Electromagnetic brake motor

Abstract

An electromagnetic brake motor comprises a main shaft, a machine base and a rear end cover, the right side face of the rear end cover extends rightwards to form a first barrel (10) and a second barrel (9), an annular magnet yoke (3) is installed on the inner wall of the first barrel, a brake spring is sleeved on the outer circle of the second barrel, a guide shaft (5) is installed on the rear end cover, the right end of the guide shaft is inserted in a suction cup (11), and the right end of the guide shaft is connected with a motor. A movable disc (12) is arranged on the right side of the suction cup and is in spline fit with the main shaft, a cover plate (13) is arranged on the right side of the brake disc, and the cover plate is connected with the first cylinder body. The beneficial effects are that the rear end cover extends to form the first cylinder and the second cylinder, the magnet yoke, the spring, the sucker and the movable disc are arranged in the cylinder, and the structure is compact; the magnet yoke, the spring, the sucker and the movable disc are convenient to mount without assembly accumulated errors; the sucker is not connected to the magnet yoke, but is connected to the rear end cover through the guide shaft, so that the magnet yoke is simple in structure and convenient to manufacture, and production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to an electromagnetic brake motor, which consists of a motor and an electromagnetic brake. Background Art

[0002] An electromagnetic brake motor generally consists of a motor and an electromagnetic brake. The electromagnetic brake comprises a magnetic yoke, suction cup, spring, moving disc, and cover plate. The yoke, suction cup, spring, and cover plate are mounted on the rear end cover of the motor. The moving disc is mounted on the motor's main shaft and can only move axially. The operating principle is that when the motor is powered off and stopped, the suction cup, under the force of the spring, presses against the moving disc, causing it to contact the cover plate. The friction between them quickly stops the motor. When the motor is powered on and running, the magnetic yoke engages the suction cup, separating the moving disc from the cover plate.

[0003] In order to improve the braking effect, when the suction cup presses the movable disc, the suction cup should not rotate with the movable disc. In this way, there is friction between the movable disc, the suction cup and the cover plate, which can improve the braking effect.

[0004] The installation structure of the suction cup in the prior art is relatively complicated. Electromagnetic brakes, motors and Mechanical equipment Patent, discloses a mounting structure for an armature (i.e., a suction cup); CN220544802U An electromagnetic brake motor , also disclosed an armature (i.e. suction cup) installation structure, the suction cups are all connected to the yoke, which requires drilling holes on the yoke, resulting in uneven distribution of magnetic flux density on the yoke and reduced utilization of the yoke material. Due to the high hardness of the yoke, drilling is difficult; in addition, the volume of the electromagnetic brake is also large, and it is necessary to make improvements. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an electromagnetic brake motor, which has reliable braking, a simple yoke structure of the electromagnetic brake, and is easy to manufacture and install, and a compact electromagnetic brake structure, which can reduce manufacturing costs.

[0006] The technical solution of the present utility model is an electromagnetic brake motor, which includes a main shaft 8, a machine base 1, and a rear end cover 2. The rear end cover is connected to the machine base, and is characterized in that the right side of the rear end cover is respectively extended to the right with a first cylinder 10 and a second cylinder 9, the diameter of the first cylinder 10 is larger than the diameter of the second cylinder 9, an annular yoke 3 is installed in the first cylinder, the outer circle of the yoke matches the inner wall of the first cylinder, the inner circle of the yoke is larger than the outer circle of the second cylinder 9, an annular groove is provided on the annular surface of the yoke, a coil 4 is placed in the annular groove, a brake spring 7 is sleeved on the outer circle of the second cylinder 9, and a plurality of guide shafts 5 are symmetrically installed on the right side of the rear end cover, the right end of the guide shaft is inserted into the suction cup 11, the guide shaft is located on the periphery of the brake spring, the suction cup is sleeved on the main shaft 8, the outer diameter of the suction cup is slightly smaller than the inner diameter of the first cylinder, the main shaft passes through the second cylinder 9, a moving disc 12 is provided on the right side of the suction cup, the moving disc is connected to the main shaft by spline fitting, and a cover plate 13 is provided on the right side of the moving disc , the cover plate is connected to the first cylinder.

[0007] The beneficial effects of the present invention are that a first cylinder and a second cylinder are extended from the rear end cover, and the yoke, spring, suction cup and movable plate are placed therein, and the structure is compact, which is beneficial to reducing the volume of the motor; the yoke, spring, suction cup and movable plate are easy to install, and there is no assembly accumulation error; the suction cup is not connected to the yoke, but is connected to the rear end cover through a guide shaft, so that the yoke structure is simple and easy to manufacture, which is beneficial to reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0009] The symbols in the accompanying drawings respectively represent: 1-machine base, 2-rear end cover, 3-yoke, 4-coil, 5-guide shaft, 7-brake spring, 8-main shaft, 9-second cylinder, 10-first cylinder, 11-suction cup, 12-moving disc, 13-cover plate, 14-inner spline, 15-limiting sleeve, 16-return spring, 17-outer spline, 18-limiting step, 19-screw. DETAILED DESCRIPTION

[0010] The specific implementation of the present utility model will now be described with reference to the accompanying drawings.

[0011] The electromagnetic brake motor includes a main shaft 8, a base 1, a stator fixedly installed in the base (not shown in the drawing), a rotor inserted in the stator (not shown in the drawing), a front end cover (not shown in the drawing) connected to the front end of the base, and a rear end cover 2 connected to the rear end of the base. The main shaft 8 in the rotor is supported by bearings in the front and rear end covers.

[0012] The right side of the rear end cover is respectively extended to the right with a first cylinder 10 and a second cylinder 9. The diameter of the first cylinder 10 is larger than the diameter of the second cylinder 9. An annular yoke 3 is installed in the first cylinder. The outer circle of the yoke matches the inner wall of the first cylinder. A screw 19 is screwed on the wall of the first cylinder. The inner circle of the yoke is larger than the outer circle of the second cylinder 9. An annular groove is provided on the annular surface of the yoke. A coil 4 is placed in the annular groove. A brake spring 7 is sleeved on the outer circle of the second cylinder 9. A plurality of guide shafts 5 are symmetrically screwed on the right side of the rear end cover. The right end of the guide shaft is inserted into the suction cup 11. The guide shaft is located on the periphery of the brake spring. The suction cup is sleeved on the main shaft 8. There is no contact between the suction cup and the main shaft. The outer diameter of the suction cup is slightly smaller than the inner diameter of the first cylinder. The main shaft passes through the second cylinder 9 without contact between them. A movable disc 12 is provided on the right side of the suction cup. The inner spline 14 of the movable disc is sleeved on the outer spline 17 of the main shaft. A cover plate 13 is provided on the right side of the movable disc. The cover plate is sleeved on the external spline, the cover plate has no contact with the external spline, and the cover plate is connected to the first cylinder by screws.

[0013] The function of the guide shaft is to enable the suction cup to move only in the axial direction.

[0014] The braking principle is that when the motor is energized, the main shaft rotates, the coil is energized, the magnetic force of the yoke attracts the suction cup, the suction cup causes the brake spring to contract, and there is no friction between the moving disc and the cover plate.

[0015] When the motor loses power, the spindle rotates by inertia, the coil loses power, the yoke has no magnetic force, and the elastic force of the brake spring causes the suction cup to press the movable plate. The movable plate sticks to the cover plate, and friction is generated between the movable plate and the suction cup, causing the spindle to stop rotating quickly.

[0016] The installation process is:

[0017] Place the yoke into the first cylinder and tighten the screws 19 to secure the yoke.

[0018] Fix one end of the guide shaft to the rear end cover with a nut;

[0019] Put the brake spring on the second cylinder;

[0020] Put the suction cup on the other end of the guide shaft;

[0021] Put the moving disc on the external spline 17 of the main shaft;

[0022] Connect the cover plate to the first cylinder.

[0023] In order to improve the utilization rate of the magnetic yoke, the cross-sectional areas of the outer ring and the inner ring of the magnetic yoke are equal.

[0024] During the rotation of the motor, the moving disc may come into contact with the suction cup or the back cover, causing contact wear and noise. To avoid this, a step 18 is provided at the joint of the external spline and the main shaft, that is, the outer diameter of the main shaft is larger than the outer diameter of the external spline. A return spring 16 is provided on the right side of the moving disc, and a limit sleeve 15 is provided on the right side of the return spring. The limit sleeve is fixedly connected to the external spline. During the rotation of the motor, the moving disc is in contact with the step 18, and there is no contact between the moving disc, the suction cup and the partition. The elastic force of the return spring is much smaller than the elastic force of the brake spring.

Claims

1. An electromagnetic brake motor comprising a main shaft (8), a base (1), and a rear end cover (2), wherein the rear end cover is connected to the base, and wherein: The right side of the rear end cover is provided with a first cylinder (10) and a second cylinder (9) extending to the right. The diameter of the first cylinder (10) is larger than the diameter of the second cylinder (9). An annular magnetic yoke (3) is installed in the first cylinder. The outer circle of the magnetic yoke matches the inner wall of the first cylinder. The inner circle of the magnetic yoke is larger than the outer circle of the second cylinder. An annular groove is provided on the annular surface of the magnetic yoke. A coil (4) is placed in the annular groove. A brake spring (7) is sleeved on the outer circle of the second cylinder. A plurality of guide shafts (5) are symmetrically installed on the right side of the rear end cover. The right end of the guide shaft is inserted into the suction cup (11). The guide shaft is located outside the brake spring. The suction cup is sleeved on the main shaft (8). The outer diameter of the suction cup is slightly smaller than the inner diameter of the first cylinder. The main shaft passes through the second cylinder (9). A movable disc (12) is provided on the right side of the suction cup. The movable disc is connected to the main shaft through a spline. A cover plate (13) is provided on the right side of the brake disc. The cover plate is connected to the first cylinder.

2. The electromagnetic brake motor according to claim 1, wherein: The cross-sectional areas of the outer ring and the inner ring of the yoke are equal.

3. The electromagnetic brake motor according to claim 1, wherein: A step (18) is provided at the joint of the external spline and the main shaft, a return spring (16) is provided on the right side of the movable disc, a limit sleeve (15) is provided on the right side of the return spring, and the limit sleeve is fixedly connected to the external spline. When the motor rotates, the movable disc is in contact with the step (18), and there is no contact between the movable disc and the suction cup and the partition. The elastic force of the return spring is much smaller than the elastic force of the brake spring.

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