JPH081514Y2 - Uniaxial table with rotating table - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a table having a single drive axis used in industrial robots and measuring instruments.

-Prior art In this type of conventional device, the slide unit was a linear motion guide uniaxial table having a function of only moving relative to the rail, so that the movable member was simply moved linearly. .

Therefore, when the movable member is moved linearly and is rotated at a predetermined position such as an industrial robot or a measuring instrument, as disclosed in, for example, Japanese Patent Laid-Open No. 63-271191. , A rotary (θ) table device had to be attached to the upper surface of the slide unit.

・ Problems to be solved by the invention Due to such a configuration, when linear movement and rotational movement are applied to the moving member, not only the sectional height of the entire apparatus increases but also the weight of the moving unit as a whole. However, there is a problem in that the inertial force is increased due to the increase in the weight, the positioning accuracy is lowered, and the cumulative error is increased due to the large number of assembly of parts and the linear motion accuracy of the entire apparatus is lowered.

Also, the cost has increased due to the increase in the number of parts.

-Means for Solving Problems The present invention has the following configuration in order to solve these problems.

A wide rail, which is a long member having a wide width and has tracks formed on both side surfaces in the longitudinal direction, and a slide unit having a similar track formed at a position facing the track, are provided with a large number of rolling elements between the tracks. In a uniaxial table in which the slide unit is inserted and slidably attached, and the drive unit attached to the wide rail and the slide unit moves the slide unit forward and backward with respect to the wide rail, the slide unit has the wide portion in the lower surface recess. A main body formed by inserting rails, and an integral rotary table rotatably inserted from an upper portion of the main body. A stator is provided on the main body side so that the rotary table and the main body can be rotationally positioned.
A uniaxial table with a rotary table having a rotary drive mechanism in which a rotor is mounted on the rotary table side facing the stator.

-Operation According to the above configuration, the main body slides on the wide rail by the operation of the drive device, and the rotary table is rotationally positioned with respect to the main body by the operation of the rotary drive mechanism.

Example Next, a uniaxial table with a rotary table as an example of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the wide rail 1 is formed as a wide member having a substantially U-shaped cross section and formed with a track groove 1a as a track on both upper side shoulder side wall surfaces in the longitudinal direction. The ball screw shaft 12 is attached to the groove portion 1b while being held at both longitudinal end portions thereof.

This ball screw shaft 12 is connected to a nut 11 attached to the lower surface of the slide unit 20,
When 12 is rotated, the slide unit 20 can move forward and backward in the axial direction, that is, along the wide rail 1. A stepping motor is attached to one end of the ball screw shaft 12.
With 15 installed, the shaft can be rotated. The ball screw shaft 12, the nut 11, and the stepping motor 15 are collectively referred to as a drive device.

The slide unit 20 is formed in a substantially rectangular parallelepiped shape as a whole, and has a substantially rectangular parallelepiped main body 2 in which an infinite circulation path including ball raceways 2a (ball direction changing paths on both side plates 4) is formed on both sleeves. The main body 2 is rotatably mounted on the main body 2 and includes a rotary table 3 having a disk-shaped rotating portion. The track groove 2a as a track formed in the main body 2 faces the track groove 1a of the wide rail 1. Further, a recess 2e is formed on the lower surface side of the main body 2, and the wide rail 1 is fitted and inserted in this lower surface recess 2e.

The main body 2 carries the rotary table 3 and slides on the wide rail 1, and the rotary table 3 can smoothly rotate the disk-shaped portion with the center of the main body 2 as the rotation axis.

As is apparent from FIG. 2, the rotary table 3 has a shape in which a hollow cylindrical portion 3a is integrally fixed under a disk-shaped portion, and the cylindrical portion 3a is formed in a hole formed in the main body 2. It is inserted rotatably from the top. A threaded portion is formed on the end surface of the cylindrical portion 3a.

A rotary drive mechanism (motor) for mounting the rotary table 3 on the main body 2 and for rotationally positioning the rotary table 3
The holes for mounting the are formed vertically.

As a rotary drive mechanism for rotation, a rotor 7 is provided on the rotary table 3 side, and a stator 6 is provided on the main body 2 side facing the rotor 7.
Install. Ball bearings are provided on both sides of the rotary drive mechanism.
8, 8 are fitted between the cylindrical portion 3a of the rotary table 3 and the hole of the main body 2 and fixed by bearing adapter nuts 9, 9, and the rotary table 3 is rotatably attached to the main body 2. . Electric power is supplied to the rotary drive mechanism by energizing a coil (not shown) wound around the stator 6 from a drive source (not shown).

As is apparent from the above, in the uniaxial table with the rotary table, the rotary table 3 is rotatably fitted from the upper portion of the main body 2 to the main body 2 that moves forward and backward along the wide rail 1 to be integrated. It has become. That is, the main body 2 that constitutes the linear motion guide mechanism together with the wide rail 1
Is utilized as a base portion that should be included in a bearing mechanism that rotatably supports the rotary table 3. That is,
A single member called the main body 2 serves as a bearing in addition to the original sliding action, and is shared so as to perform two actions, thereby integrating the rotating portion and the sliding portion. .

The infinite circulation path of the balls 5 formed in the lower sleeves of the slide unit 20 is formed in the raceway groove 2a and the return hole 2b formed in the main body 2 and the side plates 4 fitted to both ends of the main body. It is constituted by the turning path 4a. Raceway groove
2a and the return hole 2b are connected by the direction change path 4a.

In addition, in FIG. 1 and FIG. 2, reference numerals 10, 13 and
The members indicated by 14 are a nut housing, a supporter, and a stopper plate, respectively.

The rotary drive mechanism of the rotary table and the rotary table holding technique shown in the present embodiment are merely examples.
It is also possible to use various known techniques other than this.

Similarly, the linear motion guide unit is not limited to the configuration of this embodiment.

-Effects The present invention has the following effects.

Since the rotating part and the sliding part are integrated, there are few accumulated errors due to assembly of parts, and high linear motion accuracy and rotation accuracy can be obtained.

 Lightweight and compact.

 It can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a uniaxial table with a rotary table as an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the uniaxial table with a rotary table shown in FIG. 1: Wide rail, 1a: Raceway groove 1b: Recessed groove, 2: Main body 2a: Raceway groove, 2b: Return hole 3: Turning table, 4: Side plate 5: Ball (rolling element), 6: Stator 7: Rotor, 8 : Ball bearing 9: Adapter nut, 10: Nut housing 11: Nut, 12: Ball screw shaft 13: Supporter, 14: Stop plate 20: Slide unit

Claims (1)

[Scope of utility model registration request] 1. A wide rail, which is a long member having a wide width and has tracks formed on both side surfaces in the longitudinal direction, and a slide unit having a similar track formed at a position facing the track between the tracks. In a uniaxial table in which a large number of rolling elements are inserted and slidably attached, and a slide unit is moved forward and backward with respect to the wide rail by a driving device attached to the wide rail and the slide unit, the slide unit includes: It is composed of a main body in which the wide rail is inserted in the lower surface concave portion and an integral rotary table which is rotatably inserted from the upper part of the main body, and the main body side so that the rotary table and the main body can be rotationally positioned. And a stator, and a rotary drive mechanism in which a rotor is attached to the rotary table side facing the stator. Bull with uniaxial table.