JPH0920162A - Seat slider - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of abnormal sound caused by the addition of surplus load to a motor, by simplifying the fixing part between the gear box and the upper rail of a seat slider, and reducing the number of parts such as a variety of bolts or calking pins, and facilitating the incorporation work, and improving dimensional accuracy. SOLUTION: An upper rail 5 is made of a body 5a and an upper vertical wall 5c made in longitudinal direction on the body 5a. A cut groove 13a is made at one end of the gear box 13 being the driving part of a seat slider. In condition that the upper vertical wall 5c is set in the cut groove 13a, the bear box 13 is pivoted by a pin 19 to the upper vertical wall 5c of an upper rail 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device suitable for supporting a seat body in a vehicle seat or the like so as to be movable and adjustable in the front-rear direction. A lower rail fixed on the surface and an upper rail slidably supported in the longitudinal direction on the lower rail and fixedly attached to the seat body side, the upper rail via a motor and a gear box. The present invention relates to a seat slide device which is guided and supported in the longitudinal direction on the lower rail by a screw shaft that is rotationally driven and a nut member that is screwed into the screw shaft and is rotationally driven relatively.

[0002]

2. Description of the Related Art Generally, a vehicle seat is provided with a seat cushion and a seat main body comprising a seat back and the like provided upright and rotatably adjustable behind the seat cushion. By supporting the vehicle on the floor of the vehicle body via a seat slide device, the vehicle can be slidably adjusted in the front-rear direction of the vehicle body, and can cope with the occupant's body type and preferences.

As shown in FIG. 9, a pair of left and right lower rails 2 of a conventional seat slide device 1 of this type are bent inward from a tip end side of a main body portion 2a having a substantially upward U-shape and both side portions 2b thereof. It also has a locking portion 3 that hangs downward. The front and rear ends of the lower rail 2 are the front and rear legs 4a,
It is fixed to the floor surface of the vehicle body via 4b.

The pair of left and right upper rails 5 of the seat slide device 1 are formed in a substantially inverted T shape so that they can be assembled by being mounted on the lower rails 2. From the front end side of the horizontal portion 5a of the upper rails 5. Both sides bent upward 5
The locked portion 7 is formed by b. This locked portion 7
Are engaged with the engaging portion 3 on the lower rail 2 side so as to be engageable with each other.

Further, the conventional inverted T-shaped vertical portion 5c of the upper rail 5 is integrally fixed by welding or the like with the two vertical portions having an L-shaped cross section facing each other. An anchor member of a seat belt, a shaft of a seat lifter, a base of a reclining mechanism, and the like are attached to a substantially inverted T-shaped vertical portion 5c of the upper rail 5. A roller 9a is inserted between the lower rail 2 and the upper rail 5, and a ball 9b is inserted between the locking portion 3 and the locked portion 7.

When the roller 9a and the ball 9b are interposed between the lower rail 2 and the upper rail 5 so as to be slidably supported, a conventional simple metal surface slides to obtain a sliding function. In comparison with the above, the slide resistance increases sharply due to bending and twisting of the rails 2 and 5 due to bending and mounting conditions, and malfunctions due to abnormal noise and fluctuations in the sliding resistance due to load during operation. This can prevent problems such as slipping.

Further, as shown in FIG. 8, the upper rail 5 is screw-rotated by a motor 11 and a gear box 13 having a reduction gear, and a screw shaft 15, which is screwed onto the screw shaft 15 and is relatively rotationally driven. It is guided and supported in the longitudinal direction on the lower rail 2 by the nut member 17 that is provided. The motor 11 and the gearbox 13 are fixed to a motor bracket 21 which is fixed to a vertical portion 5c of the upper rail 5 having a substantially inverted T shape by a plurality of bolts or caulking pins 19. A pair of left and right nut members 17 screwed with the pair of left and right screw shafts 15 are connected by a connecting member 23 so as to interlock with each other.

[0008]

However, in the conventional seat slide device 1, when the motor 11 and the gear box 13 are fixed to the substantially inverted T-shaped vertical portion 5c of the upper rail 5, a plurality of motor brackets 21 are provided. Must be fixed with the bolts or the crimping pins 19 of the above, and the brackets, the bolts or the crimping pins are required, the dimensional accuracy after assembling is required, and the number of parts increases and the assembling work becomes complicated. Was. Further, if the dimensional accuracy cannot be obtained, there is a possibility that an unreasonable force is applied to the reduction gear and the motor 11 to cause gear noise, or an extra load is applied to the motor to generate abnormal noise.

Further, since the pin shaft support structure in which the motor bracket 21 is fixed by a plurality of bolts or caulking pins 19 requires strength, the gear box 13 must be upsized or the shaft support diameter must be increased to deal with it. It has the drawback of increased weight and increased cost.

An object of the present invention is to simplify the fixing portion of the gearbox and the upper rail of the seat slide device, reduce the number of parts such as bolts or caulking pins, facilitate the assembling work and improve the dimensional accuracy. , A seat slide that is not likely to generate an abnormal noise due to an excessive load being applied to the motor, has excellent strength and slidability in the front-rear direction, is free from rattling, and is inexpensive in cost. A device is provided.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a seat slide device according to claim 1 of the present invention includes a lower rail fixed on a floor for seat placement. A screw shaft that is slidably supported in the longitudinal direction on the lower rail, and has an upper rail that is attached and fixed to the seat body side, the upper rail being rotationally driven via a motor and a gear box. A seat slide device that is guided and supported in the longitudinal direction on the lower rail by a nut member that is screwed into the screw shaft and is driven to rotate relative to the lower shaft, the lower rail having a body portion having a substantially upward U-shape; The upper rail has a locking portion formed on the front end side of both side portions thereof, and the upper rail is substantially lower than the lower rail so as to be assembled. A body portion having a square U-shape, an upper vertical wall portion formed along the longitudinal direction on the upper portion of the body portion, and an engaging portion on the lower rail side that is formed on the tip ends of both side portions of the body portion. The gearbox has an engaged portion that is in contact with the upper end of the gearbox, and a notch groove is formed at one end of the gearbox. It is characterized in that it is supported by a pin shaft on the upper vertical wall portion of.

According to the seat slide device of the first aspect of the present invention, the notch groove is formed at one end of the gear box, and the upper vertical wall portion of the upper rail is fitted in the notch groove, Since the gearbox is supported by the pin on the upper vertical wall of the upper rail, the rotation of the gearbox is prevented by fitting the notch groove of the gearbox and the upper vertical wall even if the pin shaft is supported at one point. Further, the load in the front-rear direction can be received by the contact surface between the gear box and the upper vertical wall portion of the upper rail, and the strength in the front-rear direction can be improved.

According to a second aspect of the present invention, there is provided a seat slide device, a lower rail fixed on a floor for seating, a longitudinally slidable support on the lower rail, and a seat. A screw shaft having an upper rail attached and fixed to the main body side, the upper rail being rotationally driven via a motor and a gear box; and a nut member screwed to the screw shaft and relatively rotationally driven. In the seat slide device guided and supported in the longitudinal direction on the lower rail by the, the lower rail, the main body portion having a substantially upward U-shape,
The upper rail has a locking portion formed on the tip ends of both side portions thereof, and the upper rail has a substantially downwardly U-shaped main body portion that is assembled by being attached to the lower rail, and an upper portion of the main body portion. An upper vertical wall portion formed along the longitudinal direction, and a locked portion which is formed on both end portions of both sides of the main body portion and which can be brought into contact with a locking portion on the lower rail side. A motor bracket is fixed to the upper vertical wall of the upper rail, and the gearbox is supported by the motor bracket at one point by a pin shaft support. It is characterized in that the contact surface is designed to receive a load.

According to the seat slide device of the second aspect of the present invention, the motor bracket is fixed to the upper vertical wall portion of the upper rail, and the gear box is supported by the motor bracket at one point by the pin shaft support. When the rail receives a load in the front-rear direction, the load is applied to the contact surface between the motor bracket and the gearbox, so the number of parts can be reduced, and even if it is a single point support, the gearbox The rotation of the motor can be prevented, and the load in the front-back direction can be received by the contact surface of the motor bracket and the gear box. The load is transmitted from the motor bracket to the upper rail, and the load is applied from the upper rail to the lower rail. It can be transmitted, and the strength in the front-back direction can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a seat slide device of the present invention will be described in detail with reference to the drawings. 1 (a), (b) and FIG. 2 respectively show an example of an embodiment of a seat slide device 1 according to the present invention, and in these figures, portions which are the same as or correspond to those in FIGS. 8 and 9 described above. Will be described with the same reference numerals.

Since the lower rail 2 and the upper rail 5 of the seat slide device 1 have the same construction as shown in FIGS. 8 and 9, the detailed description thereof will be omitted. ) And a seat ride device 1 shown in FIG. 2 show an embodiment in which a screw shaft 15 as a drive unit is incorporated, and a seat ride device 1 shown in FIGS. 3, 4 and 5 has a screw shaft 15 as a drive unit. 15 shows an embodiment in which 15 is placed outside.

The lower rail 2 has a main body portion 2a having a substantially upwardly U-shape, and a locking portion 3 which is bent inward from the front end sides of both side portions 2b and hangs downward. The upper rail 5 includes a main body portion 5a having a substantially downward U-shape that is attached to the lower rail 2 and assembled.
It has a locked portion 7 that is engaged with the locking portion 3 on the lower rail 2 side by being bent outward from the front ends of both side portions 5b.

An upper vertical wall portion 5c is integrally formed on the upper portion of the main body portion 5a of the upper rail 5 along the longitudinal direction,
An anchor member of a seat belt, a shaft of a seat lifter, a base of a reclining mechanism, and the like are attached to the upper vertical wall portion 5c.

Between the lower rail 2 and the upper rail 5, a holder 8 for holding the rollers 9a and the balls 9b is inserted as shown in FIG. 9, and the upper rail 5 slides on the lower rail 2 in the longitudinal direction. The guide is supported as much as possible.

The upper vertical wall portion 5c, the main body portion 5a and the locked portion 7 of the upper rail 5 of the seat slide device 1 can be formed by bending a single plate material. The upper rail 5 is not limited to the shape shown in the figure, and the locking portion 3 and the locked portion 7 may be configured to be opposite to each other.

A screw shaft 15 in which the upper rail 5 of the seat ride device 1 is rotationally driven through a motor 11 and a gear box 13 having a reduction gear, and a nut which is screwed into the screw shaft 15 and is relatively rotationally driven. It is guided and supported in the longitudinal direction on the lower rail 2 by the member 17.

In the embodiment shown in FIGS. 1 (a), 1 (b) and 2, a cutout groove 13a extending in the front-rear direction is formed at one end of the gear box 13, and the cutout groove 13a is formed in the upper vertical wall portion. The gearbox 13 is pivotally supported by the pin 19 on the upper vertical wall portion 5c of the upper rail 5 in a state of being fitted to the end portion of 5c.

Even when the gear box 13 is supported by the pin 19 at one point, the notch groove 13a of the gear box 13 is formed.
The rotation of the gear box 13 can be prevented by fitting the upper vertical wall portion 5c to the upper vertical wall portion 5c of the gear box 13 and the upper rail 5 and the main body portion 5a. It can be received at the contact surface, and the strength in the front-back direction can be improved.

Further, as shown in FIGS. 3, 4 and 5, the seat ride device 1 showing the embodiment in which the screw shaft 15 as the driving portion is placed outside is the upper vertical wall portion 5c of the upper rail 5. The motor bracket 21 is fixed to the pin 20 with a pin 20.

The motor bracket 21 has a pivotal support portion 21a having a U-shaped cross section and a bifurcated mounting portion 21b. The gearbox 13 is inserted into the pivotal support portion 21a of the motor bracket 21 having a U-shaped cross section. The bifurcated mounting portion 21b of the motor bracket 21 is fixed by the pin 20 while sandwiching the upper vertical wall portion 5c of the upper rail 5.

Therefore, the gear box 13 is pivotally supported by the motor bracket 21 by the pin 19 and is supported at one point, and when the upper rail 5 receives a load in the front-rear direction, the motor bracket 21 has a U-shaped cross section. Branch 2
A load can be received on the bottom surface of 1a and the contact surface of the gear box 13.

6 (a), 6 (b) and 6 (c) show different embodiments of the type in which the screw shaft 15 of the present invention is incorporated, and the parts corresponding to the above-mentioned embodiments are shown. Although the same reference numerals are given and further detailed description thereof is omitted, the notch groove 13a of the gear box 13 is formed to extend in the front-rear direction without penetrating in the vertical direction.

In FIG. 6 (c), reference numeral 25 is the motor 1.
1 is a worm gear connected to the output shaft, and 27 is a helical gear that meshes with the worm gear 25. The screw shaft 15 is connected to the helical gear 27, but the drive mechanism is not limited to that shown in the drawings. Absent.

According to this embodiment, the front load can be received by the plate thickness portion at the front end of the upper vertical wall portion 5c of the upper rail 5 and the gear box 13, and the rear load can be received by the upper rail 5. It can be received by the cross section of the front end of the upper vertical wall portion 5c and the gear box 13.

7 (a) and 7 (b) show different embodiments of the type in which the screw shaft 15 of the present invention is incorporated, and the portions corresponding to the above-mentioned embodiments are the same. Although the reference numerals are given and the detailed description thereof is omitted, the notch groove 13 is formed in the upper portion of the gear box 13.
The a is formed so as to extend in the front-rear direction while penetrating in the up-down direction.

According to this embodiment, the front and rear loads can be received by the cross section of the front end of the upper vertical wall portion 5c of the upper rail 5 and the gear box 13, and the gear box 13 is supported at one point. Therefore, it can be slightly rotated, and can be received by the wall of the cutout groove 13c even when a large load is applied, and the left and right nut members 17, 17 can be received.
Even if the vertical displacement occurs in the gearbox 13
By rotating a small amount, an extra load is not applied to the motor 11 even if an unreasonable force is applied to the reduction gear, and the generation of abnormal noise can be prevented.

The present invention is not limited to the structure of the above-described embodiment, and the shape, structure, etc. of each part of the seat slide device 1 can be appropriately modified or changed as necessary, and as described above. Various modifications can be considered, including the shape and material of each rail 2, 5.

[0033]

While the above is the configuration of the example of the embodiment of the present invention, according to the seat slide device of the first aspect of the present invention, the notch groove is formed at one end of the gear box,
Since the gear box is pin-supported by the upper vertical wall of the upper rail in a state where the upper vertical wall is fitted in the notch groove, the notch of the gear box is supported even if the pin axial support is in a single-point support state. By fitting the groove and the upper vertical wall portion, the rotation of the gearbox can be prevented, and the load load in the front-rear direction can be received by the contact surfaces of the gearbox and the upper vertical wall portion of the upper rail. The strength in the front-back direction can be improved.

According to the seat slide device of the second aspect of the present invention, the motor bracket is fixed to the upper vertical wall portion of the upper rail, and the gear box is supported by the motor bracket at one point by the pin shaft support. When the rail receives a load in the front-rear direction, the load is applied to the contact surface between the motor bracket and the gearbox, so the number of parts can be reduced, and even if it is a single point support, the gearbox The rotation of the motor can be prevented, and the load in the front-back direction can be received by the contact surface of the motor bracket and the gear box. The load is transmitted from the motor bracket to the upper rail, and the load is applied from the upper rail to the lower rail. It can be transmitted, and the strength in the front-back direction can be improved.

According to the seat slide device of the present invention, the fixing portion of the gearbox and the upper rail of the seat slide device is simplified, the number of parts such as bolts or caulking pins is reduced, and the assembling work is easy and the dimensional accuracy is improved. There is no risk of extra noise being applied to the motor, abnormal noise is generated, strength in the front-back direction and slidability are excellent, there is no risk of rattling, etc. The seat slide device that is

[Brief description of the drawings]

1A and 1B show an example of an embodiment of a drive unit built-in type of a seat slide device according to the present invention, in which FIG. 1A is a perspective view and FIG.

FIG. 2 is a side view showing an example of an embodiment of a seat slide device according to the present invention.

FIG. 3 is a perspective view showing an example of an embodiment of a drive unit external mounting type of the seat slide device according to the present invention.

FIG. 4 is an exploded perspective view of an essential part showing an example of an embodiment of a drive unit external mounting type of a seat slide device according to the present invention.

FIG. 5 is a side view showing an example of an embodiment of a drive unit external mounting type of the seat slide device according to the present invention.

6A and 6B are views showing a different embodiment of a drive unit built-in type of a seat slide device according to the present invention, in which FIG. 6A is an exploded perspective view of a main part, FIG. 6B is a side view, and FIG. Side view.

7A and 7B show different embodiments of a drive unit built-in type of a seat slide device according to the present invention, in which FIG. 7A is an exploded perspective view of essential parts, and FIG. 7B is a side view.

FIG. 8 is a perspective view for explaining a schematic configuration of a conventional seat slide device.

FIG. 9 is a cross-sectional view for explaining a schematic configuration of a conventional seat slide device.

[Explanation of symbols]

 1 Seat Slide Device 2 Lower Rail 2a Main Body 2b Both Sides 3 Locking Part 5 Upper Rail 5a Main Body 5b Both Sides 5c Upper Vertical Wall 7 Locked Part 8 Holding Tool 9a Roller 9b Ball 11 Electric Motor 13 Gear Box 13a Notch Groove 15 Screw shaft 17 Nut member 19 pin 20 pin 21 Motor bracket 21a Pivot part 21b Mounting part 25 Worm gear 27 Helical gear

Claims (2)

[Claims] 1. A lower rail fixed on a floor for seating, and an upper rail slidably supported in the longitudinal direction on the lower rail and attached and fixed to the seat body side. A seat slide in which the upper rail is longitudinally guided and supported on the lower rail by a screw shaft that is rotationally driven via a motor and a gearbox, and a nut member that is screwed onto the screw shaft and is relatively rotationally driven. In the device, the lower rail has a main body having a substantially upward U-shape, and locking portions formed on the tip ends of both side portions thereof, and the upper rail is attached to the lower rail so as to be assembled. A substantially downwardly U-shaped main body portion, an upper vertical wall portion formed in the upper portion of the main body portion along the longitudinal direction, and both end portions of the main body portion. And a locked portion that is engaged with the lower rail-side locking portion so as to be able to come into contact therewith, and a cutout groove is formed at one end of the gear box, and the upper vertical wall portion is formed in the cutout groove. A seat slide device, wherein the gear box is supported by a pin shaft on an upper vertical wall portion of an upper rail in a fitted state. 2. A lower rail fixed to a floor for seat mounting, and an upper rail slidably supported in the longitudinal direction on the lower rail and fixed to a seat body side. A seat slide in which the upper rail is longitudinally guided and supported on the lower rail by a screw shaft that is rotationally driven via a motor and a gearbox, and a nut member that is screwed onto the screw shaft and is relatively rotationally driven. In the device, the lower rail has a main body having a substantially upward U-shape, and locking portions formed on the tip ends of both side portions thereof, and the upper rail is attached to the lower rail so as to be assembled. A substantially downwardly U-shaped main body portion, an upper vertical wall portion formed in the upper portion of the main body portion along the longitudinal direction, and both end portions of the main body portion. And a locked portion that is formed so as to be able to come into contact with the locking portion on the lower rail side, the motor bracket is fixed to the upper vertical wall portion of the upper rail, and the gearbox is attached to the motor bracket. A seat slide device, wherein the seat rail is supported by a pin shaft at one point, and when the upper rail receives a load in the front-rear direction, the load is applied to the contact surface between the motor bracket and the gear box.