CN102923091A - Torsion bar for safety belt retractor, safety belt retractor and safety belt assembly - Google Patents
Torsion bar for safety belt retractor, safety belt retractor and safety belt assembly Download PDFInfo
- Publication number
- CN102923091A CN102923091A CN2012103090265A CN201210309026A CN102923091A CN 102923091 A CN102923091 A CN 102923091A CN 2012103090265 A CN2012103090265 A CN 2012103090265A CN 201210309026 A CN201210309026 A CN 201210309026A CN 102923091 A CN102923091 A CN 102923091A
- Authority
- CN
- China
- Prior art keywords
- torsion bar
- mandrel
- tooth
- end cap
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Automotive Seat Belt Assembly (AREA)
Abstract
The invention provides a torsion bar for a safety belt retractor. The torsion bar is rod-like, peripheral outer teeth are arranged at two ends and in the middle of the torsion bar, the outer teeth at the two ends of the torsion bar are matched with inner teeth of central concave holes in the end faces of two end covers on the retractor, and the peripheral outer teeth in the middle of the torsion bar are matched with inner teeth on the middle section of a through hole in the middle axis of a core shaft; and the axial length of the torsion bar is not greater than that of a scroll. The torsion bar is shortened, so that bending deformation of the torsion bar is avoided, the torsion bar is not subjected to other restraint outside the end covers on the two sides, the overall stress condition of the torsion bar is simplified, and the torsion bar is safe and stable in use. The invention simultaneously provides the safety belt retractor using the torsion bar and a safety belt assembly.
Description
Technical field
The present invention relates to the safety strap technology, be specifically related to a kind of torsion bar for Webbing retractor.The present invention relates to a kind of Webbing retractor and safety strap assembly that uses described torsion bar simultaneously.
Background technology
Safety strap is the important passive security parts that are applied on the automobile.When collision happens, safety strap can be protected the user, makes it avoid or alleviate the secondary injury in when collision.
What be designed at first is applied to standard body-restraining seat belt on the automotive seat, the ribbon that it only comprises lockable mechanism and is used for regular user's (human body).When collision happens, lockable mechanism locking, ribbon no longer outwards stretch, thereby the user is bundled on the automotive seat.Yet because the impact moment velocity variations is very fast, it is very short that speed at time of impact changes the momentum change time that causes, so that ribbon acts on user's power with it is very large, for example can reach 8-10kN.Can cause user's rib to fracture even more serious injury.
Based on above-mentioned reason; the standard model safety strap is further improved; the limit type safety strap has been proposed; namely in impact moment; can act on by certain limiter mechanics limit ribbon the power on the human body; can not cause human body to be subject to the injury of ribbon itself, to reach the purpose of protecting to greatest extent the user.
Be in the European patent document of EP1607288B1 at document number, disclose a kind of safety device for the 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 with internal tooth.Spool comprises for the mandrel that twines ribbon and the separation type end cap that is arranged at the mandrel two ends.Described end cap be provided with framework on the external tooth that is complementary of internal tooth; Rotatable the floating of described spool is arranged on the described U-shaped framework, and two end cap is arranged at respectively in the circular port of described U-shaped framework, and under normal condition, the external tooth on the end cap and the internal tooth of described circular port do not mesh, spool can rotate in described circular port, to twine ribbon or to discharge ribbon.
Described torsion bar is shaft-like, be arranged at spool along described spool axis among, and connect by interior external tooth engagement system along the axis centre position at described spool; In addition, described two end cap center is passed at described torsion bar two ends, stretches out outside the end cap and is meshed with internal tooth on the two end cap by external tooth.
Above-mentioned limit type erecting device working process is as follows: when bumping, sensing device triggers the actuating mechanism that comprises gas generator, so that the external tooth on the end cap of spool is meshed with the internal tooth of U-shaped framework, spool is become lockup state by rotatable quick condition (also can be described as free state).So that the ribbon that is wrapped on the spool no longer outwards discharges.Thereby the user is fixed on the seat.In this process, what ribbon bore comes from the user owing to the power that the moves forward meeting that inertia produces is bigger and bigger, and this power is always in the mandrel rotation of attempting to draw spool.But the torsion bar of mandrel by being engaged with, be fixed on the U-shaped framework with the end cap of torsion bar engagement and can't rotate.When the tractive force of ribbon enough greatly can be so that torsion bar produces distortion when rotating, the rotation of certain angle will occur in mandrel, thereby so that ribbon can be released a segment length, and then so that the user can produce forward certain displacement, alleviate ribbon and act on user's pulling force with it, reach the effect that ribbon acts on user's power with it that limits, obtained the limiter effect.
The key character of above-mentioned patent is, the torsion bar two ends are fixed, and the stage casing is by interior external tooth engagement mandrel, so that torsional deflection is evenly distributed on the whole torsion bar, prevent stress raisers and rupture, and can take full advantage of the material of torsion bar, produce the limiter effect of stable and consistent.In addition, the torsion bar deformation process is symmetrical, makes taking-up device frame stressing balance, and the torsional deflection of framework is little.
The detailed content of the limit type erecting device of relevant above-mentioned patent documentation can be further referring to above-mentioned European patent document.
Yet the disclosed limit type safety device of above-mentioned European patent also has certain defective.Subject matter is, the both ends that torsion bar wherein stretches out end cap also are subject to the constrained force from other structures, so that whole torsion bar is stressed complicated, easily produce stress raisers and fracture failure.Because torsion bar stressing conditions and its extension at torsional direction have larger relation, the disclosed limit type safety device of described European patent can produce the complicated problem of torsion bar extension situation, makes this device be difficult to comparatively accurately control the limiter value.
In addition, the processing of torsion bar need to adopt cold-press process to guarantee the conformability of its characteristic, and part is longer, and difficulty of processing and die manufacturing cost are higher, and the torsion bar that above-mentioned European patent provides is long, makes its cost high, and manufacture difficulty is large.
Summary of the invention
The invention provides a kind of torsion bar for safety strap, to solve the problems referred to above of the torsion bar that has Webbing retractor now.The present invention provides taking-up device and the safety strap assembly that uses torsion bar in addition.
The invention provides a kind of torsion bar for Webbing retractor, described Webbing retractor comprises taking-up device framework and spool, described spool comprises the mandrel that is provided with through hole along the axis and is used for twining ribbon, and separable two end caps that are arranged at respectively the mandrel two ends; Described end cap arranges the center shrinkage pool with internal tooth towards the center of the inner end surface of mandrel; The middle section position of the through hole of position, described mandrel axis is provided with internal tooth;
Described torsion bar is shaft-like, be provided with circumferential external tooth at its both ends and middle part, and the center shrinkage pool internal tooth of the two end cap end face on the external tooth that is positioned at the torsion bar both ends and the taking-up device matches, and the circumferential external tooth that is positioned at the torsion bar middle part matches with the internal tooth of the middle section position setting of the through hole of position, described mandrel axis; Wherein, described torsion bar length vertically is not more than the axial length of described spool.
Preferably, having the tooth of dodging on the circumferential external tooth of described torsion bar middle part setting lacks;
Preferably, in the circumferential external tooth that one end thereof arranges, be provided with anti-side set and lacking with above-mentioned position corresponding to tooth phase shortage of dodging.
Preferably, described torsion bar is positioned at the external tooth profile of tooth at middle part to the sloped-end that the mistake proofing breach is set.
Preferably, describedly dodge position that tooth lacks corresponding to passing on the mandrel and the fixing hold down groove of ribbon end.
The invention provides a kind of Webbing retractor, comprise, taking-up device framework, spool and the described torsion bar for Webbing retractor of above-mentioned arbitrary technical scheme; Wherein,
Described taking-up device framework comprises two relative sidewalls; Be provided with circular port with internal tooth at described two side opposite position;
Described spool comprises the mandrel that is provided with through hole along the axis and is used for twining ribbon, and separable two end caps that are arranged at respectively the mandrel two ends; End cap is provided with external tooth along periphery, and towards the center of the inner end surface of mandrel the center shrinkage pool with internal tooth is set; The middle section position of the through hole of position, described mandrel axis is provided with internal tooth;
Described torsion bar passes the through hole of described mandrel, and the external tooth at middle part is meshed with the internal tooth of mandrel through-hole wall; Insert respectively among the center shrinkage pool of described spool two end cap at described torsion bar two ends, and the external tooth at two ends is meshed with the internal tooth of the center shrinkage pool of described end cap inner end surface; This torsion bar has stable ductility in circumferential distortion;
Under free state, rotatable the floating of described spool is arranged in the described taking-up device framework, and two end cap places the circular port of the two side of described taking-up device framework; When locking, the external tooth of described spool two end cap is meshed with internal tooth on the described framework.
The present invention also provides a kind of safety strap assembly, uses the described Webbing retractor of technique scheme.
Compared with prior art, torsion bar provided by the invention has the following advantages: the two ends of torsion bar are arranged at the two end cap place of spool, and do not pass end cap, with respect to the torsion bar in the background technology, and this torsion bar contraction in length; The part that background technology extends, the projecting shaft that is arranged at the end cap outside in this Webbing retractor replaces.The vehicle of the safety strap of application torsion bar of the present invention is when bumping, and ribbon drives described mandrel rotation, and drives the torsion bar rotation by the internal tooth in stage casing; And two end cap is locked on the framework, and two end cap meshes the both ends of torsion bar simultaneously, so that the both ends of torsion bar can't be rotated.Therefore rotate in the middle of the torsion bar, and does not rotate at both ends, makes it bear twisting resistance, when this twisting resistance is enough large, the deformation that can twist of this torsion bar, thereby so that the rotation of mandrel generation certain angle, the strength that release portion ribbon, ribbon act on the safety strap user health is minimized.Shorter than in the background technology of the torsion bar length that the present invention adopts, and do not stretch out vertically outside the end cap, this and is not come from outside the end cap of both sides other and is retrained so that torsion bar is difficult for occuring bending and deformation, the whole force-bearing situation of torsion bar is oversimplified, and use procedure is safer stable.Torsion bar is difficult for occuring bending and deformation, and the relative angle between mandrel and the end cap is maintained, and can not cause localized metallic friction and gummed between mandrel and the end cap.In addition, because the material of torsion bar need to satisfy special torsion requirement, its cost is high, and manufacturing requires high, and the present invention adopts short torsion bar can also save cost, reduces manufacture difficulty.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the taking-up device for safety strap of the present invention;
Fig. 2 is the structural representation of the spool among Fig. 1;
Fig. 3 is that Fig. 2 is along the axial cutaway view of spool;
Fig. 4 is the exploded view of reel unit and torsion bar assembling;
Fig. 5 is the structural representation of the embodiment of torsion bar of the present invention;
Shown in Fig. 6 is the end profile of tooth of torsion bar left end shown in Figure 5;
Fig. 7 shows the cooperation figure that the torsion bar left end is inserted the shrinkage pool of left side end cap;
Fig. 8 is the end profile of tooth of torsion bar right-hand end shown in Figure 5;
Fig. 9 shows the cooperation figure that the torsion bar right-hand end is inserted the shrinkage pool of right side end cap
Figure 10 is that the torsion bar that the middle part external tooth has a hypodontia mouth inserts the schematic diagram that its outer toothed portion matches with the mandrel through hole in the mandrel;
Figure 11 illustrates the block diagram of torsion bar;
Figure 12 illustrates the section-drawing of torsion bar.
The specific embodiment
A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement much to be different from alternate manner described here, and those skilled in the art can be in the situation that do similar popularization without prejudice to intension of the present invention, so the present invention is not subjected to the restriction of following public implementation.
Please refer to Fig. 5, it is the structural representation of torsion bar of the present invention.In the present embodiment, described torsion bar 3 is shaft-like, circumferentially is provided with external tooth 3-2a and external tooth 3-2b at its two ends and edge, middle part.And the center shrinkage pool internal tooth of the two end cap end face on the external tooth that is positioned at torsion bar 3 both ends and the taking-up device matches, and the circumferential external tooth that is positioned at the torsion bar middle part matches with the internal tooth of the middle section position setting of the through hole of position, described mandrel axis; Wherein, described torsion bar length vertically is not more than the axial length of described spool.
For better understanding the torsion bar of the present embodiment, below in conjunction with the Webbing retractor of using this torsion bar torsion bar of the present invention is elaborated.Need to prove, in the present embodiment, other parts of describing Webbing retractor mainly are in order better to understand the torsion bar of the present embodiment, and this description should not consist of the restriction to the application's claim protection domain.
Please refer to Fig. 1, it is the wherein a kind of structural representation of the taking-up device for safety strap of the present invention, and please referring to Fig. 1, taking-up device comprises shown in torsion bar 3(Fig. 4 above-mentioned in taking-up device framework 1, spool 2 and the present embodiment)
Wherein, described taking-up device framework 1 is U-shaped, and it comprises two relative sidewalls: the first side wall 1-1 and the second sidewall 1-2.Comprise that also two connect the 3rd wall 1-4 of described the first side wall 1-1 and the second sidewall 1-2.Opposite position is respectively arranged with circular the first through hole 1-1a and the second through hole 1-2a on described the first side wall 1-1 and the second sidewall 1-2, and same position is provided with among internal tooth section 1-3(Fig. 1 and only shows the situation that the second through hole 1-2a arranges the internal tooth section on described two through hole).Described internal tooth section 1-3 is used for matching the spool locking with external tooth on the spool, therefore the setting position of described internal tooth section 1-3 is the corresponding position of lead that is wound in the ribbon on the spool.As described in the framework shown in Fig. 1, outwards being drawn by described the 3rd wall 1-4 inside top of ribbon is therefore described internal tooth section 1-3 is arranged at the two through hole top.
Also be provided with other structure on described framework 1, for example interface of the strengthening rib of the lightening hole on the two side, connection two side etc. is given unnecessary details here no longer one by one.
Please referring to Fig. 2,3 and 4, wherein, Fig. 2 is the structural representation of the spool among Fig. 1; Fig. 3 is that Fig. 2 is along the axial cutaway view of spool; Fig. 4 is the exploded view of spool and torsion bar assembling.
Described spool 2 comprises mandrel 2-1 and the separable end cap that is 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 used for twining belt-strap, and it can maybe discharge braided strap winding thereon along its axis rotation with the ribbon that twines.Described mandrel is provided with through hole 2-3 along its axis, and through hole 2-3 inwall is provided with internal tooth.
On the both ends of the surface of described mandrel 2-1, be provided with respectively two outwardly directed pin 2-6, be called force limit pin 2-6.
On described mandrel 2-1, also be provided be used to passing and fixedly the prolate type hold down groove 2-4 of ribbon end and the lightening grooves 2-5 that is used for loss of weight.
The periphery of described two end cap is provided with external tooth, as shown in Figure 4, left side end cap 2-2a periphery arranges external tooth 2-2a-1, periphery at right side end cap 2-2b arranges external toothing 2-2b-1, and the tooth on the described two end cap is unidirectional tooth, the internal tooth section of two through hole matches on the mandrel 2-1 rotation direction when ribbon discharges, the external tooth of described two end cap periphery and described framework 1.
In described two end cap position corresponding to described force limit pin on the end face of mandrel 2-1, also be provided with pin-and-hole, the pin-and-hole 2-2b-2 on the right side end cap 2-2b as shown in Figure 4.When two end cap mode as shown in Figure 2 was arranged at described mandrel 2-1 both ends of the surface side, force limit pin inserted in the corresponding pin-and-hole.In addition, also force limit pin can be arranged at the end cap inboard, and in mandrel 2-1 end face relevant position pin-and-hole be set.Described force limit pin can be different at the setting position at mandrel two ends, and location when being used in whereby end cap and mandrel 2-1 assembling prevents left and right sides end cap loading error.Prior aspect is, the shearing force when this force limit pin 2-6 can also bear the mandrel rotation, and when this shearing force reaches a threshold value, be cut off.
Also be provided with center shrinkage pool (hereinafter to be referred as shrinkage pool) with internal tooth, the shrinkage pool 2-2b-3 on the right side end cap 2-2b as shown in Figure 4 towards the end face center of mandrel 2-1 in described two end cap.In the present embodiment, the shrinkage pool of two end cap is arranged on the boss that stretches out its place end face side.Corresponding end face of mandrel then arranges the seam that holds this boss.
In the outside of described two end cap end face (namely away from mandrel 2-1 end face) side, be provided with outwardly directed projecting shaft along the center of this end face.Right side projecting shaft 2-2b-5 as shown in fig. 1 and left side projecting shaft 2-2a-5 as shown in Figure 4.Wherein, left side projecting shaft 2-2a-5 is connected with end instr, and right side projecting shaft 2-2b-5 periphery is provided with tooth, is connected with wind spring.
When the torsion bar that uses the present embodiment was in the retractor spool, shown in Fig. 2,3 and 4, torsion bar 3 was inserted through among the through hole 2-3 of described mandrel 2-1, and its axially the external tooth at middle part be meshed with the internal tooth of the through hole 2-3 inwall setting of described mandrel 2-1.Left side end cap 2-2a and right side end cap 2-2b are covered in respectively the both ends of mandrel 2-1 from the left and right sides, and the force limit pin of relevant position is corresponding with pin-and-hole.Insert respectively among the shrinkage pool of described left and right sides end cap at the two ends of described torsion bar 3, and its end external tooth is meshed with the internal tooth of corresponding shrinkage pool.
Please continue with reference to figure 4, between the seam of the boss of described two end cap and mandrel 2-1, also be provided with wear ring 4b.This wear ring 4b generally adopts low-friction plastic to make, the seam position that cooperates between can the opposing end surface for end cap 2-2 and mandrel 2-1 provides transition, the metal covering of seam position can directly not contacted, the impact that the gummed effect of having avoided the mutual friction of metal covering phase to cause works on torsion bar.
Please continue with reference to figure 4, the inboard outer of end cap is provided with annular boss (the annular boss 2-2b-6 that the right-hand end shown in Fig. 4 covers), is provided with the seam of dodging that matches with annular boss in the end face relevant position of described mandrel 2-1; By annular boss being set and dodging fixing structure, can reduce the frictional area when mandrel 2-1 end face is relative with end cap to be rotated, thereby reduce the friction force between mandrel and the end cap, improve the stability of limiter effect.
Described spool 2 is wholy set among the described framework 1, and two end cap places respectively among the through hole of framework 1 sidewall on the spool 2.During free state, described spool 2 rotatable floating are arranged among the described taking-up device framework 1, and the internal tooth of through hole does not contact on the external tooth on its end cap and the taking-up device framework 1.Spool 2 is supported by the projecting shaft in its outside, 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 the described framework 1, and spool 2 can't rotate.
In the taking-up device of the present embodiment, the two ends of its torsion bar 3 are arranged at the two end cap place of spool, and do not pass end cap, with respect to the torsion bar in the background technology, and the torsion bar contraction in length of the present embodiment.The projecting shaft that the part that is shortened is arranged at the end cap outside replaces.Use the safety strap of the torsion bar of the above embodiments, when bumping, ribbon drives described mandrel rotation, and then drives the torsion bar rotation.And two end cap is locked on the framework, and two end cap meshes the both ends of torsion bar simultaneously, so that the both ends of torsion bar can't be rotated.And the internal tooth of the circumferential external tooth of torsion bar 3 middle parts by the middle part and mandrel 2-1 meshes, and makes its pulling force that bears ribbon, and both ends are then owing to the meshing relation of the gear of end external tooth and end cap 2-2 inner end surface is fixed; When the pulling force of ribbon reaches certain degree, the deformation that twists of this torsion bar 3, thereby so that the rotation of certain angle occurs in mandrel 2-1, the release portion ribbon, the torsional deformation characteristic of this torsion bar 3 can suitably be emitted ribbon, make ribbon be controlled at a reservation value to the binding force of human body, avoided excessive binding force to the damage of human body; Simultaneously, ribbon can not be emitted long distance again and be caused the inefficacy that human body is fettered.
As seen, because torsion bar contraction in length, and the seam setting of the inboard boss of end cap and mandrel, it only bears the application force that comes from mandrel and the antagonistic force of end cap, avoid torsion bar directly to bear the ribbon tractive force, thereby its force-bearing situation is simple and controlled, can design as required and satisfy the force limit pin that limiter requires, and its safety and stability in use.In addition, the torsion bar stage casing is reversed, and is easier to produce well-distributed distortion, avoids the too high and fracture failure of local stress; Simultaneously, the limiter value of half is born respectively in the left and right sides, can reduce the required diameter of torsion bar.Because the material of torsion bar need to satisfy special torsion requirement, its cost is high, and manufacturing requires high, adopts short torsion bar can obviously save cost in the present embodiment.
In addition, in the above embodiment of the present invention, at the through hole of described taking-up device framework internal tooth section 1-3 is set, and the position of internal tooth section 1-3 is the corresponding position of lead that is wound in the ribbon on the spool.The structure of internal tooth all is set with respect to the whole circle of through hole, and the structure of the present embodiment can guarantee that spool is locked in definite position when locking, and the position of internal tooth section 1-3 namely is set.
Secondly, in the embodiments of the invention, the force limit pin 2-6 that arranges at the mandrel two ends of described spool 2 as mentioned above, when spool 2 lockup state, mandrel 2-1 is owing to the pulling force of receiving from belt-strap, can produce rotation trend by relative both sides end cap, and the external tooth 3-1 at described force limit pin 2-6 and torsion bar 3 middle parts can stop its rotation.Force limit pin 2-6 is subject to the shearing force of end cap and mandrel 2-1.When bumping, there is the tractive force loading procedure that changes from small to big rapidly in the ribbon tractive force.In this process, when tractive force less than force limit pin 2-6 bear threshold value the time, the tractive force that described mandrel 2-1 bears is carried on the force limit pin 2-6, this tractive force is not born or mainly do not born to described torsion bar 3; When this value of thrust increase to above force limit pin 2-6 bear threshold value the time, force limit pin 2-6 will fracture, the tractive force of the ribbon that transmits by mandrel 2-1 is born in torsion bar 3 beginning fully, 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 at described torsion bar 3 middle parts is established and also is equipped with the hypodontia mouth, is called to dodge tooth and lack; The tooth of dodging as shown in Figure 11 lacks 3-1-1.Figure 10 is that the middle part external tooth has the schematic diagram that its outer toothed portion matches with the mandrel through hole among the torsion bar insertion mandrel 2-1 that dodges the scarce 3-1-1 of tooth.As seen from Figure 10, the described tooth of dodging lacks 3-1-1 after the position that arranges on the torsion bar 3 is satisfied this torsion bar 3 and inserted the through hole of mandrel 2-1, dodges that tooth lacks that 3-1-1 aims at or rough alignment mandrel 2-1 upper being used for of arranging passes and the fixing hold down groove 2-4 of ribbon 6.This hold down groove 2-4 is prolate type through hole, and it arranges and satisfies ribbon and pass perpendicular direction in the center shaft of described mandrel 2-1, and needs as much as possible near described center shaft.The described tooth of dodging lacks 3-1-1 and provides and allow bit space for ribbon 6 passes hold down groove 2-4, cause ribbon 6 and this interference of tooth to avoid at this place teeth being set, and cause ribbon 6 at this place away from mandrel 2-1 line of centers, and be unfavorable for ribbon 6 when tension mandrel 2-1 stable.
In an embodiment of the present invention, it is scarce that described torsion bar 3 also is provided with anti-side set.As shown in Figure 5, a wherein side end of torsion bar 3 (being to be set to example with the right side in the present embodiment) arranges anti-side set and lacks 3-2b-1, and opposite side then needn't arrange this hypodontia mouth.Accordingly, the shrinkage pool on the spool end cap of this end also needs to arrange the structure that matches.As shown in Figure 4, the corresponding anti-mismatch 2-2b-4 that in the shrinkage pool 2-2b-3 of end cap 2-2b, arranges.The reason that above-mentioned anti-side set lacks 3-2b-1 is set is, owing to existing the above-mentioned tooth of dodging to lack 3-1-1, described torsion bar 3 must insert with suitable angle the through hole 2-3 of mandrel, and anti-side set lacks the once success of operation of inserting torsion bar 3 when 3-2b-1 can guarantee to assemble.
Shown in Fig. 6 is the end profile of tooth of torsion bar 3 left end 3-2a shown in Figure 5, and Fig. 7 shows the cooperation figure that torsion bar 3 left end 3-2a insert the shrinkage pool of left side end cap 2-2a; Fig. 8 is the end profile of tooth of torsion bar 3 right-hand end 3-2b shown in Figure 5, can see the mistake proofing breach 3-2b-1 that its end arranges, and Fig. 9 shows the cooperation figure that torsion bar 3 right-hand end 3-2b insert the shrinkage pool of right side end cap 2-2b.
At torsion bar 3 right-hand members described mistake proofing breach 3-2b-1 is set and causes the number of teeth at two ends, the left and right sides different, and then can cause the torsion that bear at two ends when 3 distortion of torsion bar bar no longer identical.For this reason, address this problem by following mode among the present invention.
Arrange external tooth 3-1 that torsion bar 3 is positioned at the middle part to the right end 3-2b(the end of mistake proofing breach namely is set) tilt,, make the circumferential external tooth flank of tooth at torsion bar 3 middle parts lack 3-1-1 one end overall offset to anti-side set is set.Figure 11 and Figure 12 show respectively block diagram and the section-drawing of torsion bar 3, can find out the situation that tooth 3-1-2 tilts by Figure 11 and Figure 12.Tilt to the right by external tooth 3-1 is set, be conducive to balance mandrel 2-1 and put on power on this torsion bar 3, make its whole stress balance.
The present invention also protects a kind of Webbing retractor, and this Webbing retractor has used the torsion bar of above-described embodiment.Be applied to ins and outs in the taking-up device about torsion bar, the concrete structure of this taking-up device can be referring to the top embodiment that torsion bar is described.Here no longer be repeated in this description.
The present invention also protects a kind of safety strap assembly, and this safety strap assembly has used the described taking-up device of above-described embodiment, and can obtain the beneficial effect that the taking-up device of above-described embodiment brings.Taking-up device can referring to existing technology, no longer launch to discuss here with 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 to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (7)
1. torsion bar that is used for Webbing retractor, described Webbing retractor comprises taking-up device framework and spool, described spool comprises the mandrel that is provided with through hole along the axis and is used for twining ribbon, and separable two end caps that are arranged at respectively the mandrel two ends; Described end cap arranges the center shrinkage pool with internal tooth towards the center of the inner end surface of mandrel; The middle section position of the through hole of position, described mandrel axis is provided with internal tooth; It is characterized in that:
Described torsion bar is shaft-like, be provided with circumferential external tooth at its both ends and middle part, and the center shrinkage pool internal tooth of the two end cap end face on the external tooth that is positioned at the torsion bar both ends and the taking-up device matches, and the circumferential external tooth that is positioned at the torsion bar middle part matches with the internal tooth of the middle section position setting of the through hole of position, described mandrel axis; Wherein, described torsion bar length vertically is not more than the axial length of described spool.
2. the torsion bar for Webbing retractor according to claim 1 is characterized in that, has the tooth of dodging on the circumferential external tooth that described torsion bar middle part arranges and lacks.
3. the torsion bar for Webbing retractor according to claim 2 is characterized in that, in the circumferential external tooth that one end thereof arranges, is being provided with anti-side set and lacks with above-mentioned position corresponding to tooth phase shortage of dodging.
4. the torsion bar for Webbing retractor according to claim 3 is characterized in that: described torsion bar is positioned at the external tooth profile of tooth at middle part to the sloped-end that the mistake proofing breach is set.
5. the torsion bar for Webbing retractor according to claim 2 is characterized in that, describedly dodges position that tooth lacks corresponding to passing on the mandrel and the fixing hold down groove of ribbon end.
6. a Webbing retractor is characterized in that, comprises taking-up device framework, spool and the claims 1 to 5 arbitrary described torsion bar for Webbing retractor; Wherein,
Described taking-up device framework comprises two relative sidewalls; Be provided with circular port with internal tooth at described two side opposite position;
Described spool comprises the mandrel that is provided with through hole along the axis and is used for twining ribbon, and separable two end caps that are arranged at respectively the mandrel two ends; End cap is provided with external tooth along periphery, and towards the center of the inner end surface of mandrel the center shrinkage pool with internal tooth is set; The middle section position of the through hole of position, described mandrel axis is provided with internal tooth;
Described torsion bar passes the through hole of described mandrel, and the external tooth at middle part is meshed with the internal tooth of mandrel through-hole wall; Insert respectively among the center shrinkage pool of described spool two end cap at described torsion bar two ends, and the external tooth at two ends is meshed with the internal tooth of the center shrinkage pool of described end cap inner end surface; This torsion bar has stable ductility in circumferential distortion;
Under free state, rotatable the floating of described spool is arranged in the described taking-up device framework, and two end cap places the circular port of the two side of described taking-up device framework; When locking, the external tooth of described spool two end cap is meshed with internal tooth on the described framework.
7. a safety strap assembly is characterized in that, uses the claims 6 described Webbing retractors.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309026.5A CN102923091B (en) | 2012-08-27 | 2012-08-27 | For torsion bar and Webbing retractor, the safety strap assembly of Webbing retractor |
| PCT/CN2013/082175 WO2014032546A1 (en) | 2012-08-27 | 2013-08-23 | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly |
| EP13833997.3A EP2889191B1 (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 |
|---|---|---|---|
| CN201210309026.5A CN102923091B (en) | 2012-08-27 | 2012-08-27 | For torsion bar and Webbing retractor, the safety strap assembly of Webbing retractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102923091A true CN102923091A (en) | 2013-02-13 |
| CN102923091B CN102923091B (en) | 2015-10-07 |
Family
ID=47638069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210309026.5A Expired - Fee Related CN102923091B (en) | 2012-08-27 | 2012-08-27 | For torsion bar and Webbing retractor, the safety strap assembly of Webbing retractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102923091B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111956394A (en) * | 2020-08-24 | 2020-11-20 | 中山市艾顿光电有限公司 | Adjustable light and thin goggles for myopia |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060124795A1 (en) * | 2004-12-09 | 2006-06-15 | Autoliv Asp, Inc. | Switchable load limiting seatbelt retractor |
| US20110031340A1 (en) * | 2009-08-07 | 2011-02-10 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Webbing take-up device |
| CN102602360A (en) * | 2011-11-29 | 2012-07-25 | 延锋百利得（上海）汽车安全***有限公司 | Car seat belt retractor |
| CN202743199U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Torsion rod for safety belt winder, safety belt winder and safety belt assembly |
-
2012
- 2012-08-27 CN CN201210309026.5A patent/CN102923091B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060124795A1 (en) * | 2004-12-09 | 2006-06-15 | Autoliv Asp, Inc. | Switchable load limiting seatbelt retractor |
| US20110031340A1 (en) * | 2009-08-07 | 2011-02-10 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Webbing take-up device |
| CN102602360A (en) * | 2011-11-29 | 2012-07-25 | 延锋百利得（上海）汽车安全***有限公司 | Car seat belt retractor |
| CN202743199U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Torsion rod for safety belt winder, safety belt winder and safety belt assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111956394A (en) * | 2020-08-24 | 2020-11-20 | 中山市艾顿光电有限公司 | Adjustable light and thin goggles for myopia |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102923091B (en) | 2015-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102837664B (en) | A kind of taking-up device for safety strap and safety strap assembly | |
| CN202743196U (en) | Winder for safety belt and safety belt assembly | |
| US6739541B2 (en) | Seat belt retractor with load limiting | |
| CN202743198U (en) | Reel, end cover, safety belt retractor and safety belt assembly | |
| EP2889191B1 (en) | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly | |
| JP6198746B2 (en) | Seat belt retractor | |
| CN102490681B (en) | Seat belt retractor | |
| CN202743199U (en) | Torsion rod for safety belt winder, safety belt winder and safety belt assembly | |
| JP2014201122A5 (en) | ||
| CN103963737B (en) | Coiler, end cap, annular gear ring and seat belt assembly for seat belt | |
| EP1494898B1 (en) | Seat belt retractor | |
| CN102837663B (en) | For torsion bar and Webbing retractor, the safety strap assembly of Webbing retractor | |
| CN102837665B (en) | Spool, end cap, Webbing retractor and safety strap assembly | |
| CN102923091A (en) | Torsion bar for safety belt retractor, safety belt retractor and safety belt assembly | |
| CN202743195U (en) | Torsion rod for safety belt winder, safety belt winder and safety belt assembly | |
| CN204222803U (en) | Webbing retractor | |
| US9212024B2 (en) | Webbing retractor | |
| CN103847684B (en) | For the torque arm of Webbing retractor, Webbing retractor and seat belt assembly | |
| JP5133843B2 (en) | Webbing take-up device | |
| CN211001239U (en) | Dabber subassembly and safety belt coiler | |
| US8540179B2 (en) | Webbing take-up device | |
| CN214929582U (en) | Safety belt retractor | |
| CN112248965B (en) | Pretension force limiting stop type mandrel and retractor | |
| JP2011037411A (en) | Webbing winding device | |
| CN108238001A (en) | For the torque arm of seat belt retractor, seat belt retractor and safety belt assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180408 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. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20130213 Assignee: ZHEJIANG SONGYUAN AUTOMOTIVE SAFETY SYSTEMS CO.,LTD. Assignor: He Li Technology Co.,Ltd. Contract record no.: 2018990000336 Denomination of invention: Torsion bar for safety belt retractor, safety belt retractor and safety belt assembly Granted publication date: 20151007 License type: Common License Record date: 20181207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20210827 |