CN2758133Y - Pretightening device of safety belt - Google Patents
Pretightening device of safety belt Download PDFInfo
- Publication number
- CN2758133Y CN2758133Y CN 200420103526 CN200420103526U CN2758133Y CN 2758133 Y CN2758133 Y CN 2758133Y CN 200420103526 CN200420103526 CN 200420103526 CN 200420103526 U CN200420103526 U CN 200420103526U CN 2758133 Y CN2758133 Y CN 2758133Y
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- CN
- China
- Prior art keywords
- fixed
- seat belt
- housing
- shell fragment
- belt pretensioners
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- 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.)
- Expired - Lifetime
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- Automotive Seat Belt Assembly (AREA)
Abstract
The utility model relates to a pre-tightening device of a safety belt; an air-pressure chamber is formed by a guide wall (21) and a tight embrace device (6) at the inner part of a pre-tightening device casing (22); the periphery of the tight embrace device (6) is wounded with an elastic sheet; the tail end of the wounded part (15) of the elastic sheet is embedded in a clamping groove (13) on the tight embrace device (6) for fixing; the part (15) which is not wounded of the elastic sheet is arranged and fixed in a gas guide groove formed by the guide wall (21) and fixing benches (3 and 11); the tight embrace device is annular; the edge of an inner ring is designed into wedge shapes; thus, a round rod (7) can be arranged in each wedge-shaped groove; one end of each round rod (7) is fixed on a round rod frame (14) at one side of the tight embrace device (6), the other end is fixed to a positioning frame (26). The utility model plays roles in emergency collision accidents, retracts instantly a certain distance to lock, limits movement of passengers and thus effectively protects the passengers.
Description
[technical field]
The utility model relates to a kind of seat belt pretensioners, particularly relates to a kind of seat belt pretensioners that is applicable to belt with pre-load device.
[background technology]
Belt with pre-load device is a kind of later-model safety strap that development in recent years is got up, what normally the increase safety belt pretensioner constituted on common safety strap.This belt with pre-load device can be in low-intensity collision and the situation that safety air bag is not opened, and under the high strength impact air bag situation about also not opening, can in time tighten up safety strap, thereby effectively protect the occupant; Simultaneously and since it can eliminate well when beginning collision ribbon and the occupant between slack, so the relative motion between occupant and the car body is reduced, thereby occupant's chest, belly played a very good protection.
At present, the preloader that this belt with pre-load device adopted is divided into the bayonet type preloader according to its control position difference, and promptly preloader combines with snap close; And retractor pretensioner (claiming tensioner again), promptly preloader combines with taking-up device.In retractor pretensioner, also divide rotator type is arranged, pinion and-rack and piston type etc. are multiple, their principle of work mainly is to provide high pressure gas by the gas generator gas generant composition in accordance, promote the rotor of piston or similar piston function, and then kinetic energy is delivered on the belt reel, drive safety strap backrush one segment distance, reach the effect of eliminating the gap constraint occupant.
Under this mode, its performance is generally comparatively stable, and in a single day backrush length can be regulated when producing as required, but is fixed up, just can not change again.More than several preloaders to the having relatively high expectations of gas generator, the gaseous tension that needs is very high, so the gas generator explosive load is more, this has brought certain trouble to design, needs suitable material and structure guarantee its intensity and leakproofness thereof.
In order to make full use of high pressure gas, raise the efficiency, reduce dose, many technical personnels have been done a lot of work in this respect, and the pinion and-rack of some bipolar igniting has used on the part safety strap, but DeGrain, and Ignition Control is had relatively high expectations.
Chinese patent CN2516403Y is a kind of preloader in the form of piston, and efficient is lower, and comparing with this device to have higher pressure that preloader is worked, and reliability is relatively poor; In addition, general preloader in the form of piston must withdraw certain angle or the distance could lose heart, this angle or distance are fixed, in case the gap between people and the seat is less than this distance, can cause pushing human body, cause danger, if greater than this gap, then the gap of people and seat still exists, and has weakened the effect of preloader; In addition, this preloader structure is too simple, and the automobile actual accidents changes various, and its reliability and stability are difficult to guarantee fully, cause inefficacy easily.CN1430561A has provided a kind of pre-tightening apparatus of rack-and-gear, directly the ability that aerogenesis apparatus is produced passes to tooth bar, the promotion gear rotates, this hard transfer device is because without any the link that cushions, lost efficacy easily or cause preloader to lock deadly excessively, do not limit power mechanism, may exist preloader to the reverse side injury that human body caused during actual the use, as break rib.
For this reason, the said goods is real is further improved.
[utility model content]
Technical problem to be solved in the utility model is; a kind of seat belt pretensioners is provided; the safety strap of certain stroke can bounce back when automobile occurs such as safety misadventures such as collisions; the displacement of occupant restraint; thereby effectively protect the occupant to avoid or reduce impact strength, reduce injures and deaths with the collision of automotive trim.
For solving the problems of the technologies described above the utility model:
A kind of seat belt pretensioners, in pre-tightening apparatus housing (22) inside, together with training wall (21) with hold device (6) tightly and constitute air-pressure chamber, hold device (6) periphery tightly and be wound with shell fragment, and the end of shell fragment winding part (15) is to be embedded in the draw-in groove of holding tightly on the device (6) (13) and to be fixed; The unwound part of shell fragment (5) then is fixed in the gas flow guiding groove that is made of training wall (21), fixed way (3,11), hold device (6) tightly and be ring-type, interior ring edge designs becomes wedge, thereby in each wedge groove, a round bar (7) can be set, one end of these round bars (7) is fixed on and is positioned on the round bar frame (14) of holding device (6) one sides tightly, and the other end then is fixed on the locating rack (26).
As replenishing to the technical program:
The shell fragment (5) of not reeling is fixing by plastic cement pin (4,8,12,16).
In the gas flow guiding groove, also be provided with some projections (23).
Shell fragment is designed to have a radian in advance, and in its side towards the gas flow guiding groove, also is provided with air baffle (10,19), and the one end is embedded in respectively in the groove on training wall (21) and the housing (22).
In each air-pressure chamber, also respectively be provided with bleeder port (9,18) on training wall (21) and the housing (22).
Round bar frame (14) is to be embedded on the housing (22), and covers fixingly by a backing plate (17), and fixed form is on backing plate (17), and the profile of corresponding circle bridge (14) has corresponding hole, and round bar (7) is passed to be connected on the round bar frame (14).
The shape size of backing plate (17) meets the moulding of air-pressure chamber, and is to be fixed in the housing (22) by boss (20).
Described pre-tightening apparatus is buckled pre-tightening apparatus lid (25) and is fixed by screw (27).
Some intraware plastic cement pins (4,8,12,16) are equipped with corresponding grooves on housing (22).
The utlity model has following advantage:
1) provides a kind of pre-tightening apparatus that is different from pinion and-rack and rotator type mode of operation, be that the mode of operation pulling belt reel of utilizing air pressure to promote shell fragment is rotated, the high pressure gas that this mechanism produces aerogenesis apparatus almost all are used for doing work, being used to promote belt reel rotates, the efficient height, whole mechanism is stable, reliable.
2) the shell fragment mechanism formula constructional feature of this preloader, can fully improve the degree of utilization that produces gas, the rigidity of shell fragment and the flexible characteristics that combine are equivalent to a reliable buffering, can stablely promote the shell fragment pulling and hold device tightly, thereby drive effective rotation of belt reel, this structure has good stable.
3) in the degree of utilization that has improved high pressure gas that gas generator produces, also reduced the explosive load of gas generator, reduced cost, in addition, because the reduction of gas generator dose makes power reduce, make the time spent destructive force and reduce the safety that has improved car load.
When 4) pretension of the generation of preloader surpasses certain limit, hold the structure of the round bar between device and the belt reel tightly, can guarantee active volume around, simultaneously, when load force surpasses certain value, can trackslip automatically, thereby limit power mechanism appears, this limit power mechanism can guarantee that the power that belt retraction is applied on occupant's health can not surpass safety value, can not break rib, thereby make the safety strap safety and reliability.
5) in addition, this seat belt pretensioners also has following characteristics: the retractible stroke of safety strap is bigger, still the gap can be eliminated in the time of can guaranteeing big gap; Other like products do not have very high requirement to surface working relatively, and are easy to process, are applicable to production in enormous quantities.
[description of drawings]
Fig. 1 is the section of structure of the utility model seat belt pretensioners;
Fig. 2 is each partial assembly drawing of the utility model seat belt pretensioners.
[specific embodiment]
In conjunction with example the utility model is described in further detail with reference to the accompanying drawings:
See also Fig. 1 to Fig. 2, the utility model seat belt pretensioners, on structure design, gas generator 24 is installed in the special-purpose chamber of housing 22, to pre-tightening apparatus delivered inside high pressure gas, gas generator 24 is enclosed within housing 22 inside by air guide port 1 by plug 2.In addition, for reaching preferable sealing effectiveness, the shell of gas generator 24, promptly the step of ignition tube position and housing 22 in-to-in steps are cooresponding mutually, to play the fully enclosed effect.
And in pre-tightening apparatus housing 22 inside, together with training wall 21 with hold device 6 tightly and constitute two air-pressure chambers, hold device 6 tightly and be positioned at core position, its periphery is wound with shell fragment, and the end of shell fragment winding part 15 is to be embedded in the draw-in groove of holding tightly on the device 6 13 and to be fixed; The unwound part 5 (being designated hereinafter simply as shell fragment) of shell fragment then is fixed in the gas flow guiding groove that is made of training wall 21, fixed way 3,11, fixing by plastic cement pin 4,8,12,16, and in these gas flow guiding grooves, also be provided with some projections 23 to play auxiliary fixation.
In addition, the shell fragment 5 here is designed to have a radian in advance, and in its side towards the gas flow guiding groove, also is provided with air baffle 10,19, and the one end is embedded in respectively in the groove on training wall 21 and the housing 22.And, in each air-pressure chamber, also respectively be provided with bleeder port 9,18 on training wall 21 and the housing 22.
Hold device 6 tightly and be ring-type, interior ring edge designs becomes wedge, thereby in each wedge groove, a round bar 7 can be set, and an end of these round bars 7 is fixed on and is positioned on the round bar frame 14 of holding device 6 one sides tightly, and the other end then is fixed on the locating rack 26, here, round bar frame 14 is to be embedded on the housing 22, and covers fixingly by a backing plate 17, and fixed form is on backing plate 17, the profile of corresponding circle bridge 14 has corresponding hole, and makes round bar 7 pass this hole to be connected on the round bar frame 14.The shape size of this backing plate 17 meets the moulding of two air-pressure chambers, and is to be fixed in the housing 22 by boss 20.
In addition, more corresponding intrawares such as plastic cement pin 4,8,12,16 are equipped with corresponding grooves in the hope of installing firmly on housing 22.After these intraware assemblings finish, will buckle pre-tightening apparatus lid 25 and be fixed.Pre-tightening apparatus lid 25 seals by screw 27 and a kind of connection mode, and this connection mode can be that one or more of modes such as sealant sealing, adhesive bonds, buckle mix and use.
Specify this pre-tightening apparatus principle of work with the one action process below:
After the work beginning, gas generator 24 produces high pressure gas, gas flow is shown in the direction of arrow among Fig. 1, high pressure gas are divided into two strands of air-flows after air guide port 1 comes out, gas flow guiding groove by training walls 21 in the housing 22 are divided into produces pressure along the direction of arrow to shell fragment 5, and shell fragment 5 is moved along the direction of arrow, here, owing to be provided with air baffle 10,19, air-flow will mainly concentrate on shell fragment 5 one sides, and make the moment of shell fragment 5 motions keep maximum, simultaneously, the shell fragment part 15 of crispaturaing is driven by friction force and holds device 6 tightly and rotate along the diagram directions of arrow, after holding device 6 tightly and rotating, because its wedge groove is provided with, to force round bar 7 to move to holding device 6 center of circle directions tightly, and then hold safe tape spool (be fixedly connected on and hold device 6 cores tightly, figure do not show) tightly, and begin to drive axle and rotate, turn to bleeder port 9 up to shell fragment 5, during 18 positions, gas is outside releasing housing 22 here, and holding device 6 tightly will stop operating, and this moment, safe tape spool turned an angle, safety strap is reel-up, has reached the function of pretension.
In addition, in some cases, people and seat gap are less than the preloader design amount of crispaturaing, when gaseous tension acquires a certain degree (hypertonia can cause hurting the people who uses belt with pre-load device), high pressure gas can be discharged with the gap of backing plate 17 and pre-tightening apparatus lid 25 by holding device 6 tightly, reducing gaseous tension, unlikely the people is produced injury.
Here the shell fragment that is adopted is made by a kind of steel, have higher modulus of elasticity after treatment, and toughness is better.This structure can make full use of the effect of moment, as the arm of force, such structure has reduced the requirement to air pressure with the part shell fragment, just can achieve the goal with lower air pressure, obviously not only reduce the gas generator dose, more structure design has been reduced difficulty and cost.
The foregoing description just embodies the preferred version of technical solutions of the utility model, those skilled in the art to wherein some part some changes that may make all embodied principle of the present utility model, belong within the protection domain of the present utility model.
Claims (9)
1, a kind of seat belt pretensioners is characterized in that: in pre-tightening apparatus housing (22) inside, and together with training wall (21) with hold device (6) tightly and constitute air-pressure chamber,
Hold device (6) periphery tightly and be wound with shell fragment, and the end of shell fragment winding part (15) is to be embedded in the draw-in groove (13) held tightly on the device (6) and to be fixed; The unwound part of shell fragment (5) then is fixed in the gas flow guiding groove that is made of training wall (21), fixed way (3,11),
Hold device (6) tightly and be ring-type, interior ring edge designs becomes wedge, thereby in each wedge groove, a round bar (7) can be set, and an end of these round bars (7) is fixed on and is positioned on the round bar frame (14) of holding device (6) one sides tightly, and the other end then is fixed on the locating rack (26).
2, as claim 1 described seat belt pretensioners, it is characterized in that: the shell fragment of not reeling (5) is fixing by plastic cement pin (4,8,12,16).
3, as claim 1 described seat belt pretensioners, it is characterized in that: in the gas flow guiding groove, also be provided with some projections (23).
4, as claim 1 described seat belt pretensioners, it is characterized in that: shell fragment is designed to have a radian in advance, and in its side towards the gas flow guiding groove, also be provided with air baffle (10,19), the one end is embedded in respectively in the groove on training wall (21) and the housing (22).
5, as claim 1 described seat belt pretensioners, it is characterized in that: in each air-pressure chamber, also respectively be provided with bleeder port (9,18) on training wall (21) and the housing (22).
6, as claim 1 described seat belt pretensioners, it is characterized in that: round bar frame (14) is to be embedded on the housing (22), and fix by a backing plate (17) covering, fixed form is on backing plate (17), the profile of corresponding circle bridge (14) has corresponding hole, and round bar (7) is passed to be connected on the round bar frame (14).
7, as claim 6 described seat belt pretensioners, it is characterized in that: the shape size of backing plate (17) meets the moulding of air-pressure chamber, and is to be fixed in the housing (22) by boss (20).
8, as claim 1 described seat belt pretensioners, it is characterized in that: described pre-tightening apparatus is buckled pre-tightening apparatus lid (25) and is fixed by screw (27).
9, as claim 1 described seat belt pretensioners, it is characterized in that: some intraware plastic cement pins (4,8,12,16) are equipped with corresponding grooves on housing (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420103526 CN2758133Y (en) | 2004-12-28 | 2004-12-28 | Pretightening device of safety belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420103526 CN2758133Y (en) | 2004-12-28 | 2004-12-28 | Pretightening device of safety belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2758133Y true CN2758133Y (en) | 2006-02-15 |
Family
ID=36078277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420103526 Expired - Lifetime CN2758133Y (en) | 2004-12-28 | 2004-12-28 | Pretightening device of safety belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2758133Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849840A (en) * | 2019-02-12 | 2019-06-07 | 安徽工程大学 | A kind of car belt dististyle preload assembly |
-
2004
- 2004-12-28 CN CN 200420103526 patent/CN2758133Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109849840A (en) * | 2019-02-12 | 2019-06-07 | 安徽工程大学 | A kind of car belt dististyle preload assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141228 Granted publication date: 20060215 |