JP3502295B2 - Flexible coupling with thrust load receiving function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of absorbing declination even when subjected to a large thrust load such as its own weight, and further, between the first hub and the spacer or between the first hub and the second hub. The present invention relates to a flexible coupling having a thrust load receiving function capable of adjusting a length of a set screw with a flat ball up to a supporting portion according to an interval.

[0002]

2. Description of the Related Art FIG. 7 shows a lower half of a conventional flexible coupling having a thrust load receiving function, and is a longitudinal sectional view corresponding to FIG. As shown in FIG. 7, the flexible coupling generally includes a first hub 1, a first disk 2, a spacer 3, a second disk (not shown), a second hub (not shown), and a second hub (not shown). A first thrust plate 4 attached to the hub 1 of No. 1 and a second thrust plate 5 attached to the spacer 3;
The second thrust plate 5 is integrally provided with a protrusion 6 as a thrust load transmitting member.

More specifically, the first hub 1
Is composed of a flange 1A and a boss 1B. Reamer bolt insertion holes 1C and through holes 1D are alternately formed in the flange 1A at intervals of 90 degrees in the circumferential direction, and a shaft hole 1E is formed in the boss 1B. A key groove 1F and a set screw with a hole 1G are provided. The first disk 2 is made of, for example, a metal leaf spring, has a center hole 2A, and is formed in a circumferential direction of 4A.
A hole for passing the individual reamer bolt 8 is formed.
The spacer 3 is a pair of members having a flange 3A and a boss 3B (the upper member of the pair of members is not shown).
Are connected by a hollow shaft member (not shown). Reamer bolt insertion holes 3C and through holes 3D are alternately formed in each flange 3A at intervals of 90 degrees in the circumferential direction. Like the first disc 2, the second disc (not shown) is made of, for example, a metal leaf spring, has a central hole, and is formed with holes for passing four reamer bolts in the circumferential direction. There is. Like the first hub 1, the second hub (not shown) is composed of a flange and a boss, and the reamer bolt insertion hole and the through hole are formed in the flange in the circumferential direction.
They are formed alternately at intervals of 0 degree, and the boss is provided with a shaft hole, a key groove, and a set screw with a hole. The first thrust plate 4 is fixed to the first hub 1 with four hexagon socket head cap screws 7. The second thrust plate 5 is also fixed to the spacer 3 with four hexagon socket head cap screws 7. One end (lower end) of the protrusion 6 as a thrust load transmitting member has a hemispherical shape, and the other end (upper end) is attached to the second thrust plate 5 fixed to the spacer 3 by welding or the like. There is.

The first disk 2 is mounted between the first hub 1 and the spacer 3 with a predetermined space by a reamer bolt 8, a pressing ring 9, a washer 10 and a nut 11. The second disk (not shown) is mounted between the second hub (not shown) and the spacer 3 with a predetermined space by a reamer bolt (not shown), a holding ring, a washer, and a nut. A shaft hole 1E of the first hub 1 is fitted into a key groove 1F by fitting a key into a shaft (not shown), and is fixed by a set screw with a hole 1G. Similarly, the shaft hole of the second hub (not shown) is fitted to the other shaft (not shown) by fitting the key into the key groove and fixed by the set screw with a hole.

Further, in this coupling, the hemispherical portion of one end (lower end) of the protrusion 6 as a thrust load transmitting member is in contact with the first thrust plate 4 attached to the first hub 1, As a result, the first thrust plate 4 attached to the first hub 1 supports the thrust load such as the weight of the spacer 3.

By the way, in this flexible coupling, as shown in FIG. 7, the hemispherical portion of the projection 6 and the flat surface of the first thrust plate 4 make contact with each other. The bearing surface pressure is high. Therefore, when a large thrust load is applied, there is a problem that the hemispherical portion of the protrusion 6 is crushed or the flat support portion of the first thrust plate 4 is dented.
When the hemispherical portion of the projection 6 is crushed, the hemispherical portion of the projection 6 becomes a flat surface, and the flat surface of the hemispherical portion of the projection 6 and the flat surface of the first thrust plate 4 as shown in FIG. Therefore, there is a problem that the deflection angle, which is one of the functions of the flexible coupling, cannot be absorbed.

[0007]

Therefore, the present invention solves the above-mentioned conventional problems and is capable of absorbing the declination even when subjected to a large thrust load such as its own weight. Furthermore, the first hub PROBLEM TO BE SOLVED: To provide a flexible coupling having a thrust load receiving function capable of adjusting a length up to a supporting portion of a flat ball set screw according to a distance between a spacer and a spacer or between a first hub and a second hub. The purpose is.

[0008]

In order to achieve the above object, the invention according to claim 1 connects a first hub and a second hub to both ends of a spacer via disks, respectively.
Thrust plates were attached to the opposing end surfaces of the spacer and the first hub, a thrust load transmitting member was attached to the thrust plate attached to the spacer, and the tip of the thrust load transmitting member was attached to the first hub. In a flexible coupling having a thrust load receiving function configured to be supported by a thrust plate, as the thrust load transmitting member, a sphere having a flat surface portion at one end is rotatably held and a tool engaging portion is provided at the other end. Using a set screw with a flat ball that is formed and has a screw on the outer circumference, screw the flat ball with a set screw to the thrust plate attached to the spacer,
The flat portion of the flat ball set screw is supported by a thrust plate attached to the first hub.

In order to achieve the above-mentioned object, the invention according to a second aspect is that the first hub and the second hub are connected via a disk, and the first hub and the second hub are opposed to each other. A thrust plate is attached to each of the end surfaces, a thrust load transmitting member is attached to the thrust plate attached to the second hub, and the tip of the thrust load transmitting member is supported by the thrust plate attached to the first hub. In the configured flexible coupling having a thrust load receiving function, as the thrust load transmitting member, a spherical body having a flat surface portion at one end is rotatably held, a tool engaging portion is formed at the other end, and a screw is provided on the outer periphery. Using a set screw with a flat ball having the above, the set screw with a flat ball is screwed and attached to a thrust plate attached to the second hub, The flat portion of the serial planes ball set screw is intended to support the thrust plate mounted to the first hub.

In order to achieve the above object, the invention according to claim 3 is the flexible coupling having the thrust load receiving function according to claim 1 or 2, wherein the flat ball set screw is provided on the spacer. The lock plate is fixed to the attached thrust plate or the thrust plate attached to the second hub.

[0011]

The invention according to claim 1 is, as a thrust load transmitting member, rotatably holding a sphere having a flat surface portion at one end and forming a tool engaging portion at the other end to form an outer periphery. Using a flat ball set screw with a screw, screw the flat ball set screw into the thrust plate attached to the spacer, and attach the flat part of the flat ball set screw to the first hub by the thrust plate. Even if a large thrust load such as the weight of the spacer is transmitted to the thrust plate attached to the first hub by the flat ball set screw, the flat portion of the spherical body of the flat ball set screw is Since it comes into surface contact with the thrust plate attached to the hub, the surface pressure does not increase unlike the conventional point contact type. Therefore, a large thrust load can be supported.
Further, since the sphere is held rotatably with respect to the flat ball set screw main body, the declination can be sufficiently absorbed. Furthermore, the set screw with a flat ball is screwed and attached to the thrust plate attached to the spacer, so the length of the set screw with a flat ball to the support section is adjusted according to the distance between the first hub and the spacer. can do.

According to a second aspect of the present invention, as the thrust load transmitting member, a spherical body having a flat surface portion at one end is rotatably held, a tool engaging portion is formed at the other end, and a flat surface having a screw on the outer periphery. Using a set screw with a ball, screw the flat set screw with a ball into the thrust plate attached to the second hub to attach the flat part of the flat set screw with a ball to the first position.
Since it is supported by the thrust plate attached to the hub, even if a large thrust load such as the weight of the second hub is transmitted to the thrust plate attached to the first hub by the set screw with the flat ball, The flat surface of the sphere of the set screw is in surface contact with the thrust plate attached to the first hub, so that the surface pressure does not increase unlike the conventional point contact type. Therefore, a large thrust load can be supported. Further, since the sphere is held rotatably with respect to the flat ball set screw main body, the declination can be sufficiently absorbed. Further, since the set screw with the flat ball is screwed and attached to the thrust plate attached to the second hub, the support portion of the set screw with the flat ball is adjusted in accordance with the distance between the first hub and the second hub. You can adjust the length up to.

According to the third aspect of the present invention, the flat ball set screw is fixed to the thrust plate attached to the spacer or the thrust plate attached to the second hub with the lock nut. It is possible to prevent the set screw with balls from loosening.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a flexible coupling having a thrust load receiving function according to the invention of claim 1 and is a longitudinal sectional view taken along the line 1-1 of FIG. Figure 1
As shown in FIG. 1, this flexible coupling is roughly composed of a first hub 20, a first disk 21, a spacer 22, a second disk 23, a second hub 24, and
As a first thrust plate 25 attached to the first hub 20, a second thrust plate 26 attached to the spacer 22, and a thrust load transmission member screwed and attached to the second thrust plate 26. The set screw 27 with a flat ball and the lock nut 28 screwed to the set screw 27 with a flat ball are attached.

More specifically, the first hub 20
Is composed of a flange 20A and a boss 20B,
Reamer bolt insertion holes 20C and through holes 20D are alternately formed in the flange 20A at intervals of 90 degrees in the circumferential direction,
The boss 20B is provided with a shaft hole 20E, a key groove 20F, and a set screw 20G with a hole. The first disk 21 is made of, for example, a metal leaf spring, has a center hole 21A, and is formed with holes for passing four reamer bolts 30 in the circumferential direction. The spacer 22 is the flange 2
2A and a pair of members having a boss 22B are connected by a hollow shaft member. Reamer bolt insertion holes 22C and through holes 22D are alternately formed in each flange 22A at intervals of 90 degrees in the circumferential direction. . The second disk 23 is the first
Like the disk 21 of FIG. 3, it is made of, for example, a metal leaf spring, has a central hole 23A, and has a circumference of 4 mm.
A hole for passing the individual reamer bolt 30 is formed. Similar to the first hub 20, the second hub 24 is composed of a flange 24A and a boss 24B, and the reamer bolt insertion hole 24C and the through hole 24D are arranged in the flange 24A at intervals of 90 degrees in the circumferential direction. Alternately formed by the boss 24
B has a shaft hole 24E, a key groove 24F, and a set screw 24G with a hole. In this embodiment, the first thrust plate 25 includes four hexagon socket head bolts 29 attached to the first hub 20.
However, it may be formed integrally with the first hub 20. The second thrust plate 26 is also fixed to the spacer 22 by the four hexagon socket head cap screws 29 in this embodiment, but may be formed integrally with the spacer 22. As shown in FIGS. 4 (A) and 4 (B), a flat ball set screw 27 as a thrust load transmitting member has a sphere 27B rotatably holding a flat portion 27A at one end (lower end) thereof. A tool engaging portion 27C for engaging a tool such as a hexagon wrench is formed at the other end portion (upper end portion), and has a screw 27D on the outer circumference. The flat ball set screw 27 is screwed and attached to the second thrust plate 26 attached to the spacer 22 by using a tool such as a hexagon wrench. The lock nut 28 is used to prevent the set screw 27 with a flat ball from loosening.

The first disk 21 is a reamer bolt 30.
The press ring 31, the washer 32, and the nut 33 are attached between the first hub 20 and the spacer 22 with a predetermined space. The second disk 23 is attached between the second hub 24 and the spacer 22 with a predetermined space by the reamer bolt 30, the pressing ring 31, the washer 32, and the nut 33. In addition, although the reamer bolt 30, the pressing ring 31, the washer 32, and the nut 33 are each eight in number, the number of each of them is not limited to eight. A shaft hole 20E of the first hub 20 is fitted into a key groove 20F by fitting a key into a shaft (not shown), and is fixed by a set screw 20G with a hole. Similarly, the shaft hole 24E of the second hub 24 is provided with the key groove 24F on the other shaft (not shown).
Is fitted with a key and is fixed by a set screw with a hole 24G. For the method of connecting the shaft and hub, instead of the method of using the key and the set screw with holes, a method of press-fitting a cylindrical taper sleeve between the shaft and the hub with a screw, a method of using an end plate, etc. are used. can do.

In this coupling, a set screw 27 with a flat ball is attached by screwing it to a second thrust plate 26 attached to the spacer 22 by using a tool such as a hexagon wrench, and a flat nut is attached by a lock nut 28. The set screw 27 is prevented from loosening. The flat portion 27A of the spherical body 27B, which is rotatably held at one end of the flat ball set screw 27, is in contact with the first thrust plate 25 attached to the first hub 20. First thrust plate 2 attached to hub 20
5 supports a thrust load such as the weight of the spacer 22.

Since the coupling of the above-mentioned embodiment has the above-mentioned structure, a large thrust load such as the self-weight of the spacer 22 is applied to the first thrust plate 25 attached to the first hub 20 by the flat ball set screw 27. Even after being transmitted, the flat surface portion 27A of the spherical body 27B of the flat ball set screw 27 contacts the first thrust plate 25 attached to the first hub 20, and is in surface contact as shown in FIG. The surface pressure does not increase unlike the conventional point contact type. Therefore, a large thrust load can be supported. Further, since the spherical body 27B is rotatably held with respect to the main body of the set screw 27 with a flat ball, the declination can be sufficiently absorbed. Further, since the set screw 27 with the flat ball is screwed and attached to the second thrust plate 26 attached to the spacer 22, the set screw 27 with the flat ball is set in accordance with the distance between the first hub 20 and the spacer 22. It is possible to adjust the length up to the supporting portion of the flat nut, and the lock nut 28 can also prevent the set screw 27 with a flat ball from loosening.

Further, in the above embodiment, FIG.
Instead of the flat ball set screw 27 shown in FIGS. 5A and 5B, a flat ball set screw 27 'with an inversion prevention mechanism shown in FIGS. 5A and 5B can be used. 5A and 5B has a flat ball set screw 27 'with an inversion prevention mechanism, a tool engaging portion 27'C with which a tool such as a hexagon wrench engages with the other end (upper end). 4 in that it is formed and has threads 27'D on its outer circumference.
This is the same as the flat ball set screw 27 shown in (A) and (B), but the spherical body 27'B and the way of holding the spherical body 27'B are different. That is, a pair of flat surface portions 27'A and 27'A are formed on the spherical body 27'B so as to face each other. In the spherical body 27'B, one flat surface portion 27'A has one end portion (lower end portion) of the main body. ), And the other flat surface portion 27'A is held by the main body so as to face the bottom portion 27'E of the main body via the space portion 27'F. Set screw with flat ball 27 'with inversion prevention mechanism shown in FIGS. 5 (A) and 5 (B)
Has the above-mentioned configuration, the sphere 27'B is rotatably held within a predetermined range, and one flat surface portion 27'A is always exposed at one end (lower end) of the main body. The sphere 27'B is prevented from reversing.

In the above embodiment, as shown in FIG.
In place of the flat ball set screw 27 shown in FIG.
When the flat ball set screw 27 'with the inversion prevention mechanism shown in FIGS. 4A and 4B is used, the same effect as when the flat ball set screw 27 shown in FIGS. 4A and 4B is used is obtained. And also has the following effects. That is, the set screw with flat ball 27 ′ with the inversion prevention mechanism shown in FIGS. 5A and 5B is always one flat portion 27 ′.
Since A is exposed at one end (lower end) of the main body, one flat surface 27′A is attached to one end (lower end) of the main body during or after mounting of the set screw 27 ′ with a flat ball having an inversion prevention mechanism. It is easy to use because it is not necessary to check whether or not it is exposed to the area. The invention described in claim 1 is not limited to the one described in the embodiment.

FIG. 6 is a longitudinal sectional view corresponding to FIG. 1, showing an embodiment of a flexible coupling having a thrust load receiving function according to the invention described in claim 2. Figure 6
As shown in FIG. 2, this flexible coupling is roughly composed of the first hub 20, the disk 40, and the second hub 2.
4, the first thrust plate 25 attached to the first hub 20, the second thrust plate 26 attached to the second hub 24, and the second thrust plate 26 by screwing. Further, a set screw 27 with a flat ball serving as a thrust load transmitting member and a lock nut 28 screwed to and attached to the set screw 27 with a flat ball are provided.

More specifically, the first hub 20
Is composed of a flange 20A and a boss 20B,
Reamer bolt insertion holes 20C and through holes 20D are alternately formed in the flange 20A at intervals of 90 degrees in the circumferential direction,
The boss 20B is provided with a shaft hole 20E, a key groove 20F, and a set screw 20G with a hole. The disk 40 is made of, for example, a metal leaf spring, has a central hole 40A, and is formed with holes for passing four reamer bolts 30 in the circumferential direction. The second hub 24 is the first hub 20.
Similarly, a flange 24A and a boss 24B are formed, and a reamer bolt insertion hole 24C and a through hole 24D are alternately formed in the flange 24A at intervals of 90 degrees in the circumferential direction, and the boss 24B has a shaft hole. 24E, a key groove 24F, and a set screw 24G with a hole are provided. Although the first thrust plate 25 is fixed to the first hub 20 with four hexagon socket head cap screws 29 in this embodiment, the first thrust plate 25 may be formed integrally with the first hub 20. The second thrust plate 26 is also fixed to the second hub 24 with four hexagon socket head cap bolts 29 in this embodiment, but may be formed integrally with the second hub 24. In this embodiment, the same set screw 27 with a flat ball as the thrust load transmitting member is the same as that used in the previous embodiment. That is, this flat ball set screw 27 is
As shown in (B), the flat portion 27A is provided at one end (lower end).
Is held rotatably, a tool engaging portion 27C with which a tool such as a hexagon wrench is engaged is formed at the other end (upper end), and a screw 27D is provided on the outer periphery. The flat ball set screw 27 is screwed and attached to the second thrust plate 26 attached to the second hub 24 by using a tool such as a hexagon wrench. The lock nut 28 is used to prevent the set screw 27 with a flat ball from loosening.

The disk 40 is mounted between the first hub 20 and the second hub 24 with a predetermined space by the reamer bolt 30, the pressing ring 31, the washer 32 and the nut 33. Reamer bolt 30 and presser ring 31
Four washers 32 and nuts 33 are used, but the number of these is not limited to four. Further, a shaft hole 20E of the first hub 20 is provided on a shaft (not shown).
Is fitted into the key groove 20F by fitting the key, and the set screw with hole 2
Fixed by 0G. Similarly, the shaft hole 24E of the second hub 24 is fitted into the key groove 24F by fitting a key into another shaft (not shown), and is fixed by the set screw 24G with a hole. In addition, as a method of connecting the shaft and the hub, a method of press-fitting a cylindrical taper ring between the shaft and the hub with a screw, a method of using an end plate, or the like is used instead of the method using the key and the set screw with a hole. be able to.

In this coupling, a set screw 27 with a flat ball is screwed and attached to a second thrust plate 26 attached to the second hub 24 using a tool such as a hexagon wrench, and a lock nut 28 is used. This prevents the set screw 27 with a flat ball from loosening. The flat portion 27A of the spherical body 27B, which is rotatably held at one end of the flat ball set screw 27, is in contact with the first thrust plate 25 attached to the first hub 20. A first thrust plate 25 attached to the hub 20 supports a thrust load such as its own weight of the second hub 24.

Since the coupling of the above-mentioned embodiment has the above-mentioned structure, a large thrust load such as the self-weight of the second hub 24 is attached to the first hub 20 by the flat ball set screw 27. Even if it is transmitted to the plate 25, the flat surface portion 27A of the spherical body 27B of the flat ball set screw 27 comes into contact with the first thrust plate 25 attached to the first hub 20 to form a surface contact, which is a conventional point contact. The surface pressure does not become high unlike the ones. Therefore, a large thrust load can be supported. Further, since the spherical body 27B is rotatably held with respect to the main body of the set screw 27 with a flat ball, the declination can be sufficiently absorbed. Furthermore, since the flat ball set screw 27 is screwed and attached to the second thrust plate 26 attached to the second hub 24, the first hub 20 and the second hub
It is possible to adjust the length of the flat ball set screw 27 up to the supporting portion according to the distance between the hubs 24, and the lock nut 28 can prevent the flat ball set screw 27 from loosening.

Also, in the above embodiment, as in the embodiment of the flexible coupling having the thrust load receiving function of the invention described in claim 1, FIGS. 4 (A) and 4 (B) are used.
In place of the flat ball set screw 27 shown in FIG.
It is possible to use the flat ball set screw 27 'with the inversion prevention mechanism shown in FIGS. Figure 5
The effect of using the flat ball set screw 27 'with the inversion prevention mechanism shown in (A) and (B) is also the same as that of the embodiment of the flexible coupling having the thrust load receiving function of the invention according to claim 1. It is similar to the case. The invention described in claim 2 is not limited to the one described in the embodiment.

[0027]

According to the invention described in claims 1 and 2, the following effects are obtained. (1) Since the flat portion of the set screw with a flat ball and the support portion of the thrust plate are flat surfaces, a large thrust load can be applied. (2)
Since the spherical body having the flat surface portion is rotatably held by the flat ball set screw, the deviation angle can be absorbed.
(3) Since the set screw with a flat ball is screwed and attached to the thrust plate, the set screw with a flat ball can be fitted to the space between the first hub and the spacer or between the first hub and the second hub. The length to the support can be adjusted.

According to the invention described in claim 3, in addition to the effects described in the above (1) to (3), (4) the thrust plate with the flat ball set screw attached to the spacer or the above. Since the lock plate is fixed to the thrust plate attached to the second hub, it is possible to prevent the flat ball set screw from loosening.

[Brief description of drawings]

1 shows an embodiment of a flexible coupling having a thrust load receiving function of the invention according to claim 1, and is a longitudinal sectional view taken along the line 1-1 of FIG.

FIG. 2 is a bottom view of the flexible coupling shown in FIG.

FIG. 3 is an enlarged view of a portion surrounded by an ellipse in FIG.

4A and 4B show a set screw with a flat ball used in the embodiment, FIG. 4A being a front view and FIG. 4B being a vertical sectional view.

FIG. 5 shows a set screw with a flat ball having an inversion prevention mechanism used in the embodiment, (A) is a front view,
(B) is a longitudinal sectional view.

FIG. 6 is a longitudinal sectional view corresponding to FIG. 1, showing an embodiment of a flexible coupling having a thrust load receiving function of the invention according to claim 2;

7 is a vertical sectional view corresponding to FIG. 1, showing a lower half of a conventional flexible coupling having a thrust load receiving function.

8 is a longitudinal sectional view corresponding to FIG. 1, showing a deformed hemispherical portion of a protrusion of the flexible coupling shown in FIG.

[Explanation of symbols]

20: First hub 20A: Flange 20B: Boss 20C: Reamer bolt insertion hole 20D: Through hole 20E: Shaft hole 20F: Key groove 20G: Set screw with hole 21: First disk 21A: Center hole 22: Spacer 22A: Flange 22B: Boss 22C: Reamer bolt insertion hole 22D: Through hole 23: Second disk 23A: Center hole 24: Second hub 24A: Flange 24B: Boss 24C: Reamer bolt insertion hole 24D: Through hole 24E: Shaft hole 24F: Key groove 24G: Set screw with hole 25: First thrust plate 26: Second thrust plate 27: Set screw with flat ball 27A: Flat portion 27B: Sphere 27C: Tool engaging portion 27D: Male screw 27 ': Inversion Set screw with flat ball with prevention mechanism 27'A: Flat portion 27'B: Sphere 27'C: Tool engagement part 27'D: Male screw 27'E: Bottom part 27'F: Space part 28: Lock nut 29: Hexagon socket head bolt 30: Reamer bolt 31: Presser ring 32: Washer 33: Nut 40: Disc 40A: Center Hole

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-313440 (JP, A) JP-A-8-232976 (JP, A) Actual exploitation Sho-57-134425 (JP, U) Actual exploitation 4- 90730 (JP, U) Actually open Sho-2242 (JP, U) Actually open 64-3129 (JP, U) Special Table 8-506163 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16D 3/50-3/79 F16D 3/12

Claims (3)

(57) [Claims] 1. A first hub and a second hub are connected to both ends of a spacer through a disk, and thrust plates are attached to opposite end surfaces of the spacer and the first hub, and the spacer is attached to the spacer. A flexible coupling having a thrust load receiving function, wherein the thrust load transmitting member is attached to the thrust plate, and the tip of the thrust load transmitting member is supported by the thrust plate attached to the first hub. As the transmitting member, a flat ball set screw having a flat portion at one end is rotatably held, a tool engaging portion is formed at the other end, and a screw is provided on the outer circumference. Is mounted by screwing it onto the thrust plate attached to the spacer, and the flat surface of the flat ball set screw A flexible coupling having a thrust load receiving function, wherein the portion is supported by a thrust plate attached to the first hub. 2. A first hub and a second hub are connected via a disc, and thrust plates are attached to the end faces of the first hub and the second hub which face each other, and
In a flexible coupling having a thrust load receiving function, a thrust load transmitting member is attached to a thrust plate attached to the hub, and the tip of the thrust load transmitting member is supported by the thrust plate attached to the first hub. As the thrust load transmitting member, a flat ball set screw having a spherical portion having a flat surface portion at one end rotatably and a tool engaging portion formed at the other end and having a screw on the outer periphery is used. The set screw with a ball is screwed and attached to a thrust plate attached to the second hub, and the flat surface portion of the set screw with a flat ball is supported by the thrust plate attached to the first hub. Flexible coupling with thrust load receiving function. 3. The set screw with a flat ball is fixed to a thrust plate attached to the spacer or a thrust plate attached to the second hub with a lock nut. Flexible coupling with thrust load receiving function.