JP2005147325A - Shaft coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft coupling capable of reducing exchange frequencies of these members by decreasing abrasion of a member on a drive shaft side and a driven shaft side and a torque transmission member. <P>SOLUTION: A bearing member 12 provided between a slide outer face 7A inside an XZ face formed in the drive shaft side member 6 and a first slide inner face 11A formed in a drive side portion 10A of the torque transmission member comprise a first face 13A which slides and contacts the slide outer face 7A and a second face 13A' which slides and contacts the first slide inner face 11A. A bearing member 14 provided between a slide outer face 9B inside the YZ face formed in a driven shaft side member 8 and a second slide inner face 11B formed in the driven side portion 10B of the torque transmission member comprises a third face 15B which slides and contacts the slide outer face 9B and a fourth face 15B' which slides and contacts the second slide inner face 11B. The torque transmission member works so that the drive side portion 10A and the driven side portion 10B are detachably joined. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shaft coupling, and more particularly to an improvement of an Oldham shaft coupling.

  The Oldham shaft coupling has a simple structure and can cope with the eccentricity between the driving shaft and the driven shaft, and has been used for a long time in the rotational force transmission systems of various mechanical devices.

In a general Oldham shaft coupling, the driving shaft side member attached to the driving shaft and the driven shaft side member attached to the driven shaft are arranged with their rotation centers substantially in common, and these driving shaft side members And a rotational force transmitting member for transmitting rotational driving force between the driven shaft side member and the driven shaft side member. A groove extending in a first direction substantially perpendicular to the center of rotation is formed on one of the driving shaft side member and the rotational force transmitting member, and a protrusion that fits the groove is formed on the other side. Thus, one of the driven shaft side member and the rotational force transmitting member is formed with a groove extending in a direction substantially orthogonal to the rotation center and substantially orthogonal to the first direction, and the other is adapted to the groove. Convex ridges are formed. Thereby, relative movement (sliding) in the first direction between the driving shaft side member and the rotational force transmission member is enabled, and the first movement between the driven shaft side member and the rotational force transmission member is enabled. The relative movement (sliding) in the two directions is possible, and thus the eccentricity between the driving shaft and the driven shaft can be absorbed to transmit the rotational driving force from the driving shaft to the driven shaft. In addition, the engagement between the driving shaft side member and the rotational force transmission member and the engagement between the rotational force transmission member and the driven shaft side member can be moved relative to each other in the direction of the rotation center, so Rotational driving force is transmitted from the driving shaft to the driven shaft while absorbing the declination between the shaft and allowing relative movement (sliding) in the direction of the rotation center between the driving shaft and the driven shaft. Can do. Such a shaft coupling is described in, for example, Japanese Patent Laid-Open No. 6-200953 (Patent Document 1).
Japanese Patent Application Laid-Open No. 6-200953

  However, in the conventional Oldham shaft joint, the sliding between the driving shaft side member and the rotational force transmitting member is made by direct contact between the sliding surfaces of grooves or ridges formed in these members. The sliding between the driven shaft side member and the rotational force transmitting member is performed by direct contact between the sliding surfaces of grooves or ridges formed in these members.

  For this reason, the sliding surfaces of these members are easily worn, and it is difficult to reduce the frequency of troublesome replacement of the driving shaft side member, the driven shaft side member, and the rotational force transmission member with new ones. It was.

  Accordingly, the present invention provides a shaft coupling that reduces the wear of each of the driving shaft side member, the driven shaft side member, and the rotational force transmission member, and enables the frequency of replacement to these new ones to be reduced. It is intended.

According to the present invention, the object as described above is achieved.
A driving shaft side member attached to the driving shaft, a driven shaft side member attached to the driven shaft, and a rotational force transmission member that transmits rotational force between them;
The driving shaft side member is formed with a pair of driving shaft side slide outer surfaces that are parallel to the driving shaft rotation center and parallel to the first direction orthogonal to the driving shaft rotation center, A pair of first slide inner surfaces corresponding to the pair of drive shaft side slide outer surfaces is formed, and a drive side bearing member is disposed between corresponding ones of the drive shaft side slide outer surface and the first slide inner surface. The driving-side bearing member includes a first surface that is in sliding contact with the outer surface of the driving shaft-side slide, and a second surface that is parallel to the first surface and in sliding contact with the inner surface of the first slide. ,
The driven shaft side member is formed with a pair of driven shaft side slide outer surfaces parallel to a second direction that is parallel to the driven shaft rotation center and orthogonal to the driven shaft rotation center, and the second direction is the first direction. The rotational force transmission member is formed with a pair of second slide inner surfaces corresponding to the pair of driven shaft side slide outer surfaces, and the driven shaft side slide outer surface and the second slide. A driven-side bearing member is disposed between corresponding ones of the inner surface, the driven-side bearing member is parallel to the third surface that is in sliding contact with the driven shaft-side slide outer surface, and the third surface. A fourth surface in sliding contact with the second slide inner surface;
The rotational force transmitting member is formed by detachably joining a driving side portion having the first slide inner surface and a driven side portion having the second slide inner surface;
Is provided.

  In one aspect of the present invention, the rotational force transmission member includes a cover portion that covers the driving shaft side member and the driven shaft side member, including a joint portion between the driving side portion and the driven side portion. Yes. In one aspect of the present invention, there is provided driving side movable range limiting means for limiting a movable range of sliding of the driving side bearing member with respect to the outer surface of the driving shaft side slide, and the driven shaft of the driven side bearing member is provided. Driven side movable range limiting means for limiting the movable range of sliding with respect to the outer surface of the side slide is provided. In one aspect of the present invention, the driving-side movable range limiting means opens on the first surface side of the driving-side bearing member and the first pin that protrudes from the driving shaft-side slide outer surface, and has a margin for the first pin. The driven-side movable range limiting means is open on the third surface side of the driven-side bearing member and the second pin protruding from the driven shaft-side slide outer surface. And a second receiving recess for receiving the pin with a margin.

  According to the shaft coupling of the present invention, the driving-side bearing members that are slidable with each other are disposed between the corresponding ones of the driving shaft-side slide outer surface and the first slide inner surface, and the driven shaft-side sliding outer surface is arranged. Between the corresponding ones of the first and second slide inner surfaces, the driven side bearing members that are slidable with each other are arranged, so that each of the driving shaft side member, the driven shaft side member, and the rotational force transmission member Wear can be significantly reduced and the frequency of replacement with these new ones can be reduced.

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

  FIG. 2 is a perspective view showing an embodiment of a shaft coupling according to the present invention, and FIG. 1 is an exploded perspective view thereof. 3 and 4 are sectional views of the shaft coupling of this embodiment.

  In these drawings, a driving shaft side member 6 attached to the driving shaft 2 by key coupling or the like and a driven shaft side member 8 attached to the driven shaft 4 by key coupling or the like are disposed to face each other. The driving shaft 2 rotates about the driving shaft rotation center 2 ', and the driven shaft 4 rotates about the driven shaft rotation center 4'. The driving shaft side member 6 and the driven shaft side member 8 are arranged such that the driving shaft rotation center 2 ′ and the driven shaft turning center 4 ′ are substantially matched to be in the Z direction.

  A rotational force transmitting member 10 that transmits rotational force between the driving shaft side member 6 and the driven shaft side member 8 includes a driving side portion 10A and a driven side portion 10B. The driving side portion 10A and the driven side portion 10B are joined so as to be detachable by bolts and nuts. The rotational force transmitting member 10 constitutes a cover portion that covers the driving shaft side member 6 and the driven shaft side member 8 including a joint portion between the driving side portion 10A and the driven side portion 10B. Accordingly, the entry of foreign matter from the outside into the shaft coupling is prevented.

  The driving shaft side member 6 has a driving shaft side slide outer surface 7A parallel to the driving shaft rotation center 2 ′ and parallel to the first direction (X direction) perpendicular to the driving shaft rotation center (ie, parallel to the XZ plane). Pairs are formed. A pair of first sliding inner surfaces 11A corresponding to a pair of driving shaft side slide outer surfaces 7A is formed on the driving side portion 10A of the rotational force transmitting member. That is, in FIG. 1, downward driving shaft side slide outer surfaces corresponding to the upward first slide inner surface 11 </ b> A are formed at both left and right ends of the driving shaft side member 6, and corresponding to the downward first slide inner surface. An upward driving shaft side slide outer surface 7 </ b> A is formed at both left and right ends of the driving shaft side member 6. A driving-side bearing member 12 is disposed between corresponding ones of the driving shaft-side slide outer surface 7A and the first slide inner surface 11A. In the present embodiment, four driving side bearing members 12 are arranged. The driving-side bearing member 12 includes a first surface 13A that is in sliding contact with the driving shaft-side slide outer surface 7A, and a second surface 13A ′ that is parallel to the first surface and that is in sliding contact with the first sliding inner surface 11A. .

  The driven shaft side member 8 has a driven shaft side slide outer surface 9B parallel to the second direction (Y direction) parallel to the driven shaft rotation center 4 ′ and perpendicular to the driven shaft rotation center (ie, parallel to the YZ plane). Pairs are formed. A pair of second slide inner surfaces 11B corresponding to the pair of driven shaft side slide outer surfaces 9B is formed in the driven side portion 10B of the rotational force transmitting member. That is, in FIG. 1, the left-side driven shaft side slide outer surface is formed on the upper and lower ends of the driven shaft-side member 8 corresponding to the right-pointing second slide inner surface 11B, and corresponding to the left-side second slide inner surface. Right-side driven shaft side slide outer surfaces 9 </ b> B are formed at both upper and lower ends of the driven shaft side member 8. A driven bearing member 14 is disposed between the corresponding ones of the driven shaft side slide outer surface 9B and the second slide inner surface 11B. In this embodiment, four driven bearing members 14 are arranged. The driven-side bearing member 14 includes a third surface 15B that is in sliding contact with the driven shaft-side slide outer surface 9B, and a fourth surface 15B ′ that is parallel to the third surface and in sliding contact with the second slide inner surface 11B. .

  The shaft coupling according to the present embodiment includes a driving-side movable range limiting unit that limits a sliding movable range of the driving-side bearing member 12 with respect to the driving shaft-side sliding outer surface 7A, and a driven-side bearing member 14 with respect to the driven shaft-side sliding outer surface 9B. And driven side movable range limiting means for limiting the movable range of sliding. The driving side movable range limiting means is a first pin 7A1 that protrudes from the driving shaft side slide outer surface 7A and a first pin 13A1 that opens on the first surface 13A side of the driving side bearing member and receives the first pin 7A1 with a margin. The receiving recess 13A1. However, the first pin may be formed on the first surface 13A side of the driving side bearing member, and the first receiving recess may be formed on the driving shaft side slide outer surface 7A side of the driving shaft side member. Similarly, the driven side movable range limiting means opens on the side of the second pin 9B1 protruding from the driven shaft side slide outer surface 9B and the third surface 15B of the driven side bearing member, and receives the second pin 9B1 with a margin. It comprises a second receiving recess 15B1 that can be accommodated. However, the second pin may be formed on the third surface 15B side of the driven bearing member, and the second receiving recess may be formed on the driven shaft side slide outer surface 9B side of the driven shaft side member.

  Therefore, the driving side bearing member 12 can move relative to the driving shaft side member 6 in a plane parallel to the XZ plane within a range regulated by the driving side movable range limiting means. In addition, the driving-side bearing member 12 can be moved relative to the rotational force transmitting member 10 in a plane parallel to the XZ plane. Based on these two relative movements, a relative movement in the plane parallel to the XZ plane between the driving shaft side member 6 and the rotational force transmitting member 10 is realized.

  Similarly, the driven bearing member 14 can be moved relative to the driven shaft side member 8 in a plane parallel to the YZ plane within a range regulated by the driven side movable range limiting means. In addition, the driven-side bearing member 14 can be moved relative to the rotational force transmitting member 10 in a plane parallel to the YZ plane. Based on these two relative movements, the relative movement in the plane parallel to the YZ plane between the driven shaft side member 8 and the rotational force transmitting member 10 is realized.

  Thus, on each of the driving shaft side and the driven shaft side, the relative movement between the driving shaft side member 6 or the driven shaft side member 8 and the rotational force transmitting member 10 is made by two-stage relative movement through the bearing member. Therefore, wear of the driving shaft side member 6, the driven shaft side member 8, and the rotational force transmission member 10 is reduced.

  The rotational force of the driving shaft 2 is transmitted through the driving shaft side member 6, the driving side bearing member 12, the driving side portion 10A and the driven side portion 10B of the rotating force transmission member, the driven side bearing member 14, and the driven shaft side member 8. It is transmitted to the driven shaft 4. At that time, even if there is an eccentricity and a declination between the driving shaft 2 and the driven shaft 4, they are absorbed by the relative movement between the members. Further, even if there is a relative movement between the driving shaft side member 6 and the driven shaft side member 8 in the directions of the rotation centers 2 ′ and 4 ′ (Z direction), this is absorbed by the relative movement between the respective members. The

  The material of the bearing members 12 and 14 on the driving side and the driven shaft side is worn by sliding rather than the portions of the driving shaft side member 6, the driven shaft side member 8, and the rotational force transmitting member 10 that are brought into sliding contact with them. Use easy-to-use items. As a result, the driving shaft side member, the driven shaft side member, and the rotational force transmission member can be made to wear only in the bearing members 12 and 14 without substantially causing wear. Accordingly, if only the bearing members 12 and 14 are worn and replaced with new ones, troublesome replacement work of the driving shaft side member, the driven shaft side member and the rotational force transmitting member to the new one is not required. In addition, the shaft coupling can be operated over a long period of time.

  Replacement of the bearing members 12 and 14 with a new one can be easily performed as follows. That is, first, the joint between the driving side portion 10A and the driven side portion 10B of the rotational force transmitting member is separated, and the driving side portion 10A and the driven side portion 10B are moved in the Z direction so as to be separated from each other. Thereby, the engagement between the first slide inner surface 11A of the driving side portion 10A and the second surface 13A ′ of the driving side bearing member is released, and the driving side bearing member 12 can be detached from the driving shaft side member 6. . Similarly, the engagement between the second slide inner surface 11B of the driven side portion 10B and the fourth surface 15B ′ of the driven bearing member is released, and the driven bearing member 14 can be detached from the driven shaft side member 8. .

  As described above, in this embodiment, the four driving side bearing members 12 and the four driven side bearing members 14 are arranged. Therefore, as shown in FIG. 5 (a), even if the driving shaft 2 and hence the driving shaft side member 6 rotate in either the clockwise direction C or the counterclockwise direction A, the torque can be transmitted satisfactorily. it can. That is, as shown in FIG. 5B, when the driving shaft side member 6 rotates in the clockwise direction C, the rotational force transmission from the driving shaft side member 6 to the rotational force transmission member 10 is substantially reduced. 5 (b), it is made only through the driving side bearing member 12 shown by hatching, and the driving shaft side member 6 is moved in the counterclockwise direction A as shown in FIG. 5 (c). In the case of rotation, the rotational force is transmitted from the driving shaft side member 8 to the rotational force transmitting member 10 substantially only through the driving side bearing member 12 shown by hatching in FIG. The When the driving shaft side member 6 rotates only in one of the clockwise direction C and the counterclockwise direction A, hatching is given to FIGS. 5B and 5C, respectively. A driving-side bearing member other than those shown may be omitted. The same applies to the driven side (however, the direction of transmission of the rotational force is reversed).

It is a disassembled perspective view which shows one Embodiment of the shaft coupling by this invention. It is a perspective view of the shaft coupling of FIG. It is sectional drawing of the shaft coupling of FIG. It is sectional drawing of the shaft coupling of FIG. It is a schematic diagram for operation | movement description of the shaft coupling of FIG.

Explanation of symbols

2 Drive shaft 2 'Drive shaft rotation center 4 Drive shaft 4' Drive shaft rotation center 6 Drive shaft side member 7A Drive shaft side slide outer surface 7A1 First pin 8 Drive shaft side member 9B Drive shaft side slide outer surface 9B1 Second pin DESCRIPTION OF SYMBOLS 10 Rotational force transmission member 10A Driving side part of rotational force transmission member 10B Driven side part of rotational force transmission member 11A First slide inner surface 11B Second slide inner surface 12 Driving side bearing member 13A First surface of driving side bearing member 13A1 First 13A 'second surface of the driving side bearing member 14 driven side bearing member 15B third surface of the driven side bearing member 15B1 second receiving concave portion 15B' fourth surface of the driven side bearing member

Claims (4)

A driving shaft side member attached to the driving shaft, a driven shaft side member attached to the driven shaft, and a rotational force transmission member that transmits rotational force between them;
The driving shaft side member is formed with a pair of driving shaft side slide outer surfaces that are parallel to the driving shaft rotation center and parallel to the first direction orthogonal to the driving shaft rotation center, A pair of first slide inner surfaces corresponding to the pair of drive shaft side slide outer surfaces is formed, and a drive side bearing member is disposed between corresponding ones of the drive shaft side slide outer surface and the first slide inner surface. The driving-side bearing member includes a first surface that is in sliding contact with the outer surface of the driving shaft-side slide, and a second surface that is parallel to the first surface and in sliding contact with the inner surface of the first slide. ,
The driven shaft side member is formed with a pair of driven shaft side slide outer surfaces parallel to a second direction that is parallel to the driven shaft rotation center and orthogonal to the driven shaft rotation center, and the second direction is the first direction. The rotational force transmission member is formed with a pair of second slide inner surfaces corresponding to the pair of driven shaft side slide outer surfaces, and the driven shaft side slide outer surface and the second slide. A driven-side bearing member is disposed between corresponding ones of the inner surface, the driven-side bearing member is parallel to the third surface that is in sliding contact with the driven shaft-side slide outer surface, and the third surface. A fourth surface in sliding contact with the second slide inner surface;
The rotational force transmission member is formed by detachably joining a driving side portion having the first slide inner surface and a driven side portion having the second slide inner surface. The rotational force transmitting member includes a joint portion between the driving side portion and the driven side portion to constitute a cover portion that covers the driving shaft side member and the driven shaft side member. Item 10. The shaft coupling according to Item 1. Driving-side movable range limiting means for limiting a sliding movable range of the driving-side bearing member with respect to the driving shaft-side slide outer surface is provided, and sliding of the driven-side bearing member with respect to the driven shaft-side sliding outer surface is movable. The shaft coupling according to claim 1, wherein driven side movable range limiting means for limiting the range is provided. The driving-side movable range limiting means has a first pin protruding from the driving shaft-side slide outer surface and a first receiving recess that opens on the first surface side of the driving-side bearing member and accepts the first pin with a margin. The driven-side movable range limiting means opens on the third surface side of the driven-side bearing member with a second pin protruding from the driven-shaft side slide outer surface, and accepts the second pin with a margin. The shaft coupling according to claim 3, comprising two receiving recesses.

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