JPH06196235A - Electric joint device for universal head - Google Patents

Abstract

PURPOSE:To provide a coupler type electric joint device to be installed on a rotary bearing section in particular. CONSTITUTION:A universal head 10 is supported on a rotary shaft 5 in a main spindle head 3, and rotary indexing is performed between the vertical posture and the horizontal posture. An electric joint member 21A provided on a head support section 4 on the main spindle head 3 side is pressed and connected to an electric joint member 22A provided on the fitting section of the universal head 10 with a fluid type pressing member at the time of clamping when the rotary indexing is completed. The electric joint device 20 of the universal head 10 having perfect electric connection is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal head electrical coupling device, and more particularly to a coupler type electrical coupling device installed in a slewing bearing portion.

[0002]

2. Description of the Related Art A universal head found in a conventional five-sided machine has a structure in which a swivel bearing portion is tilted at 45 degrees to swivel and index a main axis direction into a horizontal posture and a vertical posture. As a typical publicly known example thereof, Japanese Patent Laid-Open No. 2-76
No. 603 is proposed. In this embodiment, the method for feeding power to the spindle drive motor 25 provided in the universal head 19 by means of a cable is the universal head 1
An electric wire 29 is connected to the main shaft drive motor 25 in the universal head 19 through the inside of the cylinder of the engaging shaft 12 that serves as the slewing bearing portion 9. According to the above means, the electric wire 29 is passed through the inside of the cylinder of the engaging shaft 12 and is connected to the main shaft drive motor 25 in the universal head 19. Although the cable twist is small, it is still the same as the cable twist. Rather, the electric wire 29 is connected to the main shaft drive motor 25 in the universal head 19 by passing the electric wire 29 through the cylinder of the engaging shaft 12.
If a wire breakage occurs, it will take time and effort to replace this wire, and the maintainability at the time of failure will be poor.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the prior art, and it is an object of the present invention to provide a coupler type electric coupling device installed in a slewing bearing portion. And

[0004]

SUMMARY OF THE INVENTION The present invention is a universal head for supporting a universal head on a swivel shaft in a spindle head to swivel and index between a vertical posture and a horizontal posture. Two sets of electric coupling members are provided on the side of the head support portion on the circumference facing the mounting portion of the head in symmetrical positions with the rotation center line interposed, and on the mounting portion side, one side with the rotation center line interposed. A pair of electric coupling members, and the universal head presses the electric coupling member of the head supporting portion against the electric coupling member of the mounting portion by a fluid pressure pressing member when the universal head is clamped in a vertical posture or a horizontal posture to complete swivel indexing. This is an electric coupling device for a universal head, which is characterized in that it is configured to be joined. Thereby, for example, when the turning index is clamped, the electric joint member provided in the head support portion on the spindle head side is pressed and joined to the electric joint member provided in the mounting portion of the universal head by the fluid type pressing member, so that an electrical connection is made. It is a perfect wall, and stable electricity can be supplied without generating unnecessary twist between cables, and its life can be maintained for a long time.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below. Figure 1
2 is a partially cutaway sectional view of a universal head of the present invention, FIG. 2 is a perspective view showing a coupler type electric coupling device installed in a slewing bearing portion, and FIG. 3 shows an electric coupling device at the time of slewing indexing. FIG. 4 is a cross-sectional view, FIG. 4 is a cross-sectional view showing the electric coupling device at the time of clamping, and FIG. 5 is a time chart diagram showing the operation of the electric coupling device.

FIG. 1 shows a universal head 10.
Is a column of the machine body, and a spindle head (headstock) 3 that moves up and down is engaged with the sliding surface 2. The head support portion 4 of the spindle head (headstock) 3 serves as bearings 6 and 7 that can swivel and slide with respect to the swivel shaft 5, a meshing ring type clamp mechanism 8 that restrains swivel, and a drive source for this. It includes a clamp cylinder C, a motor M, and a swing drive mechanism 9 for the swing shaft 5 including the small gear 12 and the transmission gear 13. The universal head 10 is attached to the tip flange 5a of the swivel shaft 5.
The mounting portion 11 is attached and the clamp mechanism 8 releases when the swivel shaft 5 is moved a small amount in the distal direction by the clamp cylinder C. At the time of this release, the support shaft 5 having the rotation center line L of 45 ° as the axis center causes the swivel drive mechanism 9 to swivel and index the universal head 10 into a vertical posture indicated by a solid line and a horizontal posture indicated by a chain double-dashed line.

Next, the details of the coupler type electric coupling device 20 of the present invention will be described with reference to FIGS. In the coupler-type electric coupling device 20, the head support portion 4 of the spindle head 3 is provided.
On the side of the head supporting portion 4 on the circumference of the surface facing the mounting portion 11 of the universal head 10, two sets of electric coupling members 21A and 21B are provided at symmetrical positions with respect to the rotation center line L. One on either side of the center of rotation L on one side
It is provided with a set of electric coupling members 22A. Each of the contact surfaces 23, 24, 25 of the member has a plurality of electrical contacts a ...
.., c .., the cable K1 is connected to the power source side, and the cable K2 on the load side is connected to the spindle drive motor (not shown) in the universal head 10. The two sets of electric coupling members 21A and 21B are connected by branching the cable K1 into two.

When the universal head 10 is clamped in the vertical posture or in the horizontal posture to complete the swivel indexing, the electric coupling members 21A and 21B of the head supporting portion 4 are connected to the electric coupling member 22A of the mounting portion 11 by the fluid pressing member 30. The structure for pressing and joining is shown in FIGS. That is, the electric joint member 22A is fixedly mounted on the mounting portion 11 by the connector 27, and the electric joint members 21A and 21B are slidably fitted in the cylinder tube 26 fitted in the cavity 4a of the head support portion 4. . The electric coupling members 21A and 21B function as pistons in the cylinder cylinder 26, and the cable K1 is protected inside the cylinder cylinder 26 in a confidential guide tube 27 '. Further, a compressed air source E is required as a drive source for advancing and retracting the electric coupling members 21A and 21B, and the supply pipes 28 and 29 are connected to the cylinder tube 26 via the switching valve V.
., C ... of FIG. 3 separated by the switching action of the switching valve V and the electrical contact a of FIG.
.., c.
Move A and 21B. Then, as shown in FIG. 2, the two sets of electric coupling members 21 are placed in symmetrical positions with respect to the rotation center line L.
A and 21B are provided, and when the electric joint member 22A on the side of the mounting portion 11 faces the electric joint member 21A on one side, when the electric joint member 21A is moved forward, the electric contact a.
・ 、 C ・ ・ join. On the other hand, the universal head 10
When the electric joint member 22A is rotated by 180 °,
To face the electric coupling member 21B on one side as described above. Here again, when the electric joint member 21B is moved forward, the electric contacts b ..., C ... Join. Therefore, even when the universal head 10 is rotated by 180 °, stable electricity can be supplied without generating unnecessary twist between the cables K1 and K2.
Its life can be maintained for a long time.

Finally, referring to FIG. 5, each member 8, 10, 21 is
The time chart of A, 21B, 22A will be described. By the "unclamp command (a)" from an electric control unit (not shown), the clamp mechanism 8 is unclamped and the electric coupling member 21A is also separated from 22A. After that, the "turning start command (b)" starts the 180 ° turning of the universal head 10 to the vertical posture, and when the end is sensed, the "clamp command (a ')" is issued by the "end command (b')". Then, the clamp mechanism 8 is clamped and the electric joint member 21A or 21B is also joined to 22A. With this, the mechanical clamping and electrical connection of the universal head 10 in the vertical posture is completed, and the workpiece machining is performed with the spindle in the vertical posture. When the universal head 10 is changed from the vertical posture to the horizontal posture, the clamp mechanism 8 and the electric joint members 21A, 21B and 22A also operate in the same procedure as described above.

It is needless to say that the present invention is not limited to the above-mentioned one embodiment, and design changes can be made within the scope of the invention.

[0011]

As described above, according to the present invention, the electric joint member provided in the head support portion on the spindle head side is pressed and joined to the electric joint member provided in the mounting portion of the universal head by the fluid type pressing member at the time of clamping after the completion of the turning indexing. Therefore, there are many effects such that the electrical connection is complete, stable electricity can be supplied without generating unnecessary twist between the cables, and the life can be maintained for a long time.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a universal head of the present invention.

FIG. 2 is a perspective view showing a coupler-type electric coupling device of the present invention installed in a slewing bearing portion.

FIG. 3 is a cross-sectional view showing the electric coupling device of the present invention during swivel indexing.

FIG. 4 is a sectional view showing the electric coupling device of the present invention during clamping.

FIG. 5 is a time chart showing the operation of the electric coupling device of the present invention.

[Explanation of symbols]

 3 spindle head (headstock) 4 head support 5 turning axis C clamp cylinder 8 clamp mechanism 10 universal head 11 mounting part 20 electric joint device 21A, 21B, 22A electric joint member L rotation center line a, b, c electric contact K2 , K1 cable 26 Cylinder cylinder E Compressed air source V Switching valve

[Procedure amendment]

[Submission date] October 13, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

Claims (1)

[Claims] 1. A universal head for supporting a universal head on a swivel shaft in a spindle head to swivel and index between a vertical posture and a horizontal posture, and a facing circle between a head support portion of the spindle head and a mounting portion of the universal head. Two sets of electric joint members are provided on the side of the head supporting portion on the circumference at symmetrical positions with respect to the rotation center line, and one set of electric coupling members on one side with the rotation center line on the mounting portion side. The universal head is configured to press-join the electric joint member of the head support portion to the electric joint member of the mounting portion by a fluid pressure pressing member when the universal head is clamped in a vertical posture or a horizontal posture to complete swivel indexing. And universal head electrical coupling device.