JPH09275667A - Output torque variable motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an output torque variable motor which performs a plurality of jobs at the same time and which has its output torque characteristics easily adjusted. SOLUTION: When a plunger of a cylinder 62 is pulled and then a third rotor 34 is moved toward a first motor section 11, a female spline formed on one end of a shaft 35 of the third rotor 34 is fit in with a male spline formed on one end of a shaft 15 of a first rotor 14, and the shaft 35 is integrally incorporated with the shaft 15. On the other hand, when a plunger of a cylinder 63 is pulled and then the third rotor 34 is moved toward a second motor section 21, a male spline formed on the other end of the third rotor 34 is fit in with a female spline formed on one end of a shaft 25 of a second rotor 24, and the shaft 35 is integrally incorporated with the shaft 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable output torque type motor, and more particularly to a variable output torque type motor having a plurality of outputs and capable of changing output torque characteristics.

[0002]

2. Description of the Related Art The structure of a conventional induction motor is shown in FIGS.
Shown in A stator 1 composed of a laminated body of a large number of ring-shaped members is housed in a cylindrical frame 2, and a rotor 3 is inserted inside the stator 1. End brackets 7 and 8 that pivotally support a shaft 6 of the rotor 3 are fixed to both ends of the stator 1 via bearings 4 and 5, respectively, by bolts 9.

[0003]

[0005] Such a motor is
It has an inherent output torque characteristic determined by the structure of the stator 1, the rotor 3, etc., and the characteristic could not be easily changed. Therefore, one motor does only one job, and when doing multiple jobs at the same time, it is necessary to use multiple motors corresponding to the number of jobs, and the amount of work and output characteristics. There was a problem that the motor had to be replaced in order to change.

The present invention has been made to solve such problems, and an object thereof is to provide a variable output torque type motor capable of simultaneously performing a plurality of jobs and easily adjusting an output torque characteristic. And

[0005]

A variable output torque type motor according to the present invention has a first motor section having a first rotor and a second rotor section coaxially with the first rotor. A second motor section and a third rotor which is coaxial with the first and second rotors and is movable in the axial direction, and is arranged between the first motor section and the second motor section. A third motor unit, and a moving device that moves the third rotor in the axial direction to selectively connect the shaft of the third rotor to one of the shaft of the first rotor and the shaft of the second rotor. It is equipped with.

The shaft of the third rotor, the shaft of the first rotor, and the shaft of the second rotor are formed by fitting a male spline and a female spline formed at the ends facing each other. Can be connected.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a variable output torque type motor according to an embodiment of the present invention. The third motor unit 3 is provided between the first motor unit 11 and the second motor unit 21.
1 is arranged, and these motor parts 11, 21 and 31 are located coaxially with each other.

As shown in FIG. 2, each of the first to third motor parts 11, 21 and 31 has a cylindrical first shape.
-The 1st-3rd stators 13, 23 and 33 which consist of the laminated body of many ring-shaped members accommodated in the 3rd frames 12, 22 and 32, and the 1st-3rd stators 13,
First to third rotors 1 inserted inside 23 and 33
4, 24, and 34. First frame 12
An end bracket 41 is fixed to one end of the first frame 12 by a bolt 45, and an intermediate bracket 42 is interposed between the other end of the first frame 12 and one end of the third frame 32.
An intermediate bracket 43 is interposed between the other end of the third frame 32 and one end of the second frame 22, and an end bracket 44 is provided at the other end of the second frame 22 with a bolt 4.
It is fixed by 6.

The shaft 15 of the first rotor 14 is axially supported by bearings 47 and 48 arranged on the end bracket 41 and the intermediate bracket 42, and the shaft 35 of the third rotor 34 is supported by the intermediate bracket 42 and the intermediate bracket 42. Bearings 49 and 50 arranged at 43
The shaft 25 of the second rotor 24 is supported by bearings 51 and 52 arranged on the intermediate bracket 43 and the end bracket 44.

Disc springs 53 and 54 are provided between the end bracket 41 and the bearing 47 and between the end bracket 44 and the bearing 52, respectively, and between the bearings 48 and 49 and between the bearings 50 and 51. Have coil springs 55 and 56, respectively. The disc springs 53 and 54 and the coil springs 55 and 56 balance the first rotor 14, the third rotor 34, and the second rotor 24, and the third rotor 3
The fourth shaft 35 is separated from the shaft 15 of the first rotor 14 and the shaft 25 of the second rotor 24.

The shaft 35 of the third rotor 34 has a disk member 61 having conical surfaces formed on both sides thereof.
Has been fixed. A pair of cylinders 62 and 63 are provided in the third frame 32 corresponding to the disc member 61, and when the plunger of one cylinder 62 is extended, the plunger contacts the one conical surface of the disc member 61. When the disk member 61 is moved in the direction of the first motor portion 11 together with the shaft 35 while contacting, and the plunger of the other cylinder 63 is extended, the plunger comes into contact with the other conical surface of the disk member 61 and the disk member 61. Is moved in the direction of the second motor section 21 together with the shaft 35. The disk member 61 and the cylinders 62 and 63 constitute the moving device of the present invention. As the cylinders 62 and 63, various cylinders such as electric cylinders and hydraulic cylinders can be used.

A female spline 64 as shown in FIG. 3 is formed at one end of the shafts 15, 25 and 35 of the first, second and third rotors 14, 24 and 34, respectively, and at the other end thereof. Each has a male spline 65 as shown in FIG. The female spline 64 and the male spline 65 are formed in shapes that can be fitted to each other, and the female spline 64 formed at one end of the shaft 35 of the third rotor 34 is the same as that of the first rotor 14. The male spline 65 formed at the other end of the shaft 35 of the third rotor 34 faces the male spline 65 formed at the other end of the shaft 15 and is formed at one end of the shaft 25 of the second rotor 24. It faces the female spline 64 formed on the.

Therefore, when the plunger of the cylinder 62 is extended to move the third rotor 34 in the direction of the first motor portion 11, a female member formed at one end of the shaft 35 of the third rotor 34 is formed. The mold spline 64 is the first rotor 1
The shaft 35 is integrated with the shaft 15 by fitting into the male spline 65 formed at the other end of the shaft 15 of No. 4. With this configuration, the rotation torque of the third rotor 34 is added to the rotation torque of the first rotor 14, so that the output of the first motor unit 11 is improved. The cylinder 6
When the second plunger is retracted, the elastic force of the coil spring 55 causes the third rotor 34 to return to the initial position, and the shaft 35 is disconnected from both the shafts 15 and 25.

On the other hand, when the plunger of the cylinder 63 is extended to move the third rotor 34 toward the second motor portion 21, a male member formed on the other end of the shaft 35 of the third rotor 34 is formed. A female spline 64 having a mold spline 65 formed at one end of the shaft 25 of the second rotor 24.
Then, the shaft 35 is integrated with the shaft 25. By doing so, the rotational torque of the third rotor 34 is added to the rotational torque of the second rotor 24,
The output of the second motor section 21 is improved. When the plunger of the cylinder 63 is retracted, the elastic force of the coil spring 56 causes the third rotor 34 to return to the initial position, and the shaft 35 is disconnected from any of the shafts 15 and 25.

For example, in a forklift truck, the shaft 1 of the first motor section 11 of the motor according to this embodiment.
If 5 is connected to a hydraulic pump for cargo handling work and the second motor unit 21 is used as a motor for traveling the vehicle, one motor can perform two jobs at the same time and the cylinders 62 and 63 It is possible to selectively realize the improvement of cargo handling performance and the improvement of traveling performance by operation.

The first to third motor parts 11, 21 and 31 may be connected to each other having the same output, or motor parts having different outputs may be connected to each other. Further, the respective motor units 11, 21 and 31 can be operated under optimum conditions according to their applications by a controller (not shown).

In the above embodiment, three motor units are connected, but four or more motor units can be connected in the same manner. In this case, the output torque characteristic of the motor can be changed in multiple stages.

[Brief description of drawings]

FIG. 1 is a perspective view showing a variable output torque motor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a variable output torque type motor according to the embodiment.

FIG. 3 is a perspective view showing one end of a motor shaft used in the motor of the embodiment.

FIG. 4 is a perspective view showing the other end of the motor shaft used in the motor of the embodiment.

FIG. 5 is a perspective view showing a conventional motor.

FIG. 6 is a sectional view showing a conventional motor.

[Explanation of symbols]

 11 1st motor part 12 1st frame 13 1st stator 14 1st rotor 15, 25, 35 shaft 21 2nd motor part 22 2nd frame 23 2nd stator 24 2nd rotor 31 1st 3 motor part 32 3rd frame 33 3rd stator 34 3rd rotor 41,44 End bracket 42,43 Intermediate bracket 45,46 Bolt 47-52 Bearing 53,54 Disc spring 55,56 Coil spring 61 Disc member 62 , 63 cylinder 64 female spline 65 male spline

Claims (2)

[Claims] 1. A first motor section having a first rotor, a second motor section having a second rotor positioned coaxially with the first rotor, and the first and second rotors. A third motor portion that is coaxially located and that is axially movable, and that is disposed between the first motor portion and the second motor portion; A moving device for axially moving the rotor to selectively connect the shaft of the third rotor to one of the shaft of the first rotor and the shaft of the second rotor. Variable output torque motor. 2. The shaft of the third rotor and the first rotor
2. The shaft of the rotor and the shaft of the second rotor are connected by fitting a male spline and a female spline formed at ends facing each other, respectively. Motor.