CN101323264B

CN101323264B - Seat height adjuster

Info

Publication number: CN101323264B
Application number: CN2008100231231A
Authority: CN
Inventors: 邹耀忠
Original assignee: Individual
Current assignee: JIANGSU ZHONGMING XIANGHE SEIKO Co Ltd
Priority date: 2008-07-14
Filing date: 2008-07-14
Publication date: 2010-06-23
Anticipated expiration: 2028-07-14
Also published as: CN101323264A

Abstract

A height regulator for a seat belongs to an automobile seat component, which comprises a first case which is provided with a first cavity, a second case which is connected with a side plate of the seat basin and is provided with a second cavity and a third axle hole, a first axle core a second axle core and a big roller which are arranged between the first cavity and the second cavity, a fan-shaped gear block which is connected with a seat cushion of the seat as well as a return spring and a wrench which are separately arranged at the outer side of the cover of the first case. The regulator has the advantages of small volume, simple structure and convenient installation; only one height regulator is needed on each seat, which can save usage cost; the movement has the good flexibility and the firm locking; as friction is used for driving and no space and gears exist between components, the operation is soft, flexible and energy-saving and the regulatory accuracy can be ensured; as the scope of the reciprocating motions of a wrench is small, the use space of the seat can be effectively increased; the free connection with any seat can be realized and the connection is simple; the height regulator for the seat of the invention has the wide application scope.

Description

Seat height adjuster

Technical field

The present invention relates to vehicle seat used height adjuster between a kind of seat frame that is used to be installed in seat and the basin side plate, that can suitably regulate height of seat, belong to the seat accessory.

Background technology

Vehicle seat used arrangement for adjusting height in the past, be arranged between the upper rail and seat cushion that constitutes seat sliding apparatus, the miniature gears of minor diameter is installed on operating axis, and on the large diameter quadrant gear that is meshed with miniature gears, control lever is installed, thereby makes the miniature gears rotation regulate the height of seat via quadrant gear by operating operation bar up and down.The arrangement for adjusting height that this is vehicle seat used has the brake wheel that moves up and down that stops lifting mechanism, when the operating operation bar, do not braked, but when from seat cushion side applied load, the structure that can utilize brake wheel to brake.But, above-mentioned vehicle seat used arrangement for adjusting height, owing to be the friction-type locking that utilizes brake wheel, so not only operating aspect is still waiting to improve, and the seat rigidity is so not high yet.In view of above technology, provide a kind of in for CN 1799899A by adopting the mechanical type locking can improve the seat rigidity and having improved the control apparatus of seat operation sense, fine-tuning joint at publication number.This seat adjustment device is engaged on the straight gear latch piece by operating handle off and on, makes straight gear rotation and actuating arm moves the lifting that realizes seat.The existing problem of above-mentioned open source literature: at first, utilize the gear transmission principle of machinery to realize lifting action, complex structure not only, parts are many, and need to install two arrangement for adjusting height at least on a seat, the use cost height; Secondly, adopt the worm and gear transmission, speed ratio is big, and governing speed is slow and operate cumbersome; Again, have assemblage gap between each parts, it is poor to cause degree of regulation.

And for example, German patent application DE 32 03 151 A1 disclose a kind of seat control apparatus, this device comprise an actuator that drives contrarotation with one thus actuator drive, also can contrarotation sway be driven unit, in the disclosed device of this patent application, at actuator and be driven the freewheel that has disposed two one-sided effects between the part.Above-mentioned freewheel is joined together, with opposite direction operation, like this, the blocked direction of first freewheel is corresponding to the direction of second freewheel free-running operation, and second blocked direction of freewheel is corresponding to the direction of first freewheel free-running operation.Described two flywheels all are furnished with common (interior) gear ring (zig-zag) along its circumference.The freewheel of each one-sided effect has (independent) brake component or ratchet, is fixedly mounted on rotationally on the corresponding bearing bolts on the above-mentioned actuator, and presses on gear ring in spring-loaded mode.For this purpose and the spring of configuration is a spiral spring, as extension spring, the end of one side is connected with the ratchet of first freewheel, and the other end is connected with the ratchet of second freewheel.At being driven the rotation of part with respect to actuator, in the disclosed structure of DE 32 03 151 A1, be provided with tripper, under each situation, a freewheel is discharged from engagement.This tripper constitutes by the hollow semi-cylindrical axle collar, extends to rotatable installing type handwheel, and this handwheel is as the driving executive device that drives unit.If external torque acts on and selects S. A. rotation on the handwheel, so, according to the direction of moment of torsion, under each situation, this moment of torsion loads on the ratchet or on the freewheel as its component part, thereby makes it jump out of mesh; And, if the moment of torsion on the handwheel continue to exist and change of direction not, knock and be fixed on the latch different that drives in the unit with aforementioned latch, like this, be subjected to the handwheel of external torque effect will drive the engagement of this actuator by its axle collar one corresponding ratchet with and rotate with being connected of stop pin on the actuator.Actuator and then driving are driven part, be rotated via another one-sided effect freewheel that still is in engagement, and constitute the gear ring of these two freewheels on driven element.To be driven part and to rotate in order to make around opposite sense, but the moment of torsion of adversary's wheel effect opposite orientation.Disclosed this device of DE 32 03 151A1 is very suitable for the seat regulating mechanism in principle, and still, the shortcoming of this configuration is that degree of regulation is poor.Based on above technology, in CN 101073996A, a kind of seat control apparatus that can realize accurate adjustment is disclosed again.This device comprises through driving with the actuator of positive and negative both direction rotation with by what this actuator drove and is driven part, the freewheel that also comprises two one-sided effects, be arranged on actuator and be driven between the part, be joined together operation in the opposite direction, and one of them freewheel can be discharged from engagement by tripper.In addition, described device also comprises reset attachment, by this reset attachment, when actuator departs from neutral gear, can be back to neutral gear automatically, with the degree of precision that is driven part that guarantees to be driven by actuator.Above-mentioned arrangement for adjusting height with the hand wheel type operation, the problem of existence: 1, adopt operated by handwheel, feel is poor; 2, realize unidirectional location by inner gear with combining of shifting block, the locking firmness is poor; 3, in order to guarantee degree of regulation, higher to the processing request of part, make difficulty, and be difficult to guarantee stiffness.

Summary of the invention

The objective of the invention is to provide a kind of simple in structure, the number of parts that adopts is few, volume is little, dexterity of action good, adjustings is laborsaving, precision is high, reliable lock, spanner crank motion scope are little, and can be connected with any seat and realize seat height adjuster to the height of seat adjusting.

The object of the present invention is achieved like this, a kind of seat height adjuster, it comprises first case with first die cavity, be used for connect and second case that have second die cavity and third axle hole of seat basin side plate with seat, place first respectively, primary shaft core between second die cavity, second core, big roller, and be used for the sector tooth block that the seat frame with seat connects, return spring with the cover cap outside that lays respectively at first case, spanner, described first case is fixed on second case, the cover cap outside at first case has extended boss, the return spring fixing lug boss, the centre of boss is provided with first axis hole, first axis hole communicates with first die cavity, extended little roller positioning boss in the cover cap inboard of first case, offer a pair of position-limited trough on the cover cap of first case, a pair of position-limited trough is distributed in the both sides of return spring fixing lug boss; Described primary shaft core comprises the outer ring shifting block, drive block, dial, little roller, the return cushion block, described outer ring shifting block is an annular solid, the centre of annular solid is a central bore, described drive block is a disking body, the centre is provided with first splined hole, one side of described dial is provided with first spline, be provided with moving tooth between opposite side, the centre of moving tooth is formed with the chamber of stepping down, the centre of first spline is provided with second axis hole, second axis hole communicates with the chamber of stepping down, the outer ring shifting block places first die cavity of first case, drive block is installed on first spline by first splined hole and is arranged in the central bore of outer ring shifting block, described little roller, the return cushion block is filled in the annular chamber that inner periphery surrounded of the excircle of drive block and central bore with being set in distance respectively, and little roller cooperates with little roller positioning boss and realizes the location; Described second core comprises main shaft, the inner ring shifting block, pad, be formed with first step on the main shaft successively, second spline, second step, external tooth, in the middle of the end of main shaft, be provided with the tightening screw hole near external tooth one end, pad in the form of sheets, be set on second spline of main shaft and paste and touch with second step, the centre of inner ring shifting block offers second splined hole, the moving tooth embeded slot has been intervally installed on the excircle, big roller contact surface, the inner ring shifting block is installed on second spline of main shaft and places in the chamber of stepping down of dial by second splined hole, make on the dial moving tooth respectively with moving tooth embeded slot scarf, moving tooth places second die cavity of second case, between adjacent moving tooth, be filled with big roller, big roller respectively with big roller contact surface, and the chamber wall subsides of second die cavity are touched, one end of main shaft inserts in first axis hole of first case after passing second axis hole by first step, the other end of main shaft by the third axle hole inserting on the second step and second case after, external tooth is extended to outside second case; On the fixing present frame of one end of described sector tooth block, offer fan-shaped teeth groove in the middle of the other end, at the upper edge of teeth groove Zhou Buyou internal tooth, the external tooth of described main shaft probes in the teeth groove, and be meshed with internal tooth, sector tooth block by a fix screw after passing teeth groove with main shaft on the tightening screw hole revolve and join the connection that realizes with main shaft; Described return spring places on the boss of first case, and the two ends of return spring are formed with first, second return spring pin, and first, second return spring pin cooperates with the return spring fixing lug boss respectively and realizes locating; The centre of described spanner is provided with and is used for the boss mounting hole that the confession boss passes through, the upper edge of spanner is provided with and is used to be entrenched in the middle return support that makes the spanner self-return of first, second return spring pin, also be formed with a pair of positive stop lug boss on the spanner of return support both sides, a pair of positive stop lug boss is fixed with the outer ring shifting block that is positioned at first die cavity behind a pair of position-limited trough that passes on first case.

The present invention is provided with first lug between on the case outer of described first case, on first lug, offer first rivet hole, correspondingly, on the case outer of described second case, offer second rivet hole, with cooperating of first, second rivet hole first case is fixed on second case by self-plugging rivet.

The present invention is being provided with the case positioning boss between also on the case outer of described first case, correspondingly, is being provided with the knock hole that is used for for the inserting of case positioning boss between also on the case outer of described second case.

The present invention is formed with a pair of second lug on the outer of described outer ring shifting block, on a pair of second lug, offer screw hole respectively, correspondingly, centre at a pair of positive stop lug boss of described spanner offers screw, a pair of connecting screw behind the screw that passes respectively in the middle of a pair of positive stop lug boss with a pair of second lug on screw hole be rotated with, thereby can realize a pair of positive stop lug boss of spanner and fixing of outer ring shifting block.

Be formed with the return cushion block contact surface that is used for the little roller contact surface that cooperates with little roller and is used for cooperating on the inner periphery of the central bore of outer ring of the present invention shifting block respectively, be set in distance between little roller contact surface and the return cushion block contact surface with the return cushion block.

The centre of pad of the present invention offers the center splined hole, and pad is set on second spline of main shaft by the center splined hole.

The vertical sectional shape of moving tooth of the present invention is fan-shaped, and the inboard of fan-shaped dual-side constitutes and is used for the inner ring shifting block thrust face that contacts with the moving tooth embeded slot, and the outside of fan-shaped dual-side constitutes and is used for the big roller thrust face that contacts with big roller.

The middle part of spanner of the present invention is formed with the spanner cavity, and return spring is contained in the die cavity that cover cap surrounded of the spanner cavity and first case.

The present invention also is formed with a pair of the 3rd lug on the case outer of described second case, offer a lug connecting bore that the basin side plate gets on that is used for second case is attached to seat on a pair of the 3rd lug.

The quantity of moving tooth embeded slot of the present invention and moving tooth is identical, vertical sectional shape matches.

The present invention is because after adopting said structure, and one of advantage that has, volume are little, simple in structure, easy to assembly, and only need a height adjuster is installed on every seat, can save use cost; Two, dexterity of action is good, locking is firm; Three, utilize the friction force transmission, very close to each other between each parts, do not have gear, operate softly, flexible, laborsaving, can guarantee degree of regulation; Four, spanner crank motion scope is little, can effectively increase the usage space of seat; Five, can realize and any being connected and connecting simply between the seat, applied widely.

Description of drawings

Fig. 1 is one embodiment of the invention shaft side figure.

Fig. 2 is the shaft side figure after each parts decomposes among Fig. 1.

Fig. 3 is the shaft side figure on the other direction after each parts decomposes among Fig. 1.

Fig. 4 is the present invention's installation application examples reference diagram on the seat.

Among the figure: 1. connecting screw; 2. spanner, 21. boss mounting holes, 22. return supports, 221. first return faces, 222. second return faces, 23. positive stop lug boss, 24. screws, 25. spanner cavitys; 3. return spring, 31. first return spring pin, 32. second return spring pin; 4. first case, 41. first die cavities, 42. boss, 43. first axis holes, 44. first lugs, 441. first rivet holes, 45. return spring fixing lug boss, 46. position-limited troughs, 47. little roller positioning boss, 48. case positioning boss; 5. step down chamber, 54. little rollers, 55. return cushion blocks of primary shaft core, 51. outer ring shifting blocks, 511. second lugs, 5111. screw holes, 512. central bore, 5121. little roller contact surfaces, 5122. return cushion block contact surfaces, 52. drive blocks, 521. first splined holes, 53. dials, 531. first splines, 532. second axis holes, 533. moving teeth, 5331. inner ring shifting block thrust faces, 5332. big roller thrust faces, 534.; 6. big roller; 7. second core, 71. main shafts, 711. first steps, 712. second splines, 713. second steps, 714. external tooths, 715. tightening screw holes, 72. inner ring shifting blocks, 721. second splined holes, 722. big roller contact surfaces, 723. moving tooth embeded slots, 73. pads, 731. center splined holes; 8. second case, 81. second die cavities, 82. third axle holes, 83. the 3rd lugs, 831. lug connecting bores, 84. second rivet holes, 85. knock holees; 9. sector tooth block, 91. fixed shaft holes, 92. teeth groove, 921. internal tooths; 10. fix screw; 20. self-plugging rivet; 30. seat basin side plate; 40. seat frame.

The specific embodiment

Please refer to Fig. 1 and in conjunction with Fig. 2, Fig. 3, Fig. 4, spanner 2 of the present invention adopts metallic material to strike out sheet, be provided with in the centre of spanner 2 and be used for the boss mounting hole 21 that the boss 42 for first case 4 passes through, be provided with in the upper edge of spanner 2 and be used to be entrenched in first, the second return spring pin 31, the return support 22 that makes the spanner self-return in the middle of 32, on the spanner of return support 22 both sides, also be formed with a pair of positive stop lug boss 23, offering through hole in the centre of a pair of positive stop lug boss 23 is screw 24, simultaneously for the ease of at the ccontaining return spring 3 in the cover cap outside of first case 4, the middle part of spanner 2 slightly outwards is convexly equipped with and is formed with spanner cavity 25.First case 4 of the present invention adopts plastic injection-moulded shaping, cover cap on first case 4, first die cavity 41, boss 42, return spring fixing lug boss 45, a pair of position-limited trough 46, first lug 44 and little roller positioning boss 47, case positioning boss 48 is integrally formed when injection molded, wherein: boss 42, return spring fixing lug boss 45 is located at the cover cap outside of first case 4, offering through hole in the centre of boss 42 is first axis hole 43, first axis hole 43 communicates with first die cavity 41 of first case 4, little roller positioning boss 47 has a plurality of, 4 have been illustrated among the figure, 4 little roller positioning boss 47 are distributed on the cover cap inner side surface of first case 4 evenly and at intervals, a pair of position-limited trough 46 is waist shape, be located on the cover cap of first case 4, and be positioned at the both sides of return spring fixing lug boss 45, first lug 44, little roller positioning boss 47 all has a plurality of, be located at respectively on the case outer of first case 4, on first lug 44, offer first rivet hole 441 that is used for cooperating with self-plugging rivet 20.Primary shaft core 5 of the present invention comprises outer ring shifting block 51, drive block 52, dial 53, little roller 54, return cushion block 55, wherein: outer ring shifting block 51 is an annular solid, the centre of annular solid is a central bore 512, be formed with a pair of second lug 511 on the outer, a pair of second lug 511 is used for corresponding with a pair of positive stop lug boss 23, on a pair of second lug 511, offer respectively and be convenient to and the fixing screw hole 5111 of positive stop lug boss 23, on the inner periphery of central bore 512, be formed with respectively and be used for the little roller contact surface 5121 that cooperates with little roller 54, with the return cushion block contact surface 5122 that is used for cooperating, be set in distance between little roller contact surface 5121 and the return cushion block contact surface 5122 with return cushion block 55; Drive block 52 is a disking body, and the centre is provided with first splined hole 521; One side of dial 53 is provided with first spline 531, be provided with moving tooth 533 between opposite side, the centre of moving tooth 533 is formed with the chamber 534 of stepping down, it is second axis hole 532 that the centre of first spline 531 is provided with through hole, second axis hole 532 communicates with the chamber 534 of stepping down, the vertical sectional shape of moving tooth 533 is fan-shaped, the inboard of fan-shaped dual-side constitutes inner ring shifting block thrust face 5331, the outside of fan-shaped dual-side constitutes big roller thrust face 5332, outer ring shifting block 51 places first die cavity 41 of first case 4, first splined hole 521 of drive block 52 by the centre is installed on first spline 531 and is arranged in the central bore 512 of outer ring shifting block 51, little roller 54, return cushion block 55 is installed in the annular chamber that inner periphery surrounded of the excircle of drive block 52 and central bore 512 with being set in distance respectively, and little roller 54 is engaged on the little roller contact surface 5121 of central bore 512, and return cushion block 55 is engaged on the return cushion block contact surface 5122 of central bore 512, and simultaneously little roller 54 cooperates with little roller positioning boss 47 on first case 4 again and realizes locating.Second core 7 of the present invention comprises main shaft 71, inner ring shifting block 72, pad 73, wherein: be formed with first step 711, second spline 712, second step 713, external tooth 714 on the main shaft 71 successively, in the middle of the end of main shaft 71, be provided with tightening screw hole 715 near external tooth 714 1 ends; Pad 73 offers center splined hole 731 in the centre of pad 73 in the form of sheets, and pad 73 is set on second spline 712 of main shaft 71 and pastes with second step 713 and touches by center splined hole 731, and the effect of pad 73 is installations of being convenient to big roller 6; The centre of inner ring shifting block 72 offers second splined hole 721, moving tooth embeded slot 723 has been intervally installed on the excircle, big roller contact surface 722, identical and the vertical sectional shape of the quantity of moving tooth embeded slot 723 and moving tooth 533 matches, inner ring shifting block 72 is installed on second spline 712 of main shaft 71 and places in the chamber 534 of stepping down of dial 53 by second splined hole 721, make moving tooth 533 and moving tooth embeded slot 723 scarf mutually on the dial 53, specifically, be that inner ring shifting block thrust face 5331 parts on the moving tooth 533 are inserted in the moving tooth embeded slot 723, and big roller thrust face 5332 parts on the moving tooth 533 are exposed outside moving tooth embeded slot 723, be convenient to install big roller 6 like this, when big roller 6 is installed, between the big roller thrust face 5332 of adjacent two moving teeth 533, fill full big roller 6 earlier, the moving tooth 533 that will have big roller 6 then inserts in second die cavity 81 of second case 8, like this, big roller 6 is located in big roller thrust face 5332, big roller contact surface 722, the chamber wall of second die cavity 81, in the die cavity that the bottom surface surrounded of pad 73 and dial 53, here need to prove: the mounting structure of above-mentioned big roller 6, can guarantee that the rotation of dial 53 can drive the rotation of inner ring shifting block 72, and the rotation of inner ring shifting block 72 can't drive the rotation of dial 53 conversely, thereby inner ring shifting block 72 has auto-lock function.One end of main shaft 71 inserts in first axis hole 43 of first case 4 after passing second axis hole 532 by first step 711, the other end of main shaft 71 by third axle hole 82 insertings on second step 713 and second case 8 after, external tooth 714 parts are extended to outside second case 8.Fixedly case 8 of the present invention adopts metallic material to be stamped to form, fixing second die cavity 81 on the case 8, third axle hole 82, second rivet hole 84, knock hole 85, lug connecting bore 831 on the 3rd lug 83 and the 3rd lug integrated punching when punching press forms, wherein: second rivet hole 84 is corresponding to first rivet hole 441 of first lug 44 on first case 4, realize fixing between first case 4 and second case 8 by self-plugging rivet 20 between the two, knock hole 85 is corresponding to the case positioning boss 48 on first case 4, inserting by case positioning boss 48 and knock hole 85 realizes the location of first case 4 on second case 8, and the 3rd lug 83 is attached to second case 8 on the seat basin side plate 30 of seat by fastener such as screw etc. by the lug connecting bore of offering on it 831.Sector tooth block 9 of the present invention adopts metallic material to strike out sheet, one end of sector tooth block 9 is provided with the fixed shaft hole 91 that gets on of seat frame 40 that is used for sector tooth block 9 is attached to seat, offer fan-shaped teeth groove 92 in the middle of the other end of sector tooth block 9, at the upper edge of teeth groove 92 Zhou Buyou internal tooth 921, the external tooth 714 of described main shaft 71 probes in the teeth groove 92, and be meshed with internal tooth 921, sector tooth block 9 revolves with the tightening screw hole 715 on the main shaft 71 and joins the connection that realizes with main shaft 71 passing teeth groove 92 backs by a fix screw 10.Return spring 3 of the present invention is positioned at the die cavity that cover cap surrounded of the spanner cavity 25 and first case 4, and be installed on the boss 42 of first case 4, the two ends of return spring 3 are formed with first, second return spring pin 31, first, second return spring pin 31,32 embeds the return support 22 of spanner 2 intersecting the fixing of stranded back mutually on return spring fixing lug boss 45 in the middle of first, second return spring pin 31,32.

Narrate the course of action of seat height adjuster of the present invention below: under normal circumstances, 1) handle end to spanner 2 applies a upward force, spanner 2 is made right-hand revolution by connecting screw 1 together with outer ring shifting block 51, little roller 54 and return cushion block 55 are by the location of the little roller positioning boss 47 of setting on first case 4, simultaneously by of the relative motion of little roller 54 with the little roller contact surface 5121 of outer ring shifting block 51, little roller 54 is rolled, the rolling of little roller 54 contacts with the outer circumference surface of drive block 52 again and produces relative motion, thereby drive drive block 52 rotations, first spline 531 of setting matches on first splined holes 521 that are provided with in the middle of the drive block 52 and the dial 53, thereby drive dial 53 rotations, the rotation of dial 53 pushes away pine with big roller 6 on the one hand, make big roller 6 rotations, directly promote inner ring shifting block 72 on the other hand, make 72 rotations of inner ring shifting block by the moving tooth on the dial 53 533; Because second spline 712 that is provided with on the main shaft 71 matches with second splined hole 721 of setting in the middle of the inner ring shifting block 72, thereby the rotation of inner ring shifting block 72 drives main shaft 71 again rotates together, the internal tooth 921 that is provided with on external tooth 714 and the sector tooth block 9 on the main shaft 71 is meshed, thereby drive sector tooth block 9 opposite spins, seat is raise.When the upward force that sheds on the spanner 2, screen resilience by return spring 3, drive the spanner resilience by first confined planes 221 on the return support 22 of spanner 2, and, can guarantee when spanner 2 returns, can not drive a core rotation because of the change in size of little roller 54 when shifting block 51 inner peripherys in outer ring roll.When spanner 2 upwards lifted maximum, the right side of a pair of position-limited trough 46 of setting contacted on a pair of positive stop lug boss 23 that is provided with on the spanner 2 and first case 4, has guaranteed the angular range that spanner 2 upwards lifts.In addition, big roller 6 is positioned at the die cavity that the bottom surface surrounded of chamber wall, pad 73 and the dial 53 of big roller thrust face 5332, big roller contact surface 722, second die cavity 81, and guarantees the height adjuster reliable lock by the variation of size in its internal motion process.2) handle end to spanner 2 applies a downward force, spanner 2 is done the anticlockwise direction rotation by connecting screw 1 together with outer ring shifting block 51, little roller 54 and return cushion block 55 are by the location of the little roller positioning boss 47 of setting on first case 4, simultaneously by of the relative motion of little roller 54 with the little roller contact surface 5121 of outer ring shifting block 51, little roller 54 is rolled, the rolling of little roller 54 contacts with the outer circumference surface of drive block 52 again and produces relative motion, thereby drive drive block 52 rotations, first spline 531 of setting matches on first splined holes 521 that are provided with in the middle of the drive block 52 and the dial 53, thereby drive dial 53 rotations, the rotation of dial 53 pushes away pine with big roller 6 on the one hand, make big roller 6 rotations, directly promote inner ring shifting block 72 on the other hand, make 72 rotations of inner ring shifting block by the moving tooth on the dial 53 533; Because second spline 712 that is provided with on the main shaft 71 matches with second splined hole 721 of setting in the middle of the inner ring shifting block 72, thereby the rotation of inner ring shifting block 72 drives main shaft 71 again rotates together, the internal tooth 921 that is provided with on external tooth 714 and the sector tooth block 9 on the main shaft 71 is meshed, thereby drive sector tooth block 9 opposite spins, seat is reduced.When the downward force that sheds on the spanner,, drive the spanner resilience by second confined planes 222 on the return support 22 of spanner 2 by the screen resilience of return spring 3.When spanner 2 was adjusted to maximum downwards, the left side of a pair of position-limited trough 46 of setting contacted on a pair of positive stop lug boss 23 that is provided with on the spanner 2 and first case 4, thereby has guaranteed spanner 2 downward pressure-formed angular ranges.

Claims

1. seat height adjuster, it is characterized in that it comprises first case (4) with first die cavity (41), be used for connect and second case (8) that have second die cavity (81) and third axle hole (82) of seat basin side plate (30) with seat, place first respectively, second die cavity (41,81) the primary shaft core (5) between, second core (7), big roller (6), and be used for the sector tooth block (9) that the seat frame (40) with seat connects, return spring (3) with the cover cap outside that lays respectively at first case (4), spanner (2), described first case (4) is fixed on second case (8), the cover cap outside at first case (4) has extended boss (42), return spring fixing lug boss (45), the centre of boss (42) is provided with first axis hole (43), first axis hole (43) communicates with first die cavity (41), extended little roller positioning boss (47) in the cover cap inboard of first case (4), offer a pair of position-limited trough (46) on the cover cap of first case (4), a pair of position-limited trough (46) is distributed in the both sides of return spring fixing lug boss (45); Described primary shaft core (5) comprises outer ring shifting block (51), drive block (52), dial (53), little roller (54), return cushion block (55), described outer ring shifting block (51) is an annular solid, the centre of annular solid is central bore (512), described drive block (52) is a disking body, the centre is provided with first splined hole (521), one side of described dial (53) is provided with first spline (531), be provided with moving tooth (533) between opposite side, the centre of moving tooth (533) is formed with the chamber of stepping down (534), the centre of first spline (531) is provided with second axis hole (532), second axis hole (532) communicates with the chamber of stepping down (534), outer ring shifting block (51) places first die cavity (41) of first case (4), drive block (52) is installed in the central bore (512) that outer ring shifting block (51) were gone up and be arranged in to first spline (531) by first splined hole (521), described little roller (54), return cushion block (55) is filled in the annular chamber that inner periphery surrounded of the excircle of drive block (52) and central bore (512) with being set in distance respectively, and little roller (54) cooperates with little roller positioning boss (47) and realizes the location; Described second core (7) comprises main shaft (71), inner ring shifting block (72), pad (73), be formed with first step (711) on the main shaft (71) successively, second spline (712), second step (713), external tooth (714), in the middle of the end of main shaft (71), be provided with tightening screw hole (715) near external tooth (714) one ends, pad (73) in the form of sheets, second spline (712) that is set in main shaft (71) is gone up and is touched with second step (713) subsides, the centre of inner ring shifting block (72) offers second splined hole (721), moving tooth embeded slot (723) has been intervally installed on the excircle, big roller contact surface (722), inner ring shifting block (72) is gone up and is placed in the chamber of stepping down (534) of dial (53) by second spline (712) that second splined hole (721) is installed in main shaft (71), make on the dial (53) moving tooth (533) respectively with moving tooth embeded slot (723) scarf, moving tooth (533) places second die cavity (81) of second case (8), between adjacent moving tooth (533), be filled with big roller (6), big roller (6) respectively with big roller contact surface (722), and the chamber wall subsides of second die cavity (81) are touched, one end of main shaft (71) inserts in first axis hole (43) of first case (4) after passing second axis hole (532) by first step (711), the other end of main shaft (71) by third axle hole (82) inserting on second step (713) and second case (8) after, external tooth (714) is extended to outside second case (8); On the fixing present frame (40) of one end of described sector tooth block (9), offer fan-shaped teeth groove (92) in the middle of the other end, at the upper edge of teeth groove (92) Zhou Buyou internal tooth (921), the external tooth (714) of described main shaft (71) probes in the teeth groove (92), and be meshed with internal tooth (921), sector tooth block (9) revolves with the tightening screw hole (715) on the main shaft (71) and joins the connection that realizes with main shaft (71) passing teeth groove (92) back by a fix screw (10); Described return spring (3) places on the boss (42) of first case (4), the two ends of return spring (3) are formed with first, second return spring pin (31,32), and first, second return spring pin (31,32) cooperates with return spring fixing lug boss (45) respectively and realizes locating; The centre of described spanner (2) is provided with and is used for the boss mounting hole (21) that confession boss (42) passes through, the upper edge of spanner (2) is provided with and is used to be entrenched in the middle return support (22) that makes the spanner self-return of first, second return spring pin (31,32), also be formed with a pair of positive stop lug boss (23) on the spanner of return support (22) both sides, a pair of positive stop lug boss (23) is fixing with the outer ring shifting block (51) that is positioned at first die cavity (41) in a pair of position-limited trough (46) back of passing on first case (4).

2. seat height adjuster according to claim 1, it is characterized in that between on the case outer of described first case (4), being provided with first lug (44), on first lug (44), offer first rivet hole (441), correspondingly, on the case outer of described second case (8), offer second rivet hole (84), with cooperating of first, second rivet hole (441,84) first case (4) is fixed on second case (8) by self-plugging rivet (20).

3. seat height adjuster according to claim 1, it is characterized in that between going back on the case outer of described first case (4), being provided with case positioning boss (48), correspondingly, be provided with the knock hole (85) that is used for for case positioning boss (48) inserting on the case outer of described second case (8) between also.

4. seat height adjuster according to claim 1, it is characterized in that on the outer of described outer ring shifting block (51), being formed with a pair of second lug (511), on a pair of second lug (511), offer screw hole (5111) respectively, correspondingly, centre at a pair of positive stop lug boss (23) of described spanner (2) offers screw (24), the screw hole (5111) of a pair of connecting screw (1) after passing the middle screw (24) of a pair of positive stop lug boss (23) respectively and on a pair of second lug (511) is rotated with, thereby can realize a pair of positive stop lug boss (23) of spanner (2) and fixing of outer ring shifting block (51).

5. seat height adjuster according to claim 1, it is characterized in that being formed with the return cushion block contact surface (5122) that is used for the little roller contact surface (5121) that cooperates with little roller (54) and is used for cooperating respectively on the inner periphery of central bore (512) of described outer ring shifting block (51), be set in distance between little roller contact surface (5121) and the return cushion block contact surface (5122) with return cushion block (55).

6. seat height adjuster according to claim 1 is characterized in that the centre of described pad (73) offers center splined hole (731), and pad (73) is set on second spline (712) of main shaft (71) by center splined hole (731).

7. seat height adjuster according to claim 1, the vertical sectional shape that it is characterized in that described moving tooth (533) is fan-shaped, the inboard of fan-shaped dual-side constitutes and is used for the inner ring shifting block thrust face (5331) that contacts with moving tooth embeded slot (723), and the outside of fan-shaped dual-side constitutes and is used for the big roller thrust face (5332) that contacts with big roller (6).

8. seat height adjuster according to claim 1 is characterized in that the middle part of described spanner (2) is formed with spanner cavity (25), and return spring (3) is contained in the die cavity that cover cap surrounded of spanner cavity (25) and first case (4).

9. seat height adjuster according to claim 1, it is characterized in that on the case outer of described second case (8), also being formed with a pair of the 3rd lug (83), on a pair of the 3rd lug (83), offer a lug connecting bore (831) that basin side plate (30) gets on that is used for second case (8) is attached to seat.

10. according to claim 1 or 7 described seat height adjusters, it is characterized in that the quantity of described moving tooth embeded slot (723) and moving tooth (533) is identical, vertical sectional shape matches.