JPH0630545Y2 - Power seat slide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a vehicle body side rail fixed to a vehicle body side, and a vehicle body side rail that is relatively movably fitted and supports a seat. And a rail on the side of the vehicle, the rail on the side of the seat being moved by power with respect to the rail on the side of the vehicle body.

<< Prior Art >> In recent years, a power seat slide device for moving a seat by power has been proposed.

As a conventional power seat slide device, for example, as shown in FIGS. 8 to 12, a pair of rail units 1 arranged in parallel corresponding to the width of the seat is provided,
The rail unit 1 is formed by slidably attaching a seat side rail 3 to a vehicle body side rail 2. A gear box 4 is fixedly provided on the front side of the seat-side rail 3, and an input shaft side of the gear box 4 is connected to a drive rotary shaft of a motor 5 and an output shaft side of the gear box 4 is connected. The front end portion of the screw shaft 6 is connected to.

In addition, a nut member 8 is fixed to an intermediate portion of the rail 2 on the vehicle body side via a bracket 7, and a bracket 1 having an insertion hole 10 formed at a rear end portion of the rail 3 on the seat side.
1 is attached.

The screw shaft 6 is screwed into the nut member 8, and the shaft portion 12 at the rear end of the screw shaft 6 is inserted into the insertion hole portion 10 of the bracket 11 to prevent the screw shaft 6 from swinging. It has been subjected.

Further, as a conventional power seat slide device, there is one disclosed in Japanese Patent Laid-Open No. 63-38048, and the rear end of the screw shaft in this power seat slide device has a notch at the rear end of the rail on the seat side. Was provided, the support member was inserted into this notch, the support member was fixed to the rail on the seat side, and the shaft portion at the rear end of the screw shaft was directly inserted into the bearing hole of this support member. .

<< Problems to be Solved by the Invention >> However, in the power seat slide device shown in FIG. 8, the shaft portion 12 at the rear end portion of the screw shaft 6 is merely inserted into the insertion hole portion 10 of the bracket 11. Therefore, when a peeling load F _{1 in a} direction of peeling the seat-side rail 3 from the vehicle-body-side rail 2 is applied due to a collision or the like, the rear portion of the seat-side rail 3 warps upward as shown in FIG. The screw shaft 6
There is a problem in that the shaft portion 12 of the screw shaft 6 comes off the insertion hole portion 10 of the bracket 11 and the screw shaft 6 does not serve as a strength member.

Further, in the power seat slide device disclosed in Japanese Patent Laid-Open No. 63-38048, since the supporting member is not configured to firmly support the screw shaft, a peeling load is applied to the rail on the seat side similarly to the above. If it is added, there is a problem that the rear part of the seat side rail warps upward and this rail peels off from the car body side rail, and the shaft part at the rear end of the screw shaft has a bearing hole for the support member. Since it was directly inserted into the screw shaft, the rotation of the screw shaft was not smooth.

The present invention has been made in view of the above problems and drawbacks, and its purpose is to apply a peeling load in a direction of peeling a seat side rail from a vehicle body side rail due to a collision or the like. It is an object of the present invention to provide a power seat slide device in which the screw shaft serves as a strength member to prevent the rear portion of the rail on the seat side from being deformed or peeled off, and which further smoothes the rotation of the screw shaft.

<Means for Solving the Problem> In order to achieve the above object, the present invention has a rail on the vehicle body side and a rail on the seat side that is fitted relatively movably to the rail on the vehicle body side, A nut member that is rotatably provided in the rail on the seat side so as to be rotatable in a rail space formed by the rail on the seat side and the rail on the vehicle body side, and is screwed to the screw shaft on the rail on the vehicle body side. In the power seat slide device provided with, a screw shaft pivot bracket is fixed together with the seat belt anchor bracket at the rear end of the seat side rail, and a bearing shaft is formed at the rear of the screw shaft. The shaft part penetrates the screw pivot support bracket and projects backward,
A stopper member is attached to the protruding portion.

<Operation> When a peeling load is applied in the direction of peeling the seat side rail from the vehicle body side rail due to a collision, etc., the screw shaft is firmly connected to the screw shaft pivot bracket by the stopper member, and this screw shaft is seated side. Connected to the rail of
The screw shaft serves as a strength member to prevent deformation and peeling of the rear portion of the seat side rail.

<< Embodiment >> An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

Each drawing shows an embodiment of the present invention.

As shown in FIGS. 1 and 2, the power seat slide device has rail units 20 and 20 corresponding to the width of the seat A.
Are arranged in parallel with each other, and an electric motor 15 as a drive source is fixedly installed on a rail 40 on one seat side forming both rail units 20, 20. Both rail units 20,
A seat frame (not shown) for supporting the seat A is provided between the rail units 20 while keeping the rail units 20, 20 at a predetermined interval. Since the rail units 20 and 20 have the same symmetrical structure, only one of them will be described below and the other will be omitted.

The rail unit 20 is a rail on the vehicle body side (lower rail).
30 and a rail (upper rail) 40 on the seat side supporting the seat A are movably fitted to each other.

The rail 30 on the vehicle body side constitutes the lower part of the rail unit 20, and the side walls 32, 32 rise from the mounting face plate 31, and the fitting flanges 33, 33 are bent at the ends of the side walls 32, 32 so as to face downward. The mounting legs 34a and 34b are fixed to both ends of the mounting face plate 31.

Further, the rail 3 on the vehicle body side is positioned so as to be positioned in the rail space between the rail 30 on the vehicle body side and the rail 40 on the seat side.
The nut member 36 is mounted in the groove formed by the mounting face plate 31 and the side walls 32, 32 of 0 through the holding member 35.
It is fixed.

The rail 40 on the seat side includes a horizontal main plate 41 to a side wall 42,
42 stands down with a wider width than between the tips of the fitting flanges 33, 33 of the rail 30 on the vehicle body side, and the holding flanges 43, 43 are bent toward the inside and upward at the tip thereof.

A resin slider is interposed between the fitting flange 33 of the rail 30 on the vehicle body side and the holding flange 43 of the rail 40 on the seat side, whereby the rail 30 on the vehicle body side and the rail 40 on the seat side slide. It is fitted so that it moves and is relatively movable.

At the front end of the main surface plate 41 of the seat-side rail 40, a screw shaft pivot bracket 44, which is a pivot member, is attached to the rivet 4.
A screw shaft pivot bracket 45, which is a pivot member, is fastened to the rear end of the main face plate 4 together with a seat belt anchor bracket 52 by rivets 45a.

The front and rear screw pivot support brackets 44,
45, bearing units 37, 3 facing each other
8 is attached by attaching bolts 37b and 38b.

A screw shaft 46 is housed in the rail space between the vehicle body side rail 30 and the seat side rail 40, and the nut member 36 is screwed into the screw shaft 46.
No screws are formed at the front and rear ends of the screw shaft 46, and the bearing shaft parts 46a and 46b having small diameters are provided. A worm wheel 39 is formed in the middle of the front support shaft portion 46a. This front bearing shaft 4
The front side of 6a is rotatably held by the bearing 37a of the bearing unit 37 on the front side. Further, the rear support shaft portion 46b of the screw shaft 46 is rotatably held by the bearing 38a of the rear side bearing unit 38, and the support shaft portion 46b is the bearing 38a.
And the screw pivot bracket 45
A washer 50 is fitted to a screw portion 49 at the rear end of the bearing shaft portion 46b, and a nut 51 is screwed to the screw portion 49. Stopper member B for preventing the screw shaft 46b from coming off
Are configured.

A worm 17 is attached to the rotary drive shaft 16 of the electric motor 15.
The worm 17 is formed on the screw shaft 46.
It meshes with the worm wheel 39.

Next, the operation will be described.

When the electric motor 15 is stopped, the worm wheel 39 is constrained by the worm 17 and cannot rotate. Therefore, the screw shaft 46 does not rotate, and the rail 30 on the vehicle body side and the rail 40 on the seat side are mutually displaced. Seat A is restrained from moving and seat A does not move.

When the electric motor 15 is started, the worm 17 is rotated by the rotary drive shaft 16, which causes the worm wheel 39 to rotate at a large reduction ratio and the screw shaft 46 to rotate.

Therefore, the screw shaft 46 moves relatively to the screwed nut member 36, and as a result, the seat-side rail 40 moves and the seat A supported by the seat-side rail 40 moves. It moves forward or backward depending on the direction of rotation of the electric motor 15.

If the electric motor 15 is stopped at a desired portion, the seat side rail 40 is restrained at that position as described above.

When a sudden load is not applied to the seat-side rail 40, the seat-side rail 40 does not deform as shown in FIG.

However, as shown in FIG. 6, when a peeling load F _{1 in a} direction of peeling the seat side rail 40 from the vehicle body side rail 30 is applied by a seat belt (not shown) through a seat belt anchor bracket 52 due to a collision or the like, The rear portion of the seat-side rail 40 is deformed so as to warp upward, but as described above, the support shaft portion 46a on the rear side of the screw shaft 46 is deformed.
Is connected to the rear end of the seat-side rail 40 via the bearing unit 38 and the screw shaft pivot support bracket 45, the screw shaft 46 serves as a strength member and serves as a rear member of the seat-side rail 40. There is no deformation, and a nut 51 is screwed on the rear end portion of the bearing shaft portion 46a to prevent the bearing shaft portion 46a from coming off. It does not easily come off from the pivot bracket 45 and has a large resistance to peeling.

<Effects of the Invention> As described above, the present invention has a rail on the vehicle body side and a rail on the seat side that movably fits to the rail on the vehicle body side. , A power seat slide in which a screw shaft is rotatably provided in a rail space formed by the seat side rail and the vehicle body side rail, and a nut member that is screwed onto the screw shaft is provided on the vehicle body side rail. In the device, the screw shaft pivot bracket is fixed together with the seat belt anchor bracket at the rear end of the seat side rail, and the bearing shaft is formed at the rear of the screw shaft. Since the support bracket is pierced and projected rearward, and the stopper member is attached to this protruding portion, the screw shaft is located near the anchor portion of the seat belt. It will be supported by the rails on the seat side. As a result, if a peeling load is applied to the seat belt in the direction of peeling the seat side rail from the vehicle body side rail via the seat belt anchor bracket due to a vehicle collision or the like, the rear portion of the seat side rail warps upward. However, the screw shaft is firmly connected to the screw shaft pivot bracket by the stopper member, and this screw shaft is connected to the seat side rail, so that the screw shaft becomes the strength member and the seat side. The rear portion of the rail is prevented from being deformed or peeled off.

The fact that the rear portion of the rail on the seat side is not deformed or peeled off has a great effect on safety in that the passenger can be reliably captured by the seat belt.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle seat to which a power seat slide device according to an embodiment of the present invention is applied, FIG. 2 is a perspective view of a power seat slide device according to an embodiment of the present invention, and FIG. FIG. 4 is an exploded perspective view, FIG. 4 is a vertical cross-sectional view of the rear portion of the screw shaft attached to a seat-side rail, and FIG. 5 is an unloaded seat-side rail in a power seat slide device according to an embodiment of the present invention. 6 is an explanatory view when the rail on the same seat side is loaded, and FIG. 7 is a schematic view of the action of this rail and the screw shaft when the rail on the same seat side is loaded,
FIG. 8 is a plan view of a conventional power seat slide device with a part thereof omitted, and FIG. 9 is a sectional view taken along line IX-IX in FIG.
0 is a sectional view taken along line XX in FIG. 8, and FIG. 11 is FIG.
FIG. 12 is a cross-sectional view taken along the line XI-XI, and FIG. 12 is an explanatory diagram showing the behavior of the conventional rail seat on the seat side when a load is applied. 30 ... Rails on the vehicle body side, 37, 38 ... Bearing units, 40 ... Rails on the seat side, 44, 45 ... Screw shaft pivot brackets, 46 ... Screw shafts. 52 …… Seat belt anchor bracket

Claims (1)

[Scope of utility model registration request] 1. A rail on the vehicle body side, and a rail on the seat side which is movably fitted to the rail on the vehicle body side, wherein the rail on the seat side and the rail on the vehicle body side are attached to the rail on the seat side. In a power seat slide device in which a screw shaft is rotatably provided in a rail space formed by rails and a nut member that is screwed onto the screw shaft is provided on a vehicle body side rail, a rear end of a seat side rail The screw shaft pivot bracket is fastened together with the seat belt anchor bracket, and a bearing shaft is formed at the rear of the screw shaft.The bearing shaft penetrates the screw pivot bracket and projects backward. A power seat slide device characterized in that a stopper member is attached to the protruding portion.