JP2542067Y2 - Linear motion rolling guide unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion rolling guide unit for linearly guiding a movable body to be moved in a linear motion mechanism such as a machine tool or an industrial robot.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of linear motion rolling guide unit, there is one shown in FIGS.

As shown in the drawing, the linear motion rolling guide unit includes a track rail 11 having a track groove 11a formed on each of the left and right sides along the axial direction, and a rolling element circulation path 12 (details will be described later). ), And a slide unit 13 that can move relative to the track rail 11;
That is, the track rail 11 and the slide unit 1 circulate in the rolling element circulation path 12 while rolling on the track groove 11 a with the movement of the slide unit 13 and the slide unit 13.
Numerous balls 1 as rolling elements that apply a load between 3
4.

The slide unit 13 includes a casing 16
A pair of end caps 17a and 17b coupled to both ends of the casing 16;
a and 17b with two seals 18a and 18b attached to the outer surface of each. A grease nipple 19 for supplying grease to the ball 14 is attached to the end cap 17a. FIG.
As shown in FIG. 1, the rolling element circulation paths 12 are formed in the load raceway grooves 1 formed in the casing 16 linearly and parallel to each other.
2a and return path 12b, and both end caps 17
and a pair of semicircular turning paths 12c and 12d formed in the load track grooves 12a and the return path 12b at both ends thereof. Note that the load raceway groove 12a corresponds to the raceway groove 11 of the track rail 11.
a.

As shown in FIGS. 5, 7 and 8, the holding member 2 extends along the load track groove 12a.
0 is provided. The holding member 20 is provided on the slide table 13.
When the ball 14 is removed from the track rail 11, the ball 14 is held so that the ball 14 does not come out of the load track groove 12a. Specifically, the holding member 20 is formed in a strip shape using steel or the like as a material, and is attached to the slide table 13 at both ends. In addition, as is particularly clear from FIG.
The holding member 20 is loosely inserted into a grinding relief groove 11c formed along the bottom of the raceway groove 11a for grinding the raceway groove 11a of the track rail 11.

[0006] The linear motion rolling guide unit having the above-described configuration is disposed, for example, on a bed (not shown) of a machine tool, and the track rail 11 is fixed to the bed by bolts. Then, a table (not shown) for supporting a workpiece or the like is bolted to the slide unit 13 and operates as a movable side. That is, the workpiece is reciprocated by the driving means in a state where the workpiece and the like are placed on the table, and accordingly, the workpiece and the like are subjected to required processing, for example, cutting. As shown in FIG. 5, the track rail 11 has a plurality of bolt insertion holes 11b for fixing to the bed or the like. A plurality of screw holes 16a are formed on the upper surface of the casing 16 of the slide unit 13, and the table is provided with bolts (not shown) which are screwed into the screw holes 16a.
Is fastened to the slide unit 13.

[0007]

In the linear motion rolling guide unit described above, the track rail 11 and the slide unit 13 are separately packaged, transported, and stored. Ball 14 existing on the track of slide unit 13
Is in contact with the holding member 20 due to the weight of the ball itself, vibration during transportation, and the like. For this reason, the holding member 20 may gradually loosen. In this case, a state occurs in which the holding member 20 slides on the bottom surface of the grinding escape groove 11c, and this becomes a sliding resistance, which hinders a smooth operating state of the slide table 13. If the slack is excessive, the holding member 20 cannot fulfill its function, and the slide unit 1
When the track 3 is removed from the track rail 11, the ball 14 may fall off.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a linear motion rolling guide unit which suppresses the occurrence of loosening of a holding member.

[0009]

According to the present invention, there is provided a track rail having a track formed along a longitudinal direction, and a rolling element circulation path including a load track groove corresponding to the track, the track rail having a track. And a plurality of rolling elements arranged and accommodated in the rolling element circulation path to apply a load while rolling on the track, and extending along the load track groove. A linear motion rolling guide unit having a holding member attached to the slide base at both ends to prevent the rolling element from falling out of the load raceway groove, wherein the holding member faces the load raceway groove; It is configured to be attached in a state where a moment is applied to both ends so as to protrude.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A linear motion rolling guide unit according to an embodiment of the present invention will be described with reference to the accompanying drawings. Since the linear motion rolling guide unit is configured similarly to the conventional linear motion rolling guide unit shown in FIGS. 5 to 8 except for the portions described below, the description of the entire unit is omitted. Only the main part will be explained. In the following description, the same reference numerals are used for the same components as those of the conventional linear motion rolling guide unit.

As shown in FIGS. 1 and 2, in the linear motion rolling guide unit according to the present invention, the linear motion rolling guide unit is arranged and accommodated in the rolling element circulation path 12 of the slide unit 13 along the track groove 11 a of the track rail 11. A holding member 1 is provided to prevent a large number of balls 14 that apply a load while rolling from coming off from a load raceway groove 12 a forming a part of the rolling element circulation path 12.

The holding member 1 is formed in an elongated band shape using, for example, spring steel or the like as a material.
, And attached to the slide unit 13 at both ends. More specifically, in order to grind the track groove 11a of the track rail 11, the track rail 11 is loosely inserted into a grinding relief groove 11c formed along the bottom of the track groove 11a. And it is formed as follows.

FIG. 3 shows the holding member 1 before being attached to the slide unit 13. As is apparent from FIG.
2a, and a trajectory 1 of the holding portion 1a formed so as to be continuous with both ends of the holding portion 1a.
and a pair of bent portions 1d which are bent at a predetermined angle α in the direction of the load raceway groove 12a with respect to b and have a hook portion 1c as a locking portion at the distal end. The holding member 1 has, for example, a rectangular cross section perpendicular to the longitudinal direction.

The holding member 1 having the above-described configuration is attached to the slide table 13 as described below.

That is, as shown in FIGS. 2 and 4, the two bent portions 1d are mounted so that the bending angle with respect to the holding portion 1a is smaller than the angle α before the mounting. Thereby, as is clear from FIG.
Mohmets M are provided at both ends of the holding member 1, and as shown by a two-dot chain line in FIG.
It takes a form that swells toward 2a. However, in FIG. 4, the swelling amount of the holding portion 1a is exaggerated, and is actually kept to a small amount, and the holding portion 1a is fixed to both the bottom surface of the grinding relief groove 11c and the ball 14. Are non-contact. As shown in FIG. 2, the end cap 17a (17
A locking recess 17c is formed in b), and the hook 1c of the holding member 1 is hooked and fixed to the locking recess 17c using the restoring force of the holding member 1.

With this configuration, the holding member 1 has an arched shape, increases rigidity, and does not loosen for a long time.

Although a ball is used as a rolling element in the above embodiment, a structure using rollers may be used.

[0018]

[Effects of the Invention] As described above, according to the present invention,
Since the rigidity is increased by applying a moment to both ends of the holding member so as to bulge in an arch shape toward the load raceway groove, there is an effect that the slack of the holding member is suppressed for a long time.

[Brief description of the drawings]

FIG. 1 is a plan view including a cross section of a main part of a linear motion rolling guide unit as an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a plan view showing a state before attachment of a holding member included in the linear motion rolling guide unit shown in FIG. 1;

FIG. 4 is a plan view showing an attached state of the holding member shown in FIG. 3;

FIG. 5 is a perspective view including a partial cross section of a main part of a conventional linear motion rolling guide unit.

FIG. 6 is a front view of a main part of the linear motion rolling guide unit shown in FIG. 5;

FIG. 7 is a plan view including a cross section of a main part of the linear motion rolling guide unit shown in FIGS. 5 and 6;

FIG. 8 is a sectional view taken along the line EE in FIG. 7;

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Holding member 1a Holding part 1c Hook part (locking part) 1d Bent part 11 Track rail 11a Track groove (track) 11c Grinding relief groove 12 Rolling element circulation path 12a Load track groove 13 Slide unit (slide table) 14 Ball ( Rolling element)

Claims (3)

(57) [Scope of request for utility model registration] 1. A slide base having a track rail formed with a track along a longitudinal direction, and a rolling element circulation path including a load track groove corresponding to the track, and being movable relative to the track rail. A plurality of rolling elements arranged and accommodated in the rolling element circulation path to load the rolling elements while rolling on the track; and the slide table extending along the load track groove and at both ends thereof. And a holding member attached to the rolling member to prevent the rolling element from coming out of the load raceway groove, wherein the holding member has both ends so as to bulge toward the load raceway groove. A linear motion rolling guide unit, wherein the linear motion rolling guide unit is mounted in a state where a moment is applied to the portion. The holding member is formed so as to be continuous with both ends of the holding portion corresponding to the load raceway groove, and is provided in a direction of the load raceway groove with respect to an axis of the holding portion. A bent portion having an angle bent and a locking portion with respect to the slide table at a distal end portion, wherein the bending angle of the bent portion with respect to the holding portion is smaller than the predetermined angle. The said moment is provided by being attached to a base, The said moment is provided.
The linear motion rolling guide unit as described. 3. The track according to claim 1, wherein the track comprises a track groove, a grinding relief groove is provided along a bottom of the track groove, and the holding member is loosely inserted into the grinding relief groove. The linear motion rolling guide unit according to claim 1 or 2.