JP2550295B2 - Conductive coupling device and shaft member used in the device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive coupling device and a shaft member used in the device.

[0002]

2. Description of the Related Art As a conductive coupling means which comprises a male joint element and a corresponding female joint element, and one of which is axially moved to form a male-female fitting, for example, a spline is used. Are known. In normal spline connection, the male spline part and the female spline part are phase-matched (that is, each key part and the corresponding key groove part are directly aligned with each other), and one of them is axially (fitting direction). It is moved to form a male and female combined state.

However, it is not easy to align the phases of both spline portions, and the tips of the spline portions are easily damaged.
Similar disadvantages exist between joint elements other than the spline joint, for example, between joint elements having a regular polygonal fitting cross section. As a technique for solving this problem in spline connection, for example, Japanese Patent Publication No. 61-47614 is known. In the technique of this publication, one tooth (key portion) of each spline portion is lengthened to reduce the probability that the tips collide with each other, and one elongated spline tooth rotates the other elongated spline tooth. In this way, the phases of both spline portions are aligned, and the engaging spline teeth are used as guides for inserting / fitting the both spline portions.

[0004]

According to the technique disclosed in the above publication, theoretically, the phase matching state of both spline portions can be formed easily and mechanically. However, in reality, due to factors such as axial misalignment and angular misalignment of both spline parts, insertion and fitting are often continued without sufficient phase matching, and as a result, the tips of both spline parts are Damage, in particular, elongated spline teeth that serve as guides are easily damaged due to a severe rubbing action.

Therefore, in the present invention, in order to solve the problem from another viewpoint based on a new idea, it is rational and economical to effectively avoid the inconvenience in the conductive coupling means including the spline coupling and the like. It is an object of the present invention to provide a simple conductive coupling device and a shaft member used in the device.

[0006]

SUMMARY OF THE INVENTION To solve the above problems, the present invention comprises a male-male fitting between a male joint element of one member and a corresponding female joint element of the other member. In the transmission coupling device that can be used, the one end of the male coupling element of the one member is supported integrally rotatably and movably in the male and female fitting direction, and is normally attached to the distal end by the biasing means. A biasing, conductively engageable leading member is provided within the female joint element, the male joint element guiding the leading member during conductive engagement of the leading member with the female joint element. It is a constructional feature that it allows a male and female fit within the female joint element.

Another aspect of the invention comprises a male fitting element,
A shaft member for use in a conductive coupling device that can be configured by male-female fitting of the male joint element and a corresponding female joint element of the other member, the shaft member being located distally of the male joint element of the shaft member. Is a leading member that can be conductively fitted in the female joint element, which is integrally rotatably supported and movable in the male and female fitting direction, and is normally biased distally by the biasing means. A male joint element is provided, which is provided, during conductive engagement of the leading member with the female joint element,
A structural feature is that the guiding of the leading member allows male and female fitting within the female joint element.

[0008]

When the leading member comes into contact with the female joint element of the other member and is pushed back to a certain extent, substantially at the same time when the both joint elements reach the angular position where they can be fitted, the leading member is
The biasing force conductively fits within the female joint element. Therefore, the male joint element smoothly fits into the female joint element by the guide of the leading member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a bed exchange type electric resistance welded steel pipe manufacturing apparatus will be described below with reference to the drawings.
The idea itself of the present invention is not limited to this,
Conductive coupling part of other equipment, for example, although not shown, a fitting / connecting part between a roll shaft and a hole on the drive side in a cold (hot) roll forming machine, a cutter mounting shaft and a drive side in a slitter device It is needless to say that the invention can be widely applied to a fitting / connecting portion with a hole portion, a connecting portion between a rolling roll shaft and a driving-side hole portion in a rolling mill, and the like.

FIG. 1 shows the forming roll stand (sizing) in the electric resistance welded steel pipe manufacturing apparatus according to the present invention.
It is the figure which looked at the principal part of the roll stand from the advancing direction side of a strip. In FIG. 1, a movable base 13 is mounted on an immovable base 11 fixed on the floor, and a plurality of stands can be collectively replaced on the movable base 13 (so-called bed exchange is possible). In addition, a stand pair which is a pair of a stand on the operator side (not shown, but present in the left direction in FIG. 1) and a stand 15 on the reducer (not shown, present in the right direction in FIG. 1) side. A plurality of pairs (for example, 1 to 4 pairs) and a plurality of side roll stands (not shown) are fixed by bolting or the like.

At the end of the stationary base 11 on the speed reducer side, an assist stand 21 corresponding to each stand pair is provided upright. The assist stand 21 holds and supports a tubular connecting member 27 connected to a universal joint 23 (only the left end portion thereof is shown) connected to a speed reducer (drive device) not shown at a predetermined height position. Is.

The tubular connecting member 27 has a female spline portion (female joint element) 29 therein, and a compression coil spring 31 (and / or an elastic rubber material not shown) with respect to the assist stand 21. Bearing box 33 (bearing 3
It is rotatably supported by 5). A hydraulic cylinder 39 for retracting (and pushing out) the moving base 13 is attached to the lower portion of the assist stand 21 (which may be at another portion or place), and the tip of the cylinder rod 41 is detachable from the moving base. The connector 43 is attached.

At a predetermined internal position of the stationary base 11 on the speed reducer side (which may be another portion or place), a (pneumatic or hydraulic) cylinder 45 for enabling the stepwise movement of the moving base 13 and A primary stopper device 49 including a stopper member 47 and the like is provided. By the way, between a stand (not shown) on the worker side and a stand 15 on the reducer side, a steel roll shaft (shaft member) on which a roll (tool) 51 is mounted so as to bridge them. 53 is arranged, and the roll shaft 53 is rotatably supported by the bearing boxes 55 of both stands 15.

As can be understood from FIG. 2 which shows the roll shaft 53 as a single body, one end side (the speed reducer side) of the roll shaft 53 is fitted to the female spline portion 29 of the connecting member 27 described above. Male spline part (male joint element) 61
And a stepped small-diameter portion 63 on the tip end side thereof is made of steel (or a high-strength resin) that is integrally rotatable with the stepped small-diameter portion 63 via a key 65 and is slidable in the axial direction. The leading member 67 is attached.

The leading member 67 is biased outward by a compression coil spring 69 and is restrained by a retaining ring 71 so as not to jump out, and the female spline portion 29 of the connecting member 27 (and the roll shaft 53). Male spline part 6
It has a regular polygonal cross section with an angular position and dimensions corresponding to 1). That is, the male spline portion 61 and the female spline portion 2
The leading member 67 is configured to be insertable into the female spline portion 29 only when the phase of the leading member 67 and 9 is the same, and the leading member 67 is insertable into or inserted into the female spline portion 29. In this case, the male spline portion 61 and the female spline portion 29 can be smoothly fitted to each other by further pushing the roll shaft 53 by using the leading member 67 as a guide.

In order to facilitate the insertion (withdrawal) of the leading member 67 with respect to the female spline portion 29,
Each surface of the outer periphery of the leading member 67 is formed so as to present a smooth curved surface (or a sloped surface (not shown)) in the axial front-rear direction. In addition, in the present embodiment, since the spline (female spline portion 29 and male spline portion 61) having eight teeth (key portions) parallel to the axial direction is assumed, the leading member 67 has a regular octagonal cross section. Is configured to have. However, since the spline can have a different number of teeth, the axial sectional shape of the leading member 67 is not limited to the illustrated regular octagon, and the number of the leading member 67 is different from the number of teeth of the spline. It can also be configured to have a regular polygonal axial sectional shape. Further, both spline portions 29 and 61 are chamfered at their opposing tip portions for smooth engagement and connection.

The operation of the present embodiment having the above-mentioned structure will be briefly described below mainly with reference to FIGS. In order to make the drawings easy to understand, the key portions and the key groove portions of the spline portions 29 and 61, the key 65 of the stepped small diameter portion 63, and the like are partially omitted from the drawings. Further, only the process of forming one spline joint will be described, but it goes without saying that the other spline joints can be similarly formed.

First, on the immovable base 11, a newly prepared moving base 13 (having a stand on which rolls for producing the next electric resistance welded steel pipe are mounted) is used, for example, using a crane (not shown). Then, the movable base 13 is tentatively placed, and then the moving base 13 is translationally drawn into the speed reducer side by the hydraulic cylinder 39. FIG. 3 shows the roll shaft 5 at the time of this retraction.
3 (leading member 67) and connecting member 27 (female spline portion 2)
9) and 9) are not in contact with each other.

The moving base 13 has a primary stopper device 49.
The stopper member 47 comes into contact with and engages with the stopper member 47 to stop. At this time, it is rare that the male spline portion 61 (leading member 67) of the roll shaft 53 and the female spline portion 29 of the connecting member 27 are in phase with each other, and as shown in FIG. The leading member 67 abuts on the female spline portion 29 and is relatively pushed back axially rearward against the spring force of the compression coil spring 69. That is, the leading member 6
7 is not yet fitted in the female spline portion 29.

Next, for example, by the operator manually (or using a tool) rotating the roll shaft 53 by a predetermined angle,
The leading member 67 (male spline portion 61) and the female spline portion 29 are in phase with each other, and at that moment, the energy of the compression coil spring 69 stored in the leading member 67 causes the leading member 67 to rapidly slide toward the tip side. Then, it snaps into the female spline portion 29 of the connecting member 27. FIG. 5 shows a state in which the leading portion 67 is fitted into the female spline portion 29, and FIG. 7 shows the leading member 67 in the state of FIG.
It is sectional drawing seen from the arrow direction along the VII line.

Finally, the stopper member 47 of the primary stopper device 49 is retracted, and the moving base 13 is further retracted to the speed reducer side by a predetermined dimension by the hydraulic cylinder 39. At this time, the guide member 67 fitted into the female spline portion 29 of the connecting member 27 serves as a guide, and the male spline portion 61 of the roll shaft 53 smoothly fits into the female spline portion 29 of the connecting member 27 to form a spline. The bond is finally formed. FIG. 6 shows the final stage of this binding.

As described above, in the present embodiment, it becomes possible to replace the stand (bed replacement) with a change in the pipe making size, which has been spending a lot of time in the past, in an extremely short time (operation). At the same time, the spline connection of the roll shaft can be performed smoothly, reliably, and quickly, and damage to the roll shaft can be significantly reduced or eliminated.

Further, since the leading member 67 of the roll shaft 53 is biased by the spring 69, it is preferable that the impact at the time of contact with the connecting member 27 (female spline portion 61) can be alleviated. Further, even if the leading member 67 is damaged, it is only necessary to replace (easily replace) the relatively inexpensive leading member due to the structure that is formed separately from the roll shaft main body and assembled, and the roll shaft is Since it has few damages, it can be reused as it is, which is extremely rational and economical.

The roll shaft 5 is used for the phase adjustment.
Instead of turning 3, the reduction gear (not shown) is driven, and thus the connecting member 2 is connected via the universal joint 23.
7 may be rotated. In this embodiment, the roll shaft 53 is attached to the male spline portion 61 and the connecting member 27.
Although the female spline portion 29 is provided in the above, the female spline portion may be provided in the roll shaft and the male spline portion may be provided in the connecting member (not shown).

Further, in this embodiment, the male spline portion 61 and the female spline portion 29 are provided on the premise of spline connection, but instead of this, for example, although not shown,
A rod-shaped portion having a male regular polygonal (eg, regular quadrilateral, hexagonal, octagonal) cross section is provided on the roll shaft, and the rod-shaped portion can be fitted to the connecting member (having a female regular polygonal cross section). ) By providing corresponding holes, or vice versa,
It is possible to obtain the same operation and effect as in the present embodiment.

[0026]

As described above, according to the present invention, it is possible to obtain a rational and economical transmission coupling device and a shaft member which can effectively avoid the disadvantages of the transmission coupling means including splines and the like. it can.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of a bed exchange type electric resistance welded steel pipe manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of a roll shaft.

FIG. 3 is a cross-sectional view of a main portion of a female spline portion of a connecting member and a leading member of a roll shaft positioned away from the female spline portion.

FIG. 4 is a cross-sectional view of a main portion of the female spline portion of the connecting member and the leading member of the roll shaft in a state in which the female spline portion is in contact with the female spline portion and is pushed back toward the axial rear side.

FIG. 5 is a cross-sectional view of a main portion of a female spline portion of a connecting member and a leading member of a roll shaft fitted into the female spline portion.

FIG. 6 is a cross-sectional view of essential parts of a female spline portion of a connecting member and a male spline portion of a roll shaft finally fitted to the female spline portion.

7 is a cross-sectional view of the leading member and the female spline portion of FIG. 5, taken along the line VII-VII and seen from the direction of the arrow.

[Explanation of symbols]

 11 ... Immovable base 13 ... Moving base 15 ... Stand 21 ... Assist stand 23 ... Universal joint 27 ... Connecting member 29 ... Female spline part 31 ... Compression coil spring 33 ... Bearing box 35 ... Bearing 39 ... Hydraulic cylinder 41 ... Cylinder rod 43 ... Connector 45 ... Cylinder 47 ... Stopper member 49 ... Primary stopper device 51 ... Roll 53 ... Roll shaft 55 ... Bearing box 61 ... Male spline part 63 ... Stepped small diameter part 65 ... Key 67 ... Leading member 69 ... Compression coil spring 71 ... Stop ring

Claims (2)

(57) [Claims] 1. A transmission coupling device which may be configured by a male-female fit between a male joint element of one member and a corresponding female joint element of the other member, wherein a male joint element of one member. To the distal end side, is conductively fitted in a female joint element that is integrally rotatably supported and movably in the male and female fitting direction and is normally biased to the distal side by the biasing means. Is provided with a guide member that is capable of mating into the female joint element by the guiding of the leading member during conductive engagement of the leading member with the female joint element. Characteristic conductive coupling device. 2. A shaft member for use in a conductive coupling device, comprising a male joint element, which may be constituted by a male-female fitting of said male joint element and a corresponding female joint element of the other member. A female joint, which is supported on the tip side of the male joint element of the shaft member so as to be integrally rotatable and movable in the male and female fitting direction, and is normally biased to the tip side by the biasing means. A leading member is provided which is conductively fittable within the element, and upon conducting fitting of the leading member to the female joint element, the male joint element is guided by the leading member into the female joint element. A shaft member, which can be fitted into a male and female.