JPS6257078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller used in an electromagnetic stirring device of a continuous casting machine, etc., in which two inclined surfaces of a recess formed at the shaft end of the roller and a rotating conductor fitted in the recess are provided. The present invention relates to a roller current-carrying connection device in which a sufficient electrical connection surface is obtained by joining two joint surfaces of a convex portion, and rotary mechanical force can be reliably transmitted to a rotating conductor.

Generally, continuous casting machines for metals such as steel use an electromagnetic stirring device that rotates and stirs the molten steel by applying electromagnetic force to the molten steel in the unsolidified molten part of the continuously cast slab. This electromagnetic stirring device consists of, for example, two annular DC coils and a pair of rollers,
These are connected in series, and a direct current is passed through the series circuit. Therefore, the molten steel in the unsolidified molten part of the slab passing through the center of each coil and between both rollers is affected by the electromagnetic force caused by the magnetic flux generated in the molten steel by the two DC coils and the current flowing between the pair of rollers. It is rotated and stirred by.

By the way, both of the rollers mentioned above need to be electrically connected, but in the conventional roller electrical connection device, electricity is applied directly from the surface of the roller using multiple brushes, etc., which makes the device large. At the same time, it has the drawback of increasing the number of parts and making it expensive.

This invention has been made with the above points in mind, and will now be described in detail with reference to drawings showing one embodiment thereof.

In the drawing, 1 is a conductive roller, 2 is an auxiliary conductor integrally provided at the center of the shaft end of the roller 1, and a screw hole 2' is formed in the center of the auxiliary conductor 2. 3 is a groove-shaped recess formed on the end surface of the auxiliary conductor 2 and passes through the axial center of the roller 1; 4 is the recess 3;
These are two inclined surfaces formed on two opposing surfaces of the roller 1, and both inclined surfaces 4 are expanded in the axial end direction of the roller 1, that is, in the forward direction. A bearing 5 is provided on the outer periphery of the shaft end of the roller 1 and rotatably supports the roller 1. The bearing 5 is integrally provided with a housing that holds the roller 1. 6 has a bearing at the base 5
It is a conductive frame attached to the front end surface of the frame 6 via an annular insulating plate 7, and a collar-shaped attachment portion 6' at the base of the frame 6 has four through holes 8 for bolts formed at equal intervals. , four stud bolts 9, one end of which is inserted into the bearing 5 at equal intervals, are each inserted into the bolt through hole 8, and the other end of the bolt 9 is fitted with an insulating bushing 10, a bushing retainer 11, and a spring. A nut 13 is tightened through a washer 12,
Thereby, the frame 6 is fixed to the bearing 5.
Reference numeral 14 denotes a recessed part formed at the rear end of the frame 6 and having a substantially concave cross section in which a rotating conductor (to be described later) is disposed; 15 is a hexagonal hole (described later) which is formed at the axial center of the frame 6 and passes through the frame 6 in the front-rear direction. This is an insertion hole for a tightening jig (not shown) for the attached bolt, and the insertion hole 15
An entry portion 15' having a somewhat larger diameter is formed at the rear end to allow entry of the head of a hexagon socket head bolt. Reference numeral 16 denotes four storage parts formed at equal intervals on the circumference around the insertion hole 15 in the frame 6, and the rear end of each storage part 16 communicates with the recessed part 14. At the same time, the front end portion of each storage portion 16 is opened to the front end surface of the frame 6 through a through hole 17, respectively.

18 is a substantially disk-shaped rotating conductor that is rotatably arranged in the recessed part 14, 19 is a bank-shaped convex part formed on the back surface of the rotary conductor 18 and fits into the concave part 3 of the roller 1, and 20 is a convex part. 21 is a contact surface of a brush formed at the front end of the rotating conductor 18 and inclined in an umbrella shape, which will be described later. 22 is a contact surface formed at the center of the rotating conductor 18. formed 6
This is a through hole for a square-hole bolt, and a holding portion 22' for holding the head of the bolt is formed at the front of the through hole 22. 23 is a bolt with a hexagonal socket for fixing the rotating conductor 18 to the auxiliary conductor 2 by fitting the convex part 19 into the concave part 3, and by tightening the bolt 23, both inclined surfaces 4
and both joint surfaces 20 are closely joined, and the rotating conductor 18
is integrally attached to roller 1. Reference numeral 24 designates an annular contact plate which is attached to the frame 6 on the outer periphery of the recessed part 14 with four bolts 25 and has an annular resin 26 attached to the inner periphery. A part of the auxiliary conductor 2 is fitted into the resin 26 to guide the frame 6 and the roller 1.

27 is a roller 1 in each storage section 16 in the frame 6.
A brush 28 is provided movably in a direction parallel to the rotation axis of the brush 27, and is formed at the rear end of the brush 27.
The rear end of the brush 27 is in contact with the rotating conductor 18, and the sliding surface 28 is in sliding contact with the contact surface 21. 29 is a contact pressure spring that is installed between the front end surface of the brush 27 in each storage section 16 and the front end of the storage section 16 and biases the brush 27 rearward;
Due to the bias of the spring 29, the sliding surface 28 of the brush 27 is pressed against the contact surface 21 of the rotating conductor 18, and a good electrical connection is obtained. 30 has a brush 27 at one end
The flexible conductive wire 31 is connected to the front end of each housing section 16 and is connected to the other end of the flexible conductive wire 30 by caulking. 31' is brought into contact with the frame 6 at the front end of the storage part 16, and the fixing screw part 31'' extending forward is guided out of the frame 6 through the through hole 17, and the flat washer 32 and the spring washer It is fixed to the frame 6 by tightening nuts 34 through 33. 35 is a cylindrical protective cover with a lid mounted on the front end of the frame 6 so as to cover each nut 34, and there are two It is fixed to the frame 6 with bolts 36 .

37 has a flat washer 38 on the bottom surface of the frame 6 on one side;
An L-shaped connecting conductor 41 is a current-carrying conductor fixed by a bolt 40 via a spring washer 39, and an end of the conductor 41 and the other end of the connecting conductor 37 are connected to a bolt 42, flat washers 43, 44, They are connected by a spring washer 45 and a nut 46. Note that 47 is an O interposed between the frame 6 and the protective cover 35.
It's a ring.

Next, the operation of the above embodiment will be explained.

First, to explain the assembly order, the clasp 31 and the brush 27, which are integrally connected by a press-contact spring 29 and a flexible conductor 30, are stored in each housing part 16 of the frame 6, and the clasp 31 is attached to the frame 6 by a nut 34. Fixed to. Thereafter, the rotating conductor 18 and the hexagonal bolts 23 inserted through the rotating conductor 18 are placed in the recessed portion 14 of the frame 6, and the plate 24 is fixed to the frame 6 with the bolts 25. At this time, the rotating conductor 18 is moved by the brush 27 by the contact pressure spring 29.
Due to the pressure, the rotating conductor 18 tries to come out from the frame 6, but the outer peripheral edge of the rotating conductor 18 comes into contact with the contact plate 24 and is suppressed, so that it is held in the recessed part 14. Then, the stud bolts 9 are passed through the front end surface of the bearing 5, and the insulating plate 7 is attached.
the convex portion 19 of the rotating conductor 18 into the auxiliary conductor 2.
The frame 6 is fitted into the recess 3 of the roller 1, and the frame 6 is brought into contact with the shaft end of the roller 1, and the frame 6 is fixed to the bearing 5 by tightening nuts 13 to each stud bolt 9. At this time, the tip of the hexagon socket head bolt 23 is located at the open end of the screw hole 2' of the auxiliary conductor 2, and the head of the bolt 23 is located at the entry portion 15' of the insertion hole 15.
Then, the tightening jig is passed through the insertion hole 15, and the hexagonal socket bolt 23 is screwed into the screw hole 2' by a rotational tightening operation from outside the frame 6.
0 to both inclined surfaces 4 respectively to form a rotating conductor 18.
to the auxiliary conductor 2. Furthermore, a cover 35 is mounted on the front end of the frame 6 and fixed with bolts 36, thereby completing the assembly of the current-carrying connection device.

When the roller 1 rotates, the auxiliary conductor 2 integrated with the roller 1 is rotated, and the hexagonal socket bolt 23
As a result, the rotating conductor 18 fixed to the auxiliary conductor 2 is also rotated, and the sliding surface 28 of the brush 27 comes into sliding contact with the contact surface 21 of the rotating conductor 18.

In this rotating state, the frame 6 and roller 1 are
Power receiving part 31', stopper 31, flexible conductor 30, brush 27, sliding surface 28, contact surface 21, rotating conductor 18,
A current is connected through the joint surface 20, the inclined surface 4, and the auxiliary conductor 2, and when a current is applied to the current-carrying conductor 41, the current is applied to the roller 1 through the connection conductor 37 and the frame 6.

Further, when removing the frame 6 from the roller 1 for maintenance inspection or the like, first loosen the two bolts 36, remove the cover 35, insert a jig into the insertion hole 15, and loosen the hexagonal socket bolt 23. after that,
Loosen and remove the nuts 13 of each stud bolt 9, and in this state, remove the entire frame 6. At this time, the rotating conductor 18 is connected to the auxiliary conductor 2 on both sides 4 and 2.
0 may still be firmly joined, but it can be easily removed by hitting the outer peripheral edge of the rotating conductor 18 with the contact plate 24.

Therefore, according to the embodiment, the rotating conductor 1
By fitting the convex portion 19 of 8 into the concave portion 3 of the auxiliary conductor 2 and joining both joint surfaces 20 to both inclined surfaces 4, respectively, and tightening the hexagon socket head bolt 23, the rotating conductor 18 is fixed to the roller. Auxiliary conductor 2 at the shaft end of 1
As mentioned above, since the rotating conductor 18 is mechanically tightened, there is no play, and the rotating mechanical force of the roller 1 can be reliably fixed to the rotating conductor 18.
can be conveyed to.

In addition, since the rotating conductor 18 and the auxiliary conductor 2 can be joined at both joint surfaces 20 and both inclined surfaces 4, it is possible to obtain a very large contact force and a relatively large joint area due to the wedge effect. , a sufficient electrical connection surface can be obtained.
Further, the brush 27 in contact with the contact surface 21 of the rotating conductor 18 is biased by the contact pressure spring 29, so that the rotating conductor 1
Moreover, since the sliding surface 28 of the brush 27 is formed to be equal to the slope of the contact surface 21, the brush 27 can be brought into pressure contact with the rotating conductor 18 by rotation of the rotating conductor 18.
The flexible conductor 30 is not rotated, and there is no twisting of the flexible conductor 30, and stable contact can be maintained at all times. It does not require any special mechanism and can be done at low cost.

Furthermore, since the current-carrying surface for the roller 1 can be provided at the end of the shaft of the roller, the device can be made smaller and lighter, and the number of parts can be reduced and the cost can be reduced. In addition, the frame 6 can be removed from the roller 1 by simply loosening the hexagonal socket head cap bolt 23 and removing the nut 13 of the stud bolt 9, making it extremely easy to attach and detach.Moreover, it is maintenance-free except for wear and tear on the brush 27. Therefore, maintenance and inspection can be easily performed.

As described above, according to the roller current-carrying connection device of the present invention, a groove-shaped recess is formed on the axial end surface of the conductive roller, and the two opposing surfaces of the recess are expanded in the direction of the axial end of the roller. A bank-like protrusion that fits into the recess is formed on the back surface of the rotating conductor whose front surface is in sliding contact with the brush, and a joint that joins the inclined surface is formed on two sides of the protrusion. By forming two surfaces, fitting the convex part into the concave part, joining both joint surfaces to both inclined surfaces, and fixing the rotating conductor to the shaft end of the roller with bolts,
Since the rotating conductor can be mechanically tightened and fixed to the shaft end of the roller, rotational mechanical force can be transmitted reliably without any play.Furthermore, by joining both joint surfaces and both inclined surfaces, there is a sufficient electrical connection surface. can be obtained, and the roller can have a good electrical connection.

[Brief explanation of the drawing]

The drawings show one embodiment of the current-carrying connection device for a roller according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view taken along line A-A' in Fig. 1, and Fig. 3 is a rear view of a rotating conductor. be. 1...Roller, 3...Recess, 4...Slope, 1
8...Rotating conductor, 19...Convex portion, 20...Joint surface, 23...Hexagon socket head bolt, 27...Brush.

Claims (1)

[Claims] 1 A groove-shaped recess is formed on the axial end surface of the conductive roller, and sloped surfaces that expand toward the axial end of the roller are formed on two opposing surfaces of the recess, so that the front surface slides on the brush. A bank-like protrusion that fits into the recess is formed on the back surface of the rotating conductor to be contacted, and a joint surface that is joined to the inclined surface is formed on two sides of the protrusion, and the protrusion is A current-carrying connection device for a roller, characterized in that the rotary conductor is fitted into the recess to join the two joining surfaces to the two inclined surfaces, and the rotating conductor is fixed to the shaft end of the roller with a bolt.