CN110626232A - Drive for adjusting the lifting of a vehicle seat and vehicle seat with such a drive - Google Patents
Drive for adjusting the lifting of a vehicle seat and vehicle seat with such a drive Download PDFInfo
- Publication number
- CN110626232A CN110626232A CN201810649510.XA CN201810649510A CN110626232A CN 110626232 A CN110626232 A CN 110626232A CN 201810649510 A CN201810649510 A CN 201810649510A CN 110626232 A CN110626232 A CN 110626232A
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- Prior art keywords
- gear
- output
- transmission
- planetary gear
- train
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- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000006978 adaptation Effects 0.000 claims 1
- 208000032369 Primary transmission Diseases 0.000 abstract description 5
- 208000032370 Secondary transmission Diseases 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
- B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
- B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
- B60N2/165—Gear wheel driven mechanism
-
- 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
- B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
- B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
- B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
- B60N2/1655—Cycloidal or planetary mechanism
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Seats For Vehicles (AREA)
Abstract
The invention relates to a driver for lifting and adjusting an automobile seat, which comprises a box body, a box cover matched with the box body and a transmission device, wherein the transmission device comprises a primary transmission mechanism and a secondary transmission mechanism, the primary transmission mechanism comprises helical gears and worms which are meshed with each other and are respectively arranged along staggered axes, the secondary transmission mechanism comprises a planetary gear transmission train, and the planetary gear transmission train is an NGWN type planetary gear train. The driver disclosed by the invention has the advantages of large transmission ratio, small volume and stable transmission, and has the characteristics of compact structure and high efficiency. In addition, the invention also relates to a vehicle seat comprising the driver.
Description
Technical Field
The present invention relates to actuators, and more particularly to an actuator for vehicle seat lift adjustment. The invention further relates to a vehicle seat comprising a drive for a vehicle seat lift adjustment.
Background
In order to be able to better adapt to the requirements of different vehicle users, it is often necessary to adjust the height and angle of the vehicle seat, and in particular to provide a drive for automatically adjusting the lifting or lowering height of the seat. In the field of drives, in particular in drive systems for seat lifting adjustment, the transmission of power is usually effected by means of a two-stage or multistage transmission. Generally, in the case of a two-stage transmission, the final stage transmission often employs a planetary gear train.
Various types of planetary gear trains are known in the art. It should be understood that the following three transmission types can be classified according to the configuration of the basic components: 2Z-X, 3Z, Z-X-V (Z is a center wheel, X is a swivel arm, V is an output shaft), wherein the 2Z-X type basic member comprises two center wheels and a swivel arm; the basic member of the 3Z type comprises three central wheels (in the 3Z type, since the arm X is not subjected to the action of external moments, it is not considered as a basic member but merely as a structural element required to support the planetary wheel spindles); the basic components of the Z-X-V type comprise a central wheel, a rotating arm and an output shaft. In particular, type 3Z also includes types 3Z-I, 3Z-II and 3Z-III, which have different gear ratio ranges and transmission efficiencies, respectively.
If the gear meshing mode can be further divided into the following transmission types: NGW type (planetary gear train having an internal gear pair and an external gear pair, and also having one common gear), NW type (planetary gear train having an internal gear pair and an external gear pair), NN type (planetary gear train having two internal gear pairs), WW type (planetary gear train having two external gear pairs), NGWN type (planetary gear train having two internal gear pairs and one external gear pair, and also having one common gear), and N type (planetary gear train having only one internal gear pair). It will be appreciated that the transmission type is of the NGWN type, since the 3Z type (including 3Z-I, 3Z-II and 3Z-III) has two internal gear pairs, one external gear pair and one common gear.
In the prior art, particularly in a driver for adjusting the lifting of an automobile seat (particularly the 'rear lifting' causing the integral lifting of the seat), generally, a worm gear and worm transmission is adopted to realize the speed reduction of a first stage, and then the speed reduction of a second stage is realized through an NGW planetary gear train transmission, so as to reduce the production cost and the manufacturing and processing difficulty as much as possible. However, the planetary transmission structure needs a large space layout, and cannot realize a compact structure, so that the design requirement of light weight of an automobile seat cannot be realized.
Accordingly, there is a need for an actuator for vehicle seat lift adjustment having a novel structure that overcomes one or more of the problems set forth above and/or other deficiencies in the prior art.
Disclosure of Invention
The invention is based on this background and has for its object at least to provide a compact drive for a lift adjustment of a vehicle seat, which makes it easier to arrange and adapt it to a seat frame with limited installation space.
According to one aspect of the invention, a drive for lift adjustment of a vehicle seat is proposed, comprising a housing, a cover adapted to the housing, and a transmission comprising a primary transmission and a secondary transmission, wherein the primary transmission comprises helical gears and worms meshing with each other and arranged along staggered axes, respectively, and the secondary transmission comprises a planetary gear train, wherein the planetary gear train is a planetary gear train of the NGWN type.
Advantageously, the epicyclic gear train is a planetary gear train of the NGWN (3Z-I) type.
Advantageously, the NGWN (3Z-I) planetary gear train comprises a sun gear, double planet gears, a planet carrier, a planet shaft for mounting the double planet gears on the planet carrier, an annulus gear and an output annulus gear, wherein the sun gear, the annulus gear and the output annulus gear serve as the three sun gears in the 3Z-I planetary gear train, the annulus gear is fixed, one of the double planet gears meshes with both the sun gear and the fixed annulus gear, and the other of the double planet gears meshes with the output annulus gear.
Advantageously, the helical gear is non-rotatably coupled with the sun gear such that power from the motor is transmitted through the worm and helical gear and ultimately output through the output annulus gear.
Advantageously, the helical gear, the sun gear, the planet carrier and the output annulus gear are rotatably mounted on the same support shaft, one end of which is received in a bearing hole in the housing and the other end of which is received in a central hole in the output annulus gear.
Advantageously, the output end of the internal output gear is integrally formed with a coaxial output gear, which protrudes through a central opening of the cover to connect with a sector-shaped toothed disc on the seat frame, so that the lifting height adjustment of the vehicle seat is realized.
Advantageously, the NGWN-type planetary gear train is integrally received within the cover and forms, together with the bevel gear, a cover module, the worm being received within the case and forming, together with a motor fixed to the case, a case module, the cover module and the case module being fixed together by fastening means to constitute the drive.
According to a first aspect of the invention, a vehicle seat is proposed, which comprises an actuator according to the invention with the above-mentioned technical features.
Advantageously, the actuator is fixed to a lateral mounting plate of the frame of the car seat by means of mounting bolts passing through mounting holes in the cover.
The driver for lifting and adjusting the automobile seat realizes the first-stage speed reduction through the first-stage staggered shaft helical gear and worm transmission mechanism and the second-stage speed reduction through the NGWN type planetary gear train, particularly the NGWN (3Z-I) type planetary gear train, so that the advantages of large transmission ratio, small volume, good self-locking performance and stable transmission can be realized simultaneously, the advantages of compact structure and high efficiency of the planetary mechanism are realized, the stability of the transmission device can be greatly improved, and the noise is reduced.
Drawings
The above and other features and advantages of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:
FIG. 1 is an exploded view of an exemplary actuator for vehicle seat lift adjustment according to the present invention;
FIG. 2 is an assembled view of an exemplary actuator for vehicle seat lift adjustment according to the present invention;
FIG. 3 is a cross-sectional view taken along axis A in FIG. 2 of an exemplary actuator for vehicle seat lift adjustment according to the present invention;
FIG. 4 is a schematic gear relationship diagram of an NGWN (3Z-I) type planetary gear train employed in a drive according to a specific embodiment of the present invention;
FIG. 5 is a schematic diagram of an NGWN type planetary gear train; and
fig. 6 shows a lid module consisting of NGWN planetary gear train, bevel gear and lid.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples. Any orientation descriptions such as "upper", "lower", "inner", "outer", "radial", "axial", etc. that may be used in the following description are for convenience of description only and are not intended to limit the scope of the present invention unless explicitly described.
Fig. 1 and 2 show an exploded view and an assembled view, respectively, of an exemplary actuator for vehicle seat lift adjustment according to the present invention. The drive 1 comprises a housing 2, a cover 3 adapted to the housing 2, and a transmission which can be a two-stage transmission or, depending on the specific requirements of the power transmission, a further transmission. In the case of a two-stage transmission, as shown in fig. 1, the drive 1 comprises a first stage staggered shaft helical gear worm transmission and a second stage planetary gear transmission having a worm 4 and helical gears 5 meshing with each other and arranged along staggered axes, respectively. Of course, the primary transmission may be replaced by a worm gear as is conventional in the art, such as a single-head worm gear.
In the illustrated embodiment of the invention, the two-stage planetary gear train employs an NGWN planetary gear train, unlike conventional drive designs of the prior art. Planetary gear trains of this type comprise two internal and one external gear pairs, with a common gear wheel which meshes simultaneously with the two transmission members. Compared with the NGW type planetary gear train in the prior art, the NGWN type planetary gear train can be better applied to an automobile seat adjusting driver, because the planetary gear train occupies small space, has more compact structure, better operation stability and lower noise.
Advantageously, a planetary gear train of the NGWN (3Z-I) type can be used in the drive according to the invention for the adjustment of the lifting of a vehicle seat. It should be noted that the 3Z planetary gear train is reasonably used in a mechanical transmission device (such as a seat adjusting driver) which works discontinuously for a short time, and has the characteristics of compact structure, large transmission ratio, high transmission efficiency and the like. In addition, as mentioned in the background section above, the 3Z-type planetary gear train belongs to the NGWN type because of having two internal gear pairs, one external gear pair and one common gear, however, considering the advantages and disadvantages of each of the 3Z-I type, the 3Z-II type and the 3Z-III type in combination, the 3Z-I type planetary gear train is regarded as a preferable solution because of having a relatively high transmission efficiency (η ═ 0.8 to 0.9) and easier to ensure the concentric transmission of the planetary gears.
Figure 3 shows a cross-sectional view of the actuator of figure 2 taken along axis a. Fig. 4 shows a schematic diagram of the transmission relationship of the NGWN (3Z-I) type planetary gear train employed in the drive 1. It can be seen that the planetary gear train comprises a sun gear 6, double planet gears 7 (i.e. comprising integrally formed planet gears 7a and 7b at different levels), a planet carrier 8, a planet shaft 9 for mounting the double planet gears 7 on the planet carrier 8, a fixed annulus gear 10, and an output annulus gear 11. Obviously, the sun gear 6, the ring gear 10 and the output ring gear 11 serve as three central gears in a 3Z-I type planetary gear train; one planet wheel 7a of the double planet wheels 7 acts as a common gear in the NGWN type to engage externally and internally with both the sun wheel 6 and the fixed internal gear ring 10, respectively, while the other planet wheel 7b of the double planet wheels engages internally with the output internal gear wheel 11.
Referring to fig. 3, the helical gear 5, the sun gear 6, the planet carrier 8 and the output internal gear 11 are rotatably mounted on the same support shaft 12 from bottom to top in the axial direction a, the helical gear 5 is non-rotatably coupled with the sun gear 6 (e.g., the helical gear and the sun gear may be preferably integrally formed), the planet carrier 8 and the output internal gear 11 are freely rotatable about the support shaft 12, one end of the support shaft 12 is received in a bearing hole 13 in the case 2 and the other end is received in a central hole 14 of the output internal gear 11. As shown in fig. 5, the ring gear 10 includes a ring gear portion 10a and a flange portion 10b fixed to each other, the ring gear portion 10a being received in a cavity of the flange portion 10b and being relatively non-rotatable with respect to the flange portion 10b by a rotation locking means (e.g., projections and recesses engaged with each other, not specifically shown in the drawings) so as to be integrally and rotationally fixedly received in the lid. It will be understood that it is possible to envisage the inner ring gear being designed in one piece, i.e. the flange portion 10b being formed integrally with the ring gear portion 10a, and it is also possible to envisage fixing the ring gear portion directly in the lid 3, omitting the flange portion.
The power is transmitted and output according to the following routes: referring to fig. 2-4, power is firstly transmitted from the motor 15 to the worm 4 through the power output shaft, the worm 4 is in meshing transmission with the helical gear 5, the helical gear 5 and the sun gear 6 rotate synchronously around the same shaft, a planetary gear 7a at a lower level in the duplex planetary gears 7 carried on the planet carrier 8 is in meshing transmission with both the sun gear 6 and the fixed ring gear 10, so that the whole duplex planetary gears 7 rotate around respective planetary shafts 9, and a module formed by the planet carrier 8 and the duplex planetary gears 7 can rotate freely around a support shaft 12, thereby realizing the revolution of the duplex planetary gears 7 around the sun gear 6; the planet wheel 7b at the upper level of the duplex planet wheels 7 is meshed with the output inner gear 11, so that the output inner gear 11 is driven and the power is finally output through the output inner gear 11.
The NGWN planetary gear train as a whole can be received in a cavity of the lid 3, as shown in fig. 5. According to an embodiment of the present invention, the output gear 16 is integrally formed on the output internal gear 11, and the output gear 16 protrudes to the outside of the cover 3 through the central opening 17 of the cover 3, so as to further transmit power to other transmission components on the seat, such as a sector gear disc on the seat frame, and finally convert the rotation motion of the output gear 16 into the lifting motion, thereby realizing the integral lifting of the seat.
As shown in fig. 6, the NGWN type planetary gear train is mounted to the case cover 3 through a flange portion 10b of the ring gear 10 that matches the case cover 3, and forms a case cover module together with the helical gear 5. In addition, the worm 4 is received within the case 2 and forms a case module together with a motor 15 fixed to the case 2. The cover module and the case module are fixed together by fastening means, such as screws 18 or the like, so that the bevel gear 5 enters into the case 2 to be in meshing relationship with the worm 4, thereby constituting a drive for the car seat lift adjustment, as shown in fig. 2.
According to an embodiment of the present invention, as shown in fig. 1 and 2, the motor 15 is fixed to one side of the case 2 by passing, for example, screws 18 through mounting holes of an end mounting flange of the motor 15 and screwing into fastening holes in a lateral mounting flange of the case 2. It will be understood that the electric motor 15 is arranged in a direction coaxial to the worm arrangement direction B and orthogonal to the power output axis a of the transmission. However, other possible motor arrangements are possible which achieve the above-described functions and objectives.
According to the driver for adjusting the lifting of the automobile seat, the first-stage staggered shaft helical gear and worm transmission mechanism and the second-stage NGWN type (particularly NGWN (3Z-I) type) planetary gear transmission train are adopted, so that the driver not only can occupy small structural space and be more compact in structure, but also can achieve the effect of large transmission ratio, the requirement on the torque of the motor is reduced, and the size and the weight of the motor are reduced. In addition, the self-locking performance of the staggered shaft helical gear and worm transmission structure is utilized, so that the adjusted position of the seat can be stably maintained.
It should be noted that the above-described embodiments should be regarded as merely illustrative, and the present invention is not limited to these embodiments. Various changes and modifications may be made by those skilled in the art without departing from the scope or spirit of the invention in view of the contents of this specification. With a true scope of the invention being indicated by the following claims and their equivalents.
Claims (9)
1. The utility model provides a driver for car seat lifting is adjusted, its include the box, with case lid and the transmission of box adaptation, transmission includes one-level drive mechanism and secondary drive mechanism, its characterized in that, one-level drive mechanism includes meshing each other and follows the helical gear and the worm that crisscross axis arranged respectively, and secondary drive mechanism includes the planetary gear transmission train, wherein, the planetary gear transmission train is NGWN type planetary gear train.
2. The drive of claim 1, wherein the planetary gear train is an NGWN (3Z-I) type planetary gear train.
3. A drive according to claim 2, characterised in that the NGWN (3Z-I) type planetary gear train comprises a sun gear, double planet gears, a planet carrier, a planet shaft for mounting the double planet gears on the planet carrier, an annulus gear and an output annulus gear, wherein the sun gear, the annulus gear and the output annulus gear are three sun gears in the 3Z-I type planetary gear train, the annulus gear is fixed, one planet gear in the double planet gears meshes with both the sun gear and the fixed annulus gear, and the other planet gear in the double planet gears meshes with the output annulus gear.
4. A drive as claimed in claim 3 wherein the bevel gear is non-rotatably coupled to the sun gear such that power from the motor is transmitted through the worm and bevel gear and ultimately output through the output annulus gear.
5. A drive according to claim 4, wherein the bevel gear, the sun gear, the planet carrier and the output annulus gear are rotatably mounted on the same support shaft, one end of which is received in a bearing bore in the housing and the other end of which is received in a central bore in the output annulus gear.
6. The drive according to any one of claims 3 to 5, characterized in that the output end of the output internal gear is integrally formed with a coaxial output gear which protrudes through a central opening of the cover to connect with a sector-shaped toothed disc on a seat frame, so that the lifting height adjustment of the car seat is achieved.
7. The drive of any one of claims 1 to 5, wherein the NGWN planetary gear train is received entirely within the cover and forms a cover module together with the bevel gear, the worm is received within the case and forms a case module together with a motor fixed to the case, the cover module and the case module being secured together by fastening means to form the drive.
8. A car seat, characterized by comprising an actuator according to any one of claims 1 to 7.
9. The car seat of claim 8, wherein the actuator is secured to a lateral mounting plate of the car seat frame by a mounting bolt passing through a mounting hole in the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810649510.XA CN110626232A (en) | 2018-06-22 | 2018-06-22 | Drive for adjusting the lifting of a vehicle seat and vehicle seat with such a drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810649510.XA CN110626232A (en) | 2018-06-22 | 2018-06-22 | Drive for adjusting the lifting of a vehicle seat and vehicle seat with such a drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110626232A true CN110626232A (en) | 2019-12-31 |
Family
ID=68967289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810649510.XA Pending CN110626232A (en) | 2018-06-22 | 2018-06-22 | Drive for adjusting the lifting of a vehicle seat and vehicle seat with such a drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110626232A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113120221A (en) * | 2021-03-11 | 2021-07-16 | 重庆大学 | Heavy-load high-speed-ratio rotating mechanism for electrically overturning and folding wings |
| CN113691074A (en) * | 2021-09-11 | 2021-11-23 | 陈效 | Structure of secondary transmission part of automobile seat lifting motor with zero tooth difference output |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202827204U (en) * | 2012-09-04 | 2013-03-27 | 上海延锋江森座椅有限公司 | Adjusting device of automobile seat electric angle adjustor |
| US20130134759A1 (en) * | 2011-11-25 | 2013-05-30 | Delta Kogyo Co., Ltd. | Reclining mechanism |
| CN203920474U (en) * | 2014-06-17 | 2014-11-05 | 上海胜华波汽车电器有限公司 | Fold/the lifting motor of seat that a kind of energy-saving low-noise driving efficiency is high |
| US20140346832A1 (en) * | 2011-09-14 | 2014-11-27 | Thomas Jung | Fitting system for a vehicle seat |
| CN106143222A (en) * | 2016-06-29 | 2016-11-23 | 上海延锋江森座椅机械部件有限公司 | Seat height-adjusting system based on 3Z gear mechanism |
| CN208324966U (en) * | 2018-06-22 | 2019-01-04 | 广东肇庆爱龙威机电有限公司 | For the driver of automotive seat lifting adjusting and with the automotive seat of the driver |
-
2018
- 2018-06-22 CN CN201810649510.XA patent/CN110626232A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140346832A1 (en) * | 2011-09-14 | 2014-11-27 | Thomas Jung | Fitting system for a vehicle seat |
| US20130134759A1 (en) * | 2011-11-25 | 2013-05-30 | Delta Kogyo Co., Ltd. | Reclining mechanism |
| CN202827204U (en) * | 2012-09-04 | 2013-03-27 | 上海延锋江森座椅有限公司 | Adjusting device of automobile seat electric angle adjustor |
| CN203920474U (en) * | 2014-06-17 | 2014-11-05 | 上海胜华波汽车电器有限公司 | Fold/the lifting motor of seat that a kind of energy-saving low-noise driving efficiency is high |
| CN106143222A (en) * | 2016-06-29 | 2016-11-23 | 上海延锋江森座椅机械部件有限公司 | Seat height-adjusting system based on 3Z gear mechanism |
| CN208324966U (en) * | 2018-06-22 | 2019-01-04 | 广东肇庆爱龙威机电有限公司 | For the driver of automotive seat lifting adjusting and with the automotive seat of the driver |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113120221A (en) * | 2021-03-11 | 2021-07-16 | 重庆大学 | Heavy-load high-speed-ratio rotating mechanism for electrically overturning and folding wings |
| CN113691074A (en) * | 2021-09-11 | 2021-11-23 | 陈效 | Structure of secondary transmission part of automobile seat lifting motor with zero tooth difference output |
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