KR102530211B1 - Sliding apparatus of seat for vehicle - Google Patents

Abstract

The present invention has a mounting area inside, an upper portion of the mounting area is formed to be open, a lower rail on which a pair of rack gears are disposed in the mounting area, and a lower rail to the mounting area through the open top of the lower rail An upper rail having a rolling member that is inserted and movable in the inserted state, coupled to the upper rail, and as the upper rail is inserted into the mounting area, it is engaged with the rack gear and is coupled to the length of the rack gear A lead screw module that moves forward and backward along the direction and is connected to the lead screw module, allows a driving force to be applied to the lead screw module through a driving transmission unit, and moves the upper rail by adjusting the driving force directed to the driving transmission unit. and a gear ratio module configured to correct the speed.

Description

Sliding device for vehicle seats {SLIDING APPARATUS OF SEAT FOR VEHICLE}

The present invention relates to a sliding device for a vehicle seat, and more particularly, to a vehicle seat that enables a seated person to move stably in the forward and backward directions by applying a gear structure that can operate smoothly regardless of the movement stroke of the seat. It is about the slide device.

Generally, a vehicle seat includes a seat back and a seat cushion, and a seat slide device is installed to slide the seat cushion in the front and rear directions of the vehicle body.

As for the slide device, a device configured to provide a relatively small forward and backward movement distance by installing a short slide device like a front seat has been widely used, but recently, RV vehicles, vans, etc. Due to the spread, research on a long slide device having a large adjustment width of the front and rear movement distance of the seat is being actively conducted.

The seat slide device as described above may be classified into a manual or electric seat slide according to its operation method. In the manual seat slide device, after the occupant lifts the lock release lever upward to adjust the seat position by the required distance, The position of the seat is fixed by returning the lock release lever downward.

In addition, the electric seat slide device is composed of a fixed rail fixed to the floor panel and a transport rail coupled to be slidably moved along the fixed rail and connected to the seat cushion, and the two transport rails are one It is configured to be driven by a slide motor.

That is, in the conventionally used electric seat slide device, shafts are provided on both sides of one slide motor, gear boxes installed in the transfer rail are connected to both ends of the shaft, and by rotation of the shaft, a worm shaft and a worm wheel in each gear box The nut is operated, following the lead screw installed on the fixed rail, and the transport rail is configured to move forward and backward.

However, as described above, in the case of a seat applied to an RV vehicle, a van, or an autonomous vehicle having a relatively long floor panel, when the lead screw method is applied as the moving stroke becomes longer, sagging may occur as the lead screw becomes longer. Accordingly, there is a problem that quality defects may increase due to vibration and noise of the gearbox.

An object of the present invention is to mount a pair of rack gears disposed facing each other inside the lower rail, while installing a lead screw module and a gear ratio module on the upper rail coupled to the lower rail, such that the lead screw module is a rack gear In the state of being coupled to, as the actuator is driven, the driving force is adjusted through the gear ratio module and applied to the lead screw module, so that the lead screw module rotates, sliding along the longitudinal direction of the rack gear inside the lower rail It is to provide a sliding device for a vehicle seat that enables a stable sliding movement regardless of the movement stroke of the seat by having a structure to do so.

The sliding device for a vehicle seat according to the present invention has a mounting area inside, an upper portion of the mounting area is formed to be open, and a lower rail in which a pair of rack gears are disposed in the mounting area, the lower rail is open An upper rail inserted into the mounting area through the top and having a rolling member to be movable in the inserted state, coupled to the upper rail, and as the upper rail is inserted into the mounting area, meshes with the rack gear A lead screw module that is coupled and moves in the forward and backward directions along the longitudinal direction of the rack gear and is connected to the lead screw module, and allows driving force to be applied to the lead screw module through a drive transmission unit and adjusting the driving force directed to the drive transmission unit. It is characterized in that it comprises a gear ratio module formed to correct the moving speed of the upper rail through.

Here, the lower rail is formed by dividing the upper portion of the first mounting guide and the first mounting guide for guiding mounting so that both ends of the rolling member are disposed in a constrained state inside, and the racks are inside each facing each other A second mounting guide for guiding a mounting position to mount the gear is provided.

The rack gear is provided as a first rack gear and a second rack gear respectively mounted along the longitudinal direction on one side and the other side of the second mounting guide, and the first rack gear and the second rack gear are different from each other. It is formed of a tooth shape and a material and engages with the lead screw module.

Meanwhile, the lead screw module includes a lead screw engaged with the rack gear and a connection pulley connected to the lead screw and configured to rotate the lead screw by transmitting a driving force applied through the drive transmission unit to the lead screw.

In addition, the gear ratio module includes an actuator that generates driving force of the motor as power is applied, a first transmission gear connected to the motor, provided in plurality to be engaged with each other, and corrected and transmitting the driving force generated from the motor, and and a second transmission gear engaged with the first transmission gear and applying the driving force transmitted from the first transmission gear to the drive transmission unit.

In the present invention, a pair of rack gears disposed facing each other are mounted on the inside of the lower rail, while a lead screw module and a gear ratio module are installed on the upper rail coupled to the lower rail, and the lead screw module is coupled to the rack gear In the state in which the actuator is driven, the driving force is adjusted through the gear ratio module and applied to the lead screw module, so that the lead screw module rotates and slides along the longitudinal direction of the rack gear inside the lower rail Structure By having, it has the effect of enabling stable sliding movement regardless of the movement stroke of the seat.

In addition, compared to the conventional structure in which the lead screw slides along a lead screw having a predetermined length, the present invention can prevent the lead screw from sagging caused by the lengthening of the moving stroke of the sheet. It has an effect of improving vibration and noise caused by screw deflection.

1 and 2 are views showing the structure of a sliding device for a vehicle seat according to an embodiment of the present invention.
3 is a view for showing a combination of a lower rail and an upper rail for a sliding device for a vehicle seat according to an embodiment of the present invention.
4 is a view for showing a rack gear for a sliding device for a vehicle seat according to an embodiment of the present invention.
5 is a view for showing an upper rail for a sliding device for a vehicle seat according to an embodiment of the present invention.
FIG. 6 is a view showing coupling of a lead screw module and a gear ratio module to a sliding device for a vehicle seat according to an embodiment of the present invention.
7 is a cross-sectional view A-A' of FIG. 6 for showing a gear ratio module of a sliding device for a vehicle seat according to an embodiment of the present invention.
8 is a B-B' cross-sectional view of FIG. 6 for showing a gear ratio module of a sliding device for a vehicle seat according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited by the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims.

In addition, in the description of the present invention, if it is determined that related known technologies may obscure the gist of the present invention, a detailed description thereof will be omitted.

1 and 2 are views showing the structure of a sliding device for a vehicle seat according to an embodiment of the present invention, and FIG. 3 is a lower rail and an upper rail for a sliding device for a vehicle seat according to an embodiment of the present invention. It is a drawing to show the combination of

4 is a view for showing a rack gear for the sliding device for a vehicle seat according to an embodiment of the present invention, and FIG. 5 is a view showing an upper rail for the sliding device for a vehicle seat according to an embodiment of the present invention. It is a drawing for

In addition, FIG. 6 is a view showing a coupling of a lead screw module and a gear ratio module to a sliding device for a vehicle seat according to an embodiment of the present invention, and FIG. 7 is a view of a sliding device for a vehicle seat according to an embodiment of the present invention. A-A' cross-sectional view of FIG. 6 for showing a gear ratio module, and FIG. 8 is a B-B' cross-sectional view of FIG. 6 for showing a gear ratio module of a sliding device for a vehicle seat according to an embodiment of the present invention.

As shown in FIGS. 1 and 2 , the sliding device for a vehicle seat according to the present embodiment includes a lower rail 100 , an upper rail 200 , a lead screw module 300 and a gear ratio module 400 .

The lower rail 100 has a mounting area therein, and an upper portion of the mounting area is opened so that the upper rail 200 can be inserted and mounted therein.

These lower rails 100 have a predetermined length, are arranged side by side with each other, and can be protruded and coupled to a position where a seat is mounted on the floor of the vehicle interior, but are of a hidden type, so that they are not exposed to the outside from the floor. It can also be combined internally.

Here, the lower rail 100 may include a first mounting guide 110 and a second mounting guide 120 as shown in FIG. 4 .

The first mounting guide 110 guides the mounting so that both ends of the rolling member 210 coupled to the upper rail 200 are placed in a constrained state therein.

In addition, in the first mounting guide 110, when the lower rail 100 and the upper rail 200 are coupled, the coupled rolling member 210 is coupled and mounted in a state in which play is minimized by the retainer 212. When this is done, it is formed to bind the retainer 212 through the bent end 112 and guide the mounting position (see FIG. 2).

The second mounting guide 120 is partitioned and formed on the upper portion of the first mounting guide 110, and is mounted so that the rack gear 10 for interlockingly engaging with the lead screw module 300 is mounted inside each facing each other. guide the location.

Preferably, the rack gear 10 is composed of a first rack gear 12 and a second rack gear 14 mounted along the longitudinal direction on one side and the other side of the second mounting guide 120, respectively. The first rack gear 12 and the second rack gear 14 may be formed of different tooth shapes and materials.

That is, the first rack gear 12 is mounted on one side of the second mounting guide 120, the first rack gear 12 is made of steel, and the second mounting guide 120 has a second rack gear 12 on the other side. The rack gear 14 is mounted, and the second rack gear 14 is made of an injection-molded plastic material.

In addition, in the case of the second rack gear 14, compared to the first rack gear 12, it may be formed to have a relatively large tooth profile, which means that the lead screw module 300 is the first rack gear 12 And in the sliding movement of the upper rail 200 in the engaged state with the second rack gear 14, this is to operate advantageously emotionally and at the same time to ensure strength in the event of an impact.

In other words, if the first rack gear 12 and the second rack gear 14 are made of the same steel material as the lead screw 310, when the upper rail 200 slides, the collision occurs. Noise and damage may also occur. Accordingly, the first rack gear 12 is made of steel and the second rack gear 14 is made of an injected plastic material, thereby preventing the above problems in advance. It can be prevented.

In addition, the first rack gear 12 and the second rack gear 14 are formed with different tooth shapes, specifically, the second rack gear 14 has a larger tooth profile than the first rack gear 12. Therefore, when the lead screw 310 slides due to rotation of the lead screw 310, the lead screw 310 flows and moves within the second rack gear 14, and operates in an emotionally advantageous manner. Since the lead screw 310 comes into contact with the relatively small toothed first rack gear 12, strength can be guaranteed.

On the other hand, the upper rail 200 is coupled to the lower part of the seat, and as shown in FIG. 3, the upper rail 200 is inserted into the mounting area through the open top of the lower rail 100, and thus inserted A pair of rolling members 210 are disposed at the bottom so that sliding movement is possible in the state of being (see FIG. 5).

As shown in FIG. 5 , an installation area A for coupling the lead screw module 300 is opened and formed inside the upper rail 200 .

Accordingly, the lead screw module 300 is coupled to the open installation area A and protrudes to one side and the other side of the upper rail 200, and as the upper rail 200 is inserted into the mounting area, one and the other side and The other side is engaged with the first rack gear 12 and the second rack gear 14, respectively, and eventually moves in the forward and backward directions along the longitudinal direction of the rack gear 10 to guide the sliding movement of the upper rail 200. do.

To this end, the lead screw module 300 includes a lead screw 310 and a connection pulley 320 as shown in FIG. 5 .

The lead screw 310 is installed inside the housing 300a, and a screw thread is formed on its outer circumferential surface to engage and engage with the rack gear 10.

In addition, the connection pulley 320 is connected to the lead screw 310 and transmits the driving force applied from the motor 412 to the lead screw 310 through the drive transmission unit 500, thereby reducing the loss of the lead screw 310. rotation is made.

Here, the drive transmission unit 500 is provided with a connecting belt 510 having a predetermined length to connect the connecting pulley 320 and the rotating shaft and the rotating shaft 400b of the gear ratio module 400, respectively. Accordingly, the gear ratio module ( When the driving force is adjusted and transmitted through 400), the adjusted driving force is transmitted to the connecting pulley 320 through the connecting belt 510, and eventually the lead screw 310 for the sliding movement of the upper rail 200 to make the rotation

Preferably, the drive transmission unit 500 extends with a predetermined length, and the connecting belt 510 is also formed to extend with a predetermined length. As described above, if the lower rail 100 is a hidden type When combined, the upper rail 200 including the lead screw module 300, the gear module 400, and the drive transmission unit 500 is disposed and operated while being spaced apart from the floor of the vehicle interior. This is to enable the upper rail 200 to be coupled to the lower rail 100 disposed inside the bottom surface of the vehicle by ensuring the length of the drive transmission unit 500 to correspond.

The gear ratio module 400 is connected to the lead screw module 300, and allows driving force to be applied to the lead screw module 300 through the driving transmission unit 500, and at this time controls the driving force directed to the driving transmission unit 500. It is formed to correct the conveying speed of the upper rail 200 through.

To this end, the gear ratio module 400 includes an actuator 410, a first transmission gear 420 and a second transmission gear 430, as shown in FIGS. 7 and 8 .

The actuator 410 is for generating thrust for the motor 412 disposed therein, and is fixedly disposed on one surface of the upper rail 200.

The first transmission gear 420 is disposed inside the main body 400a, is connected to the motor 412, and is provided in plurality to mesh with each other.

Since the plurality of first transmission gears 420 are interdigitated with each other along the upper and lower portions, the driving force generated from the motor 412 is not directly transmitted to the drive transmission unit 500, but the plurality of first transmission gears ( 420) and the second transmission gear 430, so that it is transmitted in a state where the driving force is corrected.

The number of the first transmission gears 420 is not fixed, and may be added to more precisely correct the driving force applied from the motor 412 .

In addition, the second transmission gear 430 is engaged with the first transmission gear 420 inside the main body 400a, and applies the driving force transmitted from the second transmission gear 420 to the drive transmission unit 500 play a role

In this way, the driving force generated from the motor 412 is corrected to a predetermined level through the gear ratio module 400 including the plurality of first transmission gears 420 and the second transmission gears 430 to the lead screw module 300. By allowing the seated person to control the movement of the seat, sudden sliding movement is prevented, that is, the seated person can move emotionally and advantageously, and accordingly, the seated person can safely adjust the seat.

In the present invention, a pair of rack gears disposed facing each other are mounted on the inside of the lower rail, while a lead screw module and a gear ratio module are installed on the upper rail coupled to the lower rail, and the lead screw module is coupled to the rack gear In the state in which the actuator is driven, the driving force is adjusted through the gear ratio module and applied to the lead screw module, so that the lead screw module rotates and slides along the longitudinal direction of the rack gear inside the lower rail Structure By having, it has the effect of enabling stable sliding movement regardless of the movement stroke of the seat.

In addition, compared to the conventional structure in which the lead screw slides along a lead screw having a predetermined length, the present invention can prevent the lead screw from sagging caused by the lengthening of the moving stroke of the sheet. It has an effect of improving vibration and noise caused by screw deflection.

The present invention has been described above with reference to the embodiment (s) shown in the drawings, but this is only exemplary, and various modifications can be made thereto by those skilled in the art, and the above-described embodiments It will be appreciated that all or part of (s) may be configured in selective combinations. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

10: rack gear 12: first rack gear
14: second rack gear 100: lower rail
110: first mounting guide 120: second mounting guide
200: upper rail 210: rolling member
212: retainer 300: lead screw module
300a: housing 310: lead screw
320: connection pulley 400: gear ratio module
400a: body 400b: rotation shaft
410: actuator 412: motor
420: first transmission gear 430: second transmission gear
500: drive transmission unit 510: connecting belt

Claims (5)

a lower rail having a mounting area therein, an upper portion of the mounting area being open, and a pair of rack gears disposed in the mounting area;
an upper rail inserted into the mounting area through an open top of the lower rail and having a rolling member to be movable in an inserted state;
a lead screw module coupled to the upper rail and engaged with the rack gear to move forward and backward along the longitudinal direction of the rack gear as the upper rail is inserted into the mounting area; and
A gear ratio module connected to the lead screw module, configured to allow driving force to be applied to the lead screw module through a driving transmission unit, and to correct a moving speed of the upper rail through adjustment of driving force directed to the driving transmission unit; ,
The lower rail,
A first mounting guide for guiding the mounting so that both ends of the rolling member are placed in a constrained state therein; and
A second mounting guide formed on the upper portion of the first mounting guide and guiding a mounting position so that the rack gear is mounted inside each facing each other;
The rack gear,
It is provided with a first rack gear and a second rack gear respectively mounted along the longitudinal direction on one side and the other side of the second mounting guide,
The sliding device for a vehicle seat, characterized in that the first rack gear and the second rack gear are formed of different teeth and materials and engaged with the lead screw module.
delete delete According to claim 1,
The lead screw module,
a lead screw engaged with the rack gear; and
A sliding device for a vehicle seat, characterized in that it comprises a connection pulley connected to the lead screw and transmitting the driving force applied through the drive transmission unit to the lead screw to make rotation.
According to claim 1,
The gear ratio module,
an actuator generating a driving force of the motor as power is applied;
first transmission gears connected to the motor, provided in plurality to be engaged with each other, and configured to correct and transmit driving force generated from the motor; and
A sliding device for a vehicle seat, characterized in that it comprises a second transmission gear engaged with the first transmission gear and applying the driving force transmitted from the first transmission gear to the drive transmission unit.

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