JPH07347Y2 - Power seat slide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention supports a seat by fitting a rail on a vehicle body side fixed to an installation site and a rail on the vehicle body side relative to each other so as to be movable back and forth. A rail unit having a seat-side rail is provided, and the front-and-rear position of the seat is adjusted by moving the rail on the vehicle body side and the rail on the seat side relatively in the front-rear direction via a drive unit by power. The present invention relates to a power seat slide device.

"Prior Art" Conventionally, as a power seat slide device of this type, for example, there is one as shown in FIG.

That is, the rail 1 on the vehicle body side and the rail 2 on the seat side are each formed in a groove-shaped cross section, and both rails 1 and 2 are fitted to each other so as to be movable back and forth. Bearing members 9 are rotatably interposed between the portion 1a and both side portions of the main face plate a of the rail 2 on the seat side. A drive unit 3 capable of changing the rotational force of a drive motor (not shown) into a force in the front-rear direction so that both rails 1 and 2 can be moved in the front-rear direction is housed in a space formed by both rails 1, 2.
The drive unit 3 is screwed rotatably to the screw member 4 rotatably supported on the seat-side rail 2 and is mounted on the vehicle-side rail 1 so as not to be movable in the front-rear direction and non-rotatable. A nut member 5 and a reduction mechanism 6 that transmits the reduced rotational force to the screw member 4. The reduction mechanism 6 includes a gear case 7, a worm 8, and a worm wheel 8a. The gear case 7 has a worm bearing portion 8b. It is fixed so as to project outward.

A reduction mechanism 6 with a deep groove at the front end of the seat-side rail 2
A storage portion 2b for the vehicle is formed, and a notch 2c into which the worm bearing portion 8b is fitted is bored in the side wall of the rail 2 on the seat side, and an output shaft that is interlocked by power is connected to the worm 8. Two mounting protrusions 7a are projected on the gear case 7, and these mounting protrusions 7a are respectively fitted in the small holes 2d formed in the seat-side rail 2 and are respectively stopped by fastening screws 9a. There is.

On the other hand, in order to reduce the weight of the product, the material of both rails 1 and 2 is made of a light metal material such as aluminum material.

"Problems to be solved by the invention" However, in such a conventional power seat slide device, when both rails 1 and 2 are made of a light metal material such as aluminum material and each is formed by an extrusion method, Main face plate of both side edges 1a of the rail 1 and the seat-side rail 2
In order to insert the bearing member 9 between both side portions of the rail 2a, the side edges 1a of the rail 1 on the vehicle body side are simply molded so as to come close to both sides of the main face plate 2a of the rail 2 on the seat side. Both side edges of the rail 1 of the vehicle are shaped so as to interfere with the worm bearing portion 8b. For example, if the groove of the rail on the vehicle body side is made shallow so as not to interfere with the worm bearing portion 8b, The distance between the rail 2 on the seat side and the both sides of the main face plate 2a greatly expands, and it is necessary to provide a special rolling element in place of the bearing member 9, which increases the cost and fixes the gear case 7 without rattling. Therefore, two screws 9a are required, which also causes a problem of increased cost.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a power seat slide device that can be reduced in weight and cost.

"Means for Solving the Problem" The gist of the present invention for achieving such an object is that a rail on the vehicle body side fixed to an installation site and a front and rear movement relative to the rail on the vehicle body side are possible. A rail unit having a seat-side rail that fits to support the seat, and is moved by power to relatively move the vehicle-body-side rail and the seat-side rail in the front-rear direction via a drive unit. In the power seat slide device configured to adjust the front-back position of the worm, the drive unit includes a worm case unit that accommodates a worm that rotates by the power and a worm wheel unit that accommodates a worm wheel that meshes with the worm. Has a gear case integrally formed in the vehicle direction, and the gear case can be inserted from the front-rear direction into the space between the rail on the vehicle body side and the rail on the seat side. In order to be able to fit, one of the rails on the vehicle body side and the rail on the seat side is formed with a constant groove-shaped cross section so that the worm case portion can be fitted, and the other rail is fitted with the worm wheel case portion. Is formed in a constant groove-shaped cross section so that it can be inserted, and a fitting groove extending in the front-rear direction is formed on one of the groove wall of the one rail and both side portions of the gear case, and the fitting groove is fitted into the fitting groove. A power seat slide device characterized in that a ridge portion for restraining the gear case on the plane orthogonal to the front-rear direction so as to prevent rattling is formed on the other of the groove wall of the one rail and both side portions of the gear case. Exist in.

[Operation] The rail on the vehicle body side and the rail on the seat side are fitted so as to be movable back and forth relatively.

Next, the drive unit is inserted into the space between the rail on the vehicle body side and the rail on the seat side from the front-rear direction. As a result, the worm case portion fits into one of the vehicle body side rail and the seat side rail, and the worm wheel case portion fits into the other rail.

At this time, the protrusion on the other side is fitted into the groove on one side of the groove wall of one rail and on both sides of the gear case, so that the gear case rattles on the plane orthogonal to the front-rear direction. Imprisoned impossibility.

Next, if the gear case is fixed to one rail at only one place, the gear case is attached to the one rail in a back and forth direction so as not to rattle.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention.

As shown in FIGS. 1 and 3, a seat (not shown) is mounted on the vehicle body floor 10 through the power seat slide device 20a so as to be adjustable in forward and backward movement.

The power seat slide device 20a includes a pair of rail units 20, 20 which are arranged below both side portions of the seat and extend in the front-rear direction. Rail unit 20 is the car body floor 1
A rail on the vehicle body side fixed to 0 via the leg members 12 and 13
21 and a rail 22 on the seat side that is fitted to the rail 21 on the vehicle body side so as to be movable back and forth and supports the seat.

The rail 21 on the vehicle body side is formed of an aluminum material in a constant groove-shaped cross section, and has a bottom surface portion 23 and both side walls 24. Similarly, the seat-side rail 22 is made of aluminum and has a constant groove-shaped cross section, and has a ceiling portion 25 and side walls 26.

Side edges 27 are formed outward on both side walls 24 of the rail 21 on the vehicle body side. Similarly, holding grooves 28 for holding the side edge portions 27 are formed on both side walls 26 of the seat-side rail 22. A ridge portion 29 is provided on the inside of the groove at an intermediate portion in the vertical direction of both side walls 26 of the rail 22 on the seat side.

On the side edge 27 of the rail 21 on the vehicle body side, a concave portion 27a having an arc-shaped cross section is formed.
Similarly, a recess 29a having an arc-shaped cross section is formed in the ridge portion 29 of the seat-side rail. The recesses 27a and 29a having both arc-shaped cross sections form a storage portion for the bearing 50 that is rollable when both rails 21 and 22 move relatively back and forth.

The opening of the rail 21 on the vehicle body side and the opening of the rail 22 on the seat side are aligned, and the bottom portion 23 and the side walls 24 of the rail 21 on the vehicle body side are combined.
A storage space 20b is formed by being surrounded by the ceiling portion 25 of the rail 22 on the seat side and the side walls 26.

As shown in FIGS. 1 to 3, a drive unit 30 is arranged in the storage space 20b. The drive unit 30 has a screw member 31 extending in the front-rear direction and a nut member 32 screwed onto the screw member 31.

The nut member 32 is screwed in a state where the lower surface portion 32a of the nut member 32 is in contact with the bottom surface portion 23 so that the nut member 32 cannot rotate, and the stopper members 35 and 36 are provided.
It is supported by the rail 21 on the vehicle body side so that it cannot be moved back and forth as it is sandwiched between the front and rear.

A gear case 40 is stored in the front part of the storage space 20b. The gear case 40 has an upper part in a worm case part 40a for storing the worm 41 and a lower part in a worm wheel case part 40b for storing the worm wheel 42, and the worm case part 40a is fitted into the seat side rail 22, The worm wheel case portion 40b is fitted into the rail 21 on the vehicle body side.

Fitting grooves 46 extending in the front-rear direction are formed on both sides 45 of the gear case 40.
Are formed. The projection 29 of the seat-side rail 22 is fitted into the fitting groove 46, and the gear case 40 is restrained against rattling on a plane orthogonal to the front-rear direction. A screw hole 47 is threaded on the upper surface of the gear case 40.
The gear case 40 is screwed to the ceiling portion 25 of the rail 22 on the seat side by one bolt 48 screwed to the screw 47.

A rear end portion of the screw member 31 is rotatably supported by a ceiling portion 25 of the seat-side rail 22 via a bearing member 39. Further, the front end portion of the screw member 31 is inserted into the gear case 40, and the ceiling portion 25 of the seat-side rail 22 is inserted through the gear case 40.
It is rotatably supported by.

At the front end of the screw member 31, a retaining nut 37 capable of preventing the screw member 31 from coming out backward is screwed. Similarly, a ring member 38 capable of abutting the rear surface of the gear case 40 and preventing the screw member 31 from moving forward is fitted to the front end portion of the screw member 31. The worm wheel 42 is integrally rotatably fixed to the front end of the screw member 31 inserted into the gear case 40.

A drive motor 60 is disposed between both rail units 20, and an output shaft 62 is provided so as to project from the drive motor 60 in both directions.
An insertion hole 26a is formed in the side wall 26 of the seat side rail 22,
The rotation shaft of the worm 41 protruding outward through the insertion hole 26a is connected to the output shaft 62. Worm 4 in the insertion hole 26a
The bearing member 63 for 1 is fitted.

Next, the operation will be described.

The holding groove 28 of the seat-side rail 22 on both side edge portions 27 of the vehicle-body-side rail 21 is fitted so that the seat-side rail 22 of the vehicle-body-side rail 21 is relatively movably fitted back and forth. deep.

Further, the screw member 31 is screwed into the nut member 32, and is meshed with the worm wheel in the gear case 40, and the drive unit 30 is assembled.

Next, the drive unit 30 previously assembled in the storage space 20b between the rail on the vehicle body side and the rail on the seat side is inserted from the front, for example.

As a result, the screw member 31 and the nut member 32 are fitted into the storage space 20b, and then the gear case 40 is fitted therein. At this time, attach the worm case 40 to the rail 21 on the vehicle body side.
b is fitted. Worm case part 4 on the seat side rail 22
0a comes to fit.

When inserting the drive unit 30 from the rear,
40 fits in. Then, the screw member 31 and the nut member 32 are fitted.

In addition, the projection 29 of the rail 22 on the seat side is fitted into the fitting groove 46 of the gear case 40, whereby it is restrained so that it cannot rattle on the plane orthogonal to the front-rear direction. At this time, the gear case 40 can move only in the front-rear direction.

Next, when the bolt 48 is screwed into the screw hole 47 of the gear case 40, the gear case 40 is fixed to the seat-side rail 22 in the front-rear direction so as not to rattle.

Next, while rotating the worm 41, the worm wheel 42 is engaged with the worm wheel 42 through the insertion hole 26a of the seat-side rail 22, and the output shaft 62 of the drive motor 60 is connected to the rotation shaft of the worm 41.

Front and rear, the nut member 32 is fixed to the rail 21 on the vehicle body side so that it cannot be moved back and forth by the stopper members 35 and 36.

When the drive motor 60 is started, the screw member 31 rotates via the output shaft 62 to the worm 41 to the worm wheel 42.

Since the nut member 32 is non-rotatably and immovably supported by the rail 21 on the vehicle body side, when the screw member 31 rotates, the screw member 31 is sent to the nut member 32 and gradually moves back and forth.

As a result, the seat-side rail 22 moves in the front-rear direction, and a seat (not shown) moves in the front-rear direction so that the position of the seat can be adjusted.

[Advantage of Invention] According to the power seat slide device of the present invention, the rail on the vehicle body side and the rail on the seat side are formed in a constant groove-shaped cross section, and the storage space between both rails is formed from the front-rear direction. In addition to fitting the drive part, when it was fitted, the gear case was constrained so that it could not rattle on a plane orthogonal to the front-rear direction, so both rails were made of a light metal material such as aluminum. It can be molded by extrusion method etc., it can be made lightweight, and after fitting the drive part,
It suffices to fix the gear case to one of both rails so that it cannot move back and forth with one screw or the like, which reduces the number of parts and the number of assembling steps to reduce the production cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is an exploded perspective view of a rail unit and the like, FIG. 2 is an exploded perspective view of a drive unit, and FIG. Similarly, FIG. 3 is a sectional view of a main part, and FIG. 4 shows a conventional example, and is an exploded perspective view of a rail unit and the like. 10 …… Vehicle floor 20 …… Rail unit 20a …… Power seat slide device 20b …… Storage space 21 …… Vehicle side rail 22 …… Seat side rail 29 …… Slit section 30 …… Drive section 31 …… Screw member 32 …… Nut member 40 …… Gear case 40a …… Worm case part 40b …… Worm wheel case part 41 …… Warm 42 …… Worm wheel 46 …… Mating groove 50 …… Bearing member 60 …… Drive motor

Claims (1)

[Scope of utility model registration request] 1. A vehicle body-side rail fixed to an installation site,
A rail unit having a seat-side rail for supporting a seat by being fitted to the rail on the vehicle-body side so as to be relatively movable back and forth, and the rail on the vehicle-body side and the seat-side rail via a drive unit by power. In a power seat slide device configured to move a rail relative to the front-rear direction to adjust a front-back position of a seat, the drive unit includes a worm case unit that accommodates a worm that is rotated by the power, and the worm. A worm wheel case portion for accommodating a meshing worm wheel has a gear case integrally formed in a vertical direction, and the gear case is arranged in a space between the vehicle body side rail and the seat side rail. One of the rails on the vehicle body side or the seat side rail is inserted into the worm case so that the worm case portion can be fitted into the rail. And the other rail is formed in a constant groove-shaped cross section so that the worm wheel case portion can be fitted therein, and extends in the front-rear direction in one of the groove wall of the one rail and both side portions of the gear case. A fitting groove is formed, and a ridge portion that is fitted into the fitting groove and restrains the gear case on the plane orthogonal to the front-rear direction so as to prevent rattling is provided on both sides of the groove wall of the one rail and the gear case. A power seat slide device characterized by being formed on the other side of the section.