JPH09273616A - Power slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate problems that the number of parts is large, assembly is complicated and difficult, and the cost is high because an exclusive nut to which cutting work is applied is used for a feed screw shaft of a power slide device. SOLUTION: Torque to be generated by the output of a geared motor 18 provided on a slide rail device is transmitted to a feed screw shaft 3 arrange on the slide rail device, a nut member 2 constituted by alternately projection molding driving holes 2a, 2a and fitting pieces 2b, 2b between the driving holes 2a, 2a outward into an arc shape between bracket parts 1a, 1b provided on both ends of a plate material is fitted to a trapezoidal thread part or a square thread part of the feed screw shaft 3, and a seat of the slide rail device is longitudinally moved by propulsion power of the nut member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits the rotational force of a geared motor arranged on an upper rail or a lower rail to a feed screw shaft having a trapezoidal screw or a square screw portion arranged on a lower rail or an upper rail, and further feed screw. The present invention relates to a power slide device in which a nut is fitted to a trapezoidal screw or a square screw part of a shaft so that a propulsive force is applied by the feed screw shaft to slide a seat in a front-back direction.

[0002]

2. Description of the Related Art An upper rail that slides on a lower rail is a dedicated nut that is fitted to the trapezoidal screw or square screw portion of a feed screw shaft having a trapezoidal screw or square screw portion that transmits a rotational force by the output of a geared motor. Is held by a holder attached to the bracket on the lower rail or upper rail side, the output of the geared motor is transmitted to the feed screw shaft, and the rotation of this feed screw shaft moves the bracket through the dedicated nut. It is known and used.

[0003]

The dedicated nut must be cut, and further, the number of parts is large.
Assembly is complicated and difficult, and there are drawbacks such as high cost.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in view of the above problems, and is a nut to be fitted to a trapezoidal screw or a square screw portion of a feed screw shaft of a power slide device. The member is made of sheet metal by plate processing to secure the fitting with the trapezoidal screw or the square screw, and
The present invention provides a power slide device aiming at reduction of parts and simplification of assembly.

[0005]

1 shows the most preferred embodiment of a power slide device according to the present invention. FIG.
In the basic form of the nut used in the power slide device, a gap (a trapezoidal screw or a square screw portion 3 provided on the feed screw shaft 3 described later) is provided between the bracket portions 1a and 1b at both ends in the longitudinal direction of the plate material 1.
and a driving hole 2a, 2a with a space for fitting with a),
Fitting pieces 2b, 2b are provided between the driving holes 2a, 2a, and the fitting pieces 2b, 2b are alternately punched outward in an arc shape to form a trapezoidal screw of the feed screw shaft 3 or a groove of the square screw portion 3a. The nut member 2 having the bracket portions 1a and 1a is formed so as to be fitted therein, and is configured.

3 to 5 show one embodiment of the power slide device, and the lower rail 11 and the upper rail 12 constitute the slide device. That is, the lower rail 11 formed by bending the upper end of the U-shaped member outwardly is formed on the lower rail 11, and the upper rail 12 formed by bending the lower end of the U-shape formed inwardly is formed by inserting the steel ball 13 between the bent pieces. Slidingly fits.

Further, leg pieces 14, 14 for fixing to the floor surface are provided at both ends of the lower rail 11, and the lower rail 11 is fixed to the floor surface.

Further, one of the brackets 1a of the nut member 2 is attached to a part of an intermediate portion of the lower surface of the lower rail 11 by a mounting tool 15 such as a rivet, and the nut members 2 are alternately punched into fitting pieces. 2b, 2b are fitted into the groove of the trapezoidal screw or the square screw portion 3a of the feed screw shaft 3 which is rotatably supported by the bearings 17 at both ends of the mounting bracket 16 on the upper surface of the upper rail 12, and the feed screw shaft 3 is attached to the mounting bracket. 16 is connected to the motor 18 attached to the gear box 19 and the motor 18 drives the feed screw shaft 3 to rotate,
The rotation of the feed screw shaft 3 causes the seat on the upper rail 12 to slide back and forth along the lower rail 11 via the nut member 2 fixed to the lower rail 11.

[0009]

As described above, according to the present invention, a nut member formed by alternately punching and forming fitting pieces by sheet metal working of a plate material is provided on a part of the slide rail, and the nut members are alternately punched and fitted. By fitting the piece into the groove of the trapezoidal screw or the square screw portion of the feed screw shaft, the feed screw shaft rotating by the output of the geared motor gives the slide rail forward and backward movement through the nut member. Therefore, in the fitted state of the trapezoidal screw or the square threaded portion of the feed screw shaft and the nut member, the fitting pieces are alternately fitted into the groove, so that the engagement is ensured. Further, the number of parts can be reduced and the assembling can be facilitated. Therefore, the cost is reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a basic nut used in a power slide device of the present invention.

FIG. 2 is a front view of the nut member of FIG. 1 fitted to a trapezoidal screw portion or a square screw portion of a feed screw shaft.

FIG. 3 is a side view of the power slide device.

FIG. 4 is a perspective view of FIG. 3;

5 is a cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 plate material 1a, 1a bracket part 2 nut member 2a driving hole 2b fitting piece 3 feed screw shaft 3a trapezoidal screw or square screw part 11 lower rail 12 upper rail 13 steel ball 14 leg piece 15 mounting tool 17 mounting bracket 17 bearing 18 motor 19 Gear box

Claims (1)

[Claims] 1. A feed screw shaft arranged on a lower rail or an upper rail, which transmits a rotational force at an output of a geared motor arranged on an upper rail or a lower rail to a feed screw shaft having a trapezoidal screw or a square screw portion. In the power slide device configured to move the seat in the front-rear direction by operating the nut fitted to the plate, the nut member fitted to the trapezoidal screw or the square screw portion of the feed screw shaft is made of the plate material. A power slide device characterized by being formed by a member made by sheet metal processing.