CN102837664A - Retractor for safety belt and safety belt assembly - Google Patents
Retractor for safety belt and safety belt assembly Download PDFInfo
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- CN102837664A CN102837664A CN201210309066XA CN201210309066A CN102837664A CN 102837664 A CN102837664 A CN 102837664A CN 201210309066X A CN201210309066X A CN 201210309066XA CN 201210309066 A CN201210309066 A CN 201210309066A CN 102837664 A CN102837664 A CN 102837664A
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Abstract
The invention provides a retractor for a safety belt. A retractor frame comprises two opposite side walls, and corresponding positions of the two opposite side walls are provided with round holes with inner tooth sections. The tooth sections are arranged at a position corresponding to the outward traction direction of a braided belt. A retraction shaft comprises a core shaft which is provided with a though hole along the central axis and is used for winding the braided belt, and two separating end covers which are respectively installed at two ends of the core shaft. The periphery of each end cover is provided with outer teeth matched with inner teeth on the frame. A torsion bar is bar-shaped, the axial middle of the torsion bar is provided with a middle section of outer teeth, and the inner teeth matched with the outer teeth are installed in the though hole of the core shaft. Connection between the torsion bar and the two separating end covers at two ends is achieved at a crossing position between the torsion bar and the two separating end covers through a gear installed at the crossing position and gears correspondingly installed at the end covers. The retractor for the safety belt overcomes the shortcoming that the position of the locking of a retractor is unfixed, and improvement of control accuracy of the retractor is benefited. The invention further provides a safety belt assembly.
Description
Technical field
The present invention relates to the safety strap technology, be specifically related to a kind of taking-up device that is used for safety strap.The present invention relates to a kind of safety strap assembly that uses said taking-up device 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 the standard body-restraining seat belt on the automotive seat, and it only comprises lockable mechanism and the ribbon that is used for fixing 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, it is very big to make that ribbon acts on user's power on one's body, 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; Proposed the limit type safety strap,, can act on the power on the human body through certain limit force mechanisms restriction ribbon promptly in impact moment; Can not cause human body to receive the injury of ribbon itself, to reach the purpose of protecting the user to greatest extent.
At document number is in the european patent document of EP1607288B1, discloses a kind of safety device that is used for the limit type safety strap.Concrete, in second embodiment of said european patent document, disclosed safety device comprises a U type framework, spool and torsion bar.On the relative two side of said U type framework, be provided with the circular port of band internal tooth.Spool comprises the mandrel and the separation type end cap that is arranged at the mandrel two ends that is used to twine ribbon.Said end cap be provided with framework on the external tooth that is complementary of internal tooth; When not bumping; Rotatable the floating of said spool is arranged on the said U type framework; And two end cap is arranged at respectively in the circular port of said U type framework, and under normal condition, the external tooth on the end cap and the internal tooth of said circular port do not mesh; Spool can rotate in said circular port, to twine ribbon or to discharge ribbon.
Said torsion bar is shaft-like, is arranged among the spool along said spool axis, and connects through interior external tooth engagement system along the axis centre position at said spool; In addition, said two end cap center is passed at said torsion bar two ends, stretches out outside the end cap and is meshed with internal tooth on the two end cap through external tooth.
Above-mentioned limit type erecting device working process is following: when bumping; End instr triggers the actuating mechanism that comprises gas generator; Promote spool and be pushed to engage position from the floating position; External tooth on the end cap of spool is meshed with the internal tooth of U type framework, and spool becomes lockup state by rotatable quick condition (also can be described as free state).Make the ribbon that is wrapped on the spool no longer outwards discharge.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 through being engaged with, be fixed on the U type framework with torsion bar ingear end cap and can't rotate.When the tractive force of ribbon can make greatly that enough torsion bar produces the distortion rotation; The rotation of certain angle will take place in mandrel; Thereby make ribbon can be released out a segment length, and then make the user can produce certain displacement forward, alleviate ribbon and act on user's pulling force on one's body; Reach the effect that ribbon acts on user's power on one's body that limits, obtained limit power effect.
The key character of above-mentioned patent is that the torsion bar two ends are fixed, and the stage casing is through interior external tooth engagement mandrel; Make torsional deflection be evenly distributed on the whole torsion bar; Prevent stress raisers and rupture, and can make full use of the material of torsion bar, produce the limit power 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.
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 circumferential internal tooth that is provided with on its frame wall with circumferential external tooth on the end cap of spool and U-shaped framework matches and carries out locking, and its lock position is unfixing, possibly appear at circumferential a plurality of positions; Produce uncertainty when this makes this taking-up device locking, be difficult to accurate control.Also has improved space.
Summary of the invention
The present invention provides a kind of taking-up device that is used for safety strap, to solve the above-mentioned problem of existing Webbing retractor.The present invention provides the safety strap assembly that uses said taking-up device in addition.
The taking-up device that is used for safety strap provided by the invention comprises: taking-up device framework, spool and torsion bar; Wherein,
Said taking-up device framework comprises two relative sidewalls; Opposite position is provided with the circular port of band internal tooth section in said two side; Said tooth section is arranged at the cooresponding position of the outside lead of ribbon;
Spool comprises and is provided with the mandrel through hole along the axis and is used to twine the mandrel of ribbon and is arranged at two separation type end caps at above-mentioned mandrel two ends respectively; Along the periphery of said end cap be provided with said framework on the external tooth that is complementary of internal tooth;
Said torsion bar is shaft-like, and among being arranged at said mandrel through hole along the spool axis, its both ends extend to the mandrel end covers at two sides at least; Said torsion bar is provided with the stage casing external tooth at axial middle part, and the corresponding ingear internal tooth with this external tooth of the setting in the said mandrel through hole makes this torsion bar and is connected with mandrel through aforementioned external teeth and internal tooth; This torsion bar and said two end cap crossover location, the corresponding gear that is provided with on gear through being arranged on this position and the end cap is realized being connected of separation type end cap at torsion bar and two ends;
Under free state, rotatable the floating of said spool is arranged in the said taking-up device framework, and two end cap places the circular port of the two side of said taking-up device framework; When locking, the external tooth of said spool two end cap is meshed with internal tooth on the said framework.
Preferably, said torsion bar with being connected of separation type end cap at two ends adopt following structure: at the medial surface towards mandrel of end cap, its end face center be provided with the band internal tooth the center shrinkage pool; Insert among the center shrinkage pool of this end cap the said torsion bar termination that cooperates with this end cap, and the torsion bar termination is provided with the end external tooth, is provided with internal tooth in the center shrinkage pool of said end cap inner end surface, and both are meshed.
Preferably, on the stage casing external tooth at said torsion bar middle part corresponding to pass on the mandrel and fixedly the hold down groove of belt-strap end be provided with and dodge tooth and lack; The end external tooth of one end thereof setting upwards was provided with anti-side set and lacks with the above-mentioned cooresponding position of tooth phase shortage of dodging in week; Accordingly, be provided with on the scarce cooresponding end cap in torsion bar end of anti-side set, on the internal tooth of the center shrinkage pool of its medial surface, the breach structure that cooperates with said anti-side set phase shortage be set with this.
Preferably, the external tooth profile of tooth in the middle part of said torsion bar is positioned at is to the sloped-end that the mistake proofing breach is set.
Preferably, the two sectional type structure of said torsion bar for separating from axial middle part; Said stage casing external tooth promptly is positioned at two sections ends that connect.
Preferably, two of said torsion bar sections have different diameters and/or different materials respectively.
Preferably, all be provided with on the circumferential external tooth of two sections the end that connects of said torsion bar and dodge hypodontia, two to dodge position that tooth lacks identical and jointly corresponding to passing on the mandrel and the fixing hold down groove of ribbon end.
Preferably, in the mandrel both sides, every side is provided with two force limit pins at least; This force limit pin is fixed on the end face of said mandrel, and insertion end covers in the pin-and-hole that should the force limit pin position be provided with, and perhaps, this force limit pin is fixed on the said end cap, and inserts on the mandrel end face pin-and-hole to should the force limit pin position being provided with.
Preferably, two force limit pins at said mandrel two ends are provided with the position in the fixing angle that upwards staggers in week.
Preferably, the seam that the adjacent end face setting of mandrel and end cap cooperatively interacts, the seam position is provided with wear ring.
Preferably, said each end cap be provided with annular boss towards mandrel one side outer, be provided with in said mandrel both ends of the surface and said annular boss relevant position and dodge seam.
Preferably, in said two end caps, wherein end cap outside end face is provided with the projecting shaft that matches with wind spring, and another end cap external side end face is provided with the projecting shaft that cooperates with end instr.
The present invention provides a kind of safety strap assembly simultaneously, and this safety strap assembly uses the described taking-up device of above-mentioned each technical scheme.
Compared with prior art, Webbing retractor provided by the invention has the following advantages:
In the through hole of taking-up device of the present invention with framework the internal tooth section is set, rather than whole circle is established tooth.And the position of internal tooth section is arranged at the cooresponding position of the outside lead of ribbon; Through said position the internal tooth section is set, the lock position of taking-up device is fixed on the position that the internal tooth section is set.Overcome the unfixed problem of taking-up device lock position in the background technology, helped improving accuracy, thereby can improve the stability that comprises with the safety strap use of this taking-up device taking-up device control.
In optimal technical scheme of the present invention, 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, 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 in this Webbing retractor, is set at the end cap outside replaces.When bumping, ribbon drives said mandrel rotation, and drives the torsion bar rotation through 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, makes torsion bar to rotate.At this moment, torsion bar bears the twisting resistance that increases sharply, when this twisting resistance is enough big, and the deformation that can twist of this torsion bar, the strength that makes the rotation of mandrel generation certain angle, release portion ribbon, ribbon act on the safety strap user health is minimized.The torsion bar length that the present invention adopts shorter than in the background technology; And do not stretch out vertically outside the end cap, this makes that torsion bar is difficult for occuring bending and deformation, and is not come from outside the end cap of both sides other and retrain; The whole force-bearing situation of torsion bar is oversimplified, and use 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 satisfy special torsion requirement, its cost is high, makes and requires height, and the present invention adopts short torsion bar can also practice thrift cost.
In another optimal technical scheme of the present invention; With respect to background technology; The present invention is provided with boss in the inboard of separation type end cap and inserts the structure in the cooresponding seam of mandrel; Can bear the ribbon tractive force and be delivered on the framework, can further avoid torsion bar to bear the ribbon tractive force and occur bending and deformation; The boss of the both sides end cap of this Webbing retractor and the seam setting at mandrel two ends; The ribbon tractive force is delivered on the framework; Guarantee that torsion bar only bears the twist moment that comes from mandrel and the reaction torque of end cap; Force-bearing situation is simple and controlled, can obtain more consistent limit power effect, and is in use safer stable.
In another optimal technical scheme of the present invention, also between the mandrel of taking-up device and end cap, be provided with force limit pin, the pulling force that this force limit pin bears at mandrel ruptures during greater than a predetermined value.Before the fracture, mandrel transmits torsion through force limit pin to end cap; After the force limit pin fracture, just transmit torsion to end cap by torsion bar.Because it is more constant that the limit power value of fracture takes place force limit pin, makes this structure can obtain stable limit power effect.
In another optimal technical scheme of the present invention, the torsion bar of taking-up device is divided into coaxial two sections; The combination of the torsion bar section of two same diameter or different-diameter is used, capable of being combinedly gone out a plurality of torque values, thereby can form in the taking-up device with a plurality of limit power values, can satisfy the demands of different of different automobile vendors safety strap limit power value; In addition, because torsion bar is to adopt special substance and process through cold heading technique, for the torsion bar of each diameter, all independent mould will be arranged, the price of its manufacturing equipment and mould is all very expensive; Adopt the two sectional type torsion bar, can realize obtaining the torsion bar section of using less processing mold to process the limit power value of a plurality of requirements through array mode, thereby can reduce die sinking quantity, practice thrift manufacturing cost.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the taking-up device that is used 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 scheme drawing of torsion bar in the taking-up device of first embodiment of the 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 inserts the scheme drawing that its outer toothed portion matches with the mandrel through hole in the mandrel for the torsion bar that the middle part external tooth has the hypodontia mouth;
Figure 11 and Figure 12 show the block diagram and the section-drawing of torsion bar respectively;
Figure 13 is the exploded view of reel unit and torsion bar assembling in the second embodiment of the present invention;
Figure 14 is two sectional type diameter for torsion bar in second embodiment of the present invention when identical and the generalized section of other parts of spool when being assembled into one;
Generalized section when Figure 15 is not assembled into one with other parts of spool simultaneously for two sectional type diameter for torsion bar in the second embodiment of the present invention.
The specific embodiment
A lot of details have been set forth in the following description so that make much of 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 do similar popularization under the situation of intension of the present invention, so the present invention does not receive the restriction of following disclosed practical implementation.
First embodiment
Fig. 1 is the structural representation of first embodiment of the taking-up device that is used for safety strap of the present invention, and 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.
Please referring to Fig. 1, in the present embodiment, taking-up device comprises taking-up device framework 1, spool 2 and torsion bar 3 (shown in Fig. 4)
Wherein, said taking-up device framework 1 is the U type, 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 the said the first side wall 1-1 and the second sidewall 1-2.Opposite position is respectively arranged with the circular first through hole 1-1a and the second through hole 1-2a on the said the first side wall 1-1 and the second sidewall 1-2, and same position is provided with internal tooth section 1-3 (only showing the situation that the internal tooth section is set on the second through hole 1-2a among Fig. 1) on said two through hole.Said internal tooth section 1-3 be used for spool on external tooth match the spool locking, so the position that is provided with of said internal tooth section 1-3 is the pairing position of lead that is wound in the ribbon on the spool.In the framework shown in said Fig. 1, outwards being drawn by said the 3rd wall 1-4 inside top of ribbon is so said internal tooth section 1-3 is arranged at the two through hole top.Through said position the internal tooth section is set, the lock position of taking-up device is fixed on the position that the internal tooth section is set.Overcome the unfixed problem of taking-up device lock position in the background technology, helped improving accuracy, thereby can improve the stability that comprises with the safety strap use of this taking-up device taking-up device control.
On said framework 1, also be provided with other structure, for example interface of the strengthening rib of the lightening hole on the two side, connection two side or the like is given unnecessary details here no longer one by one.
Please referring to Fig. 2,3 and 4, said spool 2 comprises mandrel 2-1 and the separable end cap that is arranged at said mandrel 2-1 two ends: left side end cap 2-2a and right side end cap 2-2b.Said mandrel 2-1 is used to twine belt-strap, and it can twine ribbon on it along its axis rotation and maybe the ribbon that twines discharged.Said 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 said mandrel 2-1, be provided with two outwardly directed pin 2-6 respectively, be called force limit pin 2-6.
On said mandrel 2-1, also be provided with and be used to pass and fixedly the prolate type hold down groove 2-4 of ribbon end and the loss of weight groove 2-5 that is used for loss of weight.
The periphery of said two end cap is provided with external tooth; As shown in Figure 4; Left side end cap 2-2a periphery is provided with external tooth 2-2a-1, and the periphery of end cap 2-2b is provided with external toothing 2-2b-1 on the right side, and the tooth on the said 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 said two end cap periphery and said framework 1.
In said two end cap position corresponding to said 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 at both ends lid mode as shown in Figure 2 was arranged at said mandrel 2-1 both ends of the surface side, force limit pin inserted in the corresponding pin-and-hole.In addition, also can force limit pin be arranged at the end cap inboard, and pin-and-hole be set in mandrel 2-1 end face relevant position.The main function of this force limit pin 2-6 is to bear the mandrel shearing force in when rotation, and when this shearing force reaches a threshold value, ruptures, thereby makes torsion bar 3 just play effect during greater than a fixed value at binding force.Said force limit pin can be different in the position that is provided with at mandrel two ends, and location when being used in end cap and mandrel 2-1 assembling whereby prevents left and right sides end cap loading error.After the position of above-mentioned force limit pin can also make assembling; The external tooth of two ends end cap is in certain angle that circumferentially staggers; Taking-up device has certain crooked situation in the actual condition so that the engagement of the circular port internal tooth of both sides end cap and frame side wall more meets, and two end cap is all effectively meshed with framework.
Also be provided with the center shrinkage pool (hereinafter to be referred as shrinkage pool) of being 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 said 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 mandrel end face then is provided with the seam that holds this boss.
The end face in the outside of said two end cap (promptly away from mandrel 2-1 end face) side is 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.
In the present embodiment, described taking-up device also comprises torsion bar 3 as shown in Figure 4, and said torsion bar 3 is shaft-like, circumferentially is provided with external tooth at its two ends and edge, middle part, is called end external tooth and middle part external tooth respectively.
Torsion bar 3 and said spool 2 structures are like Fig. 2, shown in 3 and 4, and torsion bar 3 is inserted through among the mandrel through hole 2-3 of said mandrel 2-1, and the middle part external tooth at its axial middle part is meshed with the internal tooth of the mandrel through hole 2-3 inwall setting of said mandrel 2-1.Left side end cap 2-2a and right side end cap 2-2b are 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.Insert respectively among the shrinkage pool of said left and right sides end cap at the two ends of said torsion bar 3, 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 seam of the boss of said two end cap and mandrel 2-1, also be provided with wear ring 4b.This wear ring 4b generally adopts low-friction plastic to process; 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 that makes the seam position can direct contact, has avoided gummed effect that the mutual friction of metal covering phase the causes influence to the torsion bar normal operation.
As shown in 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 said mandrel 2-1; Frictional area when rotating relatively through annular boss being set and dodging fixing structure, can reducing mandrel 2-1 end face and end cap, thus the friction force between mandrel and the end cap reduced, improve the stability of limit power effect.
In the taking-up device of 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 present embodiment.The projecting shaft that the part that is shortened is set at the end cap outside replaces.When bumping, two end cap is locked on the framework, and two end cap meshes the both ends of torsion bar simultaneously, makes the both ends of torsion bar to rotate.And the circumferential external tooth at middle part and the internal gearing of mandrel 2-1 are passed through in torsion bar 3 middle parts, and the pulling force of ribbon is carried on the torsion bar 3 through this meshing relation; When the pulling force of ribbon reaches certain degree; The deformation that twists of this torsion bar 3; Thereby make mandrel 2-1 that the rotation of certain angle take place, 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, avoided the damage of excessive binding force human body to the binding force of human body; Simultaneously, ribbon can not be emitted long distance again and caused the inefficacy to the human body constraint.
In the present embodiment; Because the torsion bar contraction in length, and the seam setting of 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 limit power 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 left and right sides is born half the limit power value respectively, can reduce the required diameter of torsion bar.Because the material of torsion bar need satisfy special torsion requirement, its cost is high, makes and requires height, adopts short torsion bar can obviously practice thrift cost in the present embodiment.
In addition, in the above embodiment of the present invention, internal tooth section 1-3 is set on the through hole of said taking-up device framework, and the position of internal tooth section 1-3 is the pairing position of lead that is wound in the ribbon on the spool.Put in order the structure that circle all is provided with internal tooth with respect to through hole, the structure of present embodiment can guarantee that spool is locked in definite position when locking, and the position of internal tooth section 1-3 promptly is set.
Secondly; In the embodiments of the invention, the force limit pin 2-6 that is provided with at the mandrel two ends of said spool 2 as stated, when spool 2 lockup states; Mandrel 2-1 is owing to receive the pulling force from belt-strap; Can produce rotation trend by relative both sides end cap, and said force limit pin 2-6 can at first stop its rotation, and bear the shearing force between end cap and the 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 said mandrel 2-1 is born is carried on the force limit pin 2-6, this tractive force is not born or mainly do not born to said 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 through mandrel 2-1 is born in torsion bar 3 beginning fully, and then the torsional deflection process of torsion bar 3 just can take place.So limit power threshold value that force limit pin 2-6 can regulate this safety strap.
In the present embodiment, the external tooth at said torsion bar 3 middle parts is provided 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 dodges the scarce 3-1-1 of tooth for the middle part external tooth has torsion bar inserts the scheme drawing that its outer toothed portion matches with the mandrel through hole among the mandrel 2-1.Can find out by Figure 10; The said tooth of dodging lacks 3-1-1 after the position that is provided with 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 goes up that being used to of being provided with passes and the fixing hold down groove 2-4 of ribbon 6.This hold down groove 2-4 is a prolate type through hole, and it is provided with and satisfies ribbon and pass the center shaft of direction perpendicular to said mandrel 2-1, and needs as much as possible near said center shaft.Saidly dodge tooth to lack 3-1-1 be that ribbon 6 passes hold down groove 2-4 and provides and let bit space; Cause ribbon 6 and this interference of tooth to avoid teeth being set at this place; 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) is provided with anti-side set and lacks 3-2b-1, and opposite side then needn't be provided with this hypodontia mouth.Accordingly, the shrinkage pool on the spool end cap of this end also need be provided with 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, is provided with.The reason that the scarce 3-2b-1 of above-mentioned anti-side set is set is that owing to exist the above-mentioned tooth of dodging to lack 3-1-1, said torsion bar 3 must insert the through hole 2-3 of mandrel with suitable angle, and the scarce 3-2b-1 of anti-side set inserts the once success of operation of torsion bar 3 in the time of can guaranteeing 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 is provided with, 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 of right ends different, and then can cause the torsion that bear at two ends when 3 distortions of torsion bar bar no longer identical.For this reason, address this problem through following mode among the present invention.
External tooth 3-1 end 3-2b (end of mistake proofing the breach promptly is set) inclination to the right that torsion bar 3 is positioned at the middle part is set,, 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 the block diagram and the section-drawing of torsion bar 3 respectively, can find out tooth 3-1-2 bevelled situation by Figure 11 and Figure 12.Tilt to the right through external tooth 3-1 is set, help balance mandrel 2-1 and put on the power on this torsion bar 3, make its whole stress balance.
Need to prove that in the above embodiments one, not stretching out mandrel both sides end cap vertically with torsion bar is that example describes.But it will be appreciated by those skilled in the art that the torsion bar in the taking-up device of being put down in writing in the application's background technology also can be applied to this, corresponding end cap center is provided with through hole.Here no longer launch to discuss.
Second embodiment
Different is for taking-up device in the present embodiment and above-mentioned first embodiment, and torsion bar wherein is two sectional type structure separately, the exploded view that reel unit as shown in Figure 13 and torsion bar assemble.
Torsion bar comprises two sections of coaxial setting: first section 3a and second section 3b.Described two sections axial lengths are identical, in the end of each section external tooth are set all vertically.When group was one, two sections torsion bars wherein were docking together at two ends, and end face connects, and the external tooth teeth of opposite end are corresponding, not side set.The external tooth integral body at the two ends that connect is equivalent to the circumferential external tooth at the middle part of torsion bar among first embodiment.Its effect and identical with above-mentioned first embodiment with the connection mode of mandrel.Insert respectively in the shrinkage pool of end cap of spool at the other two ends of two sections torsion bars, and connection mode is identical with what put down in writing among above-mentioned first embodiment, repeats no more here.In addition, on said two sections torsion bars connect the external tooth of end, all be provided with and dodge tooth and lack, and two dodge the tooth omission and put identical and jointly corresponding to passing on the mandrel and the fixing hold down groove of ribbon end.This dodge tooth lack with said first embodiment in the tooth of dodging of torsion bar middle part external tooth lack and act on identically, repeat no more here.Other part in the present embodiment except that torsion bar is identical with the first above-mentioned embodiment.
Torsion bar is set to discrete two sections and has following effect: can the torsion bar section combination of two same diameter or different-diameter be used; Capable of being combinedly go out a plurality of limit power values; Thereby can adopt less torsion bar to form taking-up device, satisfy the demands of different of different automobile vendors safety strap limit power value with a plurality of limit power values.Show the scheme drawing of same diameter torsion bar section and different-diameter torsion bar Duan Zuwei torsion bar respectively like Figure 14 and 15.In addition, also can use the torsion bar combination of identical material or unlike material to use, can obtain different limit power effects equally.
In addition, because torsion bar is to adopt special substance and process through cold heading technique, for the torsion bar of each diameter, all independent mould will be arranged, its manufacturing equipment and mould are expensive.Adopt the two sectional type torsion bar of present embodiment, can realize that the torsion bar section that limited processing mold processes is combined into the torsion bar with a plurality of limit power values, thereby can reduce die sinking quantity, practice thrift manufacturing cost.And 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 lower relatively.
In addition, the material that changes the torsion bar section can be used with the change diameter simultaneously, to be combined into more changeableization.Here repeat no more.
The present invention also protects a kind of safety strap assembly, and this safety strap assembly has used the said taking-up device of the foregoing description, and can obtain the beneficial effect that taking-up device brought of the foregoing description.Taking-up device can no longer launch to discuss referring to existing technology with the assembling of ribbon and other relevant spare and accessory parts here.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away 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 (13)
1. a taking-up device that is used for safety strap is characterized in that, comprising: taking-up device framework, spool and torsion bar; Wherein,
Said taking-up device framework comprises two relative sidewalls; Opposite position is provided with the circular port of band internal tooth section in said two side; Said tooth section is arranged at the cooresponding position of the outside lead of ribbon;
Spool comprises and is provided with the mandrel through hole along the axis and is used to twine the mandrel of ribbon and is arranged at two separation type end caps at above-mentioned mandrel two ends respectively; Along the periphery of said end cap be provided with said framework on the external tooth that is complementary of internal tooth;
Said torsion bar is shaft-like, and among being arranged at said mandrel through hole along the spool axis, its both ends extend to the mandrel end covers at two sides at least; Said torsion bar is provided with the stage casing external tooth at axial middle part, and the corresponding ingear internal tooth with this external tooth of the setting in the said mandrel through hole makes this torsion bar and is connected with mandrel through aforementioned external teeth and internal tooth; This torsion bar and said two end cap crossover location, the corresponding gear that is provided with on gear through being arranged on this position and the end cap is realized being connected of separation type end cap at torsion bar and two ends;
Under free state, rotatable the floating of said spool is arranged in the said taking-up device framework, and two end cap places the circular port of the two side of said taking-up device framework; When locking, the external tooth of said spool two end cap is meshed with internal tooth on the said framework.
2. the taking-up device that is used for safety strap according to claim 1 is characterized in that,
Said torsion bar with being connected of separation type end cap at two ends adopt following structure: at the medial surface towards mandrel of end cap, its end face center be provided with the band internal tooth the center shrinkage pool; Insert among the center shrinkage pool of this end cap the said torsion bar termination that cooperates with this end cap, and the torsion bar termination is provided with the end external tooth, is provided with internal tooth in the center shrinkage pool of said end cap inner end surface, and both are meshed.
3. the taking-up device that is used for safety strap according to claim 2 is characterized in that, on the stage casing external tooth at said torsion bar middle part corresponding to pass on the mandrel and fixedly the hold down groove of belt-strap end be provided with and dodge tooth and lack; The end external tooth of one end thereof setting upwards was provided with anti-side set and lacks with the above-mentioned cooresponding position of tooth phase shortage of dodging in week; Accordingly, be provided with on the scarce cooresponding end cap in torsion bar end of anti-side set, on the internal tooth of the center shrinkage pool of its medial surface, the breach structure that cooperates with said anti-side set phase shortage be set with this.
4. the taking-up device that is used for safety strap according to claim 3 is characterized in that: said 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 taking-up device that is used for safety strap according to claim 1 is characterized in that: the two sectional type structure of said torsion bar for separating from axial middle part; Said stage casing external tooth promptly is positioned at two sections ends that connect.
6. the taking-up device that is used for safety strap according to claim 5 is characterized in that: two sections of said torsion bar have different diameters and/or different materials respectively.
7. the taking-up device that is used for safety strap according to claim 5; It is characterized in that: all be provided with on the circumferential external tooth of two sections the end that connects of said torsion bar and dodge hypodontia, two to dodge position that tooth lacks identical and jointly corresponding to passing on the mandrel and the fixing hold down groove of ribbon end.
8. the taking-up device that is used for safety strap according to claim 1 is characterized in that: in the mandrel both sides, every side is provided with two force limit pins at least; This force limit pin is fixed on the end face of said mandrel, and insertion end covers in the pin-and-hole that should the force limit pin position be provided with, and perhaps, this force limit pin is fixed on the said end cap, and inserts on the mandrel end face pin-and-hole to should the force limit pin position being provided with.
9. the taking-up device that is used for safety strap according to claim 8 is characterized in that: two force limit pins at said mandrel two ends are provided with the position in the fixing angle that upwards staggers in week.
10. the taking-up device that is used for safety strap according to claim 1 is characterized in that: the seam that the adjacent end face setting of mandrel and end cap cooperatively interacts, the seam position is provided with wear ring.
11. the taking-up device that is used for safety strap according to claim 1 is characterized in that: said each end cap be provided with annular boss towards mandrel one side outer, be provided with in said mandrel both ends of the surface and said annular boss relevant position and dodge seam.
12. the taking-up device that is used for safety strap according to claim 1 is characterized in that: in said two end caps, wherein end cap outside end face is provided with the projecting shaft that matches with wind spring, and another end cap external side end face is provided with the projecting shaft that cooperates with end instr.
13. a safety strap assembly is characterized in that, uses aforesaid right to require 1 to 12 each described taking-up device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309066.XA CN102837664B (en) | 2012-08-27 | 2012-08-27 | A kind of taking-up device for safety strap and safety strap 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 |
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309066.XA CN102837664B (en) | 2012-08-27 | 2012-08-27 | A kind of taking-up device for safety strap and safety strap assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102837664A true CN102837664A (en) | 2012-12-26 |
| CN102837664B CN102837664B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210309066.XA Expired - Fee Related CN102837664B (en) | 2012-08-27 | 2012-08-27 | A kind of taking-up device for safety strap and safety strap assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN102837664B (en) |
Cited By (7)
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| WO2014032546A1 (en) * | 2012-08-27 | 2014-03-06 | 上海和励信息科技有限公司 | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly |
| CN103832396A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Retractor framework, auxiliary side covers and safety device |
| CN103832388A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Drive unit clamping and fixing piece applied to pre-tightening safety device and pre-tightening safety device |
| CN103832389A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Retractor frame, retractor frame assembly and safety device |
| CN103832392A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Reel, safety device, transportation equipment and mandrel |
| CN104842929A (en) * | 2015-04-30 | 2015-08-19 | 宜兴市奥华汽配有限公司 | Gear tube component |
| CN112683554A (en) * | 2021-01-28 | 2021-04-20 | 重庆长安汽车股份有限公司 | Device and method for testing dynamic performance of self-locking spring bolt of safety belt |
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| WO2014032546A1 (en) * | 2012-08-27 | 2014-03-06 | 上海和励信息科技有限公司 | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly |
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| CN112683554A (en) * | 2021-01-28 | 2021-04-20 | 重庆长安汽车股份有限公司 | Device and method for testing dynamic performance of self-locking spring bolt of safety belt |
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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. |
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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: Retractor for safety belt and safety belt assembly Granted publication date: 20160113 License type: Common License Record date: 20181207 |
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| 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: 20160113 |