Angle transmission coupling

Abstract

The present invention provides an angle transmission coupling that absorbs displacement in the X, Y and Z directions, including not only displacement in the X and Y directions but also displacement in the Z direction, by using a simpler structure than in the prior art, with the Z direction being the direction along the center axis of a rotation angle change. An angle transmission coupling (100) that transmits a change in rotation angle between two axes is provided with one or more displacement absorbers (130) that, with respect to an X-direction, a Y-direction, and a Z-direction that are orthogonal to each other, change in rotation angle between the X-direction, the Y-direction, and the Z-direction, causes a displacement of the displacement absorbers (130) to change in rotation angle between the X-direction, the Y-direction, and the Z-direction, and causes the displacement of the displacement absorbers (130) to change in rotation angle between the X-direction, the Y-direction, and the Z-direction. A displacement absorber (130) capable of absorbing displacement in the X direction, the Y direction, and the Z direction is provided with: a first absorber (131) capable of absorbing displacement in the X direction and the Z direction; and a second absorber (132) capable of absorbing displacement in the Y direction and the Z direction.

Description

Technical Field

[0001] This invention relates to angle transmission couplings, and more particularly to flexible angle transmission couplings that absorb eccentricity and vibration between two shafts while transmitting changes in rotational angle. Background Technology

[0002] As angle transmission couplings, various types of couplings are used, such as disc-type couplings that utilize a flexible metal disc, slit-type couplings that have slits opened in a metal cylinder to provide flexibility, and crosshead-type couplings that utilize sliding spacers in the middle. Patent Document 1 describes an example of such an angle transmission coupling.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-050197

[0006] The angle transmission coupling disclosed in Patent Document 1, along with various existing couplings, is configured to absorb eccentricity and vibration between two shafts. Hereinafter, eccentricity and vibration will be collectively referred to as displacement.

[0007] For mutually orthogonal X, Y, and Z directions, the direction along the central axis where the rotation angle changes is defined as the Z direction. Couplings that absorb displacements in the XYZ directions, including not only XY but also Z direction displacements, have a problem of increased structural complexity.

[0008] Therefore, it is desirable to have a coupling that can absorb displacements in the XYZ direction, including not only the XY direction but also the Z direction, through a simpler construction than before. Summary of the Invention

[0009] The present invention was made to solve the problems mentioned above, and its purpose is to provide an angle transmission coupling that, for mutually orthogonal X, Y and Z directions, sets the direction along the central axis of the rotation angle change as the Z direction, and can absorb displacement in the XYZ direction, including not only displacement in the XY direction but also displacement in the Z direction, through a simpler construction than before.

[0010] The angle transmission coupling of the present invention is a coupling that transmits rotational angle changes between two shafts. It includes one or more displacement absorbers. When the direction along the central axis of the rotational angle change is set as the Z direction for mutually orthogonal X, Y, and Z directions, the displacement absorber can absorb displacements in the X, Y, and Z directions. The displacement absorber has: a first absorber that can absorb displacements in the X and Z directions; and a second absorber that can absorb displacements in the Y and Z directions.

[0011] In the angle transmission coupling of the present invention, the first absorber may be composed of an annular elastic body that can deform in the X and Z directions, and the second absorber may be composed of an annular elastic body that can deform in the Y and Z directions.

[0012] In the angle transmission coupling of the present invention, a hollow region with the Y direction as the central axis may be formed on the annular elastomer constituting the first absorber, and a hollow region with the X direction as the central axis may be formed on the annular elastomer constituting the second absorber.

[0013] In the angle transmission coupling of the present invention, the first absorber and the second absorber may also be connected to each other in a chain-like manner.

[0014] In the angle transmission coupling of the present invention, it may also include: a first assembly part that can assemble a first rotating body at one end of the angle transmission coupling; and a second assembly part that can assemble a second rotating body at the other end of the angle transmission coupling.

[0015] In the angle transmission coupling of the present invention, multiple displacement absorbers may be provided in a plane including the X and Y directions, and the multiple displacement absorbers may be coupled to each other through connecting structural members.

[0016] In the angle transmission coupling of the present invention, the connecting component may be composed of multiple connecting pieces and a coupling part, wherein the multiple connecting pieces connect a first absorber and a second absorber that constitute each displacement absorber; and the coupling part couples the multiple connecting pieces.

[0017] Invention Effects

[0018] The angle transmission coupling of the present invention is a coupling that transmits rotational angle changes between two shafts. It includes one or more displacement absorbers. These displacement absorbers, when the direction along the central axis of the rotational angle change is set to the Z direction for mutually orthogonal X, Y, and Z directions, can absorb displacements in the X, Y, and Z directions. The displacement absorbers are configured with 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. Therefore, the angle transmission coupling can absorb displacements in the XYZ directions, including not only XY directions but also Z direction displacements, with a simpler construction than before. Attached Figure Description

[0019] Figure 1 This is a perspective view showing the structure of the angle transmission coupling in Embodiment 1 in a partial perspective state.

[0020] Figure 2This is a configuration diagram showing the structure of the angle transmission coupling in Embodiment 1.

[0021] Figure 3 This is an exploded perspective view of the structure of the transmission coupling in embodiment 1, representing the structure in an exploded state.

[0022] Figure 4 This is a perspective view showing the structure of the main parts of the angle transmission coupling in Embodiment 1.

[0023] Figure 5 This is a perspective view showing the structure of the connecting component used in the angle transmission coupling of Embodiment 1.

[0024] Figure 6 This is a configuration diagram showing other structures of the angle transmission coupling in Embodiment 1.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10: First rotating body; 20: Second rotating body; 100: Angle transmission coupling; 110: First assembly part; 111: Threaded hole; 112: Cylindrical part; 113: Hollow bearing part; 120: Second assembly part; 121: Threaded hole; 122: Cylindrical part; 123: Hollow bearing part; 130: Displacement absorber; 131: First absorber; 132: Second absorber; 140: Connecting component; 141: Connecting piece; 142: Coupling part. Detailed Implementation

[0027] Hereinafter, embodiments of the angle transmission coupling of the present invention will be described using the accompanying drawings. It should be noted that in each drawing, the same reference numerals are used to label the same parts.

[0028] Implementation method 1.

[0029] First, use Figures 1-5 The structure of the angle transmission coupling 100 in Embodiment 1 will be described. Here, the angle transmission coupling 100 is a flexible coupling that absorbs eccentricity and vibration while transmitting changes in rotational angle between the two shafts of the first rotating body 10 and the second rotating body 20. Hereinafter, eccentricity and vibration will be collectively referred to as displacement.

[0030] Figure 1 This is a perspective view showing the structure of the angle transmission coupling 100 in Embodiment 1 in a partial perspective state. Figure 2 This is a configuration diagram showing the structure of the angle transmission coupling 100 in Embodiment 1.

[0031] Figure 3 This is an exploded perspective view showing the structure of the angle transmission coupling 100 in embodiment 1 in a decomposed state. Figure 4This is a perspective view showing the configuration of the main parts of the angle transmission coupling 100 in Embodiment 1. Figure 5 This is a perspective view showing the structure of the connecting member 140 used in the angle transmission coupling 100 of Embodiment 1.

[0032] In the following description, for the mutually orthogonal X, Y, and Z directions, the direction along the central axis of the rotation angle change is defined as the Z direction. Here, the X direction includes the +X and -X directions. The Y direction includes the +Y and -Y directions. The Z direction includes the +Z and -Z directions.

[0033] [Construction of angle transmission coupling 100]

[0034] The angle transmission coupling 100 mainly includes: a first assembly part 110, a second assembly part 120, a displacement absorber 130, and a connecting component 140.

[0035] The first assembly part 110 is configured to assemble an external first rotating body 10 at one end of the angle transmission coupling 100. The first assembly part 110 is provided with a threaded hole 111 for assembling the external first rotating body 10. On the first assembly part 110, a first absorber 131 of the displacement absorber 130 is assembled on the surface opposite to the surface on which the first rotating body 10 is assembled.

[0036] The second assembly part 120 is configured to assemble an external second rotating body 20 at the other end of the angle transmission coupling 100. The second assembly part 120 is provided with a threaded hole 121 for assembling the external second rotating body 20. On the second assembly part 120, a second absorber 132 of the displacement absorber 130 is assembled on the surface opposite to the surface on which the second rotating body 20 is assembled.

[0037] The displacement absorber 130 is configured to rigidly transmit rotational angle changes between the first assembly portion 110 and the second assembly portion 120, and flexibly absorb displacements in the X, Y, and Z directions. One or more displacement absorbers 130 are provided between the first assembly portion 110 and the second assembly portion 120. Figure 1 In the specific example shown, four displacement absorbers 130 are arranged at equal angular intervals. Each of the more than one displacement absorber 130 is provided with a first absorber 131 and a second absorber 132.

[0038] The first absorber 131 is constructed from a ring-shaped elastic body that can deform in both the X and Z directions. Here, a hollow region with the Y direction as its central axis is formed on the ring-shaped elastic body constituting the first absorber 131. Specifically, the ring-shaped elastic body constituting the first absorber 131 is constructed from a leaf spring, which is circular, elliptical, or oblong in shape and has a hollow region with the Y direction as its central axis. Therefore, the first absorber 131 can absorb displacement in the X and Z directions by deforming in both directions. It should be noted that the first absorber 131 does not deform in the Y direction, and therefore possesses rigidity in the Y direction.

[0039] The second absorber 132 is constructed from a ring-shaped elastic body that can deform in both the Y and Z directions. Here, a hollow region with the X direction as its central axis is formed on the ring-shaped elastic body constituting the second absorber 132. Specifically, the ring-shaped elastic body constituting the second absorber 132 is constructed from a circular, elliptical, or oblong leaf spring, etc., having a hollow region with the X direction as its central axis. Therefore, the second absorber 132 can absorb displacement in the Y and Z directions by deforming in both directions. It should be noted that the second absorber 132 does not deform in the X direction, and therefore possesses rigidity in the X direction.

[0040] The first absorber 131 and the second absorber 132 are configured to be chain-connected and fixed to each other. As a result, the angle transmission coupling 100 maintains the mechanical stability of the first absorber 131, which absorbs displacement in the X and Z directions, and the second absorber 132, which absorbs displacement in the Y and Z directions, and can absorb displacement in the XYZ directions, including not only XY directions, but also Z directions, through a simpler construction than before. The first absorber 131 and the second absorber 132 can be directly connected, but can also be connected via a connecting piece 141, as described later.

[0041] When multiple displacement absorbers 130 are provided in a plane including the X and Y directions, the first absorber 131 and the second absorber 132 constituting each of the multiple displacement absorbers 130 are coupled to each other through the connecting member 140.

[0042] like Figure 4 and Figure 5 As shown, the connecting component 140 is composed of multiple connecting pieces 141 and coupling parts 142, wherein the multiple connecting pieces 141 connect the first absorber 131 and the second absorber 132 constituting each displacement absorber 130, and the coupling parts 142 couple the multiple connecting pieces 141.

[0043] The connection between the first absorber 131 and the second absorber 132 via the connecting piece 141 can be achieved through bonding, welding, or threaded fastening. The coupling portion 142 can have a shape consistent with the number of displacement absorbers 130 to be coupled. Specifically, the coupling portion 142 can be triangular or Y-shaped when coupling three displacement absorbers 130, and quadrilateral or X-shaped when coupling four displacement absorbers 130.

[0044] The first assembly section 110 and the second assembly section 120, except Figures 1-3 In addition to what is shown, it can also be as follows: Figure 6 That kind of composition. Figure 6 This is a configuration diagram showing other structures of the angle transmission coupling 100 in Embodiment 1.

[0045] exist Figure 6 In the first assembly portion 110, there is a cylindrical portion 112. A hollow bearing portion 113 is formed in the cylindrical portion 112. The hollow bearing portion 113 is configured to accommodate a rotating shaft of a first rotating body 10 (not shown). Similarly, the second assembly 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 accommodate a rotating shaft of a second rotating body 20 (not shown).

[0046] The first assembly part 110 and the second assembly part 120 can be configured as follows: one of the first assembly part 110 and the second assembly part 120 is... Figures 1-3 The configuration shown is, on the other hand, Figure 6 The configuration shown is correct. Alternatively, known assembly configurations other than those shown may also be used.

[0047] [Function of angle transmission coupling 100]

[0048] The following explains the function of the angle transmission coupling 100 when it is placed between the two shafts of the first rotating body 10 and the second rotating body 20 to absorb the eccentricity and vibration between the two shafts.

[0049] the following,

[0050] • Eccentricity and / or vibration in the X direction is referred to as displacement in the X direction.

[0051] • Eccentricity and / or vibration in the Y direction is referred to as displacement in the Y direction.

[0052] • The eccentricity and / or vibration in the X and Y directions are referred to as displacement in the XY directions.

[0053] • The eccentricity and / or vibration in the X and Z directions are referred to as displacement in the XZ direction.

[0054] • The eccentricity and / or vibration in the Y and Z directions are referred to as displacement in the YZ direction.

[0055] • The eccentricity and / or vibration in the X, Y, and Z directions are referred to as displacements in the XYZ directions.

[0056] The absorption of displacement is as follows.

[0057] When a 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.

[0058] When a 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.

[0059] When a displacement in the XY 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 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.

[0060] When a displacement in the XZ 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 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.

[0061] When a 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.

[0062] When displacement in the XYZ 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.

[0063] Since the multiple displacement absorbers 130 are coupled together by the connecting member 140, deformation can be dispersed across the multiple displacement absorbers 130 as a whole, regardless of whether a displacement occurs in the X, Y, or Z direction. That is, the connecting member 140 functions as a stabilizer to suppress localized displacement absorption among the multiple displacement absorbers 130. Therefore, deformation will not be concentrated only on one of the first absorber 131 and the second absorber 132 constituting the multiple displacement absorbers 130. Furthermore, the multiple displacement absorbers 130 can be further maintained in a rigid state in the rotational direction by the connecting member 140.

[0064] As described above, in the angle transmission coupling 100, for the mutually orthogonal X, Y, and Z directions, when the direction along the central axis of the rotation angle change is set as the Z direction, by using a first absorber 131 capable of absorbing displacement in the XZ direction and a second absorber 132 capable of absorbing displacement in the YZ direction, displacement in the XYZ direction, including not only XY direction displacement, can be absorbed with a simpler construction than before. Furthermore, by using the first absorber 131 capable of absorbing displacement in the XZ direction and the second absorber 132 capable of absorbing displacement in the YZ direction, the angle transmission coupling 100 achieves a rigid state in the rotational direction while absorbing displacement in the XYZ direction. Therefore, the angle transmission coupling 100 can absorb displacement in the XYZ direction without backlash in the rotational direction.

[0065] [Effects obtained through implementation method 1]

[0066] According to the angle transmission coupling 100 of embodiment 1, the following effect can be obtained.

[0067] (a) The angle transmission coupling 100 of Embodiment 1 is a coupling that transmits rotational angle changes between two shafts. It includes one or more displacement absorbers 130, which can absorb displacements in the XYZ directions when the direction along the central axis of the rotational angle change is set as the Z direction for mutually orthogonal X, Y, and Z directions. Here, the displacement absorber 130 has: 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 XYZ displacements occur between the two shafts of the first rotating body 10 and the second rotating body 20, the first absorber 131 deforms in the X direction to absorb the X-direction displacement, the second absorber 132 deforms in the Y direction to absorb the Y-direction displacement, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the Z-direction displacement. As a result, it is possible to absorb displacements in the XYZ directions, including not only the XY directions but also the Z direction, through a simpler construction than before, while also transmitting rotational angle changes between the two axes.

[0068] (b) In the angle transmission coupling 100 described in (a) above, the first absorber 131 is composed of an annular elastic body capable of deforming in the X and Z directions, and the second absorber 132 is composed of an annular elastic body capable of deforming in the Y and Z directions. In this angle transmission coupling 100, the annular elastic body constituting the first absorber 131 can deform in the X direction to absorb displacement in the X direction and can deform in the Z direction to absorb displacement in the Z direction; the annular elastic body constituting the second absorber 132 can deform in the Y direction to absorb displacement in the Y direction and can deform in the Z direction to absorb displacement in the Z direction.

[0069] (c) In the angle transmission coupling 100 described in (b) above, a hollow region with the Y-direction as the central axis is formed on the annular elastic body constituting the first absorber 131, and a hollow region with the X-direction as the central axis is formed on the annular elastic body constituting the second absorber 132. In this angle transmission coupling 100, since the first absorber 131 is composed of an annular elastic body with a hollow region with the Y-direction as the central axis, it can deform in the X and Z directions to easily absorb displacements in the X and Z directions. Furthermore, since the second absorber 132 is composed of an annular elastic body with a hollow region with the X-direction as the central axis, it can deform in the Y and Z directions to easily absorb displacements in the Y and Z directions.

[0070] (d) In the angle transmission coupling 100 described in (a) to (c) above, the first absorber 131 and the second absorber 132 are connected to each other in a chain-like manner in the Z direction. This angle transmission coupling 100 can keep the first absorber 131, which can absorb displacement in the X and Z directions, and the second absorber 132, which can absorb displacement in the Y and Z directions, in a stable state, and can absorb displacement in the XYZ direction, including displacement in the XY direction, through a simpler construction than before.

[0071] (e) Any of the angle transmission couplings 100 described in (a) to (d) above further comprises: a first assembly portion 110 for assembling a first rotating body 10 at one end of the angle transmission coupling 100; and a second assembly portion 120 for assembling a second rotating body 20 at the other end of the angle transmission coupling 100. In this angle transmission coupling 100, when displacement in the XYZ directions occurs between the two shafts of the first rotating body 10 and the second rotating body 20, between the first assembly portion 110 and the second assembly portion 120, a first absorber 131 deforms in the X direction to absorb the X-direction displacement, a second absorber 132 deforms in the Y direction to absorb the Y-direction displacement, and at least one of the first absorber 131 and the second absorber 132 deforms in the Z direction to absorb the Z-direction displacement. As a result, displacement in the XYZ directions, including not only XY directions but also Z-direction displacement, can be absorbed with a simpler construction than before.

[0072] (f) In any of the angle transmission couplings 100 described in (a) to (e) above, multiple displacement absorbers 130 are provided in a plane including the X and Y directions, and the multiple displacement absorbers 130 are coupled to each other through connecting members 140. Since the multiple displacement absorbers 130 are coupled to each other through connecting members 140, regardless of whether a displacement occurs in the X, Y, or Z directions, the deformation can be dispersed throughout the multiple displacement absorbers 130. Therefore, the deformation will not be concentrated only in one of the first absorber 131 and the second absorber 132 constituting the multiple displacement absorbers 130, and displacement in the X, Y, and Z directions can be stably absorbed with a simpler construction than before.

[0073] (g) In the angle transmission coupling 100 described in (f) above, the connecting member 140 is configured with a plurality of connecting pieces 141 and a coupling portion 142. The plurality of connecting pieces 141 connect the first absorber 131 and the second absorber 132 constituting each displacement absorber 130, and the coupling portion 142 couples the plurality of connecting pieces 141. That is, the plurality of displacement absorbers 130, which are connected by the connecting pieces 141 to the first absorber 131 and the second absorber 132, are coupled by the coupling portion 142 that couples the connecting pieces 141 to each other. Thus, the plurality of displacement absorbers 130 are coupled by the connecting member 140, and the first absorber 131 and the second absorber 132 of each of the plurality of displacement absorbers 130 remain in a stable state, thereby enabling stable absorption of displacement in the XYZ directions with a simpler construction than before. Furthermore, the connecting member 140 can further maintain the plurality of displacement absorbers 130 in a rigid state in the rotational direction.

[0074] [Other Implementation Methods]

[0075] The above description shows that the angle transmission coupling 100 includes four displacement absorbers 130. In contrast, the angle transmission coupling 100 can be constructed with at least one displacement absorber 130. It should be noted that when the angle transmission coupling 100 is constructed with only one displacement absorber 130, the connecting member 140 is not required.

[0076] The above description shows the angle transmission coupling 100 with a first assembly portion 110 and a second assembly portion 120 at both ends. Alternatively, the angle transmission coupling 100 may not have the first assembly portion 110 and the second assembly portion 120; instead, the first rotating body 10 may be directly assembled to the first absorber 131, and the second rotating body 20 may be directly assembled to the second absorber 132.

Claims

1. An angle transmission coupling (100) for transmitting rotational angle changes between two shafts, characterized in that, have: One or more displacement absorbers (130) can absorb displacements in the X, Y, and Z directions when the direction along the central axis of the rotation angle is taken as the Z direction, which are mutually orthogonal to each other. The displacement absorber (130) has: The first absorber (131) is capable of absorbing displacements in the X and Z directions; and The second absorber (132) can absorb displacement in the Y direction and the Z direction.

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

3. The angle transmission coupling according to claim 2, characterized in that, A hollow region with the Y direction as the central axis is formed on the annular elastomer constituting the first absorber (131). A hollow region is formed on the annular elastomer constituting the second absorber (132) with the X direction as the central axis.

4. The angle transmission coupling according to claim 3, characterized in that, The first absorber (131) and the second absorber (132) are connected to each other in a chain-like manner in the Z direction.

5. The angle transmission coupling according to claim 1, characterized in that, It also has: The first assembly part (110) is capable of assembling a first rotating body (10) at one end of the angle transmission coupling (100); and The second assembly part (120) can assemble a second rotating body (20) at the other end of the angle transmission coupling (100).

6. The angle transmission coupling according to any one of claims 1 to 5, characterized in that, The displacement absorber (130) is provided in a plurality of such absorbers in a plane including the X direction and the Y direction. The multiple displacement absorbers (130) are coupled to each other through connecting members (140).

7. The angle transmission coupling according to claim 6, characterized in that, The connecting component (140) comprises multiple connecting pieces (141) and coupling parts (142), wherein, The plurality of connecting pieces (141) connect the first absorber (131) and the second absorber (132) constituting each of the displacement absorbers (130). The coupling part (142) couples the plurality of connecting pieces (141).

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