JPH08210371A - Aligned coupling device - Google Patents

Abstract

PURPOSE: To provide an aligned coupling device capable of strictly observing the uniform aligned tightening of each shaft end and its tightening procedure, and simplifying th assembly and disassembly works. CONSTITUTION: An aligned coupling device is provided with pressure cylinders 12A, 12B on each side of a sleeve 12 to cover shaft ends 10A, 11A opposite to each other, a collar 13 capable of being shifted in the axial direction is fitted to the outer circumferential surface of the sleeve, and a pair of taper rings opposite to each other are fitted to each outer circumference of the pressure cylinders. Press rings 18, 19 are freely fitted to the outer circumference of each pressure cylinder to be engaged with taper rings 14, 15, 16, 17, and the collar of each press ring is pulled from each side by a tightening bolt of a tightening means to press a pair of taper rings, and the inner circumferential side of the pressure cylinder is press-fitted in an aligned manner to each shaft end opposite thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft joint for a machine tool shaft or the like, and enables uniform centering and tightening of both shaft ends, strict adherence to tightening procedures, and simplification of assembly work and disassembly work. Involved in what was done.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open No. 52-112042 has been proposed as a rotary shaft coupling for a shaft of a machine tool or the like.
As shown in FIG. 7, this Japanese Patent Laid-Open No. 52-112042 discloses that "a sleeve that covers mutually facing shaft ends and has a compressible surface on these shaft ends, has a conical surface and has a conical surface for compressing the sleeves. In a frictionally acting friction shaft coupling provided with a pressing ring that is movable in the axial direction by tightening bolts in the opposite direction, the sleeve (1) has a pressing ring (2) having a conical surface (2a) formed on each side. 2) has corresponding conical surfaces (1a) for fitting respectively, and in the middle range,
It has a collar (1c) with a threaded hole (1b), and a tightening bolt (3) for each of the pressing rings (2) is retained in this collar (1c). "

As a result, it can be used as a shaft coupling which is formed only from the sleeve and the two pressing rings and is therefore easily assembled and structurally simple. Since the relatively thin sleeve designed to match the torque to be transmitted through the cross-sectional area adjacent to the collar is easily deformed, the tightening force generated in the axial direction is generated between the sleeve and each shaft end. It has the advantage that it can be used directly for the resulting surface pressure.

[0004]

However, in the friction shaft coupling disclosed in JP-A-52-112042, etc.,
As shown in FIG. 7, the contact pressure generated between the peripheral surfaces of each conical surface (1a) of the sleeve 1 and each shaft end 6, 6a is
1, imbalance occurs like F2. This is the conical surface (1a) of the sleeve 1 and the conical surface (2a) of the pressing ring (2).
It occurs when and are not evenly contacted over the entire surface. This adverse condition is combined with the fact that the conical surfaces (1a) and (2a) are in contact with each other over a wide area, and the conical surface (1
The main cause is that the thin end portions a) and (2a) are more likely to be elastically deformed.

Further, at the time of disassembling work for removing the pressing ring (2) which is a friction shaft joint and the sleeve 1 from the respective shaft ends 6, 6a, the bolts 3 ... To remove the two pressing rings (2) from the sleeve 1. There is a problem in that the work of removing the from the collar (1c) is involved, and simple removal work is not enough.

In view of the problems of the above-mentioned conventional friction shaft coupling, the present invention makes it possible to perform uniform centering and tightening of both shaft ends, strictly adhere to the tightening procedure, and simplify the assembling work and the disassembling work. An object is to provide a joint device.

[0007]

In order to achieve the above-mentioned object, the present invention provides a sleeve for covering opposite shaft ends with pressure gripping cylinders on both sides, and an outer peripheral surface of the sleeve is provided. An axially movable collar is fitted and a tapering ring surface provided on each outer circumference of the pressure gripping cylinder and two pressing rings are loosely fitted on each outer circumference of the pressure gripping cylinder, and the inner peripheral surface of this pressing ring is fitted. And the pressing rings are pulled from both sides by fastening means to press the pair of tapered rings so that the inner side of the gripping cylinder faces each other. It is an aligning shaft coupling device characterized by aligning pressure contact with a shaft end.

According to a second aspect of the invention, in the first aspect, a collar retaining projection ring is bulged toward one side of the outer peripheral surface of the sleeve, and the collar is screwed and pulled by the pressing ring on the protrusion ring side. The aligning shaft coupling device is characterized in that the rings oppose each other.

[0009]

According to the first aspect of the present invention, the opposite ends are inserted into the sleeve in which the collar is fitted in the middle abdomen. After this,
The pressing rings, which are loosely fitted to both shafts in advance, are moved toward the pressure gripping cylinders at both ends of the sleeve. By this movement, the taper ring surface fitted to the pressing ring and the taper ring surface fitted to the pressure grip cylinder are pressure-bonded, and the fastening bolts passed through the press rings on both sides are tightened at the same time. By the above tightening operation, each pressing ring is pulled toward the collar side, and the pair of taper ring surfaces are pressed toward the center side. The pressing force is generated as a throttle displacement toward the center side with respect to the pressure gripping cylinder, and a uniform tightening force is generated on the entire peripheral surface, so that both shaft ends are uniformly centered and gripped over the entire circumference.

According to the second aspect of the present invention, the opposite shaft ends are inserted into the sleeve in which the collar is fitted in the abdomen. Next, the fastening bolts passed through the pressing ring on the protruding ring side on the sleeve are screwed into the collar, and they are tightened so as to approach each other. By the above tightening operation, the projecting ring restrains the movement of this collar. Here, when the fastening bolts of the pressing ring are further tightened, the pressing ring is pulled by the fastening bolts and slightly moves toward the collar side, thereby strongly pressing the pair of taper ring surfaces toward the center side. The pressing force is generated as a throttle displacement toward the center side with respect to the pressure gripping cylinder to uniformly generate a tightening force on the entire peripheral surface thereof, so that the shaft end on one side is aligned and gripped. Next, when the pressing ring on the other side is screwed into the collar with a fastening bolt and tightened, the pressing ring is pulled toward the collar side, and the pair of taper ring surfaces are strongly pressed toward the center side. The pressing force also causes the pressure gripping cylinder to generate a tightening force that acts on the entire peripheral surface as a throttle displacement toward the center side, uniformly holds the shaft ends on the other side, and aligns both shaft ends. The operation of the shaft coupling ends.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. 1 and 2 are overall sectional views showing respective embodiments of the centering shaft coupling device according to the present invention, and FIGS. 3 and 4 are sectional views showing an assembling procedure of the centering shaft coupling device according to the present invention.

In the first embodiment shown in FIG. 1, an aligning shaft coupling device 100 is adopted for connecting a motor shaft and a ball screw shaft, etc., and shaft ends 10A, 11 of opposite shafts 10, 11 are adopted.
The sleeve 12 covering A has pressure gripping cylinders 12A and 12B on both sides thereof, the thickness of which is thin so that the diaphragm can be displaced. An axially movable collar 13 is fitted on the outer peripheral surface 12C of the sleeve 12, and the pressure gripping cylinder 1
A pair of taper rings 14, 15 and 16, 17 facing each other are fitted to the outer peripheries of 2A and 12B, and pressing rings 18 and 19 are loosely fitted to the outer peripheries of the pressure gripping cylinders 12A and 12B. Taper rings 14, 15 and 16, 17
The taper ring surfaces are engaged with each other. Further, the pressing rings 18 and 19 are connected to the fastening bolts 20 and 21 of the fastening means.
By pulling the collar 13 from both sides, the pair of taper rings 14, 15 and 16, 17 are pressed toward the center side. The pressing force is applied to the pressure gripping cylinder 12.
Aperture displacement toward the center side with respect to A and 12B acts on the entire peripheral surface, and tightening forces F1 and F2 (F1 and F2 are the same value)
Generate.

Further, the pressure-holding cylinders 12A and 12B are provided with the tightening forces F1 and F2 evenly on the entire peripheral surface as the throttle displacement toward the center side, so that the inner peripheral sides of the pressure-holding cylinders 12A and 12B are moved. Alignment pressure contact is made from the entire circumference to the opposite shaft ends 10A and 11A.

Next, the aligning shaft coupling device 200 in the second embodiment shown in FIG. 2 will be described. The aligning shaft coupling device 200 of the second embodiment has almost the same configuration as that of the aligning shaft coupling device 100 of the second embodiment, but the outer peripheral surface of the sleeve 12 is shifted to one side (in the drawing, It is characterized in that the protruding ring 12D that locks the left movement of the collar 13 is bulged on the left side). That is, the pressing ring 18 on the side of the protruding ring 12D
From the collar 13 to the screw hole 13A ...
When the fastening bolt 20 of the book pulls the collar 13 while moving it to the left, the projecting ring 12D restrains the movement of the collar 13. Here, when the fastening bolt 20 of the pressing ring 18 is further tightened, the pressing ring 18 is pulled by the fastening bolt and approaches the collar 13, and the pair of taper rings 14 and 15 are pressed toward the center side. ing. The compression force is
As a diaphragm displacement toward the center side with respect to the pressure grip cylinder 12A, it acts on the entire peripheral surface thereof to generate a tightening force F1, and the left side shaft 10 is aligned and gripped.

Here, the pressing ring 19 on the right side is, for example, 3
With the fastening bolts 21 of the book, the screw holes 13 of the collar 13 are
When it is screwed into B and tightened, the pressing ring 19 is pulled to the left side to press the pair of taper rings 16 and 17 toward the center side. The pressing force is the pressure gripping cylinder 1.
Also in 2B, a tightening force F2 acting on the entire peripheral surface is generated as a throttle displacement toward the center side, and the right-side shaft 11 is also aligned and gripped.

Each of the embodiments of the present invention is configured as described above and operates as follows. First, in the first embodiment, as shown in FIG. 3, shaft ends 10A and 11A of both shafts 10 and 11 facing each other inside a sleeve 12 in which a collar 13 is fitted in a middle abdomen.
Insert. Thereafter, the pressing rings 18 and 19 preliminarily fitted on the shafts 10 and 11 are attached to the pressure gripping cylinders 12 at both ends of the sleeve 12.
Move toward A and 12B. With this movement, the pressing ring 1
As shown in FIG. 1, the taper rings 15 and 17 fitted in the inner step holes 18A and 19A of 8 and 19 and the taper rings 14 and 16 fitted to the step portions of the pressure gripping cylinders 12A and 12B are pressure-bonded as shown in FIG. Fastening bolts 20 inserted through the pressing rings 18 and 19 of the
, 21 ... simultaneously with screw hole 1 of collar 13
3A, 13B is screwed and tightened. By the above tightening operation, the pressing rings 18 and 19 are pulled toward the collar side, and the pair of taper rings 14, 15 and 16, 17 are pressed toward the center side. The pressing force acts on the entire peripheral surface of the pressure gripping cylinders 12A and 12B as a diaphragm displacement toward the center side, and generates tightening forces F1 and F2. As a result, the pressure gripping cylinder 12
A and 12B are both shaft ends 10A facing each other on the inner peripheral side,
Grip the 11A evenly from the entire circumference.

Therefore, as shown in FIG.
A and 12B are tightening forces F1 as a diaphragm displacement toward the center.
F2 is evenly generated on the entire circumferential surface. As a result, the pressure gripping cylinders 12A and 12B have an effect that the inner peripheral sides can be uniformly aligned and gripped on both shaft ends 10A and 11A facing each other from the entire circumference. Further, the disassembling work of the centering shaft coupling device 100 that holds the centering shafts 10A and 11A at both ends is performed by the bolt 20 that fastens at least one pressing ring 18 or 19.
Or, if 21 is loosened, the taper rings 14, 15 and 16, 17 on both sides are loosened all at once, and there is an effect that the centering gripping force on both shaft ends 10A, 11A of the pressure gripping cylinders 12A, 12B is released.

Next, the aligning shaft coupling device 20 of the second embodiment.
0 is shown in FIGS. First, the shafts 10 and 11 facing each other in the sleeve 12 in which the collar 13 is fitted in the middle abdomen.
The shaft ends 10A and 11A are inserted. After this, as shown in FIG. 4, for example, three fastening bolts 20 passed through the pressing ring 18 on the side of the projecting ring 12D are screwed into the screw holes 13A ...
And screw the two together, making them close to each other. In the tightening operation, when the collar 13 is pulled while being moved leftward, the projecting ring 12D restrains the movement of the collar 13. Here, when the fastening bolt 20 of the pressing ring 18 is further tightened, the pressing ring 18 is pulled by the fastening bolt 20 and slightly moves toward the collar 13 side, and the pair of taper rings 14, 15
Is strongly pressed toward the center. The pressing force evenly generates a tightening force F1 on the entire circumferential surface of the pressure grip cylinder 12A as a throttle displacement toward the center side, and evenly grips the left shaft end 10A.

Here, as shown in FIGS. 4 and 5, when the pressing ring 19 on the right side is screwed into the screw hole 13B of the collar 13 by, for example, three fastening bolts 21 and tightened, the pressing ring 19 is left sided. Pulled to, a pair of taper rings 1
6 and 17 are pressed strongly toward the center. The pressing force also causes the clamping cylinder 12B to generate a clamping force F2 acting on the entire circumferential surface as a throttle displacement toward the center side, and the right shaft end 11A.
Is evenly gripped, and the operation of the centering shaft coupling of both shafts 10 and 11 is completed.

Therefore, as shown in FIG.
A and 12B are tightening forces F1 as a diaphragm displacement toward the center.
F2 is evenly generated on the entire circumferential surface. As a result, the pressure gripping cylinders 12A and 12B have an effect that the inner peripheral sides can be uniformly aligned and gripped on both shaft ends 10A and 11A facing each other from the entire circumference. Further, as shown in FIG. 2, the disassembling work of the centering shaft coupling device 200 for holding the centering shafts 10A and 11A at the center of the center is carried out by bolts 20 that fasten the pressing ring 18 on the left side.
Loosen the taper rings 14, 15 and 16, 1 on both sides
7 loosen all at once, and both shaft ends 10 of the pressure gripping cylinders 12A and 12B
There is an effect that the centering grip force for A and 11A is simply released.

Further, an aligning shaft coupling device 2 for the shaft ends 10 and 11
When attaching 00, it suffices to first have the protruding ring 12D of the sleeve 12 on the shaft end side to be tightened, which has the effect of being able to specify the tightening side. This is an effect of facilitating the tightening / removing work since the aligning shaft joint device 200 can be tightened in a wide external space at least on one side of the shaft end joint work in a narrow machine. There is.

The present invention is not limited to the above-mentioned two embodiments, and it is possible to change the design in details within the scope of the invention. For example, the number of tightening bolts 20 and 21 is not limited to the above configuration, and other detailed partial configurations can be freely designed and changed. A pair of taper rings 14, 15 and 16,
The reference numeral 17 designates directly the pressure gripping cylinders 12A, 12B and the pressing ring 18,
It may be provided as an integral taper surface (taper ring surface) at the essential part of 19, and if this is done, the separate taper rings 14, 15 and 16, 17 become unnecessary.

[0023]

According to the first aspect of the present invention, the pressure gripping cylinder of the sleeve has an effect that the inner peripheral side of the sleeve can be uniformly aligned and gripped on both shaft ends facing each other from the entire circumference. Furthermore, when disassembling the centering shaft joint device that holds the centering shafts on both ends, loosen the bolts that fasten the pressure ring on one side at the same time to loosen the taper rings on both sides at the same time. This has the effect of simply releasing the centering grip on the edges.

According to a second aspect of the present invention, in addition to the effect of the first aspect, when attaching the aligning shaft coupling device to the shaft end, hold the projecting ring of the sleeve on the shaft end side to be tightened first. It is good enough, and it has the effect of the function that can specify the tightening side. This is because, in the shaft end joint work in a narrow machine, the centering shaft joint device can be tightened in a wide external space at least on one side of the shaft end, so that the tightening / removing work can be easily performed. is there.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of an aligning shaft coupling device according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of an aligning shaft coupling device according to the present invention.

FIG. 3 is a sectional view showing an assembling procedure of the centering shaft coupling device according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing an assembling procedure of the centering shaft coupling device of the second embodiment according to the present invention.

FIG. 5 is a sectional view showing an assembling procedure of the aligning shaft coupling device of the second embodiment according to the present invention.

FIG. 6 is a perspective view showing a tightening force applied to the centering shaft coupling device of the present invention.

FIG. 7 is a cross-sectional view of a conventional centering shaft coupling device.

[Explanation of symbols]

 10, 11 Shafts 10A, 11A Shaft ends 12 Sleeves 12A, 12B Pressure gripping cylinder 12D Projection ring 13 Collars 13A, 13B Screw holes 14, 15, 16, 17 Taper ring 18, 19 Pressing ring 20, 21 Tightening bolts F1, F2 Tightening force 100,200 Aligning shaft coupling device

Claims (2)

[Claims] 1. A sleeve for covering both shaft ends facing each other has pressure gripping cylinders on both sides thereof, and an outer circumferential surface of the sleeve is fitted with a collar movable in the axial direction. And the taper ring surface provided on the inner peripheral surface of the pressure ring with which the two press rings are loosely fitted to each outer circumference of the pressure grip cylinder, and the press rings are further fastened. An aligning shaft coupling device, wherein the collar is pulled from both sides by means to press the pair of taper ring surfaces to bring the inner peripheral side of the pressure gripping cylinder into centering pressure contact with opposite shaft ends. 2. A collar according to claim 1, wherein a protruding ring for locking the collar is bulged toward one side of the outer peripheral surface of the sleeve, and the protruding ring opposes the pulling of the collar by the pressing ring on the protruding ring side. Aligning shaft coupling device.