CN103963737A - Safety belt winder, end cap, annular tooth ring and safety belt assembly - Google Patents
Safety belt winder, end cap, annular tooth ring and safety belt assembly Download PDFInfo
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- CN103963737A CN103963737A CN201310032779.0A CN201310032779A CN103963737A CN 103963737 A CN103963737 A CN 103963737A CN 201310032779 A CN201310032779 A CN 201310032779A CN 103963737 A CN103963737 A CN 103963737A
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- 238000003032 molecular docking Methods 0.000 claims description 8
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- 238000000926 separation method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 7
- 230000000750 progressive effect Effects 0.000 abstract 1
- 208000027418 Wounds and injury Diseases 0.000 description 8
- 230000006378 damage Effects 0.000 description 5
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- 208000014674 injury Diseases 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 238000010008 shearing Methods 0.000 description 2
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Abstract
A safety belt winder comprises a winder frame, a winding shaft and a torque rod, wherein the torque rod is rod-like and arranged in a through hole of the winding shaft, and the two end parts of the torque rod extend to end caps on the two sides of a mandrel at least; outer teeth arranged in the middle of the axis of the winding shaft, of the torque rod are meshed with inner teeth arranged in the middle of the mandrel, and the torque rod is meshed with one end cap through a gear in a position intercrossed with the end cap; the torque rod is screwed with the other end cap through inner and outer threads in a position intercrossed with the other end cap, and the other end cap is named as the second end cap; the winding shaft is arranged in the winder frame in a rotatable floating way in a free state, the two end caps are arranged in round holes in the two side walls of the winder frame, and the torque rod is not tightly screwed with the second end cap through the inner and outer threads; during locking, the outer teeth of the two end caps of the winding shaft are meshed with the inner tooth section on the frame. Progressive increase type force limit can be realized when the winder is applied to a safety belt device. The invention further discloses an end cap, an annular tooth ring and a safety belt assembly adopting the winder.
Description
Technical field
The present invention relates to safety strap technology, be specifically related to a kind of taking-up device for safety strap.The present invention relates to a kind of end cap, annular gear ring simultaneously and uses the safety strap assembly of described taking-up device.
Background technology
Safety strap is the important passive security parts that are applied on automobile.In the time of collision happens, safety strap can be protected user, the secondary injury when it being avoided or alleviating collision.
What be designed at first is applied to the standard body-restraining seat belt on automotive seat, and it only comprises lockable mechanism and the ribbon for regular user's (human body).In the time of collision happens, lockable mechanism locking, ribbon no longer outwards stretches, thereby user is bundled on automotive seat.
But because impact moment velocity variations is very fast, it is very short that speed at time of impact changes the momentum change time causing, makes ribbon act on user's power with it very large, for example, can reach 8 to 10kN.So large application force can cause user's rib to fracture even causing more serious injury.
Based on above-mentioned reason; standard model safety strap is further improved; limit type safety strap has been proposed; in impact moment; can act on the power on human body by certain limiter mechanics limit ribbon; can not cause human body to be subject to the injury of ribbon itself, to reach the object of protecting to greatest extent user.
In the European patent document that is EP1607288B1 at document number, a kind of safety device for limit type safety strap is disclosed.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 the mandrel for being wound around ribbon and is arranged at the separation type end cap at mandrel two ends.On described end cap, be provided with framework on the external tooth that matches of internal tooth; Rotatable the floating of described spool is arranged on described U-shaped framework, and two end cap is arranged at respectively in the circular port of described U-shaped framework.Under normal condition, the external tooth on end cap does not engage with the internal tooth of described circular port, and spool can rotate in described circular port, to be wound around ribbon or to discharge ribbon.
Described torsion bar is shaft-like, is arranged among spool, and connects by interior external tooth engagement system along axis centre position at described spool along described spool axis; In addition, described torsion bar two ends, through described two end cap center, are stretched out outside end cap and by external tooth and are meshed with the internal tooth in two end cap.
Above-mentioned limit type erecting device working process is as follows: in the time bumping, sensing device triggers the actuating mechanism including gas generator, external tooth on the end cap of spool is meshed with the internal tooth of U-shaped framework, spool is become to lockup state from rotatable quick condition (also can be described as free state).The ribbon that makes to be wrapped on spool no longer outwards discharges, thereby user is fixed on seat.In this process, the power moving 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 of attempting to draw spool.But mandrel is fixed on U-shaped framework by the torsion bar being engaged with, the end cap engaging with torsion bar and cannot rotates.In the time that the tractive force of ribbon enough can make greatly torsion bar produce distortion rotation, will there is the rotation of certain angle in mandrel, thereby 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 power with it, obtained 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 evenly distributed on whole torsion bar, prevent stress raisers and rupture, and can make full use of the material of torsion bar, producing the limiter effect of stable and consistent.In addition, torsion bar deformation process symmetry, makes taking-up device frame stressing balance, and the torsional deflection of framework is little.About the detailed content of the limit type erecting device of above-mentioned patent documentation, can be further referring to above-mentioned European patent document.
The disclosed limit type safety device of above-mentioned European patent document is constant force limit type, and also referred to as one-level limit type or single-stage limit type, its limiter value and the characteristic curve of time as shown in Figure 7, reach after a certain value at ribbon application force, keep invariable.Except above-mentioned constant force limit type safety device, sometimes also wish to obtain limiter characteristic curve as Fig. 8 increase progressively limit type safety device, and limiter characteristic curve is as the limit type safety device that successively decreases of Fig. 9.Especially as shown in Figure 8 increase progressively limit type safety device, the adult-passenger to some car rear-row seats and to the children on child safety seat are set at back seat, has better protection effect.Thereby, be necessary further to improve on the basis of above-mentioned constant force limit type safety device, obtain and there are the characteristic safety strap of the limiter of increasing progressively and parts thereof.
Summary of the invention
The invention provides a kind of taking-up device for safety strap, taking-up device of the present invention is applied on seat belt apparatus can realize incremental limiter.The present invention provides in addition a kind of end cap, annular gear ring and uses the safety strap assembly of described taking-up device.
A kind of taking-up device for safety strap provided by the invention, comprising: taking-up device framework, spool and torsion bar; Wherein,
Described taking-up device framework comprises two relative sidewalls; In described two side, opposite position is provided with the circular port with internal tooth section; Described tooth section is arranged at position corresponding to the outside lead of ribbon.
Spool comprises and is provided with through hole along axis and for being wound around the mandrel of ribbon and being arranged at the separation type end cap at mandrel two ends; On described end cap along periphery be provided with described taking-up device framework on the external tooth that matches of internal tooth section;
Described torsion bar is shaft-like, and it is arranged among spool through hole along spool axis, and both ends at least extend to the end cap of mandrel both sides; The external tooth that described torsion bar arranges at described spool axis middle part engages with the internal tooth of mandrel middle part setting, is engaging by gear with the crossover location of an end cap wherein with this end cap, and this end cap is called the first end cap; Mutually screwing by internal and external threads and this another end cap with the crossover location of another end cap, this another end cap is called the second end cap;
Under free state, rotatable the floating of described spool is arranged in described taking-up device framework, and two end cap is placed in the circular port of the two side of described taking-up device framework, and between described torsion bar and described the second end cap, internal and external threads does not screw; In the time of locking, the external tooth of described spool two end cap is meshed with the internal tooth section on described framework.
Optionally, also comprise that periphery arranges outside thread and endoporus and arrange the annular gear ring of internal tooth,
Be provided with the tapped bore matching with described annular gear ring periphery screw thread towards the end face side central authorities of described mandrel at described the second end cap;
Be provided with the external tooth matching with described annular gear ring internal tooth in the end corresponding to this second end cap of described torsion bar;
After assembling, the external tooth of described torsion bar end is placed in described annular gear ring, and described annular gear ring screws in the tapped bore of described the second end cap.
Optionally, the axial length of described torsion bar is not more than the axial length of described spool;
The shrinkage pool that is set to have internal tooth at described the first end cap towards the end face side central authorities of described mandrel, the respective end of described torsion bar is provided with the circumferential external tooth matching with described shrinkage pool;
The described tapped bore arranging on described the second end cap is blind hole.
Optionally, two side lever sections of the external tooth of described torsion bar axis middle part setting effective length difference in the axial direction.
Optionally, described torsion bar is axially being split up into two sections that are docking together, and the two ends of each section of torsion bar are provided with external tooth, and the external tooth profile of tooth of two sections of torsion bar docking ends aligns; The common external tooth that forms the setting of described middle part of circumferential external tooth of described two sections of torsion bars docking end.
Optionally, two of described torsion bar sections have respectively different diameters and/or different materials.
Optionally, described torsion bar length is vertically greater than described spool in axial length; The through hole that is set to have internally toothed annulus at described the first end cap towards the end face side central authorities of described mandrel, the respective end of described torsion bar is provided with the circumferential external tooth matching with described shrinkage pool;
The described tapped bore arranging on described the second end cap is through hole.
The present invention also provides a kind of end cap, and this end cap is applied to the taking-up device described in above-mentioned any one, and wherein, described end cap is flat cylindrical, and tapped center shrinkage pool is set in the center of one end side; Circumferential whole circle along described end cap is provided with external tooth.
The present invention also provides a kind of annular gear ring, and this annular gear ring is applied to the taking-up device described in above-mentioned any one, and wherein, described annular gear ring periphery is provided with outside thread, and endoporus is along being circumferentially provided with internal tooth.
The present invention also provides a kind of safety strap assembly, and described safety strap assembly uses the Webbing retractor described in above-mentioned any one.
Compared with prior art, the taking-up device for safety strap provided by the invention, its torsion bar one end is meshed by gear with the first end cap, and the other end screws mutually by screw thread and the second end cap, but does not screw but retain the pitch of a fixing turn; Adopt this structure can realize incremental limiter.Specific implementation process is as described below:
Apply the safety device of this taking-up device, in the time bumping, the rotation of ribbon band moving mandrel, engage with the internal tooth of mandrel by the circumferential external tooth at middle part at torsion bar middle part, makes its pulling force that bears ribbon, drives torsion bar to rotate; And due in the time that ribbon is strained, the two end cap of mandrel can be locked on framework, the torsion bar end of wherein engaging with the first end cap is fixed and cannot rotates, and the end screwing mutually with the second end cap and this second end cap retain certain thread turns and be rotatable; That is to say, in the time that the pulling force of ribbon reaches the first limiter value, the end of engaging with the first end cap maintains static, and all can there is certain rotation with end and whole torsion bar that the second end cap screws mutually, this makes the stressed and distortion that twists of the first bar section of torsion bar, and then makes the rotation of mandrel generation certain angle, release portion ribbon, the torsional deformation characteristic of this torsion bar can suitably be emitted ribbon, realizes first order limiter; Along with ribbon continues mandrel to apply pulling force, torsion bar is screwed with the end thread that the second end cap screws mutually, this torsion bar end no longer rotates, in the time that ribbon pulling force reaches the second limiter value, the second bar section starts stressed, now, the first bar section and the second bar section are simultaneously stressed, all rotate, ribbon is released again a part, thereby has realized second stage limiter; Because the limiter value of first order limiter is determined by the first bar section, and the limiter value of second stage limiter is determined by the first bar section and the second bar section simultaneously, therefore second stage limiter value is greater than first order limiter value, has showed incremental limiter.
Apply the safety device of above-mentioned incremental limiter, for example, under the situation that does not have other safety measures (safety air bag) simultaneously to protect, have the meaning of particular importance.For example, automobile rear, or the position of generally safety air bag not being installed such as child seat, use the safety strap of above-mentioned incremental limiter can play better protective effect.Reason is, in the situation that there is no safety air bag, while crashing, leaning forward of the large distance of passenger of can not leaving, need to, after less one-level limiter release portion ribbon, increase limiter value, when ribbon is drawn out, need to overcome larger torsion, the distance leaning forward with restriction passenger, avoids other position of impact front seat or automobile; Less one-level limiter has been avoided the damage to human body of excessive binding force.
Brief description of the 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 in Fig. 1;
Fig. 3 is the exploded view of spool and torsion bar assembling;
Fig. 4 is that Fig. 2 is along the axial cutaway view of spool;
Fig. 5 is the partial enlarged drawing in Fig. 4;
Fig. 6 is the structural representation of integral type torsion bar;
Fig. 7 is the limiter value of constant force limit type safety device and the performance diagram of time;
Fig. 8 increases progressively the limiter value of limit type safety device and the performance diagram of time;
Fig. 9 is successively decrease the limiter value of limit type safety device and the performance diagram of time.
Detailed description of the invention
A lot of details are set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, and therefore the present invention is not subject to the restriction of following public concrete enforcement.
Please refer to Fig. 1, it is the structural representation of the embodiment of the taking-up device for safety strap of the present invention; In the present embodiment, taking-up device comprises taking-up device framework 1, spool 2 and torsion bar 3 (shown in Fig. 3)
Wherein, described taking-up device framework 1 is U-shaped, comprises two relative sidewalls: the first side wall 1-1 and the second sidewall 1-2.Also comprise the 3rd wall 1-4 that connects described the first side wall 1-1 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 the first through hole 1-1a and the second through hole 1-2a.On described two through hole, relevant position is provided with internal tooth section 1-3.Described internal tooth section 1-3 is for matching spool locking with external tooth on spool (narration below can describe in detail spool and external tooth thereof).Therefore the position that described internal tooth section 1-3 arranges is the corresponding position of lead that is wound in the ribbon on spool.As described in the framework as shown in Fig. 1, ribbon is outwards drawn by described the 3rd wall 1-4 inside top, therefore described internal tooth section 1-3 is arranged at two through hole top.By in above-mentioned position, internal tooth section being set, the lock position of taking-up device can be fixed on to the position that internal tooth section is set.This has overcome the unfixed problem of taking-up device lock position in background technology, is conducive to improve the accuracy to taking-up device control, comprises thereby can improve the stability using with the safety strap of this taking-up device.
On described framework 1, be also provided with other structure, for example interface of the strengthening rib of the lightening hole on two side, connection two side etc., repeats here no longer one by one.
Please refer to Fig. 2,3,4 and Fig. 5.Wherein, Fig. 2 is the structural representation of the spool in Fig. 1; Fig. 3 is the exploded view of spool and torsion bar assembling; Fig. 4 is that Fig. 2 is along the axial cutaway view of spool; Fig. 5 is the partial enlarged drawing in Fig. 4.
Described spool 2 comprises mandrel 2-1 and the separable end cap that is arranged at described mandrel 2-1 two ends: the first end cap 2-2a and the second end cap 2-2b.Described mandrel 2-1 is used for being wound around belt-strap, and it can maybe discharge braided strap winding thereon along its axis rotation by the ribbon being wound around.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.
In 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.In described two end cap position corresponding to described force limit pin on the end face of mandrel 2-1, be also provided with pin-and-hole, as shown in Figure 3 the pin-and-hole 2-2b-2 on the second end cap 2-2b.
On described mandrel 2-1, be also provided with for through and the prolate type hold down groove 2-4 of fixing ribbon end and for the lightening grooves 2-5 of loss of weight.But described lightening grooves 2-5 not necessarily, this lightening grooves also can be set.
The periphery of described two end cap is provided with external tooth, and as shown in Figures 2 and 3, the first end cap 2-2a periphery arranges external tooth 2-2a-1, in the periphery of the second end cap 2-2b, external toothing 2-2b-1 is set.External tooth in described two end cap is unidirectional tooth, mandrel 2-1 rotation direction in the time that ribbon discharges, and the external tooth of described two end cap periphery matches with the internal tooth section of the upper two through hole of aforesaid frame 1 (shown in Fig. 1).
In the time that two end cap is arranged at described mandrel 2-1 both ends of the surface side in mode as shown in Figure 2, described force limit pin inserts in corresponding pin-and-hole.In addition, also force limit pin can be arranged to end cap inner side, 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 while being used in whereby end cap and mandrel 2-1 assembling, prevents left and right end cap loading error.Prior aspect is, shearing force when this force limit pin 2-6 can also bear mandrel rotation, and be cut off in the time that this shearing force reaches a threshold value.
The end face side central authorities towards mandrel 2-1 at described the first end cap 2-2a are also provided with the shrinkage pool (Fig. 3 is not shown) with internal tooth.In the present embodiment, described shrinkage pool is arranged on the boss that stretches out its place end face side, and the seam of this boss is held in the corresponding end-faces side setting of mandrel 2-1.By this boss is set, and described shrinkage pool is arranged on boss, can effectively improves the intensity of the first end cap 2-2a.
In the present embodiment, described the second end cap 2-2b is provided with the female tapped bore 2-2b-3 of tool towards the end face side central authorities of described mandrel 2-1, and described tapped bore 2-2b-3 is blind hole.Especially, in the present embodiment, as shown in Figure 3, described tapped bore 2-2b-3 is arranged on the boss 2-2b-4 that stretches out its place end face side.Corresponding therewith, need be provided with in the corresponding end-faces side of mandrel 2-1 the seam that holds this boss 2-2b-4.
In the outer face of described two end cap (away from mandrel 2-1 end face) side, be provided with outwardly directed projecting shaft along the center of this end face.Projecting shaft 2-2b-5 as shown in Figure 1 and Figure 3.Wherein, one of them in two projecting shafts is connected with end instr.Another periphery is provided with tooth, is connected with wind spring.
The taking-up device of the present embodiment also comprises torsion bar 3 as shown in Figure 3, and described torsion bar 3 is shaft-like, and described torsion bar is axially being split up into two sections, is called the first bar section 3a and the second bar section 3b.Two ends in each bar section are provided with external tooth.In the time that described two sections of torsion bar groups are integrated, two sections of torsion bars are wherein docking together at two ends, and end face connects, and the external tooth teeth of opposite end align, not side set, integrant torsion bar.Be positioned at the internal tooth that the external tooth of docking end, two ends of torsion bar and the through hole of described mandrel 2-1 arrange and match, as shown in Figure 4.
The shrinkage pool internal tooth being positioned on the wherein external tooth of an outer end of torsion bar and the first upper end cap 2-2a of the taking-up device of the present embodiment (torsion bar specifically describes in the following description with the relation that matches of taking-up device) matches.Match with the endoporus internal tooth of annular gear ring 3 as shown in Figure 3 and be positioned at the external tooth of another outer end of torsion bar.In the present embodiment, described torsion bar 3 length is vertically not more than the axial length of retractor spool.It should be noted that, in the description of the present embodiment, if relate to torsion bar, be a certain section of torsion bar unless expressly stated, all refers to by above-mentioned two sections of entirety that combine.
In the present embodiment, the endoporus of described annular gear ring 3 is provided with the internal tooth of whole circle, and this internal tooth is described above, matches with an outer end of torsion bar.Periphery is along being circumferentially provided with outside thread, and this outside thread matches with the negative thread of the tapped bore 2-2b-3 on described the second end cap 2-2b.
When assembling, 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 of the through hole 2-3 inwall setting of described mandrel 2-1.The first end cap 2-2a and the second end cap 2-2b are covered in respectively the both ends of mandrel 2-1 from two ends, left and right, the force limit pin of relevant position is corresponding with pin-and-hole.Insert among the shrinkage pool of described the first end cap 2-2a wherein one end of described torsion bar 3, and its end external tooth is meshed with the internal tooth of corresponding shrinkage pool; The other end inserts in the endoporus of described annular gear ring 3, and is meshed with the internal tooth of its endoporus.Described annular gear ring 3 is threaded in the tapped bore 2-2b-3 of described the second end cap 2-2b by its periphery, and screw thread do not screw, and leaves the pitch of a fixing turn (as one to two circle).That is to say, described torsion bar 3 one end are meshed by interior external tooth with described the first end cap 2-2a, and the other end screws with described the second end cap 2-2b mutually by annular gear ring 3.
Described spool 2 is wholy set among described framework 1, and as shown in fig. 1, on spool 2, two end cap is placed in respectively among the through hole of framework 1 sidewall.When free state, rotatable the floating of described spool 2 is arranged among described taking-up device framework 1, and the external tooth on its end cap does not contact with the internal tooth of through hole on 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 in the time of locking, the external tooth of described spool 2 two end cap is meshed with relevant position internal tooth on described framework 1, spool 2 cannot rotate.
The taking-up device working process of the present embodiment is as follows: in the time bumping, ribbon drives described mandrel 2-1 rotation, and engage with the internal tooth of mandrel 2-1 by the circumferential external tooth at middle part at torsion bar 3 middle parts, makes its pulling force that bears ribbon, drives torsion bar 3 to rotate.And due in the time that ribbon is strained, the two end cap of mandrel 2-1 can be locked on framework, wherein the first end cap 2-2a is meshed with a wherein end cap of torsion bar 3, make this end of torsion bar be fixed and cannot rotate, the other end screws with the second end cap mutually by the annular gear ring being engaged with, and retains the pitch of a fixing turn and rotatable.That is to say, in the time that the pulling force of ribbon reaches the first limiter value, the end of engaging with the first end cap 2-2a maintains static, and all can there is certain rotation with end and whole torsion bar that the second end cap 2-2b screws mutually, this makes the stressed and distortion that twists of the first bar section 3a of torsion bar 3, and then makes mandrel 2-1 that the rotation of certain angle, release portion ribbon occur, the torsional deformation characteristic of this torsion bar 3 can suitably be emitted ribbon, realizes first order limiter.Along with ribbon continues mandrel to apply pulling force, torsion bar 3 is screwed with the end thread that the second end cap 2-2b screws mutually, these torsion bar 3 ends no longer rotate, in the time that ribbon pulling force reaches the second limiter value, the second bar section 3b starts stressed, now, the first bar section 3a and the second bar section 3b are simultaneously stressed, all rotate, ribbon is released again a part, thereby has realized second stage limiter.Because the limiter value of first order limiter is determined by the first bar section 3a, and the limiter value of second stage limiter is determined by the first bar section 3a and the second bar section 3b simultaneously, therefore second stage limiter value is greater than first order limiter value, the spool of the present embodiment has been realized incremental limiter.The safety device of incremental limiter for example,, under the situation that does not have other safety measures (safety air bag) to protect simultaneously, has the meaning of particular importance.The position that for example automobile rear passenger, or child seat etc. generally do not install safety air bag, is used the safety strap of above-mentioned incremental limiter can play better protective effect.Reason is: do not have rear row under the situation of safety air bag, while crashing, leaning forward of the large distance of passenger of can not leaving, need to be after less one-level limiter release portion ribbon, increase limiter value, when ribbon is drawn out, need to overcome larger torsion, the distance leaning forward to limit passenger, avoid other position of impact front seat or automobile, less one-level limiter is avoided the damage of binding force to human body that can be excessive.
In addition, in the present embodiment, torsion bar 3 is sectional type, and its effective length of two sections can be different.Described effective length refers to the axial length of the part outside torsion bar or bar section removal external tooth place, both ends shaft part.The diameter of described two sections of torsion bars and material also can be different.The torsion bar of segmentation can reduce manufacture difficulty, reduces manufacturing cost.In addition, be also convenient to be combined into the limiter effect of different torsion grades.
In the above-described embodiment, described torsion bar 3 ends screw and are connected with the second end cap 2-2b by being engaged with annular gear ring 8.In other embodiment of the present invention, can also be described annular gear ring 8 and described the second end cap 2-2b be set to one-body moldedly, or this annular gear ring 8 is not set, and directly in torsion bar 3 these ends, the outside thread matching with tapped bore 2-2b-3 is set.Certainly, this can increase the manufacture difficulty of torsion bar 3 to a certain extent.
In this external other embodiment of the present invention, described torsion bar 3 can be also sectional type, and it can be also integral type, as shown in Figure 6.Here repeat no more.
In addition, it should be noted that, in the above embodiments, do not stretch out vertically mandrel both sides end cap taking torsion bar and describe as example.But it will be appreciated by those skilled in the art that, the torsion bar in the taking-up device of recording in the application's background technology also can be applied to this, now, described torsion bar length is vertically greater than described spool in axial length.End cap central authorities need be set to be with internal thread hole through hole (for the second end cap) or band internal tooth through hole (for the first end cap) accordingly.Here no longer launch to discuss.
The present invention also protects a kind of safety strap assembly, and this safety strap assembly has used taking-up device described in above-described embodiment, and can obtain the beneficial effect that the taking-up device of above-described embodiment brings.Taking-up device can be referring to existing technology to the assembling of ribbon and other relevant spare and accessory parts, no longer launches here to discuss.
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, therefore protection scope of the present invention should be as the criterion with the scope that the claims in the present invention were defined.
Claims (10)
1. for a taking-up device for safety strap, it is characterized in that, comprising: taking-up device framework, spool and torsion bar; Wherein,
Described taking-up device framework comprises two relative sidewalls; In described two side, opposite position is provided with the circular port with internal tooth section; Described tooth section is arranged at position corresponding to the outside lead of ribbon.
Spool comprises and is provided with through hole along axis and for being wound around the mandrel of ribbon and being arranged at the separation type end cap at mandrel two ends; On described end cap along periphery be provided with described taking-up device framework on the external tooth that matches of internal tooth section;
Described torsion bar is shaft-like, and it is arranged among spool through hole along spool axis, and both ends at least extend to the end cap of mandrel both sides; The external tooth that described torsion bar arranges at described spool axis middle part engages with the internal tooth of mandrel middle part setting, is engaging by gear with the crossover location of an end cap wherein with this end cap, and this end cap is called the first end cap; Mutually screwing by internal and external threads and this another end cap with the crossover location of another end cap, this another end cap is called the second end cap;
Under free state, rotatable the floating of described spool is arranged in described taking-up device framework, and two end cap is placed in the circular port of the two side of described taking-up device framework, and between described torsion bar and described the second end cap, internal and external threads does not screw; In the time of locking, the external tooth of described spool two end cap is meshed with the internal tooth section on described framework.
2. the taking-up device for safety strap according to claim 1, is characterized in that, also comprises that periphery arranges outside thread and endoporus and arrange the annular gear ring of internal tooth,
Be provided with the tapped bore matching with described annular gear ring periphery screw thread towards the end face side central authorities of described mandrel at described the second end cap;
Be provided with the external tooth matching with described annular gear ring internal tooth in the end corresponding to this second end cap of described torsion bar;
After assembling, the external tooth of described torsion bar end is placed in described annular gear ring, and described annular gear ring screws in the tapped bore of described the second end cap.
3. the taking-up device for safety strap according to claim 2, is characterized in that, the axial length of described torsion bar is not more than the axial length of described spool;
The shrinkage pool that is set to have internal tooth at described the first end cap towards the end face side central authorities of described mandrel, the respective end of described torsion bar is provided with the circumferential external tooth matching with described shrinkage pool;
The described tapped bore arranging on described the second end cap is blind hole.
4. according to the taking-up device for safety strap described in claims 1 to 3 any one, it is characterized in that two side lever sections of the external tooth that described torsion bar axis middle part arranges effective length difference in the axial direction.
5. according to the taking-up device for safety strap described in claims 1 to 3 any one, it is characterized in that, described torsion bar is axially being split up into two sections that are docking together, and the two ends of each section of torsion bar are provided with external tooth, and the external tooth profile of tooth of two sections of torsion bar docking ends aligns; The common external tooth that forms the setting of described middle part of circumferential external tooth of described two sections of torsion bars docking end.
6. the taking-up device for safety strap according to claim 5, is characterized in that, two sections of described torsion bar have respectively different diameters and/or different materials.
7. the taking-up device for safety strap according to claim 1 and 2, is characterized in that, described torsion bar length is vertically greater than described spool in axial length; The through hole that is set to have internally toothed annulus at described the first end cap towards the end face side central authorities of described mandrel, the respective end of described torsion bar is provided with the circumferential external tooth matching with described shrinkage pool;
The described tapped bore arranging on described the second end cap is through hole.
8. an end cap, is applied to the taking-up device described in the claims 1 to 7 any one, it is characterized in that, described end cap is flat cylindrical, and tapped center shrinkage pool is set in the center of one end side; Circumferential whole circle along described end cap is provided with external tooth.
9. an annular gear ring, is applied to the taking-up device described in the claims 2 to 7 any one, it is characterized in that, described annular gear ring periphery is provided with outside thread, and endoporus is along being circumferentially provided with internal tooth.
10. a safety strap assembly, is characterized in that, uses the Webbing retractor described in the claims 1 to 7 any one.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032779.0A CN103963737B (en) | 2013-01-29 | 2013-01-29 | Coiler, end cap, annular gear ring and seat belt assembly for seat belt |
| 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 |
|---|---|---|---|
| CN201310032779.0A CN103963737B (en) | 2013-01-29 | 2013-01-29 | Coiler, end cap, annular gear ring and seat belt assembly for seat belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103963737A true CN103963737A (en) | 2014-08-06 |
| CN103963737B CN103963737B (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310032779.0A Expired - Fee Related CN103963737B (en) | 2012-08-27 | 2013-01-29 | Coiler, end cap, annular gear ring and seat belt assembly for seat belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103963737B (en) |
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| CN104842929A (en) * | 2015-04-30 | 2015-08-19 | 宜兴市奥华汽配有限公司 | Gear tube component |
| CN107757550A (en) * | 2017-12-08 | 2018-03-06 | 沈阳金杯锦恒汽车安全系统有限公司 | A kind of pretension limit type automobile safety belt retractor |
| CN113183915A (en) * | 2020-11-18 | 2021-07-30 | 上海和励信息科技有限公司 | Coiler and motor drive's coiler |
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| CN113183915B (en) * | 2020-11-18 | 2023-05-09 | 上海和励信息科技有限公司 | Retractor and motor-driven retractor |
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| CN103963737B (en) | 2016-12-28 |
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Effective date of registration: 20180403 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: 20140806 Assignee: ZHEJIANG SONGYUAN AUTOMOTIVE SAFETY SYSTEMS CO.,LTD. Assignor: He Li Technology Co.,Ltd. Contract record no.: 2018990000336 Denomination of invention: Safety belt winder, end cap, annular tooth ring and safety belt assembly Granted publication date: 20161228 License type: Common License Record date: 20181207 |
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