JP2533507Y2 - Seat slide device - Google Patents

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 used for automatically operating a seat of an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, as the above-mentioned seat slide device, there has been one shown in FIGS.

That is, a seat slide device 1 shown in the drawing
00 is lower rails 101 and 102 fixed to the vehicle body B.
In FIG. 3, upper rails 103 and 104 are slidably attached to the right and left sides, and the upper rails 103 and 104 are fixed to the seat S.

[0004] Further, female nuts 105 are provided on the nut fixing protrusions 101a, 102a provided substantially at the center of each of the lower rails 101, 102 from right to left in FIG.
a and 106a are fixed respectively, and nut members 105 and 106 are respectively fixed.
Bearings 103a and 104a provided near the left end in FIG. 3 and bearings 1 provided in gear cases 107 and 107 provided near the right end in FIG. 3 of upper rails 103 and 104, respectively.
07a, 107a support rotatably lead screws 109, 109 along the length direction of the upper rails 103, 104.

[0005] Each of the lead screws 109, 10
9, helical gears 111a, 111a constituting a part of the speed reduction mechanism 111 are fixed to a gear fixing portion 109b with a flat portion 109a formed near the right end.

[0006] Both ends of the screw portion 109c of the lead screw 109 are provided with external threads 109d, 109d.
A stopper plate fixing nut 114 is screwed into each of the male screws 109d, 109d via a stopper plate 112 and a washer 113, and each stopper plate 112, 112 is connected to the lead screw 109d.
Are located at both ends.

Further, the helical gear 111a has a worm 1 constituting the remaining part of the speed reduction mechanism 111.
11b is rotatably supported by the gear case 107, and a worm shaft 111b1 of the worm 111b is provided with a motor shaft (not shown) provided in the motor 115 by the flexible shaft 11 shown in FIG.
6.

Further, a motor 115 is mounted near the end of the rear upper rail 104 on the rear side in FIG. 4, and a motor shaft provided for the motor 115 is provided on each of the upper rails 103, 104.
In 07, it is connected to the worm 111b.

Therefore, when the switch is switched to the sheet advancing side in a state where the power is connected to the motor 115 via a switch (not shown), the power on the positive side is supplied to the motor 115 and the motor shaft of the motor 115 moves in the forward direction. Side, the worm 111b rotates clockwise in FIG.

Since the worm 111b rotates clockwise in FIG. 3, the helical gear 111a is rotated in the forward direction, and the lead screw 109 is rotated in the forward direction.

Since the lead screw 109 rotates in the forward direction, the screw portion 109c of the lead screw 109
Are the internal threads 105a, 106 of the nut members 105, 106.
3, the upper rails 102, 103 are moved to the right (forward) in FIG.
Since the sheet S is moved until it comes into contact with the nut members 105 and 106, the sheet S is moved forward.

When the switch is switched to the sheet retreating side, the power on the opposite side is supplied to the motor 115, and the motor 1
Since the 15 motor shafts rotate in the opposite direction, the worm 111b rotates counterclockwise in FIG.

Since the worm 111b rotates counterclockwise in FIG. 3, the helical gear 111a rotates in the opposite direction, and the lead screw 109 rotates in the opposite direction.

Since the lead screw 109 rotates in the opposite direction, the screw portion 109c of the lead screw 109
Are the internal threads 105a, 106 of the nut members 105, 106.
The upper rails 102, 103 are moved to the left (retreating side) in FIG.
Since the sheet 13 is moved until it comes into contact with the nut members 105 and 106, the sheet S is moved backward.

[0015]

However, in the above-mentioned conventional seat slide device 100, male screws 109d and 109d are provided at both ends of the screw portion 109c of the lead screw 109.
109d are formed respectively, and each male screw 109d, 10d
9d, the nut 114 for fixing the stopper plate is screwed via the stopper plate 112 and the washer 113.
09c and the male screw 109d, the man-hour for forming each of the external threads 109d is increased, and the nut 1 for fixing the stopper plate is increased.
There is a problem that it is difficult to improve the productivity due to an increase in the number of steps for screwing the 14, and it has been a problem to solve these problems.

[0016]

SUMMARY OF THE INVENTION A seat slide device according to the present invention includes a lower rail fixed to a vehicle body, an upper rail fixedly engaged with and supported by the lower rail, and a lower rail or an upper rail. Supported by either one of the above, a forward and reverse rotatable sheet motor, rotated by the forward and reverse rotation of the sheet motor, and a lead screw formed with a male thread portion, fixed to one of the upper rail or the lower rail,
Further, a female screw portion meshed with the male screw portion of the lead screw is formed, a seat slide device including a nut member that moves on the lead screw by rotating the lead screw and moves the upper rail back and forth with respect to the lower rail. A groove is formed at each of the two ends of the lead screw, and a thickness slightly smaller than the groove of the lead screw is formed at each of the two ends of the lead screw. Locked washer, and a plate member arranged on a lead screw between the nut member and the washer, and abutted against the washer, molded with a material that absorbs impact, and formed with a nut member. It is arranged between the plate member and is in contact with the plate member,
And a damper which can be brought into contact with the nut member, and a convex portion which is formed of a member having a substantially dish-shaped cross section and having an annular elasticity, and which is elastically locked to the lead screw on the inner peripheral portion. And a pressing washer having an outer peripheral portion and a contact portion for elastically pressing the locking washer.

[0017]

In the seat slide device according to the present invention, the thrust of the nut member is first received by the presser washer, and then the nut member comes into contact with the leading end of the lead screw in the groove of the lead screw. Receive thrust.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat slide device according to an embodiment of the present invention will be described below with reference to FIGS.

That is, the illustrated sheet slide device 1
In FIG. 1, upper rails 4 and 5 are slidably mounted on the lower rails 2 and 3 which are fixed to the vehicle body B while being spaced apart from each other. S is fixed.

The nut fixing projections 2a, 3a provided substantially at the centers of the lower rails 2, 3 have nut members 6, 7 formed with female threads 6a, 7a from right to left in FIG. Are fixed respectively, and each upper rail 4,5
In FIG. 1, bearings 4a and 5a provided near the left end and upper rails 4 and 5 are provided with bearings 8a and 8a provided in gear cases 8 and 8 provided near the right end in FIG. Lead screw 9 along the direction,
9 is rotatably supported.

A helical gear 10a constituting a part of the speed reduction mechanism 10 is fixed to a gear fixing portion 9b with a flat portion 9a formed near the upper end of each lead screw 9 in FIG.

At both ends of the male screw portion 9c formed on the lead screw 9, small-diameter end shafts 9d having outer diameters smaller than the outer diameter of the male screw portion 9c are provided, respectively. A groove 9d for locking a locking washer 11 described below in an annular shape is provided near the male screw portion 9c of 9d.
1 is provided, and a portion from the groove 9d1 of the small-diameter end shaft 9d toward the leading end is a fitting portion 9d2 for fitting a presser washer 12 described later.

Further, a stopper plate 13, a locking washer 11, and a presser washer 12 are attached to the small diameter end shaft 9d.

The stopper plate 13 has an end shaft insertion hole 13a having an inner diameter slightly larger than the outer diameter of the small-diameter end shaft 9d at substantially the center, and has a circular plate shape. Male screw 9 of the lead screw 9
Damper 13b made of resin on the c side for absorbing shock
Is provided, and a rigid plate portion 13c is provided on the tip end side of the lead screw 9, and the edge 9c of the male screw portion 9c is provided.
It has a thickness dimension substantially equal to the length dimension from c1 to the groove 9d1.

The locking washer 11 has an E-ring shape having a thickness slightly smaller than the width of the groove 9d1 of the lead screw 9 and an inner diameter slightly smaller than the outer diameter of the groove 9d1. belongs to.

The presser washer 12 has an outer diameter substantially equal to the outer diameter of the locking washer 11 and has a plate-like shape having a slight elastic repulsive force. As shown in FIG.
The outer peripheral side is provided with a contact portion 12a that comes into contact with the locking washer 11, and the inner peripheral side is provided with a plurality of convex portions 12b that are engaged with the small-diameter end shaft 9d by elastic repulsion.

Further, the damper 13b of the plate member 13
The plate member 13 is inserted into the small-diameter end shaft 9d in a state where the plate member 13 is set to the end 9c1 side of the male screw portion 9c of the lead screw 9, and the damper 13b1 is brought into contact with the end 9c1 of the male screw portion 9c. Is fitted into the groove 9d1 and locked.

When the locking washer 11 is fitted into the groove 9d1 and locked, the presser washer 12 is fitted to the small-diameter end shaft 9d, and the contact portion 12a of the presser washer 12 becomes a plate of the plate member 13. When the presser washer 12 is press-fitted to the portion 13c, the fitting of the presser washer 12 to the small diameter end shaft 9d is stopped.

As a result, the convex portion 12b of the presser washer 12 is fitted into the fitting portion 9d2 of the small-diameter end shaft 9d in a state of biting, and the plate member 13 and the locking washer 11 are pulled out of the plate member 13. The plate member 13 and the locking washer 11 are firmly fixed to the lead screw 9 because the plate member 13 and the locking washer 11 are held in a state where they are pressed from a direction facing the lead screw 9.

On the other hand, the helical gear 10a is meshed with a worm 10b constituting the remaining part of the speed reduction mechanism 10 while being rotatably supported by the gear case 8.
The worm shaft 10b1 of the worm 10b has
A motor shaft (not shown) provided in the seat motor 14 is connected via a flexible shaft (corresponding to the flexible shaft 116 shown in FIG. 4).

A seat motor 14 is mounted near an end of the upper rail 5 on the other side, and a motor shaft provided for the seat motor 14 is mounted in the gear case 8 provided in each of the upper rails 4 and 5 in the worm. 10b.

When the switch is switched to the sheet advance side in a state where the power is connected to the sheet motor 14 via a switch (not shown), the power on the positive side is supplied to the sheet motor 14 and the motor shaft of the sheet motor 14 is rotated. Rotates in the forward direction, so that the worm 10b rotates clockwise in FIG.

Since the worm 10b rotates clockwise in FIG. 1, the helical gear 10a is rotated in the forward direction, and the lead screw 9 is rotated in the forward direction.

Since the lead screw 9 rotates in the forward direction, the upper rails 4, 5 are moved rightward in FIG. 1 while the male screw portion 9c of the lead screw 9 meshes with the female screws 6a, 7a of the nut members 6, 7. Plate member 13 on the forward side)
Is moved until the damper 13b contacts the nut members 6 and 7, so that the sheet S is moved forward.

When the switch is switched to the sheet retreating side, the power on the opposite side is supplied to the sheet motor 14, and the motor shaft of the sheet motor 14 rotates in the opposite direction, so that the worm 10b is turned counterclockwise in FIG. Rotate in the direction.

Since the worm 10b rotates counterclockwise in FIG. 1, the helical gear 10a rotates in the opposite direction, and the lead screw 9 rotates in the opposite direction.

Since the lead screw 9 rotates in the opposite direction, the upper rails 4 and 5 are moved to the left side in FIG. 1 while the male screw portion 9c of the lead screw 9 meshes with the female screws 6a and 7a of the nut members 6 and 7. Plate member 13 on the retreat side)
The sheet S is moved backward because the damper 13b is moved until it comes into contact with the nut members 6 and 7.

When the sheet S moves forward and backward, and the plate member 13 comes into contact with the nut members 6, 7, the thrust of the nut members 6, 7 is first received by the holding washers 12, 12, and thereafter, When the locking washers 11, 11 abut against the tips of the lead screws 9, 9 of the grooves 9 d 1, 9 d 1 of the lead screws 9, 9, the locking washers 11, 11 receive the thrust of the nut members 6, 7.

The damper 13b of the plate member 13 relieves the impact at the time of abutment, and reduces the protrusion 12b of the presser washer 12.
Are fitted into the small-diameter end shaft 9d in a biting state to hold the plate member 13 and the locking washer 11, so that the plate member 13 and the locking washer 11 are not easily loosened with respect to the lead screw 9. It will be.

[0040]

As described above, according to the seat slide apparatus of the present invention, the thrust of the nut member is first received by the presser washer, and then the locking washer is moved to the leading end of the lead screw in the lead screw groove. The thrust of the nut member is received by the locking washer by abutting against the side. Therefore, there is an excellent effect that the productivity can be improved by eliminating the man-hour for forming the male screw for screwing the nut and the man-hour for screwing the nut as in the related art.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a seat slide device.

FIG. 2 is a perspective view illustrating an assembling relationship of a lead screw, a plate member, a locking washer and a presser washer in the seat slide device shown in FIG.

FIG. 3 is a partially broken side view of a conventional seat slide device.

FIG. 4 is an external view of a conventional seat slide device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat slide device 2 Lower rail 3 Lower rail 4 Upper rail 5 Upper rail 6 Nut member 6a Female screw part 7 Nut member 7a Female screw part 9 Lead screw 9c Male screw part 9d1 Groove 11 Locking washer 12 Holding washer 12a Contact part 12b Projecting part 13 Plate member Damper 14 Seat motor

Claims (1)

(57) [Scope of request for utility model registration] A lower rail fixed to a vehicle body , and supported by the lower rail so as to be movable back and forth;
To the upper rail to which the seat is fixed , and either the lower rail or the upper rail.
A sheet motor supported and capable of forward and reverse rotation, and rotated by forward and reverse rotation of the sheet motor, and
A lead screw with a threaded portion, and either the upper rail or the lower rail.
It is fixed and meshes with the male thread of the lead screw.
A combined female thread is formed, and the lead screw is turned.
To move on the lead screw.
Nut for moving the upper rail back and forth with respect to the rail
A seat slide device provided with a member, wherein a groove is formed at each of both ends of the lead screw.
And both ends of each of the lead screws
The part is slightly smaller than the groove of the lead screw
Formed to a thickness dimension, each of the lead screw
A locking washer locked in a groove, and a lead screw between the nut member and the locking washer.
And a plate member that is disposed on the lock member and is in contact with the locking washer, and is formed of a material that absorbs impact.
Disposed between the plate member and abutted against the plate member;
A damper which can be brought into contact with the nut member , and a portion having a substantially dish-shaped cross-section and having an annular elasticity;
Molded with material, elastic to the lead screw on the inner circumference
The locking washer on the outer periphery.
A holding washer with an abutting part for elastic pressing is formed.
Seat slide apparatus characterized in that it comprises.