JPH04151021A - Universal rotary power joint - Google Patents

Abstract

PURPOSE:To turn smoothly and improve transmission efficiency by providing a slide piece which is provided with parallel sections on both sides rotatably on a pin provided in a first shaft cylinder, and providing a longitudinal groove in which the slide piece fits in an outer cylinder connected to a second shaft. CONSTITUTION:More than two pins 13 are mounted in a first shaft cylinder 11 radially, and a rotatable slide piece 15 is mounted on the pins 13 via a bush 14. A longitudinal groove 16 is provided in an outer cylinder 17 of a second shaft cylinder 12, and the slide piece 15 is fitted in it. The slide piece 15 have parallel sections 18, 19 and can move forward and backward in the longitudinal groove 16. When angle exists in the first and second shafts, the slide piece moves in accordance with the angle. Consequently, it turns smoothly and transmits power efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a universal rotary power joint that transmits rotational power from a drive shaft to a driven wheel.

[Conventional technology]

In automobiles, etc., when transmitting the rotational output of the engine to the rear differential gear device, the power shaft has a certain angle, so a universal joint is used. When connecting bent power shafts in a rotary power joint, the shaft cylinder must move back and forth depending on the rotation angle, so one side of the power shaft is a spline shaft, and one shaft cylinder of the universal rotary power joint is a spline shaft. things were being done.

[Problems to be Solved by the Invention] However, when adopting a universal rotary power joint, machining the end of one power shaft into a spline shaft is difficult.
Apart from mass-produced shafts, small-volume shafts require a lot of effort and are expensive.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a universal rotary power joint that can be installed relatively easily without splining the power shafts to be connected.

[Means for Solving the Problems] The universal rotary power joint according to claim 1, which meets the above object, is a universal rotary power joint that connects opposing rotating shafts, and is a universal rotary power joint that connects opposing rotating shafts. A first shaft cylinder, a second shaft cylinder attached to the other rotating shaft, two or more pins provided radially around the first shaft cylinder, and rotatably attached to each of the pins. The sliding piece has parallel parts on both sides, and an outer cylinder having a longitudinal groove formed inside thereof into which each sliding piece fits, and is connected to the second shaft cylinder. There is.

Further, the universal rotary power joint according to claim 2 is a universal rotary power joint that connects opposing rotary shafts, and includes a first shaft cylinder attached to one rotary shaft and a first shaft cylinder attached to the other rotary shaft. A second shaft cylinder to be mounted, two or more pins provided radially around the first and second shaft cylinders, each of the pins being rotatably mounted and having parallel parts on both sides, and A sliding piece having an arc shape with a predetermined rotation radius on the outside;
Each of the sliding pieces includes an outer cylinder having a vertical groove formed inside thereof into which the sliding piece fits with a small gap.

The universal rotary power joint according to claim 3 is the universal rotary power joint according to claim 2, in which a piece having a spherical surface portion is provided at the opposing inner central portions of the first and second shaft cylinders. Each of the pieces is supported so as to be tiltable and axially movable by a sternum frame that is movable in a direction perpendicular to the central axis of the outer cylinder.

(Function) In the universal rotary power joint according to claim 1, the first
Two or more pins are provided radially around the shaft cylinder, and a sliding piece is rotatably provided on the pin, and the parallel portions provided on both sides of the sliding piece are used to rotate the outside. Since it fits into the vertical groove formed inside the cylinder, if the rotating shafts attached to the first and second shaft cylinders have an angle, the sliding piece will not interfere depending on the rotation angle. As it moves in the vertical groove,
Rotational power can be transmitted with the first and second shaft cylinders fixed to the rotating shaft.

Depending on the rotation angle, the sliding piece rotates relative to the pin, but in this case, since the sliding piece is rotatably attached to the pin, it rotates smoothly and transmits power efficiently.

Next, in the universal rotary power joint according to claim 2, two or more pins are provided radially around the first and second shaft cylinders, and the sliding pieces are rotatable on the pins. The sliding piece is freely provided and is inserted into the vertical groove formed inside the outer cylinder by using the parallel parts provided on both sides of the sliding piece.
Furthermore, the outer side of the sliding piece is arcuate and fits loosely into the vertical groove, so the first and second shaft cylinders can rotate at any angle relative to the outer cylinder. can. Therefore, if the central axes of the first and second barrels are not parallel to each other, if they are eccentric to each other, or if they overlap (
That is, even when there is both parallel movement and eccentricity, smooth rotation is possible.

Furthermore, in the universal rotary power joint according to claim 3, a piece having a spherical portion is further provided at the center portions of the opposing inner sides of the first and second shaft cylinders, and each piece is provided with a spherical surface portion. ,
Since it is supported by the sternum, which is movable perpendicularly to the central axis of the outer cylinder, so as to be tiltable and movable in the axial direction, even when the first and second shaft cylinders intersect at an angle, the outer cylinder remains stable. Since the central axis of is always on the neutral line of the intersection angle, rotational power is always transmitted at a constant speed regardless of the angular displacement of the first and second shaft cylinders.

[Examples] Next, examples embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a half sectional view of a universal rotary power joint according to a first embodiment of the present invention, FIGS. 2 and 3 are partial sectional views of the same, and FIG. FIG. 5 is a front view of the outer cylinder of the universal rotary power joint according to the example, FIG. 6 is a side view of the same, and FIG. 7 is an assembled state of the universal rotary power joint. 8 is a perspective view of parts of a universal rotary power joint according to a third embodiment of the present invention, and FIG. 9 is a side cross section of a universal rotary power joint according to a fourth embodiment of the present invention. 10 is a sectional view of a universal rotary power joint according to a fifth embodiment of the present invention, FIG. 11 is a front view thereof, FIG. 12 is a sectional view taken along the line ABCD in FIG. FIG. 7 is a sectional view of a universal rotary power joint according to a sixth embodiment of the invention.

As shown in FIGS. 1 to 3, the universal rotary power joint 1o according to the first embodiment of the present invention is entirely made of metal (or may be made of hard brass, carbon fiber, etc.). , a first and a second shaft mounted on a rotary power shaft (not shown)
The first shaft cylinder 11, I2, four pins 13 (two transmit power, the remaining two are safety auxiliary pins) attached radially to the first shaft cylinder 11, and a bush on the pin 13. 14
A sliding piece 15 rotatably attached via a needle bearing (or a needle bearing) and a vertical groove 1 into which the sliding piece 15 fits
6 and an outer cylinder 17.

A key groove (not shown) is formed inside the shaft cylinder 11, 12, and is adapted to be attached to a rotating shaft to which power is to be transmitted.A pin 13 is provided at the tip of the shaft cylinder 11. A bush 14 is attached to the pin 13, and a sliding piece 15 is attached to the outside of the bush 14.

This sliding piece 15 has parallel parts 1 on both sides as shown in FIG.
8.19, and can move back and forth within the groove 16 formed in the outer cylinder 17. A cover 20 for preventing removal is screwed to one end of the outer cylinder 17, and a shaft cylinder 12 having a flange portion 21 is screwed to the other end.

Therefore, when this universal rotary power joint 1o is attached to a rotating shaft that transmits rotational power, the power is transmitted from the first shaft cylinder 11 to the pin 13, and is transmitted to the vertical groove 16 of the outer cylinder 17 via the sliding piece 15. and is transmitted to the rotating shaft via the second shaft cylinder 12.

In this case, even if the rotating wheels to be connected are bent to some extent, the sliding piece 15 moves back and forth in the vertical groove 16 according to the rotation angle, and the sliding piece 15 is rotatably attached to the pin 13. Therefore, rotational power can be easily transmitted from the first shaft cylinder 11 to the second shaft cylinder 12 or in the opposite direction.

Next, a description will be given of the universal rotary power joint 23 according to the second embodiment of the present invention shown in FIGS. 4 to 7. In this embodiment, the first shaft cylinder 24 (second shaft cylinder 25 (same as above) is formed with a notch 26 for weight reduction, and a pin 27.28 is provided oppositely at the end thereof, and the pin 27.28
A sliding piece 29.3o having parallel portions on both sides is attached to the sliding piece 29.3o.

The outer cylinder 32 to which the sliding pieces 29 and 30 are attached is shown in FIG.
As shown in FIG. 6, the entire structure is cylindrical, and paired vertical grooves 31 are formed in orthogonal directions.

The assembled state is shown in FIG. 7. As shown in the figure, the sliding piece 29.3o is fitted into the longitudinal groove 31 of the outer cylinder 32, and the first and second shaft cylinders 24.25 are driven by rotational power. Power is transmitted from the first shaft cylinder 24 to the second shaft cylinder 25 through the outer cylinder 32.

Note that stoppers are provided on both sides of the outer cylinder 32 to prevent the sliding piece 29.3o from coming off.

8th Fg shows the pin 33 and sliding piece 34 of the universal rotary power joint according to the third embodiment of the present invention. 33, a sliding piece 34 is rotatably mounted thereon. This facilitates partial repair of the sliding piece 34.

FIG. 9 shows a universal rotary power joint 36 according to a fourth embodiment of the present invention, and as shown in the figure, the shaft cylinder 37 on one side has a bearing 39 (or bushing) and a pin 40 passing through the outer cylinder 38. It is rotatably attached via the shaft cylinder 4 on the other side.
1 is provided with pins 42, 43 as described above, and sliding pieces 44, 45 are rotatably attached to the pins 42, 43, respectively.

As a result, the position of the outer cylinder 38 can be fixed to the shaft cylinder 37, and during rotation, the sliding pieces 44, 45 move within the vertical grooves 46 formed in the outer cylinder 38, so that the rotating shaft is bent. power can also be transmitted smoothly.

FIG. 1O shows a universal rotary power joint 47 according to a fifth embodiment of the present invention. 48 and
A second shaft cylinder 49 attached to the other rotating shaft, a pin 50.51 provided perpendicularly around the first and second shaft cylinders 48.49, and each of the pins 50.51. A sliding piece 52, 53 which is attached freely to rotate, has parallel parts on both sides, and has an arc shape on the outside with a predetermined rotation radius.
(the second barrel side is not shown) and each sliding piece 5
2.53 into which are fitted, are formed on the inside, and an outer cylinder 62 in which the distance from the rotation center axis m to the groove bottoms 58 to 61 is equal to the rotation radius r above the groove. ing. In FIGS. 10 to 12, 63 indicates a keyway, and 64 indicates a stopper plate for preventing lateral movement of the outer cylinder 62.

Therefore, when using the universal rotary power joint 62,
Since the sliding pieces 52 and 53 move rotationally and also move in the axial direction, rotational power can be smoothly transmitted even if there is lateral movement, parallel movement, or inclination of the rotation axis.

In the second to fourth embodiments described above, in order to prevent the outer cylinder from moving laterally, it is preferable to provide a stopper plate as described above at the center of the outer cylinder or pull-out prevention plates on both sides of the outer cylinder.

Next, referring to FIG. 13, a universal rotary power joint 66 according to a sixth embodiment of the present invention will be described. As shown in the figure, the universal rotary power joint 66 is attached to one rotating shaft. a first shaft cylinder 67 mounted on the other rotating shaft, a second shaft cylinder 68 attached to the other rotating shaft, and first and second shaft cylinders 67.6.
Pins 69 and 70 provided perpendicularly around the 8
The sliding pieces 71, 72 are rotatably attached to each of the pins 69, 70, have parallel parts on both sides, and have an arc shape on the outside with a predetermined rotation radius r (on the second barrel side ) and vertical grooves 73 into which the respective sliding pieces 71 and 72 fit are formed inside, and the left and right outer cylinders 7
5.76, a piece 79.80 having a spherical part provided on a sliding shaft 77.78 formed at the inner tip of the first and second shaft cylinders 67.68, and the piece 79. .80 are rotatably and axially movably received in the sternum hole 83, and the sternum 82 is movable in the joint space 81 of the outer cylinder 75, 76 in a direction perpendicular to the center line of the outer cylinder 75, 76. It is composed of:

Therefore, when the first and second shaft tubes 67, 68 are bent so as to intersect at an angle α, the pieces 79, 80 tilt inside the sternum 82, which causes the sternum 82 to move a little within the space 81. However, the central axis of the integrated outer cylinder 75, 76 can always be maintained on the neutral line of the line of intersection with each shaft cylinder 67, 68, that is, at an angle of α/2 with each shaft cylinder 67, 68.

Thereby, in the universal rotary power joint 66, even if the first and second shaft cylinders 67, 68 have angular displacement, rotational force can always be transmitted at a constant speed. Also in this case, since the pieces 79 and 80 are movable in the axial direction within the sternum hole 83, there is nothing to restrict expansion and contraction in the axial direction, and there is no need to provide a spline or the like on one shaft.

〔Effect of the invention〕

As is clear from the above description, in the universal rotary power joint according to claim 1, the sliding piece attached to one shaft cylinder extends inside the vertical groove in the outer cylinder connected to the other shaft cylinder. Because it can be moved, even if the rotation axis is bent at the joint,
Power can be transmitted smoothly.

In use, the shaft cylinder can be lathed to form, for example, a key groove (which may also be a set screw), so that it can be attached to the rotating shaft, making it highly versatile.

Furthermore, in the universal rotary power joint according to claim 2, in addition to the above-mentioned effects, the outer cylinder is separate from the first and second shaft cylinders, and each is connected by a sliding piece. This allows for smooth power transmission while absorbing shaft bending, parallel movement, and axial movement.

In the universal rotary power joint according to claim 3, a piece is provided at the center of the opposing inner sides of the first and second shaft cylinders, and the piece is rotatably supported by a piece receiver.
Even if there is an angular displacement in the above-mentioned shaft cylinder, rotational motion can be transmitted at a constant velocity, and since the pieces can move in the axial direction, rotational power can be transmitted smoothly while absorbing axial movement. can.

[Brief explanation of the drawing]

FIG. 1 is a half sectional view of a universal rotary power joint according to a first embodiment of the present invention, FIGS. 2 and 3 are partial sectional views thereof, and FIG. FIG. 5 is a front view of the outer cylinder of the universal rotary power joint, FIG. 6 is a side view of the same, and FIG. 7 is a side showing the assembled state of the universal rotary power joint. 8 is a perspective view of parts of a universal rotary power joint according to a third embodiment of the present invention, and FIG. 9 is a side sectional view of a universal rotary power joint according to a fourth embodiment of the present invention. FIG. 10 is a sectional view of a universal rotary power joint according to a fifth embodiment of the present invention, FIG. 11 is a front view thereof, FIG. 12 is a sectional view taken along line ABCD in FIG. 10, and FIG. FIG. 6 is a sectional view of the universal rotary power joint according to the sixth embodiment. [Explanation of symbols]

Claims (3)

[Claims] (1) A universal rotary power joint that connects opposing rotating shafts, including a first shaft cylinder attached to one rotating shaft, a second shaft cylinder attached to the other rotating shaft, and a first shaft cylinder attached to the other rotating shaft. two or more pins provided radially around the shaft cylinder, sliding pieces rotatably attached to each of the pins and having parallel parts on both sides, and a vertical groove into which each of the sliding pieces fits. A universal rotary power joint comprising an outer cylinder formed on the inside and connected to the second shaft cylinder. (2) A universal rotary power joint that connects opposing rotating shafts, in which a first shaft cylinder is attached to one rotating shaft, a second shaft cylinder is attached to the other rotating shaft, and a first shaft cylinder is attached to the other rotating shaft. and two or more pins provided radially around the second shaft cylinder, each of which is rotatably attached to each pin, has parallel parts on both sides, and has an arc shape with a predetermined rotation radius on the outside. What is claimed is: 1. A universal rotary power joint comprising: sliding pieces; and an outer cylinder having a longitudinal groove formed inside thereof into which each sliding piece fits with a small gap. (3) A piece having a spherical surface is provided at the center of the opposing inner sides of the first and second shaft cylinders, and each piece is supported by a piece receiver movable in a direction perpendicular to the central axis of the outer cylinder. 3. The universal rotary power joint according to claim 2, wherein the rotary power joint is supported so as to be tiltable and movable in the axial direction.