JP2014034997A - Rotation transmitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation transmitting device simply constructed to develop sufficient performance for all of the tilt of a rotation axis, misalignment, axial deviation, and backlash.SOLUTION: A rotation transmitting device 10 having a pair of rotary members connected to each other to be rotated around the same rotation axis A includes a first member 11, an intermediate member 13, a second member 12 and an elastic plate 14 arrayed coaxially with the rotation axis A. The first member 11 and the intermediate member 13 are connected via a first turning mechanism 21 turnable around a first turn axis A1, and the second member 12 and the intermediate member 13 are connected via a second turning mechanism 22 turnable around a second turn axis A2. One rotary member is connected to the first member 11, and the other rotary member is connected to the second member 12 via the elastic plate 14. The elastic plate 14 has fixed holes 142 via which the other rotary member is connected thereto and fixed holes 148 via which the second member 12 is connected thereto, isolated a predetermined distance D from each other.

Description

  The present invention relates to a rotation transmission device, and relates to a rotation transmission device that couples two rotatable members to transmit rotation to each other, and can allow inclination, center misalignment, and shaft misalignment of each of the members to be coupled.

Conventionally, when two rotatable members are connected to transmit rotation to each other, for example, when extending the rotating shaft or connecting another rotating element to the end of the rotating shaft, various types of rotation transmission The device is being used. Such a rotation transmission device is also called a shaft coupling, a joint, or a coupling.
In such a rotation transmission device, as a basic function, it is required to transmit a rotational force and a rotation angle position between two connected rotating members. Furthermore, when applied to a high-precision rotating mechanism such as a roundness measuring machine, it is required that tilt, misalignment, and misalignment between the rotation axes can be allowed.

In the roundness measuring machine, in order to measure the roundness of the outer periphery of the workpiece with high accuracy, the rotational accuracy of the table on which the workpiece is placed is increased. In order to rotate such a table, a drive shaft for transmitting rotational force is connected.
Here, between the table side and the drive shaft, there is an inclination (declination, inclination of each rotation center axis), misalignment (eccentricity, deviation of each rotation center axis in the axis crossing direction), axis deviation (each The axial deviation of the rotation center axis of the shaft and the advance and retreat of the shaft are inevitable.
If such tilt, misalignment, and shaft misalignment are directly transmitted from the drive shaft to the table, the rotation accuracy of the table may be affected.

  Various rotation transmission devices (universal joints, flexible joints, or flexible couplings) that can alleviate or absorb the above-described inclination, misalignment, and axial misalignment have been proposed.

  Patent Document 1 is a so-called disk-type universal joint. When connecting a pair of coaxially arranged rotating shafts, rotation is transmitted by interposing a disk member orthogonal to each rotating shaft. Then, the tilt of each rotating shaft and the deviation in the axial direction are allowed using the deformation of the disk. However, since the center position of each rotating shaft is fixed with respect to the disk member, it is difficult to cope with misalignment.

  Patent Document 2 is a so-called cross joint type universal joint, and when connecting a pair of coaxially arranged rotating shafts, two connecting pins arranged orthogonally to each rotating shaft and crossing each other are connected. Intervene to transmit rotation. Then, the tilt of the rotating shaft is allowed by turning around the two pins in the intersecting direction, and the misalignment of the rotating shaft is allowed by displacing in the longitudinal direction along each pin. However, since it cannot be displaced in the direction along the rotation axis, it is difficult to cope with the axial deviation.

  Patent Document 3 is a so-called Oldham-type universal joint, in which two sets of slide structures composed of ridges and grooves extending in the crossing direction of the rotation axis are combined in the crossing direction to transmit rotation. Then, each slide structure is displaced in the longitudinal direction to allow misalignment of each rotation shaft, and each slide structure is allowed to be inclined so that the ridges and grooves are inclined, so that each rotation shaft is allowed to tilt. Furthermore, the axial deviation is allowed by the ridges and the grooves of each slide structure being displaced in the axial direction.

JP 2010-203469 A JP 2008-208952 A Utility Model Registration No. 2512843

As described above, the Oldham type rotation transmission device has sufficient tolerance for each of the inclination, misalignment, and misalignment of the rotation shaft.
However, in the Oldham type rotation transmission device, in the two sets of slide structures, mutual fitting gaps are necessary for assembling, and a predetermined gap is also necessary for performing the sliding operation.
Due to such a gap, in the Oldham type rotation transmission device, backlash occurs in the rotation transmission, and the accuracy of the rotation angle position cannot be avoided. For this reason, it is not satisfactory for all of the rotation axis inclination, misalignment, misalignment, and backlash.

  In this respect, in the disk-type rotation transmission device, since the rotation shaft is fixed to the disk member, basically no backlash occurs. However, the disk-type rotation transmission device is difficult to cope with misalignment as described above. For this reason, it is not satisfactory for all of the rotation axis inclination, misalignment, misalignment, and backlash.

  In the cross joint type rotation transmission device, although there is sliding on the two pin shafts, it is possible to eliminate the gap or prevent backlash by the elastic body or the urging means. However, as described above, it is difficult for the cross joint type rotation transmission device to cope with the shaft misalignment. For this reason, it is not satisfactory for all of the rotation axis inclination, misalignment, misalignment, and backlash.

In order to obtain satisfactory performance for all of the tilt, misalignment, misalignment, and backlash of the rotating shaft, two or more of the above-mentioned Oldham type, disk type and cross joint type rotation transmission devices are combined. It is also possible to supplement the shortcomings.
However, the combination of two or more rotation transmission devices is redundant, structurally complicated, and cannot be realistically selected due to installation space and cost problems.

  An object of the present invention is to provide a rotation transmission device that has a simple structure and can obtain sufficient performance for all of tilt, misalignment, misalignment, and backlash of a rotation shaft.

  The present invention relates to a rotation transmission device that couples a pair of rotating members that rotate about the same rotating shaft, and includes a first member, an intermediate member, a second member, and an elastic plate that are arranged coaxially with the rotating shaft. The first member and the intermediate member are connected via a first rotation mechanism that is rotatable about a first rotation axis that extends in a direction intersecting the rotation axis, and the second member and The intermediate member is connected via a second rotation mechanism that is rotatable about a second rotation shaft that extends in a direction intersecting with both the rotation shaft and the first rotation shaft, and the pair of rotations One of the members is connected to the first member, the other of the pair of rotating members is connected to the second member via the elastic plate, and the elastic plate is arranged in a direction intersecting the rotation axis, An external connection position to which the other of the pair of rotating members is connected; And a inner connection position whose serial second member is connected, the external connection position and said inner connection position, characterized in that are separated by a predetermined distance at the surface of the elastic plate.

  In the present invention as described above, the first member, the intermediate member, and the second member are separated from each other by the first rotation mechanism and the second rotation mechanism, and the first rotation shaft and the second member intersect each other. It is connected so as to be rotatable about two rotation axes, and can be displaced along the first rotation axis and the second rotation axis. Therefore, a rotation transmission device corresponding to a cross joint type is constituted by these, and a pair of rotating members are rotatably connected, and the inclination and misalignment of the rotating shaft can be allowed, and backlash can be avoided. Here, in the present invention, the elastic plate is interposed at the connection portion between the second member and the rotating member, and the external connection position and the internal connecting portion, which are the portions connecting the elastic plate and the second member and the rotating member, are provided. Since the two plates are separated from each other, when an axial misalignment occurs between the pair of rotating members, the portion between the external connection position and the internal connection site of the elastic plate is elastically deformed. Can be tolerated. At this time, since the elastic plate, the second member, and the rotating member are fixedly connected, backlash does not occur and backlash can be avoided throughout the rotation transmission device.

In the present invention, it is desirable that the external connection position and the internal connection position are divided into two regions having different radii around the rotation axis.
In the present invention, the two regions having different radii can be, for example, a combination of the outer peripheral region of the elastic plate and the central region of the elastic plate.
In the present invention, the external connection position and the internal connection position are divided into the outer peripheral side (region near the outer peripheral edge) and the inner peripheral side (region near the center) of the elastic plate, with a predetermined distance between each. Each of them can be appropriately connected to the second member and the rotating member.
By dividing the region in this way, the degree of freedom of selection of the connection structure in each region can be increased. For example, a plurality of bolt connections are arranged on the outer peripheral side, and the entire circumference of the end surface of the cylinder is arranged on the inner peripheral side. Selection such as connection can be performed freely. And even if it chooses a connection structure freely, a predetermined distance can be ensured between each area | region.
In particular, the maximum distance between the two regions is ensured while using the same elastic plate by distributing the two regions that are the external connection position and the internal connection position to the vicinity of the outer periphery and the center of the elastic plate. Can do.

In the present invention, it is preferable that the elastic plate has a polygonal outline, and one of the external connection position and the internal connection position is disposed at a vertex corresponding to the outer periphery of the polygonal shape.
In the present invention, by using a polygonal apex for connection, the maximum distance can be secured between the external connection position and the internal connection position while using the same elastic plate, and the apex of the elastic plate By doing so, since the apex portion has a shape protruding from the other portion, it is possible to obtain a large deformation performance with respect to the other portion including the central region.

In the present invention, the first rotation mechanism and the second rotation mechanism are mounted on a cylindrical pin serving as a rotation shaft, a cylindrical hole into which the pin is inserted, and an outer periphery of the pin. It is desirable to have an elastic sleeve that presses against the outer periphery of the pin and the inner periphery of the hole.
In the present invention as described above, the gap between the first rotation mechanism and the second rotation mechanism can be eliminated by the elastic sleeve, and the occurrence of backlash in the first rotation mechanism and the second rotation mechanism is avoided. Can do.

In the present invention, it is desirable that the elastic sleeve has at least one of a ball that rolls on the outer periphery of the pin and a ball that rolls on the inner periphery of the hole.
In the present invention, the gap between the first rotation mechanism and the second rotation mechanism can be eliminated, and the rotation operation in the first rotation mechanism and the second rotation mechanism can be made smooth.

The perspective view which looked at the 1st Embodiment of the present invention from the 2nd member side. The perspective view which looked at the 1st embodiment from the 1st member side. The perspective view which fractured | ruptured partially which shows the internal structure of the said 1st Embodiment. The disassembled perspective view which shows the components structure of the said 1st Embodiment. The perspective view which looked at 2nd Embodiment of this invention from the 2nd member side. The top view which shows the elastic plate of 3rd Embodiment of this invention. The top view which shows the elastic plate of 4th Embodiment of this invention. The top view which shows the elastic plate of 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 4 show a first embodiment of the present invention.
As shown in FIGS. 1 and 2, the rotation transmission device 10 of the present embodiment connects a pair of rotating members 1 and 2 that rotate about the same rotation axis A to each other.

In the present embodiment, the rotating member 1 is a columnar general shaft member, and the rotating member 2 is a plate-like member in a direction intersecting the rotation axis A.
Examples of the rotating members 1 and 2 include a loading table of a roundness measuring machine and a drive shaft that rotationally drives the table.
The pair of rotating members 1 and 2 may be a rotation transmission part of another measuring machine or a rotation transmission part of an apparatus other than the measuring machine, and the angular position accuracy is required while transmitting a predetermined torque. A pair of rotating members corresponds to the rotating members 1 and 2.

As shown in FIGS. 3 and 4, the rotation transmission device 10 includes a first member 11, an intermediate member 13, a second member 12, an elastic plate 14, which are arranged coaxially with the rotation axis A of the rotating members 1 and 2. It has a connection ring 15.
The first member 11 and the intermediate member 13 are connected via a first rotation mechanism 21 that is rotatable around a first rotation axis A1 that extends in a direction intersecting the rotation axis A.
The second member 12 and the intermediate member 13 are connected via a second rotation mechanism 22 that can rotate about a second rotation axis A2 that extends in a direction that intersects both the rotation axis A and the first rotation axis A1. Connected.

The first member 11 has a cylindrical main body 110, and a central hole 119 is formed at the center of the main body 110.
The main body 110 has a notch 111 formed from a side surface thereof to an end surface on the intermediate member 13 side. A connection member 112 is disposed in the notch 111 and is fixed to the main body 110 by a cap bolt 113.

In the first member 11, a pair of notches 111 and connecting members 112 are disposed opposite to each other on the peripheral surface of the main body 110.
The intermediate member 13 side of the connecting member 112 protrudes from the end surface of the main body 110 on the intermediate member 13 side, and a through hole 114 is formed in this portion.
A rotation pin 131 and an elastic sleeve 210, which will be described later, are inserted into the through hole 114, whereby the first rotation mechanism 21 is formed.

The second member 12 uses the same member as the first member 11 and is arranged in the reverse direction. The main body 110, the notch 111, the connection member 112, the cap bolt 113, the through hole in the first member 11 are arranged. 114, the same main body 120 as the center hole 119, a notch 121, a connecting member 122, a cap bolt 123, a through hole 124, and a center hole 129.
A rotation pin 131 and an elastic sleeve 220 of the intermediate member 13 to be described later are inserted into the through hole 124, thereby forming the second rotation mechanism 22.

The intermediate member 13 has a square block-shaped main body 130, and a central hole 139 having the same diameter as the above-described central holes 119 and 129 is formed at the center of the main body 130.
Rotating pins 131 are fixed to the four side surfaces of the main body 130, respectively.
An elastic sleeve 220 is attached to a pair on the opposite side of the four rotation pins 131 and is inserted into the through hole 114 of the first member 11 to form the first rotation mechanism 21.
Further, an elastic sleeve 220 is attached to the other pair, and is inserted into the through hole 124 of the second member 12 to form the second rotation mechanism 22.

In the first rotation mechanism 21 and the second rotation mechanism 22, a plurality of rolling balls 221 are rotatably held by the elastic sleeve 220. Among them, some of the rolling balls 221 roll on the outer peripheral surface of the rotation pin 131, and the other rolling balls 221 roll on the inner peripheral surfaces of the through holes 114 and 124.
Thus, smooth sliding is obtained between the outer peripheral surface of the rotating pin 131 and the inner peripheral surfaces of the through holes 114 and 124, and the outer peripheral surface of the rotating pin 131 and the inner peripheral surfaces of the through holes 114 and 124. The gap between the surfaces is eliminated, and the occurrence of backlash is suppressed.

  With the first rotation mechanism 21 and the second rotation mechanism 22, the first member 11 and the intermediate member 13 can be rotated around the first rotation axis A <b> 1 by the first rotation mechanism 21. It is movably connected along the rotation axis A1. Further, the second member 12 and the intermediate member 13 are connected by the second rotation mechanism 22 so as to be rotatable around the second rotation axis A2 and movable along the second rotation axis A2.

In the present embodiment, the rotating member 1 is inserted and fixed in a center hole 119 formed in the main body 110 of the first member 11, thereby connecting the rotating member 1 and the first member 11.
On the other hand, the rotating member 2 is connected to the second member 12 via the elastic plate 14 and the connection ring 15.

The elastic plate 14 is a plate material having elasticity, and is arranged in a direction intersecting the rotation axis A. The outer peripheral shape thereof is a triangle as a whole, but the three vertices 141 are formed flat with corners removed. .
A center hole 149 having the same diameter as the above-described center holes 119, 129, and 139 is formed at the center of the elastic plate 14.
The elastic plate 14 is formed with a fixing hole 142 in the vicinity of the vertex 141. A fixing hole 148 is also formed around the center hole 149.
The elastic plate 14 is fixed to the end surface of the second member 12 by a cap bolt 147 inserted through a fixing hole 148 near the center hole 149.
The elastic plate 14 is fixed to the surface of the connection ring 15 on the second member 12 side by a cap bolt 143 inserted through the fixing hole 142 near the vertex 141.

The connection ring 15 is an annular member having a rectangular cross section, and has an outer diameter slightly larger than the outer diameter at the apex 141 of the elastic plate 14 (see FIG. 2).
In the connection ring 15, a fixing hole 151 is formed in the middle of each cap bolt 143, and the rotating member 2 is fixed to the surface on the rotating member 2 side by a cap bolt 152 inserted through the fixing hole 151.

Connection between the elastic plate 14 and the connection ring 15 connected to the rotating member 2 is made by a fixing hole 142 in the vicinity of the apex 141.
The fixing holes 142 are arranged in a region having a radius R1 with respect to the center of the elastic plate 14 (the center of the center hole 149 through which the rotation axis A passes).
Therefore, the area of the radius R <b> 1 where the fixing hole 142 is formed is an external connection position connected to the rotating member 2.

The elastic plate 14 and the second member 12 are connected by a fixing hole 148 near the center hole 149. The fixing holes 148 are arranged in a region having a radius R2 with respect to the center of the elastic plate 14 (the center of the center hole 149 through which the rotation axis A passes).
Therefore, the region of the radius R <b> 2 in which the fixing hole 148 is formed is an internal connection position that continues to the second member 12 in the rotation transmission device 10.

In the present embodiment, the angular positions of the fixing holes 142 and 148 with respect to the center of the elastic plate 14 are the same, and therefore the ones having the same angular position are closest to each other. For this reason, the distance between the fixing holes 142 and 148 is the difference between the radii R1 and R2, and the distance D = R1−R2 between the internal connection position and the external connection position.
In the elastic plate 14 of the present embodiment, the distance D is set so that the elastic plate 14 is deformed in a wave shape to absorb the axial deviation with respect to the axial deviation between the second member 12 and the rotating member 2. Is done.

In this embodiment, the following effects can be obtained.
In the rotation transmission device 10 of the present embodiment, each of the first member 11, the intermediate member 13, and the second member 12 intersects the rotation axis A by the first rotation mechanism 21 and the second rotation mechanism 22 and mutually The first rotation axis A1 and the second rotation axis A2 that intersect each other are pivotally connected to each other, and can be displaced along the first rotation axis A1 and the second rotation axis A2.
Therefore, the rotation transmission device 10 is configured to include a rotation transmission mechanism corresponding to a cross joint type, and while rotatably connecting the pair of rotation members 1 and 2, the rotation axis A can be tilted and misaligned, Backlash can be avoided.

On the other hand, in the rotation transmission device 10 of the embodiment, the elastic plate 14 is interposed at the connection portion between the second member 12 and the rotating member 2. Then, an external connection position for connecting the elastic plate 14 and the rotating member 2 (region of radius R1 where the fixing hole 142 is installed) and an internal connection site for connecting the elastic plate 14 and the second member 12 (fixing hole 148). Are separated from each other by a distance D.
For this reason, when an axial shift in the direction of the rotation axis A occurs between the pair of rotating members 1 and 2, the portion between the external connection position and the internal connection portion of the elastic plate 14 is elastically deformed. Axis deviation can be allowed.
At this time, since the elastic plate 14 and the second member 12 and the rotating member 2 are fastened and fixed by the cap bolts 143, 147, and 152, backlash does not occur, and the back of the rotation transmitting device 10 is prevented throughout. Rush can be avoided.

  Further, in the present embodiment, since the rotating member 2 and the elastic plate 14 are connected via the connection ring 15, the connection work can be facilitated while simplifying the structure when connecting to the plate-like rotating member 2. Can be done.

In the present embodiment, an external connection position (region of radius R1 where the fixed hole 142 is installed) and an internal connection position (region of radius R2 where the fixed hole 148 is installed) are set to have a radius around the rotation axis A. Was divided into two different areas.
Thus, the external connection position and the internal connection position can be reliably divided into the outer peripheral side (region near the outer peripheral edge) and the inner peripheral side (region near the center) of the elastic plate 14. By connecting the second member 12 and the rotating member 2, the predetermined distance D = R1-R2 can be reliably obtained.
In this way, by dividing the region into two parts, that is, the external connection position and the internal connection position, the degree of freedom in selecting the connection structure for the second member 12 and the rotating member 2 in each region can be increased. For example, it is possible to freely select a plurality of bolt connections on the outer peripheral side and connect the entire circumference of the end face of the cylinder on the inner peripheral side. And even if it selects freely the connection structure with respect to the 2nd member 12 and the rotation member 2, the predetermined distance D can be ensured between each area | region.

  In particular, in the present embodiment, the external connection position is disposed in the vicinity of the vertex 141 that is the outer peripheral area of the elastic plate 14, and the internal connection position is disposed in the vicinity of the center hole 149 that is the central area of the elastic plate 14, The two regions described above can be distributed near the center and the outer periphery of the elastic plate 14, and the maximum distance D can be secured between both regions while using the same elastic plate 14.

  In the present embodiment, the elastic plate 14 has a triangular outline with a vertex cut off, and a fixing hole 142 serving as an external connection position is disposed in the vicinity of the vertex 141. For this reason, the maximum distance can be secured between the external connection position and the internal connection position while using the same elastic plate 14. Further, by making the fixing hole 142 in the vicinity of the vertex 141 of the elastic plate 14, the vertex 141 portion has a shape protruding from the other portion, so that the deformation performance with respect to other portions including the central region can be increased. it can.

[Second Embodiment]
FIG. 5 shows a second embodiment of the present invention.
The rotation transmission device 10A of the present embodiment has the same configuration as the rotation transmission device 10 of the first embodiment described above. For this reason, the same code | symbol is attached | subjected about the structure common to each embodiment, while the overlapping description is abbreviate | omitted, and a different part is demonstrated below.

In the rotation transmission device 10 (see FIGS. 1 to 4) of the first embodiment described above, an annular connection ring 15 is used to connect to the flat plate-like rotation member 2.
On the other hand, in the rotation transmission device 10A (see FIG. 5) of the present embodiment, a disk-shaped connection plate 16 is used together with the connection ring 15 in order to connect to the cylindrical shaft-shaped rotation member 2A.

In FIG. 5, the rotating member 1, the first member 11, the intermediate member 13, the second member 12, the elastic plate 14, and the connection ring 15 are the same as those in the first embodiment described above.
The connection plate 16 is a disk-shaped plate material having the same outer diameter as the connection ring 15, and the rigidity as the plate material is set sufficiently larger than that of the elastic plate 14. However, the connection plate 16 may absorb the axial deviation as rigidity of the elastic plate 14.

The rotating member 2 </ b> A is connected to the center of the connection plate 16.
The rotating member 2 </ b> A of the present embodiment is a columnar general shaft member similar to the rotating member 1, and the rotating members 1 and 2 </ b> A can rotate coaxially along the rotating axis A.
The connection plate 16 and the rotating member 2A are connected by inserting cap bolts 162 into the through holes 161 formed in the connecting plate 16 from the connecting ring 15 side, and connecting the respective shaft portions to the female screw holes formed on the end surface of the rotating member 2A. This is done by screwing and tightening.

The connection plate 16 is fixed to the surface of the connection ring 15 on the rotating member 2A side by screwing a nut 153 into a cap bolt 152 inserted through the connection ring 15 in the vicinity of the outer periphery thereof.
The cap bolts 148 (see FIG. 4) and 162 facing the inside of the connection ring 15 are surrounded by the elastic plate 14, the connection ring 15, and the connection plate 16 in the assembled state. After the connection between the elastic plate 14 and the second member 12 and the connection between the connection plate 16 and the rotating member 2A using the cap bolt 162, the connection ring 15 and the connection plate 16 are connected using the cap bolt 152 and the nut 153. It is desirable that the elastic plate 14 and the connection ring 15 be connected by the cap bolt 143 (see FIG. 4).

According to the present embodiment as described above, it is possible to obtain the same effects as those described for the rotation transmission device 10 of the first embodiment described above.
Furthermore, in the rotation transmission device 10A, the rotating member 1 and the rotating member 2A, which are cylindrical shaft members, can be connected to each other, and the present invention can be applied to a general connecting portion between shaft members. .

[Third Embodiment]
FIG. 6 shows a third embodiment of the present invention.
This embodiment uses a different elastic plate 14A with respect to the configuration of the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above.
The remaining configuration except for the elastic plate 14A is the same as the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above. For this reason, the same code | symbol is attached | subjected about the structure common to each embodiment, while the overlapping description is abbreviate | omitted, and a different part is demonstrated below.

In the elastic plate 14 (see FIG. 4) of the first embodiment or the second embodiment described above, the fixing hole 142 serving as the external connection position is formed in the area of the radius R1 in the vicinity of the three apexes 141, and the vicinity of the center hole 149 is formed. A fixing hole 148 serving as an internal connection position is formed in the area of the radius R2, and the angular positions of the fixing hole 142 and the fixing hole 148 with respect to the rotation axis A are the same.
In the present embodiment, the basic configuration of the elastic plate 14A is the same as that of the first embodiment, and the fixing holes 142 and the fixing holes 148 are also arranged at three positions at intervals of 120 degrees. However, in the present embodiment, the angular positions of the fixed hole 142 and the fixed hole 148 with respect to the rotation axis A are set so as to be shifted from each other by 60 degrees (see FIG. 6).

  In this embodiment, the distance between the fixed hole 142 and the fixed hole 148, that is, the predetermined distance D between the external connection position and the internal connection position is set to the radii R1 and R2 of the two regions where each is installed. The predetermined distance D is larger than the difference, that is, the predetermined distance D> R1-R2, and even if the elastic plate 14A has the same size, the predetermined distance D can be increased, and the adjustment range of deformation performance as the elastic plate 14A can be increased. Can be bigger.

[Fourth Embodiment]
FIG. 7 shows a fourth embodiment of the present invention.
This embodiment uses a different elastic plate 14B with respect to the configuration of the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above.
The remaining configuration except for the elastic plate 14B is the same as the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above. For this reason, the same code | symbol is attached | subjected about the structure common to each embodiment, while the overlapping description is abbreviate | omitted, and a different part is demonstrated below.

In the first embodiment, the second embodiment, or the third embodiment described above, the elastic plate 14 (see FIG. 4) having a substantially triangular plane shape is used. However, in this embodiment, the elastic plate 14B having a square planar shape is used. (See FIG. 7).
The elastic plate 14 </ b> B has a fixing hole 142 in the vicinity of each apex 141 and a fixing hole 148 in the vicinity of the center hole 149. However, in the present embodiment, there are four fixing holes 142 (90 degree intervals), whereas there are three fixing holes 148 (120 degree intervals).

Also in this embodiment, the distance between the fixed hole 142 and the fixed hole 148, that is, the predetermined distance D between the external connection position and the internal connection position is set to at least two regions as in the above-described embodiments. The difference between the radii R1 and R2, that is, the predetermined distance D = R1−R2.
In addition, each effect demonstrated in 1st Embodiment can be acquired similarly.
As described above, in the present invention, the planar shape of the elastic plate 14 and the like may be appropriately selected, and the arrangement of the external connection position and the internal connection position (arrangement of the fixing hole 142 and the fixing hole 148) on the elastic plate 14 and the like can be freely performed. Can be designed.

[Fifth Embodiment]
FIG. 8 shows a fifth embodiment of the present invention.
This embodiment uses a different elastic plate 14C with respect to the configuration of the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above.
The remaining configuration except for the elastic plate 14C is the same as the rotation transmission device 10 of the first embodiment or the rotation transmission device 10A of the second embodiment described above. For this reason, the same code | symbol is attached | subjected about the structure common to each embodiment, while the overlapping description is abbreviate | omitted, and a different part is demonstrated below.

In the first embodiment, the second embodiment, or the third embodiment described above, the elastic plate 14 having a substantially triangular planar shape (see FIG. 4) is used. However, in this embodiment, the planar shape is substantially circular and surrounding. An elastic plate 14C (see FIG. 8) with a cut is used.
The elastic plate 14 </ b> C has eight protruding portions extending in the radial direction by making eight triangular cuts in the periphery, and fixed holes 142 and fixed holes 148 are alternately formed near the tip thereof. .

In the present embodiment, the fixed holes 142 and 148 are offset from each other by 45 degrees, but the same fixed holes 142 and four fixed holes 148 are arranged at intervals of 90 degrees. Yes.
The four fixing holes 142 serve as external connection positions, and are connected to the connection ring 15 (see FIG. 4) as in the first embodiment.
The four fixing holes 148 serve as internal connection positions, and are connected to the second member 12 (see FIG. 4) as in the first embodiment. In addition, since the distance from the center of the four fixing holes 148 is larger than the outer shape of the second member 12, the connecting member and the like are appropriately supplemented.

In this embodiment, the fixing hole 142 serving as the external connection position and the fixing hole 148 serving as the internal connection position are arranged in the same radius region. Even in such an arrangement, if a predetermined distance is ensured between the fixed hole 142 and the fixed hole 148, the portion can be deformed to allow an axial deviation.
In particular, in the present embodiment, the projecting portions are formed by the notches, and the fixing holes 142 and the fixing holes 148 are arranged in the projecting portions. Therefore, the deformation transmission path between the two can be made substantially longer, A sufficient predetermined distance D ′ can be ensured.

[Modification]
The present invention is not limited to the above-described embodiments, and modifications and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the elastic plate 14 or the like, a reinforcing plate or rib is formed along the surface, the rigidity is increased by processing the uneven shape, or the rigidity is reduced by forming an opening or a thin part. Alternatively, the plate material may be selected, the number of stacked layers may be adjusted, and the elasticity is appropriately adjusted according to the displacement amount of the allowable axial deviation, the rotational torque to be transmitted, the dimensions of the device, etc. Is desirable.

  In the first to fourth embodiments, the fixing holes 142 installed on the outer periphery are used as external connection positions connected to the rotating members 2 and 2A, and the fixing holes 148 installed on the inner periphery are used as internal connection positions. Although used, these may be reversed. Moreover, not only fastening and fixing using the fixing holes 142 and 148 and the cap bolts 143 and 147, but also bonding, welding, and other fixing means may be employed.

  In each of the embodiments, the first member 11, the second member 12, the intermediate member 13, and the elastic plate 14 are formed with the center holes 119, 129, 139, and 149, respectively, but may be omitted as appropriate. Although it is necessary to connect the rotating member 1 to the first member 11, for example, a cylindrical connecting collar may be fixed to the first member 11, and the rotating member 1 may be inserted and fixed to the collar.

In each of the embodiments described above, in the first member 11 and the second member 12, the notches 111 and 121 are formed in the main bodies 110 and 120 and the connection members 112 and 122 are attached, but the connection members 112 and 122 and the main body 110 are attached. , 120 may be integrated.
In each of the above embodiments, the first rotation mechanism 21 and the second rotation mechanism 22 are not limited to the configuration in which the rolling balls 211 and 221 are held by the retainers such as the elastic sleeves 210 and 220, but may have other structures. Good. For example, even if an elastic sleeve or the like formed of an elastic material and provided with self-lubricating property on at least one of the inner surface and the outer surface is used, the gap can be suppressed and backlash can be avoided.

1, 2, 2A ... rotating member 10, 10A ... rotation transmission device 11 ... first member 12 ... second member 110, 120 ... main body 111, 121 ... notch 112, 122 ... connecting member 113, 123 ... cap bolt 114 , 124 through-holes 119, 129 central hole 13 intermediate member 130 body 131 rotating pin 139 central holes 14, 14A, 14B, 14C elastic plate 141 vertex 142 fixing hole 143 serving as an external fixing position , 147 ... Cap bolt 148 ... Fixing hole 149 serving as an internal fixing position ... Center hole 15 ... Connection ring 151 ... Fixing hole 152 ... Cap bolt 153 ... Nut 16 ... Connection plate 161 ... Through hole 162 ... Cap bolt 21 ... 1st time Movement mechanism 22 ... second rotation mechanism 210,220 ... elastic sleeve 211,221 ... rolling ball etc. A ... rotation axis A1 ... first Rotation axis A2 ... second turning axis D ... distance R1 ... radius R2 ... radius

Claims (5)

A rotation transmission device that couples a pair of rotating members that rotate about the same rotation axis,
A first member, an intermediate member, a second member and an elastic plate arranged coaxially with the rotation axis;
The first member and the intermediate member are connected via a first rotation mechanism that is rotatable around a first rotation axis that extends in a direction intersecting the rotation axis,
The second member and the intermediate member are connected via a second rotating mechanism that can rotate around a second rotating shaft that extends in a direction that intersects both the rotating shaft and the first rotating shaft. ,
One of the pair of rotating members is connected to the first member,
The other of the pair of rotating members is connected to the second member via the elastic plate,
The elastic plate is disposed in a direction crossing the rotation axis, and has an external connection position to which the other of the pair of rotation members is connected, and an internal connection position to which the second member is connected,
The rotation transmission device, wherein the external connection position and the internal connection position are separated by a predetermined distance on the surface of the elastic plate. In the rotation transmission device according to claim 1,
The rotation transmission device, wherein the external connection position and the internal connection position are divided into two regions having different radii around the rotation axis. In the rotation transmission device according to claim 2,
The rotation transmitting device according to claim 1, wherein the elastic plate has a polygonal shape, and one of the external connection position and the internal connection position is arranged at a vertex corresponding to an outer periphery of the polygonal shape. In the rotation transmission device according to any one of claims 1 to 3,
The first rotation mechanism and the second rotation mechanism include a columnar pin serving as a rotation shaft, a cylindrical hole into which the pin is inserted, and an outer periphery of the pin that is attached to the outer periphery of the pin. A rotation transmission device comprising an elastic sleeve pressed against the inner periphery of the hole. In the rotation transmission device according to claim 4,
The rotation transmission device, wherein the elastic sleeve has at least one of a ball that rolls on the outer periphery of the pin and a ball that rolls on the inner periphery of the hole.

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