Angle transmission coupling

Abstract

To provide an angle transmission coupling in which for X, Y and Z directions orthogonal to each other, a direction along a central axis of a rotation angle change is defined as the Z direction, and which absorbs not only displacement in the X, Y directions, but also displacement in the X, Y, Z directions including displacement in the Z direction with a simpler structure than before.SOLUTION: An angle transmission coupling 100 transmits a rotation angle change between two axes, the angle transmission coupling comprising one or more displacement absorbers 130 that can absorb displacement in X, Y and Z directions, where a direction along a central axis of the rotation angle change is defined as the Z direction for the X, Y and Z directions orthogonal to each other. The displacement absorber 130 has a first absorber 131 that can absorb displacement in the X and Z directions, and a second absorber 132 that can absorb displacement in the Y and Z directions.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an angle transmission coupling, and more particularly to a flexible angle transmission coupling that transmits a change in rotation angle between two shafts while absorbing eccentricity and vibration. [Background technology]

[0002] Various types of angle transmission couplings are used, including a disk type that uses the flexibility of a metal disk, a slit type that has slits in a metal cylinder to provide flexibility, and an Oldham type that uses the sliding of a spacer in an intermediate part. An example of this type of angle transmission coupling is described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-050197 Summary of the Invention [Problem to be solved by the invention]

[0004] The angle transmission coupling disclosed in Patent Document 1 and various other existing couplings are configured to absorb eccentricity and vibration between two shafts. Hereinafter, eccentricity and vibration will be collectively referred to as displacement.

[0005] With the X, Y, and Z directions being perpendicular to one another, and the direction along the central axis of the rotation angle change being the Z direction, couplings that absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions but also displacements in the Z direction, have the problem of making their structure complex.

[0006] For this reason, there has been a demand for a coupling that can absorb displacement in the XYZ directions, including displacement in the Z direction as well as in the XY directions, with a simpler structure than conventional couplings. The present invention has been made to solve the above-mentioned problems, and aims to provide an angle transmission coupling that can absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions but also displacements in the Z direction, with a structure simpler than conventional ones, where the X, Y, and Z directions are perpendicular to each other and the direction along the central axis of rotation angle change is defined as the Z direction. [Means for solving the problem]

[0007] The angle transmission coupling according to the present invention transmits a change in rotation angle between two axes, and is provided with one or more displacement absorbers capable of absorbing displacements in the X, Y, and Z directions, which are orthogonal to each other, when the direction along the central axis of the change in rotation angle is defined as the Z direction, and the displacement absorbers have a first absorber capable of absorbing displacements in the X and Z directions, and a second absorber capable of absorbing displacements in the Y and Z directions.

[0008] In the angle transmission coupling according to the present invention, the first absorber may be formed of an annular elastic body that can be deformed in the X direction and the Z direction, and the second absorber may be formed of an annular elastic body that can be deformed in the Y direction and the Z direction.

[0009] In the angle transmission coupling according to the present invention, the annular elastic body constituting the first absorber may have a hollow region with a central axis extending in the Y direction, and the annular elastic body constituting the second absorber may have a hollow region with a central axis extending in the X direction.

[0010] In the angle transmission coupling according to the present invention, the first absorber and the second absorber may be configured by being connected to each other in a chain shape.

[0011] The angle transmission coupling according to the present invention may further include a first mounting portion capable of mounting a first rotating body at one end of the angle transmission coupling, and a second mounting portion capable of mounting a second rotating body at the other end of the angle transmission coupling.

[0012] In the angle transmission coupling according to the present invention, a plurality of displacement absorbers may be provided in a plane including the X direction and the Y direction, and the plurality of displacement absorbers may be connected to each other by a connecting member.

[0013] In the angle transmission coupling according to the present invention, the connecting member may include a plurality of connecting pieces that connect the first absorber and the second absorber that constitute each displacement absorber, and a joining portion that joins the plurality of connecting pieces. [Effects of the Invention]

[0014] The angle transmission coupling according to the present invention transmits a change in rotation angle between two axes, and includes one or more displacement absorbers capable of absorbing displacements in the X, Y, and Z directions, where the direction along the central axis of the change in rotation angle is defined as the Z direction, and the displacement absorbers include a first absorber capable of absorbing displacements in the X and Z directions, and a second absorber capable of absorbing displacements in the Y and Z directions. This makes it possible for the angle transmission coupling to absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions, but also displacements in the Z direction, with a structure simpler than conventional angle transmission couplings. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view showing the structure of an angle transmission coupling according to Embodiment 1 in a partially transparent state. [Figure 2] 1 is a configuration diagram showing the structure of an angle transmission coupling according to the first embodiment. FIG. [Figure 3] FIG. 2 is an exploded perspective view showing the structure of the angle transmission coupling according to the first embodiment in an exploded state. [Figure 4] 1 is a perspective view showing the configuration of a main part of an angle transmission coupling according to Embodiment 1. FIG. [Figure 5] 3 is a perspective view showing the structure of a connecting member used in the angle transmission coupling according to the first embodiment. FIG. [Figure 6]FIG. 4 is a configuration diagram showing another structure of the angle transmission coupling according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the angle transmission coupling of the present invention will be described with reference to the drawings. In each drawing, the same parts are given the same reference numerals.

[0017] Embodiment 1 First, the structure of the angle transmission coupling 100 in the first embodiment will be described with reference to Figs. 1 to 5. Here, the angle transmission coupling 100 is a flexible coupling that transmits a change in the rotation angle while absorbing eccentricity and vibration between two shafts, the first rotating body 10 and the second rotating body 20. Hereinafter, eccentricity and vibration will be collectively referred to as displacement. FIG. 1 is a perspective view showing the structure of an angle transmission coupling 100 according to the first embodiment in a partially transparent state. FIG. 2 is a configuration diagram showing the structure of the angle transmission coupling 100 according to the first embodiment. FIG. 3 is an exploded perspective view showing the structure of the angle transmission coupling 100 according to the first embodiment in an exploded state. FIG. 4 is a perspective view showing the structure of the main parts of the angle transmission coupling 100 according to the first embodiment. FIG. 5 is a perspective view showing the structure of a connecting member 140 used in the angle transmission coupling 100 according to the first embodiment.

[0018] In the following description, the X, Y, and Z directions are perpendicular to each other, and the direction along the central axis of the rotation angle change is referred to as the Z direction. Here, the X direction includes the +X direction and the -X direction. The Y direction includes the +Y direction and the -Y direction. The Z direction includes the +Z direction and the -Z direction. [Structure of the angle transmission coupling 100] The angle transmission coupling 100 mainly includes a first attachment portion 110, a second attachment portion 120, a displacement absorber 130, and a connecting member 140.

[0019] The first mounting portion 110 is configured so that an external first rotating body 10 can be attached to one end of the angle transmission coupling 100. The first mounting portion 110 is provided with a screw hole 111 that is used when attaching the external first rotating body 10. A first absorber 131 of the displacement absorber 130 is attached to the surface of the first mounting portion 110 opposite to the surface where the first rotating body 10 is attached. The second mounting portion 120 is configured so that an external second rotating body 20 can be mounted to the other end of the angle transmission coupling 100. The second mounting portion 120 is provided with a screw hole 121 that is used when mounting the external second rotating body 20. A second absorber 132 of the displacement absorber 130 is mounted to the surface of the second mounting portion 120 opposite to the surface where the second rotating body 20 is mounted.

[0020] The displacement absorber 130 is configured to rigidly transmit a change in rotation angle between the first attachment portion 110 and the second attachment portion 120, and to flexibly absorb displacements in the X, Y, and Z directions. One or more displacement absorbers 130 are provided between the first attachment portion 110 and the second attachment portion 120. In the specific example shown in FIG. 1 , four displacement absorbers 130 are arranged at equal angular intervals. Each of the one or more displacement absorbers 130 is provided with a first absorber 131 and a second absorber 132.

[0021] The first absorber 131 is made of an annular elastic body so as to be deformable in the X and Z directions. Here, the annular elastic body that makes up the first absorber 131 has a hollow region with its central axis in the Y direction formed therein. Specifically, the annular elastic body that makes up the first absorber 131 is made of a circular, elliptical, or oval leaf spring or the like that has a hollow region with its central axis in the Y direction. Therefore, the first absorber 131 can absorb displacements in the X and Z directions by deforming in the X and Z directions. Note that the first absorber 131 does not deform in the Y direction and therefore has rigid properties in the Y direction.

[0022] The second absorber 132 is made of an annular elastic body so that it can deform in the Y and Z directions. Here, the annular elastic body that makes up the second absorber 132 has a hollow region with its central axis in the X direction formed therein. Specifically, the annular elastic body that makes up the second absorber 132 is made of a circular, elliptical, or oval leaf spring or the like that has a hollow region with its central axis in the X direction. Therefore, the second absorber 132 can absorb displacements in the Y and Z directions by deforming in the Y and Z directions. Note that the second absorber 132 does not deform in the X direction and therefore has rigid properties in the X direction.

[0023] The first absorber 131 and the second absorber 132 are connected to each other in a chain-like manner and configured in a fixed state. As a result, the angle transmission coupling 100 can absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions but also displacements in the Z direction, with a structure simpler than conventional structures, while maintaining a mechanically stable state of the first absorber 131, which can absorb displacements in the X and Z directions, and the second absorber 132, which can absorb displacements in the Y and Z directions. The first absorber 131 and the second absorber 132 may be connected directly, or may be connected via a connecting piece 141, as described below.

[0024] When multiple displacement absorbers 130 are provided in a plane including the X direction and the Y direction, the first absorber 131 and the second absorber 132 constituting each of the multiple displacement absorbers 130 are connected to each other by a connecting member 140. As shown in Figures 4 and 5, the connecting member 140 is composed of a plurality of connecting pieces 141 that connect the first absorber 131 and the second absorber 132 that constitute each displacement absorber 130, and a connecting portion 142 that joins the plurality of connecting pieces 141. The first absorber 131 and the second absorber 132 may be connected via the connecting piece 141 by any of adhesive, welding, or screw fastening. The connecting portion 142 may have a shape that matches the number of displacement absorbers 130 to be connected. Specifically, the connecting portion 142 may be triangular or Y-shaped when connecting three displacement absorbers 130, and may be rectangular or X-shaped when connecting four displacement absorbers 130.

[0025] The first attachment portion 110 and the second attachment portion 120 can be configured as shown in Fig. 6 in addition to the configurations shown in Fig. 1 to Fig. 3. Fig. 6 is a configuration diagram showing another structure of the angle transmission coupling 100 according to the first embodiment. 6, the first mounting portion 110 has a cylindrical portion 112. A hollow bearing portion 113 is formed in the cylindrical portion 112. The hollow bearing portion 113 is configured to be able to receive the rotating shaft of the first rotating body 10 (not shown). Similarly, the second mounting portion 120 has a cylindrical portion 122. A hollow bearing portion 123 is formed in the cylindrical portion 122. The hollow bearing portion 123 is configured to be able to receive the rotating shaft of the second rotating body 20 (not shown). The first mounting portion 110 and the second mounting portion 120 can be a combination of one having the configuration shown in Figures 1 to 3 and the other having the configuration shown in Figure 6. It is also possible to adopt a known mounting structure other than that shown here.

[0026] [Function of the Angle Transmission Coupling 100] The angle transmission coupling 100 is provided between the two shafts of the first rotating body 10 and the second rotating body 20, and its function in absorbing eccentricity and vibration between the two shafts will be described below. below, X-direction eccentricity and / or vibration, X-direction displacement, Y-direction displacement, Y-direction eccentricity and / or vibration, X and Y eccentricity and / or vibration, XY displacement, Eccentricity and / or vibration in the X and Z directions, displacement in the XZ directions, · YZ direction displacement, Y and Z direction eccentricity and / or vibration, Eccentricity and / or vibration in the X, Y, and Z directions, displacement in the X, Y, and Z directions, He says.

[0027] The absorption of the displacement is as follows: When displacement in the X direction occurs between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction and absorbs the displacement in the X direction. When displacement in the Y direction occurs between the two axes of the first rotating body 10 and the second rotating body 20, the second absorber 132 deforms in the Y direction and absorbs the displacement in the Y direction. When displacement in the X and Y directions occurs between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction to absorb the displacement in the X direction, and the second absorber 132 deforms in the Y direction to absorb the displacement in the Y direction. When displacement in the XZ directions occurs between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction to absorb the displacement in the X direction, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the displacement in the Z direction. When displacement in the YZ direction occurs between the two axes of the first rotating body 10 and the second rotating body 20, the second absorber 132 deforms in the Y direction to absorb the displacement in the Y direction, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the displacement in the Z direction. When displacement in the X, Y, and Z directions occurs between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction to absorb the displacement in the X direction, the second absorber 132 deforms in the Y direction to absorb the displacement in the Y direction, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the displacement in the Z direction.

[0028] Because the multiple displacement absorbers 130 are connected to each other by the connecting members 140, regardless of whether displacement occurs in the X, Y, or Z direction, deformation can be dispersed throughout the multiple displacement absorbers 130. In other words, the connecting members 140 act as stabilizers that suppress localized displacement absorption among the multiple displacement absorbers 130. This prevents deformation from concentrating on just one of the first absorber 131 and the second absorber 132 that make up the multiple displacement absorbers 130. Furthermore, the connecting members 140 enable the multiple displacement absorbers 130 to maintain an even more rigid state in the rotational direction.

[0029] As described above, in the angle transmission coupling 100, when the direction along the central axis of rotation angle change is defined as the Z direction, the X, Y, and Z directions are orthogonal to each other. By using the first absorber 131 capable of absorbing displacement in the XZ directions and the second absorber 132 capable of absorbing displacement in the YZ directions, it becomes possible to absorb displacement in the X, Y, and Z directions, including not only displacement in the XY directions but also displacement in the Z direction, with a simpler structure than conventional devices. Furthermore, by using the first absorber 131 capable of absorbing displacement in the XZ directions and the second absorber 132 capable of absorbing displacement in the YZ directions, the angle transmission coupling 100 becomes rigid in the rotational direction while absorbing displacement in the X, Y, and Z directions. Therefore, the angle transmission coupling 100 can absorb displacement in the X, Y, and Z directions without generating backlash in the rotational direction.

[0030] [Effects obtained by the first embodiment] The angle transmission coupling 100 of the first embodiment provides the following effects.

[0031] (a) The angle transmission coupling 100 according to the first embodiment transmits a change in a rotation angle between two axes, and includes one or more displacement absorbers 130 that can absorb displacements in the X, Y, and Z directions, where the direction along the central axis of the change in the rotation angle is defined as the Z direction, and are orthogonal to each other. Here, the displacement absorbers 130 include a first absorber 131 that can absorb displacements in the X and Z directions, and a second absorber 132 that can absorb displacements in the Y and Z directions. In this angle transmission coupling 100, when displacements in the X, Y, and Z directions occur between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction to absorb the displacement in the X direction, the second absorber 132 deforms in the Y direction to absorb the displacement in the Y direction, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the displacement in the Z direction. As a result, it is possible to absorb displacements in the XYZ directions, including displacements in the Z direction as well as in the XY directions, with a structure simpler than conventional methods, while transmitting changes in rotation angle between two axes.

[0032] (b) In the angle transmission coupling 100 of (a) above, the first absorber 131 is made of an annular elastic body that can deform in the X and Z directions, and the second absorber 132 is made of an annular elastic body that can deform in the Y and Z directions. In this angle transmission coupling 100, the annular elastic body that constitutes the first absorber 131 deforms in the X direction to absorb displacement in the X direction and deforms in the Z direction to absorb displacement in the Z direction, and the annular elastic body that constitutes the second absorber 132 deforms in the Y direction to absorb displacement in the Y direction and deforms in the Z direction to absorb displacement in the Z direction.

[0033] (c) In the angle transmission coupling 100 of (b) above, the annular elastic body constituting the first absorber 131 has a hollow region with its central axis in the Y direction, and the annular elastic body constituting the second absorber 132 has a hollow region with its central axis in the X direction. In this angle transmission coupling 100, the first absorber 131 is made of an annular elastic body in which a hollow region with its central axis in the Y direction is formed, and therefore can deform in the X and Z directions to easily absorb displacements in the X and Z directions. Furthermore, the second absorber 132 is made of an annular elastic body in which a hollow region with its central axis in the X direction is formed, and therefore can deform in the Y and Z directions to easily absorb displacements in the Y and Z directions.

[0034] (d) In the angle transmission coupling 100 described above in (a) to (c), the first absorber 131 and the second absorber 132 are connected to each other in a chain shape in the Z direction. This angle transmission coupling 100 can absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions but also displacements in the Z direction, with a structure simpler than conventional structures, while maintaining the first absorber 131, which can absorb displacements in the X and Z directions, and the second absorber 132, which can absorb displacements in the Y and Z directions, in a stable state.

[0035] (e) The angle transmission coupling 100 of any one of (a) to (d) above further includes a first attachment portion 110 to which the first rotating body 10 can be attached at one end of the angle transmission coupling 100, and a second attachment portion 120 to which the second rotating body 20 can be attached at the other end of the angle transmission coupling 100. In this angle transmission coupling 100, when displacements in the X, Y, and Z directions occur between the two axes of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction between the first attachment portion 110 and the second attachment portion 120 to absorb the displacement in the X direction, the second absorber 132 deforms in the Y direction to absorb the displacement in the Y direction, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the displacement in the Z direction. As a result, it is possible to absorb displacements in the X, Y, and Z directions, including not only displacements in the X and Y directions, but also displacements in the Z direction, with a structure simpler than conventional structures.

[0036] (f) In the angle transmission coupling 100 of any one of (a) to (e) above, a plurality of displacement absorbers 130 are provided in a plane including the X direction and the Y direction, and the plurality of displacement absorbers 130 are connected to one another by the connecting members 140. Because the plurality of displacement absorbers 130 are connected to one another by the connecting members 140, even if displacement occurs in any of the X, Y, and Z directions, deformation can be dispersed throughout the plurality of displacement absorbers 130. Therefore, deformation does not concentrate on only one of the first absorber 131 and the second absorber 132 that constitute the plurality of displacement absorbers 130, and displacement in the X, Y, and Z directions can be stably absorbed with a structure simpler than conventional structures.

[0037] (g) In the angle transmission coupling 100 of (f) above, the connecting member 140 includes a plurality of connecting pieces 141 that connect the first absorber 131 and the second absorber 132 that constitute each displacement absorber 130, and a joining portion 142 that joins the plurality of connecting pieces 141. That is, the plurality of displacement absorbers 130, each having the first absorber 131 and the second absorber 132 connected by the connecting pieces 141, are joined by the joining portions 142 that join the connecting pieces 141 to each other. As a result, the plurality of displacement absorbers 130 are joined by the connecting member 140, and the first absorber 131 and the second absorber 132 of each of the plurality of displacement absorbers 130 are maintained in a stable state, making it possible to stably absorb displacement in the X, Y, and Z directions with a structure simpler than conventional structures. Furthermore, the connecting member 140 can maintain the plurality of displacement absorbers 130 in an even more rigid state in the rotational direction.

[0038] [Other embodiments] In the above explanation, the angle transmission coupling 100 is shown to be equipped with four displacement absorbers 130. However, the angle transmission coupling 100 can be configured with at least one displacement absorber 130. Note that when the angle transmission coupling 100 is configured with one displacement absorber 130, the connecting member 140 is not necessary.

[0039] The above explanation has shown a state in which the first attachment portion 110 and the second attachment portion 120 are provided on both ends of the angle transmission coupling 100. However, it is also possible for the angle transmission coupling 100 not to be provided with the first attachment portion 110 and the second attachment portion 120, and for the first rotating body 10 to be directly attached to the first absorbing body 131, and the second rotating body 20 to be directly attached to the second absorbing body 132. [Explanation of symbols]

[0040] 10 First rotating body, 20 Second rotating body, 100 Angle transmission coupling, 110 First mounting portion, 111 Screw hole, 112 Cylinder portion, 113 Hollow bearing portion, 120 Second mounting portion, 121 Screw hole, 122 Cylinder portion, 123 Hollow bearing portion, 130 Displacement absorber, 131 First absorber, 132 Second absorber, 140 Connecting member, 141 Connection piece, 142 Joining portion.

Claims

1. An angle transmission coupling (100) for transmitting a change in rotation angle between two shafts, With respect to the X direction, Y direction, and Z direction which are orthogonal to each other, when the direction along the central axis of the rotation angle change is defined as the Z direction, one or more displacement absorbers (130) capable of absorbing displacements in the X direction, the Y direction, and the Z direction are provided; The displacement absorber (130) is a first absorber (131) capable of absorbing displacements in the X direction and the Z direction; a second absorber (132) capable of absorbing displacement in the Y direction and the Z direction; An angular transmission coupling having

2. The first absorber (131) is composed of an annular elastic body that can deform in the X direction and the Z direction, The second absorber (132) is composed of an annular elastic body that can deform in the Y direction and the Z direction. The angular transmission coupling according to claim 1 .

3. The annular elastic body constituting the first absorber (131) has a hollow region with the Y direction as its central axis, The annular elastic body constituting the second absorber (132) has a hollow region with the X direction as its central axis.

3. The angular transmission coupling according to claim 2.

4. The first absorber (131) and the second absorber (132) are connected to each other in a chain shape in the Z direction.

4. The angular transmission coupling according to claim 3.

5. a first mounting portion (110) capable of mounting a first rotating body (10) to one end of the angle transmission coupling (100); a second mounting portion (120) capable of mounting a second rotating body (20) to the other end of the angle transmission coupling (100); The angular transmission coupling of claim 1 further comprising:

6. The displacement absorber (130) is provided in a plurality of positions within a plane including the X direction and the Y direction, The plurality of displacement absorbers (130) are connected to each other by connecting members (140). The angular transmission coupling according to any one of claims 1 to 5.

7. The connecting member (140) a plurality of connecting pieces (141) that connect the first absorber (131) and the second absorber (132) that constitute each of the displacement absorbers (130); a connecting portion (142) that connects the plurality of connecting pieces (141); The angular transmission coupling according to claim 6, comprising:

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