CN102514540A - Propellant pre-tightening device of automobile safety belt - Google Patents
Propellant pre-tightening device of automobile safety belt Download PDFInfo
- Publication number
- CN102514540A CN102514540A CN2011104607166A CN201110460716A CN102514540A CN 102514540 A CN102514540 A CN 102514540A CN 2011104607166 A CN2011104607166 A CN 2011104607166A CN 201110460716 A CN201110460716 A CN 201110460716A CN 102514540 A CN102514540 A CN 102514540A
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- cylinder
- cavity
- gunpowder
- tightening
- tightening device
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Abstract
The invention relates to a propellant pre-tightening device of an automobile safety belt. The device is provided with an L-shaped cylinder, wherein a part of the cylinder, at which a mold cavity is formed, is a long part, and the other part of the cylinder is a short part; an empty cavity formed at the short part of the cylinder is communicated with the mold cavity to form an L-shaped empty cavity; the propellant pre-tightening device further comprises an internally-hollow locking cover; the locking cover is detachably matched with a port of the short part of the cylinder; after the inner part of the locking cover is matched with the empty cavity of the short part of the cylinder, an object laying cavity capable of accommodating a gas generator is formed; a through-hole is formed at the top end of the locking cover; the pre-tightening device further comprises the gas generator; an igniting joint is arranged at one end of the gas generator, and propellant is stored at the other end of the gas generator; one end of the igniting joint of the gas generator is exposed in air through the through-hole; and the other end of the gas generator, at which the propellant is arranged, extends into the empty cavity of the short part of the cylinder. The pre-tightening device has the characteristics that the propellant is safely stored, the mounting is convenient, a piston is reliably fixed, the pre-tightening effect is good.
Description
Technical field
The present invention relates to a kind of car belt gunpowder pre-tightening device.
Background technology
At present; Automobile all is equipped with seat belt device; And the seat belt apparatus place all is provided with gunpowder pre-tightening device, when automobile bumps, reaches fast through gunpowder pre-tightening device safety strap is regained; The occupant is pushed on the seat, thereby reduce the secondary injury that the vehicle collision back occupant receives in car; Existing gunpowder pretensioner device comprises frame, reel, gear, bar shaped cylinder and is arranged on firing unit joint, gunpowder, piston, tooth bar, the seal ring in the cylinder that cylinder is that bar shaped and inside offer an an actor's rendering of an operatic tune, is being arranged in order firing unit joint, gunpowder, piston in an actor's rendering of an operatic tune; End at cylinder offers opening, and the firing unit joint exposes in air, offers seal groove on the piston; Seal ring is arranged on the seal groove; Also be provided with a support board on the piston, an end of support board is connected with piston body, and tooth bar is arranged on the support board; Rack and pinion is meshed, and gear is meshed with reel; And gunpowder is contained between firing unit joint and the piston.Existing this gunpowder pre-tightening device is because gunpowder directly is stored in an actor's rendering of an operatic tune, and such setting is also dangerous; And the firing unit joint also need could dock with the automotive wire bundle connector through a transition wire harness, trouble not only is installed but also increased cost; The fixing also instability of piston.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of gunpowder storage safe, car belt gunpowder pre-tightening device easy for installation are provided.
For achieving the above object, the present invention adopts a kind of car belt gunpowder pre-tightening device, comprises frame, reel, gear, cylinder and is arranged on piston, tooth bar; Cylinder interior offers an an actor's rendering of an operatic tune, is provided with piston in an actor's rendering of an operatic tune, also is provided with a support board on the piston, and an end of support board is connected with piston body, and tooth bar is arranged on the support board, and rack and pinion is meshed, and gear is meshed with reel; Wherein, described cylinder shape is L shaped, and the part that wherein offers an actor's rendering of an operatic tune is length portion, and another part is a weak point portion; The short portion of cylinder offers a cavity, and this cavity communicates with an actor's rendering of an operatic tune and forms a L shaped cavity; This gunpowder pre-tightening device also includes the tightening cover of an inner hollow; Tightening cover is detachable with the port of cylinder weak point portion and cooperates; The inside of tightening cover cooperates the back to form the object placing cavity that can hold gas generator with the cavity of cylinder weak point portion, the apical position of tightening cover offers through hole; This pre-tightening device also includes a gas generator; Gas generator one end has the igniting joint; Other end storage gunpowder, an end of gas generator igniting joint exposes in air through through hole, and the other end that gas generator has gunpowder stretches in the cavity of cylinder weak point portion.
Gunpowder is stored in the gas generator, and an end of gas generator storage gunpowder stretches in the cavity of cylinder weak point portion, makes that the storage of gunpowder is more safe; Cylinder is L-shaped, and the gas generator joint exposes in air, makes the gas generator joint directly to dock with the wire harness connector of automobile, need not to connect a transition wire harness again, has reduced cost; Tightening cover is detachable with the port of cylinder weak point portion and cooperates, can be more convenient in the installation and removal process.
Wherein, offer a shotpin groove on the piston body, the shotpin groove is arranged on piston body and support board bonded assembly one end, and the shotpin groove is vertical with the sense of motion of piston, and cylinder wall opposite position place also is provided with a shotpin that matches with shotpin groove size.
Through shotpin and cooperating of shotpin groove piston being fixed in an actor's rendering of an operatic tune, make that fixing of piston is more reliable.
Wherein, the junction of described cylinder cavity and an actor's rendering of an operatic tune be bevelled, direction of tilt is towards cavity.
The junction of cylinder cavity and an actor's rendering of an operatic tune be bevelled, direction of tilt makes behind auto against towards cavity; Gas generator begins igniting; The igniting back produces a large amount of high pressure gas, makes the pressure of gas increase through this bevelled inwall, and fast speed promotes piston more; The tooth bar that piston promotes on the support board makes the reel fast speed operate, thereby makes this automobile pretensioner work efficiency improve.
Wherein, described tightening cover is a screw thread fit with detachable cooperation of the port of cylinder weak point portion, and the inwall of tightening cover is provided with negative thread, and the port position of cylinder weak point portion is provided with outside thread.
Adopt the mode of screw thread fit to make to remove and install more easy, the stationarity of screw thread fit is also fine.
Described support board is provided with a registration mast near one side of cavity, and the opposite position place offers a positioning groove on the tooth bar, and positioning groove is the location with registration mast and cooperates.
Be arranged on the position near cavity, such propelling thrust is maximum, can more effective promotion tooth bar; And just there is remaining space that a registration mast is set in position near cavity.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention product;
Fig. 2 is the section drawing of embodiment of the invention product front view;
Fig. 3 is the section drawing of embodiment of the invention product lateral plan;
Fig. 4 is an embodiment of the invention structure of piston scheme drawing.
The specific embodiment
See also Fig. 1-4; The present invention adopts a kind of car belt gunpowder pre-tightening device; Comprise that frame 1, reel 3, this gunpowder pre-tightening device also include the cylinder 2 of " L " type; Cylinder 2 is divided into long portion 21 and weak point portion 22 through length, and the long portion 21 and the weak point portion 22 of cylinder 2 offer an actor's rendering of an operatic tune and cavity respectively, and an actor's rendering of an operatic tune and cavity are interconnected and make cylinder 2 inside also be " L " type; The junction of cylinder cavity and an actor's rendering of an operatic tune be bevelled, direction of tilt is towards cavity; Such setting can be increased work efficiency so that pressure increases; Cylinder weak point portion 22 has a port; And this gunpowder pre-tightening device includes one and is the tightening cover 7 of screw thread fit with this port; Tightening cover 7 inside offer a through hole for hollow and top; Tightening cover 7 cooperates with the port of cylinder weak point portion 22, and tightening cover 7 in-to-in hollow spaces and cavity form the object placing cavity that can hold gas generator 9; One end of gas generator 7 has an igniting joint; Gunpowder is stored in an other end of gas generator 7; The through hole that the igniting joint is offered through tightening cover 7 tops exposes in air, and an end of gas generator 7 storage gunpowder stretches in the cavity of cylinder weak point portion 22; Be provided with piston 4 in an actor's rendering of an operatic tune of cylinder length portion 21; Piston has the body bonded assembly support board 41 of one one end and piston 4; The other end of support board 41 is provided with a registration mast 411, and the opposite position place is provided with a positioning groove on the tooth bar 5, and tooth bar 5 is equipped with on support board 41 through positioning groove and registration mast 411; Tooth bar 5 is meshed with gear 6, and gear 6 is meshed with reel 3; Also be provided with a shotpin groove 42 on the body of piston 4, this shotpin groove is arranged on piston body and support board bonded assembly one end, and the direction of shotpin groove and the sense of motion of piston are perpendicular.
When gunpowder pre-tightening device obtains signal, gas generator 7 begins igniting, a large amount of high pressure gas that produce in igniting back; High pressure gas flow along cavity, promote piston 4 motions, are fixed on tooth bar 5 movement therewith on the piston support board 41; Engaging gear during tooth bar 6 motions; The rotation of gear driven reel is involved in holding in the storehouse of frame thereby will be wrapped in the outer ribbon of reel, reaches the effect of pre-tightening ribbon.
Claims (8)
1. a car belt gunpowder pre-tightening device comprises frame, reel, gear, cylinder and is arranged on piston, tooth bar; Cylinder interior offers an an actor's rendering of an operatic tune, is provided with piston in an actor's rendering of an operatic tune, also is provided with a support board on the piston, and an end of support board is connected with piston body, and tooth bar is arranged on the support board, and rack and pinion is meshed, and gear is meshed with reel; It is characterized in that: described cylinder shape is L shaped, and the part that wherein offers an actor's rendering of an operatic tune is length portion, and another part is a weak point portion; The short portion of cylinder offers a cavity, and this cavity communicates with an actor's rendering of an operatic tune and forms a L shaped cavity; This gunpowder pre-tightening device also includes the tightening cover of an inner hollow; Tightening cover is detachable with the port of cylinder weak point portion and cooperates; The inside of tightening cover cooperates the back to form the object placing cavity that can hold gas generator with the cavity of cylinder weak point portion, the apical position of tightening cover offers through hole; This pre-tightening device also includes a gas generator; Gas generator one end has the igniting joint; Other end storage gunpowder, an end of gas generator igniting joint exposes in air through through hole, and the other end that gas generator has gunpowder stretches in the cavity of cylinder weak point portion.
2. car belt gunpowder pre-tightening device according to claim 1; It is characterized in that: offer a shotpin groove on the piston body; The shotpin groove is arranged on piston body and support board bonded assembly one end; The shotpin groove is vertical with the sense of motion of piston, and cylinder wall opposite position place also is provided with a shotpin that matches with shotpin groove size.
3. car belt gunpowder pre-tightening device according to claim 1 and 2, it is characterized in that: the junction of described cylinder cavity and an actor's rendering of an operatic tune is a bevelled, and direction of tilt is towards cavity.
4. car belt gunpowder pre-tightening device according to claim 1 and 2; It is characterized in that: described tightening cover is a screw thread fit with detachable cooperation of the port of cylinder weak point portion; The inwall of tightening cover is provided with negative thread, and the port position of cylinder weak point portion is provided with outside thread.
5. car belt gunpowder pre-tightening device according to claim 3; It is characterized in that: described tightening cover is a screw thread fit with detachable cooperation of the port of cylinder weak point portion; The inwall of tightening cover is provided with negative thread, and the port position of cylinder weak point portion is provided with outside thread.
6. according to claim 1 or 2 or 5 described car belt gunpowder pre-tightening devices; It is characterized in that: one side described support board is near the registration mast that is provided with of cavity; The opposite position place offers a positioning groove on the tooth bar, and positioning groove is the location with registration mast and cooperates.
7. car belt gunpowder pre-tightening device according to claim 3; It is characterized in that: one side described support board is near the registration mast that is provided with of cavity; The opposite position place offers a positioning groove on the tooth bar, and positioning groove is the location with registration mast and cooperates.
8. car belt gunpowder pre-tightening device according to claim 4; It is characterized in that: one side described support board is near the registration mast that is provided with of cavity; The opposite position place offers a positioning groove on the tooth bar, and positioning groove is the location with registration mast and cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104607166A CN102514540A (en) | 2011-12-23 | 2011-12-23 | Propellant pre-tightening device of automobile safety belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104607166A CN102514540A (en) | 2011-12-23 | 2011-12-23 | Propellant pre-tightening device of automobile safety belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102514540A true CN102514540A (en) | 2012-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104607166A Pending CN102514540A (en) | 2011-12-23 | 2011-12-23 | Propellant pre-tightening device of automobile safety belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102514540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879371A (en) * | 2014-02-27 | 2014-06-25 | 上海和励信息科技有限公司 | Safety device and pre-tightened gas generator tank for same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641131A (en) * | 1993-10-25 | 1997-06-24 | Trw Repa Gmbh | Combined seat belt retractor and tensioner unit |
| US6435440B1 (en) * | 1999-10-06 | 2002-08-20 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Pretensioner |
| DE102006022840A1 (en) * | 2006-05-16 | 2007-11-22 | Trw Automotive Gmbh | Rack-and-pinion linear drive for tightening safety belt of motor vehicle, has meltable unit arranged in area of sealing between gas generator and housing, where unit is made of material such as polyethylene or methacrylate chalcone polymer |
| JP2009173087A (en) * | 2008-01-22 | 2009-08-06 | Tokai Rika Co Ltd | Drive mechanism and webbing take-up device |
| CN202368529U (en) * | 2011-12-23 | 2012-08-08 | 浙江赛凯车业有限公司 | Powder pre-loading device for automobile safety belt |
-
2011
- 2011-12-23 CN CN2011104607166A patent/CN102514540A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5641131A (en) * | 1993-10-25 | 1997-06-24 | Trw Repa Gmbh | Combined seat belt retractor and tensioner unit |
| US6435440B1 (en) * | 1999-10-06 | 2002-08-20 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Pretensioner |
| DE102006022840A1 (en) * | 2006-05-16 | 2007-11-22 | Trw Automotive Gmbh | Rack-and-pinion linear drive for tightening safety belt of motor vehicle, has meltable unit arranged in area of sealing between gas generator and housing, where unit is made of material such as polyethylene or methacrylate chalcone polymer |
| JP2009173087A (en) * | 2008-01-22 | 2009-08-06 | Tokai Rika Co Ltd | Drive mechanism and webbing take-up device |
| CN202368529U (en) * | 2011-12-23 | 2012-08-08 | 浙江赛凯车业有限公司 | Powder pre-loading device for automobile safety belt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879371A (en) * | 2014-02-27 | 2014-06-25 | 上海和励信息科技有限公司 | Safety device and pre-tightened gas generator tank for same |
| CN103879371B (en) * | 2014-02-27 | 2017-01-11 | 上海和励信息科技有限公司 | Safety device and pre-tightened gas generator tank for same |
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Application publication date: 20120627 |