JPH04108370U - Brake lead wire wiring structure of AC motor with electromagnetic brake device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a highly reliable brake lead wire wiring structure that can be provided at low cost by drilling and is easy to assemble. [Structure] A brake lead wire wiring structure for an AC motor with an electromagnetic brake device, which is located outside the outer circumferential position of the recess of the excitation core 12 in which the excitation winding 10 of the electromagnetic brake device is wound and accommodated. , the brake lead wire 24 pulled out from the surface layer of the excitation winding 10 is inserted into the insertion hole 38, which is fitted inside the outer periphery of the excitation core 12 and is bored in the axial direction, and is connected to any of the AC motors by passing the brake lead wire 24 pulled out from the surface layer of the excitation winding 10. The brake lead wire at the end of the AC motor can be connected to the inner end of the external connector.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on the structure of an electromagnetic brake device for AC motors such as AC servo motors. In particular, the present invention relates to a brake lead wire wiring structure of an electromagnetic brake device.

0002

[Conventional technology]

Conventionally, the brake valve was installed at the end of the excitation winding in the brake device of an AC motor. Pull out the lead wire from the bottom of the winding toward the bottom of the iron core, or connect it to the brake device and AC power. Through the gap between the motor's stator windings or, if this gap is too narrow, the block. A wiring structure has been adopted in which a groove is provided on the outer periphery of the rake device and the wiring is inserted into the groove.

0003

[Problem that the idea aims to solve]

However, when drawing the lead wire from the bottom of the winding toward the bottom of the iron core, the excitation When molding agent is injected into the inner peripheral surface of the winding to protect the winding, the above lead wire is drawn out. Molding agent leaks from the area. For this reason, separate parts such as bushes were required. This book When passing through the gap between the stator and the stator mentioned above to eliminate the The brake lead insulation was susceptible to damage during repeated activation of the brake system. . When assembling the motor by providing a groove on the outer periphery and passing the brake lead wire through the groove, In this case, the brake lead wire may come out of the groove and the insulation is likely to be damaged as described above. It is impossible to create a groove on the outer periphery of the brake device with simple drilling, and it is costly. Strike prices were also high. Furthermore, it is difficult to store brake lead wires that are too long. Connect the short brake lead wire to the inner end of the external connector that can be connected to an external power source. The work was difficult. Therefore, the present invention can be provided at low cost by drilling and is easy to assemble. The purpose is to provide a highly reliable brake lead wire wiring structure.

0004

[Means to solve the problem]

In view of the above-mentioned purpose of the invention, the present invention has been developed to brake an AC motor with an electromagnetic brake device. - Key lead wire wiring structure for winding and accommodating the excitation winding of the electromagnetic brake device. A position outside the outer periphery of the recess of the excitation core, and located outside the outer periphery of the excitation core. The wire is pulled from the surface layer of the excitation winding through the insertion hole that is fitted in the inner position and is drilled in the axial direction. Insert the brake lead wire that comes out and connect it to one of the shaft ends of the AC motor. Connect the brake lead wire to the external connector at the end of the AC motor. An electromagnetic brake device characterized by having a wiring path that can be connected to the inner end of the Provides a brake lead wire wiring structure for an attached AC motor.

[0005]

[Effect]

The molding agent injected to protect the windings will not leak from the core, and , a winding in which the lead wire is attached to the excitation core so as not to damage the lead wire. Instead of pulling out the lead wire from the surface layer of the iron core and pulling it out to the outer periphery of the iron core, A position outside the outer periphery of the recess of the core that accommodates the winding, and outside the core. It is inserted into an insertion hole provided inside the circumference and drilled in the axial direction. Lead is pulled out from the surface layer of the winding once the molding agent is injected into the winding. This is to prevent leakage toward the bottom of the wire without using a bush, etc. Furthermore, if the insertion hole is inserted through the gap between the stator and the iron core, Or, if it is placed along the groove provided on the outer periphery of the iron core, it may cause damage during repeated operation of the brake system. This is to prevent such a decrease in reliability, as the insulation may be damaged.

[0006]

【Example】

Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings. Figure 1 is a cross-sectional view of an AC motor equipped with a brake device, and Figure 2 is a sectional view of an AC motor equipped with a brake device. FIG. 2 is a partial cross-sectional view of the brake device with a wire inserted therethrough.

[0007] First, the schematic structure of an AC motor will be explained with reference to FIG. in casing 50 A stator 52 is fixed, and a winding 54 is wound around the stator 52. casing 50 A rear casing 64 is fixed to the rear of the casing by screws (not shown). 50 and the rear casing 64 by said bearing 60 and rear bearing 62. , each bearing a front shaft 58 and a rear shaft 59 of a rotor shaft having a rotor core 56. . Therefore, when current flows through the winding 54, the rotor rotates due to the action of the generated magnetic field. .

[0008] A device that applies a braking force to the rear shaft 59 in order to brake the rotation of this rotor is a brake. This is a key device, and the structure of this device will be explained. installed in the excitation iron core (core) 12 An insulated brake excitation winding 10 is wound in the recess, and this winding 10 is used for excitation. It is installed inside the electric motor in the axial direction of the magnetic core 12. The winding 10 has a lead A line 24 is provided.

[0009] On the other hand, the end plate 14, which is a fixed brake pad, is connected to the excitation core 12 via the cylindrical member 34. and is fixed with screws 32. A movable brake is provided between the end plate 14 and the excitation core 12. Fixed plate 18 and armature 22, which are pads, and two friction plates, which are brake plates. 16 and 20 are arranged in parallel alternately. These two friction plates 16 and 20 are fixed to the rear shaft 59. It engages with the brake spline 36 that is attached to the brake spline 36, and is slidable in the axial direction. more than The friction plates 16, 20, the fixed plate 18 and the armature 22 are operated by a braking force generating spring (not shown). and is pressed against the end plate 14. The two friction plates 16 and 20 are made of magnetic material, so When a current is applied to the brake excitation winding 10, it overcomes the biasing force of the braking force generating spring and generates 2 The friction plates 16, 20 are sucked in the direction away from the end plate 14, and the friction plates 16, 20 and the end plate 14 are Frictional force no longer acts between the fixed plate 18 and the armature 22, and the braking is released. Ru. In the above, the reason why two friction plates are used is to increase the braking torque. , even one sheet is possible.

0010 As mentioned above, the brake is used to apply or release braking force to the rotor shaft. Current must be turned on or off in the rake excitation winding 10. child The brake lead wire 24 that conducts the current is coated and is perforated in the excitation core 12. The electric motor is inserted through the insertion hole 38 (FIG. 2) in advance before assembly of the electric motor. This insert The through hole 38 is located between the outer periphery of the excitation core 12 and the recess housing the brake excitation winding 10. It has an inner diameter somewhat larger than the diameter of the drilled and coated brake lead wire 24. Figure 2 shows this situation. Also, the brake lead wire 24 is attached to the armature 22. A recess 40 is provided with a size that allows the passage of the recess.

[0011] In this way, the brake lead wire 24 that came out behind the excitation core 12 is connected to the hole in the rear casing 64. (not shown) and leads out to the rear end of the motor, and is therefore connected to a suitable intermediate connector 28. can be easily connected outside the motor. This intermediate connector 28 is connected to an external power supply (Fig. electrically through the inner end of external connector 30 and other lead wire 42 that can be connected to (not shown) It is connected. The other lead wire 42 passes through the rear casing 64 and casing 50. The intermediate connector 28 is connected to the intermediate connector 28 by passing through a hole (not shown). brake lee A cover 66 is fixed to the rear end of the casing 50 to protect the power wire 24 and intermediate connector 28. be done.

0012 When wiring the brake lead wire 24 of the brake excitation winding 10 as described above, for example In this case, it is not allowed to pass through the narrow gap 26 between the winding 54 of the stator 52 and the brake device as in the conventional case. That's enough. In addition, since there are no holes in the part of the iron core that corresponds to the bottom of the winding, the motor There is no leakage when the lubricant is injected, and a bush is not required.

[0013]

[Effect of the idea]

As is clear from the above explanation, according to the present invention, the brake lead wire is inserted through the hole. The insulation may be damaged when the brake equipment is operated. In addition, the above holes can be easily machined with a drill at low cost, and are easy to assemble. We propose a brake lead wire wiring structure for an AC motor with an electromagnetic brake device that is easy to stand up. It becomes possible to provide

[Brief explanation of drawings]

FIG. 1 is a sectional view of an AC motor equipped with a brake device having a brake lead wiring structure according to the present invention.

FIG. 2 is a partial cross-sectional view of a brake device with a brake lead wire wiring structure according to the present invention.

[Explanation of symbols]

10...Brake excitation winding 12...Excitation core 14...End plate 16, 20...Friction plate 18…Fixing plate 22...Armature 24…Brake lead wire 26…Gap 28…Intermediate connector 30...External connector 32...screw 34...Cylindrical member 36...Brake spline 38…hole 40…Concavity 50...Casing 52...Stator 54...Winding wire 56...Rotor core 64…Rear casing 66…Cover

Claims (1)

[Scope of utility model registration request] 1. A brake lead wire wiring structure for an AC motor with an electromagnetic brake device, wherein the wire is located outside the outer periphery of a recess of an excitation core in which an excitation winding of the electromagnetic brake device is wound and housed. , a brake lead wire pulled out from the surface layer of the excitation winding is inserted into an insertion hole that is fitted inside the outer periphery of the excitation core and is bored in the axial direction, and then passed through the insertion hole to be connected to one of the shaft ends of the AC motor. Brake lead wire wiring for an AC motor with an electromagnetic brake device, characterized in that a wiring route is constructed in which the brake lead wire can be connected to the inner end of a connector for connection to the outside at the end of the AC motor. structure.