CN102837665B - Spool, end cap, Webbing retractor and safety strap assembly - Google Patents
Spool, end cap, Webbing retractor and safety strap assembly Download PDFInfo
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- CN102837665B CN102837665B CN201210309320.6A CN201210309320A CN102837665B CN 102837665 B CN102837665 B CN 102837665B CN 201210309320 A CN201210309320 A CN 201210309320A CN 102837665 B CN102837665 B CN 102837665B
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Abstract
The invention provides a kind of spool, be applied to the taking-up device of safety strap; Described spool comprises and axis is provided with through hole and mandrel for being wound around ribbon, and separable and be arranged at two end caps at mandrel two ends respectively; End cap is oblate bar shape; Each end cap is circumferentially provided with the external tooth that to match with the internal tooth profile of tooth of described retractor frame sidewall, and the central pit hole of band internal tooth is set towards the center of the inner end surface of mandrel, the external tooth profile of tooth of the internal tooth profile of tooth of a described central pit hole and described torsion bar wherein end matches; The middle section position of the through hole of position, mandrel axis is provided with the internal tooth matched with external tooth in the middle part of described torsion bar.This spool holds the shorter torsion bar of length, and torsion bar is not easily occured bending and deformation, and overall force-bearing situation is simplified, safer stable.The present invention is provided for the end cap of said reel simultaneously, and uses Webbing retractor, the safety strap assembly of said reel.
Description
Technical field
The present invention relates to safety strap technology, be specifically related to a kind of spool of the taking-up device for safety strap.The present invention relates to a kind of end cap for this spool, the Webbing retractor using described spool and safety strap assembly simultaneously.
Background technology
Safety strap is the important passive security parts be applied on automobile.When collision happens, safety strap can protect user, make its from or alleviate collision time secondary injury.
The standard body-restraining seat belt be applied on automotive seat be designed at first, it only comprises lockable mechanism and the ribbon for regular user's (human body).When collision happens, lockable mechanism locking, ribbon no longer stretches out, thus user is bundled on automotive seat.But due to impact moment velocity variations very fast, it is very short that speed at time of impact change the momentum change time caused, and makes ribbon act on user's power with it very greatly, such as, can reach 8-10kN.User's rib can be caused to fracture even more serious injury.
Based on above-mentioned reason; standard model safety strap is improved further; propose limit type safety strap; namely in impact moment; the power on human body can be acted on by certain forcelimiting mechanism restriction ribbon; human body can not be caused to be subject to the injury of ribbon itself, to reach the object protecting user to greatest extent.
Be in the European patent document of EP1607288B1 at document number, disclose a kind of safety device for limit type safety strap.Concrete, in the second embodiment of described European patent document, disclosed safety device comprises a U-shaped framework, spool and torsion bar.On the relative two side of described U-shaped framework, be provided with the circular port of band internal tooth.Spool comprises the mandrel for being wound around ribbon and is arranged at the separate end cap at mandrel two ends.Described end cap is provided with the external tooth matched with internal tooth on framework; Rotatable the floating of described spool is arranged on described U-shaped framework, and two end cap is arranged in the circular port of described U-shaped framework respectively, in normal state, the external tooth on end cap does not engage with the internal tooth of described circular port, spool can rotate in described circular port, to be wound around ribbon or release ribbon.
Described torsion bar is shaft-like, is arranged among spool along described reel axis, and is connected by interior external tooth engagement system along axis centre position at described spool; In addition, described torsion bar two ends through described two end cap center, to be stretched out outside end cap and to be meshed with the internal tooth in two end cap by external tooth.
Above-mentioned limit type erecting device working process is as follows: when colliding, sensing device triggers the actuating mechanism comprising gas generator, external tooth on the end cap of spool is meshed with the internal tooth of U-shaped framework, spool is become lockup state from rotatable quick condition (also can be described as free state).The ribbon be wrapped on spool is no longer outwards discharged.Thus user is fixed on seat.In the process, the power moved forward that user produces due to inertia that what ribbon bore come from can be bigger and bigger, and this power is always rotated at the mandrel attempting to draw spool.But mandrel is by the torsion bar be engaged with, the end cap engaged with torsion bar and be fixed on U-shaped framework and cannot rotate.When the tractive force of ribbon can make enough greatly torsion bar produce distortion rotation, the rotation of certain angle will be there is in mandrel, thus make ribbon can be released a segment length, and then make user can produce forward certain displacement, alleviate ribbon and act on user's pulling force with it, reach the effect that restriction ribbon acts on user's power with it, obtain limiter effect.
The key character of above-mentioned patent is, torsion bar two ends are fixed, and stage casing is by interior external tooth engagement mandrel, torsional deflection is made to be evenly distributed on whole torsion bar, prevent stress raisers and rupture, and the material of torsion bar can be made full use of, producing the limiter effect of stable and consistent.In addition, torsion bar deformation process is symmetrical, and make retractor frame stress balance, the torsional deflection of framework is little.
About the detailed content of the limit type erecting device of above-mentioned patent documentation, can further referring to above-mentioned European patent document.
But the both ends that torsion bar stretches out the end cap of spool are also subject to the constrained force from other structures, make whole torsion bar stressed complicated, easily produce stress raisers and fracture failure.Because torsion bar stressing conditions and its have larger relation in the extension of torsional direction, the limit type safety device disclosed in described European patent can produce the complicated problem of torsion bar spreading condition, makes this device be difficult to comparatively accurately control limiter value.Thus, be necessary to make improvement to above-mentioned winder structure.
Summary of the invention
The invention provides a kind of retractor spool for safety strap, to solve the above-mentioned problem of existing Webbing retractor.The present invention is provided for the end cap of this spool in addition, and uses Webbing retractor and the safety strap assembly of described spool.
The invention provides a kind of spool, be applied to the taking-up device of safety strap, this taking-up device comprises retractor frame, torsion bar and described spool; Described retractor frame comprises two relative sidewalls; The circular port of band internal tooth is provided with at described two side opposite position; Torsion bar is shaft-like, all arranges the external tooth of circumference at its both ends and middle part; Described spool comprises and axis is provided with through hole and mandrel for being wound around ribbon, and separable and be arranged at two end caps at mandrel two ends respectively; Described end cap is oblate bar shape; Each end cap is circumferentially provided with the external tooth that to match with the internal tooth profile of tooth of described retractor frame sidewall, and the central pit hole of band internal tooth is set towards the center of the inner end surface of mandrel, the external tooth profile of tooth of the internal tooth profile of tooth of a described central pit hole and described torsion bar wherein end matches; The middle section position of the through hole of position, described mandrel axis is provided with the internal tooth matched with external tooth in the middle part of described torsion bar.
Preferably, in mandrel both sides, every side at least arranges two force limit pins; This force limit pin is fixed on the end face of described mandrel, and insertion end covers should the pin-and-hole that arranges of force limit pin position, or this force limit pin is fixed on described end cap, and inserts on end face of mandrel should the pin-and-hole that arranges of force limit pin position.
Preferably, the two force limit pin setting positions at described mandrel two ends stagger fixing angle in the circumferential.
Preferably, the center, end face side towards mandrel of described end cap is provided with boss, and described central pit hole is arranged on described boss; What be provided with the described boss of accommodation in the relevant position, end face side of described mandrel dodges space.
Preferably, in described two end cap, in the central pit hole of one of them end cap, be provided with mistake proofing hypodontia.
Preferably, in described two end caps, wherein an end cap end face outside is provided with the projecting shaft matched with wind spring, and another end cap end face outside is provided with the projecting shaft coordinated with end instr.
Preferably, be provided with annular boss in the outer, inner side of each end cap described, be provided with in described mandrel both ends of the surface and described annular boss relevant position and dodge seam.
The present invention provides a kind of end cap simultaneously, and wrapping described end cap is flat cylindrical, arranges the central pit hole of band internal tooth in the center of one end side; The whole circle of circumference along described end cap is provided with external tooth.
Preferably, the end face side arranging central pit hole of described end cap is provided with at least two outwardly directed pins.
Preferably, in the contrary center, end face side arranging central pit hole of described end cap, outwardly directed and integrated with this end cap projecting shaft is provided with.
The present invention provides a kind of Webbing retractor simultaneously, and this Webbing retractor uses the spool described in above-mentioned any one technical scheme.
The present invention provides a kind of safety strap assembly simultaneously, and this safety strap assembly uses above-mentioned Webbing retractor.
Compared with prior art, spool provided by the invention has the following advantages: the two ends of the torsion bar of taking-up device are arranged at the two end cap place of spool, and do not pass end cap, relative to background technology, are applied to the torsion bar contraction in length of this spool; The part that background technology extends, the projecting shaft be arranged at outside end cap replaced.When colliding, ribbon drives described mandrel to rotate, and drives torsion bar to rotate by the internal tooth in stage casing; And two end cap is locked on framework, two end cap engages the both ends of torsion bar simultaneously, and the both ends of torsion bar cannot be rotated.Therefore torsion bar central rotational, and both ends are not rotated, and make it bear twisting resistance, when this twisting resistance is enough large, this torsion bar can twist deformation, thus makes the rotation of mandrel generation certain angle, release portion ribbon, the strength that ribbon acts on safety strap user health is minimized.The spool that the present invention adopts is for holding length compared with the shorter torsion bar in background technology, and torsion bar does not stretch out outside spool end cap vertically, this makes torsion bar not easily occur bending and deformation, and do not retrain by other coming from outside the end cap of both sides, the overall force-bearing situation of torsion bar is simplified, and safety strap use procedure is safer stable.Torsion bar not easily occurs bending and deformation, and the relative angle between mandrel and end cap can be made to be maintained, and can not cause the localized metallic friction between mandrel and end cap and gummed.
In a preferred embodiment of the invention, relative to background technology, structure in seam corresponding to boss insertion mandrel is set inside end cap of the present invention, ribbon tractive force can be born and be delivered on framework, torsion bar can be avoided further to bear ribbon tractive force and occur bending and deformation; The boss of the both sides end cap of this Webbing retractor and the seam at mandrel two ends are arranged, ribbon tractive force is delivered on framework, ensure that torsion bar only bears and come from the twist moment of mandrel and the reaction torque of end cap, force-bearing situation is simple and controlled, more consistent limiter effect can be obtained, in use safer stable.
In another preferred implementation of the present invention, also between the mandrel and end cap of taking-up device, be provided with force limit pin, this force limit pin ruptures when the pulling force that mandrel bears is greater than a predetermined value.Before fracture, mandrel transmits torsion by force limit pin to end cap; After force limit pin fracture, just transmit torsion by torsion bar to end cap.The limiter value that fracture occurs due to force limit pin is more constant, enables this structure obtain stable limiter effect.
Accompanying drawing explanation
Fig. 1 to coordinate the structural representation of the taking-up device formed for retractor frame with spool;
Fig. 2 is the schematic diagram of the spool embodiment for Webbing retractor of the present invention;
Fig. 3 is the cutaway view of Fig. 2 along spool axis;
Fig. 4 is the exploded view of reel unit and torsion bar assembling;
Fig. 5 is the schematic diagram of a kind of torsion bar that the spool of the present invention and described embodiment is used in combination;
The end profile of tooth for the torsion bar left end shown in Fig. 5 shown in Fig. 6;
Fig. 7 shows the cooperation figure that torsion bar left end inserts the shrinkage pool of left side end cap;
Fig. 8 is the end profile of tooth of the torsion bar right-hand end shown in Fig. 5;
Fig. 9 shows the cooperation figure that torsion bar right-hand end inserts the shrinkage pool of right side end cap
Figure 10 is the schematic diagram that middle part external tooth has that in the torsion bar insertion mandrel of hypodontia mouth, its outer toothed portion matches with mandrel through hole;
Figure 11 and Figure 12 respectively illustrates block diagram and the section-drawing of torsion bar;
Figure 13 is the schematic diagram of the another kind of torsion bar that the spool of the present invention and described embodiment is used in combination;
Figure 14 be two sectional type diameter for torsion bar identical time and other parts of spool be assembled into one time generalized section;
Generalized section when Figure 15 is two sectional type diameter for torsion bar difference and when other parts of spool are assembled into integrally.
Detailed description of the invention
Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
Please refer to Fig. 2, Fig. 3 and Fig. 4, wherein, Fig. 2 is the schematic diagram of the spool embodiment for Webbing retractor of the present invention.Fig. 3 is the cutaway view of Fig. 2 along spool axis; Fig. 4 is the exploded view of spool and torsion bar assembling.
Described spool 2 comprises mandrel 2-1 and the separable end cap being arranged at described mandrel 2-1 two ends: left side end cap 2-2a and right side end cap 2-2b.Described mandrel 2-1 is for being wound around belt-strap, and it can rotate along its axis the ribbon release maybe will be wound around thereon by braided strap winding.Described mandrel 2-1 is provided with through hole 2-3 along its axis, and through hole 2-3 inwall is provided with internal tooth.
The both ends of the surface of described mandrel 2-1 are provided with two outwardly directed pin 2-6 respectively, are called force limit pin 2-6.
Described mandrel 2-1 is also provided with for passing and fixing the prolate type hold down groove 2-4 of ribbon end and the lightening grooves 2-5 for loss of weight.
The periphery of described two end cap is provided with external tooth, as shown in Figure 4, end cap 2-2a periphery, left side arranges external tooth 2-2a-1, in the periphery of right side end cap 2-2b, external toothing 2-2b-1 is set, and the tooth in described two end cap is unidirectional tooth, mandrel 2-1 rotation direction when discharging towards ribbon, the external tooth of described two end cap periphery matches with the internal tooth section of two through hole on described framework 1.
Corresponding to the position of described force limit pin on the end face of described two end cap towards mandrel 2-1, be also provided with pin-and-hole, the pin-and-hole 2-2b-2 as shown in Figure 4 on the end cap 2-2b of right side.When two end cap mode is as shown in Figure 2 arranged at described mandrel 2-1 both ends of the surface side, force limit pin inserts in corresponding pin-and-hole.In addition, also force limit pin can be arranged at inside end cap, and pin-and-hole is set in mandrel 2-1 end face relevant position.This force limit pin 2-6 is mainly used in bearing shearing force when mandrel rotates, and ruptures more than during a threshold value in this shearing force.The setting position of described force limit pin at mandrel two ends staggers fixing angle in the circumferential, be used in whereby when end cap and mandrel 2-1 assemble and locate, prevent left and right end cap loading error, and the end cap external tooth of both ends of the surface also can be made to stagger certain angle, to meet the actual condition slightly tilted when taking-up device is in lockup state, under guaranteeing lockup state, end cap external tooth can both engage with framework internally toothed annulus.
The central pit hole (hereinafter referred to as shrinkage pool) of band internal tooth is also provided with towards the end face center of mandrel 2-1, the shrinkage pool 2-2b-3 as shown in Figure 4 on the end cap 2-2b of right side in described two end cap.In the present embodiment, the shrinkage pool of two end cap be arranged at stretch out its end face side, place boss on.Corresponding end face of mandrel then arranges the seam holding this boss.
In end face outside (namely away from the end face of the mandrel 2-1) side of described two end cap, the center along this end face is provided with outwardly directed projecting shaft (this projecting shaft can be one-body molded with described end cap).Right side projecting shaft 2-2b-5 as shown in Figure 1 and as shown in Figure 4 left side projecting shaft 2-2a-5.Wherein, left side projecting shaft 2-2a-5 is connected with end instr, and projecting shaft 2-2b-5 periphery, right side is provided with tooth, is connected with wind spring.
Through hole 2-3 on described mandrel 2-1 forms the torsion bar 3 of belt reel device for holding, further illustrate the spool of the present embodiment below in conjunction with the matching relationship with torsion bar 3.But the torsion bar 3 described in the present embodiment is not a part for the spool described in the present embodiment.
Torsion bar 3 as shown in Figure 4, in shaft-like, is circumferentially provided with external tooth at its two ends and middle part.
Torsion bar 3 and described spool 2 structure are as shown in Fig. 2,3 and 4, and torsion bar 3 is inserted through among the through hole 2-3 of described mandrel 2-1, and the external tooth at its axial middle part is meshed with the internal tooth that the through hole 2-3 inwall of described mandrel 2-1 is arranged.Left side end cap 2-2a and right side end cap 2-2b is covered in the both ends of mandrel 2-1 respectively from the left and right sides, and the force limit pin of relevant position is corresponding with pin-and-hole.The two ends of described torsion bar 3 are inserted among the shrinkage pool of described left and right end cap respectively, and its end external tooth is meshed with the internal tooth of corresponding shrinkage pool.In the present embodiment, as shown in Figure 4, between the boss and the seam of mandrel 2-1 of described two end cap, wear ring 4b is also provided with.This wear ring 4b generally adopts low-friction plastic to make, transition can be provided for the seam position coordinated between end cap 2-2 and the opposing end surface of mandrel 2-1, the metal covering of seam position directly can not be contacted, avoid the impact that gummed effect that the mutual friction of metal covering phase causes normally works on torsion bar.
As shown in Figure 4, inside end cap, outer is provided with annular boss (the annular boss 2-2b-6 that the right-hand end shown in Fig. 4 covers), be provided with in the end face relevant position of described mandrel 2-1 match with annular boss dodge seam; By arranging annular boss and dodging fixing structure, frictional area when mandrel 2-1 end face is relative with end cap to be rotated can be reduced, thus reduce the friction force between mandrel and end cap, improve the stability of limiter effect.
Spool described in the present embodiment when being applied to taking-up device, also need with retractor frame with the use of, the spool of matching relationship to the present embodiment below in conjunction with the spool of retractor frame and the present embodiment is described further.
Please refer to Fig. 1, it is retractor frame coordinates the taking-up device formed structural representation with spool.Described retractor frame 1 is U-shaped, and it comprises two relative sidewalls: the first side wall 1-1 and the second sidewall 1-2.Also comprise the 3rd wall 1-4 of the described the first side wall 1-1 of two connections and the second sidewall 1-2.On described the first side wall 1-1 and the second sidewall 1-2, opposite position is respectively arranged with circular first through hole 1-1a and the second through hole 1-2a, and on described two through hole, same position is provided with the situation that illustrate only in internal tooth section 1-3(Fig. 1 and the second through hole 1-2a is arranged internal tooth section).Described internal tooth section 1-3 for matching spool locking with external tooth on spool, therefore the setting position of described internal tooth section 1-3 for be wound in the ribbon on spool lead corresponding to position.As described in the framework as shown in Fig. 1, outwards being drawn by described 3rd wall 1-4 inside top of ribbon, therefore described internal tooth section 1-3 is arranged at two through hole top.
Described framework 1 is also provided with other structure, and such as, lightening hole on two side, the interface connecting the strengthening rib of two side etc., repeat here no longer one by one.
Described spool 2 is wholy set among described framework 1, and on spool 2, two end cap is placed among the through hole of framework 1 sidewall respectively.During free state, rotatable the floating of described spool 2 is arranged among described retractor frame 1, and the external tooth on its end cap does not contact with the internal tooth of through hole on retractor frame 1.Spool 2 supported by the projecting shaft outside its end cap two ends, and spool 2 can freely rotate, and realizes winding and the release of ribbon.And when locking, the external tooth of described spool 2 two end cap is meshed with relevant position internal tooth on described framework 1, and spool 2 cannot rotate.
The end cap central of the spool of the present embodiment does not arrange through hole, arranged outside integral type projecting shaft.With torsion bar 3 with the use of time, the two ends of its torsion bar 3 are arranged at the two end cap place of spool, and do not pass end cap, namely relative to the torsion bar in background technology, the torsion bar contraction in length in the present embodiment.The projecting shaft that the part be shortened is arranged at outside end cap replaced.When colliding, ribbon drives described mandrel to rotate, and then drives torsion bar to rotate.And two end cap is locked on framework, two end cap engages the both ends of torsion bar simultaneously, and the both ends of torsion bar cannot be rotated.And engaged with the internal tooth of mandrel 2-1 by the circumferential external tooth at middle part in the middle part of torsion bar 3, make it bear the pulling force of ribbon, both ends are then fixed due to the meshing relation of the gear of end external tooth and end cap 2-2 inner end surface; When the pulling force of ribbon reaches certain degree, this torsion bar 3 twists deformation, thus make mandrel 2-1 that the rotation of certain angle occur, release portion ribbon, ribbon can suitably be released by the torsional deformation characteristic of this torsion bar 3, the binding force of ribbon to human body is made to control, a reservation value, to avoid the damage of excessive binding force to human body; Meanwhile, ribbon can not be released long distance again and cause the inefficacy to human body constraint.
In the present embodiment, due to torsion bar contraction in length, and the seam of boss and mandrel is arranged inside end cap, it only bears and comes from the application force of mandrel and the antagonistic force of end cap, torsion bar is avoided directly to bear ribbon tractive force, thus its force-bearing situation is simple and controlled, can design the force limit pin meeting limiter and require as required, and its in use safety and stability.In addition, torsion bar stage casing is reversed, and is easier to produce well-distributed distortion, avoids local stress too high and fracture failure; Meanwhile, the left and right sides bears the limiter value of half respectively, can reduce the diameter needed for torsion bar.Due to the torque requiremnt that the material demand fulfillment of torsion bar is special, its cost is high, and manufacture requirements is high, adopts short torsion bar can be obviously cost-saving in the present embodiment.
In addition, in the above embodiment of the present invention, the through hole of described retractor frame arranges internal tooth section 1-3, and the position of internal tooth section 1-3 for be wound in the ribbon on spool lead corresponding to position.All arrange the structure of internal tooth relative to the whole circle of through hole, the structure of the present embodiment can ensure that spool is locked in the position determined when locking, namely arranges the position of internal tooth section 1-3.
Secondly, in embodiments of the invention, the force limit pin 2-6 arranged at the mandrel two ends of described spool 2 is described above, when spool 2 lockup state, mandrel 2-1 is owing to receiving the pulling force from belt-strap, relative both sides end caps can produce rotating tendency, and the external tooth 3-1 in the middle part of described force limit pin 2-6 and torsion bar 3 can stop it to rotate.Force limit pin 2-6 is subject to the shearing force of end cap and mandrel 2-1.When colliding, there is the tractive force loading procedure changed from small to big rapidly in ribbon tractive force.In the process, when tractive force be less than force limit pin 2-6 bear threshold value time, the tractive force that described mandrel 2-1 bears is carried on force limit pin 2-6, and described torsion bar 3 is not born or mainly do not born this tractive force; When this value of thrust increase above force limit pin 2-6 bear threshold value time, force limit pin 2-6 will fracture, and torsion bar 3 starts the tractive force bearing the ribbon transmitted by mandrel 2-1 completely, and then the torsional deflection process of torsion bar 3 just can occur.Therefore force limit pin 2-6 can regulate the limiter threshold value of this safety strap.
In the present embodiment, the external tooth in the middle part of described torsion bar 3 is provided with hypodontia mouth, is called that dodging tooth lacks; Tooth of dodging as shown in Figure 11 lacks 3-1-1.Figure 10 is that middle part external tooth has and dodges the torsion bar that tooth lacks 3-1-1 and insert the schematic diagram that in mandrel 2-1, its outer toothed portion matches with mandrel through hole.As seen from Figure 10, described tooth of dodging lacks position that 3-1-1 arranges on torsion bar 3 and meets after this torsion bar 3 inserts the through hole of mandrel 2-1, dodge tooth lack 3-1-1 aim at or the upper setting of rough alignment mandrel 2-1 for passing and fixing the hold down groove 2-4 of ribbon 6.This hold down groove 2-4 is prolate type through hole, and it arranges and meets ribbon through the center shaft of direction perpendicular to described mandrel 2-1, and needs as much as possible close to described center shaft.Described dodge tooth to lack 3-1-1 be ribbon 6 to provide through hold down groove 2-4 allow bit space, ribbon 6 and this interference of tooth is caused to avoid arranging teeth at this place, and cause ribbon 6 at this place away from mandrel 2-1 line of centers, and be unfavorable for ribbon 6 mandrel 2-1 stable when straining.In an embodiment of the present invention, described torsion bar 3 is also provided with anti-side set and lacks.As shown in Figure 5, a wherein side end (for being set to example with right side in the present embodiment) of torsion bar 3 arranges anti-side set and lacks 3-2b-1, and opposite side then need not arrange this hypodontia mouth.Accordingly, the shrinkage pool on the spool end cap of this end also needs to arrange the structure matched.As shown in Figure 4, the corresponding anti-mismatch 2-2b-4 arranged in the shrinkage pool 2-2b-3 of end cap 2-2b.Arrange the reason that above-mentioned anti-side set lacks 3-2b-1 to be, lack 3-1-1 owing to there is above-mentioned tooth of dodging, described torsion bar 3 must insert the through hole 2-3 of mandrel with suitable angle, and anti-side set lacks the operation once success of inserting torsion bar 3 when 3-2b-1 can guarantee to assemble.
The end profile of tooth for the torsion bar 3 left end 3-2a shown in Fig. 5 shown in Fig. 6, Fig. 7 shows the cooperation figure that torsion bar 3 left end 3-2a inserts the shrinkage pool of left side end cap 2-2a; Fig. 8 is the end profile of tooth of the torsion bar 3 right-hand end 3-2b shown in Fig. 5, can see that the mistake proofing breach 3-2b-1 that its end is arranged, Fig. 9 show the cooperation figure that torsion bar 3 right-hand end 3-2b inserts the shrinkage pool of right side end cap 2-2b.
Arranging described mistake proofing breach 3-2b-1 at torsion bar 3 right-hand member causes the number of teeth at two ends, left and right different, and then the torsion that two ends are born when 3 distortion of torsion bar bar can be caused no longer identical.For this reason, this problem is solved by following mode in the present invention.
Arrange torsion bar 3 be positioned at middle part external tooth 3-1 to the right end 3-2b(namely the end of mistake proofing breach is set) tilt, make the circumferential external tooth flank of tooth in the middle part of torsion bar 3 lack 3-1-1 one end overall offset to arranging anti-side set.Figure 11 and Figure 12 respectively illustrates block diagram and the section-drawing of torsion bar 3, can find out by Figure 11 and Figure 12 the situation that tooth 3-1-2 tilts.Tilting to the right by arranging external tooth 3-1, being conducive to balance mandrel 2-1 and putting on power on this torsion bar 3, making its overall stress balance.
In addition, described torsion bar 3 is two sectional type structure separately, the exploded view that reel unit as shown in Figure 13 and torsion bar assemble.
Torsion bar comprises coaxial two sections: the first paragraph 3a and the second segment 3b that arrange.Two sections of described axial lengths are identical, all arrange external tooth vertically in the end of each section.When group is integrated, two sections of torsion bars are wherein docking together at two ends, and end face abuts against, and the external tooth teeth of opposite end are corresponding, not side set.The external tooth entirety at the two ends connected is equivalent to the circumferential external tooth at the middle part of above-mentioned integral type torsion bar.Its effect and same as the previously described embodiments with the connection mode of mandrel.The other two ends of two sections of torsion bars are inserted in the shrinkage pool of the end cap of spool respectively, and connection mode, with described identical in above-described embodiment, repeats no more here.In addition, described two sections of torsion bars connect end external tooth on all arrange and dodge tooth and lack, and two dodge tooth omission and put identical and common corresponding to and mandrel passes and fixes the hold down groove of ribbon end.This is dodged tooth and lacks and lack act on identical with the tooth of dodging of external tooth in the middle part of torsion bar in described embodiment, repeats no more here.Other parts in the present embodiment except torsion bar are identical with the above embodiments.
Torsion bar is set to discrete two sections and there is following effect: the torsion bar section of two same diameter or different-diameter can be combinationally used, may be combined with out multiple limiter value, thus less torsion bar can be adopted to form the taking-up device with multiple limiter value, meet the different requirements of different automobile vendor to safety strap limiter value.As Figure 14 and 15 respectively illustrates the schematic diagram of same diameter torsion bar section and different-diameter torsion bar Duan Zuwei torsion bar.In addition, the torsion bar of identical material or unlike material also can be used to combinationally use, different limiter effects can be obtained equally.
In addition, because torsion bar adopts special substance and processed by cold heading technique, for the torsion bar of each diameter, all independent mould to be had, its manufacturing equipment and mould costliness.Adopt the two sectional type torsion bar of the present embodiment, the torsion bar section that limited processing mold processes can be realized and be combined into the torsion bar with multiple limiter values, thus die sinking quantity can be reduced, save manufacturing cost.Further, the torsion bar of shorter size is more convenient for processing, and passing rate of processing is higher, and the cost of each mould is also relatively lower.
In addition, the material and the change diameter that change torsion bar section can use, to be combined into more evolutions simultaneously.Here repeat no more.
The present invention also protects a kind of safety strap assembly, and this safety strap assembly employs taking-up device described in above-described embodiment, and the beneficial effect that the taking-up device that can obtain above-described embodiment brings.Taking-up device can, referring to existing technology, no longer launch to discuss here to the assembling of ribbon and other relevant spare and accessory parts.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible variation and amendment, the scope that therefore protection scope of the present invention should define with the claims in the present invention is as the criterion.
Claims (6)
1. a spool, is applied to the taking-up device of safety strap, and this taking-up device comprises retractor frame, torsion bar and described spool; Described retractor frame comprises two relative sidewalls; The circular port of band internal tooth is provided with at described two side opposite position; Torsion bar is shaft-like, all arranges the external tooth of circumference at its both ends and middle part;
It is characterized in that, described spool comprises and axis is provided with through hole and mandrel for being wound around ribbon, and separable and be arranged at two end caps at mandrel two ends respectively; Described end cap is oblate bar shape; Each end cap is circumferentially provided with the external tooth that to match with the internal tooth profile of tooth of described retractor frame sidewall, and the central pit hole of band internal tooth is set towards the center of the inner end surface of mandrel, the external tooth profile of tooth of the internal tooth profile of tooth of a described central pit hole and described torsion bar wherein end matches; The middle section position of the through hole of position, described mandrel axis is provided with the internal tooth matched with external tooth in the middle part of described torsion bar;
In described two end cap, in the central pit hole of one of them end cap, be provided with mistake proofing hypodontia; One side end of described torsion bar arranges anti-side set and lacks;
In mandrel both sides, every side at least arranges two force limit pins; This force limit pin is fixed on the end face of described mandrel, and insertion end covers should the pin-and-hole that arranges of force limit pin position, or this force limit pin is fixed on described end cap, and inserts on end face of mandrel should the pin-and-hole that arranges of force limit pin position;
The force limit pin mis-aligned of relevant position, described mandrel both sides, circumferentially stagger fixing angle.
2. spool according to claim 1, is characterized in that, the center, end face side towards mandrel of described end cap is provided with boss, and described central pit hole is arranged on described boss; What be provided with the described boss of accommodation in the relevant position, end face side of described mandrel dodges space.
3. spool according to claim 1, is characterized in that: in described two end caps, wherein an end cap end face outside is provided with the projecting shaft matched with wind spring, and another end cap end face outside is provided with the projecting shaft coordinated with end instr.
4. spool according to claim 1, is characterized in that: be provided with annular boss in the outer, inner side of each end cap described, is provided with dodges seam in described mandrel both ends of the surface and described annular boss relevant position.
5. a Webbing retractor, is characterized in that, uses the spool described in any one of the claims 1 to 4.
6. a safety strap assembly, is characterized in that, uses the Webbing retractor described in the claims 5.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309320.6A CN102837665B (en) | 2012-08-27 | 2012-08-27 | Spool, end cap, Webbing retractor and safety strap assembly |
| EP13833997.3A EP2889191B1 (en) | 2012-08-27 | 2013-08-23 | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly |
| PCT/CN2013/082175 WO2014032546A1 (en) | 2012-08-27 | 2013-08-23 | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly |
| US14/421,457 US9718437B2 (en) | 2012-08-27 | 2013-08-23 | Winder, a torsion bar, a reel, end covers and a safety belt assembly used for a force limiting safety belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309320.6A CN102837665B (en) | 2012-08-27 | 2012-08-27 | Spool, end cap, Webbing retractor and safety strap assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102837665A CN102837665A (en) | 2012-12-26 |
| CN102837665B true CN102837665B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210309320.6A Expired - Fee Related CN102837665B (en) | 2012-08-27 | 2012-08-27 | Spool, end cap, Webbing retractor and safety strap assembly |
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| Country | Link |
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| CN (1) | CN102837665B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439263A (en) * | 2016-05-30 | 2018-08-24 | 衢州市易凡设计有限公司 | A kind of equipment of the hand-rail type cross sliding rail rescue of self-locking |
| CN108824059A (en) * | 2018-06-19 | 2018-11-16 | 东莞市联洲知识产权运营管理有限公司 | A kind of roller shell structure on paper-making drying cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1607288A1 (en) * | 2004-06-14 | 2005-12-21 | Delphi Technologies, Inc. | Safety apparatus |
| US7273191B2 (en) * | 2004-12-09 | 2007-09-25 | Autoliv Asp, Inc. | Low profile spline |
| US7318560B2 (en) * | 2004-12-09 | 2008-01-15 | Autoliv Asp, Inc. | Switchable load limiting seatbelt retractor |
| CN202743198U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Reel, end cover, safety belt retractor and safety belt assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4514271B2 (en) * | 2000-02-23 | 2010-07-28 | タカタ株式会社 | Seat belt retractor |
| JP5086210B2 (en) * | 2008-09-03 | 2012-11-28 | 株式会社東海理化電機製作所 | Webbing take-up device |
| JP5199197B2 (en) * | 2009-08-07 | 2013-05-15 | 株式会社東海理化電機製作所 | Webbing take-up device |
| 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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2012
- 2012-08-27 CN CN201210309320.6A patent/CN102837665B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1607288A1 (en) * | 2004-06-14 | 2005-12-21 | Delphi Technologies, Inc. | Safety apparatus |
| US7273191B2 (en) * | 2004-12-09 | 2007-09-25 | Autoliv Asp, Inc. | Low profile spline |
| US7318560B2 (en) * | 2004-12-09 | 2008-01-15 | Autoliv Asp, Inc. | Switchable load limiting seatbelt retractor |
| CN202743198U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Reel, end cover, safety belt retractor and safety belt assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102837665A (en) | 2012-12-26 |
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Effective date of registration: 20180404 Address after: 12 building, three mansion, No. 137, dry noo Road, Hongkong, China Patentee after: He Li Technology Co.,Ltd. Address before: 201206 room 2202, fangzheng mansion, No. 1122, Xin Jin Qiao Road, Pudong New Area, Shanghai Patentee before: HELIA TECHNOLOGY (SHANGHAI) Co.,Ltd. |
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Application publication date: 20121226 Assignee: ZHEJIANG SONGYUAN AUTOMOTIVE SAFETY SYSTEMS CO.,LTD. Assignor: He Li Technology Co.,Ltd. Contract record no.: 2018990000336 Denomination of invention: Coiling shaft, end cover, safety belt coiling device and safety belt assembly Granted publication date: 20151125 License type: Common License Record date: 20181207 |
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