JPS6322340Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a one-way clutch that outputs or does not output rotational output depending on the rotational direction of rotational input.

In Utility Application No. 57-172861, the present applicant proposed an internal toothed ring having internal teeth on the inner periphery of a cylinder wall, a disk fitted to the internal toothed ring so as to be rotatable relative to the inner periphery, and a disk pivotally mounted on the disk. When the internal gear rotates in one direction, it meshes with the internal teeth and rotates the disc together with the internal gear, thereby rotating the shaft fixed to the disc, and when rotating in the other direction, it starts the shaft. We proposed a one-way clutch that disengages from the internal teeth and allows only the internal tooth ring to rotate freely.

This has certain effects, such as eliminating the clicking and clicking sounds that occur when the internal gear wheel idles in the conventional system where the ratchet pawl is pulled by a spring and constantly meshes with the ratchet internal teeth of the internal gear ring. The problem is that the structure is somewhat complex and many parts are used.

Therefore, the present invention has the advantages of the above-mentioned prior art, but simplifies the structure and facilitates assembly, and is of a type in which the internal toothed ring idles when the rotational input applied to the internal toothed ring is clockwise. It was developed using the principle of planetary gears with the aim of producing two types: one in which the internal gear spins idly when the clutch is turned counterclockwise, and a one-way clutch with high productivity can be obtained. . Hereinafter, the present invention will be explained with reference to an illustrated embodiment.

Reference numeral 1 indicates a fixed plate, and reference numeral 2 indicates a hollow gear ring having internal teeth 4 on the inner periphery of the cylinder wall 3 and receiving rotational input with teeth 5 on the outer periphery of the cylinder wall. A plurality of snap claws 6 stand up on one side of the fixed platen at positions surrounding the outer periphery of the cylindrical wall, and when the cylindrical wall is pushed into the interior surrounded by the claws 6, when the end face of the cylindrical wall comes into contact with the fixed platen surface, The snap pawl locks the shoulder protruding from the outer peripheral tip of the cylinder wall, and holds the hollow tooth ring rotatably.

An auxiliary plate 7 is housed inside the cylindrical wall so as to be relatively rotatable, and a guide path 8 consisting of an arcuate hole or an arcuate groove concentric with the internal teeth is provided in this, and the shaft of the planetary gear 9 that is constantly meshed with the internal teeth is provided on this plate. 9' is placed in the guideway so that the planet gear can move inside the cylinder wall along the free guideway. Reference numeral 10 denotes a penetrating shaft rotatably held in a circular hole 1' of the fixed plate, and an output gear 11 that does not mesh with the internal teeth is fitted to the end of this shaft protruding into the cylinder wall. It is located in a position where there is no The shapes of the internal teeth, the planetary gear, and the output gear are the same, and when the planetary gear is located at one end 8b of the guideway near the output gear, it meshes with the teeth of the output gear as well as the internal teeth, but from this position As it moves toward the other end 8a, it gradually separates from the output gear, and when it is at the other end 8a, it only meshes with the internal teeth and comes off from the output gear.

Therefore, as shown in FIG. 4, when the planetary gear is located at the end 8a of the guideway and the hollow gear receives rotational input and rotates in the clockwise direction of arrow a, the planetary gear remains at that position. and idle in the same direction as the internal teeth,
The clutch becomes disconnected and does not transmit rotation to the output gear. However, when the hollow gear rotates in the counterclockwise direction of arrow b in this state, the planetary gear revolves while rotating in the same direction as the hollow gear, moves toward the end 8b in the guideway, and becomes the output gear. They gradually approach each other and finally engage, rotating the output gear clockwise and bringing the clutch into contact. In this state, when the rotation of the hollow gear changes clockwise, the planetary gear revolves and moves to the end 8a in the guideway, and the clutch becomes disengaged again.

Thus, according to the present invention, a one-way clutch can be provided which has a simple structure using a very small number of parts and which can be put into a disengaged state in which the output shaft does not rotate, or into a clutch engaged state in which the output shaft rotates, depending on the direction of rotation of the internal gear wheel.

The auxiliary plate is provided with a central shaft 7a that protrudes into the center hole at the bottom of the cylinder wall, and the output gear is provided with a protrusion 1.
1' is protruded and inserted into the eccentric hole 7' of the auxiliary plate, thereby positioning the auxiliary plate in the cylinder wall and preventing it from rotating.

In this embodiment, a damper housing 12 is attached to the other side of the stationary plate concentrically with the through shaft, and a damper plate 13 that can rotate in the housing is provided at the end of the through shaft that protrudes into the housing. Use a highly viscous oil such as silicone oil 1
4 is filled. If necessary, in order to enhance the control effect, the brake plate may be provided with a hole 13' in the plate surface or a notch such as a tooth shape in the edge. As a result, when the output gear rotates due to rotational input transmitted through meshing with the planetary gear, the brake plate, which is integrally connected to the output gear through the through shaft, must rotate in oil, so rotational input is transmitted to the hollow gear. The applied rotational input is braked.

Therefore, a fixed plate or housing 12 is installed on the lid side of a video tape recorder or automobile dashboard.
The arms 15 extending outward are fixed, and the teeth on the outer periphery of the hollow gear are engaged with the sector gear provided on the main body side of the recorder or car body, or the arm 15 is fixed on the main body side, and The teeth on the outer periphery mesh with the sector gear on the lid side, and when the lid is open, the hollow gear and planetary gear rotate freely, allowing the lid to be easily closed by hand. It is possible to release the lock by operating a push button, etc., and dampen or dampen the sudden opening of the lid due to spring force. In this case, in order to prevent oil from leaking from the housing between the through shaft and the circular hole, a packing 16 is fitted and sealed at the part of the through shaft that protrudes into the housing, and the peripheral edge of the packing is fixed to a fixed platen. It is best to sandwich it between the housing and the housing.

As shown in the figure, there are two symmetrical guideways, so one chooses the one in which the shaft of the planetary gear is inserted, and the one in which the rotational input is braked by the clockwise rotation of the hollow gear, and the other in which the rotational input is braked by the clockwise rotation of the hollow gear. Two types can be manufactured: one in which the rotational input is braked by rotation in the direction.

Furthermore, the guideway can also be formed on the surface of the fixed plate as shown by the broken line in Figure 3. By doing so, the auxiliary plate can be omitted, and if omitted, the overall thickness will be reduced. It can be made thinner and more compact.

Furthermore, when two symmetrically provided taxiways are connected through a communication passage 17 having the same curvature as the taxiway as shown by the broken line in FIG. 4, the planetary gear is located at the end 8b of one taxiway 8-. At this time, when the hollow gear rotates clockwise (arrow a), the planetary gear moves toward the end 8a in the guideway 8- and is temporarily separated from the output gear, but the end 8a of both guideways moves toward the end 8a. are in communication through the connecting path 17, so the planetary gear passes through the connecting path and reaches the end 8b of the other guiding path 8-, where it meshes with the output gear from the opposite side and reverses the output gear. In other words, when the planetary gear is moving from the end 8b of the taxiway 8- to the other taxiway 8-, the output gear has stopped rotating, but when the planetary gear is moving from the end 8b of the taxiway 8- The output gear can also be provided with a clutch that automatically starts reversing when it comes.

Although the material of each part can be selected arbitrarily, a significant weight reduction can be achieved by making all parts molded from plastic.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an overall perspective view, Fig. 2 is a vertical side view, Fig. 3 is an exploded perspective view, and Fig. 4 is an operational explanatory view. Inside, 1 is a fixed plate, 2 is a hollow gear, 3 is a cylinder wall, 4 is an internal tooth, 9 is a planetary gear, 10 is a shaft, and 11 is an output gear.

Claims (1)

[Claims for Utility Model Registration] (1) A hollow toothed ring 2 having internal teeth 4 on the inner periphery of a cylindrical wall 3 and external teeth 5 for receiving rotational input on the outer periphery is rotatably held on one side of a fixed platen 1. In addition, two arcuate guide paths 8, 8 are symmetrically provided inside the hollow gear 2, which is concentric with the rotation axis of the hollow gear.
A planetary gear 9 that constantly meshes with the internal teeth 4 on the inner periphery of the cylinder wall.
A shaft 9' is movably supported in either one of the two arcuate guideways, and the fixed platen 1 has a through shaft 10 intermediate between one end of each of the two arcuate guideways 8, 8. The penetrating shaft 1 is held rotatably.
The portion of the hollow gear 2 that protrudes into the interior of the hollow gear 2 is not engaged with the internal teeth 4 at all times, but when the planetary gear 9 moves to one end of each of the guide paths 8, 8. A one-way clutch characterized by being provided with an output gear 11 that meshes with the clutch. (2) The one-way clutch according to claim 1, wherein the two arcuate guideways 8, 8 are provided on one side of the fixed platen 1. (3) The one-way clutch according to claim 1, wherein the two arcuate guideways 8, 8 are provided on an auxiliary plate 7 fixed concentrically inside the hollow toothed ring 2. (4) The utility model according to any one of claims 1 to 3, in which each end of the two arcuate taxiways 8, 8 is connected by a connecting path 17 having the same curvature as the taxiway. One-way clutch.