JPS61251445A - Normal/reverse rotation motor - Google Patents

Abstract

PURPOSE:To obtain an energy-saving type normal/reverse rotation motor which can be instantaneously started with a compact structure by coupling a reversible wheel with a flywheel mounted with a rotor, and interposing a clutch between the wheels and an output shaft. CONSTITUTION:A stator coil 4 is mounted on the inner peripheral surface of a case 1 and a rotor core 6 mounted on a flywheel 5 is opposed to the inner peripheral side. A reversible wheel 18 which rotates reversely to the flywheel 5 is coupled through a planetary gear 16 with the flywheel 5. The flywheel 5 is mounted through normal rotation clutches 9-12 on one output shaft 14, and a reversible wheel 18 is mounted through reversible clutches 21-26. Thus, the shaft 14 can be rotated normally and reversely by merely switching the clutch.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a forward/reverse motor useful as a drive source for various hydraulic units, high-speed, high-force actuators, and other screw presses.

(Prior art) Conventionally, in order to switch between forward and reverse rotation in a forward/reverse motor, it is necessary to switch the direction of the current flowing to the stator coil, or to switch the gear transmission mechanism provided outside the motor body. It was common to do so.

(Problems to be Solved by the Invention) In the conventional forward/reverse motor as described above, when the drive shaft reaches the set speed when directly started or reversed by single-flow control, such as by introducing current or reversing the direction of current, the drive shaft cannot reach the set speed. It takes a long time to accelerate, and a large current flows during the acceleration time. In addition, with this current control method, if a load is applied intermittently, the motor capacity must be set to the maximum value of the load.
Therefore, there is a problem that an unnecessarily large motor is required and electric energy consumption increases. In order to compensate for this drawback, the motor rotates the flywheel via a small pulley and belt to store kinetic energy, and the flywheel is installed close to the flywheel to instantaneously start the flywheel and instantaneously release the kinetic energy at the same time. However, this method requires a large space and is therefore applicable to a limited number of objects as a driving source.

In the case of reverse rotation, a reverse rotation wheel is rotated from the flywheel via a gear, and a clutch attached to this is used to start a rapid reverse rotation, but in such a case, a larger space is required and the number of parts is limited.

The number of mounting stands is also large, and the overall weight is also large.

The present invention eliminates the above-mentioned problems and provides a compact, energy-saving, forward-reverse motor that is capable of instantaneous start-up and reverse rotation of a drive shaft and instantaneous high-output work.

(Means for Solving the Problems) A forward/reverse motor according to the present invention includes a case in which a stator coil is fixed to the inner periphery, and a case that is rotatable with respect to an output shaft within the case and has a stator coil fixed to the outer periphery. A flywheel having a fixed rotor core facing the stator coil, and a forward rotation clutch and a reverse rotation clutch respectively installed between the flywheel and the output shaft within the case. More specifically, it includes a case with a stator coil fixed to its inner periphery, and a rotor core that is rotatably provided within the case with respect to an output shaft and faces the stator coil on its outer periphery. a flywheel fixed to the flywheel, a reverse rotation wheel connected to the flywheel via a gear mechanism and rotating in the opposite direction to the flywheel, and a normal rotation clutch installed between the flywheel and the output shaft. and a reverse rotation clutch mounted between the reverse rotation wheel and the output shaft.

(Example) Next, an example of the present invention will be described with reference to one drawing.

The accompanying drawing is a longitudinal sectional view of a forward/reverse rotation motor according to an embodiment of the present invention. Stator coil 4 on the inner circumference of motor case 1
is fixed, and the rotor core 6 is fixed to the outer circumference of the seven-wheeled wheel 5 inside the case and faces the inside of the stator coil 4. The flywheel 5 is rotatably supported within the case by bearings 13 and 19 located at the center of the case l. A forward rotation clutch and a reverse rotation clutch are attached to the flywheel 5 via a planetary gear mechanism. First, the clutch for normal rotation will be explained.

A clutch boss 11 is fixed to the inner shaft end of the output shaft 140 case, and a normal rotation side cylinder 10 is fixed to the end surface of the seven-wheel drive wheel 5 outside the clutch boss. In the illustrated embodiment, a cylinder cover 8 is fixed to the end of the cylinder 10, and the cylinder 10 and the cylinder cover 8 form an annular cylinder chamber. 7 is a hydraulic line connected to this annular cylinder chamber, and 13 is a bearing that pivotally supports the cylinder 10 in the case l. A piston 9 is housed within the annular cylinder chamber, and a friction plate group 12 is disposed between the piston 9 and the flywheel 5 within the cylinder chamber.

The clutch mechanism for reverse rotation is provided on the opposite side of the flywheel 5 from the clutch mechanism for normal rotation described above, but both are inside the case 1. First, an internal gear 15 is fixed to the flywheel 5, and a plurality of pins 17 are attached to the case 1 inside the internal gear. each bottle 171
At C, a planetary gear 16 that meshes with the # orientation gear 15 is pivotally supported via a bearing 20 . A bearing 28 is attached to the output shaft 14.
A reversing wheel 18 with a sun gear is pivotally supported and meshed with the planetary gear 16. 19 and 30 are bearings installed between the case 1 and the flywheel 5 and between the output shaft 14 and the flywheel 5, and 21 is a bearing installed between the reversing wheel 18 and the flywheel 5. As shown in the figure, the output shaft 14 has a reverse clutch boss 2.
3 is installed, and this clutch boss 23 and reverse rotation wheel 1
8, a reverse rotation side friction plate group 22 is installed. Also on the output shaft 14. Reverse cylinder 26 via bearing 29
Piston 2 is pivotally supported and housed in this cylinder 26.
A clutch actuator 24 is pivotally supported at the end sVc of the clutch via a bearing 27 . Reference numeral 31 denotes a hydraulic line connected to the cylinder chamber on the reverse side, and this hydraulic pressure causes the clutch A mover 24 to press the friction plate group 22 via the piston 25, thereby operating the clutch.

With this configuration, when a rotating magnetic field is generated in the stator coil 4 by, for example, three-phase alternating current, the rotor core 6 and flywheel 5 rotate at a predetermined number of rotations. While this flywheel 5 is rotating.

When compressed fluid is supplied through line 7 from the inlet side of the figure,
While the fluid is under pressure, the piston 9 in the forward rotation side cylinder chamber
moves to the left in the figure and presses the friction plate group 12, thereby transmitting rotational torque from the flywheel 5 to the clutch boss 11 via the cylinder lO and the friction plate group 12.
'L, the output shaft 14 instantaneously enters the normal rotation state.

Next, when the pressure of the supply fluid from the inlet side is released and compressed fluid is supplied from the B side through the line 31t, the piston 25 of the cylinder 26 moves to the right in the figure while the pressure of this fluid remains. Move 1. Press the friction plate group 22. As a result, the rotational torque of the reverse rotation, which has been applied to the internal gear 15, the planetary gear 16, and the reverse rotation wheel 18, is transmitted from the 7-line wheel 5 to the output shaft 14 via the clutch boss 23t, and instantaneously becomes a reverse state. As the above-mentioned clutch mechanism, various types such as pneumatic, hydraulic, or electromagnetic types can be adopted.

The motor type is also not limited to a three-phase electric motor.

(Effects of the Invention) As explained above, according to the present invention, since the motor has a flywheel effect, it is an energy-saving type and can have a capacity of 1/4 to 1/6 of a conventional motor. Furthermore, it is possible to instantaneously start the drive shaft in forward rotation and instantaneous reverse rotation, and the entire motor can be housed within the case, resulting in a very compact forward and reverse rotation motor.

The present invention is applicable to a wide range of fields where hydraulic power is used as a drive source for hydraulic units, such as greatly reducing the capacity of electric motors, omitting pulp, preventing heat generation, saving energy, greatly saving oil volume, and saving piping. Applicable. By adding a brake, screw, etc. to the shaft, it can be applied to a wide range of fields, such as for high-speed, high-force rotation angles, as a drive source for linear actuators, or as a drive source for screw presses.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view of a forward/reverse motor according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Case, 4... Stator coil, 5... Flywheel, 6... Rotor core, 10.26... Cylinder, 9.25... Piston, 11.23...・Clutch boss. 12.22...Friction plate group, 25...Compression spring,
14... Output shaft, 15... Internal gear, 1
6... Planetary gear, 18... Reversing wheel with sun gear. Sub-agent Patent Attorney Rikichi Somekawa

Claims (1)

[Claims] a case having a stator coil fixed to its inner periphery; a flywheel which is rotatably provided within the case with respect to an output shaft and has a rotor core fixed to its outer periphery facing the stator coil; and the flywheel. a reverse rotation wheel connected to the wheel via a gear mechanism and rotating in the opposite direction to the flywheel; a normal rotation clutch installed between the flywheel and the output shaft; the reverse rotation wheel and the output. A forward/reverse rotation motor characterized by having a reverse rotation clutch installed between the shaft and the shaft.