JPH05133423A - Shaft joint - Google Patents

Abstract

PURPOSE:To make a bearing joint follow the eccentricity, deflection angle and thrust movement between a driving shaft, side and a driven shaft side, and provide size reduction, simple structure and easy assembling. CONSTITUTION:A metallic driving shaft side installing member 6 is installed by tightening it at the cylindrical outer peripheral surface of a driving shaft edge part 2, and the installing member is provided with a pair of slide outer surfaces 7 which are parallel to an X-Y plane. Besides, a metallic driven shaft side installing member 8 is installed by tightening it at the cylindrical outer peripheral surface of a driven shaft edge part 4. The installing member is provided with a pair of slide outer surfaces 9 which are parallel to a Y-Z plane, and a cylindrical plastic rotational force transmitting member 14 which is provided with a pair of the first slide inner surfaces 15a which can slide on a pair of the slide outer surfaces 7 respectively and a pair of the second slide inner surfaces which can slide on a pair of the slide outer surfaces 9 respectively is disposed. Moreover, rubber stoppers 16, 18 which regulate the Z direction position of the rotational force transmitting member 14 are installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling, and more particularly to a shaft coupling which can easily deal with eccentricity, declination and thrust movement between a driving shaft side and a driven shaft side, and which is simple in structure and assembly.

[0002]

2. Description of the Related Art In various torque transmission mechanisms, the ends of two rotary shafts are connected by a joint. For example, the output rotary shaft of the motor and the input rotary shaft of the pump are connected by a joint. In this case, it takes a great deal of effort to carefully install the motor and the pump so that the output rotation shaft of the motor and the input rotation shaft of the pump are sufficiently aligned. In addition, even if you pay attention to such alignment and install it, some eccentricity and declination remain between both rotating shafts, and further vibration occurs in the motor and pump during operation, In order to absorb these in the joint portion, a flexible joint using a flexible member such as a spring or a wire has been conventionally used. Also,
An Oldham joint is used as a joint capable of coping with eccentricity and declination.

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

The present invention provides a shaft coupling having a novel structure which can cope with eccentricity, declination, and thrust movement between the driving shaft side and the driven shaft side, can be downsized, and is simple in structure and assembly. It is intended to be provided.

Another object of the present invention is to provide a shaft coupling having the above-mentioned novel structure, capable of smoothly transmitting the rotational force, and easily maintained. A further object of the invention is
An object of the present invention is to provide a shaft coupling to which a mounting member can be attached without machining the shaft end into a special shape.

[0006]

According to the present invention, in order to achieve the above object, a driving shaft end portion and a driven shaft end portion are opposed to each other, and a driving force is provided on an outer peripheral surface of the driving shaft end portion. A shaft-side mounting member is removably mounted, and the driving-shaft-side mounting member has a pair of slide outer surfaces parallel to a surface in the first direction passing through the center of rotation of the driving shaft, and the outer periphery of the driven shaft end portion. The driven shaft side mounting member is removably mounted on the surface, and the driven shaft side mounting member passes through the driven shaft rotation center.
Has a pair of slide outer surfaces parallel to the direction surface, and a cylindrical rotational force transmitting member is arranged radially outward of the driving shaft side mounting member and the driven shaft side mounting member. The transmission member is slidable on a pair of first slide inner surfaces which are respectively slidable on a pair of slide outer surfaces of the driving shaft side mounting member and on a pair of slide outer surfaces of the driven shaft side mounting member. And a pair of second slide inner surfaces, the shaft coupling being provided.

In the present invention, the driving shaft side mounting member and the driven shaft side mounting member are made of metal, and the rotational force transmitting member is made of plastic. The driving shaft side with respect to the outer peripheral surface of the driving shaft end portion. The mounting of the mounting member and the mounting of the driven shaft side mounting member to the outer peripheral surface of the driven shaft end are both performed by tightening the mounting member to the cylindrical outer peripheral surface of the shaft end, the driving shaft end A driving shaft side stopper for restricting the position of the rotational force transmitting member in the direction of the rotational center of the driving shaft is detachably attached to the outer peripheral surface of the driven shaft, and the rotational force transmitting member is attached to the outer peripheral surface of the end of the driven shaft. A driven shaft side stopper for restricting the position of the member in the rotation center direction of the driven shaft is detachably attached, and the first direction and the second direction are orthogonal to each other. Like, there is.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below 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, FIG. 2 is a vertical sectional view of its assembled state, and FIG. 3 is its AA sectional view.

In these figures, 2 is a cylindrical driving shaft end portion, and 2'is a driving shaft rotation center. Also, 4
Is a cylindrical driven shaft end, and 4'is a driven shaft rotation center. The driving shaft end portion 2 and the driven shaft end portion 4 are arranged so as to face each other and the rotation centers 2 ′ and 4 ′ coincide with each other in the Z direction.

A metallic driving shaft side mounting member 6 is attached to the outer peripheral surface of the driving shaft end 2. The mounting member is Z
Direction through hole, and the inner surface of the through hole is fitted to the outer peripheral surface of the driving shaft end. As shown in the drawing, the mounting member 6 is formed with a slit in the plane parallel to the YZ plane so as to reach the through hole from the outside, and a portion adjacent to the slit is formed in the X direction. Bolt 10
The mounting member 6 is mounted by tightening through. The outer peripheral surface of the driving shaft side mounting member 6 is X-
It consists of a pair of planes parallel to the Z plane and a pair of planes parallel to the YZ plane. Of these planes, 1 parallel to the XZ plane
The pair of flat surfaces are the slide outer surfaces 7, and the distance between them is L.

Similarly, a driven shaft side mounting member 8 made of metal is attached to the outer peripheral surface of the driven shaft end portion 4. The mounting member has a through hole in the Z direction, and the inner surface of the through hole is fitted to the outer peripheral surface of the driven shaft end portion. As shown in the figure, the mounting member 8 is formed with a slit in the plane parallel to the XZ plane so as to reach the through hole from the outside, and a portion adjacent to the slit is formed in the Y direction. The mounting member 8 is mounted by tightening the bolt 12 through the bolt. The outer peripheral surface of the driven shaft side mounting member 8 is composed of a pair of planes parallel to the XZ plane and a pair of planes parallel to the YZ plane. Of these planes, a pair of planes parallel to the YZ plane are the slide outer surfaces 9, and the distance between them is L.

Reference numeral 14 is a torque transmission member. The rotational force transmitting member 14 is located so as to cover both the driving shaft side mounting member 6 and the driven shaft side mounting member 8 in a radially outward direction, and one portion in the axial direction is mounted on the driving shaft side. The member 6 is in contact with the driven shaft side mounting member 8 at the other part. That is, the rotational force transmitting member 14 has a tubular shape in the Z direction, and its inner surface is composed of a pair of flat surfaces parallel to the XZ plane and a pair of flat surfaces parallel to the YZ plane. A pair of planes parallel to the X-Z plane is a first slide outer surface 15a slidable with the slide outer surface 7 of the driving shaft side mounting member, and the distance between them is L. A pair of flat surfaces parallel to the YZ plane is a second slide outer surface 15b slidable with the slide outer surface 9 of the driven shaft side mounting member, and the distance between them is L.

The rotational force transmitting member 14 is made of a plastic material. The plastic material has a proper sliding property with respect to the metal material of the driving shaft side mounting member 6 and the driven shaft side mounting member 8, has a suitable strength, and further has a suitable flexibility. A synthetic resin having, for example, a polyacetal resin or a polyamide resin can be used. The plastic rotational force transmitting member 22 has self-lubricating property and continuously performs a lubricating action in contact with the slide outer surface 7 of the driving shaft side mounting member 6 and the slide outer surface 9 of the driven shaft side mounting member 8.

As shown in FIG. 2, the driving shaft end portion 2 and the driven shaft end portion 4 are arranged facing each other with a space T therebetween.
Further, rubber stoppers 16 and 18 are removably attached to the driving shaft end portion 2 and the driven shaft end portion 4, respectively, to restrict the position of the rotational force transmitting member 14 in the Z direction by these stoppers. The engagement between the side mounting member 6 and the driven shaft side mounting member 8 is maintained.

Thus, in this embodiment, in the rotational force transmitting member 14, the first slide inner surface 15a slides in the X direction with respect to the slide outer surface 7 of the driving shaft side mounting member,
The sliding movement in the Z direction and the rotation around the Y direction enable relative movement with respect to the driving shaft side mounting member 6, and the second slide inner surface 15b with respect to the sliding outer surface 9 of the driven shaft side mounting member in the Y direction. Can be moved relative to the driven shaft side mounting member 8 by performing the slide movement, the Z movement in the Z direction, and the rotation around the X direction.

In this embodiment, when the driving shaft end portion 2 is rotated, its rotational force is transmitted from the driving shaft side mounting member 6 to the driven shaft side mounting member 8 via the rotational force transmitting member 14, and the driven shaft end portion 8 is driven. The part 4 is rotated. When eccentricity, declination, or thrust movement occurs between the driving shaft end 2 and the driven shaft end 4, relative movement between the rotational force transmitting member 14 and the driving shaft side mounting member 6 as described above and Rotational force transmission member 14
The relative movement between the driven shaft side attachment member 8 and the driven shaft side attachment member 8 can be dealt with well. The interval T between the driving shaft side mounting member 6 and the driven shaft side mounting member 8 may be appropriately determined according to the expected eccentricity, declination, or thrust movement. The spacing between the pair of outer surfaces of the outer peripheral surfaces of the driving shaft side mounting member 6 and the driven shaft side mounting member 8 other than the slide outer surface is also the same.

The shaft coupling of this embodiment as described above can be easily manufactured by assembling the constituent members as shown in FIG. Particularly, in this assembly, since the mounting members 6 and 8 are fixed to the driving shaft end 2 and the driven shaft end 4 by tightening, respectively, the phase (rotation angle) of the driving shaft end 2 and the driven shaft end 4 are fixed. The operation to match the phase of is unnecessary. Further, the driving shaft end portion 2 and the driven shaft end portion 4 do not need to be specially processed and may remain in a cylindrical shape. Then, at the time of disassembly, one of the stoppers 16 and 18 is attached to the rotational force transmitting member 14
After moving in the Z direction so as to move away from the driving shaft and moving the rotational force transmitting member 14 in that direction, one of the driving shaft end portion 2 and the driven shaft end portion 4 is moved away from the other driving shaft side mounting member. 6 and the driven shaft side mounting member 8 are moved by a distance substantially corresponding to the thickness (dimension in the Z direction) to slightly widen the distance between the driving shaft end 2 and the driven shaft end 4 and tighten through this distance. After release, the driving shaft side mounting member 6 and the driven shaft side mounting member 8 can be removed.

In this embodiment, the driving shaft side mounting member 6 is mounted on the outer peripheral surface of the driving shaft end portion 2, and the driven shaft side mounting member 8 is mounted on the outer peripheral surface of the driven shaft end portion 4. Therefore, the distance T between the driving shaft end 2 and the driven shaft end 4 is
Can be minimized, which allows the axial length to be short and the size to be reduced.

In this embodiment, since the rotational force transmitting member 14 has an appropriate degree of flexibility, it is possible to suppress vibration transmission between the driving shaft side and the driven shaft side, and to further prevent the rotational force when a sudden load change occurs. The transmission can be changed smoothly.

Further, in this embodiment, the rotational force transmitting member 14
Since it exhibits self-lubricating properties in sliding contact with the driving shaft side mounting member 6 and the driven shaft side mounting member 8, it is not necessary to use lubricating oil and maintenance is simple.

FIG. 4 is an exploded perspective view showing a second embodiment of the shaft coupling according to the present invention, FIG. 5 is a vertical sectional view in its assembled state, and FIG. 6 is a sectional view taken along line BB thereof. In these figures, members having the same functions as those in FIGS. 1 to 3 are designated by the same reference numerals. In this example,
Only the direction of the slit of the driving shaft side mounting member 6 and the direction of the slit of the driven shaft side mounting member 8 are different from those of the first embodiment, and the same operational effect as that of the first embodiment is obtained.

In the above embodiment, the mounting of the driving shaft side mounting member 6 on the outer peripheral surface of the driving shaft end 2 and the mounting of the driven shaft side mounting member 8 on the outer peripheral surface of the driven shaft end 4 are both shafts. The mounting members 6 and 8 are fastened to the cylindrical outer peripheral surfaces of the end portions 2 and 4, but in the present invention, a key or spline may be used for mounting these, and further, the cylindrical shape of the shaft end portion. The outer peripheral surface can be attached by press fitting without or after processing.

[0024]

As described above, according to the present invention, it is possible to satisfactorily deal with the eccentricity, the angle of deviation, and the thrust movement between the driving shaft side and the driven shaft side, and it is possible to reduce the size and the structure and assembly. A shaft coupling having a new structure that is simple to provide is provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention.

FIG. 2 is a vertical sectional view of a shaft coupling according to a first embodiment of the present invention in an assembled state.

3 is a cross-sectional view taken along the line AA of FIG.

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

FIG. 5 is a vertical sectional view of a shaft coupling according to a second embodiment of the present invention in an assembled state.

6 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 2 Drive shaft end 2'Drive shaft rotation center 4 Driven shaft end 4'Drive shaft rotation center 6 Drive shaft side mounting member 7 Slide outer surface 8 Driven shaft side mounting member 9 Slide outer surface 10 Bolt 12 Bolt 14 Rotational force transmission member 15a Inner surface of first slide 15b Inner surface of second slide 16 Stopper 18 Stopper

Claims (5)

[Claims] 1. A drive shaft end portion and a driven shaft end portion are arranged to face each other, and a drive shaft side attachment member is detachably attached to an outer peripheral surface of the drive shaft end portion. The member has a pair of slide outer surfaces that are parallel to the surface in the first direction passing through the center of rotation of the driving shaft, and the driven shaft side mounting member is detachably mounted on the outer peripheral surface of the driven shaft end. The shaft-side mounting member has a pair of slide outer surfaces that are parallel to the surface in the second direction passing through the rotation center of the driven shaft, and the driving-shaft-side mounting member and the driven-shaft-side mounting member have a tubular shape radially outward. A rotational force transmitting member is disposed, and the rotational force transmitting member is a pair of first slide inner surfaces slidable with respect to the pair of slide outer surfaces of the driving shaft side mounting member, and the driven shaft side mounting member. A pair of second slidable outer surfaces respectively A shaft coupling having an inner surface of a slide. 2. The shaft coupling according to claim 1, wherein the driving shaft side mounting member and the driven shaft side mounting member are made of metal, and the rotational force transmitting member is made of plastic. 3. The mounting of the driving shaft side mounting member to the outer peripheral surface of the driving shaft end and the mounting of the driven shaft side mounting member to the outer peripheral surface of the driven shaft end are both cylindrical shapes of the shaft end. The shaft coupling according to claim 1, which is formed by tightening a mounting member to the outer peripheral surface. 4. A drive shaft side stopper for restricting the position of the rotational force transmitting member in the direction of the rotation center of the drive shaft is detachably attached to the outer peripheral surface of the drive shaft end, and the driven shaft end is attached. The shaft coupling according to claim 1, wherein a driven shaft side stopper for restricting the position of the rotational force transmitting member in the driven shaft rotation center direction is detachably attached to the outer peripheral surface of the portion. 5. The shaft coupling according to claim 1, wherein the first direction and the second direction are orthogonal to each other.