JPH0428836Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic seat sliding mechanism mainly applied to automobile seats.

[Conventional technology]

Conventionally, as shown in FIG. 6, an upper surface roller 4 is rotatably mounted between a lower rail 1 and an upper rail 2, a fixing member 3 through which a screw shaft 5 passes is interposed, and the upper rail 2 is attached to the fixing member 3. A configuration is provided that automatically slides on the roller 4 of the
No. 47225).

[Problem that the invention attempts to solve]

However, in the conventional technology described above, the diameter of the roller is small, so the rotational resistance of the roller is large, a large load is applied to the screw shaft, and noise is generated when the roller rotates.

[Means for solving problems]

The present invention, as a means to solve the above conventional problems, includes a block-shaped shaft frame 14, a pair of left and right rollers 17, 17 rotatably mounted on both sides of the shaft frame 14, and The rolling tool 13 is attached to the lower rail 11 and consists of a support frame 19 having projection holes 21 for the rollers 17, 17 on the upper surface and ball bearing support grooves 23, 23 on the side surfaces.
A plurality of pieces are interposed between the upper rail 12 and the upper rail 12,
The rollers 17, 17 of the rolling tool 13 are disposed between the lower rail bottom surface 11A and the upper rail lower surface 12A, the ball bearing is disposed between the lower rail outer surface 11B and the upper rail inner surface 12B, and the ball bearing is disposed between the lower rail outer surface 11B and the upper rail inner surface 12B. A propelling body 32 is attached to the lower surface, into which a screw rod 24 driven by a drive source is screwed, and the screw rod 24 provides an automatic sliding mechanism for the sheet loosely inserted into the shaft frame 14. It is.

[Effect]

Since the shaft frame 14 is block-shaped, the screw rod 24 can be passed through it freely, and the screw rod 2
4 can therefore be installed within the slide mechanism. When the screw rod 24 is rotated in forward and reverse directions by a driving source, the upper rail 12 rides on the rollers 17 of the rolling tool 13 and automatically slides back and forth with respect to the lower rail 11 via the propelling body 32. As the upper rail 12 slides, the roller 17 rolls between the lower rail 11 and the upper rail 12. And the rolling tool 13
The ball bearing 25 is also supported by the support frame 19 and rolls between the outer surface of the lower rail 11 and the inner surface of the upper rail 12.
2 to prevent sideways wobbling relative to the lower rail 11.

[Effect of idea]

Therefore, in the present invention, since the screw rod for automatic sliding can be installed inside the slide mechanism, the structure is compact and the diameter of the roller of the rolling element is large (the width of the gap between the bottom surface of the lower rail and the bottom surface of the upper rail is Since the rotational friction of the rollers is small and the load on the screw rod is greatly reduced, the upper rail can automatically slide back and forth smoothly while being prevented from wobbling sideways by the ball bearings.

〔Example〕

To explain the present invention with reference to an embodiment shown in FIGS. 1 to 5, reference numeral 13 is a rolling tool, which is spherical and has shafts 15 on both sides, and a screw rod through hole 1 in the center.
6, and a pair of left and right rollers 17, 1 that are rotatably attached to both sides of the shaft frame 14 and have shaft holes 18 into which the shaft 15 of the shaft frame 14 fits.
7, and a support frame 19 which is attached to the shaft frame 14 and has an exit hole 21 for the rollers 17, 17 on the upper surface 20 and a ball support groove 23 on the side surface 22.

Two or more rolling tools 13 are interposed between the lower rail 11 and the upper rail 12, as shown in FIGS. 2 and 3. In this state, the screw rod 24 for sliding the upper rail 12 back and forth is loosely inserted into the screw rod through hole 16 of the support frame 19 of the rolling tool 13, and the rollers 17, 17 of the rolling tool 13 are connected to the lower rail. 11 rests on the bottom surface 11A and supports the lower surface 12A of the upper rail 12. and the rolling tool 1
The ball 2 is placed in the ball support groove 23 of the support frame 19 of No. 3.
5 and 25 are supported, respectively, and the balls 25 and 25 are spanned between the outer surface 11B of the lower rail 11 and the inner surface 12B of the upper rail 12. One end of the screw rod 24 is housed in a gear box 30, and within the gear box 30, as shown in FIG.
is attached to the spur gear 24A, and a worm gear 3 attached to the rotating shaft 31A of the motor 31 is attached to the spur gear 24A.
1B is engaged. Furthermore, as shown in FIG. 3, a propelling body 32 is attached to the lower surface of the intermediate portion of the upper rail 12, and the propelling body 32 has a threaded hole 32A extending therethrough into which the screw rod 24 is screwed.

In the above configuration, when the motor 31 is driven to rotate the worm gear 31B in a predetermined direction via the rotating shaft 31A, the screw rod 24 rotates via the spur gear 24A meshing with the worm gear 31B. Through the rotation of the screw rod 24, the screw hole 32A is screwed into the screw rod 24.
The propelling body 32 having a
The upper rail 1 moves forward or backward.
2 slides forward or backward. At this time, the upper rail 12 slides back and forth on the rollers 17, 17 of the rolling tool 13 interposed between it and the lower rail 11. As the upper rail 12 slides, the rollers 17, 17
2 and the lower rail 11, and the balls 25, 25 of the rolling tool 13 are also supported by the support frame 19 and roll between the outer surface 12B of the lower rail 12 and the inner surface 12B of the upper rail 12. As a result, the upper rail 12 slides smoothly on the lower rail 11, and the seat mounted on the upper rail 12 automatically slides. The load applied to the middle of the upper rail 12 is received by the screw rod 24 via the propelling body 32.

[Brief explanation of drawings]

Figures 1 to 5 show one embodiment of the present invention, in which Figure 1 is an exploded perspective view of a rolling tool, Figure 2 is a front sectional view, Figure 3 is a side sectional view, and Figure 4 is a side sectional view. The figure is a partially omitted perspective view of the gearbox, Figure 5 is a perspective view, and Figure 6 is a perspective view.
The figure is a partially cutaway perspective view of a conventional example. In the diagram, 11...Lower rail, 12...Upper rail, 11A...Lower rail bottom, 11B
...Outer surface of lower rail, 12A...Bottom surface of upper rail, 12B...Inner surface of upper rail, 1
3...Rolling tool, 14...Shaft frame, 17...Roller, 19...Support frame, 21...Extrusion hole, 23...
Support groove, 25... ball.

Claims (1)

[Scope of utility model registration request] It has a block-shaped shaft frame, a pair of left and right rollers rotatably attached to both sides of the shaft frame, and an exit hole for the rollers on the upper surface of the shaft frame,
A plurality of rolling tools each consisting of a support frame having a ball bearing support groove on the side surface are interposed between the lower rail and the upper rail, and the rollers of the rolling tool are inserted between the bottom surface of the lower rail and the bottom surface of the upper rail, The bearing is interposed between the outer surface of the lower rail and the inner surface of the upper rail, and a propeller is attached to the intermediate lower surface of the upper rail, into which a screw rod driven by a drive source is screwed, and the screw rod is connected to the shaft. An automatic seat sliding mechanism characterized by a loose hole in the frame.