Energy-saving electromagnetic braking type motor

Abstract

The right side surface of a right end cover of the energy-saving electromagnetic braking type motor extends rightwards to form a cylinder body (9), the right end of the cylinder body is provided with a flange (10), an annular magnet yoke (7) is arranged in the cylinder body, the outer circle of the magnet yoke is matched with the inner circle of the cylinder body, the annular surface of the magnet yoke is provided with a concave part, a coil (11) is arranged in the concave part, a main shaft (1) penetrates through the magnet yoke, and the main shaft is sleeved with a disc-shaped armature (13). The armature is provided with an inner spline, the contact portion of the main shaft and the armature is provided with an outer spline (15), and the armature is located on the right side of a flange (10) and can be attached to the flange. The beneficial effects are that: 1, during the operation of the motor, the coil does not consume electric energy; in the braking period, the coil consumes electric energy, but the braking process does not exceed 1 second, and compared with the prior art, the coil consumes little power; the armature is in spline fit with the main shaft, the main shaft does not bear axial force in the braking process, and axial displacement of the main shaft is avoided;

Description

Technical Field

[0001] The utility model relates to an electromagnetic braking motor. Background Art

[0002] The electromagnetic brake motor includes a motor and an electromagnetic brake. The electromagnetic brake is composed of a coil, a yoke, a spring and a release. When the motor rotates, the coil is energized, the armature and the yoke are attracted to each other, and the brake is released. When the motor stops, the coil loses power, the yoke releases the armature, and the motor is braked under the action of the spring.

[0003] When the load of the motor is a gravity load, the above braking method must be used; however, when the load of the motor is a non-gravity load (that is, when the motor stops rotating, there is no external force that can make the motor rotate), this braking method will waste electric energy because the coil consumes electric energy all the time during the rotation of the motor. Utility Model Content

[0004] In view of the above problems, the present invention proposes an energy-saving electromagnetic brake motor, in which the brake coil does not consume electrical energy during the operation of the motor.

[0005] The technical solution of the present utility model is an energy-saving electromagnetic brake type motor, which includes a casing 4, a stator 5 fixed to the inner wall of the casing, a rotor 6 inserted in the stator, the two ends of the casing are respectively connected to the left end cover 2 and the right end cover 8, and the two ends of the main shaft 1 of the rotor are respectively connected to the end cover and the right end cover through bearings 2; it is characterized in that the right side of the right end cover is provided with a cylinder 9 extending to the right, the right end of the cylinder has a flange 10, an annular yoke 7 is placed in the cylinder, the outer circle of the yoke is matched with the inner circle of the cylinder, the annular surface of the yoke has a recess, a coil 11 is placed in the recess, the main shaft 1 passes through the yoke, and a disc-shaped armature 13 is sleeved on the main shaft, the armature has an internal spline, and the contact part between the main shaft and the armature has an external spline 15, the armature is located on the right side of the flange 10, and the armature can be attached to the flange.

[0006] The braking principle is that when the motor is running, the coil is de-energized, there is no magnetic flux in the yoke, and the armature is in a released state; when the motor stops running, the coil is energized, the yoke generates magnetic flux, the yoke attracts the armature, and the armature and flange are tightly attached. The friction between them causes the motor to stop rotating quickly. After the braking is completed, the coil is de-energized again.

[0007] The beneficial effects of the present invention are: 1. The coil does not consume electrical energy during the operation of the motor; during the braking period, the coil consumes electrical energy, but the braking process will not exceed 1 second. Compared with the existing technology, the coil consumes very little power; 2. The armature and the main shaft are splined, and during the braking process, the main shaft does not bear axial force, thereby avoiding axial displacement of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the present utility model.

[0009] Figure 2 for Figure 1 Magnified view of section C.

[0010] Figure symbols: 1-main shaft, 2-bearing, 3-left end cover, 4-housing, 5-stator, 6-rotor, 7-yoke, 8-right end cover, 9-cylinder, 10-flange, 11-coil, 12-spring, 13-armature, 14-limiting sleeve, 15-external spline, 16-screw, 17-step.

[0011] Figure 3 This is the controller circuit schematic. DETAILED DESCRIPTION

[0012] An energy-saving electromagnetic brake motor includes a casing 4, a stator 5 fixed to the inner wall of the casing, and a rotor 6 inserted in the stator. The two ends of the casing are respectively connected to a left end cover 2 and a right end cover 8, and the two ends of the rotor's main shaft 1 are supported in the end cover and the right end cover respectively through bearings 2; its characteristic is that a cylinder 9 extends to the right from the right side of the right end cover, the right end of the cylinder has a flange 10, an annular yoke 7 is placed in the cylinder, the outer circle of the yoke matches the inner circle of the cylinder, the yoke is fixed in the cylinder by screws 16, a recess is provided on the annular surface of the yoke, a coil 11 is placed in the recess, the main shaft 1 passes through the yoke, and a disc-shaped armature 13 is sleeved on the main shaft, the armature has an internal spline, and the contact between the main shaft and the armature has an external spline 15, the armature is located on the right side of the flange 10, and the armature can be attached to the flange.

[0013] The braking principle is that when the motor is running, the coil is de-energized, there is no magnetic flux in the yoke, and the armature is in a released state; when the motor stops running, the coil is energized, the yoke generates magnetic flux, the yoke attracts the armature, and the armature is tightly attached to the flange. The friction between them causes the motor to stop rotating quickly.

[0014] The armature and the spindle are splined together, and the armature can slide on the spindle. When the yoke attracts the armature, the magnetic force will not generate axial force on the spindle, thereby preventing axial displacement of the spindle.

[0015] When the yoke releases the armature, the armature may contact the flange, causing friction and noise. To prevent this, a step 17 is provided at the junction of the main shaft and the external spline 15. Specifically, the diameter of the external spline 15 is smaller than that of the main shaft. A spring 12 is mounted on the external spline, located between the step 17 and the armature. A stop sleeve 14 is provided on the right side of the armature and is fixed to the external spline with screws 16. This way, when the yoke releases the armature, the spring presses the armature against the stop sleeve 14, preventing it from contacting the flange.

[0016] The operation and braking of the motor are controlled by a controller such as Figure 3 As shown, the controller includes a power switch K, a start button QA, a stop button, an AC contactor, and a relay. The busbar M is connected to the A phase line through the power switch K.

[0017] One end of the coil CJ of the AC contactor is connected to the busbar through the start button QA, and one end of the coil CJ of the AC contactor is connected to the 0 line;

[0018] The normally open contact CJ1 of the AC contactor is connected in series with the normally closed contact TA1 of the stop button, and this series circuit is connected in parallel with the start button QA;

[0019] One end of the relay coil J is connected to the busbar M through the normally closed contact TA1 of the stop button, and the other end of the relay coil J is connected to the 0 line;

[0020] One end of the coil 11 is connected to the busbar M through the contact J1 of the relay, and the other end of the coil 11 is connected to the zero line.

[0021] The control principle is that when the start button is pressed, the coil CJ of the AC contactor is energized, the normally open contact CJ1 of the AC contactor is closed, and the main contact of the AC contactor ( Figure 3 (not shown) controls the rotation of the motor;

[0022] Press and hold the stop button, the coil CJ of the AC contactor loses power, the motor stops, the coil J of the relay is energized, the contact J1 of the relay closes, the coil 11 of the yoke is energized, the motor is braked, and when the braking ends, release the stop button.

[0023] To start the motor again, press the start button.

[0024] It should be noted that, since the motor braking process does not exceed 1 second, the pressing and holding of the stop button is also only about 1 second, which will not cause any inconvenience to the operation.

Claims

1. An energy-saving electromagnetic brake motor, comprising a housing (4), a stator (5) fixed to the inner wall of the housing, a rotor (6) inserted into the stator, the housing having two ends connected to a left end cover (3) and a right end cover (8), the main shaft (1) of the rotor having two ends supported in the left end cover and the right end cover via bearings (2); wherein: A cylinder (9) extends to the right from the right side of the right end cover, and the right end of the cylinder has a flange (10). An annular yoke (7) is placed in the cylinder, and the outer circle of the yoke matches the inner circle of the cylinder. The annular surface of the yoke has a recess, and a coil (11) is placed in the recess. The main shaft (1) passes through the yoke, and a disc-shaped armature (13) is sleeved on the main shaft. The armature has an internal spline, and the contact portion between the main shaft and the armature has an external spline (15). The armature is located on the right side of the flange (10), and the armature can be attached to the flange.

2. The energy-saving electromagnetic brake motor according to claim 1, characterized in that: A step (17) is provided at the joint of the main shaft and the external spline (15), a spring (12) is sleeved on the external spline, the spring (12) is located between the step (17) and the armature, and a limit sleeve (14) is provided on the right side of the armature.

3. The energy-saving electromagnetic brake motor according to claim 1, characterized in that: The operation and braking of the energy-saving electromagnetic brake motor are controlled by a controller, which includes a power switch K, a start button QA, a stop button, an AC contactor, and a relay; The busbar M is connected to the A phase line through the power switch K; One end of the coil CJ of the AC contactor is connected to the busbar M through the start button QA, and one end of the coil CJ of the AC contactor is connected to the 0 line; The normally open contact CJ1 of the AC contactor is connected in series with the normally closed contact TA1 of the stop button, and the series circuit is connected in parallel with the start button QA; One end of the relay coil J is connected to the bus M through the normally open contact TA2 of the stop button, and the other end of the relay coil J is connected to the 0 line; One end of the coil (11) is connected to the busbar M through the contact J1 of the relay, and the other end of the coil (11) is connected to the zero line.

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