JP2673199B2 - Rotary shaft connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a connection structure of a rotating shaft.

<Prior Art> In a household electrical appliance, an industrial machine tool, or a transportation machine such as a vehicle, the connection structure shown in FIG. 28 is seen as a means for connecting one rotating shaft transmitting a rotating force to another rotating shaft. Was given. The first rotating shaft (1) receives a rotating force from an electric motor or the like and supplies the rotating force to another, and the first rotating shaft (1).
To the second rotating shaft (2) which receives the supply of rotational force, a first connecting member (10) provided at the tip of the first rotating shaft and made of plastic or the like, and to the rear end of the second rotating shaft (2). A second provided, made of plastic or the like
It is constituted by the connection member (20).

A plurality of claws (11) are formed at the tip (upper part in the figure) of the first connection member (10), and the claws (11) protrude forward (upper part in the figure). Similarly, a plurality of claws (12) are formed at the rear end (the lower part in the figure) of the second connection member (20), and the claws (12) are formed.
Project rearward (downward in the figure). Each nail (11)
(12) has a rake face (11 ') (1
2 ') is formed (vertically in the figure). The rake faces (11 ') and (12') mesh with each other when the first connecting member (10) and the second connecting member (20) are connected to each other to transmit the rotational force (Fig. 29).

<Problems to be Solved by the Invention> However, in such a conventional connection structure, the first rotating shaft (1) and the second rotating shaft (2) are not arranged on the same straight line,
When the first connecting member (10) and the second connecting member (20) are engaged with each other with a shift, the first rotating shaft (1) to the second rotating shaft (20)
The proper rotation force is not transmitted to.

There are two possible patterns of such a shift. One is the one in which the first rotary shaft (1) and the second rotary shaft (2) are displaced while remaining parallel to each other as shown in FIG. 30, and the other one is
As shown in FIG. 31, the first rotating shaft (1) and the second rotating shaft (2) are not parallel to each other and are displaced in a twisted state. It includes not only the positional relationship but also the fact that the extension lines of both rotating shafts "intersect" at an angle other than 180 degrees).

In addition to the above, a connection structure using a connection member made of plastic or the like generates a large amount of noise due to high speed or improper rotation of the motor. Further, a problem often arises that the rake faces (11 ') and (12') are fused together by ultrasonic fusion.

 The present invention aims to solve the above problems.

<Means for Solving the Problems> The present invention provides a first rotating shaft (1) and a first rotating shaft (1).
Of the first connecting member (10) provided at the tip of the second connecting member (20) whose rear end engages with the tip of the first connecting member (10), and the second connecting member (20). A second rotating shaft (2) provided at the tip, and an appropriate number of claws (11) are provided at the leading end of the first connecting member (10) along the circumferential direction of the rotating shaft to form the second connecting shaft. An appropriate number of claws (12) are arranged at the rear end of the member (20) along the circumferential direction of the rotary shaft, and the claws (11) (12) are provided.
Are adjacent to the rake face (11 ') (12') and the rake face (11 ') (12') extending from the top of the claws (11) (12) to the base substantially parallel to the axial direction of the rotating shaft. It has a substantially mountain shape defined by the slope connecting the bottom of the matching claw (11) and the rake face (11 'of the claws (11) (12) of the first and second connecting members (10) (20). ) (12 ') mesh with each other, whereby the rotation of the first rotating shaft (1) causes the rotation of the first and second connecting members (10) (20).
The above problem is solved by providing a rotating shaft connecting structure that is transmitted to the second rotating shaft (2) through the following structure.

In the rotating shaft connecting structure according to the first invention of the present application, at least one connecting member (10) of the first and second connecting members (10) (20) is a center directly connected to the rotating shaft (1). A part (13) and an annular part (14) arranged outside the central part (13) with a space therebetween. A plurality of plate-shaped cushioning members (30) are provided between the outer peripheral surface of the central portion (13) and the inner peripheral surface of the annular portion (14). These cushioning members (30)
Is arranged with a space between the cushioning members (30) adjacent to each other, and is expandable / contractible in the radial direction of the rotary shaft, and can be bent / extended in the axial direction of the rotary shaft. Axis (1)
And the second rotary shaft (2) are displaced in parallel, the cushioning member (3
0) expands and contracts in the radial direction of the rotating shaft, and the buffer member (30) expands and contracts in the radial direction of the rotating shaft when the first rotating shaft (1) and the second rotating shaft (2) are displaced in a twisted relationship. Along with this, it is characterized by bending and extending in the axial direction of the rotating shaft.

In the rotating shaft connecting structure according to the second invention of the present application,
At least one of the first and second connecting members (10) (20) has a central portion (13) directly connected to the rotating shaft (1) and an outside of the central portion (13). And an annular portion (14) arranged at intervals. A plurality of ring-shaped cushioning members (30) are provided between the outer peripheral surface of the central portion (13) and the inner peripheral surface of the annular portion (14). These cushioning members (30) are arranged with a space between the cushioning members (30) adjacent to each other, are expandable and contractible in the radial direction of the rotating shaft, and are bent and extended in the axial direction of the rotating shaft. It is possible, and when the first rotary shaft (1) and the second rotary shaft (2) are displaced in parallel, the buffer member (30) expands and contracts in the radial direction of the rotary shaft, and the first rotary shaft (1)
The buffer member (30) expands and contracts in the radial direction of the rotary shaft and bends and extends in the axial direction of the rotary shaft when the second rotary shaft (2) and the second rotary shaft (2) shift in a twist relationship.

When carrying out the rotating shaft connecting structure according to the first or second invention, the first and second both connecting members (10) are used.
An elastically deformable flexible part (40) and a hollow part (50) for absorbing deformation of the flexible part are provided side by side on the rake face of at least one of the claws (11) of the (20). It can be carried out. Also, the first and second connecting members (10) (20)
It is also possible to provide the elastic body (60) on the rake face of at least one of the claws (11).

<Operation> In the present invention using the above means, in either or both of the first connecting member and the second connecting member, the central portion on the rotating shaft side and the annular portion on the claw side are interposed via the cushioning member. Since the rotation axis is connected, the displacement of the rotating shaft (the displacement between the first rotating shaft and the second rotating shaft in parallel or the twist) is buffered by the flexure of the buffering portion, and the engagement of the claws is affected by the displacement. Not brought in.

In addition to the above effects, when the first connecting member and the second connecting member are connected, and when the claws of both connecting members are engaged and rotate, only the flexible member is deformed, and a part that is bent due to this deformation is additionally provided. The hollow portion thus absorbed absorbs.

Due to the deformation of the flexible member, noise is buffered and ultrasonic fusion does not occur.

In addition to the above action, when the first connecting member and the second connecting member are connected and the claws of both connecting members are engaged and rotate, only the elastic body is deformed.

The interposition of the elastic body buffers noise and does not cause ultrasonic fusion.

<Example> An example of the present invention will be described below with reference to the drawings.

The configuration of the present invention is implemented in the connection structure described in the section of the related art. That is, a first rotating shaft (1) that receives a rotating force from an electric motor or the like and supplies this rotating force to another, and a second rotating shaft (2) that receives a rotating force from the first rotating shaft (1).
A first connecting member (10) provided on the tip of the first rotating shaft and formed of plastic or the like; and a second connecting member (10) formed on the rear end of the second rotating shaft (2) and formed of plastic or the like ( 20) The present invention, which will be described later, is embodied in the connection structure (Fig. 28) constituted by and. As described above, a plurality of claws (11) are formed at the tip (upper part in FIG. 28) of the first connecting member (10), and the claws (11) project forward (upward in FIG. 28). There is. Similarly, a plurality of claws (12) are formed at the rear end (lower part in FIG. 28) of the second connecting member (20), and the claws (12) project rearward (downward in FIG. 28). Each claw (11) (12) is formed with a rake face (11 ') (12') for engaging with each other (vertical in FIG. 28). These rake faces (11 ') (12') mesh with each other when the first connecting member (10) and the second connecting member (20) are connected,
It transmits the rotational force (Fig. 29). The nails (12)
Regarding the direction of, it can be carried out either clockwise in a plan view or counterclockwise. However, both the claws of the first connecting member (10) and the second connecting member (20) need to be formed in the same direction (rotation).

 Next, the main configuration of the present invention will be described.

First, the configuration around the buffer member, which is the center of the present invention, will be described with reference to FIG.

Hereinafter, description will be made assuming that a cushioning member (30) described below is provided on the first connecting member (10) side, but this cushioning member (30) may be provided on the second connecting member (20) side,
It can also be implemented if it is provided on both the first connecting member (10) and the second connecting member (20). This also applies to other embodiments described later.

The first connecting member (10) is located at a fixed interval from the central portion (13) fixed to the tip of the first rotating shaft (1) and surrounds the periphery of the central portion (13). And an annular portion (14).

Between the outer peripheral surface of the central portion (13) and the inner peripheral surface of the buffer portion (14),
A buffer member (30) is interposed which is appropriately deformed when a force is applied and returns to its original shape when the force is removed.

Each of the claws (11) described in FIGS. 28 and 29 has the tip of the annular portion (14) (annular portion (1 in FIG. 28 and FIG. 1).
4) Project from the upper surface). That is, the claw (11) has an annular portion (14).
It is provided to.

In the present embodiment, the above-mentioned cushioning member (30) is a plate-like member having a cross-section passage "V". An appropriate number of cushioning members (30) are interposed between the central portion (13) and the annular portion (14) (the number of cushioning members (30) is not limited to the illustrated number. For example, from 12 sheets shown in FIG. More or less may be implemented). FIG. 2 is a plan view of FIG.

When the first rotating shaft (1) and the second rotating shaft (2) are worn while keeping parallel to each other, the first connecting member (10) and the second connecting member (2
The friction with (0) is buffered by elastic deformation of the buffer member (30) as shown in FIG.

That is, one of the cushioning members (30) is compressed and the other cushioning member (30) is stretched.

FIG. 4 shows another embodiment of the buffer member (30). This is different from the one shown in FIGS. 1, 2 and 3 in that each cushioning member (30) is not bent in a V shape and is formed as a flat plate-like body. is there.

FIG. 5 shows another embodiment. This is a ring-shaped individual buffer member (30).

In this case, the ring formed by each cushioning member (30) may be a perfect circle, an ellipse, or an ellipse.

Incidentally, FIG. 6 shows a partially cutaway perspective view of the fifth embodiment.

FIG. 7 shows an embodiment for coping with the eccentricity shown in FIG.

This shows the operating state when the second rotary shaft (2) is tilted with respect to the first rotary shaft (1) as shown. First, the upper portion (32) of the buffer member (30) located near the side where the second rotating shaft (2) is inclined is compressed and bent downward. At the same time, the lower part (33) of the cushioning member (30) is extended. At this time, in the buffer member (30) 'located near the side opposite to the direction in which the second rotation shaft (2) is inclined, the upper part (32)' is extended and at the same time the lower part (33) 'is bent upward. Of. In the embodiment shown in FIGS. 1 to 6, the eccentricity shown in FIG. 31 is dealt with similarly to the expansion and contraction of the cushioning members (30) (30) 'shown in FIG. Incidentally, FIG. 6 shows a partially cutaway perspective view of the embodiment shown in FIG.

In the embodiment shown in FIG. 7, the cushioning member (30) was implemented on the side of the second connecting member (20), but on the side of the first connecting member (10) as in the previously described embodiments. The cushioning member (30) may be implemented. A buffer member (30) may be provided on both the first and second connecting members (10, 20).

An embodiment will be described below in consideration of reduction of noise during rotation and elimination of ultrasonic fusion in the inventions of FIGS. 1 to 7 described above.

FIG. 8 shows the claw (11) of the first connecting member (10) provided with the flexible portion (40) and the hollow portion (50).

That is, the claw (11) exhibits a vertical meshing surface (the above-mentioned rake surface) from the top to the base so as to mesh with the claw (12) of the second connecting member (20), and this is the flexible portion (40). Become. Further, inside the claw (11), a vertical hollow portion (50) is formed from the top to the base. Therefore, the hollow portion (50) is positioned so as to be included in the flexible portion (40).
The first connecting member (10) is entirely formed of plastic or the like having an appropriate hardness and elasticity to such an extent that its self-supporting property is not impaired.

The flexible portion (40) forms a thin portion due to the presence of the adjacent hollow portion (50). As a result, as shown in FIG. 9, the second connecting member (20) and the first connecting member (10)
When the claw (11) and the claw (12) 'are engaged with each other, the flexible part (40) bends due to the torque when the claw (11) and the claw (12)' mesh, and the hollow part (50)
Is crushed by this deformation. The flexible part (40) returns to its original position depending on whether the rotation is stopped and the torque is deenergized or the connection parts (10) (20) are separated.

FIG. 10 shows the first connecting member (10) and the second connecting member (20).
The connection state of is shown in a front view.

The notch (31) is formed in the base of the claw (11) so that the flexible portion (40) can be sufficiently flexed. Therefore, the hollow part (50) is cut from the top of the claw (11) to this cutout (31).
It is formed so as to penetrate therethrough.

FIG. 11 shows a plan view of the hollow portion (50).
In FIG. 11, the hollow portion (50) is shown to have an inner peripheral surface that is substantially a perfect circle in cross section, but it is not limited to a perfect circle and may be an ellipse or an ellipse. Alternatively, a polygonal shape can be used.

FIG. 12 and FIG. 13 show the enlarged structure near the hollow part (50) in FIG. FIG. 12 shows a state in which the claw (11) and the claw (12) are meshed with each other and no rotational force is applied. FIG. 13 shows a state in which the rotational force is applied.
As shown in FIG. 13, the hollow portion (50) is crushed and the flexible portion (40) is deformed.

FIG. 14 shows another embodiment. This is one in which the flexible portion (40) is formed flat, and the hollow portion (50) is also formed in a semi-circular shape in cross section accordingly. Claws in this example (12)
The rake face is formed in the shape of a ridge with the top (51) in the center.

FIG. 15 shows a state in which a rotational force is applied to the flexible portion (40) in FIG. 14, that is, a state in which the flexible portion (40) is deformed.

FIG. 16 shows another embodiment. This is the same as the embodiment shown in FIG. 12 with the notch (41). The notch is located at the center of the rake face formed by the flexible portion (40), and further makes the flexible portion (40) easily deformable.

FIG. 17 shows still another embodiment. This is because the flexible part (40) is retracted so that the hollow part (50) has a crescent-shaped cross section when no rotational force is applied, and the notch part (41) is placed in the center of the flexible part (40). It is provided.

In the case of the embodiment shown in FIG. 17, the rake face of the claw (12) also needs to be formed so as to have the top portion (220) (not shown).

FIG. 18 shows still another embodiment. This is a nail (11)
One leg of the flexible portion (40) having a substantially U-shape in plan view is fixed to the rake face of the other leg, and the other leg newly forms a rake face. In this case, between the legs of the U-shaped flexible part (40),
It becomes a hollow part (50). FIG. 19 shows a state in which the flexible portion (40) shown in FIG. 18 is bent by receiving the rotational force from the claw (11).

In the case of the embodiment of FIG. 18, a separate spring is fixed as the flexible portion (40), but in this case, it is integrally formed with the claw (11) as in the case of the previously described embodiments. However, it can be implemented.

FIG. 20 shows another embodiment. This is one in which an appropriate number of protrusions are projected from the rake face of the claw (11), and these protrusions are used as the flexible portion (40). In this example,
The hollow portion (50), that is, the portion that receives the deformation of the flexible portion (40) is between the protruding flexible portions (40), and the flexible portion (40) is subjected to the rotational force as shown in FIG. It will bend.

Each of the examples of the flexible portion (40) and the hollow portion (50) shown in FIGS. 12 to 21 has been described as viewed from the same direction as FIG. 11, that is, in a plan view. However, unlike this case, it is possible to carry out the example shown in FIGS. 12 to 21 as viewed from the direction shown in FIG. 10, that is, as viewed from the front. In this case, the hollow portion (50) penetrates between both side surfaces of the claw (11). Similar to the embodiment shown in FIG. 18, in the embodiment shown in FIGS. 12 to 17 and 20 as well, the flexible portion and its vicinity are formed of a separate material such as a metal strip and attached to the connecting member. Good. In this case, by forming the portion shown by the spots in the embodiment of FIG. 12 with a different material, similarly, the embodiment of FIGS. 14 to 17 and 20 may also be formed of this material with another material. .

In each of the above embodiments, the flexible part (40) and the hollow part (5
0) has been described with reference to the example formed on the claw (11) of the first connection member (10), but the flexible portion (40) and the hollow portion (50)
May be formed on the second connecting member (20) or both connecting members (10) (20).

Another embodiment of the present invention, which corresponds to the eccentricity of the rotating shaft, will be described below in which a configuration for eliminating noise and ultrasonic fusion during rotation is added.

As shown in FIG. 22, the elastic body (60) is provided on the rake face (11) 'of the first connecting member (10) which meshes with the claw (12) of the second connecting member (20).

The first connecting member (10) is entirely formed of a plastic, a metal strip or other material having an appropriate hardness and elasticity so as not to impair its self-supporting property.

As shown in FIG. 23, when the second connection member (20) and the first connection member (10) are connected and the claw (11) and the claw (12) are engaged with each other, torque is applied to the elastic body (60). ) Buffers this.

As described above, the elastic body (60) is provided on an appropriate number of claws (11) protruding from the upper surface of the connection member (10). The nails (11)
As described above, in order to mesh with the claw (12) of the second connecting member (20), a vertical meshing surface (rake surface) (11) 'is provided from the top to the base. An elastic body (60) is provided on the claw (11) so as to cover this surface (11) '. Therefore,
The elastic body (60) is formed in a rectangular shape here according to the shape of the surface (11) '.

The elastic body (60) is made of a material having appropriate elasticity such as rubber, urethane, soft plastic, or metal strip.

A plan view of the first connecting member (10) is shown in FIG.
In the embodiments shown in FIGS. 22, 23 and 24, the elastic body (60) has been described by exemplifying the one in which the surface (11) 'is completely covered. Anything interposed between the ′ and the face (12) ′ satisfies the essential condition of the present invention. Therefore, it is not necessary to cover the entire surface (11) ', and unlike the one shown in FIG. 22, it covers a part of the surface (11)' and projects from a part of the surface (11) '. Can also be implemented.

The elastic body (60) is fixed by using an appropriate adhesive material according to its material.

Another embodiment of the elastic body (60) will be described below.

In the embodiment shown in FIG. 25, the surface (11) 'of each claw (11) is provided with a groove (61) whose inner peripheral surface is C-shaped in cross section. An elastic body (60) formed in a cylindrical shape is fitted into this.

After the elastic body (60) is mounted in the groove (61), a part of its peripheral surface is exposed from the surface (11) '.

FIG. 26 shows another embodiment. This is an elastic body (60)
The projections (60) 'are formed on the surface of the. In this embodiment, the main body of the elastic body (60) is completely embedded in the claw (11) ', and only the protrusion (60)' projects from the surface (11) '. The body is formed with a hole (61) 'which is shaped to be received.

FIG. 27 shows still another embodiment. This is one in which an appropriate number of projections (60) ″ are further provided on the elastic body (60) shown in FIG. 24. In this case, the main body of the elastic body (60) is embedded in the claw (11). If so, it is the same as that in FIG.

In the above embodiment, the elastic body (60) is provided on the claw (11) of the first connecting member (10), but the elastic body (60) is provided on the second connecting member (20). Well, again
It may be provided to both connection members (10) (20).

Further, although the embodiment shown in FIGS. 8 to 27 has been disclosed as having the cushioning member (30) shown in FIGS. 1 to 3, it is not limited to this structure, 7th
The cushioning member (30) shown may be implemented in the embodiments shown in FIGS. 8 to 27.

In each embodiment, the number of the claws (11) and (12) is four, but the number of the claws (11) and (12) ′ is not limited to four, and four or more claws (11) and (12) are provided. It is also possible to implement the following.

The present application can be implemented in various household electrical appliances, industrial machinery, transportation machines, and the like.

<Effect> The first rotating shaft (1) and the second rotating shaft (2) are eccentric,
Even if the connecting members (10) (20) are slightly displaced, the rotational force can be reliably transmitted.

In addition to the inability to transmit the rotational force due to the above deviation, noise and ultrasonic fusion caused thereby are eliminated.

In the same manner as described above, the inability to transmit the rotational force due to the deviation and the noise and ultrasonic fusion caused thereby are eliminated.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, and FIG. 2 is a plan view of the relevant portion. FIG. 3 is a main part plan view showing the operation of the embodiment shown in FIGS. 1 and 2. 4th
The drawing is a plan view of a main portion showing another embodiment. FIG. 5 is a plan view of an essential part showing still another embodiment.
The figure is a partially cutaway perspective view of the embodiment of FIG. FIG. 7 is a partially cutaway front view showing still another embodiment. FIG. 8 is a perspective view showing another embodiment of the claw, and FIG. 9 is a perspective view showing the connected state. FIG. 10 is a front view of the essential portions of the embodiment shown in FIG.
FIG. 11 is a plan view of the main part. FIG. 12 is an explanatory view of a main part of the claw (11) shown in FIG.
The figure is an explanatory view of the main parts showing its operating state. FIG. 14 is an explanatory view of main parts showing another embodiment of the claw (11),
FIG. 15 is a main part explanatory view showing the operating state thereof. FIG. 16 is a main part explanatory view showing the claw (11) and another embodiment, and FIG. 17 is a main part explanatory view showing the claw (11), still another embodiment. FIG. 19 is an explanatory view of essential parts showing an operating state of the embodiment shown in FIG. FIG. 20 is an explanatory view of a main part showing another embodiment of the claw (11), and FIG. 21 is an explanatory view showing its operating state. FIG. 22 is an overall perspective view showing an embodiment in which the elastic body (60) is provided on the claw (11), and FIG. 23 is an overall perspective view showing the connected state. FIG. 24 is a plan view of essential parts of the embodiment shown in FIG. FIG. 25 is an explanatory view showing another embodiment of the elastic body (60), and FIG. 26 is an explanatory view showing another embodiment of the elastic body (60). FIG. 27 is an explanatory view showing still another embodiment of the elastic body (60). FIG. 28 is an overall perspective view of the conventional example and the embodiment shown in FIG. 1, and FIG. 29 is an overall perspective view showing the connected state. FIG. 30 is an explanatory view showing problems of the conventional example, and FIG. 31 is an explanatory view showing other problems of the conventional example. (1) …… First rotation axis, (2) …… Second rotation axis, (10)
...... First connection member, (20) …… Second connection member, (11)
(12) …… nail, (13) …… central part, (14) …… annular part,
(30) …… Cushioning member.

Claims (2)

(57) [Claims] 1. A first rotating shaft (1), a first connecting member (10) provided at a tip of the first rotating shaft (1), and a rear end of the first connecting member (10) with respect to a tip thereof. The second connecting member (20) engaged with the second connecting member (20) and the second connecting member (20)
A rotary shaft (2), and an appropriate number of claws (11) are arranged at the tip of the first connecting member (10) along the circumferential direction of the rotary shaft,
An appropriate number of claws (12) are arranged at the rear end of the second connection member (20) along the circumferential direction of the rotary shaft, and each claw (11) (12) is connected to the claws (11) (12). Connect the rake face (11 ') (12') extending from the top to the base approximately parallel to the axial direction of the rotating shaft and the top of the rake face (11 ') (12') to the bottom of the adjacent claw (11). It has a substantially mountain shape defined by the slope and the rake face (1) of the claws (11) (12) of the first and second connecting members (10) (20).
The rotation of the first rotary shaft (1) is transmitted to the second rotary shaft (2) through the first and second connecting members (10) and (20) by meshing the 1 ') and (12') with each other. In the rotary shaft connecting structure, at least one of the first and second connecting members (10) (20) has a central portion (13) directly connected to the rotary shaft (1), An annular part (14) arranged at intervals outside the central part (13), and a plurality of parts are provided between the outer peripheral surface of the central part (13) and the inner peripheral surface of the annular part (14). The plate-shaped cushioning members (30) are passed over, and these cushioning members (30) are arranged with a space between adjacent cushioning members (30) and expand and contract in the radial direction of the rotating shaft. In addition to being capable of bending and extending in the axial direction of the rotating shaft, the buffer member (30) has a diameter of the rotating shaft when the first rotating shaft (1) and the second rotating shaft (2) are displaced in parallel. Expands and contracts in the direction
When the first rotating shaft (1) and the second rotating shaft (2) are twisted, the cushioning member (30) expands and contracts in the radial direction of the rotating shaft and bends and expands in the axial direction of the rotating shaft. Characteristic rotating shaft connection structure. 2. A first rotating shaft (1), a first connecting member (10) provided at the front end of the first rotating shaft (1), and a rear end of the first connecting member (10) with respect to the front end thereof. The second connecting member (20) engaged with the second connecting member (20) and the second connecting member (20)
A rotary shaft (2), and an appropriate number of claws (11) are arranged at the tip of the first connecting member (10) along the circumferential direction of the rotary shaft,
An appropriate number of claws (12) are arranged at the rear end of the second connection member (20) along the circumferential direction of the rotary shaft, and each claw (11) (12) is connected to the claws (11) (12). Connect the rake face (11 ') (12') extending from the top to the base approximately parallel to the axial direction of the rotating shaft and the top of the rake face (11 ') (12') to the bottom of the adjacent claw (11). It has a substantially mountain shape defined by the slope and the rake face (1) of the claws (11) (12) of the first and second connecting members (10) (20).
The rotation of the first rotary shaft (1) is transmitted to the second rotary shaft (2) through the first and second connecting members (10) and (20) by meshing the 1 ') and (12') with each other. In the rotary shaft connecting structure, at least one of the first and second connecting members (10) (20) has a central portion (13) directly connected to the rotary shaft (1), An annular part (14) arranged at intervals outside the central part (13), and a plurality of parts are provided between the outer peripheral surface of the central part (13) and the inner peripheral surface of the annular part (14). The ring-shaped cushioning members (30) are passed over, and these cushioning members (30) are arranged with a space between adjacent cushioning members (30) and expand and contract in the radial direction of the rotating shaft. In addition to being capable of bending and extending in the axial direction of the rotating shaft, the buffer member (30) has a diameter of the rotating shaft when the first rotating shaft (1) and the second rotating shaft (2) are displaced in parallel. Stretch in direction And
When the first rotating shaft (1) and the second rotating shaft (2) are twisted, the cushioning member (30) expands and contracts in the radial direction of the rotating shaft and bends and expands in the axial direction of the rotating shaft. Characteristic rotating shaft connection structure.