JPH0642541A - Rotation transmitting device - Google Patents

Abstract

PURPOSE:To enable fitting with a slight force by forming crest parts on end faces of a driving shaft and a driven shaft, by energizing one of the shafts with a spring to a rotating element to an intermediate position, by generating rotating force on the other shaft through contact with the crest part and by guiding it to a fitting position. CONSTITUTION:In engaging a driving shaft 2 with a driven shaft 3, when the phase of a shaft part 6 of the driving shaft 2 does not accord with a hole 5 of the driven shaft 3, crest parts 7 and 8 of the both shafts are faced to each other at slopes and a rotating force in the clockwise direction, for example, is generated at the driving shaft 2. At this time, the driving shaft 2 is brought into contact with a spring end 19 at a projection 21 and rotated in the clockwise direction against the elastic force of a spring 9. As rotation zone from the middle of the driving shaft 2 is set longer than the slope on one side of the crest part of the driven shaft 3, if the driving shaft 2 is rotated in the rotation zone, the hole 5 is engaged with the shaft part 5 in the middle so that the rotating force can be transmitted. When a rotating element 4 is rotated, the rotation is transmitted to the driving shaft 2 through contact between a stopper 17 and a stopper receiver 18 and to the driven shaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a device for transmitting rotation by fitting a drive shaft and a driven shaft in the axial direction.

[0002]

2. Description of the Related Art When a drive shaft or a driven shaft is removably installed in an object to be installed, a meshing clutch or a spline type shaft coupling is used as a rotational force transmitting means between the shafts. Is used. When the meshing rotation phases of these clutches and shaft couplings do not match, it is necessary to fit them while rotating either shaft. However, when the rotation adjustment cannot be performed with a light force, the phase adjustment is necessary due to their fitting, and the engagement cannot be easily achieved.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to enable the two shafts to be connected to be fitted with each other with a light force even when the fitting phases are out of phase.

[0004]

According to the present invention, when the drive shaft and the driven shaft are fitted with each other by the hole and the shaft portion, a mountain portion is formed on the end surface of the shaft, and one of the two is formed. By urging the shaft so that it comes to the neutral position by the spring with respect to the rotating body, in the fitting process of the two shafts, a rotational force is generated in the other shaft by the contact of the two crests, and the two shafts are fitted together. The position is automatically guided.

[0005]

1 to 4 show a rotation transmission device 1 according to the present invention.
Is shown. The rotation transmission device 1 is assembled by a drive shaft 2, a driven shaft 3 and a rotating body 4. The drive shaft 2 has a cruciform shaft portion 6 having a convex portion in the radial direction that fits into the hole 5, and all the convex portions or only one convex portion has a top edge in the radial direction. The mountain portion 8 is formed.
Further, the driven shaft 3 is formed with an axial hole 5 whose cross section changes in the radial direction, for example, as a cross shape, and has a mountain portion 7 whose top side changes in the radial direction in the thick portion at the tip thereof. Is forming.

The drive shaft 2 has a central hole 1 of the rotating body 4.
2 and is rotatably supported by a pair of bearings 11. The drive shaft 3 and the rotating body 4 form a waterproof maze by means of the annular groove 14 and the annular protrusion 16 fitted therein. The rotating body 4 forms an output gear 22 at the outer peripheral portion thereof, and takes in a rotational force from a drive source (not shown).

Further, the drive shaft 2 is regulated inside the rotating body 4 by a rotation range regulating means 10 so that it can rotate only within a certain rotation range. That is, the stopper 17 provided in the diametrical direction of the drive shaft 2 hits the stopper receiver 18 provided on the rotating body 4, so that the drive shaft 2 rotates by a predetermined angle α (90 degrees) with respect to the rotating body 4. You can do it.

The drive shaft 2 is held by the spring 9 in the regulated rotation range at an intermediate position, that is, at an angle α / 2. That is, the spring 9 is the annular protrusion 1 of the rotating body 4.
6 is incorporated as a torsion coil spring in the outer peripheral portion of the spring 6, and projections 21 formed integrally with the drive shaft 2 are sandwiched between spring ends 19 at both ends, and both sides of a spring bearing 20 integrated with the rotating body 4 are provided. Abutting. Here, the drive shaft 2
The rotation range (α / 2) from the middle of is set longer than the slope on one side of the mountain portion 7 of the driven shaft 3.

After the driven shaft 3 is disengaged from the drive shaft 2, when the driven shaft 3 is reengaged with the driven shaft 3, and the holes 5 and the shaft portion 6 are in phase with each other, they are fitted with each other as they are. But,
When the phase of the shaft portion 6 of the drive shaft 2 does not match the phase of the hole 5 of the driven shaft 3, the peak portions 7 and 8 of the both face each other on the slope, so that the drive shaft 2 can be moved in either direction, for example, as shown in FIG. As shown, a clockwise rotational force is generated. At this time, the drive shaft 2 is
The protrusion 21 hits one spring end 19 and
It rotates clockwise against the elasticity of. As described above, the rotation range from the middle of the drive shaft 2 is set longer than the one side slope of the mountain portion provided on the driven shaft 3. Therefore, while the drive shaft 2 is rotating in the rotation range, the hole 5 and the shaft portion 6 are fitted to each other, and the rotational force can be transmitted.
In this state, when the rotating body 4 rotates by receiving a rotational force from an external drive source, the rotation is transmitted to the drive shaft 2 by the contact between the rotation range regulating means 10, that is, the stopper 17 and the stopper receiver 18. It is transmitted to the driven shaft 3 via the hole 5 and the shaft portion 6 in the fitted state.

[0010]

Other Embodiments In the above embodiment, the shaft portion 6 is provided on the drive shaft 2.
Although the hole 5 is formed in the driven shaft 3 and the hole 5 is formed in the driven shaft 3, the positions of the hole 5 and the shaft portion 6 may be opposite to those in the embodiment. Further, in the above embodiment, the hole 5 and the shaft portion 6 are provided.
The cross section has a cross shape and is formed by four convex portions. However, the number of these convex portions may be two or more. Therefore, the rotation range restricting means 10 rotates depending on the number of these convex portions. The range will change.

[0011]

According to the present invention, even if the fitting phases of the holes of the two shafts and the shaft portion do not match, one shaft rotates due to the abutting relationship with the mountain portion of each shaft during the fitting process. Then, since they are guided to the fitting position, the fitting adjustment of the two becomes easy, and even in this case, since the rotating body does not rotate in the adjusting direction, the driving system is not adversely affected.

[Brief description of drawings]

FIG. 1 is an axial cross-sectional view of a rotation transmission device.

FIG. 2 is a front view of the rotation transmission device in an intermediate position.

FIG. 3 is a front view of a state in which a drive shaft is rotated with respect to a rotating body within a predetermined range.

FIG. 4 is a front view of a driven shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotation transmission device 2 Drive shaft 3 Driven shaft 4 Rotating body 5 Hole 6 Shaft part 7 Crest part 8 Crest part 9 Spring 10 Rotation range regulating means 17 Stopper 18 Stopper bearing 20 Spring bearing 21 Protrusion

Claims (2)

[Claims] 1. A device for transmitting rotation by axially fitting a drive shaft and a driven shaft, wherein one shaft is provided with an axial hole whose cross-section changes in a radial direction, and the other shaft is provided with the hole. Providing a shaft part with a radial convex part that fits with, the top side forms a radial crest part on the thick part of the tip of one shaft, and the top side radial crest part on the tip of the convex part of the other shaft. And one of the shafts is rotatably supported concentrically with the rotating body, and a rotation range restricting means is provided between the rotating body and the shaft rotatably supported by the rotating body. A rotation transmission device characterized in that a shaft provided between the shaft and the shaft is positioned in the middle of a rotation range, and a rotation range from the middle of the shaft is longer than that of one side slope of a mountain portion provided on the one shaft. 2. The rotation transmission device according to claim 1, wherein the mountain portion of the other shaft is provided so as to project in the axial direction of only one convex portion.