JP2016148346A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a large amount of bending when connecting an input-side shaft and an output-side shaft.SOLUTION: A joint 1 comprises a plurality of spring units 2 connected along an axial center. Each of the spring units 2 comprises spring elements 3 and 4. Each of the spring elements 3 and 4 comprises a board part 31 or 41 and a plurality of leg parts 32 or 42 inclined from the board part 31 or 41 and protruded radially. Two of the spring units 2 and 2 adjacent along the axial center are connected by mutually connecting the plurality of leg parts 32 and 42 of the spring elements 3 and 4.SELECTED DRAWING: Figure 8

Description

  The disclosed embodiment relates to a joint and a rotating electrical machine.

  Patent Document 1 describes a coupling in which a first plate spring and a second plate spring are connected via an intermediate member between a motor shaft mounting flange and a detector shaft mounting flange.

JP 2000-320566 A

  However, in the one described in Patent Document 1, the amount of bending (direction change of rotational torque) obtained when the deviation of the direction between the input side shaft (motor shaft) and the output side shaft (detector shaft) is allowed. (Angle) was small.

  The present invention has been made in view of such problems, and provides a joint capable of obtaining a large amount of bending when connecting an input side shaft and an output side shaft, and a rotating electrical machine using the joint. The purpose is to do.

  In order to solve the above-described problem, according to one aspect of the present invention, there is provided a joint having a plurality of spring units connected along an axis, each spring unit having a plurality of spring elements, and each spring. The element includes a base plate portion and a plurality of leg portions that are inclined from the base plate portion and project in the radial direction, and the two spring units adjacent to each other along the axial center include the spring elements of each other. The joint which is connected by applying the plurality of leg portions to each other is applied.

  According to the present invention, a large amount of bending can be obtained when the input side shaft and the output side shaft are connected by the joint.

It is a side view showing the joint of a 1st embodiment. It is the perspective view which looked at the coupling from the input side. It is a partial side view showing the detail of the input side part of a coupling. It is the front view of a spring unit, and the cross-sectional view by the BB cross section in Fig.4 (a). It is a perspective view showing a spring unit. It is the front view of the 1st spring element which comprises a spring unit, the front view of a 2nd spring element, and the cross-sectional view by the AA cross section in FIG.6 (b). It is a disassembled longitudinal cross-sectional view showing the whole structure of the coupling which connected two spring units. It is a longitudinal cross-sectional view showing the whole structure of the coupling which connected two spring units. It is a perspective view showing the state where the joint bent. It is a schematic diagram showing the wind power generation system by 2nd Embodiment. It is a schematic diagram showing the wind power generation system by 3rd Embodiment.

<First Embodiment>
The joint according to the first embodiment will be described with reference to FIGS.

<Overview of the entire joint>
First, the outline of the entire joint will be described with reference to FIGS. 1 to 3.

  As shown in FIGS. 1 to 3, the joint 1 according to the present embodiment includes a plurality of (for example, 30) spring units 2 (details) connected along the axial direction (the left-right direction in FIGS. 1 and 3). And a boss 5 on the input side (left side in FIG. 1, corresponding to one side in the axial direction), and a boss 6 on the output side (right side in FIG. 1, corresponding to the other side in the axial direction). . The plurality of connected spring units 2 are attached between the input-side boss 5 and the output-side boss 6.

  The boss 5 on the input side and the boss 6 on the output side are hollow cylindrical bodies in this example. For example, a rotation shaft (not shown) on the drive source side is attached to the boss 5 on the input side. After the rotational axis on the drive source side is inserted into the hollow portion 5a (see FIG. 2) of the boss 5 shown in FIG. 2 from one side in the axial direction (left side in FIG. 1, left front side in FIG. 2). The fixing bolt is screwed into the screw hole 8 of the boss 5 to be fixed to the boss 5. For example, a driven-side rotation shaft (not shown) is attached to the output-side boss 6. Similarly to the above, the driven rotation shaft is inserted into the hollow portion (not shown) of the boss 6 from the other side in the axial direction (the right side in FIG. 1 and the right back side in FIG. 2). The fixing bolt is screwed into the screw hole 9 of the boss 6 so that the boss 6 is fixed.

<Spring unit>
As described above, in the joint 1, a plurality of spring units 2 (corresponding to first spring units) are connected along the axial direction. As shown in FIG. 4A, FIG. 4B, and FIG. 5, the spring unit 2 includes a combination of a first spring element 3 and a second spring element 4 that function as leaf springs, respectively. . The detailed structures of the first spring element 3 and the second spring element 4 are shown in FIGS.

<Details of each spring element>
As shown in FIGS. 6B and 6C, the second spring element 4 includes an annular substrate portion 41 having a through hole 44 in the central portion in the radial direction, and the substrate portion from the periphery of the substrate portion 41. A plurality of (six in this example) leg portions 42 (corresponding to means for elastically relieving external force to the means for imparting rigidity) that protrude in the radial direction while being inclined with respect to the surface direction of 41. ing.

  The board portion 41 is provided with bolt insertion holes 45 for fastening the board at a phase that is equidistant (60 ° in this example) along the circumferential direction. The substrate portion 41 corresponds to a means for giving rigidity in the second spring element 4.

  As shown in FIG. 6B, the six leg portions 42 have a phase (corresponding to the second phase) different from that of the bolt insertion hole 45 (in this example, the phase of 30 ° is 30 ° along the circumferential direction). They are arranged at regular intervals (60 ° intervals) along the circumferential direction. In other words, the bolt insertion holes 45 are respectively provided at intermediate positions between the two leg portions 42 and 42 adjacent to each other along the circumferential direction. As shown in FIG. 6C, each leg portion 42 has a predetermined angle (for example, about 17 to 22) with respect to the substrate portion 41 on the front side in FIG. 6B (left side in FIG. 6C). The tip portion 43 is bent so as to be parallel to the substrate portion 41 after being bent so as to be inclined at a specific angle within a range of °. In addition, a bolt insertion hole 46 for connecting the spring unit is provided at the distal end portion 43. In addition, since the leg part 42 is elastically bent and deformed when the joint 1 is bent as described later, means for elastically relieving the external force to the means for giving the rigidity in the second spring element 4. It corresponds to.

  As shown in FIG. 6A, the first spring element 3 includes an annular substrate portion 31 having a through hole 34 in the radial center portion, and a surface direction of the substrate portion 31 from the periphery of the substrate portion 31. And a plurality (six in this example) of leg portions 32 projecting in the radial direction while being inclined.

  The board portion 31 is provided with bolt insertion holes 35 for fastening the board at a phase that is equidistant (60 ° in this example) along the circumferential direction. The substrate portion 31 corresponds to a means for giving rigidity in the first spring element 3.

  The six leg portions 32 are arranged at equal intervals (60 ° intervals) along the circumferential direction so as to have the same phase as the bolt insertion hole 35 (corresponding to the first phase). As with the second spring element 4, each leg portion 32 is bent with respect to the base plate portion 31 so as to incline at the predetermined angle toward the front side in FIG. It is bent so as to be parallel to the substrate part 31. Note that a bolt insertion hole 36 for connecting the spring unit is provided at the distal end portion 33. As described above, the leg 32 elastically bends and deforms when the joint 1 is bent as will be described later. Therefore, the external force to the means for giving the rigidity in the first spring element 3 is elastically applied. Corresponds to a means of mitigation.

  In addition, the 1st spring element 3 and the 2nd spring element 4 can be produced by sheet metal processing, for example using stainless steel bands for springs, such as SUS301 and SUS316.

<Combination of spring elements>
Then, the first spring element 3 and the second spring element 4 having the above-described configuration are configured such that the base plate portion 31 and the base plate portion 41 are combined and overlapped to form the spring unit 2. At this time, as shown in FIG. 5 and FIG. 4B described above, the connection between the base plate portion 31 of the first spring element and the base plate portion 41 of the second spring element 4 is the bolt insertion hole of the base plate portion 31. 35 and the bolt 10a inserted into the bolt insertion hole 45 of the board portion 41 and the nut 10b fastened to the bolt 10a (the illustration of the bolt 10a and nut 10b is omitted in FIG. 4A). ). The bolt 10a is not limited to tightening the nut 10b on the base plate 41 side after the bolt 10a is inserted from the bolt insertion hole 35 side to the bolt insertion hole 45, but conversely, the bolt 10a is inserted from the bolt insertion hole 45 side to the bolt insertion hole 35. Later, the nut 10b may be tightened on the substrate part 31 side. Moreover, the coupling | bonding of the board | substrate part 31 and the board | substrate part 41 can also be based on caulking.

  As a result of the above coupling, as shown in FIGS. 4 and 5, the first spring element 3 and the second spring element 4 have a phase in the circumferential direction of the six leg portions 32 and a phase in the circumferential direction of the six leg portions 42. Are overlapped in a so-called back-to-back manner with the leg portion 32 and the substrate portion 31, and the leg portion 42 and the substrate portion 41. At this time, the leg portion 42 of the second spring element 4 is located between the two adjacent leg portions 32, 32 of the first spring element 3 when viewed from the axial direction, and the second spring element 4 is adjacent. The leg 31 of the first spring element 3 is located between the two legs 42, 42.

<Construction of joints by connecting spring units>
As already described, the joint 1 is configured by connecting a plurality (30 in the above example) of the spring units 2 having the above configuration along the axial direction. The connection mode of the spring unit 2 will be described with reference to FIGS. In the following, in order to clarify the configuration and facilitate understanding, a case where two spring units 2L and 2R are connected to each other in the joint 1 (as an example of the plurality of examples) will be described as an example. Each of the spring units 2L and 2R has the same configuration as that of the spring unit 2 and has different circumferential positions when assembled in the joint 1 (described later).

<Connection between two spring units 2L and 2R>
As shown in FIGS. 7 and 8, in each of the two spring units 2L and 2R provided in the joint 1, the second spring element 4 is on the input side (corresponding to the second side along the axial direction). The leg portion 42 is directed toward the input side with respect to the base plate portion 41 while the first spring element 3 is positioned on the output side (corresponding to the first side along the axial direction). The portion 42 is directed to the output side with respect to the substrate portion 41. All the leg portions 32 of the first spring element 3 of the input-side spring unit 2L and all the leg portions 42 of the second spring element 4 of the output-side spring unit 2R are in the axial direction (FIGS. 7 and 7). 8 in the left-right direction). Then, after the bolts 11 a are respectively inserted from the unit connection bolt insertion holes 46 of the tip portions 43 of the leg portions 42 into the unit connection bolt insertion holes 36 of the tip portions 33 of the leg portions 32, the leg portions 32 are inserted. The two spring units 2L and 2R are connected by tightening the nut 11b to the bolt 11a on the side. Since the bolt 11a and the nut 11b connect the leg portion 32 of the first spring element 3 and the leg portion 42 of the second spring element 4 as described above, the external force in the spring units 2L and 2R is elastically applied. This corresponds to a means for combining the means for relieving mechanically.

  Here, due to the difference in structure as described above, the first spring element 3 and the second spring element 4 are arranged in the circumferential direction of the leg portions 32 and 42 when the bolt insertion holes 32 and 42 are used as a reference. The phase is shifted by 30 °. As a result, the legs 32 of the first spring element 3 of the spring unit 2L and the legs 42 of the second spring element 4 of the spring unit 2R are connected as described above, so that the units 2L and 2R are ( Although they have the same structure, they are incorporated in the joint 1 in a positional relationship that their phases are shifted by 30 ° in the circumferential direction.

<Connection between input side boss 5 and spring unit 2L>
At this time, the first spring element 3 similar to the above is attached to the input side of the boss 5 (left side in FIGS. 7 and 8). That is, after the bolt 12 (the same bolt as the bolt 11a) is inserted into the board connecting bolt insertion hole 35 provided in the input-side boss 5, the bolt 12 is connected to the output-side end face of the boss 5. The first spring element 3 is attached to the output side of the boss 5 by being screwed into the screw hole 12a.

  The second spring element 4 of the spring unit 2L is coupled to the first spring element 3. The coupling at this time is performed by the same method as the coupling of the first spring element 3 and the second spring element 4 in each spring unit 2. That is, by performing the circumferential alignment of the first spring element 3 attached to the boss 5 and the second spring element 4 of the spring unit 2L, the leg portion 32 of the first spring element 3 of the boss 5 and the spring The leg portion 42 of the second spring element 4 of the unit 2L is opposed to the axial direction (left and right direction in FIGS. 7 and 8). Thereafter, the bolt 13a (similar to the bolt 11a) from one side into the bolt connection hole 36 for connecting the unit at the tip 33 of the leg 32 and the bolt insertion hole 46 for connecting the unit 43 at the tip 43 of the leg 42. And the nut 13b (the same nut as the nut 11b) is tightened into the bolt 13a. Thus, the spring unit 2L is attached to the boss 5 on the input side.

<Connection between output-side boss 6 and spring unit 2R>
A second spring element 4 similar to the above is attached to the output side of the boss 6 (the right side in FIGS. 7 and 8). That is, after the bolt 12 (which is the same bolt as the bolt 11a) is inserted into the board connecting bolt insertion hole 45 provided in the output-side boss 6, the bolt 12 is connected to the input-side end surface of the boss 6. The second spring element 4 is attached to the input side of the boss 6 by being screwed into a screw hole (not shown).

  The first spring element 3 of the spring unit 2R is coupled to the second spring element 4. The coupling at this time is also performed in the same manner as the coupling between the first spring element 3 and the second spring element 4 in each spring unit 2 as described above. That is, by performing the circumferential alignment of the second spring element 4 attached to the boss 6 and the first spring element 3 of the spring unit 2R, the leg portion 42 of the second spring element 4 of the boss 6 and the spring The leg portion 32 of the first spring element 3 of the unit 2 is opposed to the axial direction (left and right direction in FIGS. 7 and 8). Thereafter, the bolt 13a is inserted from one side into the bolt insertion hole 45 for unit connection of the tip portion 43 of the leg portion 42 and the bolt insertion hole 36 for unit connection of the tip portion 33 of the leg portion 32, By tightening the nut 13b to the bolt 13a, the spring unit 2R is attached to the boss 65 on the output side.

  As described above, the boss 5 on the input side, the spring unit 2L, the spring unit 2R, and the boss 6 on the output side are connected in this order, and the joint 1 is constructed. At this time, as described above, since all the first spring elements 3 and the second spring elements 4 are each provided with the through-holes 34 and 44 in the axial direction in the radial center, the inside of the joint 1 A hollow portion including the through holes 34 and 44 is formed in the axial direction.

  7 and 8, for convenience of explanation, the first spring element 3 attached to the boss 5 on the input side and the second spring element 4 attached to the boss 6 on the output side are connected to each other. The case where the two spring units 2L and 2R are attached has been described as an example. However, as described above, for example, when 30 spring units 2 are connected along the axis in the same manner as described above, these 30 spring units 2 are connected in the same manner as described above. The first spring element 3 attached to the input-side boss 5 and the second spring element 4 attached to the output-side boss 6 are attached (see FIGS. 1 and 2). That is, the second spring element 4 of the spring unit 2 located on the most input side among the 30 spring units 2 is connected to the first spring element 3 attached to the boss 5 on the input side in the same manner as described above. . Also, the first spring element 3 of the spring unit 2 located on the most output side among the 30 spring units 2 is coupled to the second spring element 4 attached to the output-side boss 6 in the same manner as described above. .

<Effects of First Embodiment>
As described above, the joint 1 of the present embodiment is configured by connecting a plurality of spring units 2 along the axis. Each spring unit 2 includes a spring element 3 and a spring element 4, and each spring element 3, 4 includes a base plate portion 31, 41 and a plurality of leg portions 32, 42. When the plurality of spring units 2 are coupled along the axis as described above, the plurality of legs 32 of the spring element 3 of one spring unit 2 of the two adjacent spring units 2 and 2 The plurality of legs 42 of the spring element 4 of the other spring unit 2 are coupled.

  At this time, in each of the spring elements 3 and 4 of the two adjacent spring units 2 and 2, the plurality of leg portions 32 and 42 are provided so as to protrude in the radial direction while being inclined from the substrate portions 31 and 41. . Accordingly, the plurality of leg portions 32 and 42 of each of the two adjacent spring units 2 and 2 coupled as described above are elastically bent, whereby the spring elements 3 and 4 of the two spring units 2 and 2 are combined. The relative displacement between the substrate portions 31 and 41 can be allowed. As a result, in the joint 1 of the present embodiment, a plurality of spring units 2 (for example, 30 in the above example) are connected along the axial center, so that the relative displacement allowance function by the elastic deformation as described above is achieved. It can be obtained by overlapping every two adjacent spring units 2. Therefore, a relatively large amount of bending is obtained when connecting the input side shaft (in the above example, the rotation axis on the driving source side) and the output side shaft (in the above example, the rotation axis on the driven side). Can do.

  An example of the above effect is shown in FIG. As shown in FIG. 9, when a force is applied to the boss 5 and the boss 6 in a direction orthogonal to the axial direction (see white arrows), the joint 1 of the present embodiment is such that each spring unit 2 has the above-described structure. Based on each bending, it can be bent into a partial arc shape in side view as shown. According to the study by the inventors of the present application, the amount of bending obtained in the joint 1 depends on the number of spring units 2 connected, the material of the spring unit 2, the thickness, and the like, but about 30 as described above, for example. When the spring unit 2 was connected, it was confirmed that bending was possible up to about 90 °.

  In the present embodiment, in particular, in each spring unit 2, the base plate portion 31 of the first spring element 3 and the base plate portion 41 of the second spring element 4 are connected to the leg while the first spring element 3 is positioned on the output side. The portion 32 is directed to the output side, and the second spring element 4 is superimposed on the input side while the leg portion 42 is directed to the input side.

  That is, each spring unit 2 is configured by stacking the first spring element 3 and the second spring element 4 with the plurality of leg portions 32 and 42 facing away from each other, back to back. Thereby, the relative displacement allowable function by elastic deformation can be reliably exhibited in both the input side and the output side in one spring unit 2.

  In the present embodiment, in particular, the spring elements 3 and 4 are made of stainless steel.

  Thereby, a relatively large deflection amount can be obtained while ensuring high durability of the joint 1.

  In the present embodiment, in particular, each spring unit 2 has a phase in the circumferential direction of the plurality of legs 32 of the first spring element 3 in a state where the first spring element 3 and the second spring element 4 are overlapped. And the phase in the circumferential direction of the plurality of leg portions 42 of the second spring element 4 is different from each other.

  As a result, in the adjacent first spring element 3 and second spring element 4 provided in one spring unit 2, the plurality of leg portions 32 and 42 are not overlapped with each other when viewed from the axial direction. Position (see FIGS. 4A and 5). As a result, it is possible to secure a working space when the spring elements 3 and 4 are coupled to connect two adjacent spring units 2 as described above.

  In the present embodiment, in particular, the base plate portions 31 and 41 of the spring elements 3 and 4 include through holes 34 and 44 in the central portion in the radial direction. Thereby, since the cable can be routed inside the joint 1 from the input side to the output side, the convenience for the user is improved as compared with the case where the outside of the joint 1 is routed.

<Modification>
The disclosed embodiments are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit and technical idea thereof. Hereinafter, such modifications will be described in order.

(1) When the first spring element and the second spring element are overlapped in the opposite direction In the joint 1 of the above embodiment, FIG. 4 (a), FIG. 4 (b), FIG. 5, FIG. In each spring unit 2, the first spring element 3 located on the input side faces each leg 32 toward the input side, and the second spring element 4 located on the output side in each spring unit 2. The base portion 31 of the first spring element 3 and the base portion 41 of the second spring element 4 are coupled in a manner in which the two are directed to the output side (a so-called back-to-back manner). However, the present invention is not limited to this, and in at least some of the plurality of spring units, the first spring element 3 positioned on the input side faces each leg 32 toward the output side and the second spring element positioned on the output side. 4 is a mode in which each leg portion 42 is directed to the input side (a so-called stomach-fitting mode opposite to the back-to-back), and the base plate portion 31 of the first spring element 3 and the base plate portion 41 of the second spring element 4 are connected to each other. A combined unit (corresponding to the second spring unit) may be used. In this case, the leg portion 32 of the first spring element 3 protrudes further to the output side so as to enter the gap between the adjacent leg portions 42, 42 of the second spring element 4, and the leg portion 42 of the second spring element 4 is The first spring element 3 protrudes further toward the input side so as to enter the gap between the adjacent leg portions 32, 32.

  Further, for example, in at least one spring unit (corresponding to the third spring unit) among the plurality of spring units 2, the spring element (corresponding to the third spring element) having the same configuration as the first spring element 3 in the above embodiment. As described above, not all the leg portions 32 are directed in the same direction (in the above example, the output side) from the substrate portion 31, but a part of the leg portions 32 is directed to the output side and the remaining leg portions are directed to the input side. You may make it face. In this case, the legs 32 are arranged at appropriate intervals (not necessarily at equal intervals) along the circumferential direction so as to have a predetermined phase (corresponding to a third phase). Similarly, in a spring element having a configuration similar to that of the second spring element 4 (corresponding to the fourth spring element), some of the leg portions 42 are output from the base plate portion 41 to the output side, and the remaining leg portions 42 are input side. You may make it face. In this case, the leg portions 42 are arranged at appropriate intervals (not necessarily at equal intervals) along the circumferential direction so as to have a predetermined phase (corresponding to the fourth phase).

  Further, in the above case, the so-called back-to-back structure or the stomach-to- stomach structure as described above may be used, but when the leg portions 32 and 42 protrude to the output side (or input side) as described above, It is configured to protrude without interfering with the second spring element 4 or the first spring element 3.

  Also in the modified example, as in the first embodiment, it is possible to reliably exhibit the relative displacement permissible function by elastic deformation on both the input side and the output side in one first spring unit 2, and the same effect Get.

(2) When providing a spring unit including a spring element having greater rigidity In the first embodiment, each spring unit 2 constituting the joint 1 has an equivalent configuration (equivalent spring element 3 and second spring element). 4) and equivalent rigidity, but is not limited thereto. That is, in a part of the plurality of spring units 2 constituting the joint 1 (corresponding to the fourth spring unit), the leg portion 32 has the same configuration as the first spring element 3 facing the output side, For example, the spring element 3 ′ (not shown; corresponding to the fifth spring element) is made more rigid than the first spring element 3 by increasing the thickness (or a structure in which a plurality of first spring elements 3 are stacked). May be provided. Similarly, by providing the same structure as the second spring element 4 with the leg portion 42 facing the input side, for example, by increasing the thickness (or a structure in which a plurality of the second spring elements 4 are stacked). A spring element 4 ′ (not shown; corresponding to a sixth spring element) having higher rigidity than the second spring element 4 may be provided. In the fourth spring unit, both the spring element 3 'and the spring element 4' may be provided, or one of them may be provided.

  Thereby, for example, when it is expected that a rope-like bend of jumping rope will occur on the joint 1 during high-speed rotation, the spring unit at a portion to which a large external force is applied (for example, in the vicinity of both ends along the axial direction) By using a unit that uses the fifth spring element instead of the first spring element 3 (or a unit that uses the sixth spring element instead of the second spring element 4), the spring constant of the spring unit can be reduced. The rigidity can be increased and the rigidity can be improved.

Second Embodiment
Next, 2nd Embodiment which applied the coupling similar to the coupling of the said 1st Embodiment to the power transmission system of a wind power generation system is described using FIG.

  As shown in FIG. 10, the wind power generation system 50 of the present embodiment includes a tower 51 installed in the vertical direction, a nacelle 52 supported on the tower 51, and a front side of the nacelle 52 (left side in FIG. 10). A rotor hub 54 rotatably attached to the end, a plurality of blades 53 attached around the rotor hub 54, a rotor rotating shaft 55 provided on the rotor hub 54 and extending horizontally into the nacelle 52, and the nacelle 52 A generator 56 (corresponding to a rotating electrical machine) installed in the interior, a generator rotating shaft 57 (corresponding to a rotating shaft attached to the rotor) extending horizontally from the generator 56, and a front of the generator rotating shaft 57 And a joint 58 that is provided on the side (corresponding to the load side) and connects the power generation rotating shaft 57 and the rotor rotating shaft 55. The rotor rotation shaft 55, the rotor hub 54, and the blade 53 correspond to loads.

  The generator 56 includes a stator (not shown) and a rotor arranged with a gap between the stator and a magnetic gap, and a generator rotating shaft 57 is attached to the rotor. The generator 57 generates power in cooperation with the stator as the rotor rotates.

  The joint 58 has the same configuration as the joint 1 described above. That is, the joint 58 is positioned at the output side end, and the plurality of spring units 2 connected along the axis, the input side boss 5 to which the spring unit 2 positioned at the input side end is attached. And an output-side boss 6 to which the spring unit 2 is attached. The rotor rotation shaft 55 is attached to the boss 5 of the joint 58, and the generator rotation shaft 57 is attached to the boss 6 of the joint 58. The rotor rotation shaft 55 and the driven rotor side rotation shaft 55 are driven via the joint 58. The generator rotating shaft 57 on the side is connected. The joint 58 can also be connected to the generator rotating shaft 57 via a speed increaser (not shown).

  In the wind power generation system 50 configured as described above, the blade 53 rotates by receiving wind, and the rotor hub 55 rotates by the rotation of the rotor hub 54, and the rotational force of the blade 53 is input to the joint 58 from the rotor shaft 55. The joint 58 to which the rotational force is input rotates, and the input rotational force is output to the generator rotating shaft 57. The rotor is rotated by the rotation of the generator rotating shaft 57, so that the rotor and the stator are connected. Collaborate to generate electricity.

  At this time, the rotor rotation shaft 55 swings due to the disturbance of the wind pressure received by the blade 53, and a deviation (deviation) occurs between the axial direction of the rotor rotation shaft 55 and the axial direction of the generator rotation shaft 57. In addition, the rotational force input from the rotor rotating shaft 55 can be transmitted to the generator rotating shaft 55 while the joint 58 is bent so as to cancel the deviation. As a result, the rotor rotates smoothly, and the power generation operation can be performed smoothly without causing mechanical vibration.

  In the wind power generation system configured as described above, for example, as shown in FIG. 11, the generator 56 may be arranged vertically in the nacelle 52. In this case, the generator rotation shaft 57 extends upward from the generator 56 and is in a positional relationship orthogonal to the rotor rotation shaft 55. As described above, the joint 58 includes, for example, 30 or more spring units 2 connected between the input-side hub 5 and the output-side hub 6, so that the rotor 58 is orthogonally curved while being bent by about 90 °. The rotation can be smoothly transmitted between the rotating shaft 57 and the generator rotating shaft 57.

  In addition to those already described above, the methods according to the above-described embodiment and modification examples may be used in appropriate combination.

  In addition, although not illustrated one by one, the above-described embodiments and modifications are implemented with various modifications without departing from the spirit thereof.

1 Joint 2 Spring unit (first spring unit)
DESCRIPTION OF SYMBOLS 3 1st spring element 4 2nd spring element 5 Input side boss 6 Output side boss 31 Substrate part 32 Leg part 33 Tip part 34 Through-hole 35 Bolt hole for board connection 36 Bolt hole for spring unit connection 41 Board part 42 Leg part 43 Tip part 44 Through hole 45 Bolt hole for board connection 46 Bolt hole for spring unit connection 50 Wind power generation system 55 Rotor rotating shaft 57 Generator rotating shaft 56 Generator 58 Joint

Claims (10)

A joint having a plurality of spring units connected along an axis,
Each spring unit has a plurality of spring elements,
Each spring element
A substrate section;
A plurality of leg portions inclined from the substrate portion and projecting in a radial direction;
With
Two of the spring units adjacent along the axis are
By combining the legs of the spring elements with each other,
A joint characterized by being connected. The plurality of spring units are:
The base portion of one first spring element in which the plurality of leg portions are arranged at a first phase that is equidistant from each other in the circumferential direction, and 1 that the plurality of leg portions are arranged at a second phase that is equidistant from each other. The base part of two second spring elements;
The plurality of legs are directed to the first side while the first spring element is positioned on the first side along the axial direction, and the second spring element is directed to the second side along the axial direction. 2. The joint according to claim 1, further comprising at least one first spring unit that is overlapped in a manner that the plurality of leg portions are directed to the second side while being positioned at a position. The plurality of spring units are:
The base portion of one first spring element in which the plurality of leg portions are arranged at a first phase that is equidistant from each other in the circumferential direction, and 1 that the plurality of leg portions are arranged at a second phase that is equidistant from each other. The base part of two second spring elements;
The plurality of leg portions are directed to the second side while the first spring element is positioned on the first side along the axial direction, and the second spring element is directed to the second side along the axial direction. 2. The joint according to claim 1, further comprising at least one second spring unit, wherein the plurality of leg portions are overlapped in a manner to be directed to the first side while being positioned at a position. The plurality of spring units are:
The base portion of one third spring element in which the plurality of leg portions are arranged in a predetermined third phase in the circumferential direction, and one of the plurality of leg portions arranged in a predetermined fourth phase in the circumferential direction The substrate portion of the fourth spring element;
One of the third spring element and the fourth spring element is located on the first side along the axial direction, while the other is located on the second side along the axial direction, and the third At least both of the spring element and the fourth spring element are overlapped in such a manner that a part of the plurality of legs is directed to the first side and the remaining legs are directed to the second side. The joint according to claim 1, comprising one third spring unit. The joint according to any one of claims 2 to 4, wherein the spring element is made of stainless steel. The first spring unit is
In a state in which the first spring element and the second spring element are overlapped, the phase in the circumferential direction of the plurality of legs of the first spring element and the circumference of the plurality of legs of the second spring element The joint according to claim 5, wherein phases in directions are different from each other. The base portion of each spring element is
The joint according to claim 6, further comprising a through hole in a central portion in the radial direction. The plurality of spring units are:
One fifth spring element having a larger rigidity than the first spring element of the first spring unit, the plurality of legs facing toward the first side, and the second spring element of the first spring unit A sixth spring element having a large rigidity, wherein the plurality of legs are directed to the second side,
The joint according to claim 7, comprising at least one fourth spring unit comprising at least one of the following. A joint having a plurality of spring units connected along an axis,
Each spring unit has a plurality of spring elements,
Each spring element
Means for imparting rigidity;
Means for elastically relieving external force to the means for giving the rigidity,
Two of the spring units adjacent along the axis are
Means for elastically relieving the external force of the spring elements of each other;
A joint characterized by comprising: A stator,
A rotor disposed with a magnetic air gap between the stator and
A rotating shaft attached to the rotor;
The joint according to any one of claims 1 to 7, wherein the joint is provided on a load side of the rotary shaft and connects the rotary shaft and the load.
A rotating electric machine comprising:

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