CA1140448A - Seat reclining mechanism - Google Patents
Seat reclining mechanismInfo
- Publication number
- CA1140448A CA1140448A CA000331355A CA331355A CA1140448A CA 1140448 A CA1140448 A CA 1140448A CA 000331355 A CA000331355 A CA 000331355A CA 331355 A CA331355 A CA 331355A CA 1140448 A CA1140448 A CA 1140448A
- Authority
- CA
- Canada
- Prior art keywords
- gear
- control gear
- gears
- ring
- seat reclining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
ABSTRACT.
SEAT RECLINING MECHANISMS.
Mechanism for reclining the back seat rest relative to the seat proper include a pair of internally toothed ring gears one gear having a different number of teeth from the other ring gear. The ring gears are mounted for relative rotation about a common axis and are rotated by a shaft on the axis mounting a control gear meshing with a planetary gear in mesh with both ring gears. The planetary gear is held in mesh with the ring gears and the control gear by a support member having a concave surface.
SEAT RECLINING MECHANISMS.
Mechanism for reclining the back seat rest relative to the seat proper include a pair of internally toothed ring gears one gear having a different number of teeth from the other ring gear. The ring gears are mounted for relative rotation about a common axis and are rotated by a shaft on the axis mounting a control gear meshing with a planetary gear in mesh with both ring gears. The planetary gear is held in mesh with the ring gears and the control gear by a support member having a concave surface.
Description
4~3 This invention relates to a seat reclining mechanism particularly for use in motor cars.
A seat reclining mechanism is known in which two hinge members are pivotally interconnected by a shaft which mounts 5 a sun gear. Planetary gears are engaged with the sun gear and also engage with t~o ring gears surrounding the planet-ary gears. These ring gears are mounted on the two hinge members respectively, the ring gears having a different number of teeth. A knob is mounted on the shaftito rotate 10 the latter, the gear arrangement providing reduction gear-ing for angularly moving the hinge members.
In the prior art it is also known to provide an arrangement for rotatakly mounting the planetary gears on pivot studs on a carrier plate, so that the planetary gears 15 are in mesh with the control gear in turn in mesh with the ring gears.
The present invention is concerned with an improvement in the known construction. Accordingly, the present invention provides a seat reclining mechanism comprising first and second hinged members, an internally toothed ring gear on each of the hinged members, one ring gear having more teeth than the other ring gear, a control gear located within the two ring gears at least one planetary gear in mesh with both ring gears and the control gear, a support member for locating the planetary gears in mesh with the control gear, and with the ring gears, said support member having a concave surface receiving the planetary gears and being mounted concentric with the
A seat reclining mechanism is known in which two hinge members are pivotally interconnected by a shaft which mounts 5 a sun gear. Planetary gears are engaged with the sun gear and also engage with t~o ring gears surrounding the planet-ary gears. These ring gears are mounted on the two hinge members respectively, the ring gears having a different number of teeth. A knob is mounted on the shaftito rotate 10 the latter, the gear arrangement providing reduction gear-ing for angularly moving the hinge members.
In the prior art it is also known to provide an arrangement for rotatakly mounting the planetary gears on pivot studs on a carrier plate, so that the planetary gears 15 are in mesh with the control gear in turn in mesh with the ring gears.
The present invention is concerned with an improvement in the known construction. Accordingly, the present invention provides a seat reclining mechanism comprising first and second hinged members, an internally toothed ring gear on each of the hinged members, one ring gear having more teeth than the other ring gear, a control gear located within the two ring gears at least one planetary gear in mesh with both ring gears and the control gear, a support member for locating the planetary gears in mesh with the control gear, and with the ring gears, said support member having a concave surface receiving the planetary gears and being mounted concentric with the
- 2 -control gear and means for rotating the control gear to effect relative angular adjustment of the two hinged members.
In a particular construction the planetary gears will be of a given width orthickness for meshing with the two ring gears. The control gear will be of approximately one third of the thickness of the planetary gears and two support members of substantially `the same thickness and also of approximately one third of the thickness of the planetary gears, are provided either side of the control gear so that the control gear is in mesh with the planetary gears and the planetary gears which are freely located within the ring gears are in fact held in position by a concave surface on the support melmbers. Desirably, four concave surfaces are provided so that four planetary gears are in mesh with the control gear and in turn in mesh with the internally toothed ring gears.
In order that the present invention may be more readily understood, reference is now made to the drawings which accompanied the provisional specification in which;
20Figure l is a sectional view of a seat reclining mechanism according to the presen~ invention and Figure 2 is an elevation of a part of the mechanism on the line A--A of Figure l.
The mechanism shown comprises a first hinge 25 plate ll for attachment to a back-rest (not shown) and a second hinge plate 12 for attachment to a seat (not shown), the plates being hinged together by a pin 13 having a head 14.
The first hinge plate ll is fine-blancked~to 4~3 define a circular shoulder 16 opposite to a circular recess 17 and to define a first ring gear 18 having internal teeth 19. The second hinge plate 12 is also fine-blancked to define a circular recess 21 and a second ring gear 22 5 having teeth 23. The shoulder 16 is a close fit in the recess 21. The first ~ing gear 18 has 25 teeth and the second ring gear 22 has 21 t~eth. A support plate 25 is interposed between the head 14 and the second hinge plate 12.
The pin 13 has flatted portions 28, 29 and mounts 10 a control gear 30 having a complemantary aperture, so that rotation of the pin produces rotation of the control gear 30, The control gear is sandwiched between two support members 31a, 31b, to b,e fully described hereafter, the pin being rotatable within the members. The control gear has seven teeth 32.
Between the ring gears 18, 22 and the control gear 30, Eour planetary gears 35 to 38 are meshed, these planetary gears each having eight teeth and each engaging simultaneously with both ring gears.
A further retaining plate 40 is received by the pin 13 and engages in the recess 17 to hold the gears in position. A resilient washer 41 is located between a spacer 42 and the further retaining plate 40. A location washer 43 bears on the ~pacer and a nut 44 bears on the location washer through other washers 45, 46. A hand wheel 47 is mounted on the location washer 43 and held in position )448 by a retaining washer 48 and a further nut 49 engaged on a pin 13.
The resilience of the washer 41 permits rotation of the pin 13 by turning of the handwheel 47. The control wheel 30 is thereby rotated and motion is transmitted through the planetary gears 35 to 38 to the ring gears 18, 22, so that a small angular movement of the hinge plates 11, 12 is effected per revolution of the handwheel 470 Each support member 31a, 31b is cruciform and effectively is a disc-shaped member having a central circular aperture 50, indicated by dash-lines in Flgure 2 and having cut-outs. The aperture 50 is complementary to the pin 13, but due to its circular shape, each support member is locatèd by its aperture, but the pin can rotate within the member.
The cut-outs are part-c~xcular ancl are equi-angularly spaced, so as to define arms 51 and 54 ancl concave surfaces 55 to 58.
As shown in Figure 2, each planetary gear 35 to 38 is complementary to and is snugly received in contact with a respective one of the concave surfaces 55 to 5~ of each of the support members 31a, 31b.
In use, the concave surfaces act as ramps, so that the planetary gears tend to climb these surfaces, this tendency serving to urge the planetary gears into mesh with the ring gears 18, 22 so that th~re is no slipping, even with considerable wear. The floating nature of the support members also compensates for wear on the gears and for man-ufacturing tolerances.
In a particular construction the planetary gears will be of a given width orthickness for meshing with the two ring gears. The control gear will be of approximately one third of the thickness of the planetary gears and two support members of substantially `the same thickness and also of approximately one third of the thickness of the planetary gears, are provided either side of the control gear so that the control gear is in mesh with the planetary gears and the planetary gears which are freely located within the ring gears are in fact held in position by a concave surface on the support melmbers. Desirably, four concave surfaces are provided so that four planetary gears are in mesh with the control gear and in turn in mesh with the internally toothed ring gears.
In order that the present invention may be more readily understood, reference is now made to the drawings which accompanied the provisional specification in which;
20Figure l is a sectional view of a seat reclining mechanism according to the presen~ invention and Figure 2 is an elevation of a part of the mechanism on the line A--A of Figure l.
The mechanism shown comprises a first hinge 25 plate ll for attachment to a back-rest (not shown) and a second hinge plate 12 for attachment to a seat (not shown), the plates being hinged together by a pin 13 having a head 14.
The first hinge plate ll is fine-blancked~to 4~3 define a circular shoulder 16 opposite to a circular recess 17 and to define a first ring gear 18 having internal teeth 19. The second hinge plate 12 is also fine-blancked to define a circular recess 21 and a second ring gear 22 5 having teeth 23. The shoulder 16 is a close fit in the recess 21. The first ~ing gear 18 has 25 teeth and the second ring gear 22 has 21 t~eth. A support plate 25 is interposed between the head 14 and the second hinge plate 12.
The pin 13 has flatted portions 28, 29 and mounts 10 a control gear 30 having a complemantary aperture, so that rotation of the pin produces rotation of the control gear 30, The control gear is sandwiched between two support members 31a, 31b, to b,e fully described hereafter, the pin being rotatable within the members. The control gear has seven teeth 32.
Between the ring gears 18, 22 and the control gear 30, Eour planetary gears 35 to 38 are meshed, these planetary gears each having eight teeth and each engaging simultaneously with both ring gears.
A further retaining plate 40 is received by the pin 13 and engages in the recess 17 to hold the gears in position. A resilient washer 41 is located between a spacer 42 and the further retaining plate 40. A location washer 43 bears on the ~pacer and a nut 44 bears on the location washer through other washers 45, 46. A hand wheel 47 is mounted on the location washer 43 and held in position )448 by a retaining washer 48 and a further nut 49 engaged on a pin 13.
The resilience of the washer 41 permits rotation of the pin 13 by turning of the handwheel 47. The control wheel 30 is thereby rotated and motion is transmitted through the planetary gears 35 to 38 to the ring gears 18, 22, so that a small angular movement of the hinge plates 11, 12 is effected per revolution of the handwheel 470 Each support member 31a, 31b is cruciform and effectively is a disc-shaped member having a central circular aperture 50, indicated by dash-lines in Flgure 2 and having cut-outs. The aperture 50 is complementary to the pin 13, but due to its circular shape, each support member is locatèd by its aperture, but the pin can rotate within the member.
The cut-outs are part-c~xcular ancl are equi-angularly spaced, so as to define arms 51 and 54 ancl concave surfaces 55 to 58.
As shown in Figure 2, each planetary gear 35 to 38 is complementary to and is snugly received in contact with a respective one of the concave surfaces 55 to 5~ of each of the support members 31a, 31b.
In use, the concave surfaces act as ramps, so that the planetary gears tend to climb these surfaces, this tendency serving to urge the planetary gears into mesh with the ring gears 18, 22 so that th~re is no slipping, even with considerable wear. The floating nature of the support members also compensates for wear on the gears and for man-ufacturing tolerances.
Claims (5)
1. A seat reclining mechanism comprising first and second hinged members, an internally toothed ring gear on each of the hinged members, one ring gear having more teeth than the other ring gear, a control gear located within the two ring gears at least one planetary gear in mesh with both ring gears and the control gear, a support member for locating the plane-tary gears in mesh with the control gear, and with the ring gears, said support member having a concave surface receiving the planetary gears and being mounted concentric with the control gear and means for rotating the control gear to effect relative angular adjustment of the two hinged members.
2. A seat reclining mechanism according to claim 1 in which the support member has four equally spaced concave surfaces for receiving the externally toothed gear surface of four separate planetary gears.
3. A seat reclining mechanism according to claim 1 or 2 in which the control gear is sandwiched between two support members.
4. A seat reclining mechanism according to claim 1 or claim 2 in which the support member is substantially of cruciform appearance.
5. A seat reclining mechanism according to claim 1 or claim 2 in which the control gear is sandwiched between two support members and in which the support member is substantially of cruciform appearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000331355A CA1140448A (en) | 1979-07-09 | 1979-07-09 | Seat reclining mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000331355A CA1140448A (en) | 1979-07-09 | 1979-07-09 | Seat reclining mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140448A true CA1140448A (en) | 1983-02-01 |
Family
ID=4114636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000331355A Expired CA1140448A (en) | 1979-07-09 | 1979-07-09 | Seat reclining mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1140448A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248481A (en) * | 1990-08-29 | 1992-04-08 | Ikeda Bussan Co | Seat reclining mechanism |
| US5704870A (en) * | 1995-05-27 | 1998-01-06 | Shephard; Philip Charles | Angular adjustment mechanisms |
-
1979
- 1979-07-09 CA CA000331355A patent/CA1140448A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2248481A (en) * | 1990-08-29 | 1992-04-08 | Ikeda Bussan Co | Seat reclining mechanism |
| US5183447A (en) * | 1990-08-29 | 1993-02-02 | Ikeda Bussan Co., Ltd. | Seat reclining mechanism |
| GB2248481B (en) * | 1990-08-29 | 1994-03-16 | Ikeda Bussan Co | Seat reclining mechanism |
| US5704870A (en) * | 1995-05-27 | 1998-01-06 | Shephard; Philip Charles | Angular adjustment mechanisms |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |