JPS6233143Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotation transmission switching device that switches the connection between a rotary body and a plurality of other rotary bodies by moving the rotary body rotatable around a shaft on the axis. be.

Conventionally, this type of device applies an axial bias force to a rotating body that moves on an axis, supports the pivot by providing a pivot receiving part, and moves the rotating body in the axial direction by moving the pivot receiving part in the axial direction. I was on the move. However, this method is difficult due to the shape of the pivot receiver.
It is difficult to increase the length of the bearing part of the rotating body, which has the disadvantage of increasing the radial wobbling of the rotating body, and the height of the equipment increases to ensure that the bearing part does not wobble. Moreover, because the pivot receiving portion is also provided at the end in the axial direction, it is not suitable for reducing the height of the device.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and provide a rotation transmission switching device that can be made thin, has a reliable switching function, and is easy to assemble.

The present invention provides a mechanism that can be connected to other rotating bodies at the upper and lower parts of the rotating body, and the middle part has a cylindrical shape smaller in diameter than the upper and lower parts. A C-shaped ring made of an elastic material is fitted with a predetermined height clearance, and this C-shaped ring is connected to a power arm that moves up and down to move the axial position of the rotating body. This is what I did.

Hereinafter, the present invention will be specifically explained with reference to embodiments illustrated in the drawings. FIGS. 1 and 2 are cross-sectional views of an embodiment of the present invention, showing each switching state. FIG. 3 shows an external perspective view of the components of the switching device of the present invention shown in FIGS. 1 and 2. FIG.

In the figure, 1 is a fixed frame, and 2 is a shaft fixed to the frame 1. Reference numeral 3 denotes a switching pulley that is rotatable around the shaft 2 and slidable in the axial direction, and has an arm section 3a on its upper part, and this arm section 3a connects to a drive pulley 5 that can freely rotate around the shaft 2. The rotational force of the switching pulley 3 is transmitted to the drive pulley. In addition, the gear 3b is located at the bottom.
As the switching pulley 3 moves upward, the gear 3b meshes with the gear 6, which is another rotating body (the state shown in FIG. 1), and transmits rotational force from the gear 6. As the switching pulley 3 moves downward, the engaging teeth 3c disengage from the gear 6 and further engage with the inner circumferential rib 7a of the belt pulley 7, which is another rotating body (see Fig. 2). state), the rotational force is transmitted from the belt pulley 7.

The middle part of the switching pulley 3 has a cylindrical part 3d having a diameter smaller than that of the upper and lower parts, and this cylindrical part 3d
A C-shaped ring 4 made of an elastic material (for example, plastic) is provided which fits with a predetermined clearance in its inner diameter and axial height. A notch and a protrusion 4 are provided on the side of this C-shaped ring 4.
a and 4b are provided. These protrusions 4a, 4
b is fitted into an oblong hole 8a of the switching arm 8, which is rotatably mounted around the fixing pin 9. The switching arm 8 is rotated about a pin 9 by a solenoid 10 and its plunger 10a, and moves the switching pulley 3 up and down in the axial direction via the C-shaped ring 4. When the switching pulley 3 moves upward (the state shown in FIG. 1), the switching pulley 3 receives the rotational force from the gear 6 with the gear 3b, and transmits this rotational force to the drive pulley 4. Further, when the switching pulley 3 moves downward (the state shown in FIG. 2), the switching pulley 3 receives the rotational force from the belt pulley 7 with the engagement teeth 3c, and transmits this rotational force to the drive pulley 4. The vertical movement of the switching pulley 3 is driven by a solenoid 10.
This is done by the excitation of the motor and the action of a spring (not shown).

As described above, according to the present invention, a mechanism for transmitting rotational force by switching and connecting with other rotating bodies is disposed at the upper and lower parts of the switching pulley in the axial direction. Since the mechanism is arranged, the structure is simple, the switching operation is reliable, and the structure is thin.Furthermore, the attachment utilizing the elasticity of the C-shaped ring facilitates the work.

[Brief explanation of the drawing]

1 and 2 are sectional views showing one embodiment of the present invention in each switching state, and FIG. 3 is an external perspective view of each component constituting the switching device of the present invention. 2...Fixed shaft, 3...Switching pulley, 3a...Arm portion, 3b...Gear, 3c...Engaging tooth, 3d...Small diameter cylindrical portion, 4...C-shaped ring, 4a, 4b...Protrusion Part 5... Drive pulley of another rotating body, 6... Gear of another rotating body.

Claims (1)

[Scope of utility model registration request] It has a cylindrical shape that is rotatable around a fixed shaft and can slide in the axial direction, and has a mechanism on the upper and lower parts that can be connected to other rotating bodies, and the middle part is a cylinder with a smaller diameter than the upper and lower parts. a shaped switching pulley, and a protrusion that fits into the small diameter cylindrical portion of the switching pulley with a predetermined clearance in terms of inner diameter and axial height, and that is connected to a notch on the side and a power arm that moves in the axial direction. 1. A rotation transmission switching device comprising: a C-shaped ring made of an elastic material having a section, and switching connection to another rotating body by vertical movement of the switching pulley.