JP4624728B2 - Elastic shaft coupling - Google Patents

Description

  The present invention relates to an elastic shaft coupling that is provided between a drive shaft and a driven shaft that are arranged coaxially with each other and connects the two shafts.

  As a shaft coupling used in a vehicle steering apparatus, there is an elastic shaft coupling that absorbs vibrations of an engine and wheels and suppresses transmission of such vibrations to the steering wheel.

For example, in Patent Document 1, a rubber main body member disposed so as to intersect with an axis between a drive shaft and a driven shaft disposed on substantially the same axis is provided at each end of both shafts. A plurality of through-holes formed so as to extend in the axial direction on a circumference centering on the axis in the main body member, each of the plurality of attachment portions being connected to each other from the axial direction, Each of the through holes has a cylindrical portion inserted therein and a connecting portion for connecting the cylindrical portions in the circumferential direction. The core is embedded in the main body member, and is inserted into each cylindrical portion of the core. A pipe member in which the mounting portions of both shafts are alternately inserted and connected in the circumferential direction, and between the inner peripheral surface of each cylindrical portion of the core body and the pipe member inserted in the cylindrical portion. Further, there is disclosed one in which a rubber sleeve is interposed. According to this, vibration transmission between both shafts can be sufficiently suppressed, and the rigidity in the torsional direction can be prevented from changing during torque transmission, so that the desired power transmission characteristics can be stably obtained. It is described.
JP 2003-21163 A

  Here, the elastic shaft joint is required to further reduce the rigidity in the axial direction from the viewpoint of suppressing vibration transmission. In addition, from the viewpoint of facilitating transmission of power from the drive shaft to the driven shaft, it is also required to maintain high rigidity in the rotational direction (twist direction). In view of this, the present inventor has now developed an elastic shaft joint that has low axial rigidity and maintains high rotational rigidity.

  The present invention has been made in view of such points, and an object of the present invention is to provide an elastic shaft that is provided between a drive shaft and a driven shaft that are arranged coaxially with each other and connects the two shafts. It is an object of the present invention to provide a technique for reducing the axial rigidity of a joint. Furthermore, it is providing the technique of maintaining the high rigidity of a rotation direction.

A first invention is an elastic shaft coupling that is provided between a driving shaft and a driven shaft that are coaxially arranged, and connects the two shafts, and includes a disk-shaped elastic body, and the elastic body Inside, a plurality of drive shaft coupling cylinders each having an axial direction parallel to the elastic body axial direction and connected to one axial end of the drive shaft, and the axial direction parallel to the elastic body axial direction, respectively. In addition, the same number of driven shaft coupling cylinders and the same number of driven shaft coupling cylinders, to which one end of the driven shaft in the axial direction is coupled, are alternately arranged in the circumferential direction of the elastic body. Between the drive shaft coupling and the driven shaft coupling cylinders adjacent to each other in the circumferential direction of the elastic body inside the body, a space portion and a plate-like member extending in the circumferential direction of the elastic body are respectively disposed . Driving shaft coupling and driven shaft coupling cylinders adjacent to each other in the circumferential direction of the elastic body of the plate-like member and in the circumferential direction of the elastic body Is spaced from each other, and the plate-like members are connected to each other between the drive shaft connecting cylinder and the driven shaft connecting cylinder adjacent to each other in the circumferential direction of the elastic body inside the elastic body. The first and second plate-like members are disposed with a space in the elastic body axial direction, and the space portion is connected to the drive shaft adjacent to each other in the elastic body circumferential direction of the outer peripheral surface of the elastic body. The first and second plate-like members inside the elastic body are formed only between the first and second cylinders for connecting the driven shaft and the driven shaft .

As a result, space portions are formed between the drive shaft connecting cylinder and the driven shaft connecting cylinders that are adjacent to each other in the circumferential direction of the elastic body inside the elastic body . Therefore, such a space portion is not formed. Compared to the case, the axial rigidity can be reduced.

In addition , a plate-like member extending in the elastic body circumferential direction is disposed between the drive shaft coupling cylinder and the driven shaft coupling cylinder adjacent to each other in the circumferential direction of the elastic body inside the elastic body. High rigidity in the direction can be maintained.

Further, since at least one of the elastic member circumferential end ends of the plate-like member and the driving shaft coupling cylinder and the driven shaft coupling cylinder adjacent to each other in the circumferential direction of the elastic body is spaced, the shaft High rigidity in the rotational direction can be maintained while reducing the rigidity in the direction.

According to a second aspect of the present invention, in the first aspect , the plate-like member is connected to the driving shaft coupling cylinder and the driven shaft coupling cylinder that are adjacent to each other in the elastic body circumferential direction at one end surface in the elastic body circumferential direction . The other end surface of the plate-like member in the circumferential direction of the elastic body and the other of the cylinders for connecting the driving shaft and the driven shaft coupling that are adjacent to each other in the circumferential direction of the elastic body . A space is provided between the cylinder and the cylinder.

As a result, the plate-like member is attached to one of the cylinders for driving shaft coupling and driven shaft coupling adjacent to each other in the circumferential direction of the elastic body at one end surface in the circumferential direction of the elastic body . Compared with the case where it is not attached as such, the manufacture of the elastic shaft coupling can be facilitated.

According to a third aspect of the present invention, in the first aspect , the plate-like member includes a driving shaft coupling cylinder and a driven shaft coupling cylinder that are adjacent to each other in the elastic body circumferential direction at one end surface in the elastic body circumferential direction . Of the cylindrical members for driving shaft coupling and driven shaft coupling , which are integrally formed with one of the cylindrical members, and the other end surface in the circumferential direction of the elastic body of the plate member and the cylindrical body for driving shaft coupling adjacent to each other in the circumferential direction of the elastic body It is characterized in that a gap is provided between the cylinder and the cylinder.

As a result, the plate-like member is integrally formed with one of the cylinders for driving shaft coupling and driven shaft coupling adjacent to each other in the elastic body circumferential direction at one end surface in the circumferential direction of the elastic body . Therefore, it is possible to facilitate the manufacture of the elastic shaft joint as compared with the case where it is not integrally molded.

According to the first invention, the space portions are formed between the drive shaft connecting cylinder and the driven shaft connecting cylinders adjacent to each other in the circumferential direction of the elastic body inside the elastic body. Compared with the case where no is formed, the rigidity in the axial direction can be reduced. Therefore, vibration transmission can be suppressed.

In addition , a plate-like member extending in the elastic body circumferential direction is disposed between the drive shaft coupling cylinder and the driven shaft coupling cylinder adjacent to each other in the circumferential direction of the elastic body inside the elastic body. High rigidity in the direction can be maintained. Therefore, smooth transmission of the power of the drive shaft to the driven shaft can be achieved.

Further, since at least one of the elastic member circumferential end ends of the plate-like member and the driving shaft coupling cylinder and the driven shaft coupling cylinder adjacent to each other in the circumferential direction of the elastic body is spaced, the shaft High rigidity in the rotational direction can be maintained while reducing the rigidity in the direction. Therefore, smooth transmission of power of the drive shaft to the driven shaft can be achieved while suppressing transmission of vibration.

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

(Embodiment 1)
As shown in FIG. 1, the steering device 1 according to the embodiment of the present invention includes a steering wheel 2 side shaft 3 having a steering wheel 2 attached to an upper end portion, and a lower end portion of the shaft 3 connected to a steering gear box 4. And a connecting shaft 5 connected to the input shaft. The left and right front wheels (not shown) of the automobile are connected to the output shafts on both sides of the steering gear box 4 in the vehicle width direction. The connecting shaft 5 is disposed so as to extend in the vertical direction. The connecting shaft 5 is divided into upper and lower parts in the axial center portion, and each of them is a drive shaft (input shaft) 6 positioned on the steering wheel 2 side and a driven shaft (output shaft) 7 positioned on the steering gear box 4 side. It is said that.

  As shown in FIGS. 1 and 2, the drive shaft 6 and the driven shaft 7 are arranged coaxially with each other. A connecting member 6a for connecting the drive shaft 6 and the driven shaft 7 and the elastic shaft joint 30 (which will be described later) to one end portion in the axial direction of the drive shaft 6 and the driven shaft 7 on the elastic shaft joint side. , 7a are provided. These connecting members 6a and 7a are formed in a bowl shape, and two through holes (not shown) penetrating in the thickness direction are formed. These through holes are for inserting bolts 70 (which will be described later). Between the lower surface of the connecting member 6 a of the drive shaft 6 and the upper surface of the connecting member 7 a of the driven shaft 7, an elastic shaft joint 30 that connects them is disposed.

  As shown in FIGS. 2 to 4, the elastic shaft coupling 30 includes a disc-shaped rubber elastic body 40 and two stopper plates 60, 60 respectively disposed on both end sides in the axial direction of the rubber elastic body 40. And have.

  The rubber elastic body 40 is provided coaxially with the drive shaft 6 and the driven shaft 7. The rubber material forming the rubber elastic body 40 may be, for example, natural rubber having excellent vibration isolation performance, synthetic rubber such as chloroprene rubber or EPDM, or rubber material in which natural rubber and synthetic rubber are mixed.

  The rubber elastic body 40 has first to fourth through holes 40a, 40b, 40c, and 40d that are penetrated in a rubber elastic body axial direction (rubber elastic body thickness direction) on a circumference around the axis at equal intervals. Is formed. That is, the through holes 40 a, 40 b, 40 c, 40 d are arranged side by side at equal intervals in the circumferential direction of the rubber elastic body 40. A through hole 40e that penetrates in the rubber elastic body axial direction is formed at the center of the rubber elastic body 40.

  The first to fourth through holes 40a, 40b, 40c, and 40d are fitted with hollow cylindrical metal first to fourth collar members 41, 42, 43, and 44, respectively. That is, the collar members 41, 42, 43, 44 are arranged at equal intervals inside the rubber elastic body 40 so that the axial direction is parallel to the rubber elastic body axial direction on the circumference centered on the axis. It is arranged. The length of each collar member 41, 42, 43, 44 in the rubber elastic body axial direction is the same as the length of each through hole 40 a, 40 b, 40 c, 40 d in the rubber elastic body axial direction, that is, the thickness of the rubber elastic body 40. is there. The connecting member 6a of the drive shaft 6 is connected to the first and third collar members 41, 43 via a pipe member 53 (which will be described later), while the second and fourth collar members 42, 44 are connected. Are connected via a pipe member 54 to the connecting member 7 a of the driven shaft 7. That is, the two collar members 41, 43 to which the connecting member 6a of the drive shaft 6 is connected and the two collar members 42, 44 to which the connecting member 7a of the driven shaft 7 are connected are the circumferences inside the rubber elastic body 40. They are arranged alternately in the direction. The drive shaft coupling cylinder according to the present invention corresponds to the first and third collar members 41 and 43, and the driven shaft coupling cylinder corresponds to the second and fourth collar members 42 and 44.

The rubber elastic body 40 is formed with four straight portions 40f, 40g, 40h, and 40i that are opened between the collar members 41, 42,... Adjacent to each other in the circumferential direction of the rubber elastic body. Yes. In addition, the space part which concerns on this invention respond | corresponds to the straight parts 40f, 40g, 40h, 40i.

  The first curly portion 40 f opens between the first and second collar members 41 and 42 on the outer peripheral surface of the rubber elastic body 40. The first straight portion 40f extends inward in the radial direction of the rubber elastic body between the first and second collar members 41 and 42 inside the rubber elastic body 40. The shape of the first curly portion 40f when viewed from the rubber elastic body axial direction is a sector shape.

  The second, third, and fourth curling portions 40g, 40h, 40i are respectively between the second and third collar members 42, 43 on the outer peripheral surface of the rubber elastic body 40, between the third and fourth collar members 43, 44, and An opening is formed between the fourth and first collar members 44 and 41. The configurations of the second, third, and fourth straight portions 40g, 40h, and 40i are substantially the same as those of the first straight portion 40f described above.

Between the collar members 41, 42,... Adjacent to each other in the circumferential direction of the rubber elastic body 40, two metal plates 45, 46,. The plate-like member according to the present invention corresponds to the plates 45, 46;

  The first and second plates 45 and 46 are disposed between the first and second collar members 41 and 42 inside the rubber elastic body 40. The first plate 45 is attached and fixed to the upper end portion of the outer peripheral surface of the first collar member 41 by welding. The first plate 45 extends from the upper end portion of the outer peripheral surface of the first collar member 41 to one side in the elastic body circumferential direction (clockwise in FIG. 3). There is a predetermined gap between one end surface of the first plate 45 in the circumferential direction of the elastic body (that is, the end surface of the first plate 45 opposite to the end surface attached to the first collar member 41) and the outer peripheral surface of the second collar member 42. Is provided. That is, the one end surface of the first plate 45 in the circumferential direction of the elastic body and the outer peripheral surface of the second collar member 42 are not in contact with each other. The second plate 46 is attached and fixed to the lower end portion of the outer peripheral surface of the second collar member 42 by welding. The second plate 46 extends from the lower end of the outer peripheral surface of the second collar member 42 to the other side in the circumferential direction of the elastic body (counterclockwise in FIG. 3). The other end surface of the second plate 46 in the circumferential direction of the elastic body (the end surface of the second plate 46 opposite to the end surface attached to the second collar member 42) and the outer peripheral surface of the first collar member 41 are separated from each other by a predetermined distance. . That is, the elastic body circumferential other end surface of the second plate 46 and the outer peripheral surface of the first collar member 41 are not in contact with each other.

  The 1st and 2nd plates 45 and 46 are each arrange | positioned at the rubber elastic body axial direction both sides of the 1st straight part 40f. That is, the first curly portion 40 f is formed between the first and second plates 45 and 46 inside the rubber elastic body 40. In other words, the first curly portion 40f and the first and second plates 45 and 46 overlap each other when viewed from the rubber elastic body axial direction. The shape of the first and second plates 45 and 46 when viewed from the axial direction of the rubber elastic body is a sector shape.

  The third and fourth plates 47 and 48, the fifth and sixth plates 49 and 50, and the seventh and eighth plates 51 and 52 are respectively between the second and third collar members 42 and 43 inside the rubber elastic body 40. Arranged between the third and fourth collar members 43 and 44 and between the fourth and first collar members 44 and 41. The configurations of the third and fourth plates 47 and 48, the fifth and sixth plates 49 and 50, and the seventh and eighth plates 51 and 52 are substantially the same as those of the first and second plates 45 and 46, respectively. is there. In other words, two plates 45, 52; 48, 49 are arranged at the upper ends of the outer peripheral surfaces of the first and third collar members 41, 43 so as to extend on both sides in the elastic body circumferential direction, while the second In addition, two plates 46, 47; 50, 51 are arranged at the lower ends of the outer peripheral surfaces of the fourth collar members 42, 44 so as to extend on both sides in the elastic body circumferential direction.

  As shown in FIG. 4, hollow cylindrical first to fourth pipe members 53, 54 are fitted into the first to fourth collar members 41, 42, 43, 44, respectively. Each of the pipe members 53 and 54 has a bolt 70 inserted through the hollow portion thereof. The length of each pipe member 53, 54 in the rubber elastic body axial direction is longer than the length of the collar members 41, 42, 43, 44 in the rubber elastic body axial direction, that is, the thickness of the rubber elastic body 40. The first and third pipe members 53 protrude from the upper end surface in the axial direction of the rubber elastic body 40 and extend upward through cutout portions 60a and 60a (which will be described later) of the upper stopper plate 60. At this time, gaps of a predetermined length are set between the outer peripheral surfaces of the first and third pipe members 53 and the notches 60a and 60a of the upper stopper plate 60, respectively. Each of the second and fourth pipe members 54 protrudes from the lower end surface in the axial direction of the rubber elastic body 40 and extends downward through the notches 60 a and 60 a of the lower stopper plate 60. At this time, gaps of a predetermined length are set between the outer peripheral surfaces of the second and fourth pipe members 54 and the notches 60a and 60a of the lower stopper plate 60, respectively.

  As shown in FIGS. 2 and 4, hollow cylindrical resin spacers 57, 57, 57, 57 are provided in portions between the connecting members 6 a, 7 a and the rubber elastic body 40 in the pipe members 53, 54. Are externally fitted. Each of the spacers 57, 57, 57, 57 is for restricting the movement of the rubber elastic body 40 in the axial direction.

  As shown in FIG. 2, each stopper plate 60, 60 is formed in a circular shape. Each stopper plate 60, 60 is formed with a pair of through holes (not shown) penetrating in the thickness direction and a pair of notches 60a, 60a. These through holes and notches 60 a and 60 a are alternately arranged at intervals of 90 degrees in the circumferential direction of the stopper plate 60. The stopper plates 60, 60 are respectively disposed on both end surfaces in the axial direction of the rubber elastic body 40 so that the through holes and the notches 60a, 60a face each other. A gap having a predetermined length is set between the upper and lower stopper plates 60, 60 and the connecting members 6a, 7a of the drive shaft 6 and the driven shaft 7.

−Mounting of elastic shaft coupling to steering device−
Here, attachment of the elastic shaft joint 30 to the steering device 1 will be described. First, the elastic shaft coupling 30 is disposed between the lower end portion of the drive shaft 6 and the upper end portion of the driven shaft 7. Then, the two bolts 70 are respectively inserted in order through the through hole of the connecting member 6a of the drive shaft 6, the hollow portion of the first and third pipe members 53, and the through hole of the lower stopper plate 60, After insertion, nuts 71 and 71 are fitted and tightened to the tip portions of the bolts 70 and 70. Further, the other two bolts 70 are inserted through the through hole of the connecting member 7a of the driven shaft 7, the hollow portion of the second and fourth pipe members 54, and the through hole of the upper stopper plate 60, respectively. After the insertion, the nuts 71 and 71 are fitted and tightened to the tip portions of the bolts 70 and 70, respectively. As described above, the drive shaft 6 and the driven shaft 7 are coupled with the elastic shaft joint 30 interposed therebetween.

-Action of elastic shaft coupling-
Here, the operation of the elastic shaft joint 30 will be described. Even if traveling vibration or the like generated on the front wheels during traveling of the automobile is transmitted from the steering gear box 4 to the driven shaft 7, it is absorbed by the rubber elastic body 40.

  Here, in the present embodiment, from the viewpoint of reducing the rigidity in the axial direction of the rubber elastic body 40, the rubber elastic body 40 is formed with the straight portions 40f, 40g, 40h, and 40i. Therefore, running vibration and the like are sufficiently absorbed by the rubber elastic body 40. Therefore, traveling vibrations and the like are sufficiently attenuated and hardly transmitted to the drive shaft 6.

  The force acting in the rotation direction of the drive shaft 6 when the driver operates the steering wheel 2 is a rubber elastic body via the pipe member 53 and the collar members 41 and 43 on the drive shaft 6 side in the elastic shaft joint 30. 40, and then transmitted from the rubber elastic body 40 and the like to the driven shaft 7 and the steering gear box 4 via the collar members 42 and 44 and the pipe member 54 on the driven shaft 7 side.

Here, in the present embodiment, from the viewpoint of maintaining high rigidity in the rotational direction of the rubber elastic body 40, a plate is provided between the color members 41, 42,... Adjacent to each other in the circumferential direction of the rubber elastic body inside the rubber elastic body 40. 45, 46;... Are embedded two by two. Therefore, the force acting in the rotation direction of the drive shaft 6 is transmitted mainly to the plates 45, 46;... Via the pipe member 53 and the collar members 41, 43 on the drive shaft 6 side in the elastic shaft joint 30, and Are transmitted to the driven shaft 7 and the steering gear box 4 through the collar members 42 and 44 and the pipe member 54 on the driven shaft 7 side. Therefore, the force from the pipe member 53 and the collar members 41 and 43 on the drive shaft 6 side is prevented from being absorbed by the elastic characteristics of the rubber elastic body 40. Therefore, the power from the drive shaft 6 can be smoothly transmitted to the driven shaft 7.

-Effect-
As described above, according to the present embodiment, the straight portions 40f,... Are formed between the collar members 41, 42,... Adjacent to each other in the circumferential direction of the rubber elastic body inside the rubber elastic body 40. The axial rigidity can be reduced as compared with the case where such straight portions 40f,... Are not formed. Therefore, vibration transmission can be suppressed.

The color adjacent phases in the rubber elastic body circumferential direction of the inner rubber elastic body 40 members 41; since ... are disposed respectively; ... between plates 45 and 46 extending in the rubber elastic body circumferential direction High rigidity in the rotation direction can be maintained. Therefore, smooth transmission of the power of the drive shaft 6 to the driven shaft 7 can be achieved.

  Further, since at least one of the plates 45, 46;... Between the both ends of the rubber elastic body in the circumferential direction and the collar members 41, 42,... Is spaced apart, the axial rigidity is reduced. However, high rigidity in the rotational direction can be maintained. Therefore, smooth transmission of power from the drive shaft 6 to the driven shaft 7 can be achieved while suppressing vibration transmission.

  In addition, since the plates 45, 46; are attached to one of the color members 41, 42, ... at one end surface in the circumferential direction of the rubber elastic body, they are not attached as such. Compared to the above, the manufacture of the elastic shaft coupling 30 can be facilitated.

(Embodiment 2)
As shown in FIGS. 5 and 6, in the present embodiment, each of the color members 41,... And each of the plates 45, is made of resin, and each plate 45,. Are integrally formed with the collar members 41. Further, the inner peripheral surfaces of the respective color members 41, 42,... Are covered with rubber 41a, 42a,. The other points are almost the same as in the first embodiment. 5 and 6, illustration of the pipe members 53 and 54 and the spacers 57 and 57 is omitted.

  As described above, according to the present embodiment, the plates 45, 46;... Are integrally formed with any one of the color members 41, 42; The manufacturing of the elastic shaft coupling 30 can be facilitated as compared with the case where it is not integrally molded.

( Reference Example 1 )
As shown in FIGS. 7 and 8, this reference example has four plates 45,..., And each of these plates 45, 47, 49, 51 is one side in the circumferential direction of the elastic body (in FIG. The collar members 41, 42, 43, and 44 are welded to the upper end portions of the outer peripheral surfaces so as to extend in the clockwise direction. The other points are almost the same as in the first embodiment. 7 and 8, the pipe members 53 and 54 and the spacers 57 and 57 are not shown.

According to the present reference example , substantially the same effect as in the first embodiment can be obtained.

(Embodiment 3 )
As shown in FIGS. 9 and 10, in the present embodiment, the plates 45,... Are not welded or integrally formed to the collar members 41,. In other words, there is a predetermined interval between both end surfaces of the plates 45,... In the circumferential direction of the elastic body and the outer peripheral surfaces of the two collar members 41, 42; In other words, the elastic body circumferential end surfaces of the plates 45,... Are not in contact with the outer peripheral surfaces of the two collar members 41, 42; The other points are almost the same as in the first embodiment. 9 and 10, illustration of the pipe members 53 and 54 and the spacers 57 and 57 is omitted.

  According to this embodiment, substantially the same effect as that of the first embodiment can be obtained.

(Other embodiments)
In each of the above embodiments, two color members 41, 43 to which the connecting member 6a of the drive shaft 6 is connected and two color members 42, 44 to which the connecting member 7a of the driven shaft 7 are connected are provided. As long as they are the same number and are alternately arranged in the circumferential direction inside the rubber elastic body 40, three or more of them may be provided.

  In each of the above embodiments, the through hole 40e is formed in the central portion of the rubber elastic body 40. However, in place of the through hole 40e, a recess is formed in the central portion of both end surfaces in the axial direction of the rubber elastic body 40. May be.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the present invention is useful for an elastic shaft coupling or the like that is provided between a drive shaft and a driven shaft that are coaxially arranged and connects the two shafts.

1 is a perspective view of a steering device according to an embodiment of the present invention. It is a perspective view of an elastic shaft coupling. It is a top view of a rubber elastic body. It is the IV-IV sectional view taken on the line of FIG. It is a top view of a rubber elastic body. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is a top view of a rubber elastic body. It is the VIII-VIII sectional view taken on the line of FIG. It is a top view of a rubber elastic body. FIG. 10 is a sectional view taken along line XX in FIG. 9.

DESCRIPTION OF SYMBOLS 1 Steering device 6 Drive shaft 7 Driven shaft 30 Elastic shaft coupling 40 Rubber elastic body 40f, 40g, 40h, 40i Straight part (space part)
41, 42, 43, 44 Collar member (driving shaft coupling cylinder, driven shaft coupling cylinder)
45, 46, 47, 48, 49, 50, 51, 52 Plate (plate member)
53, 54 Pipe member 60 Stopper plate

Claims (3)

An elastic shaft coupling that is provided between a drive shaft and a driven shaft disposed coaxially with each other and connects the two shafts;
It has a disk-shaped elastic body,
Inside the elastic body, a plurality of drive shaft coupling cylinders each having an axial direction parallel to the elastic body axial direction and connected to one axial end of the drive shaft, and the axial direction is an elastic body shaft, respectively. The same number of driven shaft coupling cylinders and the same number of driven shaft coupling cylinders, which are parallel to the direction and to which one axial end of the driven shaft is coupled, are arranged alternately in the circumferential direction of the elastic body. ,
Between the drive shaft coupling and driven shaft coupling cylinders adjacent to each other in the circumferential direction of the elastic body inside the elastic body , a space portion and a plate-like member extending in the circumferential direction of the elastic body are respectively disposed. And
At least one of the elastic member circumferential direction both end surfaces of the plate-like member and the driving shaft coupling cylinder and the driven shaft coupling cylinder adjacent to each other in the circumferential direction of the elastic body is spaced apart.
The plate-like members are arranged between the drive shaft coupling cylinder and the driven shaft coupling cylinders adjacent to each other in the elastic body circumferential direction inside the elastic body, and are arranged at intervals in the elastic body axis direction. Having a second plate-like member,
The space portion is opened only between the drive shaft connecting cylinder and the driven shaft connecting cylinders adjacent to each other in the elastic body circumferential direction of the outer peripheral surface of the elastic body, and the first and the first inside the elastic body. An elastic shaft coupling formed only between two plate-like members . The elastic shaft coupling according to claim 1 ,
The plate-like member is attached to one of the cylinders for driving shaft coupling and driven shaft coupling adjacent to each other in the elastic body circumferential direction at one end surface in the circumferential direction of the elastic body ,
There is a gap between the other end surface in the circumferential direction of the elastic body of the plate-like member and the remaining cylindrical body among the driving shaft coupling cylinder and the driven shaft coupling cylinder which are adjacent to each other in the circumferential direction of the elastic body . An elastic shaft coupling characterized by that. The elastic shaft coupling according to claim 1 ,
The plate-like member is integrally formed with one of the cylinders for driving shaft coupling and driven shaft coupling adjacent to each other in the circumferential direction of the elastic body at one end surface in the circumferential direction of the elastic body. ,
There is a gap between the other end surface in the circumferential direction of the elastic body of the plate-like member and the remaining cylindrical body among the driving shaft coupling cylinder and the driven shaft coupling cylinder which are adjacent to each other in the circumferential direction of the elastic body . An elastic shaft coupling characterized by that.

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