to claim 8, wherein, The speed reducer (14) comprises: A housing (141), the housing (141) being fixedly connected to the housing (8); A transmission assembly (142), the transmission assembly (142) is installed within the housing (141), and the main shaft (9) is connected to the transmission assembly (142); An output member (143), the output member (143) is disposed within the housing (141), and the output member (143) is connected to the transmission assembly (142).

10. An automatic guided vehicle, characterized in that, Comprising: A vehicle body; Wheels; The motor according to any one of claims 5 to 9, the motor is installed on the vehicle body, and the motor is connected to the wheels.

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