JPS5817885B2 - Tawamijikutsugite - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible shaft joint that is capable of transmitting a large torque compared to the size of the joint between rotating shafts having misaligned axes, and that is detachable.

Conventionally, machine tools,
Flexible shaft couplings such as gear couplings or disc couplings have been widely used as shaft couplings for drive systems such as pumps and compressors.

However, gear couplings have maintenance problems such as tooth surface wear and lubrication, and disc couplings have problems with strength and processing accuracy.

Furthermore, the drive shaft and driven shaft are often separated at the shaft joint for maintenance and inspection of the rotary shaft system, and there are also cases where the one hand part has failed and must be repaired or replaced.

Therefore, speeding up inspection work, repair and replacement work,
There has been a wide demand for flexible shaft joints that are easy to attach and detach.

Furthermore, in terms of ease of handling, installation space, and cost, it is desirable for such a flexible shaft joint to be compact as a whole compared to the transmission torque.

This invention solves the above-mentioned problems regarding flexible shaft couplings that transmit relatively large torques, and eliminates the need for maintenance and inspection over a long period of time. It is an object of the present invention to provide a flexible shaft joint which is extremely easy to attach and detach, and which has a large ratio of transmission torque to the overall size.

In order to achieve the above object, the flexible shaft joint of this invention has the following features:
Consisting of a pair of hub members each having a flange and connected to a drive shaft or driven shaft, and a joint body that is removably inserted between the flanges of the opposing hub members, the joint body includes a pair of disks and an elastic It has a plurality of connecting members made by laminating connecting elements made of thin plates, and each disk has a plurality of pins arranged perpendicular to the disk surface, and are fitted into pin holes provided in the disk. A pair of disks are placed facing each other with the pins protruding toward the other disk, and the pins of one disk and the pin of the other disk are connected with a connecting member to connect the two disks together. The connecting member is characterized in that washers made of a flexible elastic material are disposed at both ends of the connecting member.

Embodiments of the flexible shaft joint according to the present invention will be described in detail below.

FIG. 1 is a sectional view of the flexible shaft joint.

In the figure, the flexible shaft joint mainly consists of a pair of hub members 3 and a joint body 11.

Each hub member 3 has a flange 4 at one end, and a drive shaft 1 and a driven shaft 2 are inserted into respective shaft holes 5.

The joint body 11 has two annular disks 12a and 1 of the same shape.
2b.

The disk 12 is provided with two protrusions 13 at intervals of 180 degrees in the circumferential direction, and a pin 15 is attached to each protrusion in parallel to the disk center axis.

The screw 15 is tightly fitted into a pin hole 14 accurately drilled perpendicularly to the disk surface so that the rear end does not protrude beyond the disk surface, and is fixed to the disk by welding 16.

By providing the protrusion 13 on the surface of the tooth disk 12 as described above, the support length of the pin 15 by the protrusion 13 becomes longer, and the pin 15 can be strongly supported, and at the same time, a pair of tooth disks 12 can be faced to each other. At times, sufficient space can be provided between both the disks so that the tip of the pin 15 on the other side does not abut against the surface of the disk 12.

A pair of disks 12a and 12 configured as above
b with pins 15 facing each other's disc, and
They face each other at equal intervals in the circumferential direction, that is, facing each other at 90 degrees.

Then, as shown in FIG. 2, adjacent pins 15a
15b are connected by the connecting member 21, that is, the ends of the adjacent connecting members 21 are overlapped, and one pin 15 passes through this, so that the pair of disks 12
a and 12b are alternately connected in a link shape by four connecting members 21.

As shown in FIG. 2, the connecting member 21 is constructed by laminating a large number of connecting elements 22 made of cocoon-shaped thin steel plates, for example, 20 pieces.
Connect these pins by inserting them.

A nut 18 is screwed into a screw 17 cut at the tip of the pin 15, thereby fastening the connecting member 21 to the pin 15.

Furthermore, as shown in FIG. 3, the protrusion 13 of the disk 12
A washer 24 made of a flexible elastic material such as rubber or plastic is provided between the nut 18 and the connecting member 21, between the nut 18 and the connecting member 21, and between the connecting members 21.
This is an intervention.

These washers 24 prevent the end surfaces of the connecting members 2 and 1 from coming into contact with the protrusion 13, the nut 18, or the outer peripheral edge C of the end of the connecting member 21, and preventing the connecting member 21 from bending from this point and being damaged. .

Further, when the connecting member 21 is tilted in the axial direction with respect to the pin 15, the washer 24 expands and contracts in its thickness direction, allowing the connecting member 21 to tilt in the axial direction of the pin 15,
To prevent excessive force from being applied to the connecting member 21.

The joint main body 11 configured as described above is inserted between the hub members 3 arranged with their flanges facing each other, and the disk 12a and the flange 4 of one hub member 3 are connected by the bold 19, and the disk 12b and the other The flange 4 of the hub member 3 is removably connected to the flange 4 of the hub member 3 by a bold 20.

Next, the operation of the flexible shaft joint configured as described above will be explained.

The connecting member 21 is a portion that transmits torque while allowing misalignment of the axes of the drive shaft and the driven shaft.

That is, one of the two pairs of connecting members 21 facing each other across the center of the disk receives a tensile load corresponding to torque in the longitudinal direction of the connecting member 21, and the pin 15a of one disk 12a moves from the pin 15a of the other disk 12b. Torque is transmitted to pin 15b.

At this time, the connecting member 21 bends toward the surfaces of the disks 12a and 12b, absorbing the oblique movement between the shafts.

Since the connecting member 21 is constructed by laminating a large number of thin plates as described above, it can be bent freely and can withstand a large tensile load.

In addition, in the case of a flexible shaft joint in which the wheels 12 are connected by two sets of connecting members '21 as in this embodiment, both parts are
Since the relative permissible displacement amount between the isks 12a and 12b is large, a displacement several times the machining accuracy of the pin hole 14 is permissible.

As described above, the pin 15 is fixed to the disk 12 by welding and is integrated with the disk.

Therefore, the pin 15 may be damaged by impact forces during use on the disk 12. ,! The relative position of : never changes, so
Undue bending or torsional stress due to changes in relative position does not occur in the connecting member 21, and the force is applied on the average.

Further, since the thickness of the disk 12 including the height of the holding portion of the pin 15, that is, the height of the protruding portion 13, can be reduced, the distance between the surfaces of the flexible shaft joint can be significantly reduced.

Furthermore, since there is no relative movement between the disk 12 and the pin 15, no wear occurs at the joint between the two.

The drive shaft 1 and the driven shaft 2 can be separated by removing the balls 19 and 20 in FIG. 1 and pulling out the joint body 11 in a direction perpendicular to the shaft.

Moreover, in the case of replacing the joint, only the joint main body 11 needs to be replaced.

FIGS. 4 and 5 show other embodiments of the present invention, and are sectional views of a flexible shaft joint.

The joint main body 27 of this embodiment has a pair of discs 28 as in the above embodiment.

A pair of pins 30 are provided on the surface of the disk 28 adjacent to each other in the circumferential direction.
A pair of protrusions 2 that are slightly wider in the circumferential direction to hold the
9 are provided at intervals of 180°.

The pair of pins 30 are fixed to each of these protrusions 29 by welding.

Therefore, in the above embodiment, two pins 15 were fixed to one disk 1''2, but in this embodiment, one
This means that four pins 30 are fixed to one disk 28.

A pair of teeth 28a and 28b configured as described above are opposed to each other such that the pair of pins 30 are spaced 90 degrees from those of the opposing teeth.

Then, as shown in FIG. 5, the pin 30a of one disc 28a and the pin 30b of the other disc 28b are connected by a connecting member 21, and the pair of discs 28a and 28b are alternately connected by the four connecting members 21. Link.

Note that the structure of the connecting member 21 and the provision of lugs made of a flexible elastic material at both ends of the connecting member 216 are the same as in the previous embodiment.

On the joint body 27ζ assembled in this way, the tooth 28 is connected to the flange 26 of the hub member 25 with a bold 31, and is detachably attached to the hub member 25.

The function of the flexible shaft joint of this embodiment is similar to that of the above-mentioned flexible shaft joint, but due to the difference in the method of connecting the disks 28a and 28b by the connecting member 21 as described above, it has the following advantages over the above-mentioned flexible shaft joint. has.

□(A) Since the connecting member can be placed closer to the outer periphery of the disk, the pitch diameter of the pin becomes larger and the transmitted torque becomes larger.

In addition, when two disks are connected, the outer diameter of the hub member body inserted through the inner side of the connecting member arranged in a polygonal shape in the circumferential direction can be increased, and therefore the diameter of the rotating shaft can be increased. Can be made larger.

(1)) The pitch diameter of the pin is not strictly limited to the length of the connecting member.

(c) Since the connecting member does not overlap with adjacent connecting members at the pin part and is on the same plane, the center of the oblique axis of the axis is located at the center of the thickness of the connecting member, and the connecting member is obliquely Do not apply excessive force.

Therefore, the strength of the pin against the transmitted torque is large.

(b) Since only one connecting member is connected to one pin, the distance between the surfaces of the flexible shaft joint becomes small.

When two sets of flexible shaft joints are used as a universal coupling, the pitch length of the diagonal center between the two sets of flexible joints can be increased.

(E) The connecting member is smaller for the same transmitted torque,
The price of the entire flexible shaft joint will be lower.

Note that as the connecting member becomes smaller, the amount of deflection becomes smaller and the permissible oblique angle of the axis becomes smaller.

In the above two embodiments, the number of connecting members was four for each joint body, but the number is not limited to this.

FIG. 6 shows an example of two flexible shaft joints of the present invention arranged in series.

The disc 38 of the joint body 37 and the disc 41 of the joint body 40 are connected back to back with a bold 43, and the flanges 36 of the hub member 35 are connected to the outer discs 39 and 42 with a bold 44, respectively.

In this way, a shaft joint in which two sets of flexible shaft joints are connected in series can tolerate about twice as much shaft center misalignment as one set, and is used for connections between shafts with large shaft center misalignments. be done.

Further, the number of pairs of flexible shaft joints connected in series is not limited to the above two pairs, but can be appropriately selected depending on the magnitude of the misalignment of the axes between the shafts.

As is clear from the detailed explanation above, the flexible shaft joint of the present invention transmits torque by creating a tensile force in the connecting member made of a laminated layer of elastic thin plates. Relatively large torque can be transmitted while allowing for misalignment between the two shafts.

Further, since there is no wear of parts, maintenance and inspection are easy, and disconnection of the drive shaft and driven shaft, or attachment and detachment of the shafts, is extremely easy because several bolts are used.

Furthermore, it is easy to connect several sets of joint bodies in series, and it can also be used to connect shafts with large misalignment.

In particular, by welding the pin to the disk and making the two into an integral structure, the pin is prevented from wearing out and unreasonable force is applied.
In addition, by arranging washers made of a flexible elastic material at each end of the connecting member, it is possible to prevent excessive force from being applied to the pin and the connecting member, significantly improving the strength and life of the flexible shaft joint. can.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the flexible shaft joint of the present invention;
Figure 2 is a cross-sectional view along the ■-river line in Figure 1, and Figure 3 is a cross-sectional view along the
FIG. 4 is a partially enlarged cross-sectional view of the flexible joint shown in the figure, and FIG. 4 shows another embodiment of the flexible shaft joint of the present invention, and FIG. 5 is a cross-sectional view of the flexible joint, and FIG. and FIG. 6 are cross-sectional views showing an example of a shaft joint in which a plurality of flexible shaft joints of the present invention are connected in series. 1... Drive shaft, 2...- Driven shaft, 3, 2
5... Hub member, 11, 27... Joint body, 12.28... Disc, 15, 30.
...Pin, 21...Connection member.

Claims (1)

[Claims] 1. A pair of bub members 3 each having a flange 4 and connected to the drive shaft 1 or the driven shaft 2, and a joint detachably inserted between the flanges 4 of the opposing bub members 3. Main body 11
The joint body 11 includes a pair of disks 12a, 1
2b, and a plurality of connecting members 21 in which connecting elements 22 made of elastic thin plates are laminated, and each disk 12a, 12
In b, a plurality of pins 15 are arranged at regular intervals in the circumferential direction and perpendicular to the surfaces of the steel disks 12a, 12b, and are fitted into pin holes 14 provided in the steel disks 12a, 12b and welded. A pair of disks 12a
, 12b and the pin 15' connects the mating disks 12a, 12.
both disks 12 so as to protrude toward b.
The pins 15 of the disks 12a and 12b are arranged to face each other so as to be alternately adjacent to each other at equal intervals, and the plurality of connecting members 21 are adjacent to each other so as to form polygonal links along the circumferential direction on the surfaces of the disks 12a and 12b. A flexible shaft joint characterized in that the pins 15 are connected to each other by a connecting member 21, and washers 24 made of a flexible material are disposed at both ends of the connecting member 21, respectively. 2 A pair of bub members 2 each having a flange and connected to the drive shaft 1 or the driven shaft 2, and the opposing bub member 2
The joint body 2 is removably inserted between the flanges 26 of 5.
7, the joint body 27 includes a pair of discs 28a,
28b, and a plurality of connecting members 21 in which connecting elements 22 made of elastic thin plates are laminated, and each disk 28a, 2
8b, a plurality of sets of pins 30, each consisting of a pair of pins 30 adjacent to each other in the circumferential direction, are arranged at regular intervals in the circumferential direction, and each pin 30 is perpendicular to the surface of the disks 28a, 28b and provided on the disks 28a, 28b. A pair of discs 28a are fitted into pin holes and welded together. 28b so that the pin 30 protrudes toward the mating disks 28a, 28b, and both disks 28a,
The pairs of pins 30 of 28b are alternately spaced apart from each other in the circumferential direction and face each other, and each pin 30 of each pair is connected to each of the adjacent pins 30 of the connecting member 21.
A flexible shaft joint characterized in that washers 24 made of a flexible material are provided at both ends of the connecting member 21.