JPH07103254A - Shaft coupling - Google Patents

Abstract

PURPOSE:To provide a compact shaft coupling capable of being easily assembled and repaired. CONSTITUTION:Plate spring members 20a, 20b, 22a, 22b, 24a, 24b, 26a, 26b are arranged on the back surfaces of a driving shaft side flange part 2 and a driven shaft side flange part 4. The mutually adjacent plate springs are circumferentially arranged on the driving shaft side and the driven shaft side so that their ends are superimposed on each other. The plate spring member superimposing parts are attached to the driving shaft side flange part 2, the driven shaft side flange part 4 and a relay member 10 every other one. That is, the plate spring members are attached to the flange parts 2, 4 by bolts to be fit into threaded holes 6a, 6b, 8a, 8b. Moreover, the plate spring members are attached to the realy member 10 through spacers 14a, 14b, 16a, 16b to be made to axially penetrate opening parts 7a, 7b, 9a, 9b with allowance by bolts to be fitted into threaded holes 12a, 12b, 13a, 13b.

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 flexible shaft coupling which is easy to assemble and repair and is compact.

[0002]

2. Description of the Related Art In various torque transmission mechanisms, the ends of two rotary shafts are connected by a joint. For example, an output rotary shaft of an engine or a motor and an input rotary shaft of a pump are connected by a joint. In this case, it takes a great deal of effort to carefully install the engine, the motor and the pump so that the output rotary shaft of the engine and the motor are sufficiently aligned with the input rotary shaft of the pump. In addition, even if installation is done with careful attention to such alignment, some eccentricity and declination remain between both rotary shafts, and further vibrations occur in the engine, motor, and pump during operation. Therefore, in order to absorb these in the joint portion, a flexible joint using a flexible member such as a spring or rubber has been conventionally used.

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. Another object of the present invention is to provide a shaft coupling having sufficient torsional rigidity.

Still another object of the present invention is to provide a shaft coupling that can transmit rotational force smoothly with less vibration transmission. Still another object of the present invention is to provide a shaft coupling which can deal 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 arranged so as to face each other, and the driving shaft side flange portion and the driving shaft side flange portion are connected to each other. The driving shaft side leaf spring member is provided with a relay member for transmitting the rotational force to the driven shaft side flange portion, and the driving shaft side leaf spring member is at the first position along the circumferential direction. The driven shaft side leaf spring member is mounted on a back surface opposite to the front surface facing the flange portion, and is connected to the relay member at a second position different from the first position along the circumferential direction. Is mounted on the back surface of the driven shaft side flange portion opposite to the front surface facing the driving shaft side flange portion at a third position along the circumferential direction, and the third position along the circumferential direction. 4th place different from 3 position Is connected to the relay member in, characterized in that, the shaft coupling, are provided.

In one aspect of the present invention, a plurality of the drive shaft side leaf spring members are arranged in a circle with their ends overlapping each other, and the drive shaft side leaf spring member overlapping portions are arranged in one. Every other second is mounted on the driving shaft side flange portion and the relay member, the driven shaft side leaf spring member is arranged in a circumferential shape by overlapping the end portions of a plurality of adjacent ones, Every other one of these driven shaft side leaf spring member overlapping portions is attached to the driven shaft side flange portion and the relay member.

In one aspect of the present invention, the driving shaft side leaf spring member is formed of one ring-shaped body.

In one aspect of the present invention, the relay member is disposed between the driving shaft side flange portion and the driven shaft side flange portion, and the driving shaft side flange portion has an opening penetrating in the axial direction. And a notch portion are provided, and a driving shaft side rotational force transmission rod that allows the opening portion or the notch portion to pass through in the axial direction with a margin is arranged, and the driving force is transmitted through the driving shaft side rotational force transmission rod. The shaft-side leaf spring member is attached to the relay member, and the driven shaft-side flange portion is provided with an opening or a notch that can penetrate in the axial direction, and the opening or notch is provided in the axial direction with a margin. A driven shaft side rotational force transmission rod that penetrates is arranged,
The driven shaft side leaf spring member is attached to the relay member via the driven shaft side rotational force transmitting rod.

In one aspect of the present invention, the relay member is arranged radially outward of the driving shaft side flange portion and the driven shaft side flange portion.

In one aspect of the present invention, the relay member has a recess for receiving the driving shaft side flange portion and a recess for receiving the driven shaft side flange portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention, FIG. 2 is a perspective view of its assembled state, and FIG. 3 is a partial sectional side view thereof. In these drawings, 2 is a driving shaft side flange portion, and the flange portion is attached to an end portion of a driving shaft (not shown) by key connection. 2'is the center of rotation of the drive shaft. Reference numeral 4 denotes a driven shaft side flange portion, which is attached to an end portion of a driven shaft (not shown) by key connection. 4'is the center of rotation of the driven shaft. The drive shaft rotation 2 ′ and the driven shaft rotation center 4 ′ substantially coincide with each other. Therefore, the driven-side end surface (front surface) of the driving shaft-side flange portion 2 and the driving-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 is formed with two axial screw holes 6a and 6b evenly arranged in the circumferential direction and two axial opening portions 7a and 7b evenly arranged in the circumferential direction. Has been done. The positions of these four screw holes or openings are evenly distributed in the circumferential direction. Similarly, the driven shaft side flange portion 4 is formed with two axial screw holes 8a and 8b evenly arranged in the circumferential direction and two axial opening portions 9a and 9b evenly arranged in the circumferential direction. Has been done. The positions of these four screw holes or openings are evenly distributed in the circumferential direction. Then, the two axial screw holes 6a and 6b of the driving shaft side flange portion 2 and the two axial direction opening portions 9a and 9b of the driven shaft side flange portion 4 are located corresponding to the axial direction, respectively. Two axial openings 7 of the shaft side flange portion 2
a and 7b and the two axial screw holes 8a and 8b of the driven shaft side flange portion 4 are respectively located corresponding to the axial direction.

Between the driving shaft side flange portion 2 and the driven shaft side flange portion 4, there is a relay having a relay function when transmitting the rotational force from the driving shaft side flange portion 2 to the driven shaft side flange portion 4. The member 10 is arranged. The relay member is ring-shaped and has screw holes 12a, 12 at positions corresponding to the two axial openings 7a, 7b of the driving shaft side flange portion 2.
b is provided, and the screw hole 13 is provided at a position corresponding to the two axial openings 9a and 9b of the driven shaft side flange portion 4.
a and 13b are provided.

Axial opening 7 of the driving shaft side flange portion 2
Cylindrical spacers 14a and 14b are arranged so as to penetrate through a and 7b with a margin in the axial direction. Cylindrical spacers 16a and 16b are arranged so as to pass through the axial openings 9a and 9b of the driven shaft side flange portion 4 with a margin in the axial direction.

On the back surface of the driving shaft side flange portion 2, four arc-shaped leaf spring members 20a, 20b,
22a and 22b are arranged. These leaf spring members have openings at both ends, and adjacent ones have their ends overlapped with each other by matching the openings. The opening at one end of each leaf spring member is arranged 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 becomes a driving shaft side flange. It is attached to the part 2. Further, the opening at the other end of each leaf spring member is arranged at a position corresponding to the tubular spacer together with the opening at the other end of the adjacent leaf spring member. The leaf spring member is attached to the relay member 10 by screwing it into the corresponding screw hole. As shown, washers are interposed between these attachments.

On the back surface of the driven shaft side flange portion 4, four arc-shaped leaf spring members 24a, 24b, are formed along the circumferential direction.
26a and 26b are arranged. These leaf spring members on the driven shaft side are also the same as the leaf spring members on the driving shaft side,
It is attached to the driven shaft side flange portion 4 and the relay member 10.

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

As the plate spring member, one made of one plate spring may be used, or one formed by laminating a plurality of plate springs may be used. Further, depending on the magnitude of the rotational force to be transmitted, a leaf spring member made of reinforced plastic, which is advantageous for weight reduction, may be used instead of being made of metal.

In this embodiment, the driving shaft side flange portion 2
When the blade rotates, the rotational force is generated by the leaf spring members 20a, 20
b, 22a, 22b and is transmitted to the relay member 10, and the leaf spring members 24a, 24b, 26 are transmitted from the relay member 10.
It is transmitted to the driven shaft side flange portion 4 via a and 26b.

On the basis of deformation such as bending and twisting of each leaf spring member, the relative rotation between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 is as follows. The movement in the axial direction, the movement in a plane orthogonal to the axial direction, and the rotation so as to incline the driving shaft rotation center 2 ′ and the driven shaft rotation center 4 ′ are possible within appropriate ranges.

As a result, the vibration transmission between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 can be suppressed to smoothly transmit the rotational force, and the eccentricity and declination between the driving shaft side and the driven shaft side can be reduced. Or, 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 which is expected to occur during operation. It is set not to interfere.

The sizes of the axial openings 7a, 7b of the driving shaft side flange portion 2 and the axial opening portions 9a, 9b of the driven shaft side flange portion 4 are expected to occur during operation. It is set with a margin so as not to hinder the relative movement between the shaft side flange portion 2 and the driven shaft side flange portion 4. Instead of these openings, a notch may be formed that is notched outward from the flange.

In the above embodiment, since the relay member 10 is used, the torsional rigidity can be sufficiently enhanced.

Further, in the above embodiments, the leaf spring members 20a, 20b, 22a, 22b, 24a, 24b,
Since the same shape may be used as 26a and 26b, the number of types of constituent parts may be small. Then, when any of the leaf spring members and the rotational force transmission rod are damaged,
It can be easily replaced by pulling out the bolt of the corresponding part, and the repair is easy.

Further, in the above embodiment, since the leaf spring member is attached to the rear surface 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. By making the surface of the flange portion 4 sufficiently close to the minimum distance, the axial dimension can be reduced,
It is possible to make compact while maintaining sufficient flexibility.

FIG. 4 is an exploded perspective view showing a second embodiment of the shaft coupling according to the present invention. In these figures, members and portions having the same functions as those in FIGS. 1 to 3 are designated by the same reference numerals.

In this embodiment, the shapes of the driving shaft side flange portion 2 and the driven shaft side flange portion 4 are different from those of the first embodiment, and there is no axial opening of the flange portion as in the above embodiments. Further, the relay member 10 is formed with holes 12a ', 12b', 13a ', 13b' instead of screw holes, and bolts passing through these holes are compatible with nuts. As shown, the center of the hole 12a 'and the hole 12a'
The angle formed by the line connecting the centers of b ′ and the line connecting the centers of the holes 13a ′ and 13b ′ is 45 °.

Also in this embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 5 is an exploded perspective view showing a shaft coupling according to a third embodiment of the present invention, and FIG. 6 is a perspective view showing its assembled state. In these figures, members and portions having the same functions as those in FIGS. 1 to 4 are designated by the same reference numerals.

The present embodiment differs from the first embodiment in that the relay member 10 is a large ring arranged radially outward of the driving shaft side flange portion 2 and the driven shaft side flange portion 4. There is no axial opening of the flange portion as in the above embodiment, and the drive shaft side leaf spring members 20a, 20b, 2
2a, 22b array shape and driven shaft side leaf spring member 24
The array shape of a, 24b, 26a, and 26b is substantially elliptical.

Also in this embodiment, the same effect as that of the first embodiment can be obtained. Further, in this embodiment, the relay member 10 is located radially outward rather than between the driving shaft side flange portion 2 and the driven shaft side flange portion 4, so that the driving shaft side flange portion 2 and the driven shaft side flange portion are arranged. 4 can be shortened and the axial length of the joint can be shortened.

FIG. 7 is an exploded perspective view showing a fourth embodiment of a shaft coupling according to the present invention, and FIG. 8 is a perspective view showing its assembled state. In these figures, members and portions having the same functions as those in FIGS. 1 to 6 are given the same reference numerals.

In this embodiment, each of the driving shaft side leaf spring member 21 and the driven shaft side leaf spring member 25 is composed of one ring-shaped body. These ring-shaped bodies correspond to those obtained by unifying the four leaf spring members on the driving shaft side and the driven shaft side in the first to third embodiments, respectively. The relay member 10 has a recess 11a for receiving the driving shaft side flange portion 2 and a recess 11b for receiving the driven shaft side flange portion 4.

Also in this embodiment, the same effect as that of the first embodiment can be obtained. Furthermore, in this embodiment, the number of parts can be reduced. In addition, the driving shaft side flange portion 2 and the driven shaft side flange portion 4 are connected to the recesses 11 a and 11 b of the relay member 10.
Since it is received, the distance between the driving shaft side flange portion 2 and the driven shaft side flange portion 4 can be shortened while maintaining the strength of the relay member, and the axial length of the joint can be shortened.

[0037]

As described above, according to the present invention, it is possible to provide a shaft coupling that is easy to assemble and repair, and it is possible to provide a compact shaft coupling. Further, according to the present invention, since the relay member is interposed, it is possible to obtain a shaft coupling having sufficient torsional rigidity. Furthermore, according to the present invention, it is possible to provide a shaft coupling that can transmit rotational force smoothly with less vibration transmission, and can achieve eccentricity, declination, and axial movement between the driving shaft side and the driven shaft side. It is possible to provide a shaft coupling that can cope with the above.

[Brief description of drawings]

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

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

FIG. 3 is a partial cross-sectional view of the shaft coupling of FIG.

FIG. 4 is an exploded perspective view showing a second embodiment of the shaft coupling according to the present invention.

FIG. 5 is an exploded perspective view showing a third embodiment of the shaft coupling according to the present invention.

FIG. 6 is a perspective view of the shaft coupling of FIG. 5 in an assembled state.

FIG. 7 is an exploded perspective view showing a fourth embodiment of the shaft coupling according to the present invention.

8 is a perspective view of the shaft coupling of FIG. 7 in an assembled state.

[Explanation of symbols]

 2 Drive shaft side flange part 2'Drive shaft rotation center 4 Driven shaft side flange part 4'Drive shaft rotation center 6a, 6b Screw hole 7a, 7b Opening part 8a, 8b Screw hole 9a, 9b Opening part 10 Relay member 11a, 11b Recesses 12a, 12b Screw holes 12a ', 12b' Holes 13a, 13b Screw holes 13a ', 13b' Holes 14a, 14b Spacers 16a, 16b Spacers 20a, 20b Leaf spring members 21 Leaf spring members 22a, 22b Leaf spring members 24a, 24b Leaf spring member 25 leaf spring member 26a, 26b leaf spring member

Claims (6)

[Claims] 1. A driving shaft side flange portion and a driven shaft side flange portion are arranged so as to face each other, and a relay member is provided for transmitting a rotational force from the driving shaft side flange portion to the driven shaft side flange portion. The driving shaft side leaf spring member is attached to a rear surface of the driving shaft side flange portion opposite to the surface facing the driven shaft side flange portion at the first position along the circumferential direction, It is connected to the relay member at a second position different from the first position along the circumferential direction, and the driven shaft side leaf spring member is at the third position along the circumferential direction at the driven shaft side flange. Is attached to a rear surface opposite to the front surface facing the driving shaft side flange portion, and is connected to the relay member at a fourth position different from the third position in the circumferential direction. , Characterized by the axis Hand. 2. The driving shaft side leaf spring members are circumferentially arranged with their ends overlapping each other, and every other one of these driving shaft side leaf spring member overlapping portions is the driving force. The driven-shaft-side leaf spring member is attached to the shaft-side flange portion and the relay member, and the driven-shaft-side leaf spring members are circumferentially arranged with their ends overlapping each other. The shaft coupling according to claim 1, wherein every other member overlapping portion is attached to the driven shaft side flange portion and the relay member. 3. The shaft coupling according to claim 1, wherein the driving shaft side leaf spring member is formed of one ring-shaped body. 4. The relay member is arranged between the driving shaft side flange portion and the driven shaft side flange portion, and the driving shaft side flange portion is provided with an opening or a notch which is axially pierceable. A driving shaft side rotational force transmission rod that is provided and that penetrates the opening or notch in the axial direction with a margin is arranged, and the driving shaft side leaf spring member is provided via the driving shaft side rotational force transmission rod. Attached to the relay member, the driven shaft side flange portion is provided with an opening portion or a notch portion that penetrates in the axial direction, and the driven shaft side that allows the opening portion or the notch portion to penetrate in the axial direction with a margin. 4. The shaft coupling according to claim 1, wherein a rotational force transmission rod is arranged, and the driven shaft side leaf spring member is attached to the relay member via the driven shaft side rotational force transmission rod. . 5. The shaft coupling according to claim 1, wherein the relay member is arranged radially outward of the driving shaft side flange portion and the driven shaft side flange portion. 6. The relay member according to claim 1, wherein the relay member has a concave portion for receiving the driving shaft side flange portion and a concave portion for receiving the driven shaft side flange portion. Shaft coupling.