JPH04165120A - Flexible coupling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a leaf spring type flexible coupling,
The present invention relates to a coupling that can sufficiently absorb declination angle and axial displacement, and can also take large eccentricity, that is, parallel displacement.

[Prior art]

Many plate spring type joints are used in measuring instruments, machine tools, robots, etc. with high precision and no backlash of 1 herk. Such a leaf spring type shaft joint is one in which one or two leaf springs are connected by bolts and nuts via a spacer between a pair of flanged hubs, each of which has a driving shaft and a driven shaft. It is. This leaf spring is arranged so that its axis substantially coincides with the axis of the rotating shaft.

That is, a rectangular leaf spring having a hole in the center is arranged perpendicular to the axis. Therefore, although it is possible to take a certain degree of declination and axial displacement, there is a drawback that eccentricity, that is, parallel displacement can hardly be taken. Therefore, if there is a relatively large eccentricity, there is a drawback that rotation between the coaxial shafts cannot be transmitted smoothly, and there is a risk of damaging the bearings of both shafts.

In addition, if eccentricity, that is, directional displacement, is required, a leaf spring parallel to the axis may be installed, but a spring that can be easily removed with a convection is manufactured. It was extremely difficult to do so.

Moreover, in addition to being small, such a coupling must also have a small moment of inertia so that it can rotate at high speeds. Furthermore, it needed to have excellent rotational balance and no vibration even during high-speed operation, and seven, it needed to have a strength corresponding to ζ'-minute of the transmitted torque and be able to transmit it efficiently.

[Means to solve the problem]

Therefore, an object of the present invention is to provide a flexible coupling that is easy to manufacture and can sufficiently absorb eccentricity in addition to deflection angle and axial displacement.Furthermore, in addition to being compact, it has a small moment of inertia. The target is one that has excellent rotational balance, does not cause vibration even during high-speed operation, and has sufficient strength for transmission.
In order to achieve this goal, we will adopt the following structure.

Therefore, a bending molded body (L) of a metal plate having a rigidity
, a pair of first intermediate body 5 and first intermediate body [ ; are provided 1 , which are arranged in the axial direction on both edges of the flat curved part j and the flat part 1 perpendicular to the axis. Folded inner sleeve 2
1, and holes 4 are formed in each of the peripheral edge of the flat part 1 and the two cores of both sleeves to accommodate pairs of leaf springs.

Furthermore, both intermediates 5. (First leaf springs 8 are arranged in one row on the plane part l between the two. The first leaf springs 8 are connected to the edges of each pair of wires G perpendicular to each other around the axis. At the part, the said attachment l is attached to the flat part 1 of each said intermediate body 5.6.
It is fixed via a fixing member 7 inserted through the hole 4.

Further, both ends of the second temporary spring 9 are fixed to the pair of holes 4 of each sleeve part 2 via the fixing part 7. The second plate spring 9 is characterized in that the center portion thereof is configured so that it can be attached to the hub several times.

(Function) According to this coupling, the first leaf spring 8 can sufficiently absorb the conventional deflection angle and axial displacement, and the presence of the second leaf spring 9 can absorb relatively large eccentricity. .

Furthermore, the first intermediate body 5 and the second intermediate body 6 to which the drawing plate springs are attached are formed by bending metal plates, and the holes 4 are used to attach fixing members to the flat part 1 and both sleeve parts 2. Each leaf spring 8, 9 can be easily removed by inserting 7 through 1.
This coupling is easy to assemble and has high mass productivity.

Furthermore, since the mounting portion of the second leaf spring 9 is formed by bending the metal plate in each of the intermediate bodies 5 and 6, the moment of inertia of the area is relatively oriented as the metal plate is bent, and the In addition to increasing the strength, the moment of inertia can quickly stop the rotation with a small amount. Moreover, it has excellent rotational balance and produces 41 vibrations less even during high-speed operation.

〔Example] Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is an exploded explanatory view of the present coupling, FIG. 2 is a positive mI diagram showing the assembled state of the coupling, and FIG. 3 is a blood cut diagram taken along the line III-DI in FIG.

As shown in FIG. 1, the main parts of this coupling include a pair of first and intermediate bodies 5 and second intermediate bodies 6 of the same shape, and a first plate disposed between them. Spring 8 and
It consists of nine second leaf springs 9. These main parts are preferably formed from stainless steel plates by press working.

Therefore, first, the first intermediate body 5 is made by bending both edges of a substantially disc-shaped stainless steel plate having a thickness of about 0.7 mm to 2 fflI11 to form a pair of sleeve portions 2 on both sides. , a notch 21 is provided in the center of the sleeve 2. The cutout portion 21 of the cylindrical portion 21 is 4, in order to place the end of the hub 3, which will be described later, as close as possible to the 1-face portion 1 of each intermediate body 5°0. In other words, the outer periphery of the hub 3 is prevented from interfering with the sleeve portion 2.

Moreover, a center hole 10 is bored on the axis of each intermediate body 5.6. This center hole 10 is bored to be larger than the shaft diameter of a pair of rotating shafts to be connected to the present coupling.

Further, a pair of mounting holes 4 are drilled at both edges of the sleeve portion 2, respectively. At the same time, a pair of mounting holes 4 are bored in both edges parallel to the sleeve part 2 and passing on the center line of the flat part 1. For these attachments, the hole 4 is bored with an inner diameter that matches the cuff of the fixing member 7, which is a caulking pin having a head at one end.

Next, as an example, the first plate spring 8 has a plate thickness of 0.1 to 0.1 mm.
It is made of a disc-shaped or square stainless steel plate with a diameter of about 5 mm, and a central hole 10 is bored in the center thereof. At the same time, the flat parts 1 of the first intermediate body 5 and the second intermediate body 6 are attached to four attachment points at positions aligned with the holes 4 at the peripheral edges on the same radius separated by 90 degrees from the center, respectively. A hole 4 is formed in each case.

Next, the opening second leaf spring 9 is formed into a wide bow shape, and the holes 4 or the pair of sleeves 2 of the second intermediate body 6 are connected to the holes 4 or the sleeves 2 of the first intermediate body 5 and the second intermediate body 6. The mounting holes are drilled in alignment with the holes 4, respectively. Further, a mounting hole 4 is bored in the central tip of the second leaf spring 9.

The main part of the flexible coupling of the present invention constructed as described above is such that a pair of intermediate members 5.6, a first temporary spring 8, and an open second leaf spring 9 are preliminarily connected to the fixing member 7 and In this embodiment, it is fastened and fixed by caulking means via the washer 18. Then, the tips of the second leaf springs 9 are fastened and fixed via screws 16 to the outer periphery of the hub 3 into which the tips of the drive shaft and driven shaft that are to be connected to each other are fitted. .

Therefore, a method for assembling the main parts of the coupling of the present invention will be described.

First, a pair of the first intermediate body 5 and the second intermediate body 6 are arranged back to back so that their positions are different from each other by 90 degrees around the axis of rotation, and the respective plane parts 1 are positioned in parallel. A first plate spring 8 is interposed between them, and a washer 18 (the periphery of which is slightly chamfered) is provided between the first plate spring 8 and the first intermediate body 5 and the second intermediate body 6, respectively.

(the same applies hereinafter) and align the respective holes with each other. In FIG. 1, the attachments located above and below the first plate spring 8 are connected to the holes 4, and the attachments located above and below the first intermediate body 5 are connected together with the holes 4 using fixing members 7 such as caulking pins. to be fixed. Similarly, the pair of attachment holes drilled on the left and right sides of the first plate spring 8 are connected to the holes 4, and the pair of attachment holes drilled on the left and right sides of the second intermediate body 6 are caulked with the fixing member 7. Fasten and fix.

Next, both ends of the second plate spring 9 are placed on the sleeve portion 2 of the first intermediate body 5 or the second intermediate body 6, and the second plate spring 9 is attached to the hole 4.
Washers 18 are placed on the front and back sides of the second leaf spring 9 so as to be aligned with each other. Then, the fixing member 7 made of a caulking pin made of stainless steel or the like is inserted into the first intermediate body 5 from the flat part 1 side, the head of the fixing member 7 is placed on a base (not shown), and the tip of the fixing member 7 is By pressing, the second plate spring 9 and the first intermediate body 5 are integrally fixed. In this way, a pair of second leaf springs 9 are fixed to the first intermediate body 5 and the second intermediate body 6, respectively.

Next, in this embodiment, the hub 3 is provided with a shaft insertion hole 12 that is aligned with the drive shaft and the driven shaft.
A slit 3 passing through the center line is formed. This hub 3 can be made of aluminum or the like, but it is of course not limited thereto.

Further, a bolt hole 15 for fastening the rotating shaft is bored in the outer peripheral surface of the hub 3 in a direction perpendicular to the slit 3, and
A pair of screw holes 14 are formed on the diameter line at the ends of the outer periphery. Further, in this embodiment, a notch 22 is formed in a part of the outer periphery of the tip end of the hub 3. This cutout portion 22 is formed so that the hub 3 does not buffer against the center portions of the sleeve portions 2 of the first intermediate body 5 and the second intermediate body 6, thereby bringing the tip of the hub 3 as close to the flat portion 1 as possible. be able to. Then, the axial length of the coupling including the hub 3 is made as short as possible (
are doing.

The screw hole 14 of the hub 3 formed in this way is aligned with the hole 4 for attaching the center tip of the second leaf spring 9, and the screw 6 is attached to both sides of the second leaf spring 9 via the screw hole 18. As a result, the second leaf spring 9 and the hub 3 are detachably connected.

Further, a fastening bolt is screwed into the bolt hole 15 of the hub 3,
By fastening them, the drive shaft and driven shaft inserted into the shaft insertion hole 12 and the hub 3 are fixed integrally. This state is shown in FIGS. 2 to 4.

That is, the driving shaft 19 and the driven shaft 20 are connected and fixed to each other by the coupling of the present invention and the pair of hubs 3.

In addition, the first and second springs 8 attached to each intermediate body 5.6
, 9 may be used by stacking a plurality of plates.

This makes it possible to transmit large torque.

〔Effect of the invention〕

The flexible force/7 ring of the present invention consists of its main components: 5. Second intermediate body 6, first leaf spring 8. Since the perforations 4 are made of a flat plate or a plate material obtained by bending the flat plate, they can be formed by press molding, and a mass-producible coupling can be provided at low cost.

Moreover, the first plate spring 8 is attached to the first intermediate body 5 and the second intermediate body 6 through the mortar hole 4 in the flat part 1 with the fixing member 7, and is attached to the second intermediate body 5 and the second intermediate body 6 by the fixing member 7. Since the fixing member 7 is attached to the sleeve portion 2 of the intermediate body 5.6 through the hole 4, assembly is easy and mass production is possible.

Furthermore, the eccentricity, which is the amount of parallel displacement, can be increased by the first leaf spring 8 disposed perpendicular to the axis and the second leaf spring 9 disposed crossing it.

That is, in addition to absorbing the conventional deflection angle and axial displacement, it is possible to increase the parallel displacement between the drive shaft and the driven shaft.

Then, accurate rotation control without backlash can be performed.

In addition, each intermediate body 5.6 is formed by bending a metal plate to form a portion for attaching the second leaf spring 9, so that the moment of inertia of the area increases dramatically as the metal plate is bent, and sufficient strength is obtained. In addition, the moment of inertia is small and rotation can be stopped quickly. Moreover, it has excellent rotational balance and does not generate vibration even during high-speed operation.

[Brief explanation of the drawing]

FIG. 1 is an exploded explanatory view of the flexible coupling of the present invention, FIG. 2 is a partially cutaway front view showing how the coupling is used, and FIG. 3 is a sectional view taken along the line 11-I in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. 1...Plane part 2...Sleeve part 3...Hub
4...1 hole 5...1st intermediate body
6... Second intermediate body 7... Fixing member 8...
・First plate spring 9...Second plate spring IO...Center hole 12...Shaft insertion hole 13...Slint■・
- Screw hole 15... Bolt hole 16... Screw 17... Fastening bolt 18... Washer 19... Drive shaft 20... Driven shaft
2L22... Katsuki Department Agent Patent Attorney Kubo B] Takumi!

Claims (1)

[Claims] Each of them is made of a bent molded body of a rigid metal plate, and has a flat part 1 extending perpendicularly to the axis, and both sleeve parts 2 bent in the axial direction at both edges of the flat part 1. A pair of first intermediate body 5 and second intermediate body 6 in which a pair of leaf spring attachment holes 4 are formed spaced apart from each other in the outer peripheral edge portion and both sleeve portions, respectively, and the plane portion between both intermediate bodies 5 and 6. A pair of edges on mutually orthogonal lines around the axis are located parallel to the plane part 1 of the first intermediate body 5, 6, respectively.
A first plate spring 8 is fixed via a fixing member 7 inserted through the attachment hole 4, and both ends are fixed to the pair of attachment holes 4 of each of the sleeve parts 2 via the fixing member 7. A flexible coupling comprising: second leaf springs 9; the central portion of the second leaf springs 9 is configured to be attached to a shaft attachment hub.