JPH0966761A - Gearbox mounting structure of power seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a stable holding with no deflection achievable without entailing any structural complication. SOLUTION: A gearbox 12 is assembled under the connection of a right half part 12R and a left half part 12L by two connecting members 22 (22-1 and 22-2). In addition, after insertion and interposition into space between a pair of vertical walls 32b and 32b of an upper rail 32, the gearbox 12 is made lockable to this upper rail by engagedness in a spring pin 48 at one spot, and besides, the engagement of stepped part 40 to the terminal of a horizontal wall 32a of the upper rail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power seat gearbox mounting structure for mounting a gearbox for transmitting a drive of a motor to a lead screw of a drive mechanism to a rail body of a power slide.

[0002]

2. Description of the Related Art For example, a so-called power seat capable of appropriately adjusting a seat position, a seating posture and the like under the drive of a motor is widely provided as a front seat of a passenger car.

The power seat is formed, for example, with a seating posture control device such as a seat slide device and a reclining device, and the front and rear positions of the seat and the inclination of the seat back are actuated under the operation of each device accompanying the driving of the motor. The angle (reclining angle) and the like are individually adjustable.

Here, the seating posture control device is, for example,
It is equipped with a drive mechanism that can be linked to the motor. The drive mechanism is formed by having a combination of a lead screw linked to a motor via a gear box and a receiving member into which the lead screw is screwed. By the movement of the lead screw with respect to the receiving member or the movement of the receiving member with respect to the lead screw, the target seating posture control device can be operated.

[0005]

As a seat slide device mounted on a power seat, a so-called power slide, there is known a structure in which a drive mechanism is built in a rail body composed of, for example, an upper rail and a lower rail.

[0006] In such a structure, usually, the gearbox from which the lead screw is extended is fixed to the upper rail, and the receiving member formed as a nut block into which the lead screw can be screwed is fixed to the lower rail. Has been done. Then, the upper rail is slid with respect to the lower rail under the movement of the lead screw in the axial direction with respect to the nut block (receiving member).

[0007] In this type of power slide, a gear box is usually attached to a front projecting position of the upper rail via a bracket or the like. However, in mounting such a gear box, since the bracket and the like must be extended in front of the upper rail in a cantilever manner, the bracket and the like tend to be large.

Further, the fixing of the bracket or the like to the upper rail and the fixing of the gear box to the bracket or the like are usually performed by a plurality of mounting screws or the like.

That is, in the known structure, the number of parts is large and the structure is complicated, so that the workability is apt to be lowered and the cost is apt to be increased.

Further, in the known structure, since the gearbox is supported by a so-called cantilever bracket or the like, if an excessive load acts on the gearbox, the gearbox will act on the nut block under the load. On the other hand, it is possible that there is a possibility of blurring in the vertical direction. Such a shake of the gear box causes an inclination of the lead screw with respect to the nut block, which may hinder the smooth rotation of the lead screw with respect to the nut block.

Since the load acting on the lead screw is directly transmitted to the gearbox, the gearbox itself is required to have high rigidity. Therefore, the shape of the gear box is likely to be complicated, and from this point as well, workability is likely to decrease and cost is likely to increase.

Further, in the power seat, not only the drive mechanism of the power slide but also the drive mechanism of the reclining device is mounted on the rail body of the power slide. However, in the known configuration, since the drive mechanism of the reclining device is mounted on the side of the rail body or the like via the bracket or the like, the number of components is increased, the configuration is complicated, and the gear is similar to the above. It is unavoidable that excessive load is concentrated on the box.

In the known construction, the drive mechanism is provided so as to project laterally from the rail body, so that the overall arrangement of the power seat tends to be complicated.

It is an object of the present invention to provide a gearbox mounting structure for a power seat, which enables stable holding without blurring without complicating the structure.

[0015]

In order to achieve this object, according to the present invention, the gearbox is formed by a vertical split along the axis of a lead screw extending from the gearbox. It is divided into two parts, and is assembled under the connection of the right half part and the left half part by the connecting members at at least two positions separated from each other in the axial direction of the lead screw.

According to the embodiment of the present invention,
The gear box is formed to have a lateral width that can be inserted and interposed between a pair of vertical walls of the substantially H-shaped upper rail, and a step portion that can be engaged with the end of the horizontal wall of the upper rail has an upper surface of the gear box. It is provided on at least one of the lower surfaces. Then, by inserting the upper rail between the pair of vertical walls, locking it with one locking member after the interposition, and engaging the step portion with the end of the horizontal wall of the upper rail, the gear box is locked. It is fixed to the rail.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in a gearbox mounting structure 10 for a power seat according to the present invention,
The gear box 12 is configured to be capable of converting drive of a motor (not shown) into rotation of the lead screw 14 and transmitting the rotation.
It is attached and fixed to a rail body 16 of a power slide which is one of seating posture control devices for a power seat.

As can be seen in FIG. 3, the gearbox
For example, 12 is a combination of a worm 18 to which an output shaft (not shown) of the motor is connected and a worm wheel 20 provided integrally with the lead screw 14 so that the lead screw can be rotated under the drive of the motor. Is formed in. As shown in FIGS. 1 to 3, the lead screw 14 is provided so as to extend from the gear box 12 in one direction, for example, a direction corresponding to the rear of the power seat (right side in the drawings).

Here, as shown in FIG. 1 and FIG. 3, in the present invention, the gear box 12 has the lead screw 14
Right half 12R, left half 12L by vertical division along the axis of
It is divided into two. Then, after the worm 18 and the lead screw 14 are arranged and housed, the connecting members 22 (22-1, 22-1, at the two positions separated from each other in the axial direction of the lead screw).
The gearbox 12 is assembled by connecting the right half 12R and the left half 12L to each other by 22-2).

A spring pin, for example, can be used as the rear connecting member 22-1, which is the extended side of the lead screw 14, and the right half portion of the gear box can be formed by the continuous insertion of the spring pin into the corresponding insertion hole 24. 12R, left half 12
The rear parts of L are interconnected.

On the other hand, that is, the front connecting member 22-2.
For example, a so-called pipe-shaped connecting member formed in a pipe shape can be used. As can be seen from FIG. 4 in addition to FIG. 3, the pipe-shaped connecting member 22-2 is continuously pierced through the corresponding insertion holes 26 of the right half 12R and the left half 12L of the gear box, so that each terminal is connected. By the caulking, the front parts of the right half part and the left half part are permanently connected to each other.

In this case, the right half 12 of the gear box
R, a pipe-shaped connecting member 22 continuous to the outer surface of the left half 12L
It is preferable to provide a storage portion 26a capable of storing the crimped portion of the -2 terminal.

As can be seen from FIG. 2, the lead screw 14 extended from such a gear box 12 is linked to the drive of the motor in combination with the receiving member 28 with which the lead screw is screwed. Drive mechanism 30
Such a drive mechanism is built in the rail body 16 of the power slide mounted on the power seat as one of the seating posture control devices, for example.

As can be seen by looking at FIG. 5 in addition to FIG.
The rail body 16 of the power slide is, for example, a substantially H-shaped upper rail having a protruding piece 31 protruding outward at the lower end.
The upper rail is slidably incorporated into the lower rail by including a combination of the lower rail and a lower rail having a guide groove 35 that slidably holds the protruding piece. Then, as shown in FIG. 2, the lead screw 1
4. The drive mechanism 30 including the receiving member 28 is built in the rail body 16 by being arranged between the horizontal wall 32a of the upper rail and the bottom wall 36a of the lower rail.

In the embodiment of the present invention,
The drive mechanism 30 is formed for the operation of the power slide. As shown in FIG. 2, in this type of drive mechanism 30, the receiving member 28 is formed as a nut block into which the lead screw 14 can be screwed, and this nut block is attached to the bottom wall 36a of the lower rail, for example, the bolt 38. Is fixed by.

In such a configuration, the nut block (receiving member) 28 fixed to the lower rail 36 serves as a fixing member for the movable upper rail 32, so that the lead screw 14 rotates under the rotation of the motor. The lead screw is screwed in and out of the nut block in the axial direction. Therefore, the rotation of the lead screw 14 under the drive of the motor causes the upper rail 32 to slide in the corresponding direction with respect to the lower rail 36.

Here, in the present invention, the gear box 12 is inserted between the pair of vertical walls 32b of the upper rail 32,
It is formed so that it can be interposed. That is, as shown in FIG. 5, the lateral width L1 of the gear box 12 is formed narrower than the inner width L2 between the pair of vertical walls 32b of the upper rail.

As shown in FIGS. 1 and 2, according to the present invention, the step portion 40 engageable with the end of the horizontal wall 32a of the upper rail is provided on the upper surface of the gear box 12, for example. There is. In this embodiment, the height of the rear portion of the gear box 12 that is the extension side of the lead screw 14 is lowered by a corresponding amount within an appropriate range L3, so that the step portion 40 is provided on the upper surface of the gear box. Has been formed.

Also, for example, the right half 12 of the gear box
The projection 42, which is combined in a substantially cylindrical shape by the connection of R and the left half 12L, is located in the range L3 behind the step 40 of the gear box 12.
And, it is provided on the same surface as the step portion, that is, on the upper surface of the gear box 12. A fitting hole 44 into which the protrusion 42 of the gear box can be fitted is formed at a corresponding position on the horizontal wall 32a of the upper rail.

The gear box 12 as described above is attached to the upper rail 32 of the power slide as follows.

As shown in FIGS. 1 and 2, the gear box 12
Is first inserted between the pair of vertical walls 32b of the upper rail from the extension side of the lead screw 14 to the position where the step portion 40 engages with the end of the horizontal wall 32a. At this time, the protrusion 42 of the gear box is fitted into the fitting hole 44 of the horizontal wall as the step portion 40 is engaged with the end of the horizontal wall 32a.

As can be seen from FIG. 4 in addition to FIGS. 1 and 2, in the present invention, the pipe of the gear box is engaged at the position where the step portion 40 is engaged with the end of the horizontal wall 32a of the upper rail. Insertion holes 46 that can be aligned with the hollow portion 22-2a of the linear connection member 22-2 are formed in the pair of vertical walls 32b of the upper rail, respectively. The gear box 12 is fixed to the upper rail 32 by the continuous penetration of the locking member 48 into the insertion hole 46 and the hollow portion 22-2a of the pipe-shaped connecting member.

As the locking member 48, for example, the insertion hole 46 of the upper rail and the hollow portion 22-2 of the pipe-shaped connecting member are used.
A spring pin that can be continuously fitted to a is available.

Here, in the present invention, the rear portion of the gear box 12 has the upper rail under the engagement of the step portion 40 with the end of the horizontal wall 32b and the fitting of the protrusion 42 into the fitting hole 44. It is only connected to 32. However, since the front portion of the gear box 12 is fixed by the locking pin (locking member) 48 to the vertical wall 32b of the upper rail, the gear box 12 with respect to the upper rail 32 is supported by so-called two-point support. The movement of is surely sealed.

Further, since the gear box 12 is sandwiched from the side by the pair of vertical walls due to the insertion and interposition of the upper rail between the pair of vertical walls 32b, the lateral movement of the gear box 12 also causes the vertical movement of the upper rail. Securely sealed by the wall.

As described above, in the power seat gearbox mounting structure 10 of the present invention, the stepped portion 40 is engaged with the end of the horizontal wall 32a, and the locking pin (locking member).
By locking the front portion at 48, the gear box 12 is directly attached to the upper rail 32 of the power slide, so that a cantilever bracket extending forward, which is well known, is not necessary. Further, since the separate member used when mounting the gear box 12 to the upper rail 32 is only the spring pin (locking member) 48 for locking the front portion, the number of parts can be surely reduced. .

That is, according to the present invention, it is sufficient that the step portion 40 is engaged with the end of the horizontal wall 32a and that one portion of the front portion is locked by the locking pin 48, so that the number of parts is reduced. The simplification of the configuration can be easily obtained.

Then, the gear box 12 is attached to the upper rail.
Because it is attached directly to the 32, despite the simple configuration,
It is possible to easily secure stable holding of the gear box against the upper rail without shaking. Therefore, the gearbox 12
Does not shake with respect to the axis of the nut block 28,
Sufficient smooth rotation of the lead screw with respect to the nut block can be ensured.

Further, in this configuration, the lead screw 14
Since the load acting on the gear box 12 from the above is released to the upper rail from the two locking portions with respect to the upper rail 32, the load is not concentrated on one place. Therefore, firm locking and holding of the gear box 12 with respect to the upper rail 32 can be easily ensured, and reliability of holding the gear box is improved.

Further, in the present invention, the gear box
12 is a right half portion 12R and a left half portion 12 by two connecting members 22 (22-1, 22-2) separated from each other in the axial direction of the lead screw 14.
Assembled by connecting L. Therefore, the gear box 12 can be easily and easily assembled.

After the assembly, the gear box 12 is inserted and interposed between the pair of vertical walls 32b of the upper rail. In other words, the vertical wall 32b of the upper rail functions as a reinforcement for the gear box 12, so the right half 12R and the left half
12L disassembly is reliably prevented. Therefore, according to the present invention, high rigidity can be sufficiently maintained in the gear box 12 in spite of the simple structure and connection, and from this point also, the certainty of holding the gear box is improved.

Here, in the above-described embodiment of the present invention, the projection 42 is provided on the rear portion of the gear box 12 and is fitted into the corresponding fitting hole 44 of the horizontal wall 32a of the upper rail. However, it is sufficient if the rear portion of the gear box 12 is locked to the upper rail 32 under the engagement of the step portion 40 with the end of the horizontal wall 32a. May be omitted.

However, if the protrusion 42 and the engaging hole 44 are provided, the upper rail 32 is fitted into the engaging hole while the protrusion is fitted into the upper rail 32.
Since the forward movement of the gearbox 12 with respect to the gearbox is reliably sealed, the holding of the gearbox is further stabilized without complicating the configuration.

Further, in this embodiment, the stepped portion 40 is formed on the upper surface of the gear box by lowering the height of the rear portion of the gear box 12 in the range L3. However, since it is sufficient to provide the step portion 40 that can be engaged with the end of the horizontal wall 32a of the upper rail on the upper surface of the gear box 12, the invention is not limited to this, and without lowering the height of the range L3, for example,
A protrusion that can be engaged with the end of the horizontal wall may be provided on the upper surface of the gear box.

Since the gearbox mounting structure 10 is illustrated here as a structure in which the drive mechanism 30 is arranged between the horizontal wall 32a of the upper rail and the bottom wall 36a of the lower rail, the horizontal wall of the upper rail is illustrated. Although the step portion 40 that can be engaged with the end of the gear 32a is provided on the upper surface of the gear box 12, the present invention is not limited to this. Needless to say, the same effect as described above can be ensured by providing it on the lower surface of the.

Further, in this embodiment, the right half portion 112R and the left half portion 112L of the gear box are connected by the connecting members 22 (22-1, 22-2) at two places. The number of locations is not limited to two, as multiple locations are sufficient.
There may be more than one place. However, in this invention,
Since the gear box 12 is interposed between the pair of vertical walls 32b of the upper rail, if there are two locations separated from each other in the axial direction of the lead screw 14, a sufficient connecting force is exerted between the right half 12R and the left half 12L. can get. Therefore, by connecting at two places, the number of parts can be reduced also from this point.

In the embodiment of the present invention described above, the stepped portion 40 on the upper surface of the gear box 12 is engaged with the end of the horizontal wall 32a of the upper rail, but the present invention is not limited to this. , For example, as shown in FIGS.
Like a gearbox mounting structure 110 for a power seat according to another embodiment of the present invention, step portions 140 are provided on the left and right side surfaces of the gearbox 112, and ends of a pair of vertical walls 132b of a substantially H-shaped upper rail 132. Alternatively, the stepped portion may be engaged.

As can be seen from FIG. 8 in addition to FIG. 6,
Also in this gear box mounting structure 110, the gear box 112 is divided into two parts, a right half part 112R and a left half part 112L, by vertical division along the axis of the lead screw 14. And the worm 18 and the worm wheel 20
The right half 112R and the left half by the connecting members 52 (52-1, 52-2) at the two positions separated from each other in the axial direction of the lead screw after the lead screw 14 having the integrated
The gearbox 112 is assembled by connecting the 112Ls to each other.

As can be seen from FIG. 9 in addition to FIG. 8, the rear connecting member 52-1 which is the extension side of the lead screw 14 is, for example, the same as in the above-described embodiment. Right half 112R, left half 112L insertion hole 54
A spring pin that can be continuously fitted to is available. As can be seen from FIG. 10 in addition to FIG. 8,
In this embodiment, as the front connecting member 52-2, for example, a screw that can be screwed into the screw hole 58 of the left half 112L via the insertion hole 56 of the right half 112R of the gear box is used. ing.

As shown in FIGS. 6 and 9, the rail body 116 of the power slide has a protruding piece similar to the above-described embodiment.
An approximately H-shaped upper rail 132 having 131 at the lower end,
It is formed in combination with a lower rail 136 having a corresponding shape having a guide groove 135 slidably holding the protruding piece. Then, as shown in FIG. 11, also in this embodiment, the drive mechanism 30 including the combination of the lead screw 14 and the receiving member 28 has the same purpose as that of the above-described embodiment for the purpose of operating the power slide. It is arranged between the horizontal wall 132a of the upper rail and the bottom wall 136a of the lower rail.

The receiving member 28 is formed as a nut block and is fixed to the bottom wall 136a of the lower rail by a bolt 38 or the like.

As shown in FIG. 7, in the gearbox mounting structure 110, at least the extension side of the lead screw 14 of the gearbox 112 is the upper rail.
Stepped portions 140 that are formed so as to be partially inserted and interposed between a pair of vertical walls 132b of 132 and that can be engaged with the ends of the vertical walls are provided on the left and right side surfaces of the gear box, respectively.

As shown in FIGS. 7 and 10, in this embodiment, the lateral width L4 of the gear box 112 is formed wider than the inner width L2 of the pair of vertical walls 132b of the upper rail. Then, as shown in FIGS. 7 and 9, the gear box 11
The lateral width L6 of the predetermined range L5 at the rear part of the second portion 2 is formed to be narrower than the inner width L2 between the pair of vertical walls 132b of the upper rail.

That is, in this embodiment, the inner width L2 between the pair of vertical walls 132b of the upper rail, the gear box
The width L4 of 112 and the width L6 of the rear part of the gear box are formed so that L4>L2> L6, and the width L4 and width L6 are defined by the step 140 on the side of the gear box. There is.

In this case, the difference between the overall lateral width L4 of the gear box 112 and the partial lateral width L6 of the rear portion is used to form the step portions 140 on the left and right side surfaces of the gear box.
Without being limited to this, for example, the overall lateral width of the gear box is a lateral width L6 of the rear portion narrower than the inner width L2 between the vertical walls 132b of the upper rail, and it is engageable with the ends of the pair of vertical walls 132b of the upper rail. A protrusion having a width L4 may be provided on each of the right half 112R and the left half 112L of the gear box.

In this gearbox mounting structure 110, the gearbox 112 is mounted on the upper rail 132 of the power slide as follows.

As shown in FIGS. 6 and 11, the gear box
112, first, between the pair of vertical walls 132b of the upper rail,
From the extension side of the lead screw 14, that is, from the rear,
The step portion 140 is inserted into the end of the vertical wall up to the engaging position. As seen from FIG. 9 in addition to FIG. 6, there are a pair of insertion holes 62 aligned with the insertion hole 60 at the rear of the gear box at the engagement position of the step 140 with the end of the vertical wall 132b of the upper rail. The gearbox 112 is fixed to the upper rail 132 by the continuous penetration of the locking member 64 into each insertion hole.

As the locking member 64, for example, a locking pin which can be continuously fitted in the insertion holes 60 and 62 of the gear box and the upper rail can be used.

In such a structure, the gear box 112 is locked by the locking pin (locking member) 64 and so-called two-point support by the engagement between the ends of the pair of vertical walls 132b and the step portion 140. Is attached to the upper rail 132, so that the movement of the gear box with respect to the upper rail is reliably sealed, as in the above-described embodiment.

Further, by partially inserting and interposing the rear portion between the pair of vertical walls 132b of the upper rail, the gear box 11
Since 2 is sandwiched by a pair of vertical walls from the side, the lateral movement is surely sealed by the vertical wall of the upper rail.

As described above, also in the gearbox mounting structure 110 of this power seat, the step portion 140 is engaged with the ends of the pair of vertical walls 132b, and the locking pin 64 secures one portion of the rear portion of the gearbox 112. Upper rail 13
Since it suffices to engage with 2, it is possible to easily obtain the simplification of the configuration due to the reduction in the number of parts, as in the above-described embodiment.

Also in the gear box mounting structure 110, since the gear box 112 is directly mounted on the upper rail 132, it is easy to stably hold the gear box on the upper rail without shaking, despite the simple structure. Can be secured. Therefore, the gearbox 112
Does not shake with respect to the axis of the nut block 28,
Sufficient smooth rotation of the lead screw 14 with respect to the nut block can be ensured.

Also in this embodiment, the gear box 112 has the right half portion 112R formed by the two connecting members 52 (52-1, 52-2) separated from each other in the axial direction of the lead screw 14,
Since it is assembled by connecting the left half 112L, the gear box can be assembled easily and easily. Then, attach the rear part of the gear box 112 to the pair of vertical walls 132b of the upper rail.
Since the gearbox is inserted and intervened between the gearboxes, high rigidity can be sufficiently maintained in the gearbox, and from this point also, the certainty of holding the gearbox is improved.

Here, in the gear box mounting structure 110 of this configuration, as shown in FIGS. 6, 7 and 10, the protruding piece 66 that can be loosely inserted in the guide groove 135 of the lower rail.
Is preferably provided on each of the left and right side surfaces. The protruding piece 66 extends, for example, along the guide groove 135 of the lower rail and is aligned with the protruding piece 131 of the upper rail.

In such a structure, the movement of the gear box 112 in the vertical direction with respect to the upper rail 132 is blocked by the engagement of the projecting piece 66 of the gear box with the guide groove 135. From this point as well, Stable holding of the gearbox against the upper rail can be ensured.

Since the gear box 112 is mounted in front of the upper rail 132, the gear box projecting piece 66 functions as an extension of the upper rail projecting piece 131. That is, even if the upper rail 132 is formed shorter by the length corresponding to the protruding piece 66 of the gear box, the stability of the upper rail with respect to the lower rail 136 is maintained unchanged. Therefore, the upper rail 132 can be made shorter than the lower rail 136 by a length corresponding to the protruding piece 66 of the gear box, and also in this respect, the cost can be reduced.

By the way, in the above-described two embodiments, the seating posture control device to be operated is embodied as a power slide, and the drive mechanism 30 can operate the power slide. The combination of the lead screw 14 and the nut block 28 is used. Are formed from. However, the present invention is not limited to this, and for example, as shown in FIG. 12, the gearbox 212 of the drive mechanism 68 for the reclining device that adjusts the inclination angle (reclining angle) of the seat back is attached to the upper rail 232 of the power slide. It may be attached.

As can be seen from FIG. 13 in addition to FIG. 12, in this gearbox mounting structure 210 as well, the gearbox 212 is vertically split along the axis of the lead screw 70 to form the right half 212R and the left half 212L. It is divided into two. Then, the connecting members 72 (72-1, 72-2, 7) at locations separated from each other in the axial direction of the lead screw 70, for example, at three locations.
The gear box 212 is assembled by connecting the right half portion 212R and the left half portion 212L to each other by 2-3).

As shown in FIG. 12, in this gear box 212, the rear portion, which is the extension side of the lead screw 70, is connected at two locations separated vertically. Further, in this embodiment, a screw is used as the upper connecting member 72-1 and a spring pin is used as the lower connecting member 72-2.

Further, as shown in FIG. 14, as the front connecting member 72-3, for example, a pipe-like connecting member can be used similarly to the gear box 12 in the above-mentioned embodiment, and it corresponds to the gear box. The right half portion 212R and the left half portion 212L of the gear box are connected by the penetration of the pipe-shaped connecting member through the insertion hole 73 and the crimping of each terminal.

As shown in FIGS. 12 and 13, the rail body 216 of the power slide has a substantially H-shaped upper rail 232 having a protruding piece 231 at the lower end, as in the above-described embodiment.
And a lower rail 236 having a corresponding shape having a guide groove 235 that slidably holds the protruding piece. In this embodiment, the drive mechanism 68 including the combination of the lead screw 70 and the receiving member 74 is provided above the horizontal wall 232a of the upper rail,
It is interposed between the pair of vertical walls 232b.

In the drive mechanism 68 for which the reclining device is operated, the receiving member 74 is formed as a cylindrical nut that is screwed into the lead screw 70, and this cylindrical nut has one end fixed to the seat back. The other end of the support arm 76 is rotatably connected by a pivot pin 78.

As can be seen from FIG. 15 in addition to FIG. 12, a pair of left and right brackets 80, 81 are fixed to a pair of vertical walls 232b of the upper rail by rivets 84 or the like, and the brackets are clamped and pivotally supported. The support plate 76 is pivotally supported by the pin 86 so as to be swingable in the front-rear direction with respect to the upper rail 232 via a bracket.

Note that, as shown in FIGS. 12 and 13, the drive mechanism 68 is normally arranged on the rail body 216 of the power slide together with the drive mechanism 30 for the power slide. The mounting of the gearbox 12 of the drive mechanism 30 can be used without changing the configuration of the gearbox mounting structure 10 described above, and therefore will not be described in detail here.

As can be seen from FIGS. 13 and 14, in the gearbox mounting structure 210, the gearbox can be inserted and interposed between the pair of vertical walls 232b of the upper rail under a predetermined inclination angle. The width L7 of the corresponding portion of 212 is formed narrower than the inner width L8 of the vertical wall. Then, the gear box 212 is interposed between the pair of vertical walls 232b above the horizontal wall 232a, and the insertion hole 88 of the vertical wall and the locking member 90 for locking the hollow portion 72-3a of the pipe-shaped connecting member 72-3. The gear box 12 is fixed to the upper rail 32 by continuous penetration.

As the locking member 90, for example, a spring pin which can be fitted into the pair of vertical wall insertion holes 88 can be used.

By the way, when the lead screw 70 rotates under the driving of the motor, and the cylindrical nut 74 is screwed and retracted along the axis of the lead screw with the rotation of the lead screw, the support arm 76 becomes It tries to rotate around the pivot pin 86 following the advance / retreat position of the cylindrical nut, but in this case, the vertical position of the pivot pin 78, which is the connection point between the support arm and the nut cylinder, fluctuates. .

Therefore, as shown in FIG. 14, in the present invention, the spring pin (locking member) 90 is loosely inserted into the pipe-shaped connecting member 72-3, so that the gear box is locked.
The 212 can be swung in the vertical direction around the spring pin with respect to the upper rail 232. With such a configuration, even if the vertical position of the pivot pin 78 changes due to the rotation of the support arm 76, the gear box 212 moves the spring pin 90.
Since it is swung around, the vertical displacement of the spring pin and the pivot pin is surely guaranteed (see FIG. 12).

Therefore, it is possible to easily ensure the smooth rotation of the support arm 76 under the operation of the drive mechanism 68, that is, the smooth swing of the seat back.

As described above, according to the gearbox mounting structure 210 of the power seat of this embodiment, since the gearbox 212 can be swung in the vertical direction, the deviation of the movement loci of the plurality of movable members is guaranteed. It is possible to sufficiently install the gear box of the drive mechanism such as the reclining device required by the above.

Since the gear box 212 is attached to the upper rail with the spring pin 90 being locked at one place, the attaching work becomes easy,
Workability is improved.

Further, since the gear box 212 assembled by connecting the right half portion 212R and the left half portion 212L is inserted and interposed between the pair of vertical walls 232b of the upper rail, the gear box is surely fixed by the vertical walls. Reinforced. Therefore, the gear box 212 having high rigidity can be easily secured, and the safety against the load from the lead screw 70 is surely improved.

According to the present invention, the drive mechanism 68 for the reclining device is provided with the power slide drive mechanism 30 and the power slide drive mechanism 30, unlike the known configuration in which the drive mechanism is arranged on the side of the rail body of the power slide. Since it is built in the slide rail body 216, it is possible to prevent the periphery of the rail body from becoming large and to simplify the configuration of the corresponding peripheral portion.

Here, as can be seen from FIG. 15, in the present invention, the upper and lower sides and the left and right sides of the cylindrical nut 74 of the drive mechanism are a pair of brackets 80, 8 which are fixing members.
Surrounded by one and the upper rail horizontal wall 232a. That is, even if the cylindrical nut 74 is forcibly moved in either the vertical direction or the horizontal direction due to an excessive load from the support arm 76 or the like, the pair of brackets 80, 8
1 and under contact with the upper rail horizontal wall 232a,
Since excessive movement of the cylindrical nut is prevented, the buckling of the lead screw 70 due to the action of the load can be prevented before it becomes too large.

Therefore, by suppressing the buckling of the lead screw 70, the seat back can be stabilized when an excessive load is applied.

In the embodiment of the present invention,
Although the combination with the gear box 12 is shown as an example, it is needless to say that the same effect as described above can be obtained in the combination with the gear box 112.

Further, in the above-described embodiments, the gearbox mounting structure is embodied as a structure in which the power slide and the gearbox of the drive mechanism for operating the reclining device are mounted on the upper rail, respectively. The present invention is not limited to this, as long as the seating posture control device capable of mounting the drive mechanism to the drive mechanism is not limited to this. For example, even when the present invention is applied when mounting the gear box of the drive mechanism for a seat lifter or the like. Good.

In the embodiment, the gearbox mounting structure for a power seat of a passenger car or the like is embodied, but the power seat is sufficient, and the invention is not limited to this. For example, a train, an airplane, a ship. The present invention may be applied to such a sheet and a sheet for bean jam, hairdressing and the like.

The above-described embodiments of the present invention are for explaining the present invention and are not intended to limit the present invention in any way, and modifications and alterations made within the technical scope of the present invention are also possible. It goes without saying that all are included in this invention.

[0091]

As described above, according to the gearbox mounting structure of the power seat according to the present invention, the gearbox is directly attached to the upper rail under the engagement at one location by the engagement means. Since it is attached, simplification of the configuration due to the reduction of the number of parts can be easily obtained.

Further, since the gear box is directly attached to the upper rail, it is possible to easily secure stable holding of the gear box with respect to the upper rail despite the simple structure. Therefore, the gear box does not shake with respect to the axis of the receiving member, and the smooth rotation of the lead screw with respect to the receiving member can be sufficiently ensured.

Further, by the locking by one locking member and the engagement of the step portion with the corresponding terminal of the upper rail,
Since the gearbox is attached to the upper rail by so-called two-point support, the load acting on the gearbox from the lead screw etc.
It is escaped to the upper rail from the locking part at several places. Therefore, the load is not concentrated at one place, and the reliable locking and holding of the gear box with respect to the upper rail secures the holding reliability of the gear box.

Further, in the present invention, the gear box is divided into two parts by longitudinal division along the axis of the lead screw.
It is divided and assembled by connecting the right half part and the left half part by two connecting members separated in the axial direction of the lead screw. Therefore, the gear box can be easily and easily assembled.

After the assembly, the gear box is inserted and interposed between the pair of vertical walls of the upper rail,
Since this vertical wall functions as a reinforcement for the gear box,
Disassembly of the right and left halves is reliably prevented. Therefore, according to the present invention, high rigidity can be sufficiently maintained in the gear box despite the simple structure and connection, and from this point also, the certainty of holding the gear box is improved.

Further, in the structure in which the step portion is provided on either the upper or lower surface of the gear box, the projection is provided on the same surface as the step portion, and the fitting hole into which the projection can be inserted is formed in the horizontal wall of the upper rail. If it is installed, the forward movement of the gearbox with respect to the upper rail will move together with the engagement by the engagement member and the engagement between the stepped portion and the terminal under the fitting of the protrusion into the engagement hole. Securely sealed. Therefore, the holding of the gear box can be further stabilized without inviting a complicated structure.

Further, if one of the two connecting members of the gear box is a pipe-like connecting member,
Since the hollow portion of the pipe-shaped connecting member can be used as the insertion hole of the locking member when locking the upper rail, it is not necessary to provide a separate insertion hole in the gear box.
Therefore, the space for forming the insertion hole can be omitted, and the downsizing of the gear box and the simplification of the configuration can be easily achieved.

Further, in the configuration in which the step portions are provided on the left and right side surfaces of the gear box, if the protruding pieces slidable in the guide grooves of the lower rail are provided on the left and right side surfaces of the gear box, respectively, the gear box with respect to the guide grooves Since the movement of the gear box with respect to the upper rail in the vertical direction is blocked by the engagement of the projecting piece, stable holding of the gear box with respect to the upper rail can be ensured also from this point.

Since the protruding piece of the gear box functions as an extension of the protruding piece of the upper rail, the stability of the upper rail with respect to the lower rail is maintained unchanged. Therefore, the upper rail can be made shorter than the lower rail by a length corresponding to the protruding piece of the gear box, and also in this respect, cost reduction can be achieved.

Further, if the gear box is swingably supported with respect to the upper rail, a shift of the movement locus occurs between the receiving member for the lead screw of the drive mechanism and the movable member connected to the receiving member. Also, since the shift of the movement locus can be guaranteed under the swing of the gear box, it can be particularly effectively used in the configuration in which the receiving member is connected to the movable member.

In the structure in which the receiving member is a cylindrical nut, and at least the upper and lower sides and the right and left sides of the cylindrical nut are surrounded by the upper rail and the fixing member for the upper rail, the cylindrical nut is contacted with the corresponding member. Since excessive movement of the nut is prevented, buckling of the lead screw can be sufficiently suppressed. Therefore, by suppressing the buckling of the lead screw, the seat back can be stabilized when an excessive load is applied.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view between a gearbox and a rail body in a gearbox mounting structure for a power seat according to an embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view taken along the axis of the lead screw in the gearbox mounting structure for the power seat shown in FIG.

FIG. 3 is a schematic exploded perspective view of the gear box shown in FIG.

4 is an end view of the gearbox mounting structure taken along line AA of FIG.

5 is a schematic front view of the gearbox mounting structure of the power seat shown in FIG. 1. FIG.

FIG. 6 is a gearbox of a power seat gearbox mounting structure according to another embodiment of the present invention;
It is a schematic exploded perspective view between rail bodies.

7 is a schematic plan view of a gearbox mounting structure of the power seat shown in FIG.

8 is a schematic exploded perspective view of the gear box shown in FIG.

9 is an end view of the gearbox mounting structure taken along line BB of FIG. 11. FIG.

10 is a cross-sectional view of the gearbox mounting structure taken along the line CC of FIG.

11 is a schematic vertical sectional view taken along the axis of the lead screw in the gearbox mounting structure for the power seat shown in FIG.

FIG. 12 is a schematic vertical sectional view taken along the axis of a lead screw in a gearbox mounting structure for a power seat according to still another embodiment of the present invention.

13 is a schematic front view of the gearbox mounting structure of the power seat shown in FIG.

FIG. 14 is an end view taken along the line DD of FIG.

FIG. 15 is an end view taken along the line EE of FIG.

[Explanation of symbols]

 10, 110, 210 Power seat gear box mounting structure 12, 112, 212 Gear box 14 Lead screw 16, 116, 216 Rail body of power slide 22 (22-1, 22-2) Connecting member 28 Nut block (receiving member ) 30 Drive mechanism 32, 132, 232 Upper rail 23a, 132a, 232a Horizontal wall 23b, 132b, 232b A pair of vertical walls 36, 136, 236 Lower rail 40, 140 Step 42 Protrusion 44 Fitting hole 48 Spring pin (locking) Member) 52 (52-1, 52-2) connecting member 64 locking pin (locking member) 66 protruding piece 68 drive mechanism 70 lead screw 72 (72-1 to 72-3) connecting member 74 cylindrical nut (receiver) Material) 80, 81 Bracket (fixed material) 90 Spring pin (locking material)

Claims (9)

[Claims] 1. A drive mechanism comprising a combination of a lead screw operatively connected to a motor output shaft via a gear box and a receiving member into which the lead screw is screwed, has a substantially H-shaped upper rail. In the power seat in which the target seating posture control device is operably arranged with respect to the power slide rail body that is slidably installed in the corresponding lower rail, the gearbox is the lead screw extended from the gearbox. It is divided into two parts, the right half part and the left half part, by vertical division along the axis. It is assembled under the connection of the right half part and the left half part by the connecting members at at least two places separated in the axial direction of the lead screw. , The gear box is formed with a width that allows it to be inserted and inserted between a pair of vertical walls of the upper rail of approximately H shape, and A step portion which can be engaged with the end of the horizontal wall of the rail is provided on at least one of the upper surface and the lower surface of the gear box, and the upper rail is inserted between the pair of vertical walls and locked at one position after the interposition. A gearbox mounting structure for a power seat, characterized in that the gearbox is fixed to the upper rail by locking with a member and engagement of a step portion with a horizontal wall end of the upper rail. 2. The gear box is formed with a protrusion on the same surface as the step portion, and a fitting hole into which the protrusion can be fitted is provided at a corresponding position on the horizontal wall of the upper rail. 1. The power seat gear box mounting structure according to 1. 3. One of the two connecting members of the gearbox is formed in a pipe shape, and the pipe-shaped connecting member is inserted into the corresponding insertion hole and the end of the gearbox is caulked. Insertion holes that can be aligned with the hollow portion of the pipe-shaped connecting member are provided in the pair of vertical walls of the upper rail, respectively, while the portions are connected, and the hollow portion of the pipe-shaped connecting member is inserted through the insertion hole. 3. The gearbox mounting structure for a power seat according to claim 1, wherein the gearbox can be fixed to the upper rail by fitting the locking member. 4. A drive mechanism comprising a combination of a lead screw operably connected to an output shaft of a motor via a gear box and a receiving member into which the lead screw is screwed, has a substantially H-shaped upper rail. In the power seat in which the target seating posture control device is operably arranged with respect to the power slide rail body that is slidably installed in the corresponding lower rail, the gearbox is the lead screw extended from the gearbox. It is divided into two parts, the right half part and the left half part, by vertical division along the axis. It is assembled under the connection of the right half part and the left half part by the connecting members at at least two places separated in the axial direction of the lead screw. , The extension side of at least the lead screw of the gear box is partially inserted between the pair of vertical walls of the upper rail,
A step portion that is formed to have an interposable lateral width and that can be engaged with a pair of vertical wall terminals of the upper rail is provided on both the left and right side surfaces of the gear box on the extension side of the lead screw. By inserting the corresponding portion between the pair of vertical walls, locking by the locking means at one place after the interposition, and engaging the stepped portion with the vertical wall end of the upper rail,
The power seat gearbox mounting structure is characterized by fixing the gearbox to the upper rail. 5. The upper rail of the rail body is formed integrally with an engaging piece protruding outward, and a guide groove for slidably holding the engaging piece is provided on the corresponding lower rail. 5. The gearbox is formed by integrally having protruding pieces on left and right side surfaces that are slidable in the guide groove of the lower rail.
Gearbox mounting structure for the described power seat. 6. One of the two connecting members of the gear box, which is covered by the space between the vertical walls of the upper rail.
A pipe-shaped connecting member is used as the connecting member at each position, and the pipe-shaped connecting member is connected to the corresponding insertion hole by caulking the pipe-shaped connecting member and the end of the gear box is connected to the hollow portion of the pipe-shaped connecting member. Possible insertion holes
The gear box can be fixed to the upper rail by fitting the locking member, which is provided on each of the pair of vertical walls of the upper rail, into the hollow portion of the pipe-shaped connecting member through the insertion hole. Gearbox mounting structure for the described power seat. 7. A drive mechanism comprising a combination of a lead screw operably linked to a motor output shaft through a gear box and a receiving member into which the lead screw is screwed, has a substantially H-shaped upper rail. In the power seat in which the target seating posture control device is operably arranged with respect to the power slide rail body that is slidably installed in the corresponding lower rail, the gearbox is the lead screw extended from the gearbox. It is divided into two parts, the right half part and the left half part, by vertical division along the axis. It is assembled under the connection of the right half part and the left half part by the connecting members at at least two places separated in the axial direction of the lead screw. , The gear box can be inserted and inserted between a pair of vertical walls of the approximately H-shaped upper rail, depending on at least the mounting angle. The upper part of the gearbox is vertically formed with respect to the upper rail by inserting the upper rail between the pair of vertical walls and pivotally supporting it with one locking member after the interposition. A power seat gearbox mounting structure that is mounted so that it can swing. 8. One of the two connecting members of the gearbox is formed in a pipe shape, and the pipe-like connecting member is inserted into the corresponding insertion hole and the end of the gearbox is caulked. Insertion holes that can be aligned with the hollow portion of the pipe-shaped connecting member are provided in the pair of vertical walls of the upper rail, respectively, while the portions are connected, and the hollow portion of the pipe-shaped connecting member is inserted through the insertion hole. The gearbox mounting structure for a power seat according to claim 7, wherein the gearbox can be pivotally attached to the upper rail by loosely inserting the locking member. 9. The receiving member to which the lead screw is screwed is a cylindrical nut pivotally attached at one end to a support arm of the seat back, and the cylindrical nut is at least vertically and horizontally located on an upper rail and a left and right upper rail. 9. The gearbox mounting structure for a power seat according to claim 7, which is movably surrounded by a predetermined fixing member fixed to the upper rail.