JP2018071645A - Shaft joint mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft support structure and a shaft joint mechanism which require only a small space in a shaft direction in assembling, absorb misalignment, are easy in decoupling/recoupling the shaft joint mechanism and in exchanging damaged parts, and have good maintainability.SOLUTION: A shaft joint mechanism includes: plural blocks having fastening means for fastening the blocks with one of a first disk and a second disk; an elastic intermediate disk made of an elastic body and in which groove-like recessed parts are arranged on the outer edge along the shaft direction in a radial manner from the center; and fastening means for coupling the disks and the blocks. In assembling, a first group of constitution blocks formed of plural pieces among the blocks, is coupled to the first disk on one end side by the fastening means, and also, is engaged or fitted to the groove-like recessed parts of the elastic intermediate disk on the other end side. Further, a second group of constitution blocks excluding ones in the first group, is coupled to the second disk on one end side by the fastening means, and is engaged or fitted to the groove-like recessed parts of the elastic intermediate disk on the other end side.SELECTED DRAWING: Figure 1

Description

  The present invention is an invention of a shaft coupling that facilitates replacement of a worn member of the shaft coupling and readjustment of misalignment due to aging of the casing.

  A shaft coupling is a mechanical element that connects a drive shaft and a driven shaft and transmits power. In an aspect using a shaft coupling, for example, an output rotation shaft (hereinafter referred to as a drive shaft) of a power source of an engine or a motor is rotatably supported by a drive body side housing such as a motor via a bearing. An input rotary shaft such as a pump (hereinafter referred to as a driven shaft) is also rotatably supported by a follower side housing via a bearing, and the housing is installed on a base or other foundation or body. In this case, both shafts are spaced apart and connected by a shaft coupling. Thus, misalignment that is classified into eccentricity, declination, and end play usually occurs between the drive shaft and the driven shaft. This misalignment is caused when the shaft coupling components are worn or worn even if the housing is placed and fixed on the structure such as the foundation or body and the shafts of the equipment can be precisely adjusted. If the rotating machine is placed and fixed on a shell structure such as a ship that has to have a flexible structure, it will be regenerated after operation by mechanical action from the surroundings. obtain.

  On the other hand, when the drive shaft is directly connected to the power source, in the case of the above-described misaligned shaft coupling mechanism, the vibration is propagated through the shaft coupling mechanism, and the rotating device coupled to the driven body vibrates. is there. In order to solve this problem, there is a design choice of incorporating a spring member or elastic member as a component in the shaft coupling mechanism to escape misalignment and to diffuse or absorb vibration, but a new problem that it is difficult to transmit high torque Also cause.

  Jaw Coupling employs an elastic member, but unlike Oldham's joints, it is one of the shaft coupling mechanisms realized by the above design choices that enables transmission of relatively high torque by meshing multiple jaws. It is. Patent Document 1 discloses an annular elastic member used for jaw coupling. In the coupling member embodiment of Patent Document 1, the plurality of block portions that are spaced apart on the axial concentric circle of the flange surface of the jaw coupling form gaps extending in the axial direction between the block portions (see FIG. 2 of Patent Document 1). (See), the jaw portion protruding in the axial direction formed on one shaft is sandwiched when the shaft coupling mechanism is assembled to realize the jaw coupling. At the time of assembling the coupling portion of the invention described in Patent Document 1, it is necessary to insert a protrusion formed on the axially opposed surface of the jaw coupling into the gap formed in the axial direction between the block portions. In this case, it is necessary to remove the installation of at least one of the driving body side and the driven body, and to perform overall maintenance including these housings. In this case, there is a problem in maintenance costs, or a structure such as a ship. The maintenance system is particularly problematic for exchanging worn parts and dealing with failures on offshore remote areas when used above.

US Patent Publication No. 4,034,575.

Therefore, the main problem of the present invention is a shaft coupling, which can reduce the required space in the axial direction when assembling the shaft coupling mechanism, and all misalignment three elements that are inconvenient for the coupling, such as eccentricity, declination, and end play. A shaft support structure with good maintainability that can easily absorb the frictional force, and can easily disengage the coupling mechanism from the drive shaft / driven shaft, and can be easily reconnected in a short time. It is to provide a shaft coupling mechanism. That is,
(1) A shaft coupling mechanism that can absorb all three misalignment elements that are inconvenient for shaft couplings of eccentricity, declination, and end play, and are generally inevitable.
(2) A shaft coupling mechanism that allows easy replacement of a worn portion of the shaft coupling mechanism even when the shafts on both sides are installed and fixed;
(3) A shaft coupling mechanism having a relatively large common torque even if it includes a flexible transmission member capable of absorbing vibration,
I will provide a.

The present invention that has solved the above problems is as follows.
In the first means, the first disk connected to the first rotating shaft on the drive shaft side and the second disk connected to the second rotating shaft on the driven shaft side are rotationally connected via an intermediate disk. In the shaft coupling mechanism, a plurality of blocks having fastening means with either the first disk or the second disk, and the intermediate disk has a groove-shaped recess on the outer edge along the axis method. A block comprising an elastic intermediate disk made of an elastic body arranged radially from the center and fastening means for connecting the disk and the block; The one end side is coupled to the first disk by the fastening means, and the constituent block is engaged or fitted into the groove-shaped recess of the elastic intermediate disk on the other end side, from the remaining portion excluding the first group The constituent blocks of the second group of blocks are coupled to the second disc by fastening means at one end side, and the constituent blocks are engaged or fitted into the groove-shaped recesses of the elastic intermediate disc at the other end side. It is a shaft coupling mechanism characterized by this.

  In the second means, the structure of the first means is characterized in that, at the time of disassembly, the block can be separated from the groove-shaped recess in the axial radial direction by releasing the fastening means.

  According to the third means, in the configuration of the first means or the second means, the fastening means is at least the same number as the number of the groove-shaped recesses, and is penetrated radially from the radial center of the disk at a position corresponding to the assembly. It consists of a hole, a screw hole provided in the block, and a bolt, and includes fastening means for fastening in the axial direction during assembly.

  According to a fourth means, in the configuration of the third means, the block can be separated from the groove-shaped recess in the axial radial direction.

  The fifth means includes a block in the configuration of the fourth means, wherein the elastic intermediate disk has a plurality of sheets and is engaged with or fitted in the groove-like recess to allow connection of the plurality of intermediate disks. It is characterized by that.

  The sixth means is characterized in that, in the configuration of the first means or the second means, the number of constituent blocks of the first group is three or more, and the number of constituent blocks of the second group is three or more.

  According to the seventh means, based on the configuration of the first means or the second means, at the time of assembly, the constituent blocks of the first group and the constituent blocks of the second group are alternately arranged in the circumferential direction in the groove-like recesses of the elastic intermediate disk. It is arranged.

According to the first means, the intermediate disk is provided with groove-shaped recesses radially from the diameter center along the axial direction on the outer edge, and the first disk connected to the first rotating shaft on the drive shaft side rotates. When driven, a plurality of blocks whose one end side is connected to the disk by the fastening means (this group of blocks is called a first group) rotate around the center of the disk, and the constituent blocks of the first group are the other end. Is engaged or fitted in a groove-like recess radially arranged from the center along the axial direction on the outer edge of the intermediate disk, and rotationally drives the intermediate disk, and further, the outer edge of the intermediate disk A plurality of groove-shaped recesses arranged radially from the radial center along the axial direction are connected to a second disk whose one end is connected to a second rotating shaft on the driven shaft side by fastening means. Block (a collection of this block (The second group) is engaged or fitted into a groove-like recess arranged radially from the radial center along the axial direction on the outer edge of the intermediate disk on the other end side. By rotation, the constituent blocks of the second group rotate around the center of the disk, the second disk is driven to rotate, and the driven shaft connected to the second disk is driven to rotate. The disk is made of an elastic body, and due to the elasticity of the elastic intermediate disk,
(1) It is inconvenient for shaft couplings of eccentricity, declination, and end play, and can absorb all three misalignments that are generally inevitable.
By releasing the plurality of blocks engaged or fitted in the groove-like recesses to the disk,
(2) It is easy to replace the worn parts of the shaft coupling mechanism even when the shafts on both sides are installed and fixed.
The block that transmits rotational motion is located at the outer edge of the intermediate disk, which is advantageous for torque transmission and receives the turning force of the block by the grooved concave side surface of the intermediate disk, which is an elastic body, and the elastic body receives the turning force. It is possible to make the service torque relatively large compared to
(3) Even if a flexible transmission member capable of absorbing vibration is included, the service torque is relatively large.
It is an invention that exhibits the effects (1), (2), and (3).

  According to the second means, in addition to the effects of the first means, the block separation can be separated from the groove-shaped recess in the axial radial direction by releasing the fastening means at the time of disassembly. Since the elastic body can be removed from the shaft coupling mechanism, the replacement time of the intermediate disk elastic body, which is a worn part, is reduced, and no special tool jigs are required. Even in a state in which the shaft is fixed, replacement of the worn portion of the shaft coupling mechanism becomes particularly easy.

  The third means provides an effect equivalent to the effect of the first means or the second means, and provides an effect of facilitating assembly and disassembly by simple fastening means.

  According to the fourth means, in addition to the effects of the first means or the second means, the elastic intermediate disk has a configuration of a plurality of sheets, and provides a more flexible intermediate disk elastic laminate, compared to the case of a single layer, It is suitable for a configuration that more absorbs misalignment three elements of eccentricity, declination, and end play.

  According to the fifth means, the elastic intermediate disk is made of a plastic material, is more durable than a rubber material, and can withstand a greater torque load.

  According to the sixth means, the first group of building blocks is 3 or more, and the second group of building blocks is 3 or more. Therefore, the torque load per block is shared as compared with the Oldham shaft coupling, and more. It is suitable in that it can withstand a large torque load.

  According to the seventh means, at the time of assembly, the constituent blocks of the first group and the constituent blocks of the second group are alternately arranged in the circumferential direction in the groove-like recesses of the elastic intermediate disk, and the torque load of each block is further increased. It is preferable that it becomes uniform and can withstand a greater torque load.

It is an assembly perspective view of shaft coupling mechanism 1 concerning one embodiment of the present invention. It is a front view at the time of the assembly of the shaft coupling mechanism 1 which concerns on one Embodiment of this invention. It is a side view at the time of the assembly of the shaft coupling mechanism 1 which concerns on one Embodiment of this invention. It is a rear view at the time of the assembly of the shaft coupling mechanism 1 which concerns on one Embodiment of this invention. It is an A-A 'transverse sectional view of an intermediate disk part of shaft coupling mechanism 1 concerning one embodiment of the present invention. It is a B-B 'transverse cross section of the 1st disk 3 part of the shaft coupling mechanism concerning one embodiment of the present invention. It is a C-C 'transverse cross section of the 2nd disk 5 part of the shaft coupling mechanism concerning one embodiment of the present invention. It is a front view of the intermediate disk 6 of the shaft coupling mechanism which concerns on one Embodiment of this invention. It is a side view of the intermediate disk 6 of the shaft coupling mechanism which concerns on one Embodiment of this invention. It is a perspective view of the shaft coupling mechanism 1 of the shaft coupling mechanism which concerns on one Embodiment of this invention.

<Shaft coupling mechanism of this embodiment>
The shaft coupling mechanism of the present embodiment will be described with reference to FIGS. In this specification, the “axial direction” refers to the direction in which the drive shaft and the driven shaft are arranged, and even if there is a misalignment between the drive shaft and the driven shaft and a slight shift occurs, the “axial direction” is referred to as “ “Center” refers to the center of rotation of the vertical cross section relative to the axial direction, and “radial from the center of the disk” refers to an arrangement form from the center of the cross section perpendicular to the axial direction toward the outer edge.

As shown in FIG. 1, the shaft coupling mechanism 1 is
A first disk 3 connected to the first rotating shaft 2 on the drive shaft side and a second disk 5 connected to the second rotating shaft 4 on the driven shaft side are rotationally connected via an intermediate disk 6. In the shaft coupling mechanism 1
A plurality of blocks 7 to 14 having fastening means with either one of the first disk 3 and the second disk 5;
The intermediate disk 6 comprises an elastic intermediate disk 6 made of an elastic body in which groove-shaped recesses 15 to 22 are radially arranged from the center O along the axial direction L on the outer edge;
A fastening means for connecting the disks 3 and 5 and the blocks 7 to 14;
During assembly,
A plurality of blocks 7 to 14, for example, a first block of four blocks of blocks 7 to 10, is connected to the first disk 3 on one end side by the fastening means, for example, FIG. The bolts 23 and the like, the through holes 24, the through holes formed in the blocks 7 and the like are joined by screw holes 25 and the like, and the constituent blocks 7 to 10 are connected to the elastic intermediate at the other end side. Engaged or fitted in the groove-like recesses 22, 16, 18, 20 of the disk 6,
Among the blocks 7 to 14, the second group of constituent blocks 11, 12, 13, and 14 consisting of the remaining parts excluding the first group are connected to the second disk 5 on one end side by the fastening means, for example, FIG. 1, the bolts 26, the through holes 27, the screw through holes formed in the blocks 11, etc. are connected by screw holes 28, and the constituent blocks 11 to 14 are connected to the other end side. The shaft coupling mechanism 1 is engaged with or fitted in the groove-like recesses 15, 17, 19, 21 of the elastic intermediate disk 6.

  The connection between the first rotating shaft 2 on the drive shaft side and the first disk 3 and the connection between the second rotating shaft 4 on the driven shaft side and the second disk 5 may be any connection, for example, fitting In any combination using a counter key, any connection is acceptable as long as the rotating shaft and the disk are driven to rotate integrally. As an option, a speed reduction mechanism and a clutch mechanism are arranged in the middle (not shown). As long as the rotating shaft and the disk are driven to rotate together, any connection may be used.

(During assembly)
At the time of assembly, the disks 3 and 5 are coupled to the rotary shafts 2 and 4, respectively, and the disks 3 and 5 are opposed to each other with a housing (not shown) provided with a bearing mechanism for rotatably supporting the rotary shafts. The intermediate disk 6 is inserted vertically into the gap formed from the axial direction, and the blocks 7 to 14 are inserted into the groove-like recesses 15 to 22 formed in the intermediate disk 6, and the grooves Of the blocks 7 to 14 inserted in the concave portions 15 to 22, the blocks 7, 8, 9, and 10 are selected every other block, and the first disk 3 side on the rotating shaft 2 side is the first side. The disk 3 is screwed and connected to the disk 3 by four bolts such as bolts 23. Here, the blocks selected to be connected to the drive shaft side constitute the first group. In this way, the first to seventh blocks constituting the first group are coupled to the disk 3 at one end, and the other end is inserted into the groove-shaped recesses 16, 18, 20, and 22 of the intermediate disk 6, and both are rotationally restrained. Has been. The remaining blocks 11, 12, 13, and 14 are coupled to the disk 5 by four bolts such as bolts 28 on the second disk 5 at one end of the rotating shaft 4 side. In this way, the remaining blocks excluding the constituent blocks of the first group from the entire block constitute the second group as being connected to the driven shaft side. Thus, the second group of blocks 11 to 14 are connected to the disk 5 at one end side and are inserted into the groove-shaped recesses 15, 17, 19, and 21 of the intermediate disk 6 at the other end, and both are rotationally restrained. Has been. In order to position the blocks 11 to 14 at the time of assembly, if a cross-shaped groove is formed on the inner surface of the flange of the disk 5 as shown in FIG.

  The intermediate disk 6 is made of an elastic member, and the intermediate disk 6 is an elastic intermediate disk 6 including the material. Even if the shafts of both shafts are aligned on the same axis when installing the drive shaft side housing to the driven shaft side foundation, the misalignment of eccentricity and declination still remains. However, the intermediate disk 6 is made of an elastic member, and these misalignments are absorbed by the elastic deformation of the elastic intermediate disk 6. The end play resulting from the assumed error in the separation of both shafts can also be absorbed by adjusting the positioning of the groove-shaped recess and the block in the axial direction.

  Three or more groove-shaped concave portions of the elastic intermediate disk 6 can be provided per one shaft side, and the inner surface in the circumferential direction of the groove-shaped concave portion can also be provided with three or more surfaces when viewed in the rotational direction. In consideration of the above, it is sufficient to provide the groove-shaped recess only at the outer edge of the elastic intermediate disk 6. Thus, unlike the Oldham coupling, three or more contact surfaces are provided on one shaft side, the groove-shaped recess depth is limited, and deformation of the elastic intermediate disk 6 is suppressed, so that the rotation shaft engaged with the elastic intermediate disk 6 is connected. The elastic intermediate disc torque transmission capability can be increased.

(When disassembling)
At the time of disassembly, when the elastic intermediate disk 6 is maintained, the bolt 23 on the first disk 3 side and the like can be installed without releasing the installation of the housing on the drive shaft side and the foundation on the driven shaft side. It is possible to release the four bolts, release the four bolts such as the bolts 26 to the second disk 5 at one end of the rotary shaft 4 side, and remove the elastic intermediate disk 6 together with the block. It is possible to replace a certain elastic intermediate disk 6 as it is. Thereafter, the repaired elastic intermediate disk 6 or the elastic intermediate disk replacement stock can be installed in the same manner according to the above-described setup (when assembled). 6 has the advantage that it can be removed and repaired or replaced with stock.

  Furthermore, when only one of the blocks is to be maintained at the time of disassembly, the first disk 3 side or the first disk 3 side can be installed without releasing the installation on the foundation of the housing on the drive shaft side and the foundation on the driven shaft side. It is possible to release the corresponding bolt from the disk 5 side of 2 and disengage only the block requiring maintenance from the engagement or engagement with the groove-shaped recess of the elastic intermediate disk 6 and to remove it outward in the radial direction. Only the block which is a wear member can be replaced. Thereafter, the repaired block or the block replacement stock is inserted into or engaged with the groove-shaped recess of the elastic intermediate disk 6 and bolted to the disk, as described above (during assembly). As described above, there is an advantage that the block can be removed and repaired or replaced with a stock product with a minimum space while the housing is installed on the installation site.

Thus, the shaft coupling mechanism 1 is
(1) A shaft coupling mechanism that can absorb all three misalignment elements that are inconvenient for shaft couplings of eccentricity, declination, and end play, and are generally inevitable.
(2) A shaft coupling mechanism that allows easy replacement of a worn portion of the shaft coupling mechanism even when the shafts on both sides are installed and fixed;
(3) A shaft coupling mechanism having a relatively large common torque even if it includes a flexible transmission member capable of absorbing vibration,
This is a shaft coupling mechanism.

The elastic intermediate disk may not be a single plate but may be composed of a plurality of sheets, and the block is engaged with or fitted into the groove-shaped recess through the plurality of all elastic intermediate disks, The block length may be such that a plurality of intermediate disks can be connected. Otherwise, a part of the plurality of sheets penetrates from the drive shaft side, and a part of the plurality of sheets penetrates from the driven shaft side. If there is a part that overlaps the penetration, it is sufficient for transmission, and if the length of the overlapping part is made multiple types, the elastic intermediate disk can be elastically deformed step by step, and there is an advantage that it can cope with larger misalignment is there. Furthermore, it is more economical because only the worn disk of the plurality of elastic intermediate disks needs to be replaced during maintenance. Furthermore, the distance can be adjusted by selecting the number of elastic intermediate disks, and there is an advantage that the end play adjustment of both axes can be made flexibly according to the installation site.

The elastic intermediate disk may be a rubber material, but if it is a plastic material, there is an advantage that durability is increased and transmission torque can be increased.

In the present invention, there are a plurality of constituent blocks of the first group, and two may be used as long as required transmission torque and durability can be ensured, but if it is three or more, the rotation is restrained by the block on one side, so the holding is stable, Similarly, there are a plurality of constituent blocks of the second group, and two may be used as long as required transmission torque and durability can be ensured, but if it is three or more, the rotation is restrained by the block on one side, so the holding is stable, Higher torque transmission is possible, or a more compact configuration is possible, and a design with increased durability is possible. In the invention according to this embodiment, the number of constituent blocks is the same as four, but it is not always necessary to have the same number in the first group and the second group. The natural frequencies can be different from each other, which may contribute to vibration reduction. For example, the arrangement and number of through holes for fastening the first disk and the second disk can be varied. In advance, it is possible to select 5 blocks on one side and 3 blocks on one side.

In the present embodiment, at the time of assembly, the first group of constituent blocks and the second group of constituent blocks are arranged in a groove-like concave portion of the elastic intermediate disk, four by four in the circumferential direction. Priority is given to the distribution of the stress burden of torque transmission and the leveling of misalignment absorption, which contributes to the reduction of vibration caused by misalignment and the increase in the service life of the elastic intermediate disk.

  Although the embodiment according to the present invention has been described above, the embodiment described here is described in considerable detail. However, the applicant does not intend to limit or limit the appended claims to such detailed description in any way. In addition, the present invention is not limited to such embodiments, and the part of the configuration of the invention expressed in one embodiment does not necessarily describe all combinations. Combinations of parts can be adopted as other embodiments, and can be implemented with various modifications without departing from the spirit of the present invention. In other words, the effects of the invention taken up here are not limited to appearing in one embodiment at the same time, and it is sufficient that a part of them can be manifested to achieve the object of the invention. It can be easily judged. Accordingly, the invention is broadly limited to specific details, each device and method disclosed and described herein, or combinations thereof, examples, and the spirit of Applicant's general inventive concept. It is possible to deviate from these details without departing from the scope.

  INDUSTRIAL APPLICABILITY The present invention can be used for a shaft coupling mechanism that connects two rotating shafts, and can be used for any rotary power machine such as a vehicle, a ship, a device installed in a building, a factory power device, a power generator, and the like. The present invention can be used for a shaft coupling mechanism of a general-purpose drive device that couples the drive shafts.

DESCRIPTION OF SYMBOLS 1 Shaft coupling mechanism 2 1st rotating shaft 3 1st disc 4 2nd rotating shaft 5 2nd disc 6 Intermediate disc (elastic intermediate disc)
7 to 10 First group building blocks 11 to 14 Second group building blocks 15 to 22 Groove-shaped recesses 23 and 26 Bolts (fastening means)
24, 27 Through hole (fastening means)
25, 28 Screw holes (fastening means)
L axis direction O center

Claims (7)

In a shaft coupling mechanism in which a first disk coupled to a first rotating shaft on the drive shaft side and a second disk coupled to a second rotating shaft on the driven shaft side are rotationally coupled via an intermediate disk. ,
A plurality of blocks having fastening means with either the first disk or the second disk;
The intermediate disk comprises an elastic intermediate disk made of an elastic body in which groove-shaped concave portions are radially arranged from the center along an axial direction on an outer edge;
Fastening means for connecting the disk and the block;
During assembly,
Among the blocks, a first block of a plurality of blocks is connected to the first disk by the fastening means on one end side, and the constituent block is a groove on the elastic intermediate disk on the other end side. Engaged or fitted in a recess,
The constituent blocks of the second group of the blocks consisting of the remainder excluding the first group are coupled to the second disk by the fastening means on one end side, and the constituent blocks are connected to the elastic intermediate on the other end side. A shaft coupling mechanism that is engaged with or fitted into a groove-like recess of a disk. 2. The shaft coupling mechanism according to claim 1, wherein, when disassembling, the block can be separated from the groove-shaped recess in the axial radial direction by releasing the fastening means. The fastening means comprises at least the same number of the groove-shaped recesses and a through-hole arranged radially from the center of the disk at a position corresponding to the assembly, and a screw hole and a bolt provided in the block. The shaft coupling mechanism according to claim 2, which is a fastening means for fastening in the axial direction. 3. The shaft coupling mechanism according to claim 1, wherein the elastic intermediate disk includes a plurality of blocks, and includes a block that is engaged with or fitted in the groove-shaped concave portion to connect the plurality of intermediate disks. 4. The shaft coupling mechanism according to claim 1, wherein the elastic intermediate disk is made of a plastic material. 3. The shaft coupling mechanism according to claim 1, wherein the number of constituent blocks of the first group is three or more, and the number of constituent blocks of the second group is three or more. 3. The shaft coupling mechanism according to claim 1, wherein the first group of constituent blocks and the second group of constituent blocks are alternately arranged in the circumferential direction in the groove-like recesses of the elastic intermediate disk during assembly.

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