CN102700446A

CN102700446A - Motorized lumbar support system driver

Info

Publication number: CN102700446A
Application number: CN2012101798344A
Authority: CN
Inventors: 舒易久; 刘金涛
Original assignee: DONGGUAN LINGRUI TRANSMISSION TECHNOLOGY CO LTD; Dongguan Lingrui Automobile Parts Co ltd
Current assignee: DONGGUAN LINGRUI TRANSMISSION TECHNOLOGY CO LTD; Dongguan Lingrui Automobile Parts Co ltd
Priority date: 2012-05-19
Filing date: 2012-05-19
Publication date: 2012-10-03

Abstract

The invention relates to the technical field of take-up and pay-off devices, in particular to a driving device of an electric waist support system; the invention comprises a box body, an upper cover, a worm wheel, a wire wheel and an eccentric wheel, wherein the box body and the upper cover are combined into a box body, the box body is provided with a wire outlet groove, the worm wheel is arranged in the box body and matched with the worm, the worm wheel axially drives the eccentric wheel with eccentric motion, and the eccentric wheel axially drives the wire wheel; the invention adopts the scheme that the worm wheel drives the eccentric wheel which eccentrically moves and the eccentric wheel drives the wire wheel, the outer diameter of the worm wheel can be greatly reduced, the number of teeth outside the worm wheel is greatly reduced, and the difference between the number of teeth of the eccentric wheel and the number of teeth of the wire wheel is very small, so that the integral volume is smaller, the rigidity of the worm wheel is improved, the stacked multi-stage transmission is adopted, the large transmission ratio is realized, the integral stability is better, and the service life is longer.

Description

Electronic waist holder system driving device

Technical field

The present invention relates to the take-up and pay-off device technical field, refer in particular to a kind of electronic waist holder system driving device.

Background technology

The motor vehicle seat back control system is to produce the effect that waist is regulated through drag-line pulling back-rest means for chair, includes two kinds of manual regulation and motorized adjustment, wherein; The actuator of motorized adjustment, its principle of work are to drive the rotation of worm drive worm gear through high-speed electric expreess locomotive; Simultaneously, worm gear inside is combined with one or more planetary gear train again, and planetary gear train is assemblied in again on the line wheel; The line wheel drives drag-line again, to realize the deceleration between motor and the drag-line, regulates the motor vehicle seat back device.

Aforementioned prior electric is regulated actuator, and its main shortcoming has, because the rotating speed of driven by motor worm screw rotation is bigger; In order to make line wheel retractable cable slowly, then the external diameter of worm gear is made greatlyyer, and the number of teeth of inside and outside gear ring is more; Monodentate is thinner, and with for example 100: 1 one-level transmission deceleration of realization, thereby actuator single-piece volume is bigger; Institute takes up space bigger, and the rigidity that worm gear is made is not enough, possibly cause problems such as weak point, instability in service life.

Therefore, based on the defective that above-mentioned prior electric is regulated actuator, need regulate actuator to prior electric and improve.

Summary of the invention

The deficiency that the objective of the invention is to prior art provides a kind of electronic waist holder system driving device, and this electronic waist holder system driving device has solved prior electric, and to regulate actuator existing: defectives such as external diameter is big, the number of teeth is more, volume is big, rigidity is not enough, service life is short, stability is not enough.

For realizing above-mentioned purpose, the present invention realizes through following technical scheme:

Electronic waist holder system driving device comprises casing, loam cake, worm screw, worm gear, line wheel, eccentric wheel, and casing and loam cake are combined into box body; Box body has the wire casing of going out, and has worm gear in the casing, and worm gear cooperates with worm screw; Worm-wheel shaft has the eccentric wheel of eccentric motion to driving, and camshaft is taken turns to drive wire.

Concrete, said worm gear middle part axially is protruding with the biasing post that departs from the worm gear axis, and the eccentric wheel center has trepanning, and biasing post is arranged in the trepanning.

More specifically, between the center of said casing and loam cake radius stay is installed, the center of worm gear has first knock hole, and this first knock hole passes biasing post, and the center of line wheel has second knock hole, and radius stay is arranged in first knock hole, second knock hole.

Further, said eccentric wheel is sheathed in the poor location minute wheel, and the poor location minute wheel is fixed in the casing, the internal tooth on the go engagement of eccentric external tooth and poor location minute wheel.

Further, the outside of said poor location minute wheel has positioning teeth, has the hole clipping that cooperates with positioning teeth in the casing.

Can be, line wheel bottom has a plurality of drive post, offers the drive hole of corresponding drive post quantity on the eccentric wheel, and drive post and cooresponding drive hole are tangent.

Can also be, line wheel bottom has the lower edge, and the lower edge has internally toothed annulus, the internally toothed annulus on the go engagement of eccentric external tooth and lower edge, line wheel bottom.

Said line wheel has the embedding hole of fixed outer drag-line.

The said casing outside has the worm screw seat.

Said line wheel top has limiting stopper, and the loam cake bottom has the position-limited trough that supplies limiting stopper to move.

Beneficial effect of the present invention is: adopt the eccentric wheel of worm-gear driven eccentric motion, the scheme of eccentric wheel drive wire wheel, the external diameter of worm gear can reduce greatly, and the exterior number of teeth of worm gear significantly reduces; The number of teeth of eccentric wheel and line wheel differs very little; Thereby the single-piece volume is less, and the rigidity of worm gear improves, and adopts stacked multistage transmission; Realize big speed ratio, resistance to overturning is better, service life is longer.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention one;

Fig. 2 is the STRUCTURE DECOMPOSITION scheme drawing of the embodiment of the invention one;

Fig. 3 is the STRUCTURE DECOMPOSITION scheme drawing of another angle of the embodiment of the invention one;

Fig. 4 is the structural representation of the embodiment of the invention two;

Fig. 5 is another angle structural representation of the embodiment of the invention two;

Fig. 6 is the STRUCTURE DECOMPOSITION scheme drawing of the embodiment of the invention two;

Fig. 7 is the STRUCTURE DECOMPOSITION scheme drawing of another angle of the embodiment of the invention two;

Element and Reference numeral:

Fig. 1---among Fig. 7:

Casing 11, loam cake 12,

Worm screw 13, worm gear 14,

Line wheel 15, eccentric wheel 16,

Positioning teeth 17, biasing post 18,

Trepanning 19 goes out wire casing 20,

Radius stay 21, the first knock holees 22,

Second knock hole 23, drive post 24,

Poor location minute wheel 25, motor 26,

Installing and locating piece 27, opening 28,

Worm screw seat 29, embedding hole 30,

Drive hole 31, hole clipping 32,

Limiting stopper 151, position-limited trough 121.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is further described.

Like Fig. 1---Fig. 3, be the embodiment one of the electronic waist holder of the present invention system driving device, comprise casing 11, loam cake 12, worm screw 13, worm gear 14, line wheel 15, eccentric wheel 16; Casing 11 is locked at through screw with loam cake 12 and constitutes a box body, has worm gear 14 in the casing 11, and worm gear 14 cooperates with worm screw 13; Worm screw 13 is driven by motor 26 and rotates; Worm screw 13 drives worm gear 14 rotations, and worm gear 14 drives the eccentric wheel 16 of eccentric motion, makes eccentric wheel 16 produce eccentric motion; Eccentric wheel 16 drive wires wheel 15, line wheel 15 is fixed with drag-line; Worm gear 14 axially drives the eccentric wheel 16 that eccentric motion is arranged, eccentric wheel 16 axial drive wire wheels 15.

The present invention drives worm screw 13 fast rotational through motor 26, drives worm gear 14 and slowly rotates, and axially drives eccentric wheel 16 again and rotates, and axial more at last drive wire wheel 15 rotates, and realizes retractable cable.

The present invention adopts worm gear 14 to drive the eccentric wheel 16 of eccentric motion, the scheme of eccentric wheel 16 drive wires wheel 15, and the external diameter of worm gear 14 can reduce greatly, and the worm gear 14 exterior numbers of teeth significantly reduce; Simultaneously; Eccentric wheel 16 differs very little with the number of teeth of line wheel 15, thereby the single-piece volume is less, and the rigidity of worm gear 14 improves; Realize big speed ratio, product stability is better, service life is longer.

Said worm gear 14 middle parts are protruding with biasing post 18 in the side towards eccentric wheel 16 vertically; This biasing post 18 departs from the axis of worm gear 14; Eccentric wheel 16 middle parts have trepanning 19; Biasing post 18 is arranged in the trepanning 19, and the size of biasing post 18 is big or small consistent with trepanning 19, produces the eccentric motion of relative worm gear 14 axis to drive eccentric wheel 16.

Between the center of said casing 11 and loam cake 12 radius stay 21 is installed, shown in figure, casing 11 has outwards outstanding position, hole respectively with loam cake 12; It promptly is the position of plug-in mounting radius stay 21; Wherein, the center of worm gear 14 has first knock hole 22, and this first knock hole 22 passes biasing post 18; The center of line wheel 15 has second knock hole 23, and radius stay 21 is arranged in first knock hole 22, second knock hole 23; Worm gear 14, eccentric wheel 16, line wheel 15 are that center shaft produces rotation with this radius stay 21 promptly.

Said line wheel 15 and poor location minute wheel 25 are parts independently, and poor location minute wheel 25 cooperates generation to locate the effect of difference with eccentric wheel 16, promptly; The biasing post 18 of worm gear 14 drives rotatablely move (revolution) that eccentric wheel 16 produces relative worm gear 14 axis; Also because eccentric wheel 16 cooperates with poor location minute wheel 25 teeth, make rotatablely move (rotation) of relative self axis of eccentric wheel 16 generations simultaneously, utilize this compound motion of eccentric wheel 16; Drive 15 rotations of line wheel, realize the retractable line.

Concrete, poor location minute wheel 25 not only has internal tooth, and its outside also has positioning teeth 17; Have hole clipping 32 in the casing 11, the positioning teeth 17 of poor location minute wheel 25 is arranged in the hole clipping 32 of casing 11, and positioning teeth 17 is located at the end on the upper side of poor location minute wheel 25; Simultaneously, hole clipping 32 corresponding settings, poor location minute wheel 25 is fixed in the casing 11; Eccentric wheel 16 is sheathed in the poor location minute wheel 25; Eccentric wheel 16 produces eccentric motion in this poor location minute wheel 25, the internal tooth on the go engagement of the external tooth of eccentric wheel 16 and poor location minute wheel 25, and said here engagement is a kind of matching relationship.

In the present embodiment, cooperate with eccentric wheel 16 in order to make line wheel 15, line is taken turns 15 bottoms and is had a plurality of drive post 24; Simultaneously; Offer the drive hole 31 of corresponding drive post 24 quantity on the eccentric wheel 16, drive line wheel 15 through drive post 24 when eccentric wheel 16 rotates and rotate, realize retractable cable.

More specifically; Drive post 24 is online takes turns the merry-go-round arrangement that 15 bottoms are centrosymmetric, and the merry-go-round arrangement that drive hole 31 is centrosymmetric on eccentric wheel 16 is during assembling; Because eccentric wheel 16 relative line wheels 15 are accentrics; Therefore, can make each drive post 24 and cooresponding drive hole 31 tangent, but line wheel 15 and eccentric wheel 16 relative positionings.

Can be known that by above analysis the external diameter of worm gear 14 of the present invention can be made to such an extent that existing product is littler relatively, the number of teeth of worm gear 14 can reduce; Simultaneously, can the number of teeth of eccentric wheel 16, line wheel 15 be reduced, with the oversized of single tooth; Also further increased the rigidity of worm gear 14, eccentric wheel 16, poor location minute wheel 25; Improve stability, realize big speed ratio, prolong their service life.

Said casing 11 has the wire casing of going out 20, and going out wire casing 20 has two, and shown in figure, two go out wire casing 20 and are symmetrical set, and can comply with actual condition of service and installation site, and which confirms to use go out wire casing 20, also can use simultaneously.

The side of said line wheel 15 forms winding space; Have embedding hole 30 on the said line wheel 15, be used for fixing the termination of drag-line,, two drag-lines are installed, then need offer two embedding holes 30 if use two to go out wire casing 20 simultaneously.

Said casing 11 outsides have installing and locating piece 27, can this product be fixed on the external device (ED) through this installing and locating piece 27.

For reducing the volume of product; One side of said casing 11 has opening 28, and the part of worm gear 14 sees through this opening 28 and cooperates with worm screw 13, and the side elongation moulding that casing 11 is positioned at this opening 28 has worm screw seat 29; Be used to place worm screw 13, motor 26 can directly lock onto on the casing 11 through screw.

Said line is taken turns 15 tops and is had limiting stopper 151, and loam cake 12 bottoms have the position-limited trough 121 that supplies limiting stopper 151 to move, and for example, this position-limited trough 121 can be designed to 120 degree, and the maximum anglec of rotation of line wheel 15 is 120 degree so.Adopt limiting stopper 151 to be positioned at the structure at the top of line wheel 15, be positioned at the outside of line wheel 15 than limiting stopper 151, can conserve space, reduce the volume of product.

The box body of casing 11 of the present invention and loam cake 12 combinations, sizableness is in 1/3rd of existing product.

Like Fig. 4---Fig. 7; Be the embodiment two of the electronic waist holder of the present invention system driving device, not shown drag-line is on the structure; Different are for embodiment two and embodiment one; Line is taken turns 15 bottoms and is had the lower edge, and the lower edge has internally toothed annulus, and the external tooth of eccentric wheel 16 and line are taken turns the internally toothed annulus on the go engagement of lower edge, 15 bottom; Eccentric wheel 16 is sheathed in the lower edge of line wheel 15, and eccentric wheel 16 produces eccentric motion in this lower edge, the external tooth of eccentric wheel 16 and the engagement of internally toothed annulus on the go.Certainly, with respect to embodiment one, the thickness of eccentric wheel 16 will increase, with line of engagement wheel 15.What produce based on eccentric wheel 16 is a kind of eccentric motion, moves in a circle with respect to biasing post 18 simultaneously, can be designed to worm gear 14 and rotate weeks, and eccentric wheel 16 and line are taken turns 2 tooth positions of internally toothed annulus engagement of 15 lower edges, and isochrone wheel 15 also rotates 2 tooth positions.

The present invention can be applied to the driving of the back of seat device of automobile and regulate, and can also be applied to realize on other similar products like the automatic deploying and retracting line.

The present invention can do suitable variation, and for example, the positioning teeth 17 of poor location minute wheel 25 is arranged in the hole clipping 32 of casing 11, just can be with the be provided with location swap of positioning teeth 17 with hole clipping 32.

Claims

1. The driving device of the electric lumbar support system is characterized in that it includes a box body, an upper cover, a worm, a worm wheel, a wire wheel, and an eccentric wheel. The box body and the upper cover are combined into a box body, the box body has an outlet slot, and the box body has a worm wheel , The worm gear cooperates with the worm, the worm gear axially drives the eccentric wheel with eccentric motion, and the eccentric wheel axially drives the wire wheel.

2. The driving device of the electric lumbar support system according to claim 1, characterized in that: the middle part of the worm wheel protrudes axially from an eccentric column that deviates from the central axis of the worm wheel, and the center of the eccentric wheel has a sleeve hole, and the eccentric column penetrates the sleeve inside the hole.

3. The driving device of the electric lumbar support system according to claim 2, characterized in that: a positioning rod is installed between the center of the box body and the upper cover, the center of the worm wheel has a first positioning hole, and the first positioning hole Through the eccentric column, the center of the wire wheel has a second positioning hole, and the positioning rod is passed through the first positioning hole and the second positioning hole.

4. The driving device of the electric lumbar support system according to claim 3, characterized in that: the eccentric wheel is sleeved in the positioning differential wheel, the positioning differential wheel is fixed in the box, and the outer teeth of the eccentric wheel and the positioning differential wheel The internal teeth mesh in motion.

5. The driving device of the electric lumbar support system according to claim 4, characterized in that: the outer side of the positioning differential wheel has positioning teeth, and the box body has clamping holes that cooperate with the positioning teeth.

6. The driving device of the electric lumbar support system according to claim 4 or 5, characterized in that: the bottom of the wire wheel has a plurality of driving columns, and the eccentric wheel is provided with driving holes corresponding to the number of driving columns, and the driving columns are connected with the corresponding driving columns. The hole is tangent.

7. The driving device of the electric lumbar support system according to claim 4 or 5, characterized in that: the bottom of the wire wheel has a lower edge, and the lower edge has an inner gear ring, and the outer teeth of the eccentric wheel and the inner teeth of the lower edge of the bottom of the wire wheel The loops mesh in motion.

8. The driving device of the electric lumbar support system according to claim 4, wherein the wire wheel has an embedded hole for fixing an external cable.

9. The driving device of the electric lumbar support system according to claim 4, characterized in that: the outer side of the box has a worm seat.

10. The driving device of the electric lumbar support system according to claim 4 or 5, characterized in that: the top of the wire wheel has a limit block, and the bottom of the upper cover has a limit groove for the limit block to move.