JPS604663A - Reduction gear - Google Patents

Abstract

PURPOSE:To reduce size while to achieve high reduction ratio and high transmission power, by making sinusoidal grooves in one face of first and third discs and in both faces of second disc while providing rolling members between the first and second and the second and third discs. CONSTITUTION:Sinusoidal grooves 8, 9, 10, 11 are made in both faces of second disc 2 and one face of first and third discs 1, 3 while rolling members 12, 14 are placed between the discs 1, 2 and 2, 3. Since all rolling members 12, 14 will perform power transmission, the size can be reduced. While since the reduction ratio is determined by the number of ridges of sinusoidal grooves, high reduction ratio is achieved to enable high power transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a reduction gear, and particularly to a reduction gear that can obtain a large reduction ratio while reducing the overall size.

[Prior art and its problems]

For example, many devices that use a motor as a power source transmit the rotation of the motor to a load via a reduction gear.

Incidentally, various reduction gears for such uses have been proposed in the past, but the most commonly used one is a combination of small gears and large gears. In other words, it is a gear-type reducer in which the input rotating shaft rotates the small tooth east, and the rotation of the large gear meshed with this small gear is transmitted to the output rotating shaft.However, the gear-type reducer has the following features. There were problems like. That is, now the number of teeth on the small gear is z11 and the number of teeth on the canine gear is Z! , the pitch circle diameter of the small gear is DI, and the pitch circle diameter of the large gear is DI, then the reduction ratio X of this reducer is Z, D.

becomes. Therefore, in order to increase the reduction ratio X, it is necessary to reduce the pitch diameter D2 of the small gear or to increase the pitch diameter D2 of the large gear. However, there is a limit to the minimum number of gear teeth, so in order to set a large reduction ratio It is inevitable that it will become larger. In the case of a gear type speed reducer, power is transmitted through the teeth of a small gear and a large gear, and one or two teeth that are in contact with each other. Therefore, in order to transmit the necessary power, it is necessary to provide one large tooth for each tooth that can withstand the transmission of that force. Therefore, from this point of view as well, if one attempts to set the reduction ratio X to a large value, there is a problem in that the overall size cannot be avoided.

[Purpose of the invention]

The present invention has been made in consideration of these circumstances, and its purpose is to provide a reduction gear that is small, can transmit power with high efficiency, and can also provide a large reduction ratio. It's about doing.

[Outline of the invention]

The first curve is a sinusoidal curve that intersects the reference circle of the plane. f on one side of the third disk, and on both sides of the second disk.
+ifi has been achieved.

11th record ε 141 disk and second disk, and the second disk and funeral 3 disk are facing each other on their respective planes, and the space between the first disk and second disk, and the second disk are A rolling element is interposed between the second disc and the eighth disc, and the first disc is used to hold the rolling element. There is a second retainer.

The first retainer and the third disk are fixed.

Here, when the first disc is rotated using the input shaft, the second disc and the second retainer are rotated in the opposite direction to that of the first disc. The second holder is then taken out as an output.

〔Effect of the invention〕

Since all rolling elements transmit power, a small reduction gear is possible.Also, the reduction ratio is determined by the number of sine wave grooves provided in the disk, so a large reduction ratio is possible. As a result, the present invention provides a small size, large deceleration, and high transmission power.

[Embodiments of the invention]

FIG. 1 shows two embodiments of the present invention.

The planes of the first, second and third discs 1.2.8 4,5°6.
7 (second grooves 8, 9, 10, and 11 each have a sinusoidal wave shape, and the planes 4 and 5 face each other with a rolling element 12 in between. The rolling element 12 is held by a first retainer 13). ing.

Further, the plane 6 and the plane 7 also face each other with the rolling element 4 interposed therebetween, and the rolling element 14 is held by a retainer 15.

The disc 1 of H is rotatably mounted on the housing 17 by means of a bearing 16. The second disk 2 is rotatably supported by the second retainer 15 through a bearing 18 (f).
The circle &3 of jlSd is fixed to the housing '17. Further, the first retainer 18 is fixed to the housing 17, and the second retainer 15 is rotatably supported by the third disk 8 by a bearing 19.

εI'Jl - 8th disk 1.2. Plane of a4. b,
6. On the top of
2 is I'i''#.

The shapes of the first and second retainers 18.15 are shown in FIG.

81 is the maintenance vessel, and the elongated hole 32 must be opened.

qS 1 l) J, the disk l is the input side and the second holder 15 is the output jiill. Further, the rolling elements are located at the intersections of ft't 8 and 9, and ft't 1o and 11 of the sinusoidal shape.

Next, the principle of this embodiment will be explained with reference to FIG. The sinusoidal grooves 8.9.10.111/) f-p core wires are SIN curves 41.42 and 48.44. And SIN curve 4
If the intersection of SIN curves 1 and 42 is A, and the intersection of SIN curves 43 and 44 is B, rolling elements 12 and 14 are present at intersections A and H.

Here, if the rolling element at the intersection A is fixed and can be moved vertically in the figure), and when the SIN curve 41 is rotated counterclockwise by θ1 and the SIN curve 42 is rotated clockwise by θ22, the following equation holds true.

CφS 7iyθF=Cφ8Z2-02 (1) C and TeZ
,,Z2 is SIN,l! ? - The number of peaks of blocks 41 and 42.

Also, S [N car, turn 1 of bu 42 is the corner and SIN curve 4
The rotation angles of 3 are the same value, and the sTN car 44 is fixed, so when the SIN curve 42 rotates by θ22, the rotation angle of the intersection B is θ, and the angles of the SIN curves 48 and 44 are respectively ZRr Z4 Then, the following equation holds true.

Cφ8z3(θ, -〇>=CφSZ4'θ (2) Here, if the reduction ratio is set to X, the reduction ratio is expressed by the following formula.

θ1 X=--(3) 1-If we rearrange the three equations, becomes.

Ri+! : , jt HaZ, == , l , Z2""
10, Z3==1, Z,;=10, the reduction ratio becomes 110~ As explained above, the present invention allows the reduction ratio to be freely selected by the sinusoidal waveform. Since all the rolling elements in the photograph transmit power, this selection is of the 'j-type, large reduction ratio,
A reduction gear with large transmission power can be provided.

[Brief explanation of drawings]

ε (Figure 51 is a longitudinal cross-sectional view of the main button, Figure 2 is a front view showing the sinusoidal (?4) formed on the plane of the disc of the present button, Figure 3 is a front view of the cage of the present invention Front view 44., Figure 4 is Kizu.
1 is a diagram of the principle of light. 1, 2. a... Disc, 4.5.6.7... Plane,
8, 9.10.11...sinusoidal groove, 12.14.
...Rolling element, 18.15...Cage, 16.18.1
9...housing (4 units, 17...housing, 21...
Disc, 22...Sinusoidal groove, 31...Cage:
32...Slot hole, 41.42.48°44...SIN
curve. Agent Patent Attorney Rule Yu Chikaten (and 1 other person) No. 1
Figure 4 (cL)

Claims (1)

[Claims] Mulberry tree with curved grooves that intersect the reference circle of the plane at a constant pitch 41. Second. The 8th disk and O1■ M'S
At the same time, the first disc and the second disc are opposed to each other via rolling elements held by an fAl cage, and at the same time, the second disc of rnl.
The disc rotates with the eighth disc in ML on the opposite side from the first disc in MU via a rolling element held by a second cage,
A speed reducer patented in that the first retainer and the eighth disc are fixed.