CN209534985U - A kind of coiler mandrel component and seat belt retractor - Google Patents

Abstract

This application provides a kind of coiler mandrel component and seat belt retractors, are related to seat belt retractor technical field, to solve the problems, such as the technical issues of mandrel component existing in the prior art cannot timely limit biggish twisting resistance.Coiler mandrel component includes: mandrel, torque arm and spindle nose；Torque arm is set in mandrel, and one end of torque arm is mutually clamped with mandrel, and the other end of torque arm is mutually clamped by second level limiter torsion elements with spindle nose, and limiter ring is provided on the end face of mandrel；There are two limited blocks for setting in second level limiter torsion elements, and two limited blocks are oppositely arranged, and there are gap between two limited blocks, limiter ring is arranged in second level limiter torsion elements by gap, and offsets with two limited blocks, and limiter ring is in contact with the end face of mandrel.Coiler mandrel component ensure that the stability in locking, simple and compact for structure, and production and processing is convenient.

Description

A kind of coiler mandrel component and seat belt retractor

Technical field

This application involves automotive safety facility technology fields, roll up more particularly, to a kind of coiler mandrel component and safety belt Receive device.

Background technique

Seat belt retractor refers to that the seat belt retractor of lock in emergency function, English are Emergency Locking Retractor, abbreviation ELR.It is the core component of car belt, and the function of realization includes spring recycling, inclination of vehicle sense It answers, vehicle suddenly accelerates anxious deceleration sense is answered, belt acceleration incudes etc..Safety belt is made of the synthetic fibers of intensity maximum, has Has the seat belt retractor of self-locking function, after fastening one's safety belt, seat belt retractor takes up automatically, when vehicle just in case occurring Emergency braking, head-on crash or when rolling, occupant can make safety belt by quick and fierce stretching, and safety belt is rolled up this moment The self-locking function for receiving device can block safety belt in moment, and occupant is made to be close to seat, avoid falling out outside vehicle or collision is injured.

Mandrel component in seat belt retractor has the function of limiter, after seat belt retractor locking, when safety belt by When biggish external force, the safety belt by external force can generate biggish twisting resistance, existing mandrel to mandrel component Component cannot timely limit biggish twisting resistance, and it is unstable in turn result in seat belt retractor locking.

Utility model content

The application's is designed to provide a kind of coiler mandrel component, to solve mandrel component existing in the prior art The technical issues of biggish twisting resistance cannot timely be limited.

Coiler mandrel component provided by the present application, including mandrel, torque arm and spindle nose；

The torque arm is set in the mandrel, and one end of the torque arm is mutually clamped with the mandrel, the torsion The other end of power bar is mutually clamped by second level limiter torsion elements with the spindle nose, and limiter ring is provided on the end face of the mandrel；

There are two limited blocks for setting in the second level limiter torsion elements, and two limited blocks are oppositely arranged, described in two There is gap between limited block, the limiter ring is arranged in the second level limiter torsion elements by the gap, and with two institutes It states limited block to offset, the limiter ring is in contact with the end face of the mandrel.

Further, two limited blocks are fan-shaped, formed between the apex angle of two limited blocks State gap.

Further, the first limiting section and the second limiting section, the limiter ring are symmetrically arranged on the end face of the mandrel It is arranged on the mandrel by first limiting section and the second limiting section.

Further, the first free end and the second free end are provided on the limiter ring, by first free end to The limiter ring is divided into 5 segments by second free end, is followed successively by first segment, second section, third segment, Section four Section and the 5th segment；

The first segment and the 5th segment are arcuate structure, and are oppositely arranged on the limiter ring；The third section Section is linear structure, and is laid along the radial direction of the limiter ring, and the second section and fourth segment are arcuate structure, described Second section and fourth segment are located at the both ends of the third segment, and the opening direction phase of second section and fourth segment Instead；

The lateral surface of the second section is in contact with first limiting section, first limiting section and second section The contact surface of the lateral surface of section is concave panel；The lateral surface of the fourth segment is in contact with second limiting section, and described The contact surface of two limiting sections and the lateral surface of the fourth segment is concave panel.

Further, it is provided with link block in the second level limiter torsion elements, connector is provided on the spindle nose, it is described Link block is inserted in the connector, and the limited block is between the second level limiter torsion elements and the link block.

Further, the both ends of the torque arm are respectively arranged with spline, and the second level limiter torsion elements deviate from the company It connects and is provided with the first keyway on the end face of block, the spline of wherein one end of the torque arm is arranged in first keyway It is interior.

It further, further include ball wheel, the ball wheel is set between the mandrel and the spindle nose, is set on the spindle nose Be equipped with plug division, the connector is set on the plug division, the plug division be inserted in the ball wheel and with the ball Wheel is mutually clamped.

Further, the link block is located in the ball wheel and is mutually clamped with the ball wheel.

Further, the quantity of the link block is at least 2, and the link block is set on the limited block.

Compared with the existing technology, coiler mandrel component described herein has the advantage that

The coiler mandrel component of the application, when in use, after the spindle nose of coiler mandrel component is locked up, in mandrel Safety belt continues to release, and mandrel is continued to rotate with safety belt pull-out, and torque arm one end is reversed as the mandrel rotates, in turn So that torque arm is by twisting resistance, since one end mandrel of torque arm is mutually clamped, the position that mandrel is mutually clamped with torque arm is to torsion Power bar carries out level-one limiter.Limiter ring is provided on the end face of mandrel, limited block there are two settings in second level limiter torsion elements, two A limited block is oppositely arranged, and has gap between two limited blocks, and limiter ring is arranged in second level limiter torsion elements by gap, and It offsets with two limited blocks, limiter ring is preferably arranged in second level limiter torsion elements；The other end of torque arm Mutually be clamped by second level limiter torsion elements with spindle nose, spindle nose be it is fixed, i.e., second level limiter torsion member is fixed, Second level limiter torsion elements have the function of fixation to limiter ring.Limiter ring passes through second level limiter torsion elements, and contacts simultaneously with mandrel Frictional resistance is generated, the second level limiter to torque arm is formed.

The application ensure that stability of the coiler mandrel component in locking, simple and compact for structure, production and processing side Just.

The another object of the application is to propose a kind of seat belt retractor, to solve mandrel group existing in the prior art Part cannot timely limit the technical issues of biggish twisting resistance.

In order to achieve the above objectives, the technical solution of the application is achieved in that

A kind of seat belt retractor is equipped with coiler core as described in the above technical scheme in the seat belt retractor Shaft assembly.

Possessed advantage is identical compared with the existing technology with above-mentioned coiler mandrel component for the seat belt retractor, This is repeated no more.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the application specific embodiment or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the application, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the overall structure diagram of coiler mandrel component provided by the embodiments of the present application；

Fig. 2 is limiter ring and second level limiter torsion elements positional relationship in coiler mandrel component provided by the embodiments of the present application Schematic diagram；

Fig. 3 is core shaft structure schematic diagram of the coiler mandrel component provided by the embodiments of the present application under the first visual angle；

Fig. 4 is the structure of coiler mandrel component provided by the embodiments of the present application second level limiter torsion elements under the first visual angle Schematic diagram；

Fig. 5 is the structure of coiler mandrel component provided by the embodiments of the present application second level limiter torsion elements under the second visual angle Schematic diagram；

Fig. 6 is that torque arm and the connection of second level limiter torsion elements are shown in coiler mandrel component provided by the embodiments of the present application It is intended to；

Fig. 7 is the structural schematic diagram of spindle nose in coiler mandrel component provided by the embodiments of the present application；

Fig. 8 is the structural schematic diagram of limiter ring in coiler mandrel component provided by the embodiments of the present application.

In figure: 1- mandrel；2- torque arm；3- spindle nose；4- second level limiter torsion elements；5- limiter ring；6- limited block；7- first Limiting section；The second limiting section of 8-；The first free end 9-；10- first segment；11- second section；12- third segment；13- the 4th Segment；The 5th segment 14-；The second free end 15-；16- link block；17- connector；18- spline；The first keyway of 19-； 20- Ball wheel；The plug division 21-；The second keyway of 22-.

Specific embodiment

It is clearly and completely described below in conjunction with technical solution of the attached drawing to the application, it is clear that described implementation Example is some embodiments of the present application, instead of all the embodiments.

The component of the embodiment of the present application for usually describing and showing in attached drawing here can be with a variety of different configurations To arrange and design.Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below and is wanted The scope of the present application of protection is sought, but is merely representative of the selected embodiment of the application.

Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work The every other embodiment obtained, shall fall in the protection scope of this application.

In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for describe the application and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in application.

As shown in figures 1-8, coiler mandrel component provided by the embodiments of the present application, including mandrel 1, torque arm 2 and spindle nose 3；Torque arm 2 is set in mandrel 1, and one end of torque arm 2 is clamped with 1 phase of mandrel, and the other end of torque arm 2 is limited by second level Power torsion elements 4 are clamped with 3 phase of spindle nose, are provided with limiter ring 5 on the end face of mandrel 1；Two are provided in second level limiter torsion elements 4 A limited block 6, two limited blocks 6 are oppositely arranged, and there are gap between two limited blocks 6, limiter ring 5 is arranged in two by gap Grade limiter torsion elements 4, and offset with two limited blocks 6, limiter ring 5 is in contact with the end face of mandrel 1.

Coiler mandrel component provided by the embodiments of the present application, when in use, the spindle nose 3 of coiler mandrel component are locked up Afterwards, the safety belt in mandrel 1 continues to release, and mandrel 1 is continued to rotate with safety belt pull-out, and 2 one end of torque arm is rotated with mandrel 1 And reverse, so that torque arm 2 is by twisting resistance, and since 1 phase of one end mandrel of torque arm 2 is clamped, mandrel 1 and torque arm 2 Mutually the position of clamping carries out level-one limiter to torque arm 2.Limiter ring 5, second level limiter torsion elements 4 are provided on the end face of mandrel 1 There are two limited block 6, two limited blocks 6 to be oppositely arranged for upper setting, has gap between two limited blocks 6, and limiter ring 5 passes through Gap is arranged in second level limiter torsion elements 4, and offsets with two limited blocks 6, and limiter ring 5 is allowed preferably to be arranged in two In grade limiter torsion elements 4；The other end of torque arm 2 is mutually clamped by second level limiter torsion elements 4 with spindle nose, and spindle nose 3 is to fix not Dynamic, i.e., second level limiter torsion member 4 is fixed, and second level limiter torsion elements 4 have the function of fixation to limiter ring 5.Limit Power ring 5 passes through second level limiter torsion elements 4, and frictional resistance is contacted and generated with mandrel 1, is formed and is limited the second level of torque arm 2 Power.

The application ensure that stability of the coiler mandrel component in locking, simple and compact for structure, production and processing side Just.

Coiler mandrel component provided in this embodiment ensure that stability of the mandrel component in locking, and structure is simple Compact, production and processing is convenient.

In a kind of preferred embodiment of this implementation, two limited blocks 6 are fan-shaped, between the apex angle of two limited blocks 6 It is formed with gap.

Optionally, the apex angle of two limited blocks 6 may be configured as 90 degree, i.e., the apex angle of two limited blocks 6 is right angle, That is gap of the limiter ring 5 across two limited blocks 6, and offset with one of right-angle side of each limited block 6, So that second level limiter torsion elements 4 have the function of centainly fixing to limiter ring 5.

Optionally, the face opposite with spindle nose 3 of second level limiter torsion elements 4 is the bottom surface of second level limiter torsion elements 4, second level limit The bottom surface of power torsion elements 4 is rounded, and two limited blocks 6 are oppositely arranged, and be located at second level limiter torsion elements 4 bottom surface it is straight The two sides of diameter, the gap between the apex angle of two limited blocks 6 are located at the surface at the center of the bottom surface of second level limiter torsion elements 4.

In the present embodiment, 2 limiting sections, respectively the first limiting section 7 and the second limiting section are provided on the end face of mandrel 1 8, the first limiting section 7 and the second limiting section 8 are symmetrical, and limiter ring 5 is arranged in by the first limiting section 7 with the second limiting section 8 On mandrel 1.

Optionally, the first limiting section 7 and the second limiting section 8 are strip structure.

When torque arm 2 is by biggish twisting resistance, torque arm 2 can be relatively rotated with mandrel 1, and then the limit on mandrel 1 Position portion and second level limiter torsion elements 4 relatively rotate, and limiter ring 5 can generate deformation at this time, and can produce with the limiting section on mandrel 1 Raw frictional force, increases the force value of second level limiter.

As shown in figure 8, limiter ring 5 has the first free end 9 and second in a kind of preferred embodiment of the present embodiment Free end 15, for ease of description planform of different zones everywhere on limiter ring 5 divide limiter ring 5 for 5 segments, by One the 9 to the second free end of free end 15 is successively known as first segment 10, second section 11, third segment 12,13 and of fourth segment 5th segment 14.

First segment 10 and the 5th segment 14 are arcuate structure, and are oppositely arranged on limiter ring 5, first segment 10 and the Five segments 14 surround border circular areas；Third segment 12 is linear structure, and is laid along the radial direction of the limiter ring 5, the second section Section 11 and fourth segment 13 are arcuate structure, and second section 11 and fourth segment 13 are located at the both ends of third segment 12, and Second section 11 is opposite with the opening direction of fourth segment 13.

The lateral surface of second section 11 is in contact with the first limiting section 7, the lateral surface of the first limiting section 7 and second section 11 Contact surface be concave panel, the part arc area of second section 11 is located in the concave panel of the first limiting section 7；Fourth segment 13 Lateral surface be in contact with the second limiting section 8, the contact surface of the second limiting section 8 and the lateral surface of fourth segment 13 is concave panel, The part arc area of fourth segment 13 is located in the concave panel of the second limiting section 8.

Due to the gap between the apex angle of two limited blocks 6 be located at the center of the bottom surface of second level limiter torsion elements 4 just on Side, that is to say, that the gap between two 6 apex angles of limited block is located at the center of plane locating for two limited blocks 6, limiter ring 5 gap across two 6 apex angles of limited block, and be wherein in contact on one side with each limited block 6 respectively so that second level limit Power torsion elements 4 can have the function of certain limit to limiter ring 5.

When mandrel 1 is continued to rotate with the pull-out of safety belt, mandrel 1 is first voluntarily turned by the pulling force of safety belt at this time It is dynamic, so that the first limiting section 7 is in contact with the medial surface of fourth segment 13, the medial surface of the second limiting section 8 and second section 11 It is in contact, mandrel 1 continues to rotate, and limiter ring 5 is rotated together with mandrel 1, when limiter ring 5 is another with two limited blocks 6 respectively When one end face offsets, limiter ring 5 stops operating；With continuing to rotate for mandrel 1, the limiting section and limiter ring of the end of mandrel 1 It relatively rotates between 5, second level limiter is formed to torque arm 2, meanwhile, the side end face friction of limiter ring 5 and mandrel 1 generates resistance Power, the resistance for the generation that rubs can buffer twisting resistance, and rubbing the resistance generated can be to the further limiter of torque arm 2.

When due to coiler mandrel component by biggish twisting resistance, passenger originally with belt can be protected due to inertia Original state is held, is then being dumped forward, so the contact surface of the first limiting section 7 and the lateral surface of second section 11 is recessed The contact surface of shape face and the second limiting section 8 and the lateral surface of fourth segment 13 is concave panel；So that 1 idle period of mandrel increases Add, to delay the time of second level limiter generation, it is ensured that good second level limit is carried out to the twisting resistance that coiler mandrel component is subject to Power.

Limiter ring 5 is made of elastic steel strip, has reply and elastic force, and performance is high；First segment 10 and the 5th segment 14 Radian it is identical；The cross section of the rigid item of elasticity for manufacturing limiter ring 5 is the rectangle that both ends have arc chord angle, limiter ring 5 Inside can adequately rub with coiler mandrel 1；First free end 9 is in the end of first segment 10, the second free end 15 In the end of the 5th segment 14.

Using first segment 10, second section 11, the structure of third segment 12 and the 5th segment 14, winding is facilitated to be mounted on 1 end of mandrel, when automobile in case of emergency, one end of locking mandrel 1, mandrel 1 generate twisting resistance, at this point, due to mandrel 1 Lasting rotation and limiter ring 5 between formed and rub and squeeze limiter ring 5, the first segment 10 of limiter ring 5, second section 11, Third segment 12, fourth segment 13 and the deformation of the 5th segment 14, to further form second level using deformation force and frictional force Stability when coiler locking is effectively guaranteed in limiter.

In the present embodiment, it is provided with link block 16 in second level limiter torsion elements 4, connector 17 is provided on spindle nose 3, connects Block 16 is inserted in connector 17, and limited block 6 is located between the bottom surface and link block 16 of second level limiter torsion elements 4.

The quantity of link block 16 is consistent with the quantity of connector 17, for example, as shown in Fig. 4, when second level limiter torsion It is provided with 2 link blocks 16 on part 4, corresponding on spindle nose 3 to be provided with 2 connectors 17, link block 16 is suitable with 17 phase of connector Match.

As shown in figure 4, limited block 6 is located between the bottom surface and link block 16 of second level limiter torsion elements 4, that is to say, that limit Position block 6 is located at the side that link block 16 deviates from spindle nose 3.

Preferably, the both ends of torque arm 2 are provided with spline 18, and second level limiter torsion elements 4 are on the end face of link block 16 It is provided with the first keyway 19, the spline 18 of wherein one end of torque arm 2 is arranged in the first keyway 19.

The spline 18 that 2 one end of torque arm passes through is clamped with 1 phase of mandrel, specifically, opposite with 2 one end of torque arm on mandrel 1 The position answered is provided with the second keyway 22, and the second keyway 22 is adapted with the spline 18 of 2 one end of torque arm, which is arranged in In second keyway 22；The other end of torque arm 2 is arranged in the first keyway 19 by spline 18, that is to say, that torque arm 2 passes through The spline 18 at both ends is clamped with mandrel 1,4 phase of second level limiter torsion elements respectively.

Compared with existing mandrel component, the torque arm 2 of coiler mandrel component provided in this embodiment can pass through two Grade limiter torsion elements 4 are connected with spindle nose 3, i.e. one end phase of one of end face of second level limiter torsion elements 4 and torque arm 2 The other end of clamping, second level limiter torsion elements 4 is clamped by link block 16 and 3 phase of spindle nose.When torque arm 2 is by biggish torsion When turning power, due to the spindle nose 3 of locking be it is fixed, second level limiter torsion elements 4 preferably have torque arm 2 Fixed effect.

Reeler mandrel component provided in this embodiment further includes ball wheel 20, ball wheel 20 be set to mandrel 1 and spindle nose 3 it Between, the outer circumference surface of ball wheel 20 is equipped with several circumferentially equally distributed hemispherical grooves, for connecting actuator.On spindle nose 3 Be provided with plug division 21, connector 17 is set on plug division 21, plug division 21 be inserted in ball wheel 20 and with 20 phase card of ball wheel It connects.

Specifically, ball wheel 20 is cylindrical, and internal is hollow, formation cylindrical cavity, inserting on cylindrical cavity and spindle nose 3 Socket part 21 is adapted, and plug division 21 is plugged in cylindrical cavity.

It is provided with multiple first protrusions on the inner wall of ball wheel 20, the arrangement of multiple first bulge clearances, every two adjacent the Region between one protrusion forms the first groove；Multiple second protrusions, Duo Ge are provided on the outer wall of the plug division 21 of spindle nose 3 Two bulge clearances are arranged, and the region between every two adjacent second protrusion forms the second groove, the first protrusion and the second groove It is adapted, the second protrusion is adapted with the first groove；When the plug division 21 on spindle nose 3 is inserted in ball wheel 20, first is convex at this time It rises and is located in the second groove, the second protrusion is located in the first groove, can relatively rotate to avoid spindle nose 3 and ball wheel 20.

Further, link block 16 is located in ball wheel 20 and is clamped with 20 phase of ball wheel.

Since plug division 21 is located in ball wheel 20, link block 16 is inserted in the connector 17 on plug division 21, that is, is connected Block 16 is located in ball wheel 20.Specifically, multiple third protrusions, multiple third protrusion interval rows are provided on the outer wall of link block 16 Cloth, the region between every two adjacent third protrusion form third groove, and link block 16 is located in ball wheel 20, and third is convex at this time It rises and is located in the first groove, the first protrusion of part is located in third groove, avoids the phase of second level limiter torsion elements 4 with ball wheel 20 To rotation, while also further avoiding spindle nose 3 and the relative rotation of ball wheel 20.

One of the present embodiment is preferably carried out in mode, and the quantity of link block 16 is at least 2, and link block 16 is set It is placed on limited block 6.Specifically, there are many set-up modes of link block 16, the number for the link block 16 being provided on each limited block 6 Amount may be the same or different.

For example, when the quantity of link block 16 is 2, be also provided on the bottom surface of second level limiter torsion elements 4 there are two Limited block 6, and two limited blocks 6 are oppositely arranged, and a link block 16 is respectively arranged on each limited block 6.

Present invention also provides a kind of belt reel devices, including said reel device mandrel component.

Since belt reel device includes reeler mandrel component provided by the above embodiment, thus there is reeler mandrel Whole beneficial effects that component has, this is no longer going to repeat them.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of coiler mandrel component characterized by comprising mandrel, torque arm and spindle nose；

The torque arm is set in the mandrel, and one end of the torque arm is mutually clamped with the mandrel, the torque arm The other end be mutually clamped with the spindle nose by second level limiter torsion elements, limiter ring is provided on the end face of the mandrel；

There are two limited blocks, two limited blocks to be oppositely arranged for setting in the second level limiter torsion elements, two limits There is gap between block, the limiter ring is arranged in the second level limiter torsion elements by the gap, and with two limits Position block offsets, and the limiter ring is in contact with the end face of the mandrel.

2. coiler mandrel component according to claim 1, which is characterized in that two limited blocks are fan-shaped, and two The gap is formed between the apex angle of a limited block.

3. coiler mandrel component according to claim 1, which is characterized in that be symmetrically arranged on the end face of the mandrel First limiting section and the second limiting section, the limiter ring are arranged in the mandrel by first limiting section and the second limiting section On.

4. coiler mandrel component according to claim 3, which is characterized in that the limiter ring have the first free end and The limiter ring is divided into 5 segments by first free end to second free end, is followed successively by first by the second free end Segment, second section, third segment, fourth segment and the 5th segment；

The first segment and the 5th segment are arcuate structure, and are oppositely arranged on the limiter ring；The third segment is Linear structure, and laying along the radial direction of the limiter ring, the second section and fourth segment are arcuate structure, described second Segment and fourth segment are located at the both ends of the third segment, and second section is opposite with the opening direction of fourth segment；

The lateral surface of the second section is in contact with first limiting section, first limiting section and the second section The contact surface of lateral surface is concave panel；The lateral surface of the fourth segment is in contact with second limiting section, second limit The contact surface of the lateral surface of position portion and the fourth segment is concave panel.

5. coiler mandrel component according to claim 4, which is characterized in that be provided in the second level limiter torsion elements Link block is provided with connector on the spindle nose, and the link block is inserted in the connector, and the limited block is located at described Between second level limiter torsion elements and the link block.

6. coiler mandrel component according to claim 5, which is characterized in that the both ends of the torque arm are respectively arranged with Spline, the second level limiter torsion elements are provided with the first keyway on the end face of the link block, and the torque arm is wherein The spline of one end is arranged in first keyway.

7. coiler mandrel component according to claim 5, which is characterized in that further include ball wheel, the ball wheel is set to Between the mandrel and the spindle nose, plug division is provided on the spindle nose, the connector is set on the plug division, institute Plug division is stated to be inserted in the ball wheel and be mutually clamped with the ball wheel.

8. coiler mandrel component according to claim 7, which is characterized in that the link block be located in the ball wheel and It is mutually clamped with the ball wheel.

9. coiler mandrel component according to claim 8, which is characterized in that the quantity of the link block is at least 2, The link block is set on the limited block.

10. a kind of seat belt retractor, which is characterized in that including coiler mandrel as claimed in any one of claims 1-9 wherein Component.