WO2015194008A1

WO2015194008A1 - Seat slide device for vehicle

Info

Publication number: WO2015194008A1
Application number: PCT/JP2014/066308
Authority: WO
Inventors: 裕也金井
Original assignee: ジョンソンコントロールズテクノロジーカンパニ－; 裕也金井
Priority date: 2014-06-19
Filing date: 2014-06-19
Publication date: 2015-12-23
Also published as: CN106660468A; JPWO2015194008A1; JP6342489B2; CN106660468B

Abstract

This seat slide device (1) for a vehicle is equipped with: a movable rail (3) that is slidable along a fixed rail (2); main rollers (5) that are provided on both ends of the movable rail (3) in the longitudinal direction and capable of rolling on the bottom wall (6) of the fixed rail (2); and sub-rollers (8) that are provided on the movable rail (3) and capable of rolling on the top wall (4) of the fixed rail (2) in response to the movement of the movable rail (3). The circular arc of the portion of the bottom wall (6) of the fixed rail (2) facing a contact portion (5b) of the main roller (5) is formed larger in radius than the circular arc of the contact portion (5b).

Description

Vehicle seat slide device

The present invention relates to a vehicle seat slide device.

Patent Document 1 discloses a vehicle seat slide device related to the vehicle. The related vehicle seat slide device includes a fixed rail, a movable rail, and a roller. The fixed rail is formed in a substantially U-shaped cross section having a bottom wall and a top wall parallel to the bottom wall, and the left and right opening edges are bent inward in the opposing direction. The movable rail is provided with rollers that roll on the bottom wall at both ends in the longitudinal direction. The roller is slidably engaged with the fixed rail and slides along the fixed rail. The fixed rail is supported by the vehicle body. The movable rail supports the seat.

JP-A-8-127270

In the related vehicle seat slide device, the fixed rail is supported by the vehicle body. Therefore, when the dimensional accuracy of the vehicle body is not as designed, the fixed rail itself may be deformed by fixing the fixed rail to the vehicle body. Further, the dimensional accuracy of the movable rail itself and the fixed rail itself engaged with the fixed rail may not be as designed. In such a case, a load that is biased by the roller is applied to the movable rail engaged with the fixed rail, so that the movable rail may not slide smoothly with respect to the fixed rail. Furthermore, since the lock part that is operated to be freely disengaged from the plurality of lock holes formed in the fixed rail is always urged in the engagement direction, a reaction force is applied to the movable rail side through the lock part, There is a possibility that the movable rail is displaced from the fixed rail. In such a case, the surface pressure of the roller to the fixed rail increases, and the sliding resistance increases.

According to the present invention, even if the fixed rail and the movable rail are deformed in a state not designed, even if a reaction force applied to the lock portion is applied to the movable rail, the movable rail engaged with the fixed rail can slide smoothly. An object of the present invention is to provide a vehicle seat slide device.

According to an aspect of the present invention, a fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening, a U-shaped cross section perpendicular to the longitudinal direction, and a part of the fixed rail are disposed in the fixed rail. A movable rail that is movable along the fixed rail, and a contact portion that is independently provided in the lateral direction of the movable rail at both ends in the longitudinal direction of the movable rail and can roll on the bottom wall by the movement of the movable rail And a secondary roller provided at both ends in the longitudinal direction of the movable rail and capable of rolling the top wall of the fixed rail by movement of the movable rail, and a contact portion and a bottom wall contact portion; Each of the facing portions is formed in an arc shape having a central portion on the top wall side, and the vehicle seat slide device has a larger radius of the arc of the portion facing the contact portion of the bottom wall than the radius of the arc of the contact portion. Is the gist.

Further, a spring washer may be interposed between the main roller and the movable rail.

According to the above configuration, the radius of the arc of the portion where the bottom wall of the fixed rail faces the contact portion is made larger than the radius of the arc of the contact portion of the main roller. For this reason, even if the fixed rail and the movable rail are deformed in a state not designed, even if the reaction force applied to the lock part is applied to the movable rail, the main roller of the movable rail that rolls on the bottom wall of the fixed rail Because of the point contact, the movable rail can slide smoothly on the fixed rail.

FIG. 1 is a perspective view of a movable rail of a vehicle seat slide device according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view corresponding to the arrow AA shown in FIG. 1, such as the movable rail of FIG. 1 and a fixed rail incorporating the movable rail. FIG. 3 is a bottom view according to the arrow DA in FIG. FIG. 4 is a perspective view showing movable parts assembled to the movable rail of FIG. 1, with the movable rail omitted. FIG. 5 is a side view according to the arrow DB of FIG.

Even if the fixed rail and the movable rail are deformed in the state not designed, or the reaction force applied to the lock part is applied to the movable rail, the movable seat that engages with the fixed rail can slide smoothly. The object of providing an apparatus was realized by the following configuration. That is, a vehicle seat slide device includes a fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening, a U-shaped cross section perpendicular to the longitudinal direction, and a part of the fixed rail in the fixed rail. The movable rail can be moved along the fixed rail, and the movable rail can be rolled on the bottom wall by moving the movable rail. And a sub roller provided at both ends in the longitudinal direction of the movable rail and capable of rolling the top wall of the fixed rail by moving the movable rail. The contact part and the part facing the contact part of the bottom wall are each formed in an arc shape having a center part on the top wall side, and the radius of the arc of the part facing the contact part of the bottom wall from the radius of the arc of the contact part By enlarging, the contact portion and the bottom wall are always in point contact.

Hereinafter, a vehicle seat slide apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS. The vehicle seat slide device 1 includes a fixed rail 2, a movable rail 3,

main rollers

5 and 5, and a sub roller 8.

The fixed rail 2 is formed in a substantially U-shaped cross section, and is bent inward from the bottom wall 6,

side walls

15 and 15 erected on the upper side UP from both ends of the bottom wall 6, and the tops of the

side walls

15 and 15. Thus, the

top walls

4 and 4 are provided so as to be opposed to each other substantially parallel to the bottom wall 6. At the free ends of the

top walls

4, 4,

opening edges

2 a, 2 a are formed that define a gap (opening) through which a flat plate portion 3 d described later of the movable rail 3 can pass. At both ends of the bottom wall 6,

slope portions

6a, 6a having a substantially slope shape are provided. The

slope portions

6a, 6a have a concave portion having a circular arc shape (for example, a radius R1 of 25 millimeters) having a central portion on the upper side UP.

The movable rail 3 is extrusion-molded into a T-shaped portion 3a having a T-shaped inverted section and a side portion 3b connected to the T-shaped portion 3a and formed on the lower LWR of the T-shaped portion 3a. A well-known seat cushion frame (not shown) is coupled to a flat plate portion 3d extending to the upper side UP at the left and right center of the flange portion 3c of the T-shaped portion 3a of the movable rail 3. The side portion 3b of the movable rail 3, the flange portion 3c, and the lower LWR portion of the flat plate portion 3d are disposed in the fixed rail 2. The lower LWR portion of the flat plate portion 3d is slidable along the fixed rail 2 to the front side FR and the rear side RR in the

opening edges

2a and 2a of the fixed rail 2.

The

main rollers

5 and 5 are rotatably supported at both ends of the movable rail 3 in the longitudinal direction, that is, at the front FR and rear RR ends of the movable rail 3. More specifically, the

main rollers

5 and 5 are located in the

concave side portions

3e and 3e and the concave ceiling portion 3f formed at the ends of the front side FR and the rear side RR of the movable rail 3. Built from the hand direction. The

main rollers

5 and 5 are pivotally supported with respect to the movable rail 3 via pins 14 press-fitted into recesses 3j and 3j formed on the

side portions

3b and 3b of the movable rail 3. Between the

heads

5a and 5a of the

main rollers

5 and 5 and the

concave sides

3e and 3e of the movable rail 3, the

heads

5a and 5a are always urged away from the

concave sides

3e and 3e. Thus, the

main rollers

5 and 5 are pressed against each other at the

end portions

5c and 5c. The through hole 13 a of the spring washer 13 is supported by being penetrated by the pin 14. On the

heads

5a and 5a side of the

main rollers

5 and 5,

contact portions

5b and 5b protruding in a substantially inclined shape are provided. The

contact portions

5b and 5b have a convex portion having an arc shape (for example, a radius R2 of 20 millimeters) having a central portion on the upper side UP. Therefore, the

contact portions

5b and 5b are always in point contact with the

slope portions

6a and 6a of the bottom wall 6 formed on the fixed rail 2, and smoothly move on the

slope portions

6a and 6a by the movement of the movable rail 3. can do.

The

brackets

7 and 7 are both formed in a U-shaped cross section with the opening facing the upper side UP. The

side walls

7a and 7a of the

brackets

7 and 7 are inserted into through holes (not shown) formed in the side portions 3b of the movable rail 3 and through holes 7g formed in the bracket 7 so that the pins 10 are press-fitted to the side of the movable rail 3 It is supported so as to extend over the portion 3b. With such a configuration, both

brackets

7 and 7 are pivotally supported with respect to the movable rail 3 so as to be rotatable up and down.

The upper ends UP of the

brackets

7 and 7 are provided in pressure contact with each other so that the

levers

7c and 7c having a bow (depressed in the lower LWR) extend. The lever 7c is always pressed by the damper 11 attached to the movable rail 3 to the lower LWR indicated by the white arrow Y1 in FIG. That is, as shown in FIG. 5, the damper 11 always gives the

brackets

7 and 7 a clockwise rotational biasing force about the pin 10.

The sub-roller 8 is pivotally supported by the

brackets

7 and 7 via the

shaft portions

8a and 8a that are pivotally supported by through

holes

7f and 7f formed in the

other end portions

7e and 7e of the

brackets

7 and 7, respectively. , And can roll on the

top walls

4 and 4 of the fixed rail 2. The auxiliary roller 8 has one end 7d of the

brackets

7 and 7 constantly pressed against the lower LWR indicated by the white arrow Y1 in FIG. 5 by the damper 11, so that the top end of the auxiliary roller 8 is indicated by the black arrow Y2 in FIG. Always in pressure contact with the wall 4.

Escape portions

3 g and 3 g are formed on the side portion 3 b of the movable rail 3 so as to escape the auxiliary roller 8. The damper 11 includes a holding portion 11a held by the movable rail 3, and a main body portion 11b that presses one end portion 7d of the

brackets

7 and 7 from the upper side UP to the lower side LWR.

Projections

7h and 7h formed on the

levers

7c and 7c of the

brackets

7 and 7 engage with the recess 3h formed on the side 3b of the movable rail 3. Thereby, the movable rail 3 and the

brackets

7 and 7 are positioned.

The slide lock device 12 is engaged with and disengaged from a lock hole (not shown) of the fixed rail 2 by a shaft 12e pivotally supported by the movable rail 3, an operation lever 12a supported horizontally by the shaft 12e, and the operation lever 12a. A lock portion 12c that is moved, and a coil spring 12b that is engaged and supported by the flat plate portion 3d so as to bias the lock portion 12c in the engaging direction (biased in the direction of the white arrow F in FIG. 4); A shaft portion 12d supported by the lock portion 12c and a lever 12f connecting the shaft portion 12d and the shaft 12e are provided. The spring constant of the lever 7c of one bracket 7 arranged on the front side FR in the longitudinal direction of the movable rail 3 with respect to the slide lock device 12 is set to the rear side RR in the longitudinal direction of the movable rail 3 with respect to the slide lock device 12. By making it larger than the spring constant of the lever 7c of the other bracket 7 arranged, the vertical swing of the movable rail 3 is reduced. Further, the movable rail 3 can move back and forth smoothly even when the occupant is seated on a seat supported by the seat cushion frame. Further, the lever 7c can softly receive a rearward falling load applied to the seat back generated when the occupant leans against a well-known seat back (not shown) constituting the seat.

In this embodiment, the

slopes

6a, 6a at both ends of the bottom wall 6 of the fixed rail 2 have arc-shaped recesses with a radius R1, and the

contact portions

5b, 5b of the

main rollers

5, 5 are arc-shaped with a radius R2. It has a convex part. When the movable rail 3 is moved, the

contact portions

5 b and 5 b of the

main rollers

5 and 5 roll on the

slope portions

6 a and 6 a of the bottom wall 6. The radius R1 of the arc formed on the

slopes

6a, 6a is larger than the radius R2 of the arc formed on the

contact portions

5b, 5b. For this reason, the

slopes

6a and 6a of the bottom wall 6 of the fixed rail 2 and the

contact parts

5b and 5b of the

main rollers

5 and 5 of the movable rail 3 rolling on the

slopes

6a and 6a are in point contact. . As a result, even if the fixed rail 2 and the movable rail 3 are deformed in a state not designed, even if the reaction force applied to the lock portion 12c by the coil spring 12b is applied to the movable rail 3, the movable rail 3 Can slide smoothly.

According to the present embodiment, the

brackets

7 and 7 are always urged to rotate to the lower LWR because the

levers

7c and 7c are pressed by the dampers (biasing portions) 11, respectively. Therefore, the

auxiliary rollers

8 and 8 pivotally supported by the

brackets

7 and 7 are always in pressure contact with the

top walls

4 and 4 of the fixed rail 2. At the same time, the

main rollers

5 and 5 attached to the movable rail 3 are in contact with the

slopes

6 a and 6 a of the bottom wall 6 of the fixed rail 2. For this reason, there is no gap between the

auxiliary rollers

8 and 8 and the top wall 4 of the fixed rail 2, and noise is hardly generated. Therefore, the vehicle seat slide device 1 does not generate or hardly generates noise even when it receives vibration generated as the vehicle travels.

According to this embodiment, since the spring washer 13 is interposed between the

heads

5a and 5a of the

main rollers

5 and 5 and the movable rail 3, the fixed rail 2 and the movable rail 3 are deformed in a state not designed. Even so, since the

contact portions

5b and 5b of the

main rollers

5 and 5 of the movable rail 3 rolling on the

slopes

6a and 6a of the bottom wall 6 of the fixed rail 2 are point contacts, the fixed rail 2 is moved to the movable rail. 3 can slide smoothly.

Since the auxiliary roller 8 is pre-assembled to the bracket 7, the number of assembly steps in the assembly line such as the fixed rail 2 can be reduced. For this reason, the assembly work process of various members is simplified.

In the above description, the contact portion 5b of the main roller 5 is formed in a slope shape and makes point contact with the slope portions 6a at both ends of the bottom wall 6 of the fixed rail 2. However, the shape of the contact portion 5b and the portion of the bottom wall 6 that makes point contact with the contact portion 5b is not limited. For example, if the contact portion 5b forms a convex arc and the portion of the bottom wall 6 facing the contact portion 5b is a concave arc, the shape may not be inclined. Moreover, you may make point contact with the contact part 5b not in the both ends of the bottom wall 6, but in the center part side of the bottom wall 6. FIG.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

Claims

A fixed rail having a bottom wall and a top wall parallel to the bottom wall having an opening, and having a U-shaped cross section perpendicular to the longitudinal direction;
A movable rail partially disposed in the fixed rail and movable along the fixed rail;
A main roller having a contact portion that is provided independently in the short direction of the movable rail at both ends in the longitudinal direction of the movable rail and is capable of rolling on the bottom wall by the movement of the movable rail;
A sub-roller provided at both ends in the longitudinal direction of the movable rail, and capable of rolling the top wall of the fixed rail by the movement of the movable rail;
The contact portion and the portion of the bottom wall facing the contact portion are each formed in an arc shape having a central portion on the top wall side, and the radius of the arc of the facing portion is larger than the radius of the arc of the contact portion. A seat slide device for a vehicle characterized by being large.
2. The vehicle seat slide device according to claim 1, wherein a spring washer is interposed between the main roller and the movable rail.