JPH06196236A - Electric joint device for universal head - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a coupler-type electric coupling device installed particularly on the outer periphery of a slewing bearing portion. In a universal head that supports a universal head 10 on a swivel shaft 5 in a spindle head 3 to perform swivel indexing between a vertical posture and a horizontal posture, an outer peripheral surface of a head support portion 4 on the spindle head side when swivel indexing is completed. The electric coupling member 21A provided on the universal head is rotated and pressed to the electric coupling member 22A provided on the outer peripheral surface of the mounting portion 11 of the universal head, and the electric coupling device 20 of the universal head having a perfect electrical connection is provided. It is a thing.

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 The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to solve the problems. In particular, the present invention provides a coupler type electric coupling device installed on the outer periphery of a slewing bearing portion. With the goal.

[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 joint members are provided on the head support portion side on the outer peripheral surface of the head mounting portion at symmetrical positions with the rotation center line interposed therebetween, and the attachment portion side has one rotation center line on one side. A configuration is provided in which a set of electric joint members is provided, and the electric joint member of the head supporting portion is pivoted and press-bonded to the electric joint member of the mounting portion when the universal head completes pivotal indexing in a vertical posture or a horizontal posture. This is an electrical joint device for a universal head. Thereby, for example, when the swivel indexing is completed, the electric joint member provided in the head support portion on the spindle head side and the electric joint member provided in the mounting portion of the universal head are pressed and joined by the swiveling motion of the universal head, and the 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
FIG. 3 is a partially cutaway sectional view of the universal head of the present invention. FIG. 2 is a plan view showing a coupler-type electric coupling device installed on the outer periphery of the slewing bearing portion. FIG. 3 is a front view showing the electric joint member. FIG. 4 is a plan view showing the electric coupling device of the present invention.

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 circumference of the head supporting portion 4 on the circumferential surface facing the outer peripheral surface of the universal head 10 and the outer peripheral surface of the mounting portion 11 of the universal head 10, two sets of electric coupling members 21 are arranged in symmetrical positions with respect to the rotation center line L.
A, 21B are provided, and one set of electric coupling members 22A is provided on one side across the rotation center line L on the mounting portion 11 side. Each contact surface 23, 24, 25 of the member is provided with a plurality of electrical contacts a ..., B ..., C ..., The cable K1 is connected to the power source side, and the cable K2 on the load side is the universal head. It is connected to a spindle drive motor (not shown) in the unit 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 to complete the swivel indexing in the vertical posture or the horizontal posture, 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 spring type pressing member 30. The structure for pivoting and pressing and joining is shown in FIG. That is, the electric coupling member 22A is fixedly attached to the outer peripheral portion of the mounting portion 11 by the connecting tool 27, the plurality of electrode pins 30 are provided in the circumferential direction, and the exposed ends are the electric contacts c.
.. is configured. Further, each electrode pin 30 is connected to each wire at the tip of the cable K2. On the other hand, the electric coupling members 21A and 21B are fixedly provided on the outer peripheral surface of the head supporting portion 4. A plurality of electrode pins 31 ... Are pierced through the support cylinder 26 in the electric coupling members 21A and 21B, and the exposed tips form the electric contacts a. The electrode pins 31 ··· function as pistons to which a protruding output is applied by the built-in springs 32 · ·,
The lines at the end of the cable K1 are connected to. When the universal head 10 is clamped, the electric contact a as shown in 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 coupling member 22A on the side of the mounting portion 11 faces the electric coupling member 21A on one side, the contacts a ...
Are compressed and joined by this repulsive force. On the other hand, when the universal head 10 rotates 180 °, the electric coupling member 22 is rotated.
A faces the electric coupling member 21B on one side like 22A '. Here as well, the electrical contacts b ..., C ... of the electrical coupling member 22A 'compress the spring 32 and join by this repulsive force. Therefore, one of the universal heads 10
Even when turning by 80 °, stable electricity can be supplied without generating unnecessary twist between the cables K1 and K2, and its life can be maintained for a long period of time.

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.

[0010]

As described above, according to the present invention, the electric joint member provided in the head support portion on the spindle head side and the electric joint member provided in the mounting portion of the universal head are pressed and joined by the turning movement of the universal head when the turning indexing is completed. Therefore, there are many effects such as complete electrical connection, stable electric power supply without generating unnecessary twist between cables, and long-term maintenance of the electric power.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a coupler-type electric coupling device installed on the outer periphery of a slewing bearing portion.

FIG. 3 is a front view showing an electric joint member.

FIG. 4 is a plan view showing an 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 30, 31 Electrode pin 32 Spring

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[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]

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 an outer peripheral surface between a head support portion of the spindle head and a mounting portion of the universal head. The upper head supporting portion side is provided with two sets of electric coupling members at symmetrical positions with respect to the rotation center line, and the mounting portion side is provided with one set of electrical coupling members with one side across the rotation center line. The universal head is configured to swivel and press-join the electric coupling member of the head support portion to the electric coupling member of the mounting portion when the swivel indexing of the universal head in the vertical posture or the horizontal posture is completed. Electric coupling device.