CN211001238U - Force limiting type mandrel and safety belt retractor - Google Patents
Force limiting type mandrel and safety belt retractor Download PDFInfo
- Publication number
- CN211001238U CN211001238U CN201921733197.4U CN201921733197U CN211001238U CN 211001238 U CN211001238 U CN 211001238U CN 201921733197 U CN201921733197 U CN 201921733197U CN 211001238 U CN211001238 U CN 211001238U
- Authority
- CN
- China
- Prior art keywords
- mandrel
- force
- curved
- groove
- limiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 230000006978 adaptation Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020347 spindle assembly Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Automotive Seat Belt Assembly (AREA)
Abstract
The utility model belongs to the technical field of the safety belt technique and specifically relates to a power-limiting formula dabber and safety belt coiler are related to. Limit power formula dabber is through setting up bent shape joint groove on the resistance piece on the one hand, and the one end of limit power ring can the joint in bent shape joint inslot, and the other end is walked around butt portion and is extended at least a week on the terminal surface of dabber body, has consequently improved second grade limit power stroke at second grade limit power in-process. Simultaneously, still be provided with the external thread connecting portion on the resistance piece, be provided with the internal thread connecting portion on the inner wall of dabber body, at second grade limit power in-process, along with the rotation of dabber body, the internal thread connecting portion on the dabber body can screw in external thread connecting portion, the internal thread connecting portion of dabber body revolves to the root of external thread connecting portion when the second grade limit power process of limit power ring is ended, under the effect of screw thread restriction this moment for dabber body and spindle nose stop relative rotation, realize the control that the limit power stops.
Description
Technical Field
The utility model belongs to the technical field of the safety belt technique and specifically relates to a power-limiting formula dabber and safety belt coiler are related to.
Background
The seat belt is used to protect a driver or a passenger when the vehicle is driven or seated, and a retractor of the seat belt is locked when a collision accident occurs in the vehicle, so that a human body can be restrained on a seat. However, when the vehicle is traveling at a high speed or in a heavy collision, the seat belt continues to be pulled out by the inertia of the human body. In order to limit the continuous pulling-out of the safety belt, the force limiting structure is additionally arranged in a mandrel of the safety belt retractor to limit the continuous pulling-out of the safety belt in the prior art, but on one hand, the force limiting stroke of the existing force limiting structure is short, and on the other hand, the force limiting mode is single, so that the force limiting is required to be improved.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a power limiting formula dabber and safety belt coiler to improve the technical problem that the power limiting structure power limiting stroke of current safety belt is short and the power limiting mode is single to a certain extent.
The application provides a force-limiting mandrel for a safety belt retractor, which comprises a mandrel body, a resistance part, a force-limiting ring and a mandrel head;
the resistance piece is connected between the mandrel body and the mandrel head; a curved clamping groove is formed in one end of the resistance piece, and an abutting part is formed on the end face of the mandrel body; one end of the force limiting ring is positioned in the curved clamping groove, and the other end of the force limiting ring can bypass the abutting part and extend on the end face of the mandrel body;
an external thread connecting part is formed on the outer wall of the resistance piece, and an internal thread connecting part matched with the external thread connecting part is formed on the mandrel body; when the mandrel body rotates along a first direction relative to the shaft head, the internal thread connecting part can be screwed into the external thread connecting part until the mandrel body and the shaft head stop rotating relatively.
In the above technical solution, preferably, the number of the abutting portions on the end surface of the mandrel body is one, an extending portion of the force limiting ring on the end surface of the mandrel body is spiral, and a rotation direction of the extending portion is the first direction.
In any of the above technical solutions, preferably, the mandrel body includes a mandrel barrel and a stop nut;
the stop nut is arranged at one end, close to the shaft head, in the shaft barrel, a positioning groove is formed in the inner wall of the shaft barrel, a positioning part is formed in the outer wall of the stop nut, and the positioning part can be clamped into the positioning groove so that the stop nut and the shaft barrel can move synchronously; the inner surface of the stop nut forms the female threaded connection.
In any of the above solutions, preferably, the resistance member includes a shaft portion and a head portion;
the rod part is positioned in the mandrel, and one end of the rod part is in key connection with the mandrel body; the other end of the rod part is connected with the head part in a key way;
the head faces towards the end face of one end of the shaft head, the curved clamping groove is formed in the end face of one end of the shaft head, and a stopping portion is arranged on the outer wall of the head and corresponds to the root of the external thread connecting portion.
In any of the above technical solutions, preferably, a first protruding portion, a second protruding portion and a third protruding portion are formed on an end surface of one end of the head portion facing the spindle nose;
a first curved groove is formed between the first protruding part and the second protruding part, a second curved groove is formed between the first protruding part and the third protruding part, and the first curved groove is communicated with the second curved groove to form the curved clamping groove;
the limit ring is provided with a first clamping portion matched with the first curved groove and a second clamping portion matched with the second curved groove, so that one end of the limit ring can be clamped in the curved clamping groove.
In any one of the above technical solutions, preferably, the second protruding portion and the third protruding portion are located on two sides of the first protruding portion, and the first protruding portion is columnar, so that the first curved groove and the second curved groove form the curved clamping groove in an annular shape.
In any one of the above technical solutions, preferably, a fourth protruding portion is further disposed between the second protruding portion and the third protruding portion, a third limiting groove is formed between the fourth protruding portion and the second protruding portion, and a fourth curved groove is formed between the fourth protruding portion and the third protruding portion; the third limiting groove, the first curved groove, the second curved groove and the fourth curved groove are communicated in sequence to form the curved clamping groove;
the last third joint portion that still is formed with of limit force ring with the third spacing groove looks adaptation and with the fourth joint portion of the curved shape groove looks adaptation of fourth, third joint portion first joint portion second joint portion with fourth joint portion connect in order and can the joint in curved shape joint inslot.
In any one of the above technical solutions, preferably, the number of the fourth protruding portions is two, two of the fourth protruding portions are symmetrically disposed on two sides of the first protruding portion, and form two of the third limiting grooves and two of the fourth curved grooves, which are symmetric with respect to the first protruding portion, with the second protruding portion and the third protruding portion.
In any of the above technical solutions, preferably, a fifth clamping portion and an extending portion sequentially connected with the third clamping portion are further formed on the force limiting ring;
fifth joint portion can extend to butt portion deviates from one side of resistance, the extension is in be the heliciform extension on the terminal surface of dabber body, so that the dabber for the spindle nose is followed when the first direction rotates, butt portion can with fifth joint portion looks butt, and promote fifth joint portion with the extension twines in on the outer wall of head.
The application also provides a safety belt retractor, which comprises the force-limiting type mandrel.
Compared with the prior art, the beneficial effects of the utility model are that:
the application discloses limit for force formula dabber is through setting up bent shape joint groove on the resistance piece on the one hand, and the one end of limit for force ring can the joint in bent shape joint inslot, and the other end of limit for force ring can bypass butt portion and extend at least a week on the terminal surface of dabber body, consequently improved second grade limit for force stroke at second grade limit for force in-process. Simultaneously, still be provided with the external screw thread connecting portion on the resistance, be provided with the internal screw thread connecting portion on the inner wall of dabber body, in second grade limit power in-process, along with the rotation of dabber body, the internal screw thread connecting portion on the dabber body can screw in external screw thread connecting portion, limit power ring whole twines the annular space between butt portion and the head of resistance promptly after the second grade limit power process of limit power ring is ended, the internal screw thread connecting portion and the external screw thread connecting portion of dabber body assemble in place this moment, under the effect of screw thread restriction, stop relative rotation between the head of dabber body and resistance, thereby make dabber body and spindle nose stop relative rotation, realize the control that stops the limit power.
The safety belt retractor comprises the force limiting type mandrel, and therefore the safety belt retractor also has the beneficial effect that the force limiting stop can be better controlled when the force limiting stroke is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a resistance element of a force-limiting mandrel according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a head of a resistance element of a force-limiting mandrel according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a resistance member and a stop nut of a force-limiting mandrel according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a mandrel body of a force-limiting mandrel according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a force limiting ring of a force limiting mandrel according to an embodiment of the present invention;
fig. 6 is a schematic view of an assembly structure of a force limiting ring, a resistance member and a mandrel of the force limiting mandrel according to the embodiment of the present invention;
fig. 7 is a schematic structural view of a force-limiting mandrel according to an embodiment of the present invention.
Reference numerals:
1-mandrel body, 12-mandrel barrel, 121-abutting part, 122-positioning groove, 13-stop nut, 131-positioning part, 132-internal thread connecting part, 2-resistance part, 21-rod part, 22-head part, 221-first bulge part, 222-second bulge part, 223-third bulge part, 224-fourth bulge part, 225-first curved groove, 226-second curved groove, 227-third limiting groove, 228-fourth curved groove, 229-stopping part, 230-external thread connecting part, 3-force limiting ring, 31-first clamping part, 32-second clamping part, 33-third clamping part, 34-fourth clamping part, 35-fifth clamping part, 36-extending part and 4-shaft head.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.
The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Force limiting mandrels and seat belt retractors in accordance with some embodiments of the present invention are described below with reference to fig. 1-7.
Referring to fig. 1 to 7, an embodiment of the present application provides a force-limiting mandrel, which includes a mandrel body 1, a resistance element 2, a force-limiting ring 3 and a mandrel head 4, wherein the mandrel body 1 is used for winding a safety belt; the resistance element 2 is used for connecting the mandrel body 1 and the shaft head 4, and can be matched with the force limiting ring 3 to limit the relative rotation between the mandrel body 1 and the shaft head 4.
Specifically, referring to fig. 1, 4, 6 and 7, the interior of the mandrel body 1 is hollow, the safety belt is wound on the outer wall of the mandrel body 1, and the spindle head 4 is disposed at one end of the mandrel body 1. The resistance part 2 comprises a rod part 21 and a head part 22, one end of the rod part 21 is positioned in the mandrel body 1 and is in splined connection with the first end of the mandrel body 1, the other end of the rod part 21 is connected with one end of the head part 22, the other end of the head part 22 extends out of the end face of the second end of the mandrel body 1 and is clamped with the shaft head 4, a curved clamping groove is formed in the end face of the other end of the head part 22, one end of the force limiting ring 3 is clamped in the curved clamping groove, and therefore one end of the force limiting ring 3 can be fixed relative to the head part 22; an abutting part 121 is formed on the end face of the second end of the mandrel body 1, the abutting part 121 is located on the side part of the curved clamping groove, the other end of the force limiting ring 3 can bypass the outer side of the abutting part 121 and extend on the end face of the mandrel body 1, and the extending direction of the force limiting ring 3 is the opposite direction of the rotating direction of the mandrel body 1 when the safety belt is pulled out. Therefore, when the vehicle runs normally, the mandrel body 1 and the shaft head 4 rotate synchronously, and the safety belt can be normally pulled out or retracted; in the event of a crash, the head 22 of the resistance member 2 stops rotating because the head 4 of the seat belt pretensioner stops rotating, and the inertia of the person pulls the seat belt and continues to pull it out, so that the spindle body 1 continues to rotate relative to the head 4, and the abutment 121 on the spindle body 1 also rotates. When the mandrel body 1 rotates relative to the shaft head 4, the two ends of the rod part 21 of the resistance part 2 are stressed unevenly, so that the rod part 21 of the resistance part 2 can be twisted, and the twisting process of the rod part 21 is the first-level force limit for the mandrel body 1. And in the process of the rotation of the mandrel body 1, because one end of the force limiting ring 3 bypasses the abutting part 121, in the process of the rotation of the mandrel body 1, the abutting part 121 can abut against the force limiting ring 3 and push the part of the force limiting ring 3, which extends to the end face of the mandrel body 1, to be wound between the abutting part 121 and the resistance piece 2 until the force limiting ring 3 fills the annular space between the abutting part 121 and the resistance piece 2, and the mandrel body 1, the resistance piece 2 and the shaft head 4 are all stopped rotating, and in the process, the force limiting ring 3 is deformed to prevent the rotation of the mandrel body 1, so that the process is a secondary force limiting for the mandrel body 1.
It should be noted that the pretensioning action of the seat belt pretensioner on the shaft end is well-established in the prior art, and thus the specific principle process is not described in detail.
For the force limiting process, as shown in fig. 2, 5 and 6, since the force limiting mandrel of the embodiment of the present application is provided with the curved clamping groove at the head 22 of the resistance member 2, so that one end of the force limiting ring 3 is clamped in the curved clamping groove, that is, one end of the force limiting ring 3 is subjected to stable clamping, and the other end of the force limiting ring 3 extends on the end surface of the mandrel body 1, so that the secondary force limiting stroke of the force limiting ring 3 is selected, and on the premise that one end of the force limiting ring 3 is fixed, the extending length of the force limiting ring 3 on the end surface of the mandrel body 1 can be selectively set according to the requirement of the secondary force limiting stroke. Preferably, the number of the abutting portions 121 on the end surface of the mandrel body 1 is one, the extending portion of the force limiting ring 3 on the end surface of the mandrel body 1 is spiral, the corresponding degree of the central angle is greater than or equal to 360 degrees, that is, the secondary force limiting stroke of the mandrel body 1 is at least one circle; and the rotating direction of the extending part of the force limiting ring 3 on the end surface of the mandrel body 1 is a first direction, and the first direction is the opposite direction of the rotating direction of the mandrel body 1 when the safety belt is pulled out.
The rod portion 21 and the head portion 22 of the resistance element 2 may be of an integral structure, or may be of a split structure, preferably of a split structure, in which case the rod portion 21 and the head portion 22 are in spline connection.
In addition, referring to fig. 1, 3 and 4, in order to better control the stopping of the force limiting process, in the present application, an external thread connecting portion 230 is provided on the outer wall of the head portion 22 of the resistance element 2, an internal thread connecting portion 132 is provided on the inner wall surface of one end of the corresponding mandrel body 1, the internal thread connecting portion 132 is adapted to the external thread connecting portion 230, during the secondary force limiting process, along with the rotation of the mandrel body 1, the internal thread connecting portion 132 on the mandrel body 1 can be screwed into the external thread connecting portion 230, after the secondary force limiting process of the force limiting ring 3 is finished, i.e. the force limiting ring 3 is completely wound in the annular space between the abutting portion 121 and the head portion 22 of the resistance element 2, at this time, the internal thread connecting portion 132 of the mandrel body 1 is screwed to the root portion of the external thread connecting portion 230, i.e. the internal thread connecting portion 132 and the external thread connecting portion 230 are assembled in, therefore, the mandrel body 1 and the shaft head 4 stop relative rotation, and the control of force limiting stop is better realized. Preferably, a stop portion 229 is disposed at the root of the head portion 22 of the resistance element 2 corresponding to the external thread connection portion 230, and the stop portion 229 can further stop the mandrel body 1, so as to ensure that the force limiting stop can be realized.
Preferably, referring to fig. 3 and 4, the mandrel body 1 comprises a mandrel barrel 12 and a stop nut 13, wherein the stop nut 13 is arranged at one end of the mandrel barrel 12 close to the mandrel head 4, a positioning groove 122 is arranged on the inner wall of the mandrel barrel 12, the number of the positioning grooves 122 can be one or more, a positioning part 131 is formed on the outer wall of the stop nut 13 corresponding to the positioning groove 122, and the positioning part 131 can be clamped into the positioning groove 122 so that the stop nut 13 can move synchronously with the mandrel barrel 12; the inner surface of the retainer nut 13 forms an internally threaded connection 132.
Furthermore, it should be noted that the force limiting process of the female threaded connection 132 on the retaining nut 13 and the male threaded connection 230 on the resistance element 2 may be performed simultaneously with the secondary force limiting process of the force limiting ring 3, that is, when the secondary force limiting process is stopped, the female threaded connection 132 of the retaining nut 13 is screwed to the stop 229 on the resistance element 2. In addition, the force limiting stopping process of the internal thread connecting part 132 on the stop nut 13 and the external thread connecting part 230 on the resistance element 2 can be performed or stopped asynchronously with the secondary force limiting process of the force limiting ring 3, that is, when the secondary force limiting is not stopped, the internal thread connecting part 132 of the stop nut 13 is screwed to the stopping part 229 on the resistance element 2 to complete the force limiting stopping process, and the like. Whether the secondary force limiting process and the force limiting stopping process are synchronously carried out or stopped mainly depends on the requirement of the spindle assembly for a safety belt protection mode.
The following describes some preferred embodiments of the curved snap-in groove of the head 22 of the resistance element 2 of the present application and of the corresponding force limiting ring 3, in conjunction with fig. 2, 5 and 6.
In the embodiment of the present application, as shown in fig. 2, 5 and 6, the head 22 of the resistance member 2 is formed with a first projection 221, a second projection 222 and a third projection 223 on the end surface facing the head 4;
a first curved groove 225 is formed between the first convex part 221 and the second convex part 222, a second curved groove 226 is formed between the first convex part 221 and the third convex part 223, and the first curved groove 225 is communicated with the second curved groove 226 to form a curved clamping groove; the force limiting ring 3 is formed with a first clamping portion 31 matched with the first curved groove 225 and a second clamping portion 32 matched with the second curved groove 226, so that one end of the force limiting ring 3 can be clamped in the curved clamping groove. And preferably, the second and third protrusions 222 and 223 are located at both sides of the first protrusion 221, and the first protrusion 221 is cylindrical, so that the first and second curved grooves 225 and 226 form a curved catching groove in a ring shape. The setting in annular bent shape joint groove can play more stable limiting displacement to the one end of limit force ring 3, has increased the frictional force of limit force ring 3 with the head 22 of resistance 2, and the limit force process is more stable.
In addition, in order to further improve the limit of the curved clamping groove on one end of the force limiting ring 3, referring to fig. 2, 5 and 6, it is preferable that the embodiment of the present application further has a fourth protrusion 224 between the second protrusion 222 and the third protrusion 223, and the fourth protrusion 224 and the third protrusion 224 are
A third limiting groove 227 is formed between the second convex parts 222, and a fourth curved groove 228 is formed between the fourth convex part 224 and the third convex part 223; the third limiting groove 227, the first curved groove 225, the second curved groove 226 and the third curved groove are communicated in sequence to form a curved clamping groove; the limiting ring 3 is correspondingly provided with a third clamping portion 33 matched with the third limiting groove 227 and a fourth clamping portion 34 matched with the fourth curved groove 228, and the third clamping portion 33, the first clamping portion 31, the second clamping portion 32 and the fourth clamping portion 34 are sequentially connected and can be clamped in the curved clamping grooves. Set up a plurality of curved groove through setting up on the head 22 of resistance 2, can further increase the stability to the limiting displacement of limit ring 3, further increased the frictional force of limit ring 3 with the head 22 of resistance 2 simultaneously, the limit power process is more stable.
In addition, in order to increase the applicability of the resistance piece 2 and the force limiting ring 3 of the application, and to satisfy the situation that the mandrel body 1 rotates to different directions when the safety belt is pulled, the embodiment of the application designs two modes for the assembly positions of the resistance piece 2 and the force limiting ring, and as shown in fig. 2, 5 and 6, the force limiting function when the mandrel body 1 rotates clockwise or counterclockwise when the safety belt is pulled can be satisfied. Specifically, the embodiment of the present application provides that the number of the fourth protrusions 224 is two, two fourth protrusions 224 are symmetrically disposed on both sides of the first protrusion 221, and two third stopper grooves 227 and two fourth curved grooves 228 are formed symmetrically with respect to the first protrusion 221 with the second protrusion 222 and the third protrusion 223, so that the first curved groove 225, the second curved groove 226 and one third stopper groove 227 and one fourth curved groove 228 on one side thereof form a first fitting position of the force limiting ring 3, the first curved groove 225, the second curved groove 226 and one third stopper groove 227 and one fourth curved groove 228 on the other side thereof form a second fitting position of the force limiting ring 3, and since the two third stopper grooves 227 and the two fourth curved grooves 228 are respectively symmetrical with respect to the first protrusion 221, two fitting positions of the spindle symmetrical with respect to the first protrusion 221 can be formed, so that the extending directions of one end of the force limiting wire mounted at the two fitting positions on the end face of the body 1 are opposite, i.e. corresponding to two different rotational directions of the mandrel body 1.
In addition, as shown in fig. 2, 5 and 6, a fifth clamping portion 35 and an extension portion 36 are formed on the force-limiting ring 3, and are sequentially connected with the third clamping portion 33; preferably, the fifth clamping portion 35 has a certain radian and is used for abutting against the abutting portion 121, so that the pushing process of the abutting portion 121 on the force limiting ring 3 is more stable; and extension 36 can extend to the butt portion 121 and deviate from one side of resistance 2, and extension 36 is the heliciform extension on the terminal surface of dabber body 1 to when making the dabber rotate along first direction for spindle nose 4, butt portion 121 can with fifth joint portion 35 looks butt, and promote fifth joint portion 35 and extension 36 and twine on the outer wall of head 22.
The application also provides a safety belt retractor, including the power limiting type dabber of above-mentioned embodiment. Because the safety belt retractor system comprises the force-limiting type mandrel, the safety belt retractor system has the whole beneficial effects of the force-limiting type mandrel, and the description is omitted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A force-limiting mandrel is used for a safety belt retractor and is characterized by comprising a mandrel body, a resistance part, a force-limiting ring and a mandrel head;
the resistance piece is connected between the mandrel body and the mandrel head; a curved clamping groove is formed in one end of the resistance piece, and an abutting part is formed on the end face of the mandrel body; one end of the force limiting ring is positioned in the curved clamping groove, and the other end of the force limiting ring can bypass the abutting part and extend on the end face of the mandrel body;
an external thread connecting part is formed on the outer wall of the resistance piece, and an internal thread connecting part matched with the external thread connecting part is formed on the mandrel body; when the mandrel body rotates along a first direction relative to the shaft head, the internal thread connecting part can be screwed into the external thread connecting part until the mandrel body and the shaft head stop rotating relatively.
2. The force-limiting mandrel of claim 1 wherein the number of abutments on the end face of the mandrel body is one, the extension of the force-limiting ring on the end face of the mandrel body is helical, and the direction of rotation of the extension is in the first direction.
3. The force limiting mandrel of claim 2 wherein said mandrel body comprises a mandrel barrel and a stop nut;
the stop nut is arranged at one end, close to the shaft head, in the shaft barrel, a positioning groove is formed in the inner wall of the shaft barrel, a positioning part is formed in the outer wall of the stop nut, and the positioning part can be clamped into the positioning groove so that the stop nut and the shaft barrel can move synchronously; the inner surface of the stop nut forms the female threaded connection.
4. The force-limiting mandrel of claim 3 wherein said resistance member comprises a stem portion and a head portion;
the rod part is positioned in the mandrel, and one end of the rod part is in key connection with the mandrel body; the other end of the rod part is connected with the head part in a key way;
the head faces towards the end face of one end of the shaft head, the curved clamping groove is formed in the end face of one end of the shaft head, and a stopping portion is arranged on the outer wall of the head and corresponds to the root of the external thread connecting portion.
5. The force-limiting mandrel of claim 4 wherein the head has an end surface facing the end of the mandrel head having formed thereon a first boss, a second boss and a third boss;
a first curved groove is formed between the first protruding part and the second protruding part, a second curved groove is formed between the first protruding part and the third protruding part, and the first curved groove is communicated with the second curved groove to form the curved clamping groove;
the limit ring is provided with a first clamping portion matched with the first curved groove and a second clamping portion matched with the second curved groove, so that one end of the limit ring can be clamped in the curved clamping groove.
6. The force-limiting mandrel of claim 5 wherein said second and third protrusions are located on opposite sides of said first protrusion, and said first protrusion is cylindrical such that said first and second curved slots form said curved snap-fit slot in the shape of a ring.
7. The force-limiting mandrel of claim 6 wherein a fourth boss is disposed between the second boss and the third boss, a third limiting groove is formed between the fourth boss and the second boss, and a fourth curved groove is formed between the fourth boss and the third boss; the third limiting groove, the first curved groove, the second curved groove and the fourth curved groove are communicated in sequence to form the curved clamping groove;
the last third joint portion that still is formed with of limit force ring with the third spacing groove looks adaptation and with the fourth joint portion of the curved shape groove looks adaptation of fourth, third joint portion first joint portion second joint portion with fourth joint portion connect in order and can the joint in curved shape joint inslot.
8. The force-limiting mandrel of claim 7 wherein the number of the fourth protrusions is two, two of the fourth protrusions are symmetrically disposed on both sides of the first protrusion, and form two of the third limiting grooves and two of the fourth curved grooves with the second protrusion and the third protrusion, which are symmetrical with respect to the first protrusion.
9. The force-limiting mandrel of claim 8 wherein the force-limiting ring further comprises a fifth clamping portion and an extension portion sequentially connected to the third clamping portion;
fifth joint portion can extend to butt portion deviates from one side of resistance, the extension is in be the heliciform extension on the terminal surface of dabber body, so that the dabber for the spindle nose is followed when the first direction rotates, butt portion can with fifth joint portion looks butt, and promote fifth joint portion with the extension twines in on the outer wall of head.
10. A seat belt retractor comprising a force-limiting spindle as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733197.4U CN211001238U (en) | 2019-10-16 | 2019-10-16 | Force limiting type mandrel and safety belt retractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733197.4U CN211001238U (en) | 2019-10-16 | 2019-10-16 | Force limiting type mandrel and safety belt retractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211001238U true CN211001238U (en) | 2020-07-14 |
Family
ID=71505504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921733197.4U Withdrawn - After Issue CN211001238U (en) | 2019-10-16 | 2019-10-16 | Force limiting type mandrel and safety belt retractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211001238U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525374A (en) * | 2019-10-16 | 2019-12-03 | 沈阳金杯锦恒汽车安全系统有限公司 | Limit type mandrel and seat belt retractor |
-
2019
- 2019-10-16 CN CN201921733197.4U patent/CN211001238U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525374A (en) * | 2019-10-16 | 2019-12-03 | 沈阳金杯锦恒汽车安全系统有限公司 | Limit type mandrel and seat belt retractor |
| CN110525374B (en) * | 2019-10-16 | 2024-05-17 | 沈阳金杯锦恒汽车安全系统有限公司 | Force limiting type mandrel and safety belt retractor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9283928B2 (en) | Load limiter | |
| US7354014B2 (en) | Seat belt retractor | |
| CN109278699B (en) | Coiler mandrel assembly and safety belt coiler | |
| CN107791998B (en) | Mandrel assembly structure of safety belt retractor | |
| CN211001238U (en) | Force limiting type mandrel and safety belt retractor | |
| EP2889191B1 (en) | Retractor for safety belt, torsion bar, spool, end cap and safety belt assembly | |
| CN110562192A (en) | Retractor spindle assembly with force limiting stop function and safety belt retractor | |
| CN104494558B (en) | A kind of Webbing retractor for stopping function with limiter | |
| CN102837664A (en) | Retractor for safety belt and safety belt assembly | |
| CN202743196U (en) | Winder for safety belt and safety belt assembly | |
| CN102490681B (en) | Seat belt retractor | |
| CN210760667U (en) | Retractor spindle assembly and safety belt retractor | |
| US7410113B2 (en) | Modular torsion bar | |
| CN109278700A (en) | Steel ball driving pre-tightens limit type seat belt retractor | |
| CN110562194A (en) | Retractor spindle assembly and safety belt retractor | |
| CN107187414A (en) | The Webbing retractor of variable limiter and variable limiter implementation method | |
| CN109291877A (en) | Novel preload limit type seat belt retractor | |
| CN110525374B (en) | Force limiting type mandrel and safety belt retractor | |
| JP7151364B2 (en) | seat belt retractor | |
| CN211001239U (en) | Dabber subassembly and safety belt coiler | |
| CN209757044U (en) | Novel pretension limit power formula safety belt coiler | |
| CN210760666U (en) | Force limiting wire piece, mandrel assembly and safety belt retractor | |
| CN210760664U (en) | Retractor spindle assembly and safety belt retractor | |
| CN214929582U (en) | Safety belt retractor | |
| CN209938528U (en) | Coiler mandrel component and safety belt coiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200714 Effective date of abandoning: 20240517 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200714 Effective date of abandoning: 20240517 |