JPH08219151A - Guide device for rectilinear motion - Google Patents

Abstract

PURPOSE: To take the effective area of a table larger without deteriorating fastening strength. CONSTITUTION: A sliding base 1 is assembled on a locus rail 2 through multiple ball, and it is fixed to a table 3 by first and second bolts 4, 5 which are arranged apart for a prescribed clearance in a width direction of the locus rail 2. A first bolt tap hole 6 is formed on the table fixing surface of the sliding base 1, and a first bolt 4 is screwed and fixed around/to a fist bolt tap hole 6 penetrating a first bolt inserting hole 7 arranged on the table 3. A fixing flange 8 is arranged on one side of the sliding base 1 so as to position on the side of the locus rail 2, and a second bolt 5 is screwed and fixed around/to a second bolt tap hole 10 arranged on the sliding base 1 fixing surface of the table 3 penetrating the second bolt inserting hole 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for linear motion for guiding a table such as a working table, and more particularly to a fixing structure for a sliding base fastened to the table.

[0002]

2. Description of the Related Art A conventional linear motion guide device such as a machining table has a structure as shown in FIG. That is, the slide base 100 is the track rail 101.
Is mounted on the sliding table 100 with a large number of balls 102, and a table 103 is fixed to the upper surface of the sliding table 100. The slide base 100 and the table 103 are fastened together by first and second bolts 104 and 105 arranged at a predetermined distance in the width direction of the track rail 101.

Conventionally, the table fixing surface of the slide base 100 is provided with tap holes 106 and 107 for the first and second bolts.
On the other hand, the table 103 is provided with first and second bolt insertion holes 108 and 109 corresponding to the tap holes 106 and 107 for the first and second bolts, respectively.
No. 05 is passed through the first and second bolt insertion holes 108 and 109 from the table 103 side and screwed and fixed to the tap holes 106 and 107 for the first and second bolts of the slide base 100.

[0004]

However, in the case of the above-mentioned conventional technique, as shown in FIG. 3B, the first and second bolts are attached to the mounting portions of the slides 100 on the upper surface of the table 103. The insertion holes 108 and 109 are opened. When two first and second bolts 104 and 105 are used, a total of four bolt insertion holes 108 and 109 are opened corresponding to each slide base 100.

When various devices such as a work table and a tool rest are mounted on the upper surface of the table 103, the bolt insertion holes 108 and 109 must be avoided, and the bolt insertion hole 10 must be avoided.
If the number of 8, 109 is large, there is a problem that the usable effective area of the upper surface of the table 103 is narrowed.

Therefore, it is conceivable to reduce the number of bolts for fastening the slide base 100, but if this is done, the fastening strength between the slide base 100 and the table 103 will be weakened.

The present invention has been made to solve the above-mentioned problems of the prior art, and the purpose thereof is to:
An object of the present invention is to provide a linear motion guide device capable of increasing the effective area of the table without impairing the fastening strength.

[0008]

In order to achieve the above object, according to the present invention, a track rail and a predetermined interval in the width direction of the track rail are mounted on the track rail via a number of rolling elements. In a linear motion guide device including a slide base fixed to a table by first and second bolts spaced apart from each other, a first bolt tap hole is provided on a table fixing surface of the slide base. Is provided, and the first bolt is screwed and fixed through the first bolt insertion hole provided in the table into the tap hole for the first bolt, while a fixing flange is provided on one side of the slide base. A second bolt insertion hole is provided in the fixing flange, and the second bolt is screwed and fixed through the second bolt insertion hole into a tap hole for the second bolt provided on the slide base fixing surface of the table. Is characterized by.

A plurality of first bolt tap holes are provided,
It is characterized in that they are arranged side by side in the axial direction of the track rail.

[0010]

According to the present invention, the table and the slide base are fixed by screwing the first bolt through the first bolt through the first bolt into the tap hole for the first bolt of the slide base. From the second bolt insertion hole provided in the fixing flange of the slide base, the second bolt is screwed into the tap hole for the second bolt on the back surface of the table.

Therefore, since there is only the first bolt insertion hole on the upper surface of the table, the effective area that can be used when incorporating various devices such as a work table and a tool post becomes large.

Further, since the fixing flange and the table are fastened by the second bolt, the fastening strength between the slide base and the table is high.

Further, the fixing flange is provided only on one side, and when two sets of linear motion guide devices are used, the fixing flange is arranged outside the two track rails.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

FIG. 1 shows a guide device for linear movement according to the present invention.

That is, reference numeral 1 designates a slide base, which is mounted on a track rail 2 through a large number of balls B as rolling elements and is separated by a predetermined distance in the width direction of the track rail 1. First and second bolts 4, 5 arranged as
Therefore, it is fixed to the table 3.

A first bolt tap hole 6 is formed on the table fixing surface of the slide base 1, and a first bolt insertion hole 7 formed in the table 3 is passed through the first bolt tap hole 6 to form a first bolt insertion hole 7. The bolt 4 is screwed and fixed.

On the other hand, a fixing flange 8 is provided on one side of the slide base 1 so as to be located on the side of the track rail 2, and a second bolt insertion hole 9 is provided in this fixing flange 8. There is. The table 3 is passed through the second bolt insertion hole 9.
The second bolt 5 is screwed and fixed in the second bolt tap hole 10 provided on the slide base fixing surface.

The slide base 1 is a high-rigidity block body having a substantially U-shaped cross section that opens downward, and has left and right skirt portions 11 and 12.
The left and right skirt portions 11, 12 are provided with a horizontal portion 13 integrally connecting the upper ends thereof, and the left and right skirt portions 11, 1
2 is configured to sandwich the side surface of the track rail 2 via the ball B. Four rows of balls B are provided on the left and right side surfaces of the track rail 2, two rows above and below, and each ball row has a ball rolling groove 14, which is provided on the opposing surface of the track rail 2 and the left and right skirt portions 11, 12. It is installed between 15. Each ball B is escaped to a ball escape hole 16 provided in parallel with the ball rolling groove 14 through a direction change path (not shown) in a side cover 14 provided at both ends of the slide base 1. It is configured to cycle infinitely.

The first bolt tap hole 6 is provided near the center of the horizontal portion 17 in the width direction, and the first tap hole 6 for the bolt is 2 in the axial direction.
They are arranged side by side. Of course, the number of the first bolt tap holes 6 may be one or three or more.

On the other hand, the fixing flange 8 projects laterally from the upper end of one side of the skirt portion 14 of the block body 11 and is formed over the entire length of the block body 11 in the longitudinal direction. Two second bolt insertion holes 9 provided in the fixing flange 8 are also provided in the axial direction. The number of the second bolt insertion holes 9 is also arbitrary, and even one,
It may be three or more.

Reference numeral 17 is a ball retainer for preventing the ball B from falling off when the slide base 1 is removed from the track rail 2. Reference numeral 18 is for preventing dust from entering the ball rolling grooves 14 and 15. A sealing member 19 for preventing is a nipple for supplying a lubricant such as grease between the ball rolling grooves 14 and 15. Reference numeral 20 is a blind lid for closing the first bolt insertion hole 7.

In the present invention, the table 3 and the sliding base 1 are
Is fixed to the first bolt tap hole 6 of the slide base 1 from the first bolt insertion hole 7 of the table 3 through the first bolt 4 and the fixing flange 8 of each slide base 1 is fixed.
It is screwed into the second bolt tap hole 10 on the back surface of the table 3 from the second bolt insertion hole 9 provided on the table 3 through the second bolt 5. Since the second bolt is fastened between the bed 22 and the table 3, the second bolt is tightened by a tool 33 such as an L wrench so as not to interfere with the bed 22.

FIG. 2 shows an example of the structure of the table when the sliding base 1 is used.

In this example, two slide rails 1, two in total, are attached to two track rails 2 and 2 laid parallel to each other, and a table 3 is fixed to each slide stand 1. Is.

As described above, since only the first bolt insertion hole 7 is provided on the upper surface of the table 3, when the various devices such as the work table and the tool post are incorporated, the first and second bolt insertion holes are inserted as in the conventional case. The effective area that can be used becomes larger than that when both holes 7 and 9 are provided.

Further, since the fixing flange 8 and the table 3 are fastened by the second bolt 5, the fastening strength is high.

Here, the fastening strength will be briefly described in relation to various loads applied to the table 3.

The radial load F1 (the direction in which the slide base 1 is pressed against the track rail 2) does not affect the tension of the first and second bolts 4 and 5, so that the conventional slide base shown in FIG. There is no difference with the fixed structure of.

When a reverse radial load F2 (a direction in which the slide base 1 is pulled away from the track rail 2) is applied, a moment M1 is generated in a direction in which the left and right skirt portions 11 and 12 of the slide base 1 are expanded and the horizontal portion 13 is bent downward. However, since the central portion of the horizontal portion 13 is fixed to the table 3 by the first bolt 4, the deformation of the horizontal portion 13 can be prevented and the rigidity of the slide base 1 can be maintained.

Also, when a horizontal load F3 is applied, a moment M1 is generated in the direction in which the skirt portions 11 and 12 are widened and the horizontal portion 13 is bent downward. It is possible to prevent deformation and maintain the rigidity of the slide base 1.

Next, consider the case where a moment load is applied to the table 3.

Pitching direction (table 3
When a moment load MA is applied in the direction in which the front and rear ends of the sliding table 1 are moved up and down in opposite directions, a radial load is applied to one of the front and rear ends of the slide base 1, and a reverse radial load is applied to the other end. As described in the case where the load is applied, high rigidity of the slide base 1 can be obtained.

Rolling direction (Table 3
When a moment load MB is applied in a direction in which the left and right side edges of the slider are moved up and down in opposite directions), the radial load acts on one of the slides 1 arranged on the left and right and the reverse radial load acts on the other. As a result, high supporting rigidity of the slide base 1 can be obtained.

The yaw direction (table 3
The direction to move the front and rear ends of the
When the moment load MC is applied, the high rigidity of the slide base 1 can be obtained, which corresponds to the case where a horizontal load is applied.

[0036]

As described above, according to the present invention,
Since the first bolt is screwed and fixed to the slide base from the table side, and the second bolt is screwed and fixed to the table from the fixing flange side of the slide base, the first bolt insertion hole is formed on the table upper surface. Therefore, the effective area of the usable table can be increased without impairing the fixing strength of the slide base.

[Brief description of drawings]

FIG. 1 (a) is a sectional view of a main part of a linear motion guide device according to an embodiment of the present invention, and FIG. 1 (b) is a partially cutaway side view.

2 (a) is a top view of a table incorporating the linear motion guide device of FIG. 1, and FIGS. 2 (b) and 2 (c) are explanatory views for explaining a load applied to the table.

FIG. 3 (a) is a sectional view of a main part of a conventional linear motion guide device, and FIG. 3 (b) is a top view of a conventional table incorporating the linear motion guide device of FIG. 3 (a). is there.

[Explanation of symbols]

 1 Sliding Base B Ball (Rolling Element) 2 Track Rail 3 Table 4, 5 First and Second Bolts 6 First Bolt Tap Hole 7 First Bolt Insertion Hole 8 Fixing Flange 9 Second Bolt Insertion Hole 10 Second tap hole for bolt

Claims (2)

[Claims] 1. A table rail is fixed to a table by a track rail and first and second bolts which are assembled to the track rail via a number of rolling elements and are arranged at a predetermined distance in the width direction of the track rail. A guide device for linear motion including a slide base, wherein a first bolt tap hole is provided on a table fixing surface of the slide base, and the first bolt tap hole is provided on the table. The first bolt is screwed and fixed through the bolt insertion hole of the second base, while the fixing flange is provided on one side of the slide base, and the second bolt insertion hole is provided in the fixing flange. A guide device for linear movement, wherein a second bolt is screwed and fixed in a tap hole for a second bolt provided on a slide base fixing surface of the table through an insertion hole. 2. A plurality of first tap holes for bolts are provided,
The linear motion guide device according to claim 1, wherein the guide devices are arranged side by side in the axial direction of the track rail.