JPH08207628A - Bearing structure for seat position regulator for vehicle - Google Patents

Abstract

PURPOSE: To provide an excellent assembling property for a shaft member so as to suppress a backlash in the axial direction without requiring any high precision for a part. CONSTITUTION: In a seat position regulator for a vehicle, in which a seat is lifted/lowered via a link by means of rotation of shaft members 40, 42 suspended freely rotationally by bearing parts individually integrated with a pair of right and left sliding members, outer circumference grooves 41, 43 are formed in the predetermined positions in the shaft members 40, 42 all along the circumference direction. For bearing parts 4c, 3b, at least two divided parts are combined, and at least one of them constitutes supporting holes 25, 26, 30, 31 which are fitted in the outer circumference grooves 41, 43 of the shaft member 40, 42 so as to support them freely rotationally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing structure for a rotary shaft member in a vehicle seat position adjusting device.

[0002]

2. Description of the Related Art Generally, a seat position adjusting device for a vehicle is adapted to adjust a front and rear position of a seat, an upper and lower position of a seat, a tilt angle of a seat back, etc. A seat is provided on a possible pair of left and right sliding rails via an elevating mechanism.

An example of such a seat position adjusting device (Japanese Patent Laid-Open No. 6-68242)
No. 2-227830) is shown in FIG. Upper rails 02, 02 are slidably engaged in the front-rear direction with a pair of left and right lower rails 01, 01 attached to the vehicle body side. Base brackets 03, 03 are opposed to the upper rails 02, 02 so as to face each other. Are attached via a pair of front and rear links 04, 05 so that they can be moved up and down.

The left and right links 04, 04 on the front side are fitted and connected integrally to a rod 06, and both ends of the rod 06 are rotatably supported by the left and right base brackets 03, 03, respectively. The lower ends of links 04, 04 are upper rails 02, 02
The link 04 on the right side has a bell crank shape, and the end extending rearward is pivotally attached to one end of the arm 07.
The other end of the arm 07 is pivotally attached to a cam plate 08 rotatably supported by the base bracket 03, and the cam plate 08 is rotated via a spring coupler 09 by the swing of the lever 010.

On the other hand, a rod 020 is rotatably mounted between the front ends of the left and right base brackets 03, a link 021 is fitted to the left end of the rod 020, and a sector gear 022 is fitted to the right end. The links 023 and 024 are pivotally attached to the link 021 and the sector gear 022, respectively. A gear 025 is meshed with the sector gear 022, and the rotation of a dial 027 provided on the base bracket 03 is transmitted to the gear 025 via a spring coupler 026. Sheet 030
Is located between the left and right base brackets 03, 03, and the rear part is pivotally supported by utilizing the holes 03a, 03a of the base brackets 03, 03, and the front part is pivotally attached to one end of the links 023, 024.

[0006] Generally, the lever is constructed as described above.
When 010 is operated, the rod 06 rotates via the spring coupler 09, the cam plate 08, the arm 07, and the link 04, and the rod 06
Can rotate the left and right links 04, 04 and can lift the left and right base brackets 03, 03 together with the links 05, 05. If you operate dial 027 again, the spring coupler
The rod 020 is rotated via 026, the gear 025, and the sector gear 022, and the rod 020 is connected to the left and right links 021 and the sector gear 02.
2 is turned as a unit and seats 030 through links 023 and 024.
Swing the front part of the up and down.

When the sheet is moved up and down in this way,
Rotate rod 06,02 to move left and right equally up and down
0 is usually installed on the left and right base brackets 03, 03.

[0008]

[Problems to be Solved] Looking at the bearing structure of the rods 06 and 020, both ends of the rods 06 and 020 are fitted into the support holes provided in the left and right base brackets 03 and 03, and are rotatably supported. The E-ring 040 is engaged with the outer peripheral groove formed on the projecting portion to position and prevent the rods 06 and 020 from coming off. Since the rods 06 and 020 are axially positioned by the E-ring 040, high dimensional accuracy of parts is required to prevent the rods 06 and 020 from rattling in the axial direction.

That is, the dimension between the outer side surfaces of the left and right base brackets 03, 03 and the dimension between the outer peripheral grooves at both ends of the rods 06, 020 must match with high accuracy, which increases the manufacturing cost and increases the axial direction. If the rattling of the rods is suppressed, the rods fitted into the support holes of the left and right base brackets 03, 03
It becomes difficult to engage the E-ring 040 with the outer peripheral groove of 06, 020, and the assembling property deteriorates.

The present invention has been made in view of the above points, and a purpose thereof is to provide a vehicle member which is excellent in assembling ability of a shaft member and which can suppress rattling in an axial direction without requiring high precision of parts. The point is to provide the bearing structure of the seat position adjusting device.

[0011]

In order to achieve the above object, the present invention uses a link by the rotation of a shaft member rotatably mounted on a bearing unit which is integral with a pair of left and right sliding members. In a vehicle seat position adjusting device in which a seat moves up and down, an outer peripheral groove is formed at a predetermined position of the shaft member in the circumferential direction, and the bearing portion is formed by combining at least two divided parts of the outer peripheral groove of the shaft member. The bearing structure of the vehicle seat position adjusting device is configured to have a support hole that is rotatably supported by being fitted into the.

Since the bearing portion is divided, the outer peripheral groove of the shaft member is fitted into one of the supporting holes in the divided state, and the other supporting hole is fitted into the outer peripheral groove later to form a complete supporting hole. As a result, the shaft member can be rotatably supported, and the assembling is easy and the assembling property is very good. Since the outer peripheral groove of the shaft member fits into the support hole of the bearing portion, there is no rattling in the axial direction of the shaft member.

One of the left and right bearing portions is a support hole that is not divided, and one end of the shaft member is rotatably fitted therein. The outer peripheral groove is formed at the other end of the shaft member, and the outer peripheral groove is formed in the other bearing portion. The divided lower support holes are fitted and supported, and the upper support holes are fitted from above to rotatably support the shaft member, so that the shaft member has one end fitted in one support hole and the other end Since it is sufficient to fit the outer peripheral groove formed only in the other support hole,
It is easy to assemble and does not require high dimensional accuracy of parts.

A housing plate integrally connects between the left and right sliding members and base brackets mounted integrally with each other, and one undivided support hole of the left and right bearing portions is formed in the housing plate, and the other support is formed. By forming the lower support hole of the hole by the housing plate and the upper support hole by the base bracket,
Insert one end of the shaft member into the support hole of the housing plate, and fit the outer peripheral groove of the other end into the lower support hole of the same housing plate from above to fit the upper support hole of the base bracket when mounting the base bracket to the housing plate. If the shaft member is fitted in the outer peripheral groove of the shaft member, the shaft member is rotatably supported without rattling in the axial direction, and the assembly is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 to 9 will be described below. FIG. 1 is a perspective view showing a vehicle seat drive mechanism of this embodiment. Sliding rails 2 and 2 are slidably fitted and supported on a pair of left and right fixed rails 1 and 1 fixed to the vehicle body frame and oriented in the front-rear direction, and base brackets are attached to the respective slide rails 2 and 2. Three
3 is fixed, a housing plate 4 is installed between the left and right base brackets 3, 3, and a mechanism for moving the seat up and down is supported on the housing plate 4.

A front and rear movement motor 6 is supported on a support plate 5 which is installed between the front end portions of the left and right base brackets 3, 3, and the left and right sliding rails 2, 2 are fixed rails when the front and rear movement motor 6 is driven. The seat can be moved back and forth along 1, 1 to adjust the seat back and forth.

A reclining motor 7 is disposed on the right base bracket 3 and a tilting arm 10 is pivotally supported by a support shaft 9 sandwiched by a cover plate 8 at the rear portion of the base bracket 3 for tilting the same. arm
A seat back is integrally fixed to 10. Driving of the reclining motor 7 causes the tilting arm 10 to tilt together with the seat back via a power transmission member 11 such as a gear.

The seat vertical movement mechanism arranged on the housing plate 4 will be described below. As shown in FIG. 7, the housing plate 4 is formed such that the left and right ends of a substantially horizontal plate 4a are bent upward so that side plates 4b and 4c face each other, and the front edge of the horizontal plate 4a is formed. The left and right parts of the bearings extend upward to form bearing portions 4d and 4e.

Circular support holes 20 and 21 are formed at predetermined positions in the front and rear of the left side plate portion 4b, and nuts 22 and 23 are fixed to the front and rear mounting holes (see FIG. 3). Further, semicircular lower support holes 25, 26 are formed at the upper edge of the other right side plate portion 4c so as to correspond to the support holes 20, 21, and nuts 27, 28 are provided inside the front and rear mounting holes, respectively. Are fixed (see FIG. 3).

The right-side base bracket 3 has a board 3a on which the front half part is slightly bulged inward so that the reclining motor 7 can be mounted. A part of the board 3a is further inwardly rectangular and is substantially formed. Bearing plate 3 bulges out by the thickness of the plate
b is formed (see FIGS. 8 and 9). The lower part of the bearing plate 3b is missing, and a semicircular upper support hole 3 is formed at the lower end edge.
0 and 31 are formed corresponding to the lower support holes 25 and 26 opened above the housing plate 4, and the substrate 3a
Mounting holes 32, 33 are formed in the holes corresponding to the nuts 27, 28.

On the other hand, the left and right side plate portions 4 of the housing plate 4
A shaft which is a shaft member installed in parallel between b and 4c.
40 and 42 have a cylindrical shape, and outer peripheral grooves 41 and 43 having a groove width substantially equal to the plate thicknesses of the housing plate 4 and the base bracket 3 are formed on the right outer peripheral surface in the circumferential direction.

On the front shaft 40, swinging pieces 40a, 40b are provided at predetermined positions near the left side so as to project at an angle of 90 degrees from each other.
The oscillating piece 40c that is provided at a position closer to the right side is the oscillating piece 40c.
It is paired symmetrically with 40b. Further, on the rear shaft 42, rocking pieces 42a and 42b are projected at the same position on the right side, and the rocking piece 42c projected on the left side is symmetrical to the rocking piece 42b. In pairs.

The shafts 40 and 42 have their left ends fitted into the support holes 20 and 21 of the left side plate portion 4b of the housing plate 4, respectively, and the outer peripheral grooves 41 and 43 at the right end below the right side plate portion 4c of the housing plate 4. The shafts 40 and 42 are rotatably supported by being fitted into the side support holes 25 and 26, respectively (see FIG. 2).

When the right side base bracket 3 is mounted on the right side plate portion 4c of the housing plate 4, the outer peripheral grooves 41 of the shafts 40, 42 are attached to the lower portion of the rectangular bearing plate 3b which bulges inward of the base bracket 3. The right end is exposed from 43, the substrate 3a is brought into contact with the outer surface of the right side plate portion 4c of the housing plate 4, and the upper support holes 30 and 31 formed in the lower end edge of the bearing plate 3b are connected to the outer peripheral grooves 41 of the shafts 40 and 42. 43 are fitted from the upper side to the upper bearings of the shafts 40 and 42, respectively, and the bolts 35 and 36 are penetrated from the outer side of the base bracket 3 to the mounting holes 32 and 33, and the nut 27 of the right side plate portion 4c of the housing plate 4, Screw to 28 and tighten.

Thus, the right side base bracket 3 is attached to the right side plate portion 4c of the housing plate 4 so that the shafts 40 and 42 are rotatably supported, and the outer peripheral grooves 41 and 43 at the right end are supported as shown in FIG. Lower support holes 25, 26 of the side plate portion 4c
The support holes formed by combining the upper support holes 30 and 31 of the base bracket 3 with each other are fitted to firmly fix the positions of the shafts 40 and 42. Outer peripheral groove 41 of shafts 40, 42,
Since the groove width of 43 is substantially equal to the plate thickness of the side plate portion 4c of the housing plate 4 and the bearing plate 3b of the base bracket 3, there is no rattling in the axial direction of the shafts 40 and 42 due to the fitting of both.

In this way, a seat front raising / lowering motor 50 and a seat rear raising / lowering motor 51 are arranged on the horizontal plate portion 4a of the housing plate 4 behind the shaft 42 mounted on the housing plate 4. Seat lift motor 50
The seat rear raising / lowering motor 51 is arranged on the left and right with a slight shift in the front / rear direction, and gear cases 52 and 53 are integrally fixed to the opposite sides thereof.

In the gear case 52, as shown in FIG. 5, the worm wheel 54a meshes with the worm gear 50a fitted to the drive shaft of the seat front elevation motor 50, and the screw shaft 54 fitted with the worm wheel 54a. Extends forward and the tip is pivotally supported by a bearing piece 4d at the front edge of the housing plate 4. Similarly in the right gear case 53, a worm gear fitted to the drive shaft of the seat rear-side lifting motor 51 and a worm wheel (not shown) mesh with each other, and the screw shaft 55 fitted to the worm wheel is fitted to the front. The front end of the housing plate 4 is axially supported by the bearing piece 4e at the front edge of the housing plate 4.

A nut member 56 is attached to the left and right screw shafts 54, 55.
57 are respectively screwed together, and nut holders 58 and 59 fitted to the nut members 56 and 57 and swinging pieces 40a and 42a protruding from the shafts 40 and 42 are link members 60 and 61, respectively.
Are connected by (see FIGS. 5 and 6).

FIG. 5 is a sectional view showing the lifting mechanism on the front side of the seat, and the link member 60 has a nut holder at its rear end.
The rocking piece is pivotally attached to the 58 by a pin 65, and the front end is pivotally attached to the tip of the rocking piece 40a by a pin 66. The rocking piece is provided on the shaft 40 at an angle of 90 degrees with the rocking piece 40a. A link member 68 is pivotally attached to the tip of 40b by a pin 67.
A seat support member 70 pivotally attached to the other end of 68 via a pin 69.
Are fixed to the front edge of the sheet. The sheet supporting member 72 is similarly connected to the oscillating piece 40c paired with the oscillating piece 40b through the link member 71, and the sheet supporting member 72 supports the front end of the sheet.

With the above-described link structure, when the motor 50 for raising and lowering the seat front is driven, the screw shaft 54 is rotated by the meshing of the gears and the nut member 56 is moved back and forth together with the nut holder 58, and the link member 60 is interposed. To rotate the shaft 40. When the shaft 40 is rotated, the pair of right and left swing pieces 40b and 40c are vertically swung, and the seat front portion can be vertically moved up and down together with the seat supporting members 70 and 72 via the link members 68 and 71.

FIG. 6 is a cross-sectional view showing the lifting mechanism on the rear side of the seat, and the link member 61 has a nut holder at its rear end.
59 is pivoted by a pin 75, and the front end is pivotally attached by a pin 76 to the tip of the rocking piece 42a. The rocking piece 42b projecting from the shaft 42 at the same angle as the rocking piece 42a. A long link member 78 is pivotally attached to the front end by a pin 77 at the front end, and the link member 78 extends rearward.

At the rear, a swing link member 80 is pivotally supported by a support shaft 81 on the base bracket 3 so as to be swingable. The swing link member 80 is an outer plate portion pivotally supported by the base bracket 3. A connecting portion 80c connects 80a and an inner plate portion 80b pivotally attached to the rear end of the link member 78 by a pin 83,
The outer side plate portion 80a and the inner side plate portion 80b are substantially V-shaped in a side view.

A seat support member 85 is pivotally attached to the end of the inner side plate portion 80b of the swing link member 80 on the side of the connecting portion 80c by a pin 84, and the seat support member 85 is fixed to the lower surface of the rear portion of the seat. Supports the rear of the seat. The swing link member 87 is also symmetrically supported by the support shaft 88 on the other left side base bracket 3 as well, and the swing link member 87 and the swing piece of the shaft 42 are pivotally supported.
A long link member 86 is connected to 42c, while a seat support member 89 is pivotally attached to the swing link member 87, and the seat support member 89 is fixed to the lower surface of the rear part of the seat to support the rear part of the seat. However, it has a symmetrical structure.

Therefore, when the motor 51 for raising and lowering the seat rear side is driven, the screw shaft 55 is rotated by the meshing of gears and the nut member is rotated.
57 moves back and forth together with nut holder 59, and link member 61
The shaft 42 is rotated via. When the shaft 42 is rotated, the pair of left and right swing pieces 42b and 42c are swung back and forth to form a link member.
The swing link members 80, 87 are swung around the support shafts 81, 88 via 78, 86, and the swing link members 80, 87 swing up and down the seat supporting members 85, 89 along the rear portion of the seat. Can be made.

When the seat front elevation motor 50 is driven by the link mechanism as described above, the front portion of the seat moves up and down, and when the seat rear elevation motor 51 is driven, the seat rear portion moves up and down.

The shaft 40 that transmits this power,
42, when assembled, has its left end fitted into the support holes 20 and 21 of the left side plate portion 4b of the housing plate 4, respectively, and the outer peripheral grooves 41 and 43 at the right end thereof to the lower support hole 25 of the right side plate portion 4c of the housing plate 4, 26, the upper support holes 30 and 31 formed at the lower end edge of the rectangular bearing plate 3b that bulges inward of the base bracket 3 when the right side base bracket 3 is attached to the outer peripheral groove 41 of the shafts 40 and 42. , 43 are respectively fitted from the upper side to form bearings on the upper side of the shafts 40, 42, the shafts 40, 42 are easily rotatably supported, and the assemblability is excellent.

As shown in FIG. 9, the outer peripheral grooves of the shafts 40 and 42
Since the lower support holes 25 and 26 of the side plate portion 4c of the housing plate 4 and the upper support holes 30 and 31 of the bearing plate 3b of the base bracket 3 are fitted to 41 and 43, rattling of the shafts 40 and 42 in the axial direction is prevented. Has been done. Moreover, if the outer peripheral grooves 41, 43 are provided at one place at the right end of the shafts 40, 42, rattling can be prevented, so that the parts dimensions of the shafts 40, 42, the housing plate 4 and the base bracket 3 are required to have such high precision. Also, the manufacturing cost can be reduced.

In the above embodiment, the side plate portion on the housing plate side is fitted into the outer peripheral groove of the shaft from below and the bearing plate of the base bracket is fitted from above. Either one of the bearings may be fitted, and an example thereof is shown in FIG. The same example is a modification of the above-described embodiment, and FIG. 10 is a view showing the same cross section as that of FIG.

The housing plate 4 and the shaft 42 are the same as those in the above-described embodiment, and the lower support hole 26 of the side plate portion 4c of the housing plate 4 is fitted and supported from the lower side in the outer peripheral groove 43 of the shaft 42. However, the base bracket 100 has a bearing plate 3b further bulging from the base plate 3a of the above-mentioned embodiment.
However, a part corresponding to the substrate 3a is partially removed to form the bearing plate 100a, and a semicircular upper support hole 101 is formed at the lower end edge of the bearing plate 100a.

Therefore, the bearing plate of the base bracket 100
100a directly contacts the side plate portion 4c of the housing plate 4, and the upper support hole 101 is fitted from above to the outer peripheral surface of the outer peripheral groove 43 of the shaft 42 from above. The lower support hole 26 of the shaft 42 is simply fitted into the outer peripheral groove 43 of the shaft 42, but rattling in the axial direction is prevented. Also the base bracket
The shape of 100 is also simplified and the manufacturing is easy, and the assembling property is good as in the previous embodiment.

[0041]

According to the present invention, since the bearing portion is divided, the outer peripheral groove of the shaft member is fitted in one supporting hole in the divided state, and the other supporting hole is fitted later in the outer peripheral groove. The shaft member can be rotatably supported by forming a complete supporting hole, and the assembling is easy and the assembling property is very good. Since the outer peripheral groove of the shaft member fits into the support hole of the bearing portion, there is no rattling in the axial direction of the shaft member.

One of the left and right bearing portions is a support hole that is not divided, and one end of the shaft member is rotatably fitted therein. An outer peripheral groove is formed at the other end of the shaft member, and the outer peripheral groove is divided into the other bearing portion. The lower support hole is fitted and supported, and the upper support hole is fitted from above to rotatably support the shaft member, so that the shaft member has one end fitted in one support hole and the other end formed only at the other end. Since it suffices to fit the groove into the other support hole, the assembling property is good and the dimensional accuracy of the parts is not so high.

One end of the shaft member is fitted into the support hole of the housing plate, and the outer peripheral groove of the other end is fitted into the lower support hole of the same housing plate from above so that the base bracket is mounted on the housing plate at the upper side. If the support hole is fitted in the outer peripheral groove of the shaft member, the shaft member is rotatably supported without rattling in the axial direction, and the assembly is easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a seat drive mechanism of an automobile according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a seat lifting mechanism on a housing plate.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view of the same.

FIG. 5 is a left sectional view showing a lifting mechanism of a front portion of a seat.

FIG. 6 is a right sectional view showing an elevating mechanism at a rear portion of the seat.

FIG. 7 is an exploded perspective view of a housing plate, a shaft, and a right base bracket.

FIG. 8 is a cross-sectional view of the right base bracket.

FIG. 9 is a cross-sectional view showing a bearing structure of a shaft end portion.

FIG. 10 is a cross-sectional view showing a bearing structure of a shaft end portion of another embodiment.

FIG. 11 is a perspective view showing a conventional seat position adjusting device.

[Explanation of symbols]

1 ... Fixed rail, 2 ... Sliding rail, 3 ... Base bracket, 4 ... Housing plate, 5 ... Support plate, 6 ...
Front-back movement motor, 7 ... Reclining motor, 8 ... Cover plate, 9 ... Support shaft, 10 ... Tilt arm, 11 ... Power transmission member, 20, 21 ... Support hole, 22, 23 ... Nut, 25, 26 ... Lower side Support holes, 27, 28 ... Nuts, 30, 31 ... Upper support holes, 32,
33 ... Mounting hole, 40 ... Shaft, 41 ... Outer hole, 42 ... Shaft, 43 ... Outer hole, 50 ... Seat front elevation motor, 51 ... Seat rear elevation motor, 52, 53 ... Gear case, 54, 55 …
Screw shaft, 56, 57 ... Nut member, 58, 59 ... Nut holder, 60, 61 ... Link member, 65, 66, 67 ... Pin, 68 ... Link member, 69 ... Pin, 70 ... Seat support member, 71 ... Link Member, 72 ... Sheet support member, 75, 76, 77 ... Pin, 78 ... Link member, 80 ... Swing link member, 81 ... Support shaft, 82, 83, 84 ...
Pins, 85 ... Seat support member, 86 ... Link member, 87 ... Swing link member, 88 ... Support shaft, 89 ... Seat support member, 100 ... Base bracket, 101 ... Upper support hole.

Claims (3)

[Claims] 1. A vehicle seat position adjusting device in which a seat moves up and down via a link due to rotation of a shaft member that is rotatably installed on a bearing unit that is integral with a pair of left and right sliding members, and a predetermined shaft member. An outer peripheral groove is formed at a position in the circumferential direction, and the bearing portion is formed by combining at least two divided portions, and at least one divided portion of which is fitted into the outer peripheral groove of the shaft member and is rotatably supported. A bearing structure for a vehicle seat position adjusting device, comprising: 2. One of the left and right bearing portions is a support hole that is not divided, and one end of the shaft member is rotatably fitted therein, and the outer peripheral groove is formed at the other end of the shaft member, and the outer peripheral groove is formed on the other side. 2. The vehicle seat position adjustment according to claim 1, wherein the divided lower support hole of the bearing portion is fitted and supported, and the upper support hole is fitted from above to rotatably support the shaft member. Bearing structure of the device. 3. A housing plate integrally connects between the left and right sliding members and base brackets that are integrally attached to each of the left and right sliding members, and one undivided support hole of the left and right bearing portions is formed in the housing plate. 3. The bearing structure for a vehicle seat position adjusting device according to claim 2, wherein among the support holes, a lower support hole is formed by the housing plate and an upper support hole is formed by the base bracket.