JPH02125112A - Unidirectional clutch - Google Patents

Abstract

PURPOSE:To simplify the structure of a device by providing a coil spring by which a torque is transmitted from a first toothed wheel to a torque transmission wheel when a motor is driven, with its diameter changeable, whereas the torque is not transmitted to the side of the motor when the motor is driven in reverse, with its diameter unchanged. CONSTITUTION:When a driving toothed wheel 5 is rotated normally by a motor 4, a first toothed wheel 3 is rotated to the left to have a starting edge curving part 14 moved to the left by a pin 10, and a finishing edge curving part 15 is stopped in engagement with a projection 9 of a resistance wheel 2, and as a cylindrical part 12 is abutted on a brake shoe 8 through a brake spring 7, a coil spring 13 is bounced to be attached inside of the cylindrical part 12 of a torque transmission wheel 11 with its diameter enlarged, so as for a torque to be transmitted. When the torque transmission wheel 11 is rotated in reverse, the distance between the starting edge 14 and the finishing edge curving parts 15 is shrunk, and the coil spring 13 is removed from the inside of the cylindrical part 12, for the torque not to be transmitted to the side of the motor 4. In the simplified mechanism as this, a unidirectional clutch can be constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a one-way clutch used, for example, in a locking mechanism of an automobile.

(Prior Art) Some automobile doors are designed to switch between locking and unlocking by turning an actuator (a small motor) in the forward and reverse directions when a switch is turned on and off. The above switching can be performed not only by an actuator but also by manual operation of a key or a sill knob. In such a device, when switching between locking and unlocking by operating a key or a seal knob, even the actuator rotates, making manual operation difficult. Therefore, a one-way clutch is used to prevent the actuator from rotating when switching between locking and unloading by manual operation of a key or a sill knob.

Many clutch mechanisms have already been proposed.

(Problems to be Solved by the Invention) The present invention was made based on the idea of creating a new one-way clutch that does not rely on a known structure, and can be widely used in various fields as a mechanical element. .

(Means for Solving the Problem) Therefore, the present invention provides a gear between the first gear 3 rotated by the motor 4 and the torque transmission wheel 11, the diameter of which changes in size when the motor 4 side is rotated. A one-way clutch configured with a coil spring 13 that transmits torque to the torque transmission wheel 11, but whose diameter does not change when the torque transmission wheel 11 side is rotated and does not transmit torque to the motor 4 side. It is.

(Example) To explain one example of Honshirō with drawings, shaft 1
A resistance wheel 2 is rotatably and loosely fitted on the outer periphery of the resistance wheel 2, a first gear 3 is rotatably and loosely fitted on the outer periphery of the resistance wheel 2, and a drive gear 5 of the motor 4 is engaged with the first gear 3.

A brake shoe 8 is connected to the outer surface of the protrusion 6 of the resistance wheel 2 by a brake spring 7 to provide resistance to rotation.

A projection 9 is formed on a part of the resistance wheel 2 and projects in the radial direction. A bottle 10 facing a protrusion 9 is made to protrude from the first gear 3.

A torque transmission wheel 11 is mounted on the shaft 1,
A cylindrical portion 12 is formed at the outer edge of the torque transmission wheel 11, and the cylindrical portion 12 surrounds the protrusion 9 and the bottle 10.

A coil spring 13 is installed inside the cylindrical portion 12, and the coil spring 13 snaps onto the inner surface of the cylindrical portion 12 when the diameter increases, and separates from the inner surface of the cylindrical portion 12 when the diameter decreases. The starting end bent part 14 is bent inward.
and a terminal bent portion 15 are formed, and both surfaces of the protrusion 9 and the bottle 10 are held between the starting end bent portion 14 and the terminal bent portion 15, respectively.

3 and 4 show a second embodiment of the torque transmission wheel 1.
The diameter of the cylindrical part 1 is made smaller, and the coil spring 13 is made into a cylindrical part! 2, and when the coil spring 13 is contracted, it lands on the cylindrical part 12, and when it is expanded, it is separated from the cylindrical part 12. Therefore, the structure of the protrusion 9 of the protrusion 6 is bifurcated 16, the number of bottles 10 is also two, and the cylindrical part 12 is located inside the protrusion 9.

(effect) Next, we will discuss the effect.

To describe the case where the drive gear 5 is rotated in the forward direction by the motor 4, the first gear 3 rotates to the left, and the bin 10 fixed to the first gear 3 is rotated to the left. Therefore, Bin 10
The starting end bent portion 14 is pushed to the left by the coil spring 13.
The terminal bent part 15 of is hooked on the protrusion 9 of the resistance wheel 2, and the brake shoe 8 is in contact with the cylindrical part 12 by the brake spring 7, and the brake is applied, so the starting end bent part! 4 and the terminal bent portion 15, the diameter of the coil spring 13 is enlarged, and the coil spring 13 hits the inner surface of the cylindrical portion 12 of the torque transmission wheel 11, thereby transmitting torque to the torque transmission wheel 11.

However, when the torque transmission wheel 11 side is rotated, the starting end bending part 14 and the terminal end bending part 15 contract, and the diameter of the coil spring 13 becomes small, so that it comes off from the inner surface of the cylindrical part 12 of the torque transmission wheel 11, and the clutch The torque is not transmitted to the motor 4 side, and the torque transmission wheel 1
Only 1 rotates. That is, although torque can be transmitted from the motor 4 side, torque cannot be transmitted from the torque transmission wheel 11 side.

In the case of FIGS. 3 and 4, the arrangement of the coil spring n is
There is only a difference between the inside and outside of the cylindrical part 12, and the functions are the same.

(Effects) The present invention was made based on the idea of creating a new one-way clutch that does not rely on a known structure, and can be widely used as a mechanical element in various fields.

The present invention provides a first gear 3 rotated by a motor 4.
When the motor 4 side is rotated, its diameter changes in size and transmits torque to the torque transmission wheel 11 between the torque transmission wheel 11 and the torque transmission wheel 11.
Since the structure is a one-way clutch with a coil spring 13 interposed that does not change its diameter and does not transmit torque to the motor 4 side when the side is rotated, it is a simple mechanism.
The above objective can be well achieved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view, and Fig. 2 is a longitudinal front view. FIG. 3 is a longitudinal sectional side view of the second embodiment, and FIG. 4 is a longitudinal sectional front view of the second embodiment. Explanation of symbols 1... Shaft, 2... Resistance wheel, 3... First gear, 4... Motor, 5... Driving gear, 6...
-Protruding part, 7...Brake spring, 8...Brake shoe 9...Protrusion, 10...Bin, 11...Torque transmission wheel lever...Cylindrical part, 13...Coil spring,
14... Starting end bending part, 15... End bending part, 16.
...bifurcated]. Figure 2 Figure 1g4 Figure 3 Figure Procedure Amendment (Salmon)

Claims (1)

[Claims] Between the first gear 3 rotated by the motor 4 and the torque transmission wheel 11, when the motor 4 side is rotated, its diameter changes in size and transmits torque to the torque transmission wheel 11. A one-way clutch with a coil spring 13 interposed whose diameter does not change when the 11 side is rotated and does not transmit torque to the motor 4 side.