JP2000085419A - Seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-quality seat sliding device by using fastening members fastened to lead screws with moderate fastening torque and prevented from becoming loose from the lead screws. SOLUTION: This seat sliding device is provided with fastening members 10, 15 having cylinder parts 10b, 15b protruded in the axial direction of lead screws 9, 14 and arranged outside of the lead screws 9, 14, and loosening- preventing caulking parts 10e, 15e formed at the cylinder parts 10b, 15b caulked to the lead screws 9, 14 after being screwed to the lead screws 9, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet slide device for automatically sliding a sheet by rotating a lead screw.

[0002]

2. Description of the Related Art As a sheet slide device for automatically sliding a sheet by rotating a lead screw, an output gear is meshed with an output shaft of a sheet motor in a gear box, and the output gear is connected to an end of the lead screw. It is known that an output gear is connected to a lead screw by inserting a nut into an end of the lead screw by inserting the nut into an end of the lead screw.

[0003]

In the above-mentioned seat slide device, when the output gear is connected to the lead screw by the nut, the lock nut is used as the nut to prevent loosening. However, with the lock nut,
In order not to deform the teeth, it is tightened with a relatively low torque without being tightened with a high torque, and by being assembled without sufficient tightening,
There is a problem that the nut may be loosened, and solving this problem has been an issue.

[0004]

An object of the present invention is to provide a seat slide device of high quality by using a tightening member which is fastened to a lead screw with an appropriate tightening torque and does not loosen from the lead screw. It is an object.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided a seat slide apparatus comprising: a lower rail fixed to a vehicle body; an upper rail movably disposed along the lower rail and fixed to a seat side; A seat motor having an armature shaft that rotates forward by current supply in one direction and reversely rotates by current supply in the opposite direction, a gear box fixed to the upper rail, and an armature shaft of the seat motor rotatably supported by the gear box. And an output gear coupled to the output gear,
A lead screw that rotates forward and backward by a sheet motor, a tightening member that is screwed to an end of the lead screw and couples the lead screw to an output gear, and a nut body that can mesh with the lead screw and is fixed to the lower rail. In the seat slide device, the tightening member is formed with a cylindrical portion that protrudes in the axial direction of the lead screw and is disposed outside the lead screw, and the cylindrical portion is screwed into the lead screw. The locking device is characterized in that a locking portion for caulking the lead screw after forming is formed.

In the seat slide device according to a second aspect of the present invention, the lead screw has an output gear coupling shaft portion to which an output gear is coupled at an end of the lead screw main body with which the nut body is engaged. At the end of the output gear coupling shaft portion, a tightening member screw insertion shaft portion having a male screw into which the tightening member is screwed is formed, and the tightening member has a tightening member screw on the tightening member body. The cylindrical portion is formed so as to protrude along the axial direction of the insertion shaft portion, and a female screw is formed in the tightening member main body and the cylindrical portion. It is characterized in that the cylindrical portion is formed by being non-circularly crimped toward the tightening member screw shaft portion of the lead screw after being screwed into the male screw of the shaft portion.

According to a third aspect of the present invention, in the seat slide device, the output gear has a tooth portion which is housed in a gear box main body provided in the gear box and is meshed with the armature shaft side of the seat motor. A first shaft portion is formed at one end of the main body and rotatably supported by the gear box via a bearing, and is disposed at the other end of the output gear main body, and a gear box cover of the gear box is provided. A rotatable second shaft portion is formed, and the fastening member is assembled so as to be able to press against the second shaft portion of the output gear via a gap member. Features.

[0009]

In the seat slide device according to the first, second and third aspects of the present invention, the tightening member is screwed into the lead screw, and then the cylindrical portion thereof is swaged to the lead screw, thereby forming the lead screw. , A locking part is formed. Therefore, after the tightening member is screwed into the lead screw with an appropriate tightening torque, the locking member is tightened to the lead screw, so that the screw is loosened to the lead screw when screwing is completed. Stopped and fixed.

[0010]

1 to 4 show an embodiment of a seat slide device according to the present invention.

The illustrated seat slide apparatus 1 mainly includes a seat motor 2, a right lower rail 3, a right upper rail 4, a left lower rail 5, a left upper rail 6, a right gear box 7, a first output gear 8, Right lead screw 9, first tightening member 10, right nut body 11, left gear box 12, second output gear 1
3, the left lead screw 14, the second fastening member 1
5. It is composed of a nut body 16 on the left side.

The seat motor 2 includes a gear box 7 on the right side.
Mounted on In the seat motor 2, magnets 2b and 2c are fixed to face each other inside a motor case 2a, and an armature 2d is rotatably accommodated on the inner peripheral side of the magnets 2b and 2c. Armature 2d
Is provided with an armature shaft 2e.

In the seat motor 2, when a seat switch provided in a seat control circuit (not shown) is switched to a retreating side, a current on the positive side is supplied, whereby the armature shaft 2e rotates forward. When the seat switch provided in the seat control circuit is switched to the forward side, the current on the opposite side is supplied, so that the armature shaft 2e rotates in the reverse direction. The armature shaft 2e of the seat motor 2 is directly connected to the first output shaft 17 in the right gear box 7 and connected to the second output shaft 19 in the left gear box 12 by a cable 18. I have.

The gear box 7 on the right side is the seat motor 2
Of the motor case 2a. A first output shaft 17 is rotatably supported in the right gear box 7. The first output shaft 8 is orthogonal to the first output shaft 17.
Are rotatably supported.

A worm 17a is formed on the first output shaft 17. The worm 17a is meshed with a helical tooth 8b formed on the first output gear 8.

As shown in FIG. 2, the first output gear 8 has a first output gear body 8a disposed at the center and a helical tooth 8b formed thereon. A first shaft 8c is formed at one end of 8a, and a second shaft 8d is formed at the other end of the first output gear body 8a. The first output gear 8 has a lead screw insertion hole 8e penetrating from the center of the first shaft 8c to the center of the second shaft 8d. 8e is a part of the right lead screw 9
The cut portion receiver 8f is formed so as to be prevented from rotating with respect to the cut portion 9c1 formed at the bottom.

The first output gear 8 has a first gap member 20.
The first bearing 21 is inserted through the first shaft portion 8c through the
The first bearing 21 is supported in the right gear box 7, while the second shaft 8 d is mounted on the gear box cover 2.
2 rotatably supported. The gear box cover 22 has a screw 23 on the side of the right gear box 7,
Screwed by 23,23. The first output gear 8 is connected to the right lead screw 9.

The right lead screw 9 has a first stopper fixing shaft having an outer diameter smaller than that of the right lead screw body 9a on the right gear box 7 side of the threaded right lead screw body 9a. 9b, and the first stopper fixing shaft portion 9b
A first output gear coupling shaft portion 9c having an outer diameter smaller than that of the first stopper fixing shaft portion 9b is formed at the end of the first stopper portion.
A first fastening member screw insertion shaft portion 9d having an outer diameter smaller than that of the first output gear connection shaft portion 9c is formed at an end of the output gear connection shaft portion 9c. The right lead screw 9 has a second stopper fixing shaft portion 9e formed on the right lead screw main body 9a on the opposite side to the first stopper fixing shaft portion 9b.

A first damper 24 formed of an elastic member on the right lead screw main body 9a side is inserted through the first stopper fixing shaft 9b.
The first stopper 25 is fixed on the side of the output gear coupling shaft portion 9c. First damper 24, first stopper 25
When the right upper rail 4 moves rearward of the seat with respect to the right lower rail 3, the right nut body 11
, The stroke of the backward movement of the seat is set, and the impact at that time is reduced.

The first output gear coupling shaft portion 9c is provided with a first lead screw insertion hole 8 formed in the first output gear 8.
The first output gear coupling shaft portion 9c has a cut portion inserted into a cut portion receiver 8f formed in the lead screw insertion hole 8e of the first output gear 8 because the outer diameter dimension is smaller than that of the first output gear coupling shaft portion 9e. 9c1 is formed.

An external thread 9d1 is formed on the first fastening member screw insertion shaft portion 9d. This male screw 9d1 has the first
The first female screw 10c formed in the tightening member 10 is screwed.

A second damper 26 formed of an elastic member is inserted through the second stopper fixing shaft 9e on the right lead screw main body 9a side, and an end side of the right lead screw main body 9a. , A second stopper 27 is fixed. The second damper 26 and the second stopper 27 collide with the right nut body 11 when the right upper rail 4 moves to the front of the seat with respect to the right lower rail 3, thereby moving the seat forward. Set the stroke and reduce the shock at that time.

As shown in FIG. 3, the right lead screw 9 has a first output gear coupling shaft 9b through which a second gap member 28 and a shim 29 are respectively inserted. The portion 9b is inserted into the lead screw insertion hole 8e of the first output gear 8. At this time, the first gap member 20 and the first bearing 2 are provided in the right gear box 7.
1. The first output gear 8 is rotatably accommodated by the gear box cover 22.

The lead screw 9 on the right side is formed by inserting the first output gear coupling shaft 9b into the lead screw insertion hole 8e of the first output gear 8 so that the first fastening member screw insertion shaft is formed. 9 d is arranged to protrude outside the gear box cover 22. Then, the first fastening member screw insertion shaft portion 9
d, the third gap member 30 is inserted, and the first fastening member 10 is screwed into the male screw 9d1 of the first fastening member screw insertion shaft portion 9d.

The first tightening member 10 is provided with a first tightening member main body 10a formed in a nut shape, and the first tightening member main body 10a is connected to the right lead screw 9a.
A first cylindrical portion 10b is formed in a cylindrical shape and protrudes in the axial direction of the first tightening member screw insertion shaft portion 9d provided in the first cylindrical portion 10b. A first female screw 10c penetrating through is formed.

The first fastening member 10 has a first gear box contact portion 10d formed on the opposite side of the first cylindrical portion 10b of the first fastening member body 10a. The first gear box contact portion 10d is a first fastening member screw insertion shaft portion 9 in which the first fastening member 10 is provided on the right lead screw 9.
By being screwed into the male screw 9d1 of d, it comes into contact with the gear box cover 22 of the right gear box 7 via the third gap member 30.

The first tightening member 10 includes a first output gear 8
Until the distance from the second gap member 28 to the third gap member 30 across the first gap member 30 reaches a predetermined size, the first fastening member screw insertion shaft portion 9d provided on the right lead screw 9 Screw 9d1. Then, when the first gear box contact portion 10d contacts the third gap member 30 and the screwing is completed, the first fastening member 10
As shown in FIG. 4, the V-shaped caulking portions 51 are arranged opposite to each other in the radial direction of the first cylindrical portion 10b.
The first cylindrical portion 10b is caulked by the first jig 51 and the second jig 52 each having a and 52a to form a first locking caulking portion 10e having a square shape. . The shape of the caulking performed on the first cylindrical portion 10b is not limited to the above-described square, but is a non-circular shape different from the cylindrical shape of the first fastening member screw insertion shaft portion 9d of the right lead screw 9. If so, it may be a pentagon or a hexagon.

The first locking portion 10e is provided with a first fastening member screw insertion shaft portion 9d provided on the right lead screw 9.
Since the first cylindrical portion 10b is swaged with respect to the male screw 9d1, the first tightening member 10 is formed so as to bite into the male screw 9d1. It has a function of fixing the male screw 9d1 of the portion 9d so as not to be loosened. The first fastening member 10 is formed by tightening the first cylindrical portion 10b after the screwing is completed to form the first locking member 10e. The screwing of the insertion shaft portion 9d into the male screw 9d1 can be performed with an appropriate tightening torque,
It is locked with a torque larger than the torque used for screwing and is fixed to the right lead screw 9.

The right nut body 11 is engaged with the right lead screw body 9a of the right lead screw 9. The right nut body 11 is screwed to the right lower rail 3.

On the other hand, the left gear box 12, the second output shaft 19, the second output gear 13, the left lead screw 14, the second tightening member 15, and the left nut body 16 are respectively connected to the right and left. Since they are formed as a pair and assembled in the same manner as the right side, the description is omitted here. As shown in FIG. 2, the second fastening member 15 has
Similarly to the first tightening member 10, the second tightening member main body 15a, the second cylindrical portion 15b, the second female screw 15c, the second
Gear box contact portion 15d, second locking caulking portion 15e
Are formed respectively.

In such a seat slide device 1, the right and left upper rails 4 and 6 are screwed to seats (not shown), and the right and left lower rails 3 and 5 are screwed to floor panels of a vehicle body (not shown). The seat motor 2 is stopped, electrically connected to the seat control circuit, and mounted on the vehicle body.

When the seat switch provided in the seat control circuit is switched to the reverse side, the armature shaft 2e of the seat motor 2 rotates forward and the first output shaft 17 and the second output shaft 19 rotate forward. Therefore, the first output gear 8 rotates forward in the right gear box 7 and the second output gear 13 rotates forward in the left gear box 12, so that the right lead screw 9 and the left lead screw 9 are rotated. 14 rotate forward.

When the right and left lead screws 9 and 14 rotate forward, respectively, the right and left gear boxes 7 and
12 moves in the direction approaching the right and left nut bodies 11 and 16, respectively.
The upper rails 4 and 6 on the right and left sides respectively move toward the retreating side of the seat.

When the seat switch provided in the seat control circuit is switched to the forward side, the armature shaft 2e of the seat motor 2 reversely rotates, and the first output shaft 17 and the second output shaft 19 respectively reversely rotate. Therefore, the first output gear 8 reversely rotates in the right gear box 7 and the second output gear 13 reversely rotates in the left gear box 12, so that the right lead screw 9 and the left lead screw 14 rotate in reverse.

When the right and left lead screws 9 and 14 rotate in reverse, respectively, the right and left gear boxes 7 and
Since the 12 moves away from the right and left nut bodies 11 and 16, the right and left upper rails 4 and 6 move toward the forward side of the seat with respect to the right and left lower rails 3 and 5.

As described above, in the seat slide device 1, the first and second tightening members 10 and 15 are screwed into the right and left lead screws 9 and 14, respectively, and then the first and second tightening members 10 and 15 are respectively rotated. The first and second locking caulking portions 10e and 1e are tightened by caulking the second cylindrical portions 10b and 15b.
With the formation of 5e, the right and left lead screws 9, 14 are loosened and fixed to the right and left lead screws 9, 14, respectively, in a state where the screwing of the right and left lead screws 9, 14 with an appropriate tightening torque is completed. Becomes

[0037]

As described above, according to the seat slide device according to the first, second and third aspects of the present invention,
After the fastening member is screwed into the lead screw, the cylindrical portion thereof is swaged to the lead screw, thereby forming a loosened fastening portion that is prevented from loosening with respect to the lead screw. Therefore, the fastening member is screwed into the lead screw with a large torque, and the locking portion is tightened against the lead screw. You. Therefore, it is possible to achieve an excellent effect of achieving high quality by using a tightening member that can be tightened to the lead screw with an appropriate tightening torque and does not loosen from the lead screw.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a seat slide device according to the present invention.

FIG. 2 is a longitudinal sectional front view around a lead screw in the seat slide device shown in FIG. 1;

3 is an external perspective view of each component for explaining an assembling relationship between a lead screw and an output gear in the seat slide device shown in FIG. 1;

FIG. 4 is an external perspective view for explaining caulking to a tightening member in the seat slide device shown in FIG. 1;

[Explanation of symbols]

Reference Signs List 1 seat slide device 2 seat motor 2e armature shaft 3 lower rail (right lower rail) 4 upper rail (right upper rail) 5 lower rail (left lower rail) 6 upper rail (left upper rail) 7 gear box (right gear box) 8 output gear (First output gear) 8a Output gear main body (first output gear main body) 8b Tooth (helical) 8c First shaft 8d Second shaft 9 Lead screw (right lead screw) 9a Lead Screw body (right lead screw body) 9c Output gear coupling shaft (first output gear coupling shaft) 9d1 Male screw 9d Tightening member screw insertion shaft (first tightening member screw insertion shaft) 10 Tightening Member (first fastening member) 10a Tightening member body (first fastening member body) 10b Tube portion (first tube portion) 0c Female thread (first female thread) 10e Loosening part (second loosening part) 11 Nut body (right nut body) 12 Gear box (left gear box) 13 Output gear (second output) Gear) 14 Lead screw (left lead screw) 15 Fastening member (second fastening member) 15a Fastening member main body (second fastening member main body) 15b Tube part (second cylinder part) 15c Female screw ( 15e Loosening / clamping section (second locking / clamping section) 16 Nut body (left nut body) 21 Bearing (first bearing) 22 Gear box cover 30 Gap member (third gap) Element)

Claims (3)

[Claims] 1. A lower rail fixed to a vehicle body, an upper rail movably disposed along the lower rail, and fixed to a seat side; a forward rotation by supplying current in a forward direction; A seat motor having an armature shaft that rotates in reverse, a gear box fixed to the upper rail, an output gear rotatably supported by the gear box and coupled to an armature shaft of the seat motor, and coupled to the output gear A lead screw that is rotated forward and backward by the sheet motor; a fastening member that is screwed to an end of the lead screw and that couples the lead screw to an output gear; A seat slide device having a nut fixed to a lower rail. The fastening member is formed with a tubular portion projecting in the axial direction of the lead screw and disposed outside the lead screw, and is screwed into the lead screw in this tubular portion. A seat slide device having a locking portion that is crimped to a lead screw. 2. An output gear coupling shaft portion to which an output gear is coupled is formed at an end of a lead screw main body with which a nut body is engaged, and an end of the output gear coupling shaft portion is formed on the lead screw. A fastening member screw insertion shaft portion having a male screw into which the fastening member is screwed is formed in the portion, and the fastening member has a cylindrical member in the fastening member body along the axial direction of the fastening member screw insertion shaft portion. The part is formed protruding,
A female screw is formed in the tightening member main body and the cylindrical portion, and the female screw is inserted into the male screw of the tightening member screw shaft of the lead screw. The seat slide device according to claim 1, wherein the tubular portion is formed by caulking non-circularly toward the insertion shaft portion. 3. The output gear is disposed at one end of an output gear main body having a tooth portion which is housed in a gear box main body provided in the gear box and is meshed with an armature shaft side of a seat motor, and is provided via a bearing. A first shaft portion rotatably supported by the gear box is formed,
A second end disposed at the other end of the output gear body and rotatably supported by a gear box cover of the gear box;
3. The seat slide according to claim 2, wherein the shaft member is formed so as to be able to press against the second shaft portion of the output gear via a gap member. apparatus.