JPS6224648B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a linear slide that linearly guides a movable body to be slid in a sliding part of a machine tool such as an NC machine or an industrial robot. It relates to dynamic roller bearings, and more specifically, to facilitate the installation of the sliding base that constitutes the bearing to a movable body, and to facilitate the adjustment of the gap between the sliding base and the track base. The present invention relates to a linear sliding roller bearing characterized by the following features.

[Prior art] Conventional linear sliding bearings of this type usually have
A sliding base having a substantially inverted C-shaped cross section with a recess on the lower surface side, a track base whose upper part is fitted into the recess of the sliding base while maintaining a predetermined gap, and the sliding base formed on the sliding base. Balls or rollers It has a large number of balls or rollers that circulate in an endless track, and these balls etc. apply loads in the vertical and horizontal directions that act on the slide platform while guiding linear reciprocating motion along the track platform. It is configured like this.

In such linear sliding bearings,
In cases where strong rigidity is required due to the impact load due to the moment of inertia when changing direction or overhanging, or where high precision is required in positioning or repetitive motion, or where light loads such as measuring instruments are required. It is required to select an appropriate gap depending on the application, such as when high precision is required and the movement of the bearing needs to be lightened.
For example, in conventional linear sliding bearings of this type, the preload as described above can be adjusted by selecting the balls on the sliding base, by changing the amount of cutting of the transfer groove on the way, or by adjusting the preload on the sliding base. The gap between the sliding base and the track base was adjusted using an adjustment bolt from the sleeve.

[Problems to be Solved by the Invention] However, in conventional linear sliding bearings of this type, it is necessary to selectively fit the balls or cut the transfer grooves in situ. It is troublesome to assemble to a movable body, and when a sliding table is assembled to a movable body, the center of gravity may be high, so when a horizontal load is applied, the point of load application is high. Therefore, there was a problem in that the load acting on the ball transfer surface between the sliding base of the bearing and the track base became large.

[Means for solving the problem] This invention was made in view of the above circumstances, and
As a means to solve the above technical problem, a horizontal part and a hanging part hanging down from one end are formed in a substantially L-shape in vertical section, and the bottom surface of the tip of the horizontal part and the inner surface of the lower end of the hanging part are respectively Along the axial direction, a load groove with a transfer surface constituting the load area of the roller track is formed, and on the upper surface side of the tip of the horizontal part and on the outer surface side of the lower end of the hanging part, respectively, along the axial direction. a pair of sliding platform halves in which non-load portions constituting a roller endless track are formed corresponding to each of the load grooves, and each of the sliding platform halves facing each other at a predetermined interval. A top plate is installed between the upper surfaces and is elastically deformable between the pair of sliding table halves, and is attached to the tip of the horizontal part and the lower end of the hanging part of each of the sliding table halves. Two pairs of roller guides that cooperate with the load groove of the hanging part or the load groove and the non-load groove to form a roller endless track, and the upper part of the recess formed by both of the sliding table halves and the top plate. a track base having a transfer surface facing oppositely to the transfer surface of the load groove formed in the horizontal part and the hanging part of each sliding base half, and each of the above-mentioned A large number of rollers circulate within each roller endless track formed on the horizontal part and the hanging part of the sliding table half, and apply a load between the sliding table half side transfer surface and the track side transfer surface. An object of the present invention is to provide a linear sliding roller bearing characterized by comprising:

[Effect] The above technical means works as follows.

In preload adjustment when assembling a sliding base into a movable body that moves along a track base, a sliding base consisting of a pair of sliding base halves and a top plate is temporarily assembled into the movable body using mounting bolts, By adjusting the preload using the adjustment bolt, the top plate is elastically deformed to adjust the gap between the sliding base and the track base, and a preload is applied to the roller. Furthermore, since the sliding table is incorporated by utilizing the rigidity of the movable body, the top plate can be made thin. Further, by making the top plate thin in this manner, the height of the entire bearing can be reduced, and the center of gravity of the movable body can be lowered to improve stability.

[Example] Examples of the present invention will be described in detail below based on the drawings.

FIG. 1 is a cross-sectional view showing the state of use of the first embodiment of the linear sliding roller bearing of the present invention.
As shown in FIG. 2 and FIG. 2, a pair of sliding table halves 1 having a horizontal section 1a and a hanging section 1b hanging down from one end of the horizontal section 1a, each of which has a substantially L-shaped longitudinal section; Two pairs of roller guides 2 attached to the tip of the horizontal part 1a and the lower end of the hanging part 1b of the half body 1 are connected to the upper surfaces of both the slide table halves 1 to form a downward recess 4, and A top plate 3 which can be elastically deformed between the slide table halves 1, a track table 5 whose upper part is fitted into the recess 4 while maintaining a predetermined distance from each other, and a horizontal part 1a and a hanging part 1b. The main part is composed of a large number of rollers 6 that circulate within roller endless tracks formed respectively to apply the load between the slide table half 1 and the track table 5.

As shown in FIGS. 1 and 2, the sliding table half 1 has axes on the lower surface of the tip of the horizontal portion 1a and on the inner surface of the lower end of the hanging portion 1b at approximately 45 degrees. It has a load groove 7 with a transfer surface 7a that constitutes a load area of the roller track along the direction, and the top surface side of the tip of the horizontal part 1a and the hanging part 1b.
On the outer surface side of the lower end, non-load portions 8 forming roller endless tracks are formed along the axial direction in correspondence with the respective load grooves 7 . In addition, at each end of the sliding table half 1 in the longitudinal direction, there are marks shown in FIGS.
A lid 9 made of synthetic resin as shown in the figure is fixed with a fixing bolt 11 passing through a through hole 10 formed in the lid 9.

Further, as shown in FIGS. 7 and 8, the roller guide 2 is formed by press molding of a metal plate or injection molding of hard synthetic resin, and has approximately semicircular rollers at both ends. The holding portion 13 is provided between the roller wrapping portions 12 and has a substantially L-shaped cross section.
This holding part 13 works together with the load groove 7 and the groove-shaped non-load part 8 formed in the horizontal part 1a tip and the hanging part 1b of the sliding table half 1 to control the load range and non-load area of the roller endless track. Along with forming a load area,
Each of the roller running sections 12 is adapted to run and guide the cylindrical rollers, which are the rollers 6, between the loaded area and the unloaded area of the roller endless track. Note that a locking claw 1 is provided at the tip of the holding portion 13 of the roller guide 2 to prevent the roller 6 from falling off.
3a is formed. In addition, in the figure, reference numeral 14 is a through hole drilled in the holding part 13 of the roller guide 2, and the through hole 14 is passed through to each mounting hole (not shown) of the slide table half 1. The roller guide 2 is connected to the sliding base half 1 by screws 15 that are screwed together.
It is designed to be installed in In this case, the roller turning portion 12 of the roller guide 2 is fitted and fixed into a substantially semicircular attachment groove 9a provided in the lid 9.

As shown in FIG. 4, the top plate 3 is formed of a substantially rectangular steel plate, etc., and has a thin walled portion 16 for controlling elastic deformation in the center thereof. 1 and 2), the top plate 3 is placed at a symmetrical position with respect to this thin portion 16.
two mounting holes 17 through which fixing screws 18 are inserted to attach the slide table half 1 to the slide table half 1, and three through holes 15 through which installation bolts 19 are passed through which the slide table half 1 is installed to a movable body A such as a table. and is drilled. Then, the top plate 3 is fixed to each slide table half 1 by screwing fixing screws 18 passing through the mounting holes 17 into screw holes (not shown) provided at the top of the slide table half 1. . In this case, the top plate 3 covers the entire surface of the slide table half 1 and each of the lids 9, and projects slightly from each of the lids 9. When using this,
This is to protect the lid 9 by the top plate 3 when the roller bearing of the present invention performs reciprocating motion and collides with a fixed side of a mechanical device or the like at its terminal position.

In addition, the means for fixing the sliding table half 1 and the top plate 3 is as follows.
It does not necessarily have to be the fixing screw 18, and may be a fixing means such as welding, for example.

On the other hand, as shown in FIGS. 1 and 2, the track 5 is provided with approximately 90° notches 20 on both sides thereof, and the upper surface of each notch 20 is in phase with the load groove 7. Transfer plane 21 correspondingly constitutes a load area
is formed. In addition, a mounting through hole 22 is bored in the center of the track 5 to fix the track 5 to a bed B of a mechanical device, etc., and a fixing bolt passes through the mounting through hole 22. The track base 5 is fixed to the bed B at 23.

In the linear sliding roller bearing of the present invention constructed as described above, as shown in FIG. , a rigid movable body A is constructed on the sliding base half 1 and the top plate 3, which constitute a bearing that slides along the track base 5, and is attached with mounting bolts 19, thereby allowing linear reciprocating motion of various mechanical devices. It is used by being incorporated into a linear sliding table that guides. At this time, in order to apply a predetermined preload to the bearing, one sliding table half 1 is pressed toward the track 5 side using the adjustment bolt 24 that enters from the movable body A side. The thin wall portion 16 of the plate 3 is elastically deformed between the sliding table halves 1, and the gap between the sliding table half 1 and the track base 5 is adjusted based on this elastic deformation according to the purpose of use. I can do it.

In the above embodiment, the thin wall portion 16 is formed in the center of the top plate 3 so that the top plate 3 is elastically deformed during preload adjustment, but the thin wall portion 16 is not necessarily limited to the thin wall portion 16. As shown in the second embodiment of FIG. 16, a similar effect can be obtained by forming a bent portion 25 in the center of the top plate 3 to control elastic deformation.

Further, in the above embodiment, the case where the roller 6 is a cylindrical roller has been described, but as shown in the third embodiment of FIG. 15, a spherical roller can be used instead of the cylindrical roller. In this case, the load groove 7 of the slide table half 1 and the transfer surface 21 of the track base 5 are each formed in an arc shape, and these arc-shaped load grooves 7
The radius of curvature of the transfer surface 21 is formed to be slightly larger than the radius of curvature of the spherical roller. By using the spherical rollers in this way, even if there is a slight bend in the track, it can be automatically adjusted, so that localized high loads can be avoided.

In the second and third embodiments, the other parts are the same as those in the first embodiment, so the same parts are given the same reference numerals and the explanation thereof is omitted.

[Effects of the Invention] As explained above, according to the linear sliding roller bearing of the present invention, a pair of sliding table halves each having a large number of rollers constituting the bearing, and an upper surface of these sliding table halves are provided. They are connected to each other to maintain a predetermined interval to form a recess into which the track base is to be fitted, as well as a top plate that can be elastically deformed between the two sliding base halves, making it difficult for the movable body to move. In addition to being easy to install, it is possible to adjust the preload to be applied or not to be applied depending on the application, and the degree of preload can also be easily adjusted. Moreover, since it is possible to incorporate a sliding table by utilizing the rigidity of the movable body, the top plate can be made thinner, which lowers the load application point when a horizontal load is applied to the movable body. , it is possible to improve stability, and furthermore, it has excellent effects such as being able to provide a bearing that can withstand higher loads than bearings using balls, so its utility value is remarkable.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the usage state of the first embodiment of the linear sliding roller bearing of the present invention, and the second Fig.
The figure is a front view of the linear sliding roller bearing of the present invention, Figure 3 is a side view of Figure 2, and Figure 4 is a side view of Figure 2.
FIG. 5 is a side view of the track with the roller guide removed in FIG. 2, FIG. 6 is a partially sectional bottom view of FIG. 2, and FIG. 8 is a cross-sectional view of FIG. 7, FIG. 9 is a front view of the lid according to the present invention, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a back view of FIG. 9. Figure 12 is a view along the X arrow in Figure 9;
13 is a view taken along the Y arrow in FIG. 9, FIG. 14 is a sectional view showing the second embodiment of the invention in a state of use, and FIG.
The figure is a sectional view showing a third embodiment of the present invention in use. Code explanation 1...Sliding table half, 1a...Horizontal part,
1b... hanging part, 2... roller guide, 3...
Top plate, 4... Concavity, 5... Track base, 6... Roller, 7... Load groove, 8... No load part, 12... Roller turning part, 13... Holding part, 16... Thin wall part , 21...Transfer surface, 25...Bending portion, A...Movable body.

Claims (1)

[Scope of Claims] 1. It has a horizontal part and a hanging part hanging down from one end thereof, and is formed in a substantially L-shape in longitudinal section, and has a wall in the axial direction on the bottom side of the tip of the horizontal part and on the inner side of the bottom end of the hanging part, respectively. A load groove with a transfer surface constituting a load area of the roller track is formed along the axial direction, and a load groove is formed along the axial direction on the upper surface side of the tip of the horizontal part and on the outer surface side of the lower end of the hanging part. between a pair of sliding platform halves in which non-load portions constituting a roller endless track are formed corresponding to the load grooves, and the upper surfaces of each of the sliding platform halves facing each other at a predetermined interval; At the same time, a top plate that can be elastically deformed between the pair of sliding table halves is attached to the top of the horizontal part and the lower end of the hanging part of each of the sliding table halves, and the load on the horizontal part and the hanging part is Two pairs of roller guides that cooperate with the grooves or the load grooves and the non-load portion to form a roller endless track, and the upper part thereof are placed in a predetermined position with respect to each other in a recess formed by both of the sliding table halves and the top plate. A track base that is fitted while maintaining an interval and has a transfer surface facing oppositely to the transfer surface of the load groove formed in the horizontal part and the hanging part of each sliding base half, and each of the sliding base halves. It is composed of a large number of rollers that circulate in each roller endless track formed on the horizontal part and the hanging part of the body, and apply a load between the slide table half side transfer surface and the track platform transfer surface, and When adjusting the preload when attached to a movable body that moves along the track, the top plate is elastically deformed.
A roller bearing for linear sliding, characterized in that the gap between the slide table half and the track base can be adjusted. 2. A linear sliding roller bearing according to claim 1, wherein a thin wall portion is formed in the center of the top plate to control elastic deformation. 3. A linear sliding roller bearing according to claim 1, wherein a bent portion for controlling elastic deformation is formed in the center of the top plate. 4. Each of the transfer surfaces formed on each half of the sliding table and the track is flat, and each roller circulating in the endless roller track is a cylindrical roller. The linear sliding roller bearing according to any one of Item 3. 5. Each of the transfer surfaces formed on each half of the sliding table and the track base is an arcuate surface, and each roller circulating in the endless roller track is a spherical roller. The linear sliding roller bearing according to any one of Item 3.