CN110920478B - Angle adjuster clearance eliminating mechanism - Google Patents
Angle adjuster clearance eliminating mechanism Download PDFInfo
- Publication number
- CN110920478B CN110920478B CN201911335797.XA CN201911335797A CN110920478B CN 110920478 B CN110920478 B CN 110920478B CN 201911335797 A CN201911335797 A CN 201911335797A CN 110920478 B CN110920478 B CN 110920478B
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- China
- Prior art keywords
- cam
- spring
- cam ring
- elimination mechanism
- voussoir
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- 230000007246 mechanism Effects 0.000 title claims abstract description 53
- 230000008030 elimination Effects 0.000 claims abstract description 16
- 238000003379 elimination reaction Methods 0.000 claims abstract description 16
- 238000004663 powder metallurgy Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
- B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The invention relates to a clearance elimination mechanism of an angle adjuster, which is arranged in the angle adjuster and comprises a cam and two wedge block mechanisms positioned on the upper side surface and the lower side surface of the cam, wherein each wedge block mechanism comprises a spring and two sector blocks connected with the spring. The invention aims at the eccentric structures of the two groups of gears and the toothed plate, adopts a single cam and two groups of wedge spring structures respectively positioned on the upper side surface and the lower side surface of the cam, and respectively eliminates the meshing gaps of the two groups of eccentric structures, thereby solving the comfort problem caused by the shaking and abnormal sound of the backrest caused by the gaps. Meanwhile, the clearance elimination mechanism of the angle adjuster can also be used for driving the angle adjuster to rotate.
Description
Technical Field
The invention relates to the field of automobile seats, in particular to an angle adjuster clearance eliminating mechanism for reducing gear clearance of a toothed plate.
Background
The angle adjuster is a device which is arranged on an automobile seat and realizes the adjustment of the angle of a seat back. The device generally comprises a chair back connecting plate, a chair seat connecting plate, a core piece, a hand wheel or an adjusting handle, a return spring and the like. With the high-speed development of new energy automobiles, the demand of automobile seat motorized automation is increasing. Most of the existing electric angle adjusters of seats adopt eccentric structures, and due to the existence of eccentricity, the problem of shaking can be generated in the process of movement, even the backrest moves in a wave mode, the requirements of rapid and stable adjustment can not be met obviously, and the customer experience is affected. In addition, since the eccentric adjustment is prone to problems such as blocking points being stuck and noise, the angle adjuster of the eccentric adjustment needs to check blocking points, but cannot avoid the problems at all times even if the blocking points are checked manually.
In order to solve the above problems, concentric continuous adjustment of the recliner is an ideal option. The angle adjuster comprises two toothed plates which are meshed with the same gear between the two toothed plates together, namely, the angle adjuster is adjusted by adopting double-gear toothed plates. Each set of gear rack assemblies constitutes an eccentric engagement. However, when this arrangement is at rest, there will be a gap in the tooth engagement between the gear 1 'and the toothed plate 2', as shown in figure 1. If not eliminated, when a passenger leans against the backrest, the angle of the backrest is slightly deflected, and when the angle of the slight deflection is amplified to the backrest, the backrest is quite obviously swayed, so that serious comfort problems are caused. And when no load exists, abnormal sound is easy to cause, and the use experience of a user is seriously affected.
In the prior art, in order to eliminate the gap between the toothed plate and the gear, a single-layer wedge structure or a disc structure is generally adopted. However, because the concentric adjustment angle adjuster has the meshing between the two-stage toothed plate and the gear, the single-layer wedge block structure is difficult to perfectly eliminate the meshing gap of the two-stage gear, and therefore the requirement of the concentric adjustment angle adjuster on the clearance elimination cannot be met.
Disclosure of Invention
In order to solve the problem that gaps exist between toothed plates and gears of concentric adjustment angle adjusters in the prior art, the invention provides an angle adjuster gap eliminating mechanism.
The invention provides a clearance elimination mechanism of an angle adjuster, which comprises a cam and two wedge block mechanisms positioned on the upper side surface and the lower side surface of the cam, wherein each wedge block mechanism comprises a spring and two sector blocks connected with the spring.
The two segments of each wedge mechanism each have a first end and a second end and each have an inner working surface and an outer working surface in the radial direction, the two working surfaces being of an eccentric design.
The cam includes a cam ring having upper and lower bearing surfaces and a cam shaft positioned intermediate the cam ring.
The cam ring is provided with two spaced cam stops which project beyond the cam ring plane.
The cam stop blocks are of symmetrical structures, each cam stop block is provided with a stop surface, and the included angle between the stop surfaces of the stop blocks is 120-135 degrees.
The first ends of the two sector blocks of each wedge block mechanism are provided with grooves, the springs are abutted in the grooves of the two sector blocks, and the second ends are stopped by the stop surfaces of the cam stop blocks.
The grooves adopt U-shaped grooves or horizontal cylindrical holes, and the springs adopt cylindrical spiral springs.
The first ends of the two sector blocks of each wedge block mechanism are provided with vertical holes, and the springs are connected with the vertical holes in a matched mode by adopting special-shaped springs.
The special-shaped spring is an omega-shaped spring.
The cam ring is provided with an oil transmission hole, and the center of the cam shaft is provided with a driving rod interface.
The cam ring and the cam shaft adopt powder metallurgy integrated injection molding parts.
The cam ring is in clamping fit or spline fit with the cam shaft.
The cam ring adopts a powder metallurgy part, and the cam shaft adopts a high polymer plastic part.
The invention provides a clearance eliminating mechanism of an angle adjuster, which aims at two groups of gear-toothed plate eccentric structures, adopts a single cam and two groups of wedge spring structures respectively positioned on the upper side surface and the lower side surface of the cam, and respectively eliminates the meshing clearance of the two groups of eccentric structures, thereby solving the comfort problem caused by back rocking and abnormal sound caused by the clearance. Meanwhile, the clearance elimination mechanism of the angle adjuster can also be used for driving the angle adjuster to rotate.
Drawings
Fig. 1 is a schematic view of the clearance between the tooth plate and the gear in the recliner.
Fig. 2 (a) is an exploded view of the recliner lash take-up mechanism according to the present invention, and fig. 2 (b) is an assembled view of the recliner lash take-up mechanism according to the present invention.
Fig. 3 is a schematic view of a split cam configuration according to the present invention.
Fig. 4 (a) is a schematic view of the angular range of the stop surface according to the present invention, and fig. 4 (b) is a schematic view of the gap between the stop and the wedge in the stationary state according to the present invention.
Fig. 5 and 6 are schematic views of two wedge mechanisms according to the present invention.
Fig. 7 is a schematic illustration of the eccentric design of the inboard and outboard working surfaces of a segment according to the present invention.
Fig. 8 is a schematic diagram of the operation of the recliner lash take-up mechanism in the adjusted condition in accordance with the present invention.
Fig. 9 is a schematic diagram of the operation of the recliner lash take-up mechanism in a stationary condition in accordance with the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples which are to be understood as illustrative only and not limiting.
The invention provides a clearance elimination mechanism of a seat angle adjuster, which is arranged in the center of a seat angle adjuster gear, as shown in fig. 2 (a) and 2 (b), and comprises a cam 4 and two wedge block mechanisms 5 respectively arranged on two side surfaces of the cam, so that the two wedge block mechanisms 5 are kept relatively independent and are not affected by each other.
The cam 4 comprises a cam ring 41 with upper and lower bearing surfaces and a cam shaft 42 positioned in the middle of the cam ring 41, wherein the cam ring 41 is provided with two spaced cam stops 44a and 44b, the two cam stops 44a and 44b protrude out of the plane of the cam ring 41, the cam stop 44a is of a symmetrical structure, the cam stop 44a is provided with a stop surface 47a, and the cam stop 44b is provided with a stop surface 47b. According to the present invention, an oil feed hole 46 is also provided in the cam ring 41 to provide a passage for the two wedge mechanisms 5 to exchange grease with each other, thereby balancing the grease-impregnated condition around the two wedge mechanisms 5. The center of the cam shaft 42 is provided with a driving rod interface 45 for connecting a motor driving shaft or a synchronizing rod as an interface for power input. In this embodiment, the upper and lower support surfaces of the cam ring 41 are flat and unbroken to ensure smooth installation of the two wedge mechanisms 5.
Referring again to fig. 2 (a) and 2 (b), in accordance with the preferred embodiment of the present invention, each wedge mechanism 5 includes a spring 52 and two identically shaped segments 51a and 51b connected to the spring 52. The two segments which cooperate with the spring 52 each have a first end 58 and a second end 59, the first end 58 being provided with a recess 53, the spring 52 being in abutment in the recess 53 of the two segments, the second end 59 being stopped by the stop surfaces 47a and 47b of the cam stop.
The cam 4 comprises a cam ring 41 and a cam shaft 42, which may be of unitary construction, i.e. integrally injection moulded from powder metallurgy. As shown in fig. 3, a split structure is also possible, i.e., the cam ring 41 and the cam shaft 42 are machined separately and then snap-fit or spline-fit with each other. The integral structure has higher strength due to integral molding, but has larger mass, and is unfavorable for light weight. The split structure can adopt a high polymer plastic part for the cam shaft 42, and the cam ring 41 is manufactured by adopting a powder metallurgy part, so that the mass can be reduced, the disassembly is convenient, but the bearing capacity is weaker, and the split structure is not suitable for a high-strength core part. In actual use, different structures can be selected according to specific stress conditions.
According to another preferred embodiment of the present invention, as shown in fig. 4 (a), the angle between the two stop surfaces 47a and 47b of the two stops on the cam ring 41 is preferably 120 ° to 135 °. Referring to the schematic diagram of the setting of the angle range shown in fig. 4 (b), the angle between the two stop surfaces controls the gap 48 from the end surface of the segment 51a to the stop surface 47a and the gap 49 from the end surface of the segment 51b to the stop surface 47b, and the smaller the angle is, the larger the sum of the gap 48 and the gap 49 is; conversely, the smaller the sum of the two gaps. For the angle adjuster, the excessive clearance and the increase of the adjustment idle stroke range have adverse effects on the user adjustment experience; on the other hand, too small clearance results in loss of function of the gaps between the teeth of the wedge 5 due to wear and tear after the user uses the seat for a while, which results in a problem of riding comfort such as rocking of the backrest. Therefore, the inventor designs the angle to be 120-135 degrees after calculation and a large number of experiments, which not only can reduce the adjustment idle stroke to the acceptable range of passengers, but also can avoid the problem of loss of the clearance elimination function caused by durable wear.
Referring again to fig. 2 (a) and 2 (b), the grooves 53 formed in the segments 51a and 51b provide a stop surface for the spring 52, which is relatively stable and prevents interference with other unrelated components. The groove 53 may be a U-shaped groove as shown in fig. 5, or may have a horizontal cylindrical hole (not shown) formed at the end of the segments 51a and 51b, and the spring 52 is a standard cylindrical coil spring, and two ends of the spring are respectively clamped and installed in the two U-shaped grooves or pushed into the cylindrical holes. In addition, as shown in fig. 6, vertical holes 530 may be formed at the first ends 58 of the segments 51a and 51b, and a shaped spring, such as an omega-shaped spring 520, may be used to be engaged therewith, in which case both ends of the spring 520 are inserted into the two vertical holes 530, respectively.
As shown in fig. 7, the segment 51a has an inner working surface 54a and an outer working surface 55a in the radial direction, and the segment 51b has an inner working surface 54b and an outer working surface 55b in the radial direction, the inner and outer working surfaces being designed eccentrically with respect to the center axis. That is, the center 56 of the inner working surface is not at the same point as the center 57 of the outer working surface.
The working principle of the mechanism for eliminating the clearance of the angle adjuster of the present invention will be described below by taking an example of a meshing assembly of the side toothed plate 1 and the gear 3.
When the recliner lash take-up mechanism of the present invention is in the adjusted condition, as shown in fig. 8. The cam 4 rotates under the drive of the motor, the cam stopper 44a contacts with one end surface of the sector 51a of the wedge mechanism 5, and the wedge mechanism 5 starts to rotate under the action of the cam 4 and compresses the spring 52. When the spring force is sufficient to overcome the friction force exerted by the other segment, segments 51a and 51b will be rotated synchronously in the same direction by cam 4. As described above, since the inner and outer working surfaces of the segments 51a and 51b are of an eccentric design, the seat recliner gear 3 moves eccentrically with respect to the toothed plate 1 by the wedge mechanism 5 and meshes with the toothed plate 1. When the toothed plate of the other set of toothed plate gear engagement assembly on the opposite side is fixed, the toothed plate 1 rotates under the drive of the gear 3, and thus the seat back rotates.
When the recliner lash take-up mechanism of the present invention is in a stationary condition, as shown in figure 9. The cam 4 stops rotating, the sector blocks 51a and 51b are spread under the action of the spring forces F3 and F4, and apply forces F1 and F2 opposite to the directions of the gear 3 and the toothed plate 1, respectively, so as to push the gear 3 to be tightly meshed with the toothed plate 1, thereby achieving the purpose of eliminating the gap.
The other set of wedge mechanisms on the other side of cam ring 41 operates similarly. Namely, the two groups of wedge block mechanisms in the system respectively and independently eliminate the gaps between the gear tooth plates contacted with the wedge block mechanisms, so that the comfort problems such as shaking and the like caused by the gaps of the angle adjusters can be avoided.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various modifications can be made to the above-described embodiment of the present invention. All simple, equivalent changes and modifications made in accordance with the claims and the specification of this application fall within the scope of the patent claims. The present invention is not described in detail in the conventional art.
Claims (9)
1. The utility model provides a clearance elimination mechanism of angle modulation ware, its characterized in that includes a cam and locates two voussoir mechanisms on the cam upper and lower both sides face, every voussoir mechanism includes a spring and two fan-shaped pieces that link to each other with this spring, the cam includes cam ring and the camshaft that is located the middle of this cam ring, and the cam ring has two upper and lower level supporting surfaces for two voussoir mechanisms to install, be equipped with two spaced apart cam dog on the cam ring, this two cam dog are protruding from upper and lower both sides supporting surface, and every cam dog has the face that keeps off, the second end of the two fan-shaped pieces of every voussoir mechanism is stopped by the face that keeps off, every two fan-shaped pieces of voussoir mechanism have first end and second end respectively, and radially have inboard working face and outside working face respectively, and this both sides working face is the eccentric design, the first end of two fan-shaped pieces of every voussoir mechanism opens flutedly, the spring butt is in the recess of two fan-shaped pieces.
2. The lash elimination mechanism of claim 1, wherein the cam stops are symmetrical, and an included angle between the stop faces is 120 ° to 135 °.
3. The gap elimination mechanism of claim 1 wherein said recess is a U-shaped slot or a horizontal cylindrical bore and said spring is a cylindrical coil spring.
4. The gap elimination mechanism of claim 1, wherein the first ends of the two segments of each wedge mechanism have a vertical aperture, and wherein the spring is cooperatively coupled to the vertical aperture using a shaped spring.
5. The lash elimination mechanism of claim 4, wherein the shaped spring is an omega shaped spring.
6. The lash elimination mechanism of claim 1, wherein the cam ring is provided with an oil feed port, and the center of the cam shaft is provided with a drive rod interface.
7. The lash elimination mechanism of claim 1, wherein the cam ring and the cam shaft are molded as a powder metallurgy integral injection.
8. The lash elimination mechanism of claim 1, wherein the cam ring is snap fit or spline fit with the cam shaft.
9. The lash elimination mechanism of claim 8 wherein the cam ring is a powder metallurgy and the cam shaft is a polymeric plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335797.XA CN110920478B (en) | 2019-12-23 | 2019-12-23 | Angle adjuster clearance eliminating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335797.XA CN110920478B (en) | 2019-12-23 | 2019-12-23 | Angle adjuster clearance eliminating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN110920478A CN110920478A (en) | 2020-03-27 |
| CN110920478B true CN110920478B (en) | 2024-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911335797.XA Active CN110920478B (en) | 2019-12-23 | 2019-12-23 | Angle adjuster clearance eliminating mechanism |
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| CN (1) | CN110920478B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111532179B (en) * | 2020-04-30 | 2021-12-03 | 恺博(常熟)座椅机械部件有限公司 | Clearance elimination mechanism, concentric angle adjuster and installation method thereof |
| CN111649122A (en) * | 2020-06-06 | 2020-09-11 | 明阳科技（苏州）股份有限公司 | Clearance-eliminating continuous gear mechanism |
| CN112026601B (en) * | 2020-09-15 | 2023-11-14 | 安道拓(重庆)汽车部件有限公司 | Backrest inclination angle adjusting device |
| CN113619456B (en) * | 2021-09-11 | 2022-09-30 | 陈效 | Zero-tooth-difference type automobile seat continuous angle adjuster capable of realizing coaxial output |
| CN116201429B (en) * | 2023-01-30 | 2024-03-26 | 明阳科技（苏州）股份有限公司 | Gapless hinge mechanism |
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| CN102145663A (en) * | 2011-01-27 | 2011-08-10 | 湖北中航精机科技股份有限公司 | Angle adjusting device for seat, self-locking mechanism thereof and seat with angle adjusting device |
| CN211252300U (en) * | 2019-12-23 | 2020-08-14 | 延锋安道拓(常熟)座椅机械部件有限公司 | Angle modulation ware clearance elimination mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2649050B1 (en) * | 1989-06-30 | 1991-10-18 | Cousin Freres Sa | GAME RETRAPING DEVICE FOR SAID CONTINUOUS ARTICULATIONS WITH EPICYCLOIDAL TRAIN |
| TW505118U (en) * | 2001-09-26 | 2002-10-01 | Hornling Ind Inc | Improved backlash eliminating device |
| KR100512876B1 (en) * | 2003-04-19 | 2005-09-06 | 주식회사다스 | Reclining device of continuously type for seat in vehicle |
| DE102004050152A1 (en) * | 2004-10-15 | 2006-04-20 | Keiper Gmbh & Co.Kg | Gearbox fitting for a vehicle seat |
| CN2776749Y (en) * | 2005-03-29 | 2006-05-03 | 田春明 | Angle regulating device of automobile seat angle regulator |
| CN201685726U (en) * | 2010-03-16 | 2010-12-29 | 宁波双林汽车部件股份有限公司 | Double-boss type angle adjuster pushed by inner spline shaft |
| CN102085818B (en) * | 2011-01-27 | 2012-09-19 | 湖北中航精机科技股份有限公司 | Seat angle adjusting device and seat provided with same |
| JP5809014B2 (en) * | 2011-05-13 | 2015-11-10 | シロキ工業株式会社 | Reduction gear mechanism |
| JP2013212328A (en) * | 2012-04-04 | 2013-10-17 | Shiroki Corp | Reduction gear mechanism |
| KR101999118B1 (en) * | 2018-05-30 | 2019-07-11 | 주식회사 다스 | recliner of seat for car |
| CN208978668U (en) * | 2018-10-26 | 2019-06-14 | 延锋安道拓座椅机械部件有限公司 | Hand-electric integral type angle adjustor |
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2019
- 2019-12-23 CN CN201911335797.XA patent/CN110920478B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145663A (en) * | 2011-01-27 | 2011-08-10 | 湖北中航精机科技股份有限公司 | Angle adjusting device for seat, self-locking mechanism thereof and seat with angle adjusting device |
| CN211252300U (en) * | 2019-12-23 | 2020-08-14 | 延锋安道拓(常熟)座椅机械部件有限公司 | Angle modulation ware clearance elimination mechanism |
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| CN110920478A (en) | 2020-03-27 |
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| CB02 | Change of applicant information |
Address after: 215500 No.69 Yinhai Road, Southeast street, Changshu City, Changzhou City, Jiangsu Province Applicant after: Kaibo (Changshu) seat mechanical parts Co.,Ltd. Address before: 215500 No.69 Yinhai Road, Southeast street, Changshu City, Changzhou City, Jiangsu Province Applicant before: Yanfeng Andoto (Changshu) Seat Machinery Parts Co.,Ltd. |
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| CB02 | Change of applicant information |
Address after: 215500 No.69 Yinhai Road, Southeast street, Changshu City, Suzhou City, Jiangsu Province Applicant after: Kaibo (Changshu) seat mechanical parts Co.,Ltd. Address before: 215500 No.69 Yinhai Road, Southeast street, Changshu City, Changzhou City, Jiangsu Province Applicant before: Kaibo (Changshu) seat mechanical parts Co.,Ltd. |
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