KR102234643B1 - Seat Track Structure for Vehicle - Google Patents

Abstract

The present invention relates to a seat track structure for a vehicle preventing vibrations and noises from a seat track when a seat moves. The seat track comprises: a lower rail; a lead screw coupled to a front bracket and a rear bracket, and installed on the lower rail to be installed in the longitudinal direction of the lower rail; an upper rail slidably installed on the lower rail; and a gearbox including a gearbox housing, a middle bracket, and a guide bush, wherein the gearbox housing moves back and forth along the lead screw and is installed such that a worm shaft crosses a worm wheel nut at a right angle, the middle bracket supports the gearbox housing and is coupled to the upper rail, and the guide bushing is disposed between the gearbox housing and the middle bracket to block the movement of the gearbox housing.

Description

Seat Track Structure for Vehicle {Seat Track Structure for Vehicle}

The present invention relates to a seat track structure for a vehicle, and more particularly, to a seat track structure for a vehicle that prevents vibration and noise from being generated from the seat track when the seat is moved.

In general, a seat of a vehicle includes a seat back and a seat cushion, and a slide device of a seat track is installed so that the seat cushion can slide in the front and rear direction of the vehicle body.

As shown in FIG. 1, the seat track 50 includes a lower rail 10 fixedly installed on a floor panel of a vehicle, and an upper rail 30 coupled to slide along the lower rail 10 and on which a seat is installed, It is configured to include a gearbox 40 that is fixed to the upper rail 30 and moves in the front and rear directions by riding the leadscrew 20 installed on the lower rail 10 by a driving means.

The gearbox 40 includes a gearbox housing 41 installed by interlocking a worm shaft and a worm wheel nut in an orthogonal state, and a mid bracket 42 coupled to the upper rail 10 while supporting the gearbox housing 41. ), and when the worm shaft is rotated by the flexible shaft connected to the driving means, the worm wheel nut coupled to the lead screw rotates interlockingly and moves the gearbox 40 on the lead screw 20 in the front and rear directions.

However, the conventional seat track 50 configured as described above has a problem that adversely affects the quality of sensibility in pursuit of comfort and comfort.

That is, noise and vibration are generated due to distortion of the mid bracket 42 of the gear box 40 or the gear box housing 41.

First, when the upper rail 30 of the gearbox 40 is coupled, when either side of both sides of the mid bracket 42 is first fastened to the upper rail 30 by the coupling bolt, the mid bracket along the fastening direction of the coupling bolt Since the coupling of the other side is made in a state where the distortion of 42 is made minutely, in the end, there is a different distortion between the worm wheel nut and the lead screw 20 inside the gearbox housing 41 due to the distortion of the mid bracket 42 The stress acts, causing noise and vibration.

Second, when the gearbox 40 moves forward or backward through the lead screw 20, the worm shaft installed inside the gearbox housing 41 rotates by the flexible shaft, and the worm wheel nut rotates when the worm wheel nut rotates. At the time of completion, the rotational force is strongly transmitted, and in this process, the warp of the worm wheel nut is made minutely, and at the same time, the gearbox housing 41 in which the worm wheel nut is installed is also warped. At this time, between the mid bracket 42 and the gear box housing 41, a fixing member 43 of high material quality is interposed between the gearbox housing 41 to prevent the flow of the gearbox housing. 41), it cannot handle the twisting force and is pressed, so it cannot perform its function.

When the gearbox housing 41 is twisted in this way, the axis of the worm wheel nut and the axis of the leadscrew 20 are twisted, resulting in a twisting stress between the worm wheel nut and the threads of the leadscrew 20, and the gearbox 40 Local noise and vibration are generated by the occurrence of overload friction between the worm wheel nut and the lead screw 20 as soon as it moves in the other direction after the complete movement in one direction is made, and the noise is caused by the left side of the gearbox 40. Whenever the right movement transition is made, it occurs repeatedly.

Third, the upper rail 30 is also twisted by the twisting of the gearbox 40, causing contact between the upper rail 30 and the lower rail 10, which causes noise and vibration when the gearbox 40 moves. There is a problem.

Fourth, a space bush 23 having a predetermined length limiting the movement of the gearbox moving forward and backward is provided at the frontmost point and the rearmost point of the lead screw 20, and the front end of the space bushing 23 A rubber bushing 24 for absorbing impact by colliding with the gearbox 40 according to the set moving distance of the gearbox 40 is disposed.

However, in the process of absorbing the impact of the gearbox 40, the rubber bush 24 makes continuous surface contact with the one surface of the gearbox 40, so at a certain moment the gearbox is caused by the grease applied to the leadscrew 20. (40) It sticks to one side and moves together with the gearbox 40, and the moving rubber bush 24 contacts the threads of the leadscrew 20, thereby causing noise and vibration.

Domestic registered patent No. 0461321

The present invention was conceived to solve the above problems and technical biases, and by preventing vibration and noise from occurring from each structure of the seat track when the seat is moved in the forward and backward directions, the emotional quality without vibration and noise during the movement of the seat is achieved. Its purpose is to provide a seat track structure for automobiles that can achieve this.

The seat track structure for a vehicle of the present invention for achieving the above object, the seat track, the lower rail; A lead screw coupled to the front bracket and the rear bracket installed on the lower rail and installed in the longitudinal direction of the lower rail; An upper rail slidably installed on the lower rail; And a gearbox housing in which a worm shaft and a worm wheel nut are orthogonally installed therein while moving forward and backward by riding the lead screw, a middle bracket supporting the gearbox housing and coupled to the upper rail, and the gearbox. It is configured to include; a gearbox consisting of a guide bush, which is interposed between the housing and the middle bracket to block the flow of the gearbox housing.

In this case, the middle bracket includes a seating portion on which the gearbox housing is seated in a state in which the lead screw passes, and a pair of coupling portions extending from both sides of the seating portion and coupled to the upper rail through coupling bolts, , Alignment embossing is formed to protrude so that the straightness of the middle bracket can be ensured when it is coupled to an upper rail, and a receiving groove for receiving the alignment embossing is formed on the upper rail, When the middle bracket is coupled to the upper rail, it is preferable that the straightness of the gearbox coincide with the lead screw direction.

In addition, the guide bush may include a pair of partition walls each having a through hole through which the lead screw passes, and interposed between the gear box housing and the middle bracket; A pair that extends perpendicularly to the partition wall at both ends of the partition wall and accommodates a portion of the gear box housing and the middle bracket on one side and the other side of the partition wall while simultaneously supporting both outer surfaces of the gear box housing and the middle bracket Support piece; And a connecting piece for connecting the partition wall and the support piece.

In this case, the guide bush is preferably made of any one of ABS, FRP, or engineer plastic.

In addition, at both ends of the leadscrew coupled to the front bracket and the rear bracket, a set movement in the front and rear directions is made when the gearbox moves on the leadscrew, and when the gearbox reaches the set point, a collision occurs. It is preferable that a space damper that absorbs impact is provided.

In this case, the space damper is preferably composed of a body having a predetermined length and a plurality of slots formed to be spaced apart along the longitudinal direction of the body and having a predetermined space for absorbing an impact when the gearbox collides.

In addition, it is preferable that the space damper is a Teflon that has a predetermined elasticity and does not change physical properties against repeated impacts.

In addition, it is preferable that the front bracket and the rear bracket are formed with a bent front fastening piece and a rear fastening piece through which the lead screw passes, and a loosening prevention nut is fastened to the lead screw passing through the fastening piece.

Meanwhile, a shaft connected to a driving motor is inserted into the gearbox housing of the gearbox, and the shaft is composed of an outshaft having a predetermined length and an inner shaft whose length is variable by being inserted into the outshaft, and the outshaft and The outer circumferential surface of the inner shaft is formed to pass through a plurality of fastening holes at positions corresponding to each other, and the fastening hole is a spring shape that is inserted into at least one fastening hole while surrounding the outer circumference of the outer shaft to fix the retracted state of the inner shaft It is preferable that the stopper is fastened.

Finally, it is preferable that the outer shaft and the inner shaft are made of SUS.

According to the vehicle seat track structure of the present invention having the configuration as described above,

First, by fixing both sides of the mid bracket when the gearbox is coupled to the upper rail, it prevents rotation in the tightening rotation direction of the coupling bolt when the mid bracket is fastened through the coupling bolt, and thereby prevents distortion of the gearbox. It has an excellent effect of preventing vibration and noise from occurring.

Second, the anti-torsion member is interposed between the mid bracket and the gearbox housing to support the outer surfaces of both sides of the midbracket gearbox housing, thereby blocking distortion of the gearbox housing when the gearbox is moved, thereby preventing vibration and noise from occurring. Do.

Third, since distortion of the gearbox is prevented, unnecessary contact between the upper rail and the lower rail is not made, so that vibration and noise are not generated.

Fourth, by fixing a single space damper to each of the front bracket and rear bracket to completely absorb the shock of the gearbox reaching the point of movement of Max, it prevents vibration and noise from occurring due to the rubber bush as in the prior art. There is this.

Fifth, there is an effect of ensuring the safety of the occupant as the separation of the lead screw and the rear bracket is prevented in the event of a front collision of the vehicle.

Sixth, by forming the shaft made of SUS material, even if the shaft has a predetermined length, warping does not occur, and the length is variable so as to facilitate assembly.

1 is a cross-sectional perspective view of a main part showing a conventional seat track structure,
2 is a perspective view showing a seat track for a vehicle according to the present invention,
3 is a perspective view showing a single seat track in the configuration of the seat track for a vehicle according to the present invention,
Figure 4 is an exploded perspective view of Figure 3,
Figure 5 is a cross-sectional perspective view of the main part of Figure 3,
Figure 6 is an exploded perspective view of the main parts of the gearbox in the configuration of the seat track according to the present invention,
7 is a plan view showing a partial cross-sectional view of the guide bush of the gearbox of FIG. 6;
8 is a front view showing a state in which the gearbox of FIG. 6 moves,
9 is a reference diagram showing a process in which a shaft is inserted into a gearbox in the construction of a seat track for a vehicle according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The present embodiments are provided to explain the present invention in more detail to those of ordinary skill in the art to which the present invention pertains. Therefore, the shape of each element shown in the drawings may be exaggerated to emphasize a more clear description.

Terms such as first and second may be used to describe various components, but the components should not be limited by terms. The terms are used only for the purpose of distinguishing one component from other components.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Figure 2 is a perspective view showing a seat track for a vehicle according to the present invention, Figure 3 is a perspective view showing a single seat track in the configuration of the seat track for a vehicle according to the present invention, Figure 4 is an exploded perspective view of Figure 3 5 is a cross-sectional perspective view of the main parts of FIG. 3, FIG. 6 is an exploded perspective view of the main parts of the gearbox in the configuration of the seat track according to the present invention, and FIG. 7 is a partial cross-sectional plan view of the guide bush of the gearbox of FIG. 6, FIG. 8 is a front view showing a state in which the gearbox of FIG. 6 moves, and FIG. 9 is a reference view showing a process in which the shaft is inserted into the gearbox during the construction of the seat track for a vehicle according to the present invention.

2 to 9, in the structure of the seat track 600 for a vehicle of the present invention, the seat track 500 includes a lower rail 100; A lead screw 200 installed in the longitudinal direction of the lower rail 100 by being coupled to the front bracket 210 and the rear bracket 220 installed on the lower rail 100; An upper rail 300 slidably installed on the lower rail 100; And a gearbox housing 410 in which a worm shaft and a worm wheel nut are installed orthogonally, and the upper rail ( A gearbox consisting of a middle bracket 420 coupled to 300, a guide bush 430 interposed between the gearbox housing 410 and the middle bracket 420 to block the flow of the gearbox housing 410, 400); includes.

Prior to the description, the greatest feature of the seat track 600 for a vehicle according to the present invention is to improve the coupling state between each structure constituting the seat track 500, so that the transfer of the seat (not shown) coupled to the seat track 500 ,It is to improve the emotional quality by fundamentally blocking the generation of vibration and noise when moving backward.

The seat track 600 for a vehicle of the present invention is configured to form a pair with two seat tracks 500 spaced apart as shown in FIG. 2, and a driving motor M is provided between the two seat tracks 500. The shaft 150 is inserted into the gearbox housing 410 of each seat track 500 and transmits rotational force to the gearbox housing 410 on both sides of the drive motor.

The shaft 150 in the present invention has a structure in which the length is variable, and the structure will be described later.

In addition, in the seat track 600 for an automobile of the present invention, two seat tracks 500 are combined in an upward direction on the drawing in a state in which two seat tracks 500 form a pair, and since the seat tracks 500 have the same structure, hereinafter, a single Only the structure of the seat track 500 will be described.

The lower rail 100 is fixed to the floor panel forming the interior of the vehicle, and maintains a predetermined length toward the front and rear directions of the vehicle.

The lower rail 100 has a bending portion (not shown) that is combined with the upper rail 300 to be described later as shown in FIGS. 3 to 5 to allow the upper rail 300 to slide, and the upper rail 300 also corresponds A bending part (unsigned) is formed.

Accordingly, the lower rail 100 supports the leadscrew 200 and the upper rail 300 to be described later, thereby supporting the sheet coupled to the upper rail 300.

The lead screw 200 is helically coupled with a worm wheel nut (not shown) installed inside the gear box 400 to be described later, so that the gear box 400 can be moved by rotation of the worm wheel nut, as shown in FIG. 5. Likewise, it is installed inside the lower rail 100.

Inside the lower rail 100, a front bracket 210 and a rear bracket 220 are installed in a state spaced apart along the length direction, and both ends of the lead screw 200 have a front bracket 210 and a rear bracket 220, respectively. ) Is installed inside the lower rail 100 by being coupled to it.

At this time, the front fastening pieces 211 toward the leadscrew 200 as shown in FIGS. 4 and 5 so that the fastening force of the leadscrew 200 coupled to the front bracket 210 and the rear bracket 220 can be increased. And the rear fastening piece 221 is formed to be bent, and both ends of the lead screw 200 passing through the front fastening piece 211 and the rear fastening piece 221 are fastened with anti-loosening nuts, respectively.

At this time, since the anti-loosening nut 240 is in close contact with the front fastening piece 211 or the rear fastening piece 221 at the same time as the angles are fastened to both ends of the leadscrew 200, the leadscrew 200 and the front bracket 210 And it increases the fastening force of the rear bracket 220.

The coupling structure of the lead screw 200, the front bracket 210, and the rear bracket 220 as described above is a conventional structure fixed to the rear bracket 220 by welding, the rear bracket 220 in the event of a front collision of the vehicle. It solves the problem that human accidents occur as the lead screw 200 welded to falls off. In particular, it solves the problem that the fastening force between the lead screw 200 and the rear bracket 220 is deteriorated due to the formation of fine cracks due to numerous vibrations caused by welding conditions or long-term use of the welding area.

Moreover, as the fastening force on both sides of the leadscrew 200 increases, that is, even if the vehicle collides in the front or rear, the lead screw 200 is prevented from being disengaged from the seat. It will further promote the safety of the company.

In addition, as in the prior art, there is an effect that the welding equipment for welding the rear bracket 220 and the leadscrew 200, cost reduction and productivity are shaped.

On the other hand, at both ends of the leadscrew 200 coupled to the front fastening piece 211 of the front bracket 210 and the rear fastening piece 221 of the rear bracket 220, respectively, a gearbox 400 to be described later is a lead screw. A space damper 230 is provided for absorbing impact when a collision occurs when the gearbox 400 reaches the set point while making a set movement in the forward and backward directions when moving on the 200.

That is, the space damper 230 is disposed at different lengths at the front ends of the front bracket 210 and the rear bracket 220 to which the leadscrew 200 is coupled, as shown in FIGS. 4 and 5, and the gearbox 400 It is to limit the set distance for movement in the forward and backward directions.

The space damper 230 has a cylindrical body 231 having a predetermined length for limiting the moving distance of the gear box 400, and is formed to be spaced apart along the longitudinal direction of the body 231 and collides with the gear box 400 It is composed of a plurality of slots 232 having a predetermined space toward the center from the outer peripheral surface of the body 231 in order to absorb the shock.

The space damper 230 as described above allows the shock applied when the gearbox 400 collides to be absorbed in the space of the plurality of slots 232 formed in the space damper 230, thereby reducing the deformation of the outer shape of the gearbox 400. Prevent (see Fig. 8).

In addition, the space damper 230 is preferably a Teflon having a predetermined elasticity and no change in physical properties for repeated impacts, which has elasticity to absorb the repeated impacts of the gearbox 400 and is pressed due to the impact. This is to ensure that the original shape can be preserved at all times by making sure that there is no change in the physical properties of

In the present embodiment, it is described that the material of the space damper 230 is Teflon, but the type of material is not limited as long as there is no change in physical properties due to impact and has a predetermined elasticity.

Therefore, the space damper 230 limits the movement distance before and after the gearbox 400, and allows the primary impact to be absorbed through the space of the plurality of slots 232 when the gearbox 400 collides, and the slot By allowing the secondary impact through 232 to be absorbed through the material of the space damper 230, the gearbox 400 is stably protected, and durability is increased because a separate rubber bush for impact is not required as in the prior art. .

The upper rail 300 is to enable movement of the seat coupled to the upper side in the front and rear directions, and is slidably installed on the lower rail 100.

At this time, the upper rail 300 maintains a predetermined length so that the seats can be coupled, and the cross-sectional shape maintains a'∩' shape as a whole so that the gearbox 400, which will be described later, can be coupled to be accommodated inward. have.

In addition, a receiving groove 300a in which the alignment emboss 425 of the middle bracket 420 is accommodated is formed on the upper surface of the gearbox 400 to be described later. A plurality of holes to be fastened are formed.

The gearbox 400 is to move in the front and rear directions while riding on the leadscrew 200 installed on the lower rail 100 as shown in FIGS. 4 to 8 to move the seat coupled to the upper side. It includes 410 and a middle bracket 420 and a guide bush 430.

Inside the gearbox housing 410, the worm shaft (not shown) rotates by being connected to the shaft 150 that is connected to the drive motor (M) to provide rotational force, and the worm in a state in which the worm is helically coupled to the lead screw (200). A worm wheel nut (not shown) that is installed perpendicular to the shaft and rotates interlockingly by the rotation of the worm shaft and moves along the leadscrew 200 is installed.

That is, the gearbox housing 410 moves forward and backward while riding the leadscrew 200 through rotation of a worm shaft and a worm wheel nut installed therein.

The middle bracket 420 is coupled to the upper rail 300 while supporting the gearbox housing 410, and when the middle bracket 420 is coupled to the upper rail 300, the straightness of the gearbox 400 is a lead screw. A shape corresponding to the outer shape of the gearbox housing 410 so that the gearbox housing 410 can be seated in a state where the leadscrew 200 penetrates as shown in FIGS. 5 and 6 It includes a seating portion 421 having a, and a pair of coupling portions 423 extending in a predetermined length outward from both sides of the seating portion 421 and coupled to the upper rail 300 through coupling bolts.

In this case, an alignment emboss 425 is formed to protrude on the upper surface of each of the coupling portions 423 so as to ensure the straightness of the middle bracket 420 when coupled through the inner side of the upper rail 300.

In addition, a receiving groove 300a in which the alignment emboss 425 is accommodated is formed in the upper rail 300 in which the alignment emboss 425 of the coupling portion 423 is located.

In this case, when the middle bracket 420 is coupled to the upper rail 300, since the two alignment embosses 425 are fitted into the receiving groove 300a, the middle bracket 420 goes straight for the lead screw 200 Even if the degree is coincident, and then, even if one coupling portion 423 is first coupled with the upper rail 300 through the coupling bolt, the alignment emboss 425 on the other side is in a state that is inserted into the receiving groove 300a, so that the coupling bolt is fastened. The deviation of the straightness of the middle bracket 420 along the direction is fundamentally blocked.

Therefore, as the straightness of the middle bracket 420 is maintained, the straightness of the gearbox housing 410 due to phosphorus is also maintained. There is no distortion, so vibration and noise do not occur.

The guide bush 430 is interposed between both sides of the gearbox housing 410 and the middle bracket 420, as shown in FIGS. 5 to 7, so that the gearbox housing 410 rides the leadscrew 200 in the front and rear directions. When moving, it blocks the flow when moving.

That is, the guide bush 430 is interposed between the gearbox housing 410 and the middle bracket 420 to maintain a close contact state between the gearbox housing 410 and the middle bracket 420. This is to prevent flow in the direction of the arrow, that is, in all directions.

The guide bush 430 for this includes a pair of partition walls 431 and a pair of support pieces 433 and a connecting piece 435.

The partition wall 431 has a plate shape, and is interposed between both sides of the gearbox housing 410 seated on the seating portion 421 of the middle bracket 420 as shown in FIG. 6 to seat the gearbox housing 410 The parts 421 are in close contact with each other.

In this case, a through hole 431a through which the leadscrew 200 passes is formed in the partition wall 431.

The support piece 433 is formed extending in a direction orthogonal to the partition wall 431 at both ends of the partition wall 431, and simultaneously supports both outer surfaces of the gearbox housing 410 and the middle bracket 420 as shown in FIG. In a state, a portion of the seating portion 421 of the gearbox housing 410 and the middle bracket 420 is accommodated to one side and the other side of the partition wall 431, that is, to the left and right in the drawing.

That is, by forming the support piece 433 on the partition wall 431, the cross-sectional shape of the partition wall 431 and the support piece 433 forms an approximate'I' shape as shown in FIG. 7, so that the support piece 433 Through this, a receiving space is formed in which a part of the seating portion 421 of the gearbox housing 410 and the middle bracket 420 is accommodated.

In this case, since a part of the gearbox housing 410 and the middle bracket 420 is accommodated between the support piece 433 of the partition wall 431, if the gearbox housing 410 is Even if the distortion in one direction occurs, the support piece 433 in the other direction supports the other outer surfaces of the gearbox housing 410 and the middle bracket 420 to block the distortion of the gearbox housing 410.

The connecting piece 435 is in the form of a plate having a predetermined width, and both ends are connected to the partition wall 431 and the support piece 433, respectively, so that the partition wall 431, the support piece 433 and the connecting piece 435 are single To be formed.

At this time, the connecting piece 435 forms a plate-like shape, so that when the coupling portion 423 of the middle bracket 420 is coupled to the upper rail 300, surface contact with the upper rail 300 is made, so that the partition wall ( 431) and the support piece 433 are inserted between the gearbox housing 410 and the middle bracket 420 in a stable state.

In addition, the guide bush 430 is preferably selected from any one of ABS, FRP, or engineer plastics having high mechanical strength without causing deformation of physical properties for the distortion of the gearbox housing 410.

Meanwhile, as shown in FIG. 2, shafts 150 are connected to both sides of the driving motor M, and each shaft 150 is connected to the gearbox housing 410 of the seat track 500 and the gearbox 400 disposed on both sides. It is inserted to provide a rotational force to the gearbox housing 410.

At this time, each shaft 150 has a different length as shown in Fig. 2 according to the setting position of the driving motor M according to the arrangement of the seat electronic components, of which the shaft 150 has a long length as shown on the left side in the drawing. ) Has a variable length structure.

The shaft 150 for this purpose has an outshaft 151 having a predetermined length in a circular rod shape and a specified shape inserted into the gearbox housing 410 at the front end, as shown in FIGS. 2 and 9. (151) It is composed of a circular inner shaft 153 having a predetermined length that is changed in length by being inserted into the inside.

That is, by allowing the inner shaft 153 to be inserted while being disposed inside the outer shaft 151 so that the total length of the shaft 150 due to the inner shaft 153 can be varied, the gearbox 400 And the assembling of the drive motor (M) can be easily achieved through the variable.

On the other hand, it is preferable that the outer shaft 151 and the inner shaft 153 are made of SUS material, because SUS has excellent corrosion resistance and high mechanical properties and heat resistance and chemical resistance, so it is most ideal to be applied as the shaft 150. to be.

When the shaft 150 is formed of SUS material, even if the shaft 150 has a predetermined length, since warping does not occur in transmitting the rotational force, vibration and shaking when the shaft 150 rotates are prevented.

In addition, the outer circumferential surfaces of the outer shaft 151 and the inner shaft 153 are formed with a plurality of fastening holes H vertically penetrating each other while maintaining corresponding positions as shown in FIG. 9.

At this time, it is preferable that at least one of the fastening holes H is formed in the outer shaft 151 and the inner shaft 153, and the number of the fastening holes H is not limited.

And, in the fastening hole (H), as shown in the figure, the outer circumferential surface of the out shaft 151 is wrapped and inserted into at least one fastening hole (H) so as to fix the retracted state of the inner shaft 153 as shown in the figure. The stopper 155 is fastened.

In this embodiment, the stopper 155 is shown to have a spring shape, but the shape is not limited because it can be fastened by pins of various shapes.

In addition, in the present embodiment, the outer shaft 151 and the inner shaft 153 are illustrated as having a circular rod shape, but since they may be formed in a polygonal or elliptical shape, the shape is not limited.

Therefore, as the shaft 150 of the present invention is made of SUS material that does not cause bending, the wear and damage of parts due to the bending of the conventional flexible shaft or the twist and amount of the gear according to the time difference due to the difference in length of the flexible shaft It solves the problem that the rotational force is transmitted differently to the seat track and has a structure in which the length is variable, so it is easy to assemble.

Hereinafter, a process of fastening the shaft 150 and the gearbox 400 will be described with reference to FIG. 9.

First, as shown in (a) of FIG. 9, the inner shaft 153 is pushed in the right direction on the drawing in the direction of the arrow, and is brought into the inner shaft 151.

It is preferable that the degree of insertion of the inner shaft 153 is sufficiently made so that there is no interference with the gearbox 400 on the left.

Thereafter, the inner shaft 153 is inserted into the gearbox 400 while moving the inner shaft 153 to the left in the drawing in the direction of the arrow as shown in FIG. 9B.

At this time, the positions of the fastening holes H of the inner shaft 153 and the outer shaft 151 are in a state of being coincident with each other as shown in the enlarged view of FIG. 9B.

When the insertion of the inner shaft 153 is completed, a plurality of matching fastening holes H of the inner shaft 153 and the out shaft 151 surround the outer circumferential surface of the out shaft 151 as shown in Fig. 9(c). Both ends of the spring-type stopper 155 are respectively penetrated to fix the variable state of the inner shaft 153 to complete the fastening of the shaft 150 and the gearbox 400.

As described so far, the automobile seat track structure of the present invention fixes both sides of the mid bracket when the gearbox is coupled to the upper rail, so that when the mid bracket is fastened through the coupling bolt, it is not rotated in the tightening rotation direction of the coupling bolt. It has an excellent effect of preventing vibration and noise from being generated by fundamentally blocking the distortion of the gearbox due to this.

In addition, the anti-torsion member is interposed between the mid bracket and the gearbox housing to support the outer surfaces of both sides of the midbracket gearbox housing, thereby blocking distortion of the gearbox housing when moving the gearbox, thereby preventing vibration and noise from occurring. Do.

In addition, since distortion of the gearbox is prevented, unnecessary contact between the upper rail and the lower rail is not made, so that vibration and noise are not generated.

In addition, a single space damper is fixed to the front bracket and the rear bracket, so that the shock absorption of the gearbox reaching the max movement point is completely achieved, so that vibration and noise due to the rubber bushing are not generated as in the prior art. There is this.

In addition, there is an effect of ensuring the safety of the occupant as the separation of the lead screw and the rear bracket is prevented in the event of a front collision of the vehicle.

In addition, by forming the shaft made of SUS material, even if the shaft has a predetermined length, it is characterized in that warpage does not occur, and the length is variable so as to have ease of assembly.

In the above, the vehicle seat track structure of the present invention has been described with reference to a preferred embodiment and the accompanying drawings, but this is not intended to limit the technical scope of the present invention only to help understanding the invention.

That is, without departing from the technical gist of the present invention, a person having ordinary knowledge in the technical field to which the present invention pertains can, of course, make various modifications or modifications, and such changes or modifications are the technical scope of the present invention for interpretation of the claims. It goes without saying that it is within.

100: lower rail 150: shaft
151: out shaft 153: inner shaft
155: stopper 200: lead screw
210: front bracket 211: front fastening piece
220: rear bracket 221: rear fastening piece
230: space damper 231: slot
240: anti-loosening nut 300: upper rail
300a: receiving groove 400: gearbox
410: gearbox housing 420: middle bracket
421: seating portion 423: coupling portion
425: alignment emboss 427: joint hole
430: guide bush 431: bulkhead
431a: through hole 433: support piece
435: connecting piece 500: seat track
600: automobile seat track H: fastening hole

Claims (10)

In the seat track structure for a vehicle in which the seat is moved by the rotational force of the shaft 150 connected to the driving motor M in a state in which two seat tracks 500 are formed in a pair,
The seat track 500,
Lower rail 100;
A lead screw 200 installed in the longitudinal direction of the lower rail 100 by being coupled to the front bracket 210 and the rear bracket 220 installed on the lower rail 100;
An upper rail 300 slidably installed on the lower rail 100; And
A gearbox housing 410 in which a worm shaft and a worm wheel nut are installed orthogonally to each other by moving in the front and rear directions by riding the leadscrew 200, and the upper rail 300 support the gearbox housing 410. ) Coupled to the middle bracket 420, and a guide bush 430 interposed between the gearbox housing 410 and the middle bracket 420 to block the flow of the gearbox housing 410, and a gearbox 400 consisting of ); includes,
The guide bush 430 has a through hole 431a through which the lead screw 200 passes, and a pair of partition walls 431 interposed between the gearbox housing 410 and the middle bracket 420, respectively. ; It is formed extending perpendicularly to the partition wall 431 at both ends of the partition wall 431, and supports one side of the partition wall 431 while simultaneously supporting both outer surfaces of the gearbox housing 410 and the middle bracket 420 A pair of support pieces 433 for accommodating a portion of the gearbox housing 410 and the middle bracket 420 to the other side; And a connecting piece (435) connecting the partition wall (431) and the support piece (433).
The method of claim 1,
The middle bracket 420 has a seating portion 421 in which the gearbox housing 410 is seated in a state in which the leadscrew 200 passes, and the upper rail ( 300) and a pair of coupling portions 423 coupled through a coupling bolt,
An alignment emboss 425 is formed to protrude on the upper surface of each of the coupling portions 423 so as to ensure the straightness of the middle bracket 420 when coupled to the upper rail 300, and the upper rail 300 A receiving groove 300a in which the alignment emboss 425 is accommodated is formed, and when the middle bracket 420 is coupled to the upper rail 300, the straightness of the gearbox 400 is the lead screw 200 Seat track structure for a vehicle, characterized in that to match the direction.
delete The method of claim 1,
The guide bush 430 is a seat track structure for a vehicle, characterized in that made of any one of ABS, FRP or engineer plastic.
The method of claim 1,
At both ends of the leadscrew 200 coupled to the front bracket 210 and the rear bracket 220, when the gearbox 400 moves on the leadscrew 200, a set movement in the front and rear directions is made. And a space damper 230 for absorbing impact when a collision occurs according to the reaching of the set point of the gearbox 400. A seat track structure for a vehicle, characterized in that.
The method of claim 5,
The space damper 230,
It is composed of a body 231 having a predetermined length and a plurality of slots 232 formed to be spaced apart along the longitudinal direction of the body 231 and having a predetermined space for absorbing an impact when the gearbox 400 collides. Seat track structure for automobiles characterized by.
The method of claim 5,
The space damper 230 is a seat track structure for a vehicle, characterized in that the Teflon has a predetermined elasticity and does not change physical properties against repeated impacts.
The method of claim 1,
The front bracket 210 and the rear bracket 220 are formed with a bent front fastening piece 211 and a rear fastening piece 221 through which the leadscrew 200 passes, and a lead screw passing through the fastening piece ( 200) is a seat track structure for automobiles, characterized in that the loosening prevention nut is fastened.
The method of claim 1
The shaft 150 connected to the drive motor M is inserted into the gearbox housing 410 of the gearbox 400,
The shaft 150 is composed of an out shaft 151 having a predetermined length and an inner shaft 153 whose length is variable by being inserted into the out shaft 151,
The outer circumferential surfaces of the outer shaft 151 and the inner shaft 153 are formed to each pass through a plurality of fastening holes H at positions corresponding to each other,
A spring-shaped stopper 155 inserted into at least one fastening hole H is fastened to the fastening hole H while surrounding the outer circumferential surface of the out shaft 151 to fix the retracted state of the inner shaft 153. Seat track structure for a vehicle, characterized in that.
The method of claim 9
The outer shaft (151) and the inner shaft (153) is a seat track structure for a vehicle, characterized in that the SUS material.

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