CN102849023B - Pretension limiting type retractor - Google Patents
Pretension limiting type retractor Download PDFInfo
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- CN102849023B CN102849023B CN201210315504.3A CN201210315504A CN102849023B CN 102849023 B CN102849023 B CN 102849023B CN 201210315504 A CN201210315504 A CN 201210315504A CN 102849023 B CN102849023 B CN 102849023B
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- pretension
- dead axle
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- pulley
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Abstract
The invention discloses a kind of pretension limiting type retractor, it comprises taking-up device housing, be located at the S. A. being wound around safety strap in this taking-up device housing, this S. A. is installed with by the power-actuated pre-bearing up pulley of pretension, wherein, described S. A. comprises by the spacing dead axle be connected in one of insurance salient point and the moving axis being wound around safety strap, a limiter part is also connected with between this moving axis and dead axle, described dead axle end face has telescopic ratchet, described taking-up device housing has ratchet in setting corresponding with ratchet.Being taken turns by pretension drives S. A. to realize pretension action towards the motion of safety strap backrush direction, after this, safety strap drives the counter motion of limiter rotary components, when force value is excessive, insurance salient point is cut off, force-limit rod is out of shape, by ratchet by stuck for dead axle on interior ratchet, make moving axis be realized limiter action by rigidity is locked.Compact conformation of the present invention, matching requirements are low, and apparatus for production line is simple, and reliability is high, and maintainable strong, low cost of manufacture, production efficiency is high.
Description
Technical field
The present invention relates to the rotary tightening device of safety strap, be specifically related to a kind of pretension limiting type retractor.
Background technology
In the moment that automobile collides, wear and promptly to circle round pretension at the safety strap of human body, reducing that human body causes because of various factors and between safety strap slack (as worn foaming kind clothes), people being withdrawn into firmly the ideal position on seat before collision peak value arrives.When after pretension release, collision peak value arrives, and now safety strap will be subject to very large collision impact, and if do not limited force value on this safety strap, human body may be larger by the injury possibility being subject to safety strap.
Therefore, be necessary to improve existing automobile safety belt retractor, to reach the effect of the safety of protection occupant.
Summary of the invention
For above-mentioned weak point of the prior art, the present invention aims to provide a kind of pretension limiting type retractor, provides pretension power by deflagration type firmly beforehand means, limits even force value in force-limit rod mode, advantageously avoids collision peak value, ensures the safety of occupant.
In order to arrive above-mentioned purpose, technical scheme of the present invention: a kind of pretension limiting type retractor, comprise taking-up device housing, be located at the S. A. being wound around safety strap in this taking-up device housing, this S. A. is installed with by the power-actuated pre-bearing up pulley of pretension, wherein, described S. A. comprises by the spacing dead axle be connected in one of insurance salient point and the moving axis being wound around described safety strap, a limiter part is also connected with between this moving axis and described dead axle, described dead axle end face has telescopic ratchet, described taking-up device housing has ratchet in setting corresponding with described ratchet.
Further preferred, described limiter part is one have the d-axis of same axis with described moving axis, dead axle, and described limiter part two ends are all connected by spline and described moving axis, dead axle.
Pillow block is arranged in described dead axle one end, described dead axle by this pillow block and described moving axis sheathed, between the pillow block and described moving axis of described dead axle, be provided with limiter lining.
Described predetermincd tension is that some pretension hoodles drive, and described pretension wheel periphery has the corresponding convolution die cavity of some and described pretension hoodle, the pretension hoodle of movement rotates by matching with this convolution die cavity and ordering about this pre-bearing up pulley.
Described pretension hoodle to be located in a sleeve pipe and free-running fit with it, and this sleeve pipe one end is provided with gas generator, and this gas generator is by a truncated cone stage clip and described pretension hoodle abutting contact; The described sleeve pipe other end mouth of pipe is tangent with described pre-bearing up pulley and corresponding with the convolution die cavity on it, this end mouth of pipe has an occluder adjacent with described pretension hoodle, is provided with limiting card between described occluder and described sleeve pipe.
The pretension direction of described pre-bearing up pulley is in the tangent anterior position of described sleeve pipe there is a collecting hood, cover mouth and the described pre-bearing up pulley of this collecting hood are tangent, its tangential direction is contrary with described sleeve pipe tangential direction, is provided with one against catch at the sleeve port place of this collecting hood.
The position that described pre-bearing up pulley pretension direction is in described collecting hood front has a ball stopper card.
The profile of described occluder is the conjuncted of two pretension hoodles.
Described force-limit rod is made up of plastic material.
Described pretension action, namely be that gas generator receives collision alarm, there is instantaneous explosion and produce high pressure gas, high pressure gas act on pretension hoodle, this pretension hoodle will move, make the occluder of cannula tip be subject to pretension hoodle to promote, the limiting card be fixed between occluder and sleeve pipe breaks instantaneously, then, occluder, pretension hoodle will enter the convolution die cavity of pre-bearing up pulley successively, and drive pre-bearing up pulley to start convolution, work as occluder, pretension hoodle leaves the convolution die cavity of pre-bearing up pulley successively and enters collecting hood, when that is to say that moving axis starts counter motion, i.e. pretension release, S. A. enters the action of safety strap pull-out direction lock in emergency, after locking completes, force limiting device starts effect, ensure that S. A. is stressed in given area internal strain.
When safety strap is subject to impacting, the ratchet be fixed on dead axle stretches out along set track, on the interior ratchet that whole dead axle is stuck on described taking-up device housing.The insurance salient point fixing moving axis and dead axle when impacting larger will be cut off, and the limiter part now by connecting dead axle and dead axle starts to be out of shape, and namely starts to realize limiter action.At this moment, the deforming torsional of limiter part plays absoluteness effect to belt tensioning power, can ensure to change in the deforming torsional that safety strap rotates stressed i.e. limiter part in given area, thus ensures occupant safety.
Beneficial effect of the present invention: the S. A. being wound around safety strap is made up of moving axis and dead axle two parts, and between moving axis and dead axle, insert the limiter part that possesses good plastic deformation, when the force value that safety strap is subject to exceedes the torsional deflection value of this limiter part, limiter part starts distortion, tension force now on safety strap change with limiter part moment after force value consistent, like this, the specification of different limiter part can be changed according to different technical requirementss, make this product can reach good pretension limiter effect; This device major part part all can adopt mould to complete production, and effectively control manufacturing cost, production efficiency is high, is beneficial to the demand that modern manufacturing is produced in time, shortens life cycle of the product; In addition, this product with compact structure, matching requirements are low, and apparatus for production line is simple, and reliability is high, maintainable strong.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the cutaway view along A-A line in Fig. 1;
Fig. 3 is the structural representation that in the present invention, pretension action removes Decanning;
Fig. 4 is the backsight structural representation of Fig. 3;
Fig. 5 is the perspective view of pretension action removing end cap in the present invention.
Detailed description of the invention
The present invention is further described below in conjunction with specific embodiment and accompanying drawing.
Participate in Fig. 1 to Fig. 5, described pretension limiting type retractor comprises taking-up device housing 1, be located at the S. A. 20 being wound around safety strap in this taking-up device housing 1, this S. A. 20 is installed with by the power-actuated pre-bearing up pulley 5 of pretension, wherein, described S. A. 20 comprises by the spacing dead axle 13 be connected in one of insurance salient point 21 and the moving axis 17 being wound around described safety strap, a limiter part 15 is also connected with between this moving axis 17 and described dead axle 13, described dead axle 13 end face has telescopic ratchet 12, described taking-up device housing 1 has and ratchet 19 in the corresponding setting of described ratchet 12.
S. A. 20 in the present invention is combined to form primarily of moving axis 17 and dead axle 13, and wherein, described moving axis 17 excircle is wound around safety strap.Described moving axis 17 and dead axle 13 rely on spacing be connected radial with this moving axis 17 integrated insurance salient point 21 circumference, and the free end of this moving axis 17 and dead axle 13 is movably arranged on described taking-up device housing 1 respectively.Between described moving axis 17 and dead axle 13, preferred described dead axle 13 is arranged to pillow block 31 near the end of described moving axis 17 end, described dead axle 13 is sheathed with described moving axis 17 by this pillow block 31, after limiter action starts, larger radial pressure will be there is between described moving axis 17 and dead axle 13, in order to reduce, friction between it is excessive causes adverse effect, between the pillow block 31 and described moving axis 17 of described dead axle 13, be provided with limiter lining 16.
Limiter part 15 is also connected with between described moving axis 17 and dead axle 13, this limiter part 15 be preferably made up of the plastic material with good plastic deformation ability and with described moving axis 17, dead axle 13 has the d-axis of same axis, spline 18 is provided with at these limiter part 15 both ends, described limiter part 15 by the spline 18 at its two ends respectively with described moving axis 17, dead axle 13 is connected, be embodied in, at described moving axis 17, there is in dead axle 13 groove of the mating shapes formed with described limiter part 15 two ends spline 18, be fixedly connected with described limiter part 15 two ends by this groove.
Safety strap S. A. 20 is driven to run towards safety strap backrush direction by pretension convolution assembly, after this safety strap drives limiter rotary components to start counter motion, i.e. limiter action of the present invention, it is work like this, when safety strap is subject to impacting, the ratchet 12 be fixed on described dead axle 13 stretches out along set track, this dead axle 13 radial direction to be fixedly stuck on described taking-up device housing 1 on ratchet 19.When impacting larger, the insurance salient point 21 of fixing described moving axis 17 and described dead axle 13 will be cut off.At this moment, the limiter part 15 being connected moving axis 17 and dead axle 13 by spline 18 starts distortion, described moving axis 17 starts relative rotation with dead axle 13, the now winding radius of the deforming torsional X safety strap of belt tensioning power=limiter part 15, so now the deforming torsional of limiter part 15 plays absoluteness effect to belt tensioning power.
The invention still further relates to lock assembly, wind spring assembly etc., it belongs to prior art, does not repeat them here.
As for pretension room structure, described S. A. 20 sets firmly pre-bearing up pulley 5 away from one end of dead axle 13, drive driven subassembly to circle round by this pre-bearing up pulley 5 of drive force, drive the S. A. 20 being wound around safety strap to run towards safety strap backrush direction.Described predetermincd tension is driven by some pretension hoodles 7.
Particularly, the wheel periphery of described pre-bearing up pulley 5 has the corresponding convolution die cavity 10 of some and described pretension hoodle 7, the pretension hoodle 7 of movement is by matching the incompatible rotation ordering about described pre-bearing up pulley 5 with this convolution die cavity 10.Aforementioned some pretension hoodles 7 are located in a sleeve pipe 6, and described pretension hoodle 7 and described sleeve pipe 6 free-running fit, tangent and corresponding with the convolution die cavity 10 on it with described pre-bearing up pulley 5 at one end mouth of pipe of this sleeve pipe 6, when namely rolling out along the pretension hoodle 7 of sleeve pipe 6 track movement from this end mouth of pipe of sleeve pipe 6, described convolution die cavity 10 can be entered, driven the rotation of described pre-bearing up pulley 5 by the pretension hoodle 7 of continuous moving; The other end of described sleeve pipe 6 is provided with gas generator 9, this gas generator 9 Receiving collision signal, moment detonation produces high pressure gas, is the driving source of pretension convolution.Described gas generator 9 is by a truncated cone stage clip 8 and described pretension hoodle 7 abutting contact, and this truncated cone stage clip 8 is between described gas generator 9 and pretension hoodle 7, can prevent each pretension hoodle 7 in sleeve pipe 6 from shaking when not working and abnormal sound occurs.Preferably, a pretension hoodle 7 adjacent with described truncated cone stage clip 8 is a deformable piston ball, same and sleeve pipe 6 free-running fit of this piston ball, it accepts the high pressure gas effect that formed by gas generator 9 and produces Light deformation to fill up and gap between described sleeve pipe 6 inwall, ensure high pressure gas potential energy not pop-off, also can be used as power and displacement simultaneously and transmit entity and enter convolution die cavity 10 and drive pre-bearing up pulley 5 to move.And described pretension hoodle 7 enters convolution die cavity 10 by piston ball effect generation displacement, drive the motion of pre-bearing up pulley 5.The port that pretension hoodle 7 enters described pre-bearing up pulley 5 in sleeve pipe 6 is provided with a profile by the conjuncted occluder 4 formed of two pretension hoodles 7, this occluder 4 is adjacent with described pretension hoodle, stop when pretension assembly does not work described pretension hoodle 7 to overflow described sleeve pipe 6, simultaneously also can enter described convolution die cavity 10 as a part for power and displacement and drive pre-bearing up pulley 5 to move.Between this occluder 4 and described sleeve pipe 6, be provided with limiting card 3, this limiting card 3 Main Function fixes described occluder 4, and when gas generator 9 produces detonation, this limiting card 3 will be subject to comparatively great force value and producing and break.
The pretension direction of described pre-bearing up pulley 5 is in the tangent anterior position of described sleeve pipe 6 there is a collecting hood 14, cover mouth and the described pre-bearing up pulley 5 of this collecting hood 14 are tangent, its tangential direction is contrary with described sleeve pipe 6 tangential direction, is provided with one against catch 2 at the sleeve port place of this collecting hood 14.Described collecting hood 14 is for from the occluder 4 in sleeve pipe 6, pretension hoodle 7(, piston ball) enter the convolution die cavity 10 of pre-bearing up pulley 5 after, when entering into after potential energy terminates in this collecting hood 14.And described inverse catch 2 is mainly in order to the occluder 4 in collecting hood described in entry deterrence 14, pretension hoodle 7(, piston ball) reenter in the convolution die cavity 10 of described pre-bearing up pulley 5, the clamping stagnation of S. A. 20 after prevention pretension.
Described pre-bearing up pulley 5 pretension direction is on position that described collecting hood 14 front is not more than convolution die cavity 10 distance and there is a ball stopper card 11, this ball stopper card 11 can limit described occluder 4, pretension hoodle 7(, piston ball) sense of motion, described collecting hood 14 can be entered smoothly, occluder 4 after avoiding potential energy to terminate, pretension hoodle 7(, piston ball) be trapped in pre-bearing up pulley 5 convolution die cavity 10 in cause moving axis motion clamping stagnation, meanwhile, the assembling that this ball stopper card 11 also can be described sleeve pipe 6 provides pre-determined bit.
Pretension convolution action of the present invention is work like this, by gas generator 14 Receiving collision signal, there is moment detonation and produce high pressure gas, high pressure gas effect acts on pretension hoodle 7 by truncated cone stage clip 8, promote this pretension hoodle 7 to move, simultaneously, described occluder 4 is subject to the promotion of pretension hoodle 7, the limiting card 3 be fixed between occluder 4 and described sleeve pipe 6 breaks instantaneously, then described occluder 4, pretension hoodle 7 enters in the convolution die cavity 10 of described pre-bearing up pulley 5 successively, and then described pre-bearing up pulley 5 rotates, circle round by pre-bearing up pulley 5 drives its driven subassembly, when occluder 4, pretension hoodle 7 leaves the convolution die cavity 10 of described pre-bearing up pulley 5 successively and enters reserved collecting hood 14, pretension release.Slewing arrangement enters the action of safety strap pull-out direction lock in emergency, and after locking completes, force limiting device can start effect, ensures that slewing arrangement is stressed and changes in given area.
Above the technical scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and embodiment, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, detailed description of the invention and field of application all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. a pretension limiting type retractor, comprise taking-up device housing, be located at the S. A. being wound around safety strap in this taking-up device housing, this S. A. is installed with by the power-actuated pre-bearing up pulley of pretension, described S. A. comprises by the spacing dead axle be connected in one of insurance salient point and the moving axis being wound around described safety strap, a limiter part is also connected with between this moving axis and described dead axle, described dead axle end face has telescopic ratchet, described taking-up device housing has ratchet in setting corresponding with described ratchet, it is characterized in that: described limiter part be one with described moving axis, dead axle has the d-axis of same axis, described limiter part two ends are all by spline and described moving axis, dead axle is connected, pillow block is arranged in described dead axle one end, described dead axle by this pillow block and described moving axis sheathed, limiter lining is provided with between the pillow block and described moving axis of described dead axle, described predetermincd tension is that some pretension hoodles drive, described pretension wheel periphery has the corresponding convolution die cavity of some and described pretension hoodle, the pretension hoodle of movement rotates by matching with this convolution die cavity and ordering about this pre-bearing up pulley, described pretension hoodle to be located in a sleeve pipe and free-running fit with it, this sleeve pipe one end is provided with gas generator, this gas generator is by a truncated cone stage clip and described pretension hoodle abutting contact, the pretension direction of described pre-bearing up pulley is in the tangent anterior position of described sleeve pipe there is a collecting hood, cover mouth and the described pre-bearing up pulley of this collecting hood are tangent, its tangential direction is contrary with described sleeve pipe tangential direction, be provided with one against catch at the sleeve port place of this collecting hood, the position that described pre-bearing up pulley pretension direction is in described collecting hood front has a ball stopper card, the described sleeve pipe other end mouth of pipe is tangent with described pre-bearing up pulley and corresponding with the convolution die cavity on it, this end mouth of pipe has an occluder adjacent with described pretension hoodle, is provided with limiting card between described occluder and described sleeve pipe.
2. pretension limiting type retractor according to claim 1, is characterized in that: the profile of described occluder is the conjuncted of two pretension hoodles.
3. pretension limiting type retractor according to claim 1, is characterized in that: described limiter part is made up of plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210315504.3A CN102849023B (en) | 2012-08-30 | 2012-08-30 | Pretension limiting type retractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210315504.3A CN102849023B (en) | 2012-08-30 | 2012-08-30 | Pretension limiting type retractor |
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| Publication Number | Publication Date |
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| CN102849023A CN102849023A (en) | 2013-01-02 |
| CN102849023B true CN102849023B (en) | 2016-02-24 |
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| CN201210315504.3A Active CN102849023B (en) | 2012-08-30 | 2012-08-30 | Pretension limiting type retractor |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226061A (en) * | 2016-03-23 | 2017-10-03 | 天合汽车科技（上海）有限公司 | Webbing retractor with force limiting device and the vehicle with Webbing retractor |
| DE102017221028B4 (en) * | 2017-11-24 | 2021-02-11 | Autoliv Development Ab | BELT TENSIONER WITH A MASS BODY DRIVE |
| CN109353306B (en) * | 2018-12-06 | 2023-12-22 | 湖北科技学院 | Automobile equipped with safety belt with buffering function |
| CN110329205B (en) * | 2019-07-17 | 2020-10-09 | 重庆光大产业有限公司 | Coiler capable of fixing bent pipe in all directions |
| CN114655157B (en) * | 2020-12-23 | 2024-04-12 | 延锋汽车智能安全系统有限责任公司 | Seatbelt retractor and stopper for seatbelt retractor |
| CN113183914B (en) * | 2021-04-06 | 2022-04-01 | 重庆光大产业有限公司 | Reliable coiler is steady and just terminates to limit for force |
| CN112977327B (en) * | 2021-04-06 | 2022-04-01 | 重庆光大产业有限公司 | Force value is stable and controllable coiler of limit force termination start time |
| CN115179895B (en) * | 2021-04-07 | 2023-08-29 | 延锋汽车智能安全系统有限责任公司 | Seat belt pretensioner driving device and seat belt retractor |
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| DE19927427C2 (en) * | 1999-06-16 | 2002-11-14 | Autoliv Dev | Belt retractor with switchable force limiter |
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| JP5411667B2 (en) * | 2009-11-20 | 2014-02-12 | オートリブ ディベロップメント エービー | Seat belt retractor |
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| US5690295A (en) * | 1995-08-02 | 1997-11-25 | Autoliv Development Ab | Mass body drive for a rotational tensioning device |
| CN201205903Y (en) * | 2008-01-17 | 2009-03-11 | 李小林 | Prefastening car safety belt coiler |
| CN102271974A (en) * | 2009-01-20 | 2011-12-07 | 奥托立夫开发公司 | Seatbelt retractor |
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| CN102849023A (en) | 2013-01-02 |
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