JPH0134540Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor with a one-way clutch.

Figure 1 is a cross-sectional view of the main parts of a motor with a one-way clutch that has been implemented in the past. A one-way clutch 8 is attached to the shaft 5, and this one-way clutch 8 also serves as a bearing for the output shaft 5.

In addition, a small gear provided on the rotor shaft 2 of the motor 1,
A gear train of an appropriate number of stages (not shown) is inserted between the output shaft gear 7 and the geared motor. Also, 3 is the case of the reducer directly connected to the motor,
4 is a clutch housing integrally provided on the output shaft side of the reducer case, and 6 is a rear bearing plate of the reducer.

FIG. 2 is a sectional view of a main part of the one-way clutch 8. In Figure 2, 8-1 is the outer ring of the clutch.
A plurality of cam-shaped inner peripheral portions 8-2 whose radius gradually changes in a certain direction are provided on the inner peripheral surface thereof,
A roller 8-3 is inserted between the cam-shaped inner surface 8-2 and the output shaft 5, and the outer diameter of the roller 8-3 is equal to the maximum radius of the cam-shaped inner surface 8-2 and the output shaft. 5, and larger than the difference in outer diameter between the minimum radius portion of the inner surface portion 8-2 and the output shaft 5. The roller 8-3 is constantly moved by the tension of the spring 8-4 inserted between the retainer 8-5 and the roller 8-3 to arrange the roller 8-3 at approximately equal pitches along the outer periphery of the output shaft. The cam-shaped inner surface 8-2 of the outer ring 8-1 is pressed in the direction in which the radius becomes smaller (clockwise in FIG. 2).

In the conventional motor with one-way clutch shown in FIG. 1, the one-way clutch 8 shown in FIG. When the clutch assembly consisting of the outer ring 8-1, roller 8-3, retainer 8-5, and spring 8-4 is press-fitted, and the output shaft 5 is further installed, the roller 8-3 of the one-way clutch 8 is connected to the roller of the output shaft 5. It is designed to function as a bearing.

The operation of the one-way clutch 8 is shown in FIG. 2. When the outer ring 8-1 of the clutch is fixed and the output shaft 5 rotates counterclockwise, the roller 8-3
moves in the direction in which the radius of the inner surface 8-2 of the outer ring increases (counterclockwise in the figure) against the pressure of the spring 8-4, and the output shaft 5 can freely rotate. On the other hand, when the output shaft 5 tries to rotate clockwise, the roller 8-3 moves in a direction where the radius of the inner surface 8-2 of the outer ring 8-1 becomes smaller (clockwise in the figure), and the roller 8-3 acts as a wedge between the output shaft 5 and the inner surface 8-2 of the outer ring 8-1, and the output shaft 5
It works to prevent the rotation of. That is, in the motor with a one-way clutch shown in FIG. 1, the one-way clutch 8 shown in FIG. 2 is attached to the output shaft 5 of the reducer, so the rotation of the output shaft 5 is restricted to only one direction. .

The motor with a one-way clutch shown in FIG. 1 is effective when used in certain types of hoisting devices.
In other words, in some types of hoisting devices, the weight of the load always acts on the output shaft of the drive motor as a rotational force in the opposite direction during operation, so the hoisting device is operated intermittently to gradually hoist the load. If the motor is stopped, the hoisting device will be reversed by the rotational force in the opposite direction acting on the output shaft, causing the cargo to fall. In such a case, if the motor with the one-way clutch shown in Figure 1 is used as the drive motor for the hoisting device, the reverse rotational force generated by the load when the motor is stopped will be in the direction of blocking the one-way clutch, thereby preventing the load from falling. It can be prevented.

However, the motor with a one-way clutch shown in FIG. 1 has various problems because the one-way clutch 8 is attached to a speed reducer to form a geared motor, and its use is restricted.

The first problem is that the direction of rotation is determined by the installation direction of the one-way clutch at the time of initial assembly, and the direction of rotation cannot be changed thereafter.
For this reason, it is necessary to assemble the motor with a clutch so that its rotational direction matches the rotational direction designated by the device.

The second problem is that since the one-way clutch is attached to the shaft of the reducer, the transmitted torque increases, and it is necessary to install a clutch that can withstand the large torque, which increases the volume of the reducer and makes it expensive.

The third problem is that since the one-way clutch is installed inside the reducer, it cannot be refueled after assembly, resulting in a shortened lifespan.

The object of the present invention is to provide a motor with a one-way clutch that solves the problems of the prior art as described above.

The motor with a one-way clutch of the present invention has a one-way clutch attached to the shaft on the anti-load side of a double-shaft motor with a rotor shaft protruding from both the front and rear ends of the housing, and when the motor is stopped, the rotor shaft on the load side The present invention is characterized in that the motor is prevented from rotating in the reverse direction due to reverse rotation torque.

According to the motor with a one-way clutch of the present invention, by making it easy to attach and detach the one-way clutch, it is possible to easily change the direction of rotation that should be restricted, and it is easy to lubricate the one-way clutch section, resulting in long-life operation. This is an advantage.

Embodiments of the present invention will be described below with reference to the drawings.

In this invention, as shown in Fig. 3, the rotor shaft 2
project from both the load side end bracket 1-1 and the anti-load side end bracket 1-2 of the motor 1, and attach the one-way clutch 8 shown in Fig. 2 to the shaft portion 2-1 protruding toward the anti-load side. .

That is, the end bracket 1 on the opposite load side of the motor 1
The outer ring of the one-way clutch 8 is press-fitted into the hollow part of the clutch housing 4 which is abutted and fixed to the clutch housing 4, and the clutch 8 is fitted onto the rotor shaft portion 2-1 on the anti-load side. Using the pilot part 4-1 or 4-2 provided on the end face as a guide for alignment, the clutch housing 4 is brought into contact with the end bracket 1-2 on the opposite load side of the motor 1, and fixed to the end bracket 1-2 with the screw 9. . A cover 10 is fitted into the hole at the end of the clutch housing 4 to close it and prevent dust from entering.

Since the motor with a one-way clutch according to the present invention has the above-described configuration, the rotation of the rotor shaft of the motor is limited to one direction by the action of the one-way clutch 8, and when the motor stops, the rotation of the rotor shaft of the motor is limited to one direction by the action of the one-way clutch 8, and when the motor is stopped, the rotation of the rotor shaft of the motor is limited to one direction by the action of the one-way clutch 8. Since the rotational force is blocked, by using it in some types of hoisting devices, it is possible to prevent the load from falling when the motor stops, and when changing the direction of rotation that should be restricted, the clutch 8 can be installed. The direction of rotation can be changed by a simple operation of removing the clutch housing 4 from the end bracket 1-2 and fixing the opposite end of the clutch housing 4 with the mounting screw 9 so that it is in contact with the end bracket 1-2 of the motor. This has the advantage that the direction of rotation can be easily changed even after the motor is attached to the hoisting device.

Further, since the shaft to which the one-way clutch 8 is attached is the rotor shaft 2 of the motor, the transmitted torque is minimal, and the one-way clutch to be attached can be manufactured at low cost because it only needs to have a small capacity.

Furthermore, since it is easy to remove the dustproof lid 0 attached to the center of the clutch housing 4 and replenish the one-way clutch, the life of the clutch can be maintained for a long time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of a conventional motor, FIG. 2 is a sectional view of the main parts of a one-way clutch, and FIG. 3 is a partially sectional front view of the motor of the present invention. 1... Motor, 1-1, 1-2... End bracket, 2... Rotor shaft, 2-1... Shaft portion, 3
...Case, 4...Clutch housing, 4-
1, 4-2... Pilot section, 5... Output shaft, 6...
... Rear bearing plate, 7 ... Output shaft gear, 8 ... One-way clutch, 8-1 ... Outer ring, 8-2 ... Inner surface, 8-3 ... Roller, 8-4 ... Spring,
8-5...retainer, 9...screw, 10...lid.

Claims (1)

[Claims for Utility Model Registration] (1) A rotor shaft of the motor is made to protrude from both the front and rear ends of the housing, and a clutch housing is attached to the shaft portion of the rotor shaft on the anti-load side via a one-way clutch. A motor with a one-way clutch, characterized in that a mounting surface for an end bracket of the motor is formed on both sides of the motor, and any side surface of the clutch housing can be detachably attached to the end bracket. (2) The one-way clutch according to claim 1, wherein the one-way clutch is press-fitted into the clutch housing, and the open end of the press-fit hole is covered with a detachable dust-proof lid. motor.