JPH0546543U - Power seat slide device - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents flexure of the vibration-proof elastic body that is interposed between the gearbox that constitutes the drive unit and the inner wall of the rail, and prevents displacement and rattling of the gearbox. A power seat slide device capable of preventing overload on the electric motor and the drive unit and suppressing the sound pressure to a low level to improve the operability and durability of the drive unit and the electric motor. [Structure] A gear box 40 is mounted on the inner wall of the seat-side rail 22 with an elastic body 90 for vibration damping interposed between the gear box 40 and the inner wall of the seat-side rail 22, and the gear box 40 is mounted so as to be in contact with the inner wall. When the elastic body 90 bends to the surface portion 41, the rail 2
An engagement protrusion 42 is provided which presses against the inner wall of the gear 2 to prevent the gear box 40 from being displaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention has a rail unit including a rail on a vehicle body side and a rail on a seat side that is fitted to the rail on the vehicle body side so as to be movable in the front-rear direction and supports a seat, and an outer wall of the rail unit. The present invention relates to a power seat slide device capable of fixing an electric motor and adjusting the front-rear position of a rail on the seat side with respect to a rail on the vehicle body side via a drive section mounted in the rail unit by the electric motor.

[0002]

[Prior Art]

 In this type of conventional power seat slide device, for example, there is one as shown in FIG.

That is, the drive unit that moves the seat-side rail 2 back and forth with respect to the vehicle-body-side rail 1 reduces the rotational force of the electric motor 3 that is the drive source and the electric motor 3 to the screw member 4. And a gearbox 5 for transmission. The gearbox 5 is bolted to the inner wall of the ceiling part of the seat-side rail 2 with an elastic body 6 for vibration isolation interposed between the gearbox 5 and the ceiling of the seat-side rail 2. The electric motor 3 is arranged on the side of the seat-side rail 2, and the base end of the electric motor 3 is directly attached to a gear box 5 installed inside the seat-side rail 2.

An output shaft 3a extends from a base end portion of the electric motor 3, and the output shaft 3a is directly connected to an input shaft 5a extending from a side of a gear box 5 installed in a rail 2 on the seat side. The input shaft 5a and the output shaft 3a, which are arranged so as to oppose each other linearly and are aligned in a straight line, are connected to each other in a rotationally transmittable manner.

[0005]

[Problems to be solved by the device]

 However, in such a conventional power seat slide device, due to the self-weight of the electric motor 3 mounted on the gear box 5 and the like, an elastic body for vibration isolation interposed between the gear box 5 and the seat side rail 2 is used. Since 6 is easily bent, the position of the gear box 5 is displaced, and the gear box 5 is easily shaken due to large shaking. As a result, the shaft centers of the input shaft 5a and the output shaft 3a are misaligned, an extra load is applied to the gearbox 5 and the electric motor 3, and the sound pressure of the drive unit becomes high. There is a problem that the mobility and durability are impaired.

The present invention has been made in view of the above-mentioned conventional problems, in which the elastic body for vibration isolation interposed between the gearbox forming the drive unit and the inner wall of the rail is bent. This prevents the gearbox from shifting and rattling to prevent overloading the electric motor and drive unit, while keeping the sound pressure low to improve the operability and durability of the drive unit and electric motor. It is an object of the present invention to provide a power seat slide device that can be operated.

[0007]

[Means for Solving the Problems]

 The gist of achieving the object is to support the seat (10a) by fitting the rail (21) on the vehicle body side and the rail (21) on the vehicle body side so as to be relatively movable back and forth. A drive unit having a rail unit (20a) including a seat-side rail (22), and an electric motor (80) disposed on the side of the rail unit (20a) to be installed inside the rail unit (20a). In a power seat slide device (20) capable of adjusting the front-rear position of the seat-side rail (22) with respect to the vehicle-body-side rail (21) via (30), the drive section (30) includes: A screw member (31) rotatably supported by one of the vehicle body side rail (21) and the seat side rail (22), and a screw member (31) screwed into the screw member (31) in a relatively rotatable manner, The rotational force of the nut member (32) fixed to the other of the vehicle body side rail (21) and the seat side rail (22) and the electric motor (80) is decelerated and transmitted to the screw member (31). The gear box (40) is provided with a gear box (40), and the gear box (40) is provided with an elastic body (90) for vibration isolation between the gear box (40) and the inner wall of the one rail (22). 22) is attached to the inner wall of the one rail (22), and one of the mounting surfaces (41) of the gear box (40) facing the inner wall of the one rail (22) bends the elastic body (90), A power seat slide device (20), characterized in that an engagement protrusion (42) is provided which presses against the other of the inner wall and the mounting surface (41) and prevents the gear box (40) from being displaced. Exist in.

[0008]

[Action]

 Anti-vibration that is interposed between the gearbox (40) that constitutes the drive unit (30) and the inner wall of one rail (22) that constitutes the rail unit (20a) equipped with the gearbox (40) Of the elastic body (90) of one of the rails (22) and the mounting surface (41) of the gear box (40) that is in contact with the inner wall of the one rail (22) when it is bent more than necessary. The mating protrusion (42) presses against the other of the inner wall and the mounting surface (41).

By engaging the engagement protrusion (42) with the inner wall of one rail (22) or the mounting surface (41) of the gearbox (40), the engagement protrusion (42) between the gearbox (40) and the rail (22) is pressed. The deformation of the elastic body (90) due to the bending is suppressed within a certain range, and the gear box (40) does not rattle so as to largely swing due to the bending of the elastic body (90).

As a result, the elastic body (90) normally maintains the vibration damping property to prevent the generation of abnormal noise, while the elastic member (90) is subjected to a bending load, the engaging protrusion (42 ), The mounting position of the gear box (40) on one rail (22) can be fixed.

Since the engagement protrusions (42) prevent the gear box (40) from being displaced or rattling, an excessive load is applied to the gear box (40) and the electric motor (80). In addition, the sound pressure of the drive unit (30) can be kept low.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention.

As shown in FIGS. 1 and 3, the power seat slide device 20a includes a pair of rail units 20a, 20a for supporting the seat 10a, a drive unit 30 installed in each rail unit 20a, It is provided with an electric motor 80, which is a drive source, disposed on the side of one rail unit 20a.

The seat 10a is attached to an installation portion of the vehicle body floor 10 via a power seat slide device 20a so that its front-rear position can be adjusted. The rail unit 20a is fitted to the vehicle body side rail 21 fixed to the vehicle body floor 10 via the leg members 12 and 13 and the vehicle body side rail 21 so as to be movable back and forth and directly supports the seat 10a. It is composed of a seat side rail 22.

As shown in FIGS. 1 and 2, the rail 21 on the vehicle body side is formed in a groove-shaped cross section, and has a bottom surface portion 23 and both side wall portions 24, 24. Similarly, the seat-side rail 22 is formed in a groove-shaped cross section, and has a ceiling portion 25 and side wall portions 26, 26.

The opening of the rail 21 on the vehicle body side and the opening of the rail 22 on the seat side are combined to form a bottom portion 23 and both side wall portions 24, 24 of the rail 21 on the vehicle body side, and a ceiling portion 25 of the rail 22 on the seat side. A space 20b is formed by being surrounded by the side wall portions 26, 26. In particular, the front end of the ceiling portion 25 of the seat-side rail 22 is raised to form the storage chamber 20c of the gear box 40. The side frame member is provided on the ceiling portion 25 of the seat-side rail 22. 70 is fixed by a bolt 91 via a mounting bracket 72. The side frame members 70 are provided on both sides of a seat cushion that constitutes the seat 10a, and a pipe frame member 71 is installed between the front ends of the side frame members 70.

The mounting bracket 72 is formed in a substantially L-shaped cross section, and more specifically, a fixing piece portion 74 along the ceiling portion 25 of the rail 22 on the seat side and an end edge of the fixing piece portion 74 are formed. The standing piece portion 73 is bent at a right angle. Engaging protrusions 75, 75 protruding downward are formed at both ends of the fixing piece portion 74.

As shown in FIG. 2, the standing piece portions 73 of the mounting bracket 72 are welded to the front and rear lower portions of the side frame member 70. On the other hand, the fixing piece 74 of the mounting bracket 72 is fixed to the front and rear of the ceiling portion 25 of the rail 22 on the seat side with bolts 91, 91.

A drive unit 30 is installed in the space 20b and the storage chamber 20c of the rail unit 20a. As shown in FIG. 1, the drive unit 30 reduces the rotational force of the electric motor 80, the screw member 31 extending in the front-rear direction, the nut member 32 rotatably engaged with the screw member 31, and the rotational force of the electric motor 80. And a gear box 40 for transmitting to the screw member 31.

The gearbox 40 is housed in the storage chamber 20c, and the inner wall of the ceiling portion 25 is provided with the elastic body 90 for vibration isolation interposed between the gearbox 40 and the inner wall of the ceiling portion 25 of the rail 22 on the seat side. It is attached with a bolt 91.

A pair of tubular portions 44, 44 into which the bolts 91, 91 are screwed are formed on the mounting surface portion 41 of the gear box 40 that contacts the inner wall of the ceiling portion 25 of the seat-side rail 22. There is. As shown in FIGS. 1 and 2, a ring-shaped elastic body 90 is fitted around the outer circumference of the tubular portion 44.

Further, at the four corners of the mounting surface portion 41 of the gear box 40, when the lower portion of the elastic body 90 between the mounting surface portion 41 and the inner wall of the ceiling portion 25 is bent, the elastic body 90 is pressed against the inner wall of the ceiling portion 25. Are provided with engaging projections 42, 42, ... For preventing the vertical displacement of the gear box 40.

As shown in FIG. 1, the elastic body 90 is fitted into the cylindrical portion 44 of the gear box 40 and the mounting hole 28 of the ceiling portion 25 at the same time, and is attached to the upper surface of the ceiling portion 25 by the bolt 91. It is sandwiched between a fixed mounting bracket 72 and a mounting surface portion 41 of the gearbox 40 mounted on the inner wall of the ceiling portion 25 with a bolt 91.

At this time, the engaging projections 75 of the fixing piece portion 74 of the mounting bracket 72 are strongly pressed against the upper surface of the ceiling portion 25, while the engaging projections 42 of the mounting surface portion 41 of the gear box 40 are It faces the inner wall of the ceiling portion 25 with a slight gap.

Inside the gear box 40, a worm 50 that is directly driven to rotate by an electric motor 80 and a worm wheel 60 that meshes with the worm 50 and rotates are installed. The worm 50 is rotatably supported by front and rear bearing members 52, 52.

The input shaft 51 of the worm 50 extends to the side of the gear box 40 from one bearing member 52, and the side surface of the gear box 40 on the side of the input shaft 51 surrounds the input shaft 51. Thus, a fitting cylinder portion 45 is formed so as to project toward the side wall portion 26 of the rail 22.

Mounting holes 27 a, 27 a for fixing the electric motor 80 to the outer wall of the side wall portion 26 are formed in the side wall portion 26 on the inner side of the seat-side rail 22 at intervals. An insertion hole 27 for guiding the output shaft 82 of the electric motor 80 arranged on the side of the rail unit 20a into the inside of the rail unit 20a is formed between the mounting holes 27a, 27a.

The electric motor 80 is arranged on the outer wall of the side wall portion 26 of the rail 22 on the seat side in which the insertion hole 27 and the mounting holes 27 a, 27 a are formed. A fixed bracket 81 is integrally provided at the base end of the electric motor 80.

A bearing hole continuous with the inside of the motor is formed on the end surface of the fixed bracket 81, and the output shaft 82 extends through the bearing hole. Further, on the end surface of the fixed bracket 81, a cylindrical mounting portion 83 extending from the peripheral edge of the bearing hole is formed so as to surround the extended output shaft 51.

Screw insertion holes 85 are formed at both ends of the fixed bracket 81. As shown in FIG. 1, the electric motor 80 is fixed to the outer wall of the side wall portion 26 of the seat-side rail 22 through fixing screws 87, 87 fitted in the screw insertion holes 85 and well nuts 86, 86. ing.

The tubular mounting portion 83 of the electric motor 80 passes through the insertion hole 27 of the seat-side rail 22 and directly engages with the gear box 40 installed in the seat-side rail 22. A flexible wire 88 connected to the output shaft 82 extends from the tip of the electric motor 80 toward the other rail unit 20a.

More specifically, the tubular mounting portion 83 of the electric motor 80 is fitted into the fitting tubular portion 45 of the gear box 40 through the insertion hole 27 of the rail 22. Further, the output shaft 82 inside the tubular mounting portion 83 is formed in an annular cross section, and the tip of the output shaft 82 is externally fitted to the tip of the input shaft 51 of the worm 50 inside the fitting tubular portion 45 to integrally form. It is rotatably connected.

As shown in FIG. 2, the nut member 32, which constitutes the drive unit 30 together with the gear box 40, is fixed to the bottom surface portion 23 of the rail 21 on the vehicle body side by a bolt 32 a so as not to move forward and backward and to rotate. ing. The screw member 31 with which the nut member 32 is relatively rotatably screwed is rotatably supported by the seat-side rail 22 so as to extend in the longitudinal direction.

As shown in FIG. 1, the front end portion of the screw member 31 is inserted into the gear box 40 and fixed to a worm wheel 60 incorporated in the gear box 40. On the other hand, as shown in FIG. 2, the rear end of the screw member 31 is rotatably supported on the inner wall of the ceiling portion 25 of the seat-side rail 22 via a bearing member 33.

A stopper member 34 is fitted on the front end side of the screw member 31 to contact the front end surface of the nut member 32 and regulate the rearward moving end of the screw member 31. Similarly, on the rear end side of the screw member 31, a stopper member 34a that abuts on the rear end surface of the nut member 32 and restricts the forward moving end of the screw member 31 is fitted.

Next, the operation will be described. As shown in FIG. 1, in assembling the power seat slide device 20, first, the electric motor 80, which is the driving source, is fixed to the outer wall of the side wall portion 26 of the rail 22 on the seat side, while the driving portion 30 is configured. The gear box 40 that reduces the rotational force of the electric motor 80 is installed in the rail unit 20a.

As shown in FIG. 2, when the electric motor 80 and the gearbox 40 are mounted on the seat-side rail 22, the shaft center of the output shaft 82 of the electric motor 80 is the shaft of the input shaft 51 on the gearbox 40 side. Align the cores exactly and then connect them together.

When the gearbox 40 is mounted on the inner wall of the ceiling portion 25 of the seat-side rail 22, when the engagement protrusion 42 of the mounting surface portion 41 of the gearbox 40 leaves a slight gap, The lower portion of the elastic body 90 fitted to the tubular portion 44 is interposed between the mounting surface portion 41 and the inner wall so as to face the inner wall, and is fixed by the bolt 91.

Normally, since the engagement protrusion 42 of the gearbox 40 is not engaged with the inner wall of the ceiling portion 25 of the rail 22 on the seat side, the elastic body 90 damps the vibration of the gearbox 40, and The resonance of the rail 22 on the side is suppressed, and the generation of abnormal noise can be prevented.

On the other hand, when a large load is applied to the gear box 40 due to the weight of the electric motor 80 or the like and the elastic body 90 tries to bend more than necessary, the engagement protrusion 42 of the mounting surface portion 41 of the gear box 40 causes the seat side to move. It is pressed against the inner wall of the ceiling portion 25 of the rail 22.

As a result, the deformation of the elastic body 90 due to the bending caused by the load applied to the gear box 40 is suppressed within a certain range, and the gear box 40 rattles so that the elastic deformation of the elastic body (90) causes the gear box 40 to swing greatly in the vertical direction. There is no such thing.

Further, the mounting bracket 72 of the side frame member 70 is fixed to the upper surface of the ceiling portion 25 of the rail 22 on the seat side by the bolt 91 with the upper portion of the elastic body 90 fitted in the tubular portion 44 interposed. However, at this time, since the engaging projections 75, 75 are strongly pressed against the upper surface of the ceiling portion 25, the rattling of the gear box 40 in the rail unit 20b in the left-right direction can be suppressed.

As a result, the mounting position of the gearbox 40 can be fixed, positional deviation and rattling can be eliminated, and shake of the output shaft 82 and the input shaft 51 during operation can be prevented. Sound pressure can be suppressed to a low level, and since the electric current value does not increase and the electric motor 80 is not overloaded, the operability and durability of the electric motor 80 and the drive unit 30 can be improved.

As shown in FIGS. 1 and 2, the rotational torque of the output shaft 82 of the electric motor 80 is directly transmitted to the input shaft 51 of the worm 50 in the gearbox 40, and the worm 50 in the gearbox 40 and the worm 50. The direction of rotation is changed by the fitting relationship of the wheels 60, and the screw member 31 is driven to rotate.

Since the nut member 32 is non-rotatably and immovably fixed to the rail 21 on the vehicle body side, when the screw member 31 rotates, the screw member 31 is gradually fed in the front-rear direction by the nut member 32.

As a result, in FIG. 3, the seat-side rail 22 moves in the front-rear direction with respect to the vehicle-body-side rail 21, and the seat 10a moves in the front-rear direction with respect to the vehicle body floor 10. Can be adjusted.

Although the engaging projection is provided on the mounting surface of the gear box in the above-described embodiment, the engaging projection may be provided on the inner wall of the ceiling of the seat-side rail instead of the mounting surface of the gear box. Good. Further, while the nut member is provided on the rail side on the seat side, the screw member may be provided on the rail on the vehicle body side.

[0048]

[Effect of the device]

 According to the power seat slide device of the present invention, the gearbox forming the drive unit is mounted on the inner wall of the rail by interposing the elastic body for vibration isolation between the inner wall of the rail and the inner wall of the rail. And an engaging projection is provided on one of the mounting surfaces of the gearbox that is in contact with the inner wall to prevent displacement of the gearbox by pressing against the other of the inner wall and the mounting surface when the elastic body bends. , It is possible to prevent the gearbox from being misaligned or rattling due to the flexure of the elastic body, so that the electric motor and the driving part are not overloaded and the sound pressure can be kept low. It is possible to improve the operability and durability of the drive unit and the electric motor.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a power seat slide device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an entire power seat slide device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a seat equipped with a power seat slide device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a conventional power seat slide device.

[Explanation of symbols]

 10a ... Seat 20 ... Power seat slide device 20a ... Rail unit 21 ... Vehicle side rail 22 ... Seat side rail 25 ... Ceiling part 28 ... Mounting hole 30 ... Drive part 31 ... Screw member 32 ... Nut member 40 ... Gearbox 41 ... Mounting surface part 42 ... Engaging protrusion 50 ... Worm 51 ... Input shaft 60 ... Worm wheel 70 ... Side frame member 72 ... Mounting bracket 75 ... Engaging ridge 80 ... Electric motor 82 ... Output shaft

Claims (1)

[Scope of utility model registration request] 1. A rail unit having a rail on the vehicle body side and a rail on the seat side which is fitted to the rail on the vehicle body side so as to be movable in the front-rear direction to support a seat, and the rail unit side. In a power seat slide device capable of adjusting the front-rear position of the seat-side rail with respect to the vehicle-body-side rail via a drive section that is installed in the rail unit by an electric motor disposed in one direction, the drive section is A screw member rotatably supported by one of the vehicle body side rail and the seat side rail, and a screw member rotatably engaged with the screw member relatively to the screw member, and the other one of the vehicle body side rail and the seat side rail. It has a fixed nut member and a gearbox that reduces the rotational force of the electric motor and transmits it to the screw member. The elastic body is attached to the inner wall of the one rail with an elastic body interposed between the inner wall and the inner wall of the one rail, and the elastic body is attached to one of the inner wall of the one rail and the mounting surface of the gearbox that is in contact with the inner wall. A power seat slide device, comprising: an engaging projection that presses against the other of the inner wall and the mounting surface when the plate flexes to prevent the gear box from being displaced.