JPS6025628A - Table assembly for straight sliding - Google Patents

Abstract

PURPOSE:To impart any desired pressure to a rolling body which bears the load, and to provide adjustability for the imparted pressure, by furnishing a tapered gib between slide tables and a mount table to be installed at the oversurface of said slide tables. CONSTITUTION:A pair of track tables 2 are mounted on the mounting reference surface 7 of a bed 1 using bolts 8. On these track tables 2 two pairs of slide tables 3 make straight reciprocation under guidance, circulating along a pair of endless tracks 9 formed at each slide table 3, wherein a number of balls 4 are bearing the load between the track tables 2 and slide tables 3. A mount table 5 is installed at the oversurfaces of the slide tables 3 and fixed by bolts 10a, 10b oriented in the width direction of the slide tables 3, and a tapered gib 6 is interposed between the slide tables 3 and mount table 5. This tapered gib 6 is advanced and retracted in the direction of bolts within a certain range determined by long holes 11a, 11b formed in the tapered gib 6, by loosening the bolts 10a, 10b.

Description

[Detailed Description of the Invention] This invention provides an x-y
-Z-axis, automatic tool changer, automatic welding machine, injection molding machine,
This invention relates to a linear sliding table assembly that is frequently used in the sliding parts of general industrial machines such as industrial robots.

Generally, a linear sliding table used in such a sliding part is required to be able to be assembled with high precision, to have good positioning and repeatability, and to have a long life.

However, if there is wobbling in the rolling elements such as balls or rollers that are built into a linear sliding table and have a negative weight between the track and the sliding table, the inertia will increase when the direction of reciprocating movement changes. The hammer action and prying load caused by the moment 42 will instantaneously apply an impact load several times higher, which will shorten the life of the product.

Positioning and repeat accuracy deteriorate due to the looseness.

Therefore, in this type of linear sliding table, in order to eliminate the above-mentioned wobbling, the rolling elements (2 pressurized) are applied to increase the contact rate of all rolling elements, thereby improving the load capacity and life. things are being done.

This is because the table is equipped with a bearing structure in which pressurization is applied to the rolling elements that apply the load between the slide table and the track base by giving the slide table a rotational twist. The same is true for assemblies. 5 The present inventor previously proposed a method of interposing a shim between the sliding base and the mounting base and a method of making the upper surface of the sliding base a tapered surface as a means of applying pressurization. (Patent Application No. 57-049170)
.

However, with the method of inserting shims between the sliding base and the mounting base, it is not necessary to increase or decrease the number of shims installed in order to adjust the target pressurization, and it is necessary to repeatedly insert the shims each time. Adjusting the pressurization is extremely complicated because the moving base and the mounting base must be assembled, and furthermore, there is the problem that the pressurization cannot be adjusted after being assembled into the device unless it is disassembled. there were. In addition, with the method of making the top surface of the slide table a tapered surface, it is necessary to perform a complicated taper process on the top surface of the slide table, which increases the cost. This limits the versatility of the bearing structure, and furthermore, the pressurization cannot be adjusted after it is installed in a device.

In view of this, the present invention includes a tapered gib interposed between a sliding table and a mounting base attached to the upper surface of the sliding table,
Utilizing the difference in wall thickness between the proximal end and the distal end of the taper gib, a rotational twist is given to the sliding base when the sliding base and the mounting base are connected with a fastening bolt, This allows pressurization to be applied to rolling elements such as balls and rollers that apply a load between the slide table and the way, and the tapered gib can be moved forward and backward along the width direction (two directions) of the top surface of the slide table. The present invention provides a linear sliding table assembly in which the magnitude of pressurization can be easily adjusted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The linear sliding table assembly of the present invention will be described below based on embodiments shown in the accompanying drawings.

1-4, a linear sliding table assembly according to an embodiment of the present invention is shown. This table assembly includes a bed (1) having a pair of mounting reference surfaces (7), and each mounting reference surface (7) of this bed (1).
7), a pair of tracks (2) attached by mounting bolts (8), two pairs of sliding tracks (3) that perform linear reciprocating motion guided by these tracks (2), and each of these tracks (2). A large number of balls (4) circulate within a pair of endless tracks (9) formed on the slide table (3) and apply a load between the track table (2) and the slide table (3). , is constructed between the upper surfaces of each of the above-mentioned sliding tables (3), and the 6 sliding tables (3) are connected in pairs in the width direction) (
It is composed of a mounting base (5) fixed by a mount (10b), and a taper gib (6) interposed between each of the sliding bases (3) and the mounting base (5).

As shown in FIGS. 2, 8, and 5, the taper gib (6) has a rectangular planar shape that is approximately the same as the top surface of the slide table (3), and its thickness is approximately the same as the upper surface of the slide table (3). Thickness dl
+d2 from its base end (6a) to its tip (fib)
The above-mentioned fastening poles (loa) (lob) are slidably penetrated in the front-rear direction, that is, from the proximal end (6a) to the distal end (6b).
) A long hole (11aX11.b) is formed that extends toward.

This taper gib (6) has each slide table (3) between the surface and the lower surface of the mounting table (5), and the front and back direction of the slide table (3) is connected to the slide table (3).
3) It is interposed according to the width direction of the top surface, and each fastening pole)
(10a) (], Ob) (Secondly, loosen this taper gib (6) in its front and back direction, that is, slide base (3)
) The base end (6a) of the upper surface in the width direction is the sliding base (3)
It can be moved forward and backward within a range that does not come off the top surface and within a range that is permitted by each long hole (], 1a) (llb) formed in the taper gib (6).

In this embodiment, the mounting base (5) is provided with a side plate 'Q21 on its side, and this side plate u21 and the base end (6&) of the tapered gib (6)
Screw holes (18a) and (18b) having the same axis and different pitches are bored on both sides.

In addition, these side plates (12+) and taper gib (6
) are the screw holes (18a)Q3b) at both ends.
A pressurization adjustment bolt 041 having threaded portions (15a) and (15b) that are screwed together is provided, and by rotating this pressurization adjustment bolt 041, the taper gib (6) can be finely adjusted. It looks like this. Furthermore, the side plate OQ located on the side of the storage stand (5), that is, on the left side in FIG.
3), and a positioning suppression screw 06) is provided at the lower end of the screw 06).
0a) When fastening between the sliding base (3) and the mounting base (5) with (lob), the -
The positioning is performed by pressing the side and pressing the other side of the sliding table (3) against a vertical reference plane 0η formed on the mounting table (5).

In addition, in this embodiment, the above-mentioned track base (2), sliding base (3), and a large number of balls (4) are
9. As shown in the figure. The track base (2) has an upward and downward rolling groove ual on its shoulder and the other side, respectively, and the slide base (3) has a horizontal part a (support). It has a sleeve part (2) hanging down from one end, and is formed in an L-shape in cross section, and the horizontal part (09) and sleeve part (2U) have downward and downward grooves corresponding to the above-mentioned rolling grooves (181) and sleeve parts (2U). An upward load ball groove Q]) and an escape ball hole drilled along each load ball groove 01) are provided, and furthermore, an inner surface is provided at both the front and rear ends of the slide table (3). A lid body (c) having a guide groove on the side is attached, and the guide groove (c) communicates between the load ball groove Q0 and the escape ball hole (2) to prevent the ball (4) from moving. An endless track (9) is configured, and each ball (4) is configured to carry a load between the load ball groove Q]) of the sliding base (3) and the rolling groove (Ill) of the way base (2). It has become.

Furthermore, in this embodiment, the upper surface of the sliding base (3) on which the taper gib (6) is interposed and the lower surface of the mounting base (5) are parallel to each other, and these sliding bases (3) and the mounting base (5), the taper gib (6) has its base end (6
, ) is the key point) Within the range from P+ to point P2, that is, the range that the long hole (lla) provided in this taper gib (6) allows without the base end (6a) coming off the top surface of the slide table (3). This moves the slide table (
3) is rotated around the base end (6a) of the taper gib (6) by changing the degree of rotational twist (tightness θ) from 01 to 0.
2, and the pressurization acting on the ball (4) can be increased or decreased according to the difference in the interference of 1θl-021.

In addition, in the above embodiment, since the top surface of the sliding table (3) and the bottom surface of the mounting table (5) are parallel to each other,
Even when the taper gib (6) is moved back and forth, the height H from the mounting reference surface (7) of the bed (1) to the top surface of the mounting base (5) does not change, and the pressurization can be increased or decreased without changing this height H. It can be performed.

Therefore, according to the linear sliding table assembly of the above embodiment, the taper gib (6) is interposed between the sliding base (3) and the mounting base (5) when assembling the table assembly, and both (10a)
) (10b), the sliding base ( 3
) can be given a rotational twist in the direction of arrow Y,
As a result, a predetermined pressurization can be applied to the ball (4) that applies the load between the track base (2) and the slide base (3), and each of the above-mentioned fastening poles) (10m) (10b) With the bolts loosened, rotate the force ratio adjustment port 04), move the taper gib (6) forward and backward, and tighten each fastening bolt (10a) (10b) again to act on the ball (4). Pressurization can be adjusted.

In the above embodiment, the side plate 02) and the pressurization adjustment pole f+41 are used as means for moving the taper gib (6) forward and backward, but these means are not necessarily necessary. For example, you can hit it with a hammer and push it in, or tighten the fastening bolts (10a) (10
The taper gib may be advanced or retreated by loosening b) and pushing or pulling it out.

Also, from the mounting reference surface (7) of the bed (1) to the mounting base (5)
) To adjust the height H to the top surface by adjusting the longitudinal position of the taper gib (6), as shown in Fig. 12,
The upper surface of the sliding base (3) and the lower surface of the mounting base (5) may be in a non-parallel relationship with each other, and the base end (6a) of the taper gib (6)
By moving back and forth in the front and rear directions, the height (I) can be adjusted within a predetermined range. In addition,'! ￥S
In Figure i2, the distance between the top surface of the sliding base (3) and the bottom surface of the mounting base (5) is large on the base end (6a) side of the taper gib (6) and small on the distal end (6b) side. On the contrary, the above distance is set at the base end (Oa
) side and large on the tip (6b) side. Also, in the case of Fig. 1z, by moving the taper gib (6) forward and backward, the degree of twist in the rotational direction of the slide table (3) can be changed, and accordingly, the degree of twist in the rotational direction of the slide table (3) can be changed. ) can be increased or decreased.

Furthermore, in FIGS. 18 to 15, modified examples of the taper gib (6) are shown. Figure 13 and 1
The tapered gib (6) shown in Figure 4 is attached to the sliding table (3) with the oblique oblong hole (lla) located on the base end (jaw) side as a reference.
Parts of both the left and right corners of the base end (6a) on the surface in contact with the upper surface have tapered parts (A) that become gradually thinner toward the corners, and this taper gib (6) is attached to each slide table. (3)
Connected between the top surface and the mounting base (5) and the bottom surface)
(ioa) (iob) When fastened with When raised, an elastic deformation occurs in the 6 sliding table (3), and the so-called crowning effect (negative Kt1. The taper gib (6) shown in Fig. 15 has a width dimension of 6, which is wider than the sliding base (3) and the mounting base ( 5) is smaller than the interval dimension between the (10a) (lob) of the coma pair that is concluded between the
It is arranged so as to be located between these multiple pairs of fastening poles) (loa) (], Ob). In the case shown in FIG. 15 as well, by deforming both the front and rear 9;

Note that the former has the advantage of being able to set the amount of roughening accurately, and the latter has the advantage of being simple.

Next, FIGS. 16 to 18 show modified examples of the bearing assembly composed of the track base (2), the sliding base (3), and a large number of balls (4) in the above embodiment. . In Figure 16, there are many balls (4) as rolling elements.
Instead, a large number of spherical rollers (4a) are used, and in FIG. 17, the sliding table (3) has a horizontal portion 00 and shaft portions (■) at both ends, and is formed into a substantially U-shaped cross section. (Rolling groove on the second track (2) side (1B+) and sliding base (311)
111 load ball grooves QI) are inclined at an angle of 45° and face each other, and in FIG. 18, the slide table (3) has a cross section as in FIG. 17. It is formed in a substantially U-shape, and has rolling grooves 0 group on the way base (2) side and load ball grooves QI and 1 on the sliding base (3) side.
Both are formed on perpendicular surfaces and face each other. In the table assemblies for straight heald sliding shown in FIGS. 16 to 18, spherical rollers (4a) or balls (4
), and the magnitude of this pressurization can be adjusted.

As described above, according to the present invention, the taper gib interposed between the sliding base and the mounting base allows the slide between the track base and the mounting base to be adjusted according to the difference in wall thickness between the base end side and the distal end side of the taper gib. Desired pressurization can be applied to rolling elements such as balls and rollers that carry loads between them and the table, and the pressurization can also be adjusted by moving this taper gib forward and backward. . Moreover, the above-mentioned pressurization can be easily adjusted by simply loosening each bolt that fastens between the sliding base and the mounting base after the assembly of the table assembly is completed. This is extremely convenient as it can also be used in cases where pressurization adjustment is required.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a linear sliding table assembly according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-n in FIG.
Figure 8 is a sectional view taken along the line T in Figure 2, and Figure 4 is a sectional view taken along the line IV in Figure 2.
-IV arrow view, Figure 5 is a perspective view of the taper gib in Figure 2, Figure 6 is a front view of the bearing part used in this example, Figure 7 is a plan view of Figure 6, Figure 8 is a side view of Fig. 6, Fig. 9 is a sectional view taken along line IX-JX of Fig. 7, Fig. 10 is a sectional view taken along line X-X of Fig. 6, and Fig. 11 shows the tapered gib moved forward and backward. Explanatory diagram explaining the state of the case, 12th
The figure is an explanatory diagram of a modification of the eleventh factor, and FIGS. 18, 14, and 15 are views in the same direction as FIGS. 4, 5, and 8, respectively, showing modifications of the taper gib. , a perspective view, a sectional view, and FIGS. 16 to 18 are partial sectional views showing modified examples of the bearing structure. Code explanation fil... Bed (2)... Track base (3)... Sliding base (4)... Ball (rolling element) (4a)・・・・・・Spherical roller (rolling element) (
5)...Mounting base (6)...Dipagib (6a)...Base end (6b)---Tip (7)... Mounting reference surface (9)...
Endless track (10a) (lob) --- Fastening bolt (1
1aX11b) -...=-Long hole α2...Side brake) (18a) (18b)...Threaded hole 0
Φ・・・Pressure adjustment bolt, (15a) (15b
)......Threaded part)...Tapered part Fig. 11 Fig. 12 Fig. 13 Fig. 14 Fig. 15 Fig. 160 Fig. 17

Claims (5)

[Claims] (1) A bed having a pair of mounting reference surfaces, a pair of tracks attached to the valley mounting reference surfaces of the bed, and a plurality of sliding boards that are guided by each track C2 and perform linear reciprocating motion;
A load is applied between each track and each slide by circulating within a pair of endless tracks formed on each of these slides, and by giving a twist in the rotational direction to each of the slides. It consists of a large number of rolling elements to which pressure is applied, and a mounting base that is installed between the top surfaces of each of the slide tables and fixed with a pair of fastening bolts in the width direction of each slide table. A tapered gib is interposed between the lower surface of the mounting base and the wall thickness becomes gradually thinner from the base end to the distal end. A linear sliding table characterized in that the base end is moved back and forth along the width direction of the upper surface of each sliding table within a range where the base end does not come off the upper surface of each sliding table, and the above-mentioned valley rolling body (two-acting pressurization is adjusted). assembly. (2) The mounting base has a side plate on its side, and the side plate and the proximal end of the taper gib (2) have the same axis with each other, and (1) have threaded holes with a pitch difference between them. The side plate and the taper gib are connected by a pressurization adjustment bolt that has threaded portions at both ends that engage the respective screw holes, and this pressurization adjustment bolt (a patent claim for finely adjusting the taper gib) A table assembly for linear sliding according to item 1. (3) The taper gib has an elongated hole that extends along the width direction of the upper surface of the six slide tables, through which each fastening bolt that connects each slide table and the mounting table can slide. The linear sliding table assembly according to item 1 or 2. (4) The taper give has a tapered part that gradually becomes thinner in both left and right directions on both the left and right corners (1111 corners) of the base end, with each elongated hole located at the base end τIll as a reference. A linear sliding table assembly according to claim 3. (5) The taper gib has a width smaller than the interval between the six pairs of fastening bolts that connect the six sliding bases and the mounting base, and is located between these six pairs of fastening bolts. The linear sliding table assembly according to item 1 or 2.