JP2918429B2 - 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 having a track rail, a slider relatively slidable on the track rail, and a rolling element rolling between the track rail and the slider.

[0002]

2. Description of the Related Art Conventionally, a linear motion rolling guide unit has a track rail having track grooves formed on both side walls in the longitudinal direction, and a track groove formed at a position opposed to the track groove to be relatively movable with respect to the track rail. A casing, end caps fixed to both ends of the casing, and rolling elements fitted between the raceway rails and the raceway grooves of the casing. A slider that relatively slides on the track rail has a casing and an end cap. The rolling elements are held on the casing by holding plates.

[0003] As the linear motion rolling guide unit, FIG.
And those disclosed in FIG. FIG. 6 is a sectional view showing an example of a conventional linear motion rolling guide unit, and FIG. 7 is a perspective view showing an example of a holding plate incorporated in the linear motion rolling guide unit of FIG. As shown in FIG. 6, the linear motion rolling guide unit includes an upper raceway surface 12 and a lower raceway surface 13 formed of a substantially C-shaped inclined surface formed on the longitudinal side wall surface 9.
A track rail 1 having a track groove having the following configuration, and a slider 2 slidably movable across the track rail 1. The slider 2 comprises a casing 3 and a casing 3
Has end caps 4 (see FIG. 1) fixed to both ends. The casing 3 is formed with an upper raceway surface 10, a lower raceway surface 11, and a return passage 21 facing the upper raceway surface 12 and the lower raceway surface 13 of the track rail 1. The end cap 4 has an upper raceway surface 10 and a lower raceway surface 11
A direction change path 20 communicating with the return path 21 is formed. The cylindrical roller 7 is provided between the upper raceway surfaces 10 and 12 of the raceway rail 1 and the casing 3 and the lower raceway surface 11.
And 13, circulates through a track path 22 formed between the end cap 4, a direction change path 20 of the end cap 4, and a return path 21 formed in the casing 3. The cylindrical roller 7 is held by a holding plate 15 fixed to the casing 3 by bolts 16 so as not to fall off. A lower surface seal 23 is attached to a lower surface of the slider 2 constituted by the casing 3 and the end cap 4.

[0004] As shown in FIG. 7, the holding plate 15 extends in the longitudinal direction of the casing 3, and has a guide surface 24 for guiding the cylindrical roller 7 rolling on the track path 22 in the longitudinal direction. I have. An upper raceway surface 10 and a lower raceway surface 11 formed on the casing 3 are formed on both longitudinal edges of the guide surface 24.
A guide edge 25 is formed which is engaged with the corner R of the upper cylindrical roller 7 to prevent the cylindrical roller 7 from falling off the casing 3. Further, a screw hole 18 is formed between the upper and lower guide surfaces 24 in the holding plate 15, and a bolt 16 inserted into a bolt insertion hole 17 formed in the casing 3 is screwed into the screw hole 18, whereby The holding plate 15 is fixed to the casing 3.

[0005]

In the conventional linear motion rolling guide unit, the holding plate 15 is fixed to the casing 3 by bolts 16. For this purpose, a bolt hole 17 for inserting a bolt 16 into the casing 3 is formed, and the holding plate 1
It is necessary to form a screw hole 18 into which the bolt 16 is screwed. Therefore, the manufacturing cost of the linear motion rolling guide unit is increased, and the holding plate 1
Since the mounting structure 5 uses the bolts 16, the assembling time is required, and this also increases the manufacturing cost.

The linear motion rolling guide unit includes an upper raceway surface 1 formed on a raceway rail 1 and a casing 3.
0,12 and lower track surfaces 11,13, a track path 22 formed in the end cap 4, a direction change path 20,
The cylindrical roller 7 circulates and rolls through a circulation path formed by the return passage 21 formed in the casing 3, and the cylindrical roller 7 is configured to cross the crossing on the direction changing path 20 and change its direction. I have. However, the casing 3 has an upper raceway surface 10 formed on the casing 3.
And a bolt hole 17 for inserting a bolt 16 for mounting the holding plate 15 between the lower raceway surface 11 and
It is necessary to form a screw hole 18 in the holding plate 15 into which the bolt 16 is screwed. Therefore, in the above-described linear motion rolling guide unit, since the screw hole 18 is formed in the holding plate 15, the size of the guide surface 24 of the holding plate 15 is restricted, and the guide surface 24 cannot be formed large. There is a problem that a rolling element having a large diameter and length of the cylindrical roller 7 cannot be used, and the rated load is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problem, and when a holding plate for holding a cylindrical roller that circulates and rolls is fixed to the casing, bolts are attached to the casing as in the prior art. Since there is no need to form a bolt hole for insertion and no need to form a screw hole in the holding plate, a guide surface for guiding the cylindrical roller can be formed in the holding plate in a sufficient size, and a large-diameter and long cylinder By providing a linear motion rolling guide unit that enables the use of rollers and that can securely and easily fix the holding plate that holds the cylindrical rollers to the casing with one touch, thereby greatly reducing the manufacturing cost. is there.

[0008]

The present invention is configured as follows to achieve the above object. That is,
The present invention relates to a track rail having a track groove formed on a side wall surface in a longitudinal direction, a casing having a track groove formed opposite to the track groove, and end caps respectively attached to both ends in the longitudinal direction of the casing. A cylindrical roller that rolls between the track grooves of the track rail and the casing, and a linear motion rolling guide unit that has a holding unit that holds the cylindrical roller, wherein the holding unit is opposed to a longitudinal direction of the casing. A holding plate that extends and holds the cylindrical roller, the holding plate is engaged with the holding plate from the outside, supports the holding plate in a pressed state on the casing, and is further provided with a locking claw in a locking hole of the end cap. The present invention relates to a linear motion rolling guide unit, comprising a fixed band that can be locked.

In this linear motion rolling guide unit, the holding plate cooperates with a guide surface formed on the casing to hold the end surface of the cylindrical roller in a longitudinal direction and to lock the casing with the guide surface. And a projection for engaging and positioning the groove.

[0010] In the linear motion rolling guide unit, the fixing band has a holding portion which fits into an engagement groove formed in a longitudinal direction of the holding plate and the end cap. And a locking claw extending from the tip of the bent portion toward the end cap.

In this linear motion rolling guide unit, an upper raceway surface and a lower raceway surface are formed in the raceway grooves of the raceway rail and the casing, and the cylindrical rollers are opposed to the upper raceway. Rolling is performed between an upper raceway formed between the surfaces and a lower raceway formed between the lower raceways facing each other.

In this linear motion rolling guide unit, a projection is provided on one of the holding plate side of the holding portion of the fixed band and the fixed band side of the holding plate, and the projection is provided on the other. Are formed with engaging holes for fitting.

[0013]

The linear motion rolling guide unit according to the present invention is constructed as described above and operates as follows. That is, in this linear motion rolling guide unit, end caps are attached to both end surfaces in the longitudinal direction of the casing, and the cylindrical rollers are connected between the direction changing path formed in the end cap, the return path formed in the casing, and the upper raceway surface and the lower side. Cylindrical rollers are fitted in the raceways formed between the raceway surfaces, and the holding plate is attached to the slider including the casing and the end cap. Next, the holding portion of the fixing band is fitted into the engagement grooves formed on the track rail sides of the holding plate and the end caps located on both sides of the holding plate, and then the engagement grooves formed on the end face of the end cap. The engaging portions formed at the ends of the fixing band are engaged with the engaging holes formed at the ends of the engaging grooves of the end cap. Let it. In this way, the holding means consisting of the holding plate and the fixing band can be fixed to the slider consisting of the casing and the end cap with one touch and securely, and the cylindrical rollers can be prevented from falling off the casing.

Further, the holding plate attached to the slider can be fixed by pressing the holding band from outside the holding plate without inserting the bolt into the bolt insertion hole formed in the casing and without forming a screw hole in the holding plate. So do
The guide surface of the holding plate can be formed in a large size without considering the screw hole area, and the outside diameter and length of the cylindrical roller that rolls on the track path can be increased by forming the guide surface of the holding plate large. The rated load of the linear motion rolling guide unit can be increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a linear motion rolling guide unit according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a central portion of an embodiment of a linear motion rolling guide unit according to the present invention, FIG. 2 is a perspective view of a central portion of an end cap in FIG. 1, and FIG. FIG. 4 is an exploded view showing a holding unit and a fixing band that are configured.
In each of the drawings, components having the same functions as those of the components shown in FIGS. 6 and 7 are denoted by the same reference numerals.

This linear motion rolling guide unit is, for example,
It has basically the same configuration as the linear motion rolling guide unit shown in FIGS. 6 and 7, and is characterized in that the holding plate is attached with a fixed band without using bolts in this configuration. .

As shown in FIG. 6, the linear motion rolling guide unit includes a track rail 1 having a track groove 26 formed in the longitudinal side wall surface 9 and a track groove 27 formed opposite to the track groove 26. End caps 4 attached to both ends of the casing 3 in the longitudinal direction,
It has a cylindrical roller 7 that rolls between the raceway surfaces 10 and 12 and 11 and 13 between the raceway rail 1 and the casing 3, and holding means for holding the cylindrical roller 7. As shown in FIGS. 1 and 3, the holding means extends in the longitudinal direction of the casing 3 and holds the cylindrical roller 7 and engages with the holding plate 5 to support the holding plate 5. And a fixing band 6 that can be locked to the end cap 4.

The holding plate 5 is made of a material such as plastic, and cooperates with a guide surface 24 formed on the casing 3 to hold the end surface of the cylindrical roller 7 in a longitudinally extending guide surface 2.
4 and a guide edge 25 formed at the edge of the guide surface 24. Further, the holding plate 5 is provided with a projection 8 which is engaged with the locking groove 28 of the casing 3 by the fixing band 6. The fixing band 6 is made of an elastic metal plate such as steel, and is held by a holding portion 31 fitted into an engagement groove 29 formed in the longitudinal direction of the holding plate 5.
Bent portion 32 bent in a direction away from the track rail 1 and fitted into an engagement groove 30 formed in the longitudinal direction of the end cap 4, and a locking claw 33 extending from the tip of the bent portion 32 to the end cap 4 side It is composed of

The bent portion 32 of the fixing band 6 fits into the engaging groove 30 of the end cap 4, and the locking claw 33 of the fixing band 6 engages with the locking groove formed at the end of the engaging groove 30 of the end cap 4. The fixing band 6 is fitted into the hole 38, the fixing band 6 is fixed to the end cap 4, and the holding plate 5 is supported by the casing 3.
Therefore, the convex portion 8 of the holding plate 5 is engaged with the locking groove 28 of the casing 3.
When fixed with the fixing band 6 in the state of pressing
The cylindrical roller 7 is fitted between the guide surface 19 of the casing 3 and the guide surface 24 of the holding plate 5, and prevents the cylindrical roller 7 from falling off the casing 3 at the guide edge 25 of the holding plate 5.

The track groove 26 of the track rail 1 has an upper track surface 12 and a lower track surface 13 formed of inclined surfaces. The raceway groove 27 of the casing 3 has an upper raceway surface 10 and a lower raceway surface 11 formed of inclined surfaces. The track groove 26 of the track rail 1 is formed above and below the rail groove 14 along the rail groove 14 extending in the longitudinal direction of the side wall surface 9. The holding plate 5 constituting the holding means is fitted into the rail groove 14, and the holding plate 5 is supported by the fixed band 6 in a state of being in contact with the casing 3. The cylindrical roller 7 has an upper raceway 22 formed between the upper raceways 10 and 12 facing each other and a lower raceway 22 formed between the lower raceways 11 and 13 facing each other. 22 and rolled.

Next, another embodiment of the linear motion rolling guide unit will be described with reference to FIG. FIG. 4 shows a holding plate 35 and a fixing band 36 constituting the holding means. Compared with the holding means of the above-described embodiment, this holding means is provided with a locking member in which one of the protrusions is fitted to the other and the other is fitted to secure the engagement between the holding plate 35 and the fixing band 36. The difference is that holes are provided. In FIG.
The holding plate 35 has a locking hole 34 and a fixing band 36.
Has a projection 37 that fits into the locking hole 34. Although not shown, the fixing band 36 may be provided with a locking hole 34 and the holding plate 35 may be provided with a projection 37 that fits into the locking hole 34. When the holding means is configured as described above, it is not always necessary to form the engaging groove 29 in the longitudinal direction of the holding plate 35, but in order to fit the holding portion 31 of the fixing band 36 into the holding plate 35 due to space limitations. It is preferable to form an engagement groove 29 in advance. The projection 37 of the fixing band 36 is fitted into the locking hole 34 of the holding plate 35, and the locking claw 33 of the fixing band 36 is fitted into the locking hole 38 of the end cap 4. It is fixed, and the holding plate 35 is supported by the casing 3 in a pressed state.

Next, still another embodiment of the linear motion rolling guide unit will be described. In this embodiment, as long as the cylindrical roller 7 can be prevented from falling off the casing 3, the guide edges formed on both longitudinal edges of the guide surface 19 are unnecessary. The length of the holding plate 5 is the same as the length of the casing 3, and both ends in the longitudinal direction are in contact with the inner surfaces of the end caps 4 provided at both ends of the casing 3. It may be configured to be longer than the entire length of the casing 3 and to be in contact with the inner surface of the end cap 4. Further, convex portions are formed at both ends in the longitudinal direction of the holding plate 5 set to be longer than the entire length of the casing 3, and the end cap 4 is formed.
May be configured to fit into a concave portion formed on the inner surface of.

Another embodiment of the linear motion rolling guide unit will be described with reference to FIG. In this embodiment, the shape of the fixing band 6 is such that the free end side of a bent portion 32 formed by bending both ends of the holding portion 31 at right angles in the same direction is formed on a locking portion 41 which is enlarged. In order to make the locking portion 41 elastic, a slit 39 is formed in the locking portion 42, and the tip portion is formed to be elastically deformable. The locking claw 42 is engaged by engaging the locking claw 42 by elastically deforming the locking portion 41 of the fixing band 12 into the locking hole 40 formed at the end of the locking groove 30 formed in the end cap 4. The fixing band 6 is fixed to the end cap 4 by being locked in the blind hole 40, and the holding plate 5
Are supported by the casing 3.

In this linear motion rolling guide unit, although not shown, the holding plate 5 and the fixed band 6
In the above-described embodiment, the slider 2 is manufactured separately and incorporated in the slider 2. However, the holding plate 5 and the fixing band 12 may be integrally fabricated and incorporated in the slider 2.

This linear motion rolling guide unit is configured as described above. To attach the holding plate 5 to the casing 3, for example, it can be attached as follows. End caps 4 are provided at both ends in the longitudinal direction of the casing 3.
And the direction changing path 2 formed in the end cap 4.
0, a plurality of cylindrical rollers 7 are fitted into the return passage 21, the upper raceway surface 10, and the lower raceway surface 11 formed in the casing 3, and the end caps 4 located at both ends of the casing 3
The holding plate 5 is disposed between the cylindrical rollers 7 disposed on the upper raceway surface 10 and the lower raceway surface 11, and the projection 8 of the holding plate 5 is engaged with the locking groove 28 of the casing 3. To stop. Next, the engaging grooves 2 formed on the track rail 1 side of the holding plate 5 and the end caps 4 located on both sides of the holding plate 5 respectively.
The holding portion 31 and the bent portion 32 of the fixing band 6 are fitted into the fixing members 9 and 30, and the locking claws 33 formed on the fixing band 6 are engaged with the locking holes 38 formed on the end cap 4 on the opposite side of the casing. Let it. Thus, the holding means is incorporated in the slider 2.

[0026]

The linear motion rolling guide unit according to the present invention is configured as described above and has the following effects. That is, in this linear motion rolling guide unit, the holding means for holding the cylindrical rollers extends in the longitudinal direction of the casing and is engaged with the holding plate for holding the cylindrical rollers and supports the holding plate by engaging with the holding plate. And a fixing band that can be locked to the end cap, so that a bolt inserted through a bolt hole formed in the casing is screwed into a screw hole formed in the holding plate as in a conventional linear motion rolling guide unit. Since there is no need to insert the linear motion rolling guide unit, the manufacturing cost of the linear motion rolling guide unit can be reduced.

In this linear motion rolling guide unit, as described above, the holding plate for holding the cylindrical roller that moves from the upper and lower raceways to the circulation path by the casing is fixed by the fixing band. Therefore, there is no need to drill a bolt hole in the casing. In particular, since it is not necessary to form a screw hole into which the bolt is screwed into the holding plate, the effective area of the guide surface of the holding plate can be increased as much as the screw hole. A cylindrical roller having a larger outer diameter and a longer length than the guide unit can be used. As a result, the rated load of the linear motion rolling guide unit can be increased.

In addition, as described above, the assembly of the linear motion rolling guide unit does not require the use of bolts for fixing the holding plate to the casing, and the engaging plate formed on the holding plate and the end cap incorporated in the casing. The holding means can be attached to the casing and the end cap simply by fitting the fixing band into the groove and engaging the locking claw formed on the fixing band with the engaging hole formed on the end cap. The assembled holding plate can be fixed with one touch. Accordingly, the time required for assembling the slider is reduced, and the manufacturing cost can be reduced from this point as well.

[Brief description of the drawings]

FIG. 1 is a perspective view of a linear motion rolling guide unit according to an embodiment of the present invention, with a central portion cut away.

FIG. 2 is a perspective view of a center portion of an end cap of the linear motion rolling guide unit of FIG.

FIG. 3 is an exploded view showing one embodiment of a holding plate and a fixing band in the linear motion rolling guide unit of FIG. 1;

FIG. 4 is an exploded view showing another embodiment of the holding plate and the fixing band in the linear motion rolling guide unit of FIG. 1;

FIG. 5 is a perspective view showing another embodiment of the end cap and the fixing band in the linear motion rolling guide unit of FIG. 1;

FIG. 6 is a sectional view showing an example of a conventional linear motion rolling guide unit.

FIG. 7 is a perspective view showing an example of a holding plate incorporated in the linear motion rolling guide unit of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Track rail 2 Slider 3 Casing 4 End cap 5, 35 Holding plate 6, 36 Fixed band 7 Rolling element 8 Convex part of holding plate 9 Side wall surface 10 Upper track surface of casing 11 Lower track surface of casing 12 Upper side of track rail Track surface 13 Lower track surface of track rail 14 Rail groove 24 Guide surface of holding plate 25 Guide edge of holding plate 26 Track groove of track rail 27 Track groove of casing 28 Engagement groove of casing 29 Engagement groove of holding plate DESCRIPTION OF SYMBOLS 30 Engagement groove of end cap 31 Holding part 32 Bent part 33, 41 Engagement claw 34 Engagement hole 37 Projection 38 Engagement hole of end cap 39 Slit of fixing band 40 Engagement hole of end cap 42 Engagement of fixing band nail

Continuation of the front page (56) References JP-A-63-53314 (JP, A) JP-A-3-4021 (JP, A) Japanese Utility Model Application No. 59-105622 (JP, U) Japanese Utility Model Application No. 57-165820 (JP-A) , U) Actually open 58-76824 (JP, U) Actually open 63-121816 (JP, U) Actually open sho 59-103926 (JP, U) Actually open 1-63817 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) F16C 29/04-29/06

Claims (5)

(57) [Claims] 1. A track rail having a track groove formed in a longitudinal side wall surface, a casing having a track groove formed opposite to the track groove, and ends respectively attached to both ends in a longitudinal direction of the casing. cap, said track rail and cylindrical rollers that roll along between the raceway groove of the casing, and the linear motion rolling guide unit having a holding means for holding the cylindrical rollers, wherein the retaining means in the longitudinal direction of the casing a holding plate and holding the cylindrical rollers extending oppositely to the holding plate
The holding plate is supported by being pressed against the casing by being engaged from the outside, and a locking claw is further provided in a locking hole of the end cap.
Linear motion rolling guide unit characterized in that it is composed of a locking can be fixed band in. 2. The positioning plate engages with a guide surface formed in the casing and cooperates with a guide surface extending in a longitudinal direction for holding an end surface of the cylindrical roller and a locking groove of the casing. The linear motion rolling guide unit according to claim 1, further comprising a projection. 3. The fixing band has a holding portion that fits into an engagement groove formed in a longitudinal direction of the holding plate and the end cap, and a bent portion bent from the holding portion in a direction away from the track rail. 2. The linear motion rolling guide unit according to claim 1, further comprising the locking claw extending from a tip end of the bent portion toward the end cap. 3. 4. An upper raceway surface and a lower raceway surface are formed in each of the raceway grooves of the raceway rail and the casing,
The cylindrical roller rolls on an upper raceway formed between the upper raceways facing each other and a lower raceway formed between the lower raceways facing each other. Item 2. The linear motion rolling guide unit according to Item 1. 5. A projection is provided on one of the holding plate side of the holding portion of the fixed band and the fixed band side of the holding plate, and a locking hole into which the projection is fitted is provided on the other. The linear motion rolling guide unit according to claim 1, wherein the linear motion rolling guide unit is formed.