WO1993013325A1

WO1993013325A1 - Shaft coupling

Info

Publication number: WO1993013325A1
Application number: PCT/JP1992/000435
Authority: WO
Inventors: Sadatomo Kuribayashi
Original assignee: Kay Seven Co., Ltd.
Priority date: 1991-12-27
Filing date: 1992-04-08
Publication date: 1993-07-08
Also published as: JPH05180236A; AU1580892A

Abstract

A shaft coupling characterized in that a driving shaft side mounting member (6) is mounted on the outer circumferential surface of an end portion (2) of a driving shaft, that metal driving shaft side sliding members (10a, 10b) each having a sliding external surface which is parallel to the X-Z plane are mounted on the mounting member, that a follower shaft side mounting member (8) is mounted on the outer circumferential surface of an end portion (4) of a follower shaft, that metal follower shaft side sliding members (12a, 12b) each having a sliding external surface which is parallel to the Y-Z plane are mounted on the mounting member, and that a disc-shaped rotational force transmitting member (14) is disposed which is provided with through holes each having a sliding internal surface slidable relative to the sliding external surface of the driving shaft side sliding member, and through holes each having a sliding internal surface slidable relative to the sliding external surface of the follower shaft side sliding member. This shaft coupling makes it possible not only to accommodate eccentricity, deflection angle and movement in a thrust direction between the driving shaft side and follower shaft side so as to transmit a rotational force smoothly and with a small loss but also to simplify the construction, assembling and maintenance.

Description

Details

[Technical field ]

The present invention relates to a shaft coupling, and more particularly to a shaft coupling which can satisfactorily cope with eccentricity, declination and movement in the thrust direction between a driving shaft side and a driven shaft side, and has a simple structure and assembly.

Reason

[Background Art]

At each end of the two rotating shafts in various torque transmission mechanisms

Shibu are connected by joints. For example, the output rotation shaft of the motor and the input rotation shaft of the pump are connected by a joint. In this case, it takes considerable effort to carefully install the motor and the pump so that the output rotation axis of the motor and the input rotation axis of the pump are sufficiently aligned. In addition, even if the installation is performed with due care for such alignment, some eccentricity and eccentricity remain between both rotating shafts, and furthermore, motors and pumps generate vibration during operation. Therefore, in order to absorb these in a joint portion, a flexible joint using a flexible member such as a panel or rubber has been conventionally used. An Oldham coupling is used as a joint that can cope with eccentricity, eccentricity, and thrust movement.

In such a shaft coupling, an appropriate mounting member is attached to each of the driving shaft end and the driven shaft end, and the driving shaft side mounting member and the driven shaft side mounting member are connected by an appropriate mechanism. It is common.

[Disclosure of the Invention]

INDUSTRIAL APPLICABILITY The present invention can satisfactorily deal with eccentricity, eccentricity, and thrust direction movement between the driving shaft side and the driven shaft side, is simple in structure and assembly, and can reduce the size of the torque transmission mechanism The purpose is to provide a new joint made of steel.

Another object of the present invention is to provide a shaft coupling having the above-described novel structure, capable of smoothly transmitting a rotational force, and being easy to maintain.

According to the present invention,

An end of the driving shaft and an end of the driven shaft are opposed to each other, and a driving shaft side mounting member is mounted on the outer peripheral surface of the driving shaft end, and the driving shaft side mounting member is mounted on the driving shaft side mounting member. A drive shaft side slide member having a pair of slide surfaces parallel to the surface in the first direction passing through the center and extending to the driven side is mounted.

A driven shaft-side mounting member is mounted on the outer peripheral surface of the driven shaft end, and the driven shaft-side mounting member has a pair of slide surfaces parallel to a surface in the second direction passing through the center of rotation of the driven shaft. And a driven shaft side slide member that is extended to the prime mover side is attached.

A rotational force transmitting member is disposed between the driving shaft side mounting member and the driven shaft side mounting member, and the rotational force transmitting member is a slide surface that forms a pair with the driving shaft side slide member. A pair slidable in a plane parallel to the plane in the first direction. And a second slide surface slidable in a plane parallel to the second direction surface with respect to a slide surface forming a pair of the driven shaft side slide member. A shaft coupling, which is characterized by having

Is provided.

In one embodiment of the present invention, at least the sliding surface of the driving shaft side slide member and at least the sliding surface of the driven shaft side slide member are made of metal. At least the first slide surface and the second slide surface of the rotational force transmitting member are made of plastic.

In another aspect of the present invention, the driving shaft side slide member is detachably attached to the driving shaft side mounting member, and the driven shaft side slide member is attached to the driven shaft side mounting member. It is mounted so that it can be removed.

In still another aspect of the present invention, the driving shaft side attachment member is detachably attached to the driving shaft end, and the driven shaft side attachment member is detached from the driven shaft end. Mounted as possible.

In the present invention, the rotational force transmitting member is preferably plate-shaped. Further, a gap can be formed in the torque transmitting member for receiving the tip of the driving shaft end and the tip of the driven shaft end.

In the present invention, it is preferable that the first direction is orthogonal to the second direction.

[Brief description of drawings] FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention, and FIG. 2 is a partial sectional view thereof. FIG. 3 is a schematic explanatory view showing an example of a torque transmitting mechanism to which the shaft coupling of the present embodiment is applied.

FIG. 4 is an exploded perspective view showing a second embodiment of the shaft coupling according to the present invention.

FIG. 5 is an exploded perspective view showing a third embodiment of the shaft coupling according to the present invention.

FIG. 6 is an exploded perspective view showing a fourth embodiment of the shaft coupling according to the present invention.

[Best Mode for Carrying Out the Invention]

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention, and FIG. 2 is a partial sectional view thereof. In these figures, 2 is the end of the driving shaft, and 2 'is the center of rotation of the driving shaft. Reference numeral 4 denotes an end of the driven shaft, and 4 'denotes a center of rotation of the driven shaft. The driving shaft end 2 and the driven shaft end 4 face each other and are arranged so that the rotation centers 2 ′ and 4 ′ coincide with each other in the Z direction.

A metal driving shaft side mounting member 6 is mounted on the outer peripheral surface of the driving shaft end 2. This mounting is performed by key connection, spline connection or other appropriate means such as press-fitting. The driven-side end face of the mounting member 6 is positioned substantially flush with the driven-side end face of the driving shaft end 2. Is set to Mounting On the outer peripheral surface of the member 6, two metal driving shaft side slide members 10a and 10b are detachably mounted by bolts at positions symmetrical with respect to the driving shaft rotation center 2. These slide members 10a and 10b are extended portions 10a-1 and 10a-2 and 10a, respectively, which can extend further from the driven-side end surface of the driving shaft-side mounting member 6 to the driven side. b-1 and 10 b-2, and each of these extensions has a pair of slide outer surfaces parallel to the X-Z plane. The dimension (Y-direction dimension) between the slide outer surfaces forming a pair of the extending portions is W, and the dimension in the X-direction perpendicular to the dimension is W.

Similarly, a driven shaft side mounting member 8 made of metal is mounted on the outer peripheral surface of the driven shaft end 4. This mounting is performed by a key connection, a spline connection, or other appropriate means such as press-fitting, and the driving-side end surface of the mounting member 8 is positioned substantially in the same plane as the driving-side end surface of the driven shaft end 4. Is set to. Two metal driven shaft side slide members 12a and 12b are detachably mounted on the outer peripheral surface of the mounting member 8 by bolts at symmetrical positions with respect to the driven shaft rotation center 4 '. ing. These slide members 12 a and 12 b are extended portions 12 a — 1, 12 a — 2, and 12 2, respectively, that extend further from the driven end surface of the driven shaft side mounting member 8 toward the driving side. b — 1, 1 2 b — 2 (not shown), and each of these extensions has a pair of slide outer surfaces parallel to the Y—Z plane. As with the drive shaft side, each extension The dimension between the slide outer surfaces forming the minute pair (dimension in the X direction) is W, and the dimension in the Y direction orthogonal to this is LL.

Reference numeral 14 denotes a rotational force transmitting member disposed between the driving shaft side mounting member 6 and the driven shaft side mounting member 8. The rotational force transmitting member 14 has a disk shape parallel to the XY plane, and includes eight through holes 16a-1, 16a-12, 16b through which it can penetrate in the Z direction. 1, 16 b — 2, 2, 18 a — 1, 18 a — 2, 18 b — 1, and 18 b — 2 are formed. The through-holes 16a-1, 16a-2, 16b-1 and 16b-2 each have a first slide inner surface that is parallel to the XZ plane. Each of the through holes 18a-1, 18a-2, 18b-1 and 18b-2 has a pair of second slide inner surfaces parallel to the YZ plane. The dimension between the slide inner surfaces forming a pair of these through holes is W, and the dimension in the direction orthogonal to this is L ₂ (> L!). The through-holes 16a-1 and 16a-2 receive the drive shaft side slide member extending portions 10a-1 and 10a-2 with a margin at both ends in the X direction. The through holes 16b-1 and 16b-2 receive the driving shaft side slide member extension 10b-1 and 1Ob-2 at both ends in the X direction with a margin. The through-holes 18a-1 and 18a-2 receive the above-mentioned driven shaft side slide part extending part 12a-1 and 12a-2 at both ends in the Y direction with a margin. The through-holes 18b-1 and 18b-2 receive the driven shaft side slide member extending portions 12b-1 and 12b-2 with a margin at both ends in the Y direction. Scratch Then, the slide outer surface of each of the slide member extending portions is slidable on the corresponding inner surface of the through-hole slide of the rotational force transmitting member 14 and the contact surface thereof.

The rotational force transmitting member 14 is suitable for the metallic material of the driving shaft side sliding members 10a, 10b and the driven shaft side sliding members 12a, 12b, for example, iron. A plastic material, such as a polyacetal resin or a polyamide resin, having a high degree of lubricity, having an appropriate strength, and having an appropriate flexibility can be used.

Thus, in the present embodiment, the rotational force transmitting member 14 moves the slide member in the X direction with respect to the driving shaft side slide members 10a and 10b, and slides in the Z direction. By moving and rotating about the Y direction as the center, it can move relative to the driving shaft side mounting member 6 and slide in the Y direction relative to the driven shaft side sliding members 12a and 12b. Movement, slide movement in the Z direction, and rotation about the X direction allow relative movement with respect to the driven shaft-side mounting member 8.

In this embodiment, when the driving shaft end 2 rotates, the rotational force is transmitted from the driving shaft side slide members 10 a and 10 b attached to the driving shaft side mounting member 6 to the torque transmitting member 14. Is transmitted to the driven shaft side mounting member 8 to which the driven shaft side slide members 12a and 12b are mounted, and the driven shaft end 4 is rotated. If the drive shaft end 2 and the driven shaft end 4 are eccentric, deflected, or moved in the thrust direction, the rotational force transmitting member 14 and the drive shaft side slide member are moved as described above. 1 The relative movement between 0a and 10b and the relative movement between the rotational force transmitting member 14 and the driven shaft side slide members 12a and 12b can be satisfactorily dealt with. As shown in FIG. 2, the distance D between the driving shaft end 2 and the driven shaft end 4 is larger than the thickness T of the rotational force transmitting member 14 by the expected thrust movement. Is set properly.

The shaft coupling of the present embodiment as described above can be easily manufactured by assembling the constituent members as shown in FIG. The rotation force transmitting member 14 is replaced without moving the driving shaft end portion 2 and the driven shaft end portion 4 and the driving shaft side mounting member 6 and the driven shaft side mounting member 8 without moving the driving shaft. It is easy to do by simply removing the shaft side slide members 10a and 10b from the driving shaft side mounting member 6 and removing the driven shaft side slide members 12a and 12b from the driven shaft side mounting member 8. be able to.

In this embodiment, the driving shaft side mounting member 6 is mounted on the outer peripheral surface of the driving shaft end 2, and the driven shaft side mounting member 8 is mounted on the outer peripheral surface of the driven shaft end 4. The distance between the driving shaft end 2 and the driven shaft end 4 can be set to the minimum necessary, thereby shortening the axial length of the entire rotational force transmission mechanism and miniaturizing it. Is possible.

In addition, a Z-direction through-hole having an inner diameter slightly larger than the outer diameter of the driving shaft end 2 and the driven shaft end 4 is formed in the center of the rotational force transmitting member 14, and the driving shaft is inserted in the through-hole. End 2 The leading end of the drive shaft end 4 is housed, the driven end surface of the drive shaft side mounting member 6 is located behind the leading end of the drive shaft end 2, and the driven side end surface of the driven shaft side mounting member 8 is driven. By positioning the shaft end portion 4 behind the tip end, the entire length of the rotational force transmission mechanism in the axial direction can be further reduced, and the size can be further reduced.

In the present embodiment, when a member made of a plastic material is used as the rotational force transmitting member 14, the member has moderate flexibility, so that the vibration transmission between the driving shaft side and the driven shaft side is suppressed. Further, it is possible to smoothly change the rotational force transmission in the case of a sudden load change, etc., and further, the drive shaft side slide members 10a, 10b and the driven shaft side slide members 12a, 1b 2 Self-lubricating in sliding contact with 2b eliminates the need for lubricating oil, simplifies maintenance, and provides an electrical connection between the driving shaft and the driven shaft. Can be insulated to

In the present embodiment, the driving shaft side slide members 10a and 10b and the driven shaft side slide members 12a and 12b each have two extending portions, and these extending portions are Since each is in sliding contact with the rotational force transmitting member 14, the contact area for transmitting the rotational force is large, the load per unit area is small, and the wear is small.

This embodiment is not based on the deformation of the flexible member alone as in the conventional flexible joint, so that the energy loss is small and the efficiency of torque transmission is good. In addition, In the embodiment, since the torque transmitting member is plastic and lightweight, even if the torque transmitting member moves elliptically based on eccentricity and its change during high-speed rotation, there is little vibration due to the eccentricity.

FIG. 3 is a schematic explanatory view showing an example of a torque transmitting mechanism to which the shaft coupling of the present embodiment is applied. The end of the output rotary shaft of the motor M is the driving shaft end 2 of the shaft coupling C of the present invention, and the end of the input rotary shaft of the pump P as the driven device is the driven shaft end of the shaft coupling C of the present invention. It is part 4.

When connecting with the shaft coupling C, the mounting member 6 is adapted to the output rotation shaft end 2 of the motor M, the mounting member 8 is adapted to the input rotation shaft end 4 of the pump P, and the motor M The pump P is installed and fixed, the rotational force transmitting member 14 is disposed between the mounting member 6 and the mounting member 8, and the angular positions of the mounting member 6 and the mounting member 8 around the Z direction are appropriately set. Fix the slide members 10a, 10b and 12a, 12b to the mounting members 6, 8 with the protruding portions adapted to the corresponding through holes of the torque transmitting member 14. At this time, it is not necessary to strictly remove the eccentricity between the driving shaft end 2 and the driven shaft end 4, remove the eccentricity, and position in the thrust direction.For example, the eccentricity is lmm, the eccentricity is 1 degree and Thrust direction position error force S 1 mm.

To release the connection by the shaft coupling C, the reverse operation to the above connection may be performed.

Therefore, according to the present embodiment, as described above, By removing to the torque transmitting member to be replaced and using the torque transmitting member to mount in the reverse process of the removal, the driving shaft side device and the driven shaft side connected by the shaft coupling Repairs can be made quickly without having to move both equipment and equipment completely, and downtime is extremely short.

FIG. 4 is an exploded perspective view showing a second embodiment of the shaft coupling according to the present invention. In these figures, members having the same functions as those in FIGS. 1 to 3 are denoted by the same reference numerals. In this embodiment, the drive shaft side slide members 10a-11, 10a-2, 10b-1 and 10b-2 are formed on the driven shaft end surface of the drive shaft side mounting member 6. In addition, the driven shaft side slide members 12 a-1, 12 a-2, 12 b-1, and 12 b-2 are formed on the driven shaft end surface of the driven shaft side mounting member 8. Each of the slide members has a pair of slide surfaces, a dimension between these slide surfaces is W, and a dimension in a direction orthogonal to this is L i. The rotating force transmitting member 14 has eight through holes 16a-1, 16a-2, 16b-which receive the driving shaft side sliding member and the driven shaft side sliding member, respectively. 1, 16 b-2, 18 a-1, 18 a-2, 18 b-1, 18 b-2 are formed. The dimension between the inner surfaces of the slides forming a pair of these through holes is W, and the dimension in the direction orthogonal to this is L ₂ (> L!). This embodiment has the same effects as some effects of the first embodiment. ' FIG. 5 is an exploded perspective view showing a third embodiment of the shaft coupling according to the present invention. In these drawings, members having the same functions as those in FIGS. 1 to 4 are denoted by the same reference numerals. In this embodiment, the number of the drive shaft side slide members, the number of the driven shaft side slide members, and the number of the through holes (16a, 16b, 18a, 18b) of the torque transmitting member are reduced. This is different from the second embodiment only. This embodiment has the same operation and effect as the second embodiment.

FIG. 6 is an exploded perspective view showing a fourth embodiment of the shaft coupling according to the present invention. In these drawings, members having the same functions as those in FIGS. 1 to 5 are denoted by the same reference numerals. In this embodiment, the rotational force transmitting member 14 is composed of four plates 14a, 14b, 14c, and 14d bundled and held by a holding ring 14e. Each plate has four openings that form through holes 16a, 16b, 18a, and 18b, and two protrusions 15a and Z formed on one side that are symmetrical in the Z direction. And two holes 15b formed at positions symmetrical with respect to the direction. The adjacent plates 14a, 14b, 14c, and 14d are fitted with the projection 15a and the hole 15b. In the figure, the driven side edge of the retaining ring 14 e is not bent inward, but in the assembled state, it is bent inward in the same shape as the driving side edge. The four plates are held tightly together. This embodiment has the same effects as the third embodiment. In addition, as in this embodiment, In addition, when the rotational force transmitting member 14 is configured by using a plurality of plates, the rotational force transmitting member having a desired thickness can be easily obtained by changing the number of used plates. it can.

In the above embodiment, the case where the sliding member is made of metal and the torque transmitting member is made of plastic is shown, but both may be made of metal or both may be made of plastic. It may be.

[Industrial applicability]

As described above, according to the present invention, eccentricity, eccentricity, and movement in the thrust direction between the driving shaft side and the driven shaft side can be satisfactorily dealt with, and torque can be transmitted smoothly and with low loss. A shaft coupling is provided which is easy to construct, assembles and maintains.

The shaft coupling of the present invention can be manufactured from a small diameter (for example, about 20 mm in diameter) to a large diameter (for example, about 600 mm in diameter), and is used in various torque transmission mechanisms. be able to.

Claims

The scope of the claims

1. The drive shaft end and the driven shaft end are

0,

A driving shaft side mounting member is mounted on the outer peripheral surface of the driving shaft end, and the driving shaft side mounting member has a pair of slide surfaces parallel to a surface in the first direction passing through the center of rotation of the driving shaft. A drive shaft side slide member that has a length and can be extended to the driven side is attached.

A driven shaft-side mounting member is mounted on the outer peripheral surface of the driven shaft end, and a pair of slides parallel to a surface in the second direction passing through the driven shaft rotation center are attached to the driven shaft-side mounting member. A driven shaft side slide member having a surface and extending to the driving side is attached.

A rotational force transmitting member is disposed between the driving shaft side mounting member and the driven shaft side mounting member, and the rotational force transmitting member is a slide surface that forms a pair with the driving shaft side slide member. In contrast, the first slide surface, which forms a pair slidable in a plane parallel to the first direction surface, and the second slide surface, which forms a pair of the driven shaft side slide member, A shaft coupling having a pair of second slide surfaces slidable in parallel planes.

2. At least the slide surface of the driving shaft side slide member and at least the slide surface of the driven shaft side slide member are made of metal, and the rotation force transmission member is small. The shaft coupling according to claim 1, wherein at least the first slide surface and the second slide surface are made of plastic.

3. The drive shaft side slide member is detachably attached to the drive shaft side attachment member, and the driven shaft side slide member is detachably attached to the driven shaft side attachment member. The shaft coupling according to claim 1, wherein the shaft coupling is provided.

4. The driving shaft side mounting member is detachably attached to the driving shaft end, and the driven shaft side mounting member is detachably mounted to the driven shaft end. Shaft coupling according to range 1.

5. The shaft coupling according to claim 1, wherein the rotational force transmitting member has a plate shape.

6. The shaft coupling according to claim 1, wherein a gap is formed in the rotational force transmitting member to receive the tip of the driving shaft end and the tip of the driven shaft end.

7. The shaft coupling according to claim 1, wherein the first direction and the second direction are orthogonal to each other.