专利摘要:
An adjusting mechanism comprising a screw (12), a support (18) having first and second transverse walls (20a, 20b) perpendicular to the screw, a housing (17) having first and second end faces (24a, 24b) ) disposed opposite the first and second transverse walls and having a nut housing (25) which opens out with first and second opposed apertures (26a, 26b), a first elastomer pad (37a) interposed between the first transverse wall of the support and the first end face of the housing, a second elastomer buffer (27b) interposed between the second transverse wall of the support and the second end face of the housing, a nut (14) screwed onto the screw, a bearing (30) engaged in the second opening of the housing and traversed by the screw. The nut is in rigid abutment against the housing in the direction of the first opening and the bearing is in elastic abutment against the second elastomer pad.
公开号:FR3071784A1
申请号:FR1759116
申请日:2017-09-29
公开日:2019-04-05
发明作者:Jean-Noel REY
申请人:Faurecia Sieges dAutomobile SA;
IPC主号:
专利说明:

Screw adjustment mechanism, slide comprising such an adjustment_and_seat_comportant_such a slide.
FIELD OF THE INVENTION
The present invention relates to screw adjustment mechanisms, slides comprising such mechanisms and seats comprising such slides.
BACKGROUND OF THE INVENTION
More particularly, the invention relates to a screw adjustment mechanism, comprising:
- a screw which extends along a longitudinal axis,
a support having first and second walls substantially perpendicular to the longitudinal transverse axis, a casing mounted on the support between the first and second transverse walls of said support, said casing having second faces facing said first and end arranged respectively in first and second transverse walls of said support and said housing having a nut housing which extends along said longitudinal axis and opens at the first and second end faces of the housing respectively by first and second opposite openings, the screw passing through the first and second openings, a first elastomer pad interposed in compression between the first transverse wall of the support and the first end face of the casing, a second elastomer pad interposed between the second transverse wall of the support and the second face end of the housing,
- a nut screwed onto said screw, the nut being rotatably mounted in the housing nut of the housing, a bearing engaged in the second opening of the housing and crossed by the screw, the nut being in rigid axial abutment against the bearing in direction of the second opening.
The document FR2882974A1 describes an adjustment mechanism of this type, which gives full satisfaction as to its operation. In the adjustment mechanism of document FR2882974A1, the bearing is mounted without play on the screw, passes through the second elastomer pad and is in abutment against the second transverse wall of the support. This mechanism further comprises an additional bearing mounted without play on the screw, passing through the first opening of the casing and the first elastomer pad, the additional bearing being interposed between the nut and the first transverse wall of the support. The nut is mounted without play between the bearings.
OBJECTS AND SUMMARY OF THE INVENTION
The object of the present invention is in particular to further improve adjustment mechanisms of this type, in particular to reduce their complexity and cost.
To this end, according to the invention, an adjustment mechanism of the kind in question is characterized in that the nut is in rigid axial abutment against the casing in the direction of the first opening and the bearing is in elastic axial abutment against the second elastomer pad.
By "rigid stop" here is meant a stop without taking up elastic play, possibly with the interposition of rigid elements such as a washer or the like between the two elements in rigid stop.
By “elastic stop” is meant here a stop allowing an elastic backlash adjustment, in this case thanks to the elasticity of the elastomer pad.
Thanks to these provisions, all of the backlash of the mechanism in the longitudinal direction is carried out by the first and second elastomer pads, in a simple and inexpensive manner. This avoids in particular treating on the one hand the backlash between the casing and the support and on the other hand the backlash of the nut inside the casing, by two independent backlash systems.
In preferred embodiments of the slide according to the invention, one can optionally have recourse to one and / or the other of the following arrangements:
- The nut and the bearing are shaped to be fitted axially in the housing by the second opening of said housing;
- The casing is in one piece (this simplifies the structure of the casing and its mounting, and the cost of the mechanism is further reduced, compared with the mechanism of document FR2882974A1);
- The nut has first and second cylindrical ends, the first cylindrical end journalling in a bore of the casing and the second cylindrical end being fitted into the bearing;
- The bearing comprises a flange interposed between the second end face of the casing and the second elastomer pad, an axial clearance being provided between said flange and the second end face of the casing;
- Said collar has a noncircular edge which cooperates with a flange belonging to the second end face of the housing, to immobilize the bearing in rotation relative to the housing;
a rigid washer is interposed axially between the nut and the bearing;
the bearing is made of rigid material, for example metallic.
Furthermore, the subject of the invention is also a slide comprising an adjustment mechanism as defined above, a fixed profile and a movable profile secured to the support of the adjustment mechanism and mounted to slide relative to the fixed profile parallel to said longitudinal axis, the screw of the adjustment mechanism being secured to the fixed profile.
Finally, the invention also relates to a vehicle seat comprising at least one slide as defined above and a seat secured to the first movable profiled slide element of said slide. BRIEF DESCRIPTION OF THE DRAWINGS
Other characteristics and advantages of the invention will appear during the following description of one of its embodiments, given by way of nonlimiting example, with reference to the accompanying drawings.
In the drawings:
FIGS. 1 and 2 are schematic views, respectively from the side and from the front, of a seat which can include slides according to the invention,
FIG. 3 is a perspective view of one of the slides of the seat in FIGS. 1 and 2,
- Figure 4 is a view similar to Figure 3, without the movable profile of the slide,
FIG. 5 is a perspective view showing the adjustment mechanism with the slide of FIGS. 3 and 4,
FIG. 6 is an exploded view of the adjustment mechanism of FIG. 5,
FIG. 7 is a view in vertical axial section of the adjustment mechanism of FIGS. 5 and 6.
MORE DETAILED DESCRIPTION
In the different figures, the same references designate identical or similar elements.
Figure 1 shows a motor vehicle seat 1 which includes a backrest 2 carried by a seat 3 itself slidingly mounted on the floor 4 of the vehicle, in a substantially horizontal longitudinal direction X.
The seat 3 is connected to the floor 4 by two parallel slides 5, only one of which is visible in FIG. 1.
As shown in FIG. 2, each of the slides 5 comprises first and second slide elements 6, 7, formed respectively by a fixed metal profile 6 linked to the floor 4 and a movable metal profile 7 linked to the seat 3, which slide one on the other in the longitudinal direction X.
The slides 5 of the seats are here electric motorized slides, controlled for example by means of a button 8 (FIG. 1) arranged for example on the side of which controls an electric motor 9 example by hoses 10) adjustment 11 of the two mechanisms of Figures 3 and 4, the each slide is a seat of the driving seat (by respectively slides 5 (Figure 2).
As shown on the adjustment mechanism 11 of the screw adjustment mechanism, comprising a screw 12 integral with the fixed section 7 and extending along a longitudinal axis X0 parallel to the longitudinal direction X mentioned above.
The adjustment mechanism 11 also comprises a transmission device 13 which can be placed inside the movable profile 6. The transmission device 13 comprises a nut 14 screwed onto the screw 12 and mounted to rotate around the longitudinal axis X0 of the screw 12, as clearly visible in FIGS. 5 to 7.
The nut 14 can be controlled in rotation for example by an endless screw 15 which engages with an external toothing 16 of the nut 14. The endless screw 15 can be rotatable around a transverse axis Y0 parallel to a transverse direction horizontal Y perpendicular to the longitudinal direction X.
The endless screw 15 can be rotated by the motor 9 via the flexible hoses 10 or the like, which pass through the side wall of the movable profile 6.
The worm 15 and the nut 14 can be rotatably mounted in a rigid casing 17 (for example metallic) carried by a rigid support 18.
The support 18 may have a form of cradle having a horizontal base 19 on which the housing 17 rests. The horizontal base extends in the longitudinal direction X between two ends extended respectively by first and second transverse walls 20a, 20b. The first and second transverse walls 20a, 20b extend in the transverse direction Y and in a vertical direction Z. The first and second transverse walls 20a, 20b may each have a recess through which the screw 12 passes.
The first and second transverse walls 20a, 20b can be extended horizontally by two opposite fixing lugs 22 which can be fixed under the upper wall of the movable profile (for example by screws 22b screwed into holes 22a in the fixing lugs), as shown in Figures 3 to 5.
The casing 17 can be in one piece, in particular metallic.
As shown in Figures 5 17 may include a screw housing 23 which the worm 15 is rotatably mounted.
The casing 17 may have first and end 24a, 24b arranged facing said first and second transverse walls 20a, 20b of the support 17.
The housing 17 includes a nut housing 25 which extends along the longitudinal axis X0 and opens at the first and second end faces 24a, 24b of the housing respectively by first and second opposite openings 26a, 26b, the screw 12 passing through the first and second openings 26a, 26b.
The transmission device 13 can also comprise a first elastomer pad 27a interposed in compression between the first transverse wall 20a of the support and the first end face 24a of the casing (in direct or indirect contact with the first transverse wall 20a of the support and the first end face 24a of the casing).
It can be at 7, the endless casing in second faces respectively in
The transmission device 13 may also include a second elastomer pad 27b interposed between the second transverse wall 20b of the support and the second end face 24b of the casing (in contact or not with the second end face 24b of the casing) . Optionally, the second elastomer pad 27b can be compressed between the second transverse wall 20b of the support and the second end face 24b of the casing (in direct or indirect contact with the second transverse wall 20b of the support and the second face of end 24b of the casing).
Each elastomer pad 27a, 27b can be in the form of an elastomer plate perpendicular to the axis X0, the case being pierced with an opening 28 crossed by the screw 12. Each elastomer pad 27a, 27b may optionally include a return 29 partially including the casing 17, in particular upwards.
The transmission device 13 can also include a bearing 30, engaged in the second opening 24b of the casing and crossed by the screw 12. The bearing 30 can be made of rigid material, in particular metal.
The bearing 30 can be in the form of a ring. It may include a cylindrical body 31 which enters the nut housing 25 through the second opening 26b, and an enlarged flange 32 which is arranged opposite the second end face 24b of the casing, with a certain clearance e for example on the order of 1 to a few mm. The collar 32 is interposed axially between the second face 26b of the casing and the second elastomer pad 27b. Said flange 32 may have a noncircular edge (for example rectilinear) which cooperates with a corresponding flange 24c belonging to the second end face 26b of the casing, in order to immobilize the bearing 30 relative to the casing 17.
The nut 14 is in rigid axial abutment against the free end of the cylindrical body 31 of the bearing (if necessary with the interposition of a rigid washer 34) and in rigid axial abutment against the casing in the direction of the first opening 26a, while that the collar 32 of the bearing is in elastic axial abutment against the second elastomer pad 27b, which is thus compressed between the bearing 30 and the second transverse wall 20b of the support 20.
Other washers or bearing rings can be provided in particular on either side of the nut 14 to reduce friction and wear.
The nut 14 may have first and second cylindrical ends 14a, 14b. The first cylindrical end 14a can journal in a bore 35 of the casing. The second cylindrical end 14b can be fitted into the cylindrical body 31 of the bearing 30.
Said rigid axial stop of the nut 14 the casing 17 in the direction of the first opening 26a, can be obtained for example by axial contact between the first cylindrical end 14a and a corresponding part of the casing, and / or by axial contact between a shoulder 14c delimiting said first cylindrical end 14a, and a corresponding part of the casing.
The nut 14 and the bearing 30 can be shaped to be fitted axially in the casing 17 by the second opening 26b of said casing.
The transmission device 13 is particularly resistant due to the one-piece structure of the casing 17 and the fact that the elastomer pads 27a, 27b ensure both the take-up of play between the casing 17 and the support 18 and the take-up of play between nut 14 and housing 17.
权利要求:
Claims (10)
[1" id="c-fr-0001]
1. Adjustment mechanism (11) with screw, comprising
(20a, 20b) of said nut (25) who and leads at end (24a
- a screw (12) which extends along a longitudinal axis (X0), a support (18) having first and second transverse walls (20a, 20b) substantially perpendicular to the longitudinal axis (X0), a casing (17 ) mounted on the support (18) between the first and second transverse walls (20a, 20b) of said support, said casing having first and second end faces (24a, 24b) disposed respectively opposite said first and second transverse support walls and said housing having a housing extends along said longitudinal axis (X0) level of the first and second faces (24a, 24b) of the housing respectively by opposite first and second openings (26a, 26b), the screw (12) passing through the first and second openings (26a, 26b),
- a first elastomer pad (27a) interposed in compression between the first transverse wall (20a) of the support and the first end face (24a) of the casing, a second elastomer pad (27b) interposed between the second wall transverse (20b) of the support and the second end face (24b) of the housing, a nut (14) screwed onto said screw (12), the nut (14) being rotatably mounted in the nut housing (25) of the housing, a bearing (30) engaged in the second opening (26b) of the housing and traversed by the screw (12), the nut (14) being in rigid axial abutment against the bearing (30) in the direction of the second opening (26b), characterized in that the nut (14) is in rigid axial abutment against the casing (17) in the direction of the first opening (26a) and the bearing (30) is in elastic axial abutment against the second buffer d elastomer (27b).
[2" id="c-fr-0002]
2. An adjustment mechanism according to claim 1, in which the nut (14) and the bearing (30) are shaped to be fitted axially in the casing (17) by the second opening (26b) of said casing.
[3" id="c-fr-0003]
3. An adjustment mechanism according to claim 2, in which the casing (17) is in one piece.
[4" id="c-fr-0004]
4. Adjustment mechanism according to any one of the preceding claims, in which the nut (14) has first and second cylindrical ends (14a, 14b), the first cylindrical end (14a) journalling in a bore (35) of the casing and the second cylindrical end (being fitted into the bearing.
[5" id="c-fr-0005]
5. Adjustment mechanism according to any one of the preceding claims, in which the bearing (30) comprises a flange (32) interposed between the second end face (24b) of the casing and the second elastomer pad (27b) , an axial clearance (e) being formed between said flange (32) and the second end face (24b) of the casing.
[6" id="c-fr-0006]
6. Adjustment mechanism according to claim 5, wherein said flange (32) has an edge (33) non-circular which cooperates with a flange (24c) belonging to the second end face (24b) of the housing, to immobilize in rotation the bearing (30) relative to the housing (17).
[7" id="c-fr-0007]
7. Adjustment mechanism according to any one of the preceding claims, in which a rigid washer (34) is interposed axially between the nut (14) and the bearing (30).
[8" id="c-fr-0008]
8. Adjustment mechanism according to any one of the preceding claims, in which the bearing (30) is made of rigid material.
[9" id="c-fr-0009]
9. Slide (5) comprising an adjustment mechanism (11) according to any one of the preceding claims, a fixed profile (7) and a movable profile (6) integral with the support (18) of the adjustment mechanism (11) and slidably mounted relative to the fixed profile (7) parallel to said longitudinal axis (XO), the screw (12) of the adjustment mechanism being secured to the fixed profile (7).
[10" id="c-fr-0010]
10.Seat (1) of a vehicle comprising at least one slide (5) according to claim 9 and a seat (3) secured to the movable profile (6) of said slide.
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法律状态:
2019-04-05| PLSC| Search report ready|Effective date: 20190405 |
2019-08-20| PLFP| Fee payment|Year of fee payment: 3 |
2021-06-11| ST| Notification of lapse|Effective date: 20210506 |
优先权:
申请号 | 申请日 | 专利标题
FR1759116A|FR3071784B1|2017-09-29|2017-09-29|SCREW ADJUSTMENT MECHANISM, SLIDE COMPRISING SUCH AN ADJUSTING MECHANISM AND SEAT COMPRISING SUCH A SLIDER.|
FR1759116|2017-09-29|FR1759116A| FR3071784B1|2017-09-29|2017-09-29|SCREW ADJUSTMENT MECHANISM, SLIDE COMPRISING SUCH AN ADJUSTING MECHANISM AND SEAT COMPRISING SUCH A SLIDER.|
EP18188347.1A| EP3461681B1|2017-09-29|2018-08-09|Screw adjustment mechanism, slide comprising such an adjustment mechanism and seat comprising such a slide|
CN201811017913.9A| CN109572496B|2017-09-29|2018-09-03|Screw rod adjustment mechanism, guide rail comprising screw rod adjustment mechanism and seat comprising guide rail|
US16/133,126| US10857912B2|2017-09-29|2018-09-17|Screw-based adjustment mechanism, rail comprising such an adjustment mechanism, and seat comprising such a rail|
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