CN217515124U

CN217515124U - Integrated pre-tightening force-limiting type retractor

Info

Publication number: CN217515124U
Application number: CN202221568401.3U
Authority: CN
Inventors: 朱峥; 方斌; 黄宇浩
Original assignee: Yancheng Mocheng Automobile Interior Technology Co ltd
Current assignee: Yancheng Mocheng Automobile Interior Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-09-30
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to an integral type pretension limit power formula coiler, including the support, the moving axis, the dead axle, pretension wheel, pretension shroud and dead axle shroud, be equipped with moving axis and dead axle on the support, be used for twining the safety belt on the moving axis, dead axle one end is followed the outer edge and is equipped with the backup pad, the support provides radial support for the backup pad, move axis and backup pad link through the insurance arch and link integratively, the dead axle is kept away from the one end overcoat of backup pad and is had dead axle shroud, the dead axle terminal surface is equipped with telescopic pawl, dead axle shroud inner chamber is followed the circumference and is equipped with the interior ratchet that sets up with the pawl correspondence, even there is the force limiting rod between moving axis and the dead axle, the moving axis, dead axle and force limiting rod's axis are on the same straight line, moving axis one end even pretension wheel, pretension wheel overcoat has pretension shroud, pretension shroud provides axial support for the moving axis, moving axis one end is equipped with the protective sheath, the support provides radial support for the protective sheath outer edge, the protective sleeve is isolated between the moving shaft and the pre-tightening wheel. The utility model has the advantages of small daily wear and low axial displacement probability.

Description

Integral type pretension limit power formula coiler

Technical Field

The utility model relates to a coiler technical field, concretely relates to integral type pretension limit power formula coiler.

Background

The retractor is the core subassembly of car blet, and the function of realization includes that the spring is retrieved, vehicle slope response, vehicle rapid acceleration and deceleration response, meshbelt acceleration response etc.. The main demand in the market at present is pretension limit power formula coiler, when the car meets emergency, exerts the pretension function and eliminates the clearance between safety belt and the human body as far as possible, then exerts the limit power function and reduces the tensile peak value of safety belt, reduces the injury to the human body, improves the security. The traditional pretensioning force-limiting retractor does not process relative friction between a moving shaft and a support and relative friction between a fixed shaft and the support, so that the loss of the moving shaft and the fixed shaft is caused in daily use, the service life is influenced, and the force-limiting function is influenced. In addition, if the moving shaft and the fixed shaft shift, the normal rotation of the moving shaft and the fixed shaft can be influenced, and whether the positioning of the moving shaft and the fixed shaft is accurate or not influences the product quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integral type pretension limit power formula coiler of reducing wear, reduction axial displacement probability.

The technical scheme of the utility model as follows:

the utility model provides an integral type pretension limit power formula coiler, includes support, moving axis, dead axle, pretension wheel, pretension shroud and dead axle shroud, moving axis and dead axle are equipped with on the support, be used for twining the safety belt on the moving axis, dead axle one end is followed outer along being equipped with the backup pad, the support provides radial support for the backup pad, move axis and backup pad are connected in an organic whole through the insurance arch, the one end overcoat that the backup pad was kept away from to the dead axle has the dead axle shroud, the dead axle shroud provides axial support for the dead axle, the dead axle terminal surface is equipped with the telescopic pawl, dead axle shroud inner chamber is equipped with the interior ratchet that corresponds the setting with the pawl along the circumference, even there is the limit force pole between moving axis and the dead axle, the axis of moving axis, dead axle and limit force pole is on same straight line, moving axis one end even has pretension wheel, the pretension wheel overcoat has the pretension shroud, the pretension shroud provides axial support for the moving axis, the pre-tightening cover provides power required by driving for the pre-tightening wheel, a protective sleeve is arranged at one end of the movable shaft, the support provides radial support for the outer edge of the protective sleeve, and the protective sleeve is isolated between the movable shaft and the pre-tightening wheel.

Preferably, the protective sheath is the cover body that the appearance is the cylinder, the internal diameter of protective sheath is equivalent with the external diameter of moving axis installation department, protective sheath inner chamber bottom offsets with the moving axis, protective sheath outside end and pretension wheel offset, protective sheath inner chamber bottom evenly is equipped with the buckle on same circumference, be equipped with the draw-in groove that corresponds the buckle on the moving axis, the buckle card is gone into in the draw-in groove.

Preferably, the number of the buckles is 4.

Preferably, pretension is covered and is included gas generator, pipeline, marble and collection storehouse, pretension wheel inner core and moving axis inter-spline connection, pretension wheel is outer along evenly being equipped with the rotatory chamber that can cooperate the marble, the marble lets pretension wheel rotate through promoting rotatory chamber, be equipped with the pipeline that tangential pretension wheel was followed outward on the pretension shroud, collect storehouse import tangential pretension wheel is outer along, it is relative with the pipeline opening to collect the storehouse import, be equipped with the marble in the pipeline, the pipeline is kept away from open-ended termination and is used for promoting the gas generator of marble.

Preferably, both ends of the force limiting rod are respectively connected with the movable shaft and the fixed shaft through splines, grooves are formed in the middle of the two ends of the force limiting rod, and protruding points for placing the grooves are arranged on the movable shaft and the fixed shaft.

Preferably, the inner cavity of the movable shaft is provided with an annular groove abutting against the fixed shaft.

Preferably, a circular groove A is formed in the dead axle cover cap, and the end part of the dead axle is placed in the circular groove A.

Preferably, the pre-tightening cover cap is provided with a circular groove B, the end part of the moving shaft is provided with a protruding part, and the protruding part is placed in the circular groove B.

Preferably, the pre-tightening cover cap is provided with a limiting ring along the outer edge of the circular groove B, the moving shaft is provided with a limiting groove corresponding to the limiting ring, and the limiting ring is placed in the limiting groove.

The utility model discloses the beneficial technological effect who has:

1. by backup pad and protective sheath and support contact, moving axis and dead axle do not carry out direct contact with the support, reduce the friction between moving axis and dead axle and support, reduce daily use loss, increase of service life, when meetting emergency, the coefficient of friction of protective sheath is lower, reduce with the support between the friction, let the limit power function play more smoothly.

2. The support is used for radially supporting the support plate and the protective sleeve, the pre-tightening cover cap and the fixed shaft cover cap are used for respectively providing axial support for the moving shaft and the fixed shaft, axial dislocation of the moving shaft and the fixed shaft is reduced, and normal rotation is influenced.

Drawings

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view of the main viewing angle of the present invention.

Fig. 3 is a schematic structural view of the inner cavity of the protective cover of the present invention.

In the figure: 1-bracket, 2-moving shaft, 3-fixed shaft, 4-pre-tightening wheel, 5-pre-tightening cover cap, 6-fixed shaft cover cap, 7-support plate, 8-safety protrusion, 9-pawl, 10-internal ratchet, 11-limiting rod, 12-protective sleeve, 13-buckle, 14-clamping groove, 15-gas generator, 16-pipeline, 17-marble, 18-collection bin, 19-rotating cavity, 20-groove, 21-bump, 22-annular groove, 23-circular groove A, 24-circular groove B, 25-protrusion, 26-limiting ring and 27-limiting groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment is as follows:

as shown in fig. 1 to 3, the embodiment provides an integrated pre-tightening force-limiting retractor, which includes a bracket 1, a moving shaft 2, a fixed shaft 3, a pre-tightening wheel 4, a pre-tightening cover 5 and a fixed shaft cover 6, the bracket 1 is provided with the moving shaft 2 and the fixed shaft 3, the moving shaft 2 is used for winding a safety belt, one end of the fixed shaft 3 is provided with a support plate 7 along an outer edge, the bracket 1 provides a radial support for the support plate 7, the moving shaft 2 and the support plate 7 are connected into a whole through a safety protrusion 8, the fixed shaft 3 is externally covered with the fixed shaft cover 6 at an end far away from the support plate 7, the fixed shaft cover 6 provides an axial support for the fixed shaft 3, an end surface of the fixed shaft 3 is provided with a retractable pawl 9, an inner ratchet 10 corresponding to the pawl 9 is arranged along a circumference of an inner cavity of the fixed shaft cover 6, a force limiting rod 11 is connected between the moving shaft 2 and the fixed shaft 3, center shafts of the fixed shaft 3 and the force limiting rod 11 are on the same straight line, one end of the moving shaft 2 is connected with the pre-tightening wheel 4, the pre-tightening wheel 4 is covered with a pre-tightening cover cap 5, the pre-tightening cover cap 5 provides axial support for the moving shaft 2, the pre-tightening cover cap 5 provides power required by driving for the pre-tightening wheel 4, one end of the moving shaft 2 is provided with a protective sleeve 12, the support 1 provides radial support for the outer edge of the protective sleeve 12, and the protective sleeve 12 is separated between the moving shaft 2 and the pre-tightening wheel 4.

Specifically, by backup pad 7 and protective sheath 12 and support 1 contact, moving axis 2 and dead axle 3 do not carry out direct contact with support 1, reduce the friction between moving axis 2 and dead axle 3 and support 1, reduce daily use loss, increase of service life, when meetting emergency, protective sheath 12's coefficient of friction is lower, reduce and support 1 within a definite time friction, let the limit of force function performance more smooth. The support 1 provides radial support for the support plate 7 and the protective sleeve 12, the pre-tightening cover 5 and the fixed shaft cover 6 respectively provide axial support for the moving shaft 2 and the fixed shaft 3, and axial dislocation of the moving shaft 2 and the fixed shaft 3 is reduced, so that normal rotation is affected.

Further, protective sheath 12 is the cover body that the appearance is the cylinder, and the internal diameter of protective sheath 12 is equivalent with the external diameter of moving axis 2 installation department, and protective sheath 12 inner chamber bottom offsets with moving axis 2, and protective sheath 12 outside end offsets with pretension wheel 4, and protective sheath 12 inner chamber bottom evenly is equipped with buckle 13 on same circumference, is equipped with the draw-in groove 14 that corresponds buckle 13 on moving axis 2, and buckle 13 card is gone into in draw-in groove 14, and the quantity of buckle 13 is 4. The buckle 13 is dispersed evenly, and the atress is steady, lets protective sheath 12 can stably fix at moving axis 2 tip, normal performance protection moving axis 2's function.

Further, include gas generator 15 on pretension shroud 5, pipeline 16, marble 17 and collection storehouse 18, spline connection between 4 inner cores of pretension wheel and moving axis 2, pretension wheel 4 is outer along evenly being equipped with the rotatory chamber 19 that can cooperate marble 17, marble 17 lets pretension wheel 4 rotate through promoting rotatory chamber 19, be equipped with the pipeline 16 that the tangential pretension wheel 4 was followed outward on pretension shroud 5, collection storehouse 18 import tangential pretension wheel 4 is followed outward, collection storehouse 18 import is relative with the pipeline 16 opening, be equipped with marble 17 in the pipeline 16, pipeline 16 keeps away from open-ended termination and has been used for promoting gas generator 15 of marble 17. The gas generator 15 provides power for advancing the marble 17, the moving marble 17 pushes the pre-tightening wheel 4 to rotate, and the marble 17 driving the function of the pre-tightening wheel 4 rushes into the collection bin 18.

Furthermore, two ends of the force limiting rod 11 are respectively connected with the movable shaft 2 and the fixed shaft 3 through splines, a groove 20 is formed in the middle of each of the two ends of the force limiting rod 11, and protruding points 21 for placing the grooves 20 are formed in the movable shaft 2 and the fixed shaft 3. The connecting strength between the force limiting rod 11 and the movable shaft 2 and the fixed shaft 3 is increased.

Further, an annular groove 22 for butting the fixed shaft 3 is arranged in the inner cavity of the movable shaft 2. The stability of the mutual position between the movable shaft 2 and the fixed shaft 3 is improved.

Furthermore, a circular groove A23 is arranged in the dead axle cover 6, and the end part of the dead axle 3 is placed in the circular groove A23. The limit capability of the dead axle cover 6 to the dead axle 3 is increased.

Furthermore, a circular groove B24 is arranged on the pretension cover 5, a protruding part 25 is arranged at the end part of the moving shaft 2, and the protruding part 25 is placed in the circular groove B24. The limiting capacity of the pre-tightening cover 5 on the moving shaft 2 is improved.

Furthermore, the pre-tightening cover 5 is provided with a limit ring 26 along the outer edge of the circular groove B24, the moving shaft 2 is provided with a limit groove 27 corresponding to the limit ring 26, and the limit ring 26 is placed in the limit groove 27. The limiting capacity of the pre-tightening cover 5 on the moving shaft 2 is increased.

The utility model discloses a theory of operation:

when an automobile meets an emergency, the gas generator 15 is triggered, the marble 17 in the pipeline 16 is pushed by gas to rush to the rotating cavity 19 on the outer edge of the pre-tightening wheel 4, the moving marble 17 drives the pre-tightening wheel 4 to rotate by pushing the rotating cavity 19, the rushed marble 17 is collected by the collecting bin 18, the rotating pre-tightening wheel 4 drives the moving shaft 2 to rotate, the rotating moving shaft 2 pulls the safety belt in the tightening direction, and the gap between the safety belt and the body of a passenger is eliminated as much as possible. When a vehicle encounters an emergency, the pawl 9 extends out and is clamped into the inner ratchet 10 to fix the relative position of the fixed shaft 3 and the fixed shaft cover 6, when a passenger pulls the safety belt towards the original vehicle running direction due to inertia, the safety protrusion 8 is cut off when the pulling force of the safety belt is large, the movable shaft 2 and the fixed shaft 3 rotate relatively, two ends of the force limiting rod 11 are respectively connected with the movable shaft 2 and the fixed shaft 3 through splines, at the moment, the force limiting rod 11 can be twisted and deformed, the acting time of the safety belt is prolonged, the tension peak value of the safety belt is reduced, and the personal safety of the passenger is protected.

By backup pad 7 and protective sheath 12 and support 1 contact, moving axis 2 and dead axle 3 do not carry out direct contact with support 1, reduce the friction between moving axis 2 and dead axle 3 and support 1, reduce daily use loss, increase of service life, when meetting emergency, protective sheath 12's coefficient of friction is lower, reduce with support 1 friction within a definite time, let the limit of force function play more smoothly. The support 1 provides radial support for the support plate 7 and the protective sleeve 12, the pre-tightening cover 5 and the fixed shaft cover 6 respectively provide axial support for the moving shaft 2 and the fixed shaft 3, and axial dislocation of the moving shaft 2 and the fixed shaft 3 is reduced, so that normal rotation is affected.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. The utility model provides an integral type pretension limit power formula coiler which characterized in that: the safety belt retractor comprises a support, a moving shaft, a fixed shaft, a pre-tightening wheel, a pre-tightening cover cap and a fixed shaft cover cap, wherein the moving shaft and the fixed shaft are arranged on the support, a safety belt is wound on the moving shaft, a supporting plate is arranged at one end of the fixed shaft along the outer edge, the support provides radial support for the supporting plate, the moving shaft and the supporting plate are connected into a whole through a safety bulge, the fixed shaft is externally covered with the fixed shaft cover cap at the end far away from the supporting plate, the fixed shaft cover cap provides axial support for the fixed shaft, a telescopic pawl is arranged on the end face of the fixed shaft, inner ratchets corresponding to the pawl are arranged in the inner cavity of the fixed shaft cover cap along the circumference, a force limiting rod is connected between the moving shaft and the fixed shaft, the center shafts of the moving shaft, the fixed shaft and the force limiting rod are in the same straight line, the pre-tightening wheel is connected with one end of the moving shaft, the pre-tightening wheel is externally covered with the pre-tightening cover cap, the pre-tightening cover cap provides axial support for the moving shaft, and power required by driving for the pre-tightening wheel, the movable shaft is provided with a support, the support is used for providing radial support for the outer edge of the movable shaft, and the movable shaft is arranged between the movable shaft and the pre-tightening wheel.

2. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: the protective sheath is the cover body that the appearance is the cylinder, the internal diameter of protective sheath is equivalent with the external diameter of moving axis installation department, protective sheath inner chamber bottom offsets with the moving axis, protective sheath outside end and pretension wheel offset, protective sheath inner chamber bottom evenly is equipped with the buckle on same circumference, be equipped with the draw-in groove that corresponds the buckle on the moving axis, the buckle card is gone into in the draw-in groove.

3. The integrated pre-tightening force-limiting retractor according to claim 2, wherein: the number of the buckles is 4.

4. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: including gas generator, pipeline, marble and collection storehouse on the pretension housing cover, pretension wheel inner core and moving axis inter-spline connection, the pretension wheel is outer along evenly being equipped with the rotatory chamber that can cooperate the marble, the marble lets the pretension wheel rotate through promoting rotatory chamber, be equipped with the pipeline on the outer edge of tangential pretension wheel on the pretension housing cover, collect the storehouse import tangential the pretension wheel is outer along, it is relative with the pipeline opening to collect the storehouse import, be equipped with the marble in the pipeline, open-ended termination is kept away from to the pipeline has the gas generator who is used for promoting the marble.

5. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: the limiting rod is characterized in that two ends of the limiting rod are connected with a movable shaft and a fixed shaft through splines respectively, grooves are formed in the middle of two ends of the limiting rod, and convex points for placing the grooves are formed in the movable shaft and the fixed shaft.

6. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: and the inner cavity of the moving shaft is provided with an annular groove butted with the fixed shaft.

7. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: a circular groove A is formed in the fixed shaft cover, and the end of the fixed shaft is placed in the circular groove A.

8. The integrated pre-tightening force-limiting retractor according to claim 1, wherein: the pre-tightening cover cap is provided with a circular groove B, the end part of the moving shaft is provided with a protruding part, and the protruding part is placed in the circular groove B.

9. The integrated pre-tightening force-limiting retractor according to claim 8, wherein: the pre-tightening cover is provided with a limiting ring along the outer edge of the circular groove B, the moving shaft is provided with a limiting groove corresponding to the limiting ring, and the limiting ring is placed in the limiting groove.