JPS6053267A - Device for transmitting motive power - Google Patents

Abstract

PURPOSE:To make a motive power transmission device compact, simplify its construction, and enable the driving of the device in both directions of rotation, by enabling the axial sliding of one of shafts coupled to a conical wheel, a rolling ring and a retaining disk. CONSTITUTION:A conical wheel 2 is coupled to an input shaft 1. A retaining disk 10 is coupled to an output shaft 9. A rolling ring 7 is coupled to a housing 9. The retaining disk 10 is pushed on a ball 8 by an elastic member 18. The output shaft 9 coupled to the retaining disk 8 can be moved in the axial direction. As a result, the number of parts of a motive power transmission device is reduced, the device is made compact, its construction is simplified, and the device can be driven in both directions of rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Substances of the Invention] The present invention relates to a power transmission device having bidirectional drive shifting and axial movement functions.

[Summary of the invention]

The present invention utilizes planetary motion by eight-point contact of steel balls in order to provide the above-mentioned functions.

[Funny example of invention]

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

In the figure, (1) is an input shaft that is connected to a drive source and rotates, (2) is a conical wheel provided at the end of this human power shaft (1), and 13) is a bearing (4), (5). A first bracket that supports the human power shaft (1) through the housing, (6) is a housing fixed to the end face of this bracket], (7) is a rolling wheel (hereinafter referred to as fixed) fixed to the housing (6). plate) and is arranged concentrically with the conical wheel (2). (8) is a steel ball that is pressed against the conical wheel (2) and the fixed plate (γ), and (9) is the output shaft, with a spline part (9a) in the center.
has. OG is a holding disk (
(hereinafter referred to as carrier), (1,0a3 G) is a four-part groove provided on the side surface of the housing and has an inclination angle with respect to the circumferential direction and contacts the above-mentioned ball (8). Oη is the housing ( 6) a second bracket fixed to the other end;
08 is an auxiliary shaft that is spline-coupled with the output shaft (9), and is rotatably and axially movable with a bracket αυ via a bearing a:4a<, a space collar 0!9, and a retaining ring 08 (171). The θ frame is a leaf spring that presses the carrier αq toward the input shaft (1), and (18a) is a stopper portion.

Figure 2 is a side view of the carrier 00 seen from the input shaft side. Figure 8 is a sectional view taken along the line ■-■ in Figure 2, and the four-part groove (LOA) provided in the carrier 0q is circumferentially It has an inclination angle θ in the direction, and its depth is l.

(+ to 10) is the isosurface line of the four-part groove a0.

Next, the contact of the steel ball (8) will be explained with reference to FIG.

In Fig. 4, the center 0 of the steel ball (8) is the origin, the axial direction of the rotating shaft (1) is the X axis, the radial direction is also the 2 axis, and the pressure contact point of the conical wheel (2) and the steel ball (8). A, the press contact point between the four-part groove (10a) of the carrier αQ and the steel ball (8), B, the fixing plate (7)
) and the steel ball (8).The pressing force at each pressure contact point A, B, and 0 is NA, NB, and Nc. Further, pressure contact point B has an angle θ with respect to the X axis, and the OB line is set as the η axis.

In other words, pressure contact points A and O between the steel ball (8), conical wheel (2), and fixed plate (7) are on the X-2 plane, and pressure contact point B with the carrier 01 is at an angle with respect to the X-Z plane. It is located on the η-2 plane tilted by θ, and the pressure contact point A is
, E, and O are wedge-shaped in the circumferential direction. However, even though the steel ball (8) is wedged in the circumferential direction, it is free to rotate about the η-axis, and it becomes a planetary motion that revolves and rotates on its own axis due to the rotational force of the conical wheel (2). Transferred on the conical surface of the fixed plate (7), carrier 0
0 will be slowed down.

This speed reduction ratio is as follows, and by changing the positions of pressure contact points A, B, and 0, a wide range of speed change ratios can be obtained.

However, NIN is the IgJ rotation number N0UT of the conical wheel (2), the rotation number R1 of the carrier OQ is the radius R2 from the rotation axis (1) to point A, and the rotation axis (
1) The radius rl from the 0 point is the radius r2 from the η axis of the steel ball (8) to the point A. The operation will be explained using the radius method from the η axis of the steel ball (8) to the 0 point. When power is not being transmitted to the input shaft (1) from the drive source (not shown), the second
As shown in the figure, the carrier (
8) is pressed against the input shaft (tJ (Ill),
The steel ball (8) is in contact with the four-part groove (10a) at its deepest point.

When power is transmitted from the drive source to the input shaft (1), rotational force is transmitted, and the pressing force of each contact point A, B, 0 changes.

The axial thrust of the contact point B due to the rotational force overcomes the elastic force of the leaf spring 0 frame, and moves the carrier 01 and the output shaft (9) fixed thereto to the side opposite to the input shaft. In this case the fifth
As shown in the figure, the carrier aQ comes into contact with the stopper part (18a), and the steel ball (8) moves along the slope of the four-part groove (10a). At this time, since the depth l of the four-part groove (10a) is deeper than the moving distance l' of the output shaft (9), the steel ball (8) does not come off the four-part groove (10a). At the same time, the power of the drive source is transmitted with torque through contacts A, E, and 0 that are pressed into contact with the steel ball (8) mentioned above, and is decelerated by the planetary motion of the steel ball (8) and transferred to the output shaft (9). Power can be transmitted. Since the TGT rotation direction of the drive source is pressed at an inclination angle θ in both left and right rotations, movement and torque transmission of the output shaft (9) in plane rotation are possible.

The force acting on the steel ball (8) is a balance of forces at eight points, and the pressing according to the rotational force is a force, and the minimum pressing necessary for friction transmission is the generation of force. The gear ratio can be arbitrarily selected by simply changing the positions of the eight contact points, resulting in a wide range of gear ratios. Note that even if the input and output shafts are reversed, the gear ratio will simply be a reciprocal, but by making the input shaft movable in the axial direction by spline connection or the like, the same operation and function can be achieved.

In the above embodiment, the fixed plate is fixed to the housing, but this is used as the rotating shaft, and either the carrier or the conical wheel is used. r
: Even if it is fixed, it can have the same function. Furthermore, all of the conical wheel, fixed plate, and carrier are set as N rotation axis,
It is also possible to obtain a device with two human-powered shafts and one output shaft, or a device with one human-powered shaft and two output shafts.

〔Effect of the invention〕

As described above, according to the present invention, the steel ball, the conical wheel, the fixed plate,
The number of parts is reduced due to the carrier having a four-part groove with inclination angles in both rotational directions, and the mechanism in which the plate blade, the conical wheel, the fixed plate, or the shaft connected to the carrier can be slid in the axial direction. The present invention provides an excellent power transmission device that is small, simple, inexpensive, and has the functions of a transmission device capable of driving in both rotational directions and axial movement.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a side view of the carrier, Fig. 8 is a sectional view taken along the line 21A, and Fig. 4 is an explanatory diagram of the operation of the invention. , FIG. 5 is a T-sectional view showing one operation mode of the device shown in FIG. 1. In the figure, (1) is the input shaft, (2) is the conical wheel, and (3)
aυ is the bracket, (6) is the housing, (7) is the fixed plate, (8) is the steel ball, (9) is the output shaft, (9a) is the spline part, Oq is the carrier, (10a) is the four-part groove, [ phase]
is a board. Agent Masuo Oiwa Figure 4 7 Figure 5

Claims (4)

[Claims] (1) A conical wheel connected to the first rotating shaft, a rolling wheel arranged concentrically with the conical wheel and having a conical surface on its inner periphery, a second rotating shaft connected to the transmission wheel, and the conical wheel and a sphere that comes into contact with the conical surface of the rolling wheel, a holding disk having a side surface that comes into contact with the ball at a predetermined angle of inclination with respect to both rotational directions, and an eighth rotating shaft connected to the holding disk. A power transmission device, characterized in that any one of the first to eighth rotating shafts is movable in the axial direction, and is pressed against the one of the spheres by an elastic body. (2) The power transmission device according to claim 1, characterized in that any one of the first to eighth Ir+1 rotating shafts is fixed. (3) The power transmission device according to claim 1 or 2, characterized in that at least one of the conical wheel, the rolling wheel, and the holding disc is made of a material having durability. (4) The power transmission device according to claim 1, wherein the inclination angle is in the range of 2° to 16°.