JPS62193538A - Disc type synchronous motor - Google Patents

Abstract

PURPOSE:To attempt to lighten the weight and to reduce the thickness by providing a fastening mechanism to a yoke of a stator and to fasten and fix the stator to a structure. CONSTITUTION:On the periphery of a cylindrical rotor 1 a permanent magnet 5 is arranged. A disc-shaped stator 2 is composed of a group of conductor coils 3 facing the permanent magnet 5 of the rotor 1 and a yoke 4, to which they are installed with adhesive, etc., and arranged on both sides of the rotor 1. A screw hole 8 is provided to the stator yoke 4 on one side as a fastening mechanism to install a disc-type synchronous motor to a structure such as a robbot and the like, and the other yoke 4 has a difference 10 in level and is thinly made, where a screw hole 9 is provided as a fastening mechanism. To a mounting portion 12 to a motor, a bolt 11 is used for mounting the motor to the structure. Neither housing nor surplus yoke are provided to keep the clearance between the rotor and the stator, so that the motor can be made lighter and thinner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a permanent magnet type disk-type synchronous motor having a disk-shaped stator and rotor used in robots 1, etc., and in particular, to Concerning the composition.

Conventional technology A permanent magnet disk-type synchronous electric motor with a disk-shaped stator and rotor! IIJI is capable of generating a very large torque and is often used in direct drive systems such as so-called robots.

However, compared to a motor using a speed reduction mechanism, the weight of the motor is generally large relative to the output torque, and performance limitations in this respect are a major drawback.

FIG. 2 is a partial cross-sectional view of a conventional disk-type synchronous electric rotor. 1 is a disk-shaped rotor, and a large number of permanent magnets 5 are fixed around the periphery so that the polarity changes alternately in the circumferential direction. and
The stator 2 is placed opposite the permanent magnet 5 with a slight air gap.
The stator 2 has a structure in which a conductor coil group 3 is attached to a disk forming a yoke 4 made of an iron core by adhesive or the like. Outer periphery 6
are bent and brought into contact with each other, and the cross section of this yoke 4 is the second
As shown in the figure, it is formed in a U-shape, and the gap between the rotor 1 and the stator 2 is maintained by the contact of the outer peripheral portion 6. Further, a housing 7 is fixed to the outer surface of the yoke 4, forming a disk type synchronous motor. When the disk type Domei electric motor is assembled into a structure such as a robot, the housing 7 is fixed to the structure with bolts or the like.

Problems to be Solved by the Invention Previously) As mentioned earlier, the disk type synchronous electric machine has the disadvantage that the motor is severely damaged in relation to its output torque.
When using the disk type synchronous electric VJ machine in a direct drive system, it is desirable that it be as light as possible. From the perspective of reducing the weight of this electric motor, the bent portions provided on the outer circumference 6 of the housing 7 and the disk of the yoke 4 in conventional disc-type synchronous motors have no bearing on the function 2 of the synchronous motor. . That is, the magnetic flux emitted from the permanent magnet 5 passes through the yoke 4 on the conductor coil group 3 and returns to the permanent magnet 5, and the outer circumference 6 of the disk of the yoke 4 is connected to the path of this magnetic flux. It has no relation to this, and is merely provided to provide a gap between the stator 2 and rotor 1.

Moreover, the housing 7 is also only for holding these stators 2 in a fixed position. However, the conventional disc-type synchronous motor has the drawback of increasing its weight due to the members not directly related to the function 2 of the synchronous motor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the drawbacks of the above-mentioned conventional techniques and to obtain a lightweight and thin disk-type synchronous electric VJ machine.

Means for Solving the Problems The present invention provides a permanent magnet type disk-type synchronous electric VJ machine having a disk-shaped stator and rotor, in which a fastening mechanism is provided to the yoke of the stator, and the fastening mechanism allows the synchronous motor to The above-mentioned problem was solved by fastening and fixing the stator to a structure in which the stator is incorporated, and forming a gap between the stator and the rotor by the fastening and fixing, so that the stator functions as an electric motor.

Since the working rotor is composed of permanent magnets, the stator is usually attracted to the permanent magnets and integrated therewith. and,
If the stator is fastened and fixed to the structure into which the disk-type synchronous motor is to be installed using the fastening mechanism provided on the stator yoke, the stator is fastened to the structure, creating a gap between the stator and rotor, and synchronization is achieved. It can also function as an electric motor. Therefore, there is no need for an extra yoke portion through which magnetic flux does not pass (the bent portions that contact each other on the outer periphery of the disk of the yoke in a conventional disk-type synchronous motor), and furthermore, there is no need for a housing. Since the rotor stator requires a minimum number of components, the disk type synchronous motor can be made lighter and thinner.

Embodiment FIG. 1 shows a partial sectional view of a disk-type synchronous motor according to an embodiment of the present invention, and the same members as in FIG. 2 are denoted by the same reference numerals. 1 is a disk-shaped rotor, and permanent magnets 5 are arranged around the periphery so that the magnetic poles alternate in the circumferential direction; 2 is a disk-shaped stator; the stator 2 is connected to the permanent magnets of the rotor 1; 5 and a yoke 4 to which the conductor coil group 3 is attached by adhesive or the like, and are arranged on both sides of the rotor 1. The yoke 4 of one stator is provided with a large number of screw holes 8 as a fastening mechanism for attaching the disc type synchronous motor to a structure such as a robot, and the yoke 4 of the other stator is provided with a step 10. The yoke 4 has an extended portion which is thin and has a large diameter disk, and the extended portion is provided with a large number of holes 9 as a fastening mechanism.

The disk-type synchronous motor of this embodiment has the above-mentioned configuration, and when the disk-type synchronous motor is not attached to a structure such as a robot, the stators 2, 2 are attracted to the permanent magnets 5 of the rotor 1. and become one. Therefore, the magnetic flux of the permanent magnet 5 is the same as that of the conductor coil group 3. Since the path of magnetic flux is a closed path through the yoke 4 to the permanent magnet 5, the permanent magnet 5 will not be demagnetized.

On the other hand, when attaching the disc-type synchronous electric @ machine to a structure, the rotor shaft is fixed to the drive shaft of the structure, and bolts are attached to the motor mounting part 12 made of a light alloy such as aluminum provided on the structure. 11 and the screw hole provided in the yoke 4, one of the yoke 4 is tightened and fixed, and the other yoke 4 is fitted with the step 10 provided on the yoke 4 to the end of the motor mounting part. , the bolt 11 is inserted through the hole 9 provided in the extension of the yoke 4.
Then, the yoke 4 is fastened and fixed to the electric revision part 12.

As a result, the stator 2 is separated from the permanent magnet surface of the rotor 1 by fastening and fixing the yoke 4 of the stator 2 to the electric motor 1FllIa attachment part 12, and a gap is formed. By forming this gap, the function of the motor of the disc-type synchronous motor is increased by 17, and since one motor is required with the minimum configuration of rotor 1 and stator 2, it can be made lighter and thinner.

In the above embodiment, a screw hole 8 is provided in the yoke 4 as a fastening mechanism.
．． Although holes 9 and the like are provided, bolts may also be inserted into the yoke 4.

Effects of the Invention As described above, the present invention takes advantage of the simple structure of a disk-shaped stator and a permanent magnet type disk-type synchronous motor that waits for the rotor.
The electric motor can be made lighter and thinner because it is constructed with only the minimum configuration as shown in FIG.

Furthermore, until the disk-type synchronous motor is attached to a structure, the stator is suction-bonded to the permanent magnet of the rotor, so there is no demagnetization.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG. 2 is a partial sectional view of a conventional disk type synchronous motor. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Stator, 3... Conductor coil group, 4... Yoke, 5... Permanent magnet, 8... Screw hole, 9... Hole, 10...・Step, 11... bolt,
12...Electric motor mounting part.

Claims (1)

[Claims] In a permanent magnet disk-type synchronous motor having a disk-shaped stator and a rotor, a fastening mechanism is provided on the yoke of the stator, and the fastening mechanism fastens and secures the stator to a structure in which the synchronous motor is incorporated. A disk type synchronous electric motor that functions as an electric motor by forming a gap between the stator and the rotor by fastening and fixing.