JP2010038170A - Flexible shaft-coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible shaft-coupling which can be easily reduced in size and the number of parts, and which facilitates assembling work and replacement work of a relay member. <P>SOLUTION: The relay member 6 comprises a leaf spring, and is equipped with a body part 61, motive power side arm parts 62, 63, and driven side arm parts 64, 65. The plane orientation of the body part 61 is along rotational centers 2a, 4a of a motive power shaft and a driven shaft, the motive power side arm parts 62, 63 are axisymmetrically disposed with respect to the rotational center 2a, the driven side arm parts 64, 65 are axisymmetrically disposed with respect to the rotational center 4a, and the plane orientation of the motive power side arm parts 62, 63 and that of the driven side arm parts 64, 65 are orthogonal with each other. A motive power side mounting member 3 is equipped with a pair of motive power side slide supporting parts 32 for supporting the motive power side arm parts 62, 63 slidably in the direction of the rotational center 2a. A driven side mounting member 5 is equipped with a pair of driven side slide supporting parts 52, 53 for supporting the driven side arm parts 64, 65 slidably in the direction of the rotational center 4a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flexible shaft coupling.

  When connecting the end of the driving-side rotating shaft (driving shaft) and the end of the driven-side rotating shaft (driven shaft), the relative relationship within an appropriate range between the driving shaft end and the driven shaft end In order to transmit rotational force while allowing movement, for example, shaft misalignment (eccentricity), shaft inclination (deflection angle), rotation, and shaft end-to-end distance variation, a flexible shaft coupling is used.

  As the flexible shaft coupling, generally, a coupling side hub made of a flexible material such as a spring is connected to a driving side hub attached to the driving shaft end and a driven side hub attached to the driven shaft end. in use.

  For example, in Japanese Patent Laid-Open No. 2000-249159 (Patent Document 1), one end is connected to the other end of a plurality of arc-shaped first leaf springs connected at one end to a first hub body and the second hub body. In addition, there is shown a flexible shaft coupling in which a plurality of arc-shaped second leaf springs fastened with bolts to function as relay members.

Japanese Patent Application Laid-Open No. 2004-11655 (Patent Document 2) discloses the other end of a plurality of arcuate first blades (first leaf springs) connected at one end to a first hub body, and a second hub body. A flexible shaft coupling is shown in which a plurality of arc-shaped second blades (second leaf springs) having one end connected to the other end are fastened with bolts to function as a relay member.
JP 2000-249159 A JP 2004-11655 A

  By the way, in the flexible shaft joint of patent document 1, the 1st leaf | plate spring and the 2nd leaf | plate spring are arrange | positioned along the surface orthogonal to an axial direction, an outer diameter dimension becomes large and a viewpoint of size reduction of a flexible shaft joint. Is disadvantageous. In the flexible shaft joint of Patent Document 2, the first blade and the second blade are disposed along the outer peripheral surface, so that the outer diameter can be reduced as compared with that of Patent Document 1.

  However, in these flexible shaft couplings of Patent Documents 1 and 2, since the first leaf spring or the first blade and the second leaf spring or the second blade are fastened by bolts, the number of parts increases, and the assembly work In addition, there is a problem that the replacement work of the relay member is troublesome.

  In view of the technical problems as described above, the present invention provides a flexible shaft coupling that is easy to downsize, easily reduces the number of parts, and further facilitates assembly work and relay member replacement work. It is the purpose.

According to the present invention, the object as described above is achieved.
A driving-side mounting member attached to the end of the driving shaft, a driven-side mounting member attached to the end of the driven shaft, and a relay member that transmits rotational force from the driving-side mounting member to the driven-side mounting member. Including
The relay member is made of a leaf spring, and has a main part, a pair of driving side arm parts extending from the main part toward the driving side mounting member, and one extending from the main body part toward the driven side mounting member. With a pair of driven arms,
The plane orientation of the main body is along the rotation center of the driving shaft and the rotation center of the driven shaft, and the pair of driving-side arm portions are positioned symmetrically with respect to the driving shaft rotation center so as to face each other. The pair of driven arm portions are arranged in axially symmetrical positions with respect to the driven shaft rotation center so as to face each other, and the plane orientation of the pair of driving side arm portions and the one pair Are perpendicular to the surface orientation of the driven arm of
The driving-side mounting member includes a pair of driving-side slide support portions that are formed at axially symmetric positions with respect to the driving shaft rotation center and support the driving-side arm portion so as to be slidable in the direction of the driving shaft rotation center. And
The driven-side mounting member includes a pair of driven-side slide support portions that are formed at axially symmetric positions with respect to the driven shaft rotation center and support the driven-side arm portion so as to be slidable in the direction of the driven shaft rotation center. Yes,
Flexible shaft coupling, characterized by
Is provided.

  In one aspect of the present invention, the driving-side arm portion and the driven-side arm portion of the relay member each have a flat plate shape. In one aspect of the present invention, the relay member has a bent portion interposed between the main body portion and each of the driving side arm portion and the driven side arm portion. In one aspect of the present invention, the driving-side slide support portion and the driven-side slide support portion include dovetail grooves formed on the outer peripheral surfaces of the driving-side mounting member and the driven-side mounting member, respectively.

  According to the present invention, it is possible to provide a flexible shaft coupling that can be easily reduced in size, easily reduced in the number of parts, and further facilitates assembly work and relay member replacement work.

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

  FIG. 1 is a schematic exploded perspective view showing an embodiment of a flexible shaft joint according to the present invention, FIG. 2 is a schematic perspective view showing an assembled state of the flexible shaft joint of this embodiment, and FIG. 3 is a schematic view thereof. FIG.

  An end portion of the driving shaft 2 that is an output rotation shaft of the driving device and an end portion of the driven shaft 4 that is an input rotation shaft of the driven device are disposed to face each other. The rotation center of the driving shaft 2 is 2a, and the rotation center of the driven shaft 4 is 4a. Ideally, the rotation centers 2a and 4a are coaxial with each other, but there may be axial misalignment (eccentricity) and axial inclination (declination angle). Moreover, although the distance between the front-end | tip part of the driving shaft 2 and the front-end | tip part of the driven shaft 4 is made into a required value, it may shift | deviate from it.

  A driving shaft keyway extending in the direction of the driving shaft 2 is formed on the outer peripheral surface of the end portion of the driving shaft 2. The drive shaft keyway is formed to a required length from the end of the drive shaft along the rotation center 2a, and is formed to have a required width and depth. Similarly, a driven shaft keyway extending in the direction of the driven shaft 4 is formed on the outer peripheral surface of the end portion of the driven shaft 4. The driven shaft keyway is formed to a required length from the end of the driven shaft along the rotation center 4a, and is formed to a required width and depth.

  In FIGS. 1 and 2, the driving shaft 2 and the driven shaft 4 are not shown.

  An annular driving side mounting member 3 is attached to the outer peripheral surface of the end portion of the driving shaft 2 by a single key connection, and an annular driven side mounting member 5 is attached to the outer peripheral surface of the end portion of the driven shaft 4 by a single key connection. It has been. That is, one driving shaft keyway formed on the outer peripheral surface of the end portion of the driving shaft 2 and extending in the direction of the driving shaft 2 and 1 formed on the inner peripheral surface of the driving side mounting member 3 and extending in the direction of the driving shaft 2. The driving side key 3K is fitted to the two driving side mounting member key grooves 31. Similarly, one driven shaft key groove formed on the outer peripheral surface of the end portion of the driven shaft 4 and extending in the direction of the driven shaft 4 The driven-side key 5K is adapted to one driven-side mounting member key groove 51 formed on the inner peripheral surface of the driven-side mounting member 5 and extending in the direction of the driven shaft 4. A screw 7 is screwed into a screw hole formed in the driving side mounting member 3 and abutted against the driving side key 3K, thereby preventing the movement of the driving side mounting member 3 relative to the driving shaft 2 in the axial direction. Similarly, a screw 9 is screwed into a screw hole formed in the driven-side mounting member 5 and abutted against the driven-side key 5K, thereby preventing the axial movement of the driven-side mounting member 5 with respect to the driven shaft 4.

  The distance between the front end portion of the driving side mounting member 3 and the front end portion of the driven side mounting member 5 facing each other is substantially the same as the distance between the front end portion of the driving shaft 2 and the front end portion of the driven shaft 4. . Thereby, it is possible to efficiently transmit the rotational force while maintaining the distance between the tip portion of the driving shaft 2 and the tip portion of the driven shaft 4 to a minimum.

  In order to transmit the rotational force from the driving side mounting member 3 to the driven side mounting member 5, a relay member 6 is disposed therebetween. The relay member 6 is made of a leaf spring. However, this leaf spring has a shape and structure as described below.

  That is, the relay member 6 has a main body portion 61 and a pair of driving side arm portions 62 and 63 extending from the main body portion toward the driving side mounting member 3 and a pair extending from the main body portion 61 toward the driven side mounting member 5. The driven side arm portions 64 and 65 are provided. The surface orientation (that is, the direction of the surface normal) of the main body 61 is along the driving shaft rotation center 2a and the driven shaft rotation center 4a (that is, approximately the directions of the rotation centers 2a and 4a). The pair of driving side arm portions 62 and 63 are arranged at axially symmetrical positions with respect to the driving shaft rotation center 2a so as to face each other, and the pair of driven side arm portions 64 and 65 are moved so as to face each other. It is arranged at an axially symmetric position with respect to the shaft rotation center 4a. The plane orientations of the driving side arm portions 62 and 63 and the plane orientations of the driven side arm portions 64 and 65 are orthogonal to each other.

  FIG. 4 shows a developed plan view of the relay member 6. The relay member 6 can be manufactured by bending four arm portions of a flat plate-like cross-shaped plate spring. That is, with respect to the main part 61 corresponding to the center of the cross shape, the bent side 62 ′, 63 ′ is bent into a curved surface in the first direction (for example, the direction toward the back side in FIG. 4), and the driving side Arm portions 62 and 63 are formed, and bent arm portions 64 and 65 are formed by bending in a second direction (for example, a direction toward the front side in FIG. 4) at curved portions 64 ′ and 65 ′, respectively. can do. The presence of the bent portions 62 ′, 63 ′, 64 ′, 65 ′ increases the durability of the relay member 6 during bending deformation.

  The driving-side arm portions 62 and 63 and the driven-side arm portions 64 and 65 of the relay member 6 each have a flat plate shape with an appropriate width. The driving-side arm portions 62 and 63 and the driven-side arm portions 64 and 65 can be formed in the same size and are therefore compatible.

  The driving side mounting member 3 includes a pair of driving side slide support portions 32 and 33 formed at positions symmetrical with respect to the driving shaft rotation center 2a. The pair of driving side slide support portions 32, 33 is formed by a dovetail groove formed on the outer peripheral surface of the driving side mounting member 3, and the driving side arm portions 62, 63 of the relay member are directed in the direction of the driving shaft rotation center 2a. It is slidably supported.

  Similarly, the driven-side attachment member 5 includes a pair of driven-side slide support portions 52 and 53 that are formed at axially symmetric positions with respect to the driven shaft rotation center 4a. The pair of driven-side slide support portions 52 and 53 are formed with dovetail grooves formed on the outer peripheral surface of the driven-side mounting member 5, and the driven-side arm portions 64 and 65 of the relay member are directed in the direction of the driven shaft rotation center 4a. It is slidably supported.

  When the driving side mounting member 3 rotates around the rotation center 2 a as the driving shaft 2 rotates, the rotational force is transmitted to the driven side mounting member 5 and further to the driven shaft 4 via the relay member 6.

  When the eccentricity and declination occur between the driving shaft rotation center 2a and the driven shaft rotation center 4a, and when the driving shaft rotation center 2a between the driving side mounting member 3 and the driven side mounting member 5 When relative rotation around the driven shaft rotation center 4a occurs, the main body portion 61 of the relay member 6, the pair of driving side arm portions 62, 63, and the pair of driven side arm portions 64, 65. This can be dealt with based on the bending deformation. Further, when the distance between the distal end portion of the driving side mounting member 3 and the distal end portion of the driven side mounting member 5 changes, the pair of driving side arm portions 62 and 63 of the relay member 6 and the pair of driven portions Driving shaft rotation center 2a between the pair of driving side slide support portions 32, 33 of the side arm portions 64, 65 and the driving side mounting member 3 and the pair of driven side slide support portions 52, 53 of the driven side mounting member 5. And can be dealt with based on the relative slide along the driven shaft rotation center 4a.

  As described above, according to the present invention, the distance between the end of the driving shaft 2 and the end of the driven shaft 4 is not increased, and the radial dimension is not increased. is there. Moreover, since the relay member 6 consists of a single leaf | plate spring, a number of parts is reduced to the minimum. Further, the assembly of the joint and the replacement of the relay member 6 are performed by inserting / removing the driving side arm portions 62, 63 and the driven side arm portions 64, 65 with respect to the driving side slide support portions 32, 33 and the driven side slide support portions 52, 53. Since it can be performed only by doing, work is easy.

  In the above embodiment, the driving side slide support portions 32 and 33 and the driven side slide support portions 52 and 53 are formed of grooves, but in the present invention, the driving side slide support portion and the driven side slide support portion are respectively relay members. As long as it can support the driving | running | working side arm part and driven side arm part so that a slide with a suitable stroke is possible, it may consist of a through-hole, a blind hole, etc.

It is a typical exploded perspective view showing one embodiment of a flexible shaft coupling by the present invention. It is a typical perspective view which shows the assembly state of the flexible shaft coupling of FIG. It is a typical fragmentary sectional view which shows the assembly state of the flexible shaft coupling of FIG. It is an expansion | deployment top view of the relay member of the flexible shaft coupling of FIG.

Explanation of symbols

2 Driving shaft 2a Driving shaft rotation center 3 Driving side mounting member 3K Driving side key 31 Driving side mounting member key groove 32, 33 Driving side slide support section 4 Driven shaft 4a Driven shaft rotation center 5 Driven side mounting member 5K Driven side key 51 Drive side mounting member keyway 52, 53 Drive side slide support part 6 Relay member 61 Main part 62, 63 Drive side arm part 62 ', 63' Bending part 64, 65 Drive side arm part 64 ', 65' Bending part 7, 9 Screw

Claims (4)

A driving-side mounting member attached to the end of the driving shaft, a driven-side mounting member attached to the end of the driven shaft, and a relay member that transmits rotational force from the driving-side mounting member to the driven-side mounting member. Including
The relay member is made of a leaf spring, and has a main body, a pair of driving-side arm portions extending from the main body toward the driving-side mounting member, and 1 extending from the main body toward the driven-side mounting member. With a pair of driven arms,
The surface orientation of the main body is along the rotation center of the driving shaft and the rotation center of the driven shaft, and the pair of driving side arm portions are in an axially symmetric position with respect to the driving shaft rotation center so as to face each other. The pair of driven side arm portions are arranged at positions symmetrical with respect to the rotation axis of the driven shaft so as to face each other, and the plane orientation of the pair of driven side arm portions and the one pair of the driven side arm portions are arranged. Are perpendicular to the surface orientation of the driven arm of
The driving-side mounting member includes a pair of driving-side slide support portions that are formed at axially symmetrical positions with respect to the driving shaft rotation center and support the driving-side arm portion so as to be slidable in the direction of the driving shaft rotation center. And
The driven-side mounting member includes a pair of driven-side slide support portions that are formed at axially symmetric positions with respect to the driven shaft rotation center and support the driven side arm portion so as to be slidable in the direction of the driven shaft rotation center. Yes,
A flexible shaft coupling characterized by that.   The flexible shaft coupling according to claim 1, wherein the driving side arm portion and the driven side arm portion of the relay member each have a flat plate shape.   The said relay member has a bending part interposed between the said main-body part and each of a driving | running | working side arm part and a driven side arm part, The bending as described in any one of Claim 1 and 2 characterized by the above-mentioned. Shaft coupling.   4. The driving side slide support part and the driven side slide support part are each formed by a dovetail groove formed on the outer peripheral surface of the driving side mounting member and the driven side mounting member, respectively. The flexible shaft coupling according to one item.

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