JPH09207631A - Seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate generation of noise by providing an intervention member, which is capable of blocking the thrust occurring when a tightening member is tightened to a lead screw with respect to an output gear, between the output gear and the tightening member. SOLUTION: Crushed parts 24a, 24a of intervention members 24, 24 are crushed and deformed so as to shorten the distance from a first and a second tightening members 11, 12 to bodies 17a, 19a of a first and a second reduction gears 17, 19. Screwing of the first and the second tightening members 11, 12 is finished by flat washers 27, 28 abutting upon output gear fitting shafts 7a, 8a of lead screws 7, 8. Bodies 17a, 19a of the second and the fourth reduction gears 17, 18 are fitted to the first and the second lead screws 7, 8 without directly receiving the thrust of the first and the second tightening members 11, 12 by virtue of the intervention members 24, 24.

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 moving a seat.

[0002]

2. Description of the Related Art As a seat slide device for automatically moving a seat, an armature provided for a seat motor is connected to an input gear in a gear box fixed to the seat, and a resin meshing with the input gear is used. It is known that a lead screw is coupled to a manufactured output gear. The lead screw is arranged parallel to the upper rail fixed to the seat, and the lower rail movably attached to the upper rail is fixed to the vehicle body. Since the nut member screwed into the lead screw is fixed to the lower rail, the lead screw rotates via the input gear and the output gear when the armature of the seat motor rotates, and the side away from the nut member. Or move the sheet closer to you.

[0003]

In the seat slide device described above, the output gear is inserted through the end of the lead screw, and the double nut is screwed into the lead screw outside the output gear. The output gear is easily deformed in the direction orthogonal to the length direction of the screw, and when the output gear is deformed, the bearing portion of the output gear in the gear box and the output gear cause a friction, resulting in a friction noise. It could happen.

It is hard to say that the output gear does not undergo creep deformation due to heat or repetitive load generated when it meshes with the input gear, and the creep deformation of the output gear causes the length of the lead screw in the axial direction to change. If it becomes smaller, the tightening of the nut with respect to the lead screw may be loosened, in which case there is a problem that rattling may occur between the output gear and the lead screw, causing the same abnormal noise as above. Therefore, it has been an issue to solve these problems.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat slide device in which abnormal noise is not generated by preventing the output gear from being deformed.

[0006]

Configuration of the Invention

[0007]

In a seat slide device according to a first aspect of the present invention, a lower rail fixed to a vehicle body and a movably mounted along the lower rail,
A seat motor having an upper rail fixed to the seat and an armature that rotates forward or backward by connecting a power supply in the forward or reverse direction, and a seat motor, which is coupled to the armature of the seat motor and rotatably supported in a gear box. The input gear, the output gear meshed with the input gear and rotatably supported in the gear box, the lead screw arranged in parallel with the upper rail, and the lead screw are tightened to connect the output gear to the lead screw. A seat slide device comprising a mounting member and a nut member fixed to the lower rail and meshed with the lead screw, wherein the tightening member is attached to the lead screw between the output gear and the tightening member. It is configured with an intervening member that can block the thrust when tightened against the output gear. It is characterized by a door.

In the seat slide device according to the second aspect of the present invention, the lead screw has a nut member engaging tooth portion with which the nut member is engaged, and a diameter smaller than the nut member engaging tooth portion and closer to the end portion. Is formed and has a detent portion for detenting the output gear, and an output gear mounting shaft portion that is coupled to the output gear by the detent portion and a smaller diameter than the output gear mounting shaft portion, and formed at the end And a screw member for tightening the tightening member is provided, and the output gear is provided with a main body having a tooth portion meshed with the input gear, and the main body has a shaft for mounting the output screw of the lead screw. The shaft insertion portion having a length smaller than the length dimension of the portion by a predetermined size is formed, the interposition member is integrally formed on the tightening member side of the output gear, and the interposition member includes Tightening member is for lead screw tightening member When tightened Flip portion, it is characterized in that it has a structure in which deformable 潰成 unit to reduce the distance between the body and the fastening member of the output gear is formed.

In this case, the shaft part insertion part of the output gear is inserted into the output gear mounting shaft part of the lead screw, and the tightening member outputs the output of the lead screw to the output gear stopped by the rotation stop part of the lead screw. When it is screwed into the tightening member screw until it contacts the gear mounting shaft,
The tightening member is screwed into the output gear mounting shaft of the lead screw, which has a length larger than the length of the output gear body, and the distance between the output gear body and the tightening member is reduced. By deforming the collapsed part,
The output gear is attached to the lead screw by the fastening member without the thrust of the fastening member being transmitted to the body of the output gear.

In the seat slide device according to the third aspect of the present invention, the collapsing portion of the interposing member is formed so as to continuously or annularly project annularly on the tightening member side of the main body of the output gear. It is characterized by being configured.

In this case, the shaft portion insertion portion of the output gear is inserted into the output gear mounting shaft portion of the lead screw, and the tightening member outputs the lead screw to the output gear stopped by the rotation preventing portion of the lead screw. When it is screwed into the tightening member screw until it contacts the gear mounting shaft,
The tightening member is screwed into the output gear mounting shaft of the lead screw, which has a length larger than the length of the output gear body, and is continuous or annular in the tightening member side of the output gear body. By deforming the crushed portion that is formed to project discontinuously to reduce the distance between the body of the output gear and the tightening member, the thrust of the tightening member is not transmitted to the body of the output gear. The output gear is attached to the lead screw by the tightening member.

In the seat slide device according to the fourth aspect of the present invention, the lead screw has a nut member engaging tooth portion with which the nut member is engaged, and a diameter smaller than the nut member engaging tooth portion and closer to the end portion. Is formed and has a detent portion for detenting the output gear, and an output gear mounting shaft portion that is coupled to the output gear by the detent portion and a smaller diameter than the output gear mounting shaft portion, and formed at the end And a tightening member screw portion for tightening the tightening member, and the intervening member has a length larger than the length dimension of the output gear mounting shaft portion of the lead screw by a predetermined size. A configuration in which a tubular body having a tubular shape and having the same length dimension as the main body of the output gear and integrally formed with a locking portion that can be locked with the rotation stopping portion of the output gear mounting shaft portion is provided. It is characterized by

In this case, when the tightening member is screwed into the screw part for the tightening member of the lead screw, it is larger than the length of the output gear mounting shaft of the lead screw by a predetermined size. The length of the body of the output gear is the same, and at the position where the locking portion that can be locked to the rotation stopping portion of the output gear mounting shaft comes into contact with the integrally molded tubular body, Since the screwing is completed, at the position where the screwing of the tightening member is completed, the thrust of the tightening member is not directly transmitted to the output gear having the same length dimension as the cylindrical body, and the tightening member is It is screwed to the lead screw.

In the seat slide device according to the fifth aspect of the present invention, the tubular body of the interposing member is provided with at least one communicating portion penetratingly formed from the body of the output gear to the engaging portion. It is characterized by

In this case, when the tightening member is screwed into the screw part for the tightening member of the lead screw, it is larger than the length of the output gear mounting shaft of the lead screw by a predetermined size. A cylindrical main body of an intervening member having the same length dimension as the output gear main body, corresponding to the rotation stopping portion of the output screw mounting shaft portion of the lead screw, and integrally formed with the locking portion via the communicating portion. Since the screwing of the tightening member is completed at the position where it touches against, the thrust of the tightening member is applied to the output gear having the same length dimension as the cylindrical body at the position where the screwing of the tightening member is completed. Is not directly transmitted, the tightening member is screwed to the lead screw.

[0016]

In the seat slide device according to the first aspect of the present invention, when the tightening member is tightened with respect to the lead screw, the thrust of the tightening member is blocked from the output gear by the intervening member. In this state, the fastening member is fastened to the lead screw. Therefore, the output gear to which the thrust of the tightening member is not transmitted is attached to the lead screw without being deformed.

Also in the seat slide device according to claim 2, claim 3, claim 4 and claim 5 of the present invention,
Similarly to claim 1, the output gear to which the thrust of the tightening member is not transmitted is attached to the lead screw without being deformed.

[0018]

1 to 3, there is shown a first embodiment of a seat slide device according to the present invention.

The seat slide device 1 according to the present invention shown in FIG. 3 mainly includes a seat motor 2, a left lower rail 3, a right lower rail 4, a left upper rail 5, a right upper rail 6, and a first lead screw 7. , Second lead screw 8, first gear box 9, second gear box 10, first tightening member 11, second tightening member 12, first nut member 13, second nut member 14, and intervening members 24, 24.

In the seat motor 2, the armature 2b housed in the motor case 2a rotates normally when the positive side power source is connected, and reversely rotates when the reverse side power source is connected. The armature shaft 2b1 provided in this armature 2b is
One end of the motor case 2a is connected to the first reduction gear 16 in the first gearbox 9 via the cable 15, and the other end of the motor case 2a is connected to the first gearbox 9 in the second gearbox 10. It is connected to the second reduction gear 18.

The first lead screw 7 extends along the left upper rail 5 and has a male screw 7b provided at the center thereof meshed with a first nut member 13 described later.

The second lead screw 8 extends along the upper rail 6 on the right side and has a male screw 8b provided at the center thereof engaged with a second nut member 14 which will be described later.

Output gear mounting shafts 7a and 8a having a smaller diameter than the male screws 7b and 8b are provided near one ends of the first and second lead screws 7 and 8, respectively. Rotation stop portions 7a1 and 8a1 having oval cross sections are formed near the tips of 7a and 8a. The output washer mounting shaft portions 7a, 8a include a flat washer 25 disposed on the base end side,
First and third reduction gears 17, 19 described later are mounted via 26 and flat washers 27, 28 arranged on the tip side.

Then, at one end of each of the first and second lead screws 7 and 8, there are provided tightening member screw portions 7c and 8c having a diameter smaller than that of the output gear mounting shaft portions 7a and 8a. First and second tightening members 11 and 12, which will be described later, are screwed into the tightening member screw portions 7c and 8c.

The first and second lead screws 7 and 8 are
The other end is rotatably supported by a supporting portion (not shown) provided on the rear side of the left and right upper rails 5 and 6, and the output gear mounting shaft portions 7a and 8a, which are the one end sides, are the first and second gears. It is located in boxes 9 and 10.

The first gear box 9 is arranged on the left side of the upper rail 5, and the upper part thereof is fixed to a seat (not shown).

The second gear box 10 has a right upper rail side 6 which is arranged in parallel with the left upper rail 5.
The upper part is fixed to the seat.

The left upper rail 5 is movably assembled on the left lower rail 3, and the right upper rail 6 is mounted.
Is assembled so as to be movable on the lower rail 4 on the right side.

In the case 9a of the first gear box 9, as shown in FIG. 1, a first reduction gear 16 which is a worm is rotatably provided, and the first reduction gear 16 is also provided. The second reduction gear 17, which is a helical gear and is arranged orthogonally to the first and second bearings 20, 21
Is rotatably supported by the second reduction gear 1
Since 7 meshes with the first reduction gear 16, the rotational force input to the first reduction gear 16 becomes the reduced rotational force of the second reduction gear 17 on the output side. And the second
The first lead screw 7 is coupled to the reduction gear 17 of FIG.

Similarly to the first gearbox 9, the second gearbox 10 is also provided with the third reduction gear 18 in the case 10a, and the third and fourth bearings 22 and 23 form the fourth gearbox. The reduction gear 19 of is rotatably supported,
The second lead screw 8 is coupled to the fourth reduction gear 19 on the output side.

The second reduction gear 17 is provided with a main body 17a having a substantially cylindrical shape, and a tooth portion 17b is formed in the substantially central portion of the main body 17a toward the outer periphery. The first and second bearings 20 and 21 are arranged on both sides of the tooth portion 17b. Further, the shaft insertion portion 17 is provided inside the main body 17a.
c is provided, and the shaft insertion portion 17c has a first
The lead screw 7 has an engagement portion 17c1 formed in an oval hole shape so as to be engageable with the rotation stop portion 7a1 of the output gear mounting shaft portion 7a. Shaft part insertion part 17
Since the output gear mounting shaft portion 7a provided on the first lead screw 7 is inserted into c, the locking portion 17c1 of the shaft portion insertion portion 17c is the output gear mounting shaft portion of the first lead screw 7. By locking to the rotation stopping portion 7a1 of 7a, the rotation is stopped and coupled to the first lead screw 7.

Similarly to the second reduction gear 17, the fourth reduction gear 19 is also provided with a main body 19a, a tooth portion 19b, a shaft portion insertion portion 19c, and a locking portion 19c1, and the shaft portion insertion portion. The output gear mounting shaft portion 8a provided on the second lead screw 8 is inserted into the portion 19c while being prevented from rotating. Second,
Main bodies 17a and 19a of the fourth reduction gears 17 and 19
The length dimension L1 of the output gear mounting shaft portions 7a, 8a of the first and second lead screws 7, 8 having the plain washers 25, 26 arranged at the other end is predetermined. The size is smaller.

Then, in the second reduction gear 17, the first reduction gear 17
1 is located at one end on the left side in FIG. 1, which is close to the end of the lead screw 7, and the fourth reduction gear 19 is provided.
In FIG. 1, the interposition member 24 is arranged at one end on the left side in FIG. 1, which is close to the end portion of the second lead screw 8.

As shown in FIG. 2, the interposing members 24 and 24 integrally formed with the second and fourth reduction gears 17 and 19 are provided at one end of the second and fourth reduction gears 17 and 19, respectively.
The section has a triangular shape and is provided with crushed portions 24a, 24a which are continuously formed in an annular shape so as to project toward the first and second tightening members 11, 12 to be described later. Crushed portion 24a, 2
4a may be discontinuously formed as long as it is formed so as to project toward the first and second tightening members 11 and 12 at one end of the second and fourth reduction gears 17 and 19.

In the interposing members 24, 24, the main bodies 17a, 1 having the second and fourth reduction gears 17, 19 are provided.
The projecting dimension from the end of 9a is from the length dimension L2 of the tightening member screw portions 7c and 8c of the first and second lead screws 7 and 8 in which the flat washers 25 and 26 are arranged to the second and second dimension. 4 is slightly larger than the value obtained by subtracting the length dimension L1 of the main bodies 17a, 19a of the reduction gears 17, 19 from the first,
When the second fastening members 11 and 12 are screwed into the fastening member screw portions 7c and 8c of the first and second lead screws 7 and 8, respectively, the first and second fastening members 11 and 12 are Plain washer 2 on the side
7 and 28, and from the bodies 17a and 19a of the second and fourth reduction gears 17 and 19 to the first and second tightening members 11 and 1, respectively.
It has the function of changing the distance to 2.

The first and second tightening members 11 and 12 screwed into the tightening member screw portions 7c and 8c of the first and second lead screws 7 and 8 have flat washers 27 and 28, respectively. Since the first and second lead screws 7 and 8 are screwed only until they come into contact with the output gear mounting shaft portions 7a and 8a, the intervening members 24 and 24 form the second and fourth reduction gears 1.
The main bodies 17a and 19a included in Nos. 7 and 19 are not deformed to reduce the length dimension L1.

The first and second tightening members 11 and 12 are a single lock nut, and the first tightening member 11 is the first lock member.
After the plain washer 25, the second reduction gear 17 and the plain washer 27 are inserted into the output gear mounting shaft portion 7a of the lead screw 7, the screw portion 7 for the fastening member of the first lead screw 7
The second tightening member 12 is inserted into the output gear mounting shaft portion 8a of the second lead screw 8 after the plain washer 26, the fourth reduction gear 19 and the plain washer 28 are inserted, The second lead screw 8 is screwed into the tightening member screw portion 8c. At this time, the second and fourth reduction gears 17, 19
Is a detent portion 7a1, 8a1 formed on the output gear mounting shaft portions 7a, 8a of the first and second lead screws 7, 8.
Since the locking portions 17c1 and 19c1 are locked to the
It is prevented from rotating with respect to the second lead screws 7 and 8.

The first and second tightening members 11 and 12 are
Screw portion 7 for tightening member of second lead screw 7, 8
When it is screwed into c, 8c, the flat washers 27, 28 are
The interposition member 2 integrally formed with the fourth reduction gears 17 and 18.
The crushed portions 24a, 24a of the interposing members 24, 24 are crushed by the abutting against the crushed portions 24a, 24a of the first and second fastening members 11, 12 to the second. ,
Since the fourth reduction gears 17 and 19 are deformed so as to reduce the distance between them and the main bodies 17a and 19a, the flat washer 2
When 7 and 28 are in contact with the output gear mounting shaft portions 7a and 8a of the first and second lead screws 7 and 8, respectively, where screwing of the first and second tightening members 11 and 12 is completed, By the interposition members 24, 24, the main bodies 17a, 19a of the second and fourth reduction gears 17, 19 do not directly receive the thrust of the first and second tightening members 11, 12, but the main bodies 17a, 19a of the first and second leads. It is attached to the screws 7 and 8.

On the other hand, the first and second lead screws 7,
As shown in FIG. 3, the first and second nut members 13 and 14 meshed with the male screws 7b and 8b of the nut 8 are nut bodies that mesh with the first and second lead screws 7 and 8, respectively. 13a, 14a and nut bodies 13a, 14a
Since the nut housings 13b and 14b that accommodate therein are provided, when the first and second lead screws 7 and 8 rotate forward, the male screws 7b and 8b of the first and second lead screws 7 and 8 are screwed. While being inserted, the first and second gear boxes 9 and 10 are moved away from each other, and on the contrary, when the first and second lead screws 7 and 8 rotate in reverse, the first and second leads Male screw 7 of screw 7,8
The first and second gear boxes 9 and 10 are moved to the approaching side while being screwed into b and 8b.

In the seat slide device 1 having such a structure, the left and right upper rails 5 and 6 are attached to the seat, and the left and right lower rails 3 and 4 are fixed to the floor panel and assembled to the vehicle body. A controller for connecting a power source is electrically connected to the armature 2b of the seat motor 2. Since the controller is attached to the auto-driving position system, the current for manual operation is supplied by operating the manual switch, and the ignition switch is opened from the on position to the off position or the door is closed. A detection signal generated at that time supplies a current for automatic operation.

When the reverse side power source is connected to the armature 2b of the seat motor 2 by switching the manual switch to the forward side, the armature 2b rotates in the reverse direction, so that the first gear box 9 is connected via the cable 15.
The first reduction gear 16 rotates in the reverse direction inside the first reduction gear 1
When 6 rotates in reverse, the second reduction gear 17 also rotates in reverse, and the first lead screw 7 rotates in reverse. At the same time, the third reduction gear 18 in the second gear box 10
Reversely rotates, and the third reduction gear 18 reversely rotates, so that the fourth reduction gear 19 also reversely rotates and the second lead screw 8 reversely rotates, so that the first and second gear boxes 9, 10 are the first and second nut members 11, 12
The sheet is moved forward because it is moved to the side away from.

Contrary to the above, when the positive side power source is connected to the armature 2b of the seat motor 2 by switching the manual switch to the reverse side, the armature 2b rotates in the forward direction, and therefore the first arm is connected via the cable 15. The first reduction gear 16 rotates normally in the first gear box 9, and the first reduction gear 16 rotates normally, so that the second reduction gear 17 also rotates normally and the first lead screw 7 rotates normally. Rotate. At the same time, the third gear box 10
When the third reduction gear 18 rotates normally and the third reduction gear 18 rotates normally, the fourth reduction gear 19 also rotates normally,
The forward rotation of the second lead screw 8 moves the first and second gear boxes 9 and 10 to the side closer to the first and second nut members 11 and 12, so that the seat moves backward. It

Then, when the ignition switch is switched from the on position to the off position and the door is opened from the closed state, the armature 2b of the seat motor 2 is supplied with a current for automatic operation from the controller and the seat motor 2 is operated. Since a positive power source is connected to the armature 2b and the armature 2b rotates in the normal direction, the first and second lead screws 7, 8 are rotated in the normal direction and the first and second gear boxes 9, 10 are approached. The seat is moved and the seat moves backward. When the seat reaches the predetermined position, the controller cuts off the supply of the electric current to the armature 2b, so that the seat is stopped at the retracted position where the passenger can easily get in and out of the seat.

As described above, the second and fourth reduction gears 1
7, 19, the first and second tightening members 11, 12 are first,
Screw portion 7 for tightening member of second lead screw 7, 8
When screwed into c and 8c, the interposed members 24 and 24 receive the thrust of the first and second tightening members 11 and 12, and the collapsed portions 24a and 24a are deformed, whereby the first and second It is attached to the first and second lead screws 7 and 8 without directly receiving the thrust of the fastening members 11 and 12.

FIG. 4 to FIG. 5 show a second embodiment of the seat slide device according to the present invention.

In this case, the intervening members 29, 29 have a length larger than the length of the output gear mounting shafts 7a, 8a of the first and second lead screws 7, 8 by a predetermined size. A tubular body 29c made of metal in the shape of a
29c is provided, and this cylindrical main body 29c, 29c
Is the second and fourth reduction gears 1 as shown in FIG.
Locking portions 17d and 19d that have the same length as the main bodies 17a and 19a of 7 and 19 and can be locked to the oval stop portions 7a1 and 8a1 of the output gear mounting shaft portions 7a and 8a.
Is molded of resin.

Further, the cylindrical main bodies 29c and 29c have the structure shown in FIG.
As shown in FIG. 4, the circular hole-shaped communicating portions 29d, 29d formed through the inside face the outer peripheral side which is the main body 17a, 19a side of the second and fourth reduction gears 17, 19 facing each other.
It is provided in each place.

The communicating portions 29d and 29d are the tubular main body 29.
When the second and fourth reduction gears 17 and 19 are integrally formed of resin on the outer sides of c and 29c, the output gears of the first and second lead screws 7 and 8 having rotation stopping portions 7a1 and 8a1. A molding die (not shown) having substantially the same outer shape as the mounting shaft portions 7a and 8a is arranged inside the cylindrical main bodies 29c and 29c, and in that state, for molding the second and fourth reduction gears 17 and 19. Since the resin material is injected inside,
As shown in FIG. 5, the main bodies 17a, 19 of the second and fourth reduction gears 17, 19 are provided outside the cylindrical main bodies 29c, 29c.
Simultaneously with the molding of a, the locking portions 17d and 19d are molded inside the cylindrical main bodies 29c and 29c.

Then, as shown in FIG. 4, the length dimension L3 of the cylindrical main bodies 29c, 29c has a flat washer 25,
First and second lead screws 7, 8 in which 26 is arranged
The first and second tightening members 11 and 12 have the first and second leads because they are larger than the length dimension L2 of the output gear mounting shafts 7a and 8a. Before the flat washers 27 and 28 come into contact with the output gear mounting shaft portions 7a and 8a of the first and second lead screws 7 and 8 when being screwed into the tightening member screw portions 7c and 8c of the screws 7 and 8, respectively. In addition, the plain washers 27, 28 are provided with tubular bodies 29c, 29c
The cylindrical main bodies 29c, 29c directly receive the thrusts of the first and second tightening members 11, 12 by contacting with each other, and the main bodies 17a, 19a of the second and fourth reduction gears 17, 19 are connected to each other. The second and fourth reduction gears 17 and 19 are attached to the first and second lead screws 7 and 8 without transmitting the thrust forces of the first and second tightening members 11 and 12.

As described above, the second and fourth reduction gears 1
7, 19, the first and second tightening members 11, 12 are first,
Screw portion 7 for tightening member of second lead screw 7, 8
The tubular bodies 29c, 29c of the interposition members 29, 29 are screwed into the first and second tightening members 11, 1 when screwed into the c, 8c.
By receiving the thrust of 2, the thrust is attached to the first and second lead screws 7 and 8 without directly receiving the thrust of the first and second tightening members 11 and 12.

[0051]

As described above, according to the seat slide device of the first aspect of the present invention, when the tightening member is tightened with respect to the lead screw, the thrust of the tightening member is generated by the interposition member. Since the tightening member is tightened to the lead screw in the state of being blocked from the output gear, the output gear to which the thrust of the tightening member is not transmitted is attached to the lead screw without being deformed. By preventing it from being deformed, an excellent effect that no abnormal noise is generated is exerted.

Also in the seat slide device according to claim 2, claim 3, claim 4 and claim 5 of the present invention,
Similarly to claim 1, the output gear to which the thrust of the tightening member is not transmitted is attached to the lead screw without being deformed. Therefore, by preventing the output gear from being deformed, no abnormal noise is generated. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional side view around a lead screw in a first embodiment of a seat slide device according to the present invention.

FIG. 2 is a partially cutaway external view for explaining an assembling relationship between a reduction gear and a lead screw in the seat slide device shown in FIG.

3 is an overall schematic view of the seat slide device shown in FIG.

FIG. 4 is a partial vertical cross-sectional side view around a lead screw in a second embodiment of the seat slide device according to the present invention.

FIG. 5 (A-A) of the seat slide device shown in FIG.
It is a line sectional view.

6 is an external view of a tubular main body used in the seat slide device shown in FIG.

[Explanation of symbols]

 1 Seat Slide Device 2 Seat Motor 2b Armature 3 Lower Rail 4 Lower Rail 5 Upper Rail 6 Upper Rail 7 (Lead Screw) 1st Lead Screw 7a Output Gear Mounting Shaft 7a 1 Rotation Stop 7b (Nut Member Engagement Teeth) Male Screw 7c Tightening Attached member screw portion 8 (lead screw) 2nd lead screw 8a Output gear mounting shaft portion 8a1 Detent portion 8b (nut member engaging tooth portion) Male screw 8c Tightening member screw portion 9 (gear box) 1st Gear box 10 (gear box) second gear box 11 (fastening member) first fastening member 12 (fastening member) second fastening member 13 (nut member) first nut member 14 (nut Member) Second nut member 16 (Input gear) First reduction gear 17 (Input gear) Third reduction gear 17 Body 17c shaft inserting portion 18 (output gear) the second reduction gear 19 (output gear) fourth reduction gear 19a main body 19c shaft inserting portion 24 interposed member 24a 潰成 portion 29 interposed member 29c tubular body 29d communicating portion

Claims (5)

[Claims] 1. A lower rail fixed to the vehicle body side, an upper rail movably mounted along the lower rail and fixed to a seat, and an armature that rotates forward or backward by connecting a power source in the forward or reverse direction. A seat motor provided with, an input gear coupled to the armature of the seat motor and rotatably supported in the gear box, and an output gear meshed with the input gear and rotatably supported in the gear box. A lead screw arranged parallel to the upper rail, a tightening member that is fastened to the lead screw and connects the output gear to the lead screw, and is fixed to the lower rail and meshed with the lead screw. A seat slide device having a nut member, the output gear and the tightening In between the wood, the sheet sliding device characterized by 該締 with member has an intervening member capable of interrupting the output gear thrust when tightened against the lead screw. 2. The lead screw is formed with a tooth portion for engaging a nut member with which a nut member is engaged, and a diameter smaller than the tooth portion for engaging the nut member and formed near the end portion, and the output gear is stopped. An output gear mounting shaft portion that has a rotation stopping portion and is coupled to the output gear by the rotation stopping portion, and is formed at the end portion with a diameter smaller than that of the output gear mounting shaft portion, and the tightening member is tightened. The tightening member screw portion is provided, the output gear is provided with a main body having a tooth portion that meshes with the input gear, and the main body has a length larger than the length dimension of the output gear mounting shaft portion of the lead screw. A shaft insertion portion having a length smaller by a predetermined size is formed, and the interposing member is integrally formed on the tightening member side of the output gear. When tightening on the screw part of the Seat slide device according to claim 1, characterized in that deformable 潰成 portion so that a distance to reduce the between is formed between the clamping member and the. 3. The crushed portion of the interposing member is formed so as to continuously or annularly project annularly on the fastening member side of the main body of the output gear. Seat slide device. 4. The lead screw is formed with a tooth portion for meshing a nut member with which a nut member is meshed and a diameter smaller than that of the tooth portion for meshing the nut member, and is formed near the end portion, and the output gear is stopped. An output gear mounting shaft portion that has a rotation stopping portion and is coupled to the output gear by the rotation stopping portion, and is formed at the end portion with a diameter smaller than that of the output gear mounting shaft portion, and the tightening member is tightened. The fastening member has a threaded portion, and the intervening member has a tubular shape having a length larger than the length dimension of the output screw mounting shaft portion of the lead screw by a predetermined size. The length of the body is the same,
The seat slide device according to claim 1, further comprising a tubular main body integrally formed with an engaging portion that is engageable with the rotation stopping portion of the output gear mounting shaft portion. 5. The seat slide device according to claim 4, wherein the tubular main body of the interposing member is formed with at least one communication portion penetratingly formed from the main body of the output gear to the locking portion.