JP2648083B2 - Shaft coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling, and more particularly, to a compact flexible shaft coupling which is easy to assemble and repair.

[0002]

2. Description of the Related Art In various kinds of torque transmitting mechanisms, ends of two rotating shafts are connected by a joint. For example, an output rotation shaft of an engine or a motor and an input rotation shaft of a pump are connected by a joint. In this case, it takes considerable effort to carefully install the engine, the motor and the pump so that the output rotary shaft of the engine or the motor is sufficiently aligned with the input rotary shaft of the pump. In addition, even if the installation is performed with sufficient care for such alignment, some eccentricity and declination remain between the two rotating shafts, and furthermore, the engine, the motor and the pump generate vibration during operation. Therefore, a flexible joint using a flexible member such as a spring or rubber has been used in order to absorb these at the joint portion.

It is an object of the present invention to provide a shaft coupling that is easy to assemble and repair. Another object of the present invention is to provide a compact shaft coupling.

[0004] It is still another object of the present invention to provide a shaft coupling that can transmit torque smoothly with little vibration transmission. Still another object of the present invention is to provide a shaft coupling capable of coping with eccentricity, declination and axial movement between the driving shaft side and the driven shaft side.

[0005]

According to the present invention, in order to achieve the above object, a driving shaft side flange portion and a driven shaft side flange portion are disposed to face each other, and the driven shaft side flange portion of the driving shaft side flange portion is provided. Four or more leaf spring members are disposed along the circumferential direction on the back surface opposite to the surface facing the side flange portion, and one circumferential end of each of these leaf spring members is attached to the driving shaft side flange portion. The other end in the circumferential direction of each leaf spring member is connected to the other end in the circumferential direction of the adjacent leaf spring member, and the shaft is located at the driving shaft side flange portion position corresponding to the connection portion of these leaf spring members. An opening or notch that penetrates in the direction is provided, and four or more leaf spring members are provided along the circumferential direction on the back surface opposite to the surface of the driven shaft side flange portion facing the driving shaft side flange portion. Are arranged around the leaf spring members. Is attached to the driven shaft side flange portion, and the other end in the circumferential direction of each leaf spring member is connected to the other end in the circumferential direction of the adjacent leaf spring member, corresponding to the connection portion of these leaf spring members. The driven shaft side flange portion is provided with an opening or notch that penetrates in the axial direction, and the opening or notch of the driving shaft side flange portion and the opening or notch of the driven shaft side flange portion. And a rotational force capable of axially penetrating the openings or notches in the driving shaft side flange and the corresponding openings or notches in the driven shaft side flange with sufficient margin. transmission rod is disposed in a plurality independently, the driven shaft leaf spring member connecting portion is attached to the other end to one end of the rotational force transmission rod and the driving shaft leaf spring member connecting portion is attached Have, characterized in that, the shaft coupling, are provided.

In one aspect of the present invention, the leaf spring member is disposed substantially parallel to the back surface of the driving shaft side flange portion or the back surface of the driven shaft side flange portion, and the driving shaft side flange at one end of the leaf spring member is provided. Mounting to the portion or the driven shaft side flange portion is performed by bolting, and the connection between the other ends of the leaf spring members and the mounting of the leaf spring member connecting portion to one end or the other end of the rotational force transmission rod are performed. It is done by bolting.

In another aspect of the present invention, one end of each of the leaf spring members in the circumferential direction is attached to a driving shaft side flange portion or a driven shaft side flange portion, and a driving shaft of one circumferential end of an adjacent leaf spring member is mounted. The attachment to the side flange portion or the driven shaft side flange portion is performed at the same position.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a shaft coupling according to the present invention, FIG. 2 is a perspective view in an assembled state, and FIG. 3 is a partial sectional view thereof. In these figures, reference numeral 2 denotes a driving shaft side flange portion, which is attached to an end of the driving shaft (not shown) by key connection.
2 'is the driving shaft rotation center. Reference numeral 4 denotes a driven shaft side flange portion, which is attached to an end of the driven shaft (not shown) by key connection. 4 'is a driven shaft rotation center.
The driving shaft rotation 2 'and the driven shaft rotation center 4' substantially match. Accordingly, the driven-side end surface (surface) of the driving shaft side flange portion 2 and the driven side end surface (surface) of the driven shaft side flange portion 4 are substantially parallel to each other.

The driving shaft side flange portion 2 has four axially threaded holes 6a, 6b, 6c, 6 evenly arranged in the circumferential direction.
d and four axial openings 7 arranged evenly in the circumferential direction
a, 7b, 7c, 7d (not shown). The positions of these eight screw holes or openings are evenly distributed in the circumferential direction. Similarly, the driven shaft side flange portion 4 has four axial screw holes 8a, 8b, 8c, 8d evenly arranged in the circumferential direction and four axial opening portions 9a evenly arranged in the circumferential direction. 9b, 9c and 9d are formed. The positions of these eight screw holes or openings are evenly distributed in the circumferential direction. Then, the four axial screw holes 6a, 6b, 6c, 6d of the driving shaft side flange portion 2 are formed.
And four axial screw holes 8a, 8 of the driven shaft side flange portion 4.
b, 8c and 8d are respectively located in correspondence with the axial direction, and the four axial openings 7 of the driving shaft side flange portion 2 are provided.
a, 7b, 7c, 7d and four axial openings 9a, 9b, 9c, 9d of the driven shaft side flange portion 4 are located corresponding to the axial direction, respectively.

The axial opening 7 of the driving shaft side flange 2
a, 7b, 7c, 7d and the corresponding axial openings 9a, 9b, 9c, 9d of the driven shaft side flange portion 4 axially penetrate through corresponding ones, and the rotational force transmitting rods 10a, 10
b, 10c and 10d are arranged respectively. The rod is formed with a screw hole that can penetrate in the axial direction.

On the rear surface of the driving shaft side flange portion 2, eight circular arc-shaped leaf spring members 12a, 12b,
12c, 12d, 14a, 14b, 14c, and 14d are arranged. These leaf spring members have openings at both ends,
Adjacent objects are overlapped at their ends with matching openings. An opening at one end of each leaf spring member is disposed at a position corresponding to the axial screw hole of the driving shaft side flange portion 2. By screwing a bolt into the screw hole, the leaf spring member is moved to the driving shaft side flange. It is attached to the part 2. Further, the opening at the other end of each leaf spring member is disposed at a position corresponding to the above-mentioned torque transmitting rod together with the opening at the other end of the adjacent leaf spring member, and the bolt is screwed into a screw hole of the rod to thereby allow the leaf spring to rotate. A spring member is attached to the end of the torque transmitting rod on the driving shaft side. As shown, the attachments are interposed with washers.

On the rear surface of the driven shaft side flange portion 4, eight arc-shaped leaf spring members 16a, 16b,
16c, 16d, 18a, 18b, 18c and 18d are arranged. These driven-shaft-side leaf spring members are also attached to the driven-shaft-side flange portion 4 and the rotational force transmitting member in the same manner as the above-described driven shaft-side leaf spring members.

FIG. 3 shows how each member near the torque transmitting rod 10a is attached. As shown, the torque transmitting rod 10a has an outer diameter smaller than the inner diameter of the flange opening portions 7a and 9a to be penetrated. It has a length longer than the interval. The same applies to other torque transmission rods.

The above-described shaft coupling of this embodiment can be easily manufactured by assembling the constituent members as shown in FIG.

The leaf spring member may be composed of one leaf spring, or may be composed of a plurality of leaf springs bonded together. Further, depending on the magnitude of the rotational force to be transmitted, a leaf spring member made of a reinforced plastic which is advantageous for weight reduction can be used in addition to a metal leaf spring member.

In this embodiment, the driving shaft side flange 2
Is rotated, the rotational force is changed by the leaf spring members 12a to 12a.
d, 14a to 14d through the rotational force transmission rod 10a to
10d, and is transmitted from the rod to the leaf spring members 16a to 16d.
Driven shaft side flange 4 via 16d, 18a to 18d
Is transmitted to.

Based on deformation of each leaf spring member, such as bending or torsion, the driving shaft side flange portion 2 and the driven shaft side flange portion 4 relatively rotate around the axial direction. The movement in the axial direction, the movement in a plane orthogonal to the axial direction, and the rotation such that the driving shaft rotation center 2 ′ and the driven shaft rotation center 4 ′ are tilted are possible within appropriate ranges.

As a result, the transmission of vibration between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 can be suppressed and the rotational force can be transmitted smoothly, and the eccentricity and declination between the driving shaft side and the driven shaft side can be achieved. Alternatively, even if axial movement occurs, it can be absorbed.

The distance between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 is determined by the relative movement between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 expected to occur during operation. It is set not to disturb.

Each axial opening 7a, 7b, 7c, 7d of the driving shaft side flange 2 and the driven shaft side flange 4
The size of each axial opening 9a, 9b, 9c, 9d of
The margin is set so as not to hinder the relative movement between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 expected to occur during operation. Instead of these openings,
A notch may be formed by cutting out to the outside of the flange.

In the above embodiment, the leaf spring member 12
a to 12d, 14a to 14d, 16a to 16d, 18a
Since only one type is required as the １８18d, the number of types of constituent parts can be reduced. When any one of the leaf spring members and the rotational force transmission rod is damaged, it can be easily replaced by removing bolts of the corresponding portions, and repair is simple.

In the above embodiment, since the leaf spring member is attached to the back side of the driving shaft side flange portion 2 and the driven shaft side flange portion 4, the surface of the driving shaft side flange portion 2 and the driven shaft side are mounted. The dimension in the axial direction can be reduced by bringing the surface of the flange portion 4 sufficiently close to the minimum distance, and
Compactness is possible.

[0024]

As described above, according to the present invention, a shaft coupling that can be easily assembled and repaired can be provided, and a compact shaft coupling can be provided. Further, according to the present invention, it is possible to provide a shaft coupling capable of transmitting a rotational force smoothly with little vibration transmission, and to provide eccentricity, declination and axial movement between a driving shaft side and a driven shaft side. Can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a shaft coupling according to the present invention.

FIG. 2 is a perspective view of an assembled state of the shaft coupling of FIG. 1;

FIG. 3 is a partial sectional view of the shaft coupling of FIG. 1;

[Explanation of symbols]

 2 Drive shaft side flange portion 2 'Drive shaft rotation center 4 Drive shaft side flange portion 4' Drive shaft rotation center 6a to 6d Screw hole 7a to 7d Opening 8a to 8d Screw hole 9a to 9d Opening 10a to 10d Rotational force transmission Rods 12a to 12d Leaf spring members 14a to 14d Leaf spring members 16a to 16d Leaf spring members 18a to 18d Leaf spring members

Claims (3)

(57) [Claims] 1. A driving shaft side flange portion and a driven shaft side flange portion are disposed to face each other, and four or more driving shaft side flange portions are provided on a back surface opposite to a surface of the driving shaft side flange portion facing the driven shaft side flange portion. The leaf spring members are arranged along the circumferential direction, one circumferential end of each of the leaf spring members is attached to the driving shaft side flange portion, and the other circumferential end of each of the leaf spring members is an adjacent plate. An opening or notch is provided at the driving shaft side flange portion corresponding to the connecting portion of these leaf spring members, and an opening or notch is provided to penetrate in the axial direction. Four or more leaf spring members are arranged along the circumferential direction on the back surface opposite to the surface of the flange portion facing the driving shaft side flange portion, and one end of each of the leaf spring members in the circumferential direction is a driven shaft. Each of these plate covers The other end in the circumferential direction of the member is connected to the other end in the circumferential direction of the adjacent leaf spring member, and an opening or notch penetrating in the axial direction is provided at the driven shaft side flange portion corresponding to the connection portion of these leaf spring members. The opening or notch of the driving shaft side flange and the opening or notch of the driven shaft side flange are arranged at corresponding positions. A plurality of rotational force transmitting rods are disposed independently of each other so as to allow the openings or notches and the corresponding openings or notches of the driven shaft side flange to pass through each other in the axial direction with a margin. A shaft joint, wherein the driving shaft side leaf spring member connection portion is attached to one end, and the driven shaft side leaf spring member connection portion is attached to the other end. 2. The plate spring member is disposed substantially parallel to the back surface of the driving shaft side flange portion or the back surface of the driven shaft side flange, and the driving shaft side flange portion or the driven shaft side flange at one end of the plate spring member. The connection to the other end of the leaf spring member and the attachment of the connection portion of the leaf spring member to one end or the other end of the rotational force transmission rod are performed by bolting. The shaft coupling according to claim 1. 3. Attaching one circumferential end of each of the leaf spring members to the driving shaft side flange portion or the driven shaft side flange portion, and attaching one circumferential end of the adjacent leaf spring member to the driving shaft side flange portion or the driven shaft side. The shaft coupling according to claim 1, wherein the attachment to the flange portion is performed at the same position.