JPH02278013A - Coupling device - Google Patents

Abstract

PURPOSE:To prevent the generation of abnormal oscillations by forming grooves in an axial direction and a tapered part which inscribes a guide part and holds a shaft with a contraction diameter are formed on a holding means which engages with both sides of a main body through the guide part, and making the shaft centers of driving and driven shafts coincide each other. CONSTITUTION:A tapered part 22 on which grooves 21 are formed, a screw part 24 which engages with a nut 40, and a hollow part 25 into which a shaft 50 is inserted are formed on a holding means 20, while a guide part 22 provided with grooves 31, 32 each one end of which being released, a flange part 34, and a hollow part 35 which engages with the tapered part 22 are formed on a slider 30. A main body 10 is made up of an end frame part 11 and a cylindrical spring 12. An installation part for installing the cylindrical spring 12 by means a screw 16 and a screw 13 are provided on the frame part 11, and a sub-assembly body S is composed of the holding means 20, the slider 30 and the nut 40. The shaft centers of driving and driven shafts 50, 60 coincides each other at installation, to prevent the generation of abnormal oscillations, improve durability of the device, prevent the generation of noises.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application J] This invention relates to a coupling device for connecting a drive shaft of two motors or the like to a driven wheel of a machine tool or the like.

[Prior art 1] A conventional example of this product device is shown in FIGS. 4 and 5.
In this coupling device, a boss b to which a drive shaft a is attached and a boss d to which a wave axis C is attached are connected by a plate spring e disposed in the middle, and each boss b, d has a As shown in FIG. 5, a groove f is formed in a part of the shaft mounting portion, and the shafts a and C are fixedly connected by tightening screws g on both sides of the groove f.

[Problem to be solved by the invention J] By the way, in the case of the above structure, when installing each axis a and C,
It is tightened at one location on its outer periphery in a direction perpendicular to its axial direction. Therefore, since the inner diameters of the bosses b and d change as the screw g is tightened, if the diameters of the axes a and C change, their axes will differ. As a result, abnormal vibrations during rotation may reduce durability and generate noise. In addition, it was necessary to prepare coupling devices of various sizes for each diameter of the shaft to which the coupling device was attached, so when attaching coupling devices of various shaft diameters with each other, a large number of coupling devices were required. It was uneconomical.

Therefore, an object of the present invention is to provide a coupling device that can solve these problems.

[Means for Solving the Problems] The coupling device according to the present invention has the above features! ! In order to solve this problem, the main body is provided with a substantially cylindrical shape, a hollow holding member fitted on both sides of the main body, and a guide portion disposed on the outer peripheral side of the holding member. forming a tapered part at one end and forming a split groove in the axial direction, and inscribing the tapered part in the guide part;
The present invention is characterized in that the diameter of the tapered portion is reduced by relative movement between the holding member and the guide portion, so that the end portion of the shaft member accommodated within the holding member can be held.

[Operation of the invention] The holding members are fitted onto both sides of the main body, and the shaft is inserted into the hollow part of each holding member with the tapered part inscribed in the guide part disposed between the holding member and the main body, When each holding member and the guide portion are moved relative to each other in the axial direction, the diameter of the tapered portion of each holding member is reduced.

Closely held at each shaft end within the hollow portion. Therefore, by fixing each holding member to the main body, each shaft is connected to the coupling device with its axes aligned.

[Embodiment] An embodiment is shown in FIGS. 1 to 3. FIG. 1 is an exploded view of a coupling device, which includes a main body 10. The holding member 20°, the slider 30, and the nut 40. this house.

The holding member 20, slider 30, and nut 40 form a subassembly S and are attached to both sides of the main body 10. however,
In FIG. 1, the sub-assembly body S on one side is omitted. In addition, the reference numeral 50 in Figure 1 is a drive shaft connected to the power side of a motor etc., and 60 is a driven shaft connected to the driven side of a machine tool etc.
Attach to I9.

The main body 10 has frame portions 11 on the left and right sides. It has a substantially cylindrical shape with a spring tube 12 in the middle of which is a cylindrical plate spring. A pair of screws 13 are attached to the side surfaces of the frame portion 11 so as to be able to move forward and backward to positions facing each other by 180 degrees. Also, the left and right frames!
! Ill uses the same members symmetrically (!1
In Figure 12, one side is rotated 180°)
A mounting portion 14 is formed extending inward from the spring tube 12 from a part of the periphery of the frame portion 11 . A spring 111 is attached to the mounting part 14.
A screw hole is formed in advance at a position corresponding to a screw 16 attached to a nut 15 provided on the frame 12, and the mounting portion 14 of the frame portion 11 and the spring cylinder 12 are integrated with the screw 16. Reference numeral 17 indicates openings on both sides of the main body 10, into which the subassembly body S is fitted.

The holding member 20 has a shape similar to a collet chuck used in a lathe, etc., and one end has a tapered part 22 with a split groove 21 formed therein.
In No. 1, the tightening direction is inclined upward and forward toward the direction indicated by the arrow A in FIG. 3. The tapered portion 22 is formed with a recess 23 into which the tip of the screw 13 engages. A threaded portion 24 is formed on the outer periphery of the other end of the holding member 20 . Reference numeral 25 is a hollow portion into which the driven shaft 50 or the driven wheel 6o is fitted.

The slider 30 includes a guide portion 33 having a split groove 31 and 32 with one end open, and a flange 34 at one end.The slider 30 is wide enough to allow the screw 13 to pass through. ing. Reference numeral 35 is a hollow portion into which the holding member 2o is fitted.

FIG. 3 is an enlarged view showing the holding member 20 and the slider 3o in approximately half section, and exaggerating the inclination of the tapered portion, as is clear from this figure.

The guide portion 33 has a tapered portion that slopes forward and upward with respect to the tightening direction, corresponding to the tapered portion 22.

By the way, the holding member 2o is guided into the hollow part 35 of the slider 3°! 33+III, and its threaded part 24
protrudes outward from the flange 34.

The nut 40 has a screw 41 formed on its inner periphery to engage the screw 111124, and can come into contact with the outer surface of the flange 34.

Next, the operation of this embodiment will be explained. First, the holding member 20
Fit the threaded portion 24 side of the slider 30 into the hollow portion 35 of the slider 30,
The nut 40 is lightly engaged with the threaded portion 24 protruding from the flange 34. At this time, the recess 23 of the holding member 20 faces into the slot 31 of the slider 30. In this way, the sub-assembly S (see FIG. 1) in which the holding member 20 to the nut 40 are integrated is fitted into the frame portions 11 located at both ends of the main body 10, respectively. At this time, when the split groove 31 is aligned with the screw 13, the screw 13 becomes a guide and the guide portion 33 is easily fitted into the frame ill. Therefore, screw 1
Screw in 3 and make the tip protrude into 25 to make a concave @1123
engage with. As a result, the holding member 20 is attached to the two screws 1.
3, it is in a state where it is floatingly supported within the frame portion 11 at two points so as to be immovable in the axial direction.

Then, the drive shaft 50 and the driven shaft 60 are fitted into the hollow portion 25, respectively, and the nut 40 is tightened. Then, since the holding member 20 is fixed with the screw 13, the slider 30 side is the frame part 1! Move forward inward. As a result, the third
As shown in the figure, the taper f! 1122 is the guide part 33
As a result, it deforms in the radial direction from the initially spaced state and tightens closely to the outer periphery of the drive shaft 50 or driven shaft 60.

On the other hand, the guide portion 33 opens outward due to the tapered portion 22 and comes into close contact with the inner surface of the frame portion 11. As a result, the sub-assembly body S is attached to the inner surface of the frame portion 11 immovably in the axial direction, and at the same time, the drive shaft 50 and the driven wheel 60 are also immovable, and the main body 10
connected via.

At this time, due to the axial movement of the slider 30, the entire circumference of the holding member 20 is uniformly reduced in diameter toward the center, so that the drive shaft 50 (driven wheel 60) is aligned with the axis of the tapered portion 22 and the main body 10. It is held in a fixed position.

If the drive shaft 50 rotates in this state, the main body 10 and the driven shaft 60 will also rotate around the same common axis, so no abnormal vibration will occur. Therefore, when one rotation is transmitted, the main body 10g5 Unreasonable force is not applied and the durability of the device is improved. Moreover, silent operation without noise can be achieved. At this time, even if some axial vibration occurs in the drive shaft 50, this axial vibration can be absorbed by the floatingly supported holding member 20.

To remove the shaft, first remove the nut 40 and loosen the screw 13 to disengage the recess 23, then push the holding member 20 inside the main body 10, and the holding member 20 can be removed from the slider 30. out, the tapered part 22 opens,
Since tightening the drive shaft 50 or the driven shaft 60 releases the condition, the drive shaft 50 or the driven shaft 60 can be easily and quickly removed.

Furthermore, if holding members 20 of various sizes with different inner diameters of the hollow portions 25 are prepared in advance, when replacing and attaching various types of shafts with different diameters, it is sufficient to replace the holding members 20, unlike the conventional method. It is economical because there is no need to prepare a large number of coupling devices.

Note that the present invention is not limited to the above-mentioned embodiments, and can be applied in various ways. For example, the holding member 20 may be made into a push-in type by reversing the slope of the tapered portion 22. Further, the slider 30 side can also be moved in the axial direction. In this case, the slider 30 may be omitted and the guide portion 33 may be formed directly on the inner surface of the frame portion 11.

[Effects of the Invention] According to the present invention, a holding member is fitted to both sides of a substantially cylindrical main body via a guide part, a tapered part is formed in the holding member to be inscribed in the guide part, and a tapered part is split into this tapered part. Since the groove is provided and the diameter of the tapered part can be reduced by relative movement between the holding member and the guide part, the shaft can be attached by relatively moving the holding member or the guide part in the axial direction. In addition, the drive shaft and driven wheel can be installed so that their axes are aligned, which prevents abnormal vibrations. As a result, the durability of the device can be improved and quiet operation can be realized.

Moreover, when replacing and connecting many types of shaft members with different diameters, it is economical because only the holding members and the like need to be partially replaced.

[Brief explanation of drawings]

Figures 1 to 3 show this, and Figure 1 is a developed view. FIG. 2 is a sectional view, and FIG. 3 is an enlarged schematic half-sectional view of the main part. FIG. 4 is a cross-sectional view of the conventional example, and FIG. 5 is a view showing the coupling device along the line XX in FIG. 4. (Explanation of symbols) 10... Main body, 20... Holding member, 21... Division groove. 22...Tapered part, 24.41...Threaded part. 30...Slider, 33...Guide portion, 40-Nut, 50...Drive shaft.

Claims (1)

[Claims] The main body has a substantially cylindrical shape, a hollow holding member fitted on both sides of the main body, and a guide portion disposed on the outer peripheral side of the holding member, and a tapered portion is provided at one end of the holding member. A split groove is formed in the axial direction, and the tapered part is inscribed in the guide part, and the diameter of the tapered part is reduced by relative movement between the holding member and the guide part, so that the tapered part is accommodated in the holding member. A coupling device characterized in that the end of a shaft member can be held.