JP2566244Y2 - Vertical adjustment device for vehicle seat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical position adjusting device for adjusting the height of a vehicle seat, and more particularly to a mechanism for driving a connecting shaft.

[0002]

2. Description of the Related Art Conventionally, an automobile seat is provided with a vertical position adjusting device capable of changing a height according to a physique or the like of a driver. As such a vertical position adjusting device, the front part and the rear part of the seat are supported on the front connection shaft and the rear connection shaft via links, respectively.
On the other hand, a screw rod driven by a motor is provided, a nut member is screwed into the screw rod, and the nut member is rotatably mounted on a bracket mounted on the connection shaft, and the nut is rotated by rotating the screw rod. In some cases, the connecting shaft is rotated via a member and a bracket to change the height of the front and rear portions of the seat.

[0003]

In the driving mechanism of the vertical position adjusting device as described above, it is necessary to stop the motor when the nut member moves to the tip of the screw rod. It is sufficient to provide a stopper member against which the nut member abuts and stop the motor when an overload is applied. In this case, if the metal nut member abuts against the metal stopper member, The shock at the time is large, and the motor itself or the interlocking gear portion of the motor and the screw rod is suddenly overloaded, and the life of the motor and the interlocking gear portion is shortened.

[0004]

According to the present invention, an elastic member is provided on an outer surface of a nut member, and an end of the screw rod is sequentially arranged from an end toward the nut member.
And the support member is fixed, and the elastic member of the nut member is received.
A stopper member is attached rotatably, and this stopper member is
A spring washer that presses against the support member is rotatably mounted.
The outer diameter of the spring washer is larger than the outer diameter of the support member.
It is characterized by being enlarged.

[0005]

[Function] At the stroke end, the nut member
It hits the stopper member through the washer. And this
The stopper member is a support member fixed to the screw rod
The nut member is stopped by the support member
You. At this time, the nut member is a non-rotating body, and the support member
Is a rotating body, but the outer diameter of the spring washer is
Because it is larger than the diameter, between the spring washer and the stopper member
Is the frictional rotation between the support member and the stopper member.
Force is greater than the force, and the stopper member is
Free rotation. The elastic member on the nut member side and the spring
No sliding occurs between the washer and the stopper member.
Thus, sticking can be prevented. Further , since the elastic member abuts on the stopper member by attaching the elastic member to the nut member, the shock at the time of the abutment is reduced, and it is possible to prevent the motor itself and the interlocking gear from being suddenly overloaded.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of a left supporting portion of the vertical position adjusting device for a vehicle seat to which the present invention is applied, FIG. 2 is a side view of a right supporting portion of the adjusting device, and FIG. 3 is a front drive mechanism of the device. 4 is an enlarged view of a rear drive mechanism of the device, and FIG. 5 is an enlarged view of a tip end of a screw rod of the mechanism.

A pair of left and right lower rails 1 are provided on the floor of the vehicle.
L, 1R are fixed in the front-rear direction, and the lower rails 1L, 1
R, upper rail 2 via a slide member (not shown)
L and 2R are slidably engaged with each other.
Base brackets 3L, 3R are erected on L, 2R,
A front connecting shaft 4 and a rear connecting shaft 5 are rotatably supported between the base brackets 3L and 3R so as to be separated from each other forward and backward.

Links 6L and 6R are fixed to both ends of the front connecting shaft 4, and the links 6L and 6R are connected to links 8L and 8R pivotally supported on the front ends of the seat pivot brackets 7L and 7R. I have. Links 9L and 9R are fixed to both ends of the rear connecting shaft 5, and the front ends of the connecting rods 10L and 10R are connected to the links 9L and 9R. The rear ends of the connecting rods 10L and 10R are connected to the base bracket 3L and 3L. 3R is connected to one end of links 11L and 11R pivotally supported at the rear end, and the other ends of the links 11L and 11R are pivot brackets 7
Brackets 12L, 12R fixed to the rear ends of L, 7R
It is connected to.

The links 11L and 11R have a projection 1
3L, 13R are integrally formed, while stopper portions 14L, 1 engageable with the projections 13L, 13R of the links 11L, 11R are provided at the rear ends of the base brackets 3L, 3R.
4R is formed so that the links 11L and 11R do not swing backward beyond a predetermined position.

Further, as shown in FIG. 3, a substantially L-shaped support bracket 15 is rotatably fitted to the rear connecting shaft 5, and the front end of the support bracket 15 is locked to the front connecting shaft 4. A bracket 17 attached to a gear box 16 is pivotally supported at the lower rear end of the support bracket 15.
A front motor 18 is attached to the side of the gear box 16, and a screw rod 19 projecting forward from the gear box 16 is rotated by the motor 18. A nut member 20 is screwed onto the screw rod 19. The nut member 20 is rotatably attached to the bracket 21 of the front connection shaft 4.

Then, a stopper member 23 with which the nut member 20 abuts is fixed to the tip end of the screw rod 19 with a nut 24, and a spring washer 25 is further rotated on the screw rod 19 on the contact surface side of the stopper member 23. Fitted as possible. The reason why the spring washer 25 is used as the washer is that if the washer is not initially set, it may move in the axial direction and generate abnormal noise, and a normal washer and a spring washer may be used in combination. . Further, when the diameter of the spring washer 25 is smaller than that of the stopper member 23, the spring washer 25 may enter the gap 19a between the screw rod 19 and the stopper member 23.
The spring washer 25 has the same diameter as that of the stopper member 23 to prevent an erroneous assembly. On the other hand, on the outer surface of the nut member 20, a rubber 2 which is an elastic member abutting against the stopper member 23 is provided.
6 is attached.

As shown in FIG. 4, a substantially L-shaped support bracket 28 is rotatably fitted to the front connection shaft 4 and the rear end of the support bracket 28 is locked to the rear connection shaft 5. A bracket 30 attached to a gear box 29 is pivotally supported at the lower front end of the support bracket 28. A rear side motor 31 is attached to the side of the gear box 30, and a screw rod 32 projecting rearward from the gear box 30 is rotated by the motor 31, and a nut member 33 is screwed into the screw rod 32, The nut member 33 is rotatably attached to a bracket 34 of the rear connecting shaft 5.

[0013] A stopper member 35 in contact with a nut member 33 is fixed to the tip end of the screw rod 32 with a nut 36, and a spring washer 37 is rotated on the screw rod 33 on the contact surface side of the stopper member 35. And a stopper member 3 is provided on the outer surface of the nut member 33.
A rubber 38 which is an elastic member that comes into contact with 5 is attached.

FIG. 6 is a view showing another embodiment. In the above-mentioned embodiment, the stopper members 23 and 35 are fixed to the screw rods 19 and 32 by nuts 24 and 36. In that case, the stopper members 23 and 35 which also function as free washers are attached to the screw rods 19 and
A support member 40 is rotatably fitted to the support member 32, and a support member 40 is interposed between the nuts 24 and 36 and the stopper members 23 and 35 on the opposite sides of the spring washers 25 and 37. As is apparent from the drawing, this support member 40
Smaller outer diameter than the outer diameter of the washer 25, 37
It is.

In the vertical position adjusting device constructed as described above, when the front motor 18 is rotated to rotate the screw rod 19, the nut member 20 moves and the bracket 21 is pulled or pushed. , The front connecting shaft 4 rotates by that amount, and this rotation
L, 6R and the links 8L, 8R are transmitted to the pivot brackets 7L, 7R to raise or lower the front portion of the seat. When the rear motor 31 is rotationally driven to rotate the screw rod 32, the nut member 33 moves and the bracket 34 is pulled or pushed, so that the rear connecting shaft 5 rotates by that amount, and this rotation is performed. Links 9L, 9R, connecting rods 10L, 10R and link 11
The rear part of the seat is raised or lowered by being transmitted to the pivot brackets 7L, 7R via the L, 11R.

By the way, the rear side will be described as an example.
When the nut member 33 is moved by rotating the screw rod 32, the nut member 33 comes into contact with the stopper member 35 and stops, so that an overload is applied to the rear motor 31. Detect and motor 3
1 can be stopped. In this case, the nut member 33
If the rubber member 38 is not provided, the nut member 33 comes into direct contact with the stopper member 35, and at the same time, an overload is suddenly applied. By making contact with the member 35, the shock at the time of contact is small and the overload suddenly disappears.

When the rubber 38 of the nut member 33 is brought into contact with the stopper member 35 as described above, if there is no spring washer 37, the rubber 38 is twisted because the stopper member 35 is rotating at the time of contact. When the torsion reaches a certain degree, the lock state is established and an overload is applied. For this reason, the stopper member 35 may be in a state where the rubber 38 of the nut member 33 is stuck. In such a state, the restart in the reverse direction is hindered in relation to the starting torque of the motor. Therefore, according to the structure of FIG. 5 , the spring washer 37 is rotatably fitted so that the spring washer 37 comes into contact with the rubber at the time of contact, and the stopper member 35 comes into contact with the washer 37 and rotates. Therefore, the rubber 38 of the nut member 33 does not stick to the stopper member 35,
Restarting in the reverse direction can be reliably performed. Also figure
6, the spring washer 37 and the stopper
Since the material 35 is rotatably fitted, the screw
The pad 32 and the support member 40 rotate, and the stopper member 3
5 and the washer 37 are not rotated, and the stopper member 3
Relative rotation occurs between 5 and the support member 40. Spring wa
Because the outer diameter of the shear 37 is larger than the outer diameter of the support member 40
is there. As a result, the spring washer 37 and the stopper member
Rubber 38 of nut member 33 does not stick to 35
Thus, the restart in the reverse direction can be performed reliably.

[0018]

[Effects of the Invention] As described above, according to the present invention,
The elastic member on the nut member side, the spring washer and the
Prevents sticking because no sliding occurs between the paper member
it can. In addition, an elastic member is attached to the nut member.
Therefore, the elastic member comes into contact with the stopper member.
The shock of the motor itself and the interlocking gear
It is possible to prevent an overload from being applied to the section.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle seat vertical position adjusting device to which the present invention is applied.

FIG. 2 is a side view of a right support portion of the adjustment device.

FIG. 3 is an enlarged view of a front drive mechanism of the apparatus.

FIG. 4 is an enlarged view of a rear drive mechanism of the device.

FIG. 5 is an enlarged view of a tip end of a screw rod of the mechanism unit.

FIG. 6 is a view similar to FIG. 5, showing another embodiment.

[Explanation of symbols]

1L, 1R: Lower rail, 2L, 2R: Upper rail, 3L, 3R: Base bracket, 4: Front connecting shaft, 5: Rear connecting shaft, 6L, 6R, 8L, 8
R, 9L, 9R, 11L, 11R ... link, 7L, 7R
… Pivot bracket, 10L, 10R… Connecting rod,
15, 34 ... support bracket, 16, 29 ... gear box, 18, 31 ... motor, 19, 32 ... screw rod, 20, 33 ... nut member, 23, 35 ... stopper member, 25, 37 ... spring washer, 26, 38: rubber (elastic member) , 40: support member .

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshitaka Tsuboi 1-14-1 Fujiwara-cho, Gyoda-shi, Saitama Pref. (JP, U) Hikaru 2-91032 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A front part and a rear part of a seat are supported by front and rear connection shafts via links, respectively, and a nut member is screwed into a screw rod which is driven to rotate by a motor. A vertical position of a vehicle seat which is rotatably mounted on a bracket mounted on the connecting shaft, and rotates the screw rod to rotate the connecting shaft to change the height of a front portion and a rear portion of the seat. In the adjusting device, an elastic member is provided on an outer surface of the nut member.
In order, fix the support member in order, and adjust the elasticity of the nut member.
The stopper member that receives the member is rotatably mounted, and
Turn the spring washer that presses the topper member against the support member.
The spring washer is mounted so that its outer diameter is larger than the outer diameter of the support member.
Vertical position adjusting device of a vehicle seat, characterized in that Kushida.