CN206141493U - Pretightening device of safety belt - Google Patents

Abstract

The utility model is suitable for a safety belt field provides a pretightening device of safety belt, including belt buckle, rope, gas generator, cylinder pipe, guide bracket, from locking -type piston, seal cover and valve body, to offer in the valve body and supply first through -hole that the rope passed and cooperation holding gas generator's holding chamber, the seal cover is installed in first through -hole, offers the gas pocket of intercommunication holding chamber and cylinder pipe in the valve body. Through setting up the valve body, set up first through -hole in the valve body to pass through the rope, install the seal cover in first through -hole, set up the holding chamber in the valve body to fixed gas generator offers the gas pocket in the valve body, the gas that gas generator produced can get into the cylinder pipe in the channel qi hole, in order to promote from the locking -type piston. And the valve body is installed in the cylinder pipe, can fix gas generator in the cylinder pipe, prevents effectively that gas generator is not hard up and exposes to better protective gas generator prevents to take place to interfere to the assembly part on the seat.

Description

Seat belt pretensioners

Technical field

This utility model belongs to seat belt field, more particularly to a kind of seat belt pretensioners.

Background technology

Car belt is a kind of protection device of protection driver and crew safety, when automobile occurs the moment of accident collision, Driver and passenger are leaned forward due to inertia, despite the protective effect of seat belt, as seat belt leaves active strokes, Collide the middle injury for being necessarily subject to multiple directions of jolting to threaten.And the effect of seat belt pretensioners is occurred surprisingly in automobile The moment of collision, when occupant not yet moves forward, it can tense seat belt first, tightly tie up on the seat, so occupant immediately Locking seat belt prevents occupant from leaning forward afterwards, the safety of effective protection occupant.Current belt pre-tightening apparatus generally comprise use The rope that is connected with bracelet in the bracelet, one end that are connected with seat belt, gas generator, cylinder conduit, for supporting cylinder to lead Pipe simultaneously carries out the guiding trestle of break-in, coordinates the self-locking piston being installed in cylinder conduit, the other end Jing of rope to rope Guiding trestle becomes backward, is connected with the self-locking piston in cylinder conduit, and cylinder conduit is installed near one end of guiding trestle Sealing shroud, the gas outlet of gas generator are located between sealing shroud and self-locking piston.Gas generator detonation, gas enter gas Conduit pipe, promotes self-locking piston to move in cylinder conduit, to tense rope；When air-inflated pressure is not enough to overcome rope During suffered pulling force, self-locking piston is locked in cylinder conduit, prevents rope to be pulled.

But the gas generator of current belt pre-tightening apparatus is arranged in cylinder conduit by two baffle plates, is easily loosened With expose, the Assembly part on seat can be interfered.

Utility model content

The purpose of this utility model is to provide a kind of seat belt pretensioners, it is intended to solve existing seat belt pretensioners Gas generator in cylinder conduit easily loosen and expose, the problem that the Assembly part on seat can be interfered.

This utility model is achieved in that a kind of seat belt pretensioners, including the bracelet for being connected with seat belt, Rope, gas generator, cylinder conduit, for support the cylinder conduit and the rope is carried out break-in guiding trestle, Self-locking piston and be installed on the cylinder conduit near described guiding trestle one end that cooperation is installed in the cylinder conduit Sealing shroud, one end of the rope is connected with the bracelet, and guiding trestle break-in described in the other end Jing of the rope is laggard Enter through the sealing shroud and be connected with the self-locking piston；The seat belt pretensioners are also plugged in the gas including cooperation Valve body of the conduit pipe in one end of the guiding trestle, offers in the valve body and leads to for the rope is passed through first Hole, the sealing shroud are installed in the first through hole, are further opened with coordinating the accommodating gas generator on the valve body Containing cavity, the valve body offer the gas of the connection containing cavity and the cylinder conduit near one end of the self-locking piston Hole.

Further, the cylinder conduit is placed on the pipe on the valve body near one end of the guiding trestle with cooperation Set, the internal diameter of the pipe box are more than the internal diameter of the cylinder conduit other end.

Further, the first through hole includes coordinating the first paragraph passed through for the rope and coordinating housing the sealing The second segment of set, the internal diameter of the internal diameter of the second segment more than the first paragraph, the second segment be located at the first paragraph away from One end of the guiding trestle.

Further, also including the blocking for preventing the sealing shroud from coming off from the first through hole, the blocking is installed on The one end of the second segment away from the first paragraph, offers the second through hole passed through for the rope in the blocking.

Further, the first through hole also includes coordinating the 3rd section that installs the blocking, and the second segment is located at institute State first paragraph and it is described 3rd section between, the internal diameter of described 3rd section of internal diameter more than the second segment.

Further, described 3rd section is provided with female thread, and the blocking is provided with the external screw thread with the screw-internal thread fit.

Further, the valve body is provided with for fixing the riveting of the gas generator away from one end of the pore Portion.

Further, the guiding trestle is included for guiding the guided rings of the rope break-in, by one piece of panel beating bending And clamp two backplates of the guided rings with the bending plate for being connected two backplates and two backplates are fixed on into institute The fixture of guided rings both sides is stated, the fixture passes through the guided rings, corresponding to the guided rings on each backplate Position offers the perforate passed through for the fixture, and each backplate is provided with for connecting the connection of the cylinder conduit Plate, has the passage passed through for the rope between the bending plate and the guided rings.

Further, the guided rings and a backplate are to be integrally formed；Or the guided rings and the fixation Part is to be integrally formed.

Further, the guiding trestle also includes what is formed towards backplate bending another described by a backplate For limiting the limiting plate of the rope break-in angle.

This utility model is arranged on valve body in cylinder conduit, first through hole is arranged in valve body by arranging valve body, with Just rope is passed through, and is connected with self-locking piston, and sealing shroud is arranged in first through hole；And open up in valve body accommodating Chamber, is installed and fixed gas generator with facilitating, and pore is opened up in valve body, and the gas that gas generator is produced can be with Jing pores Into cylinder conduit, to promote self-locking piston.And valve body is arranged in cylinder conduit, such that it is able to gas generator is fixed In cylinder conduit, effectively prevent gas generator from loosening and exposing, with more preferable protective gas generator, prevent on seat Assembly part interfere.

Description of the drawings

Fig. 1 is a kind of broken section structural representation of seat belt pretensioners that this utility model embodiment one is provided；

Fig. 2 is the decomposition texture schematic diagram of the seat belt pretensioners of Fig. 1；

Fig. 3 is the cross section structure diagram of valve body in Fig. 2；

Fig. 4 is the mplifying structure schematic diagram blocked in Fig. 2；

Fig. 5 is the mplifying structure schematic diagram of guiding trestle in Fig. 2；

Fig. 6 is the positive structure diagram of the guiding trestle of Fig. 5；

Fig. 7 is the cross section structure diagram along Fig. 6 center line A-A；

Fig. 8 is the enlarged diagram of self-locking piston decomposition texture in Fig. 2.

Fig. 9 is that the sectional structure of guiding trestle in a kind of seat belt pretensioners that this utility model embodiment two is provided shows It is intended to.

Specific embodiment

In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain This utility model, is not used to limit this utility model.

Describe for convenience, defined in this utility model：Cylinder conduit and each part in cylinder conduit, it is close One end of guiding trestle is front end, and its other end is rear end.

Embodiment one：

Refer to Fig. 1 to Fig. 8, a kind of seat belt pretensioners 100, including bracelet 11, rope 12, gas generator 15, Cylinder conduit 14, guiding trestle 20, self-locking piston 50, sealing shroud 41 and valve body 30.Bracelet 11 is restricted for being connected with seat belt One end of rope 12 is connected with bracelet 11, and the other end Jing guiding trestles 20 of rope 12 become back into through sealing shroud 41 and self-locking Formula piston 50 is connected.Gas generator 15 is produced for detonation, and gas enters cylinder conduit 14, promotes self-locking piston 50 in gas Move in conduit pipe 14, to tense rope 12.The cooperation of self-locking piston 50 is installed in cylinder conduit 14, and self-locking piston 50 can slide in cylinder conduit 14.Guiding trestle 20 is connected with cylinder conduit 14, for supporting cylinder conduit 14, while rope Rope 12 carries out break-in guiding.Sealing shroud 41 is installed on cylinder conduit 14 near 20 one end of guiding trestle, prevents gas generator 15 The gas of generation is released from cylinder conduit 14 near one end of guiding trestle 20, and then preferably promotes self-locking piston 50 in gas Slide in conduit pipe 14.The cooperation of valve body 30 is plugged in cylinder conduit 14 in one end of guiding trestle 20, opens up in valve body 30 There is first through hole 31, rope 12 can be passed through from first through hole 31, and sealing shroud 41 is installed in first through hole 31, so as to incite somebody to action First through hole 31 is sealed, and then cylinder conduit 14 is sealed near one end of guiding trestle 20.It is further opened with housing in valve body 30 Chamber 32, to coordinate accommodating and install gas generator 15, and then gas generator 15 is fixed in cylinder conduit 14.Valve body 30 In offer pore 33, pore 33 is located on valve body 30 near one end of self-locking piston 50, and the connection containing cavity 32 of pore 33 With cylinder conduit 14, so as to the gas that gas generator 15 is produced can be entered in cylinder conduit 14 from pore 33, and then promote Self-locking piston 50 is moved.

By arranging valve body 30, valve body 30 is arranged in cylinder conduit 14, first through hole 31 is set in valve body 30, with Just rope 12 is passed through, and is connected with self-locking piston 50, and sealing shroud 41 is arranged in first through hole 31；And in valve body 30 In open up containing cavity 32, with facilitate install with fixed gas generator 15, pore 33, gas generator 15 are opened up in valve body 30 The gas of generation can enter cylinder conduit 14 with Jing pores 33, to promote self-locking piston 50.And valve body 30 is led installed in cylinder In pipe 14, such that it is able to gas generator 15 is fixed in cylinder conduit 14, effectively prevent gas generator 15 from loosening and outer Dew, with more preferable protective gas generator 15, prevents from interfering the Assembly part on seat.

Specifically, rope 12 is wirerope, so that rope 12 has larger intensity.

Fig. 1 and Fig. 2 is referred to, the seat belt pretensioners 100 also include adapter sleeve 13, and adapter sleeve 13 is for by rope 12 It is connected with bracelet 11.Adapter sleeve 13 is set, can be facilitated and rope 12 is connected with bracelet 11, while can be risen by adapter sleeve 13 To the effect of 12 end part of protection rope.

Further, cylinder conduit 14 is more than near the internal diameter that one end of guiding trestle 20 has pipe box 141, pipe box 141 The internal diameter of 14 other end of cylinder conduit.Pipe box 141 is placed on valve body 30 for coordinating.Pipe box 141 is set, installs solid to facilitate Determine valve body 30, while can play a part of to protect valve body 30, reduce exposing for part, and then avoid to the assembling zero on seat Part is interfered.

Fig. 1, Fig. 2 and Fig. 3 are referred to, the first through hole 31 of valve body 30 includes first paragraph 311 and second segment 312, second segment Internal diameter of 312 internal diameter more than first paragraph 311, second segment 312 are located at the one end of first paragraph 311 away from guiding trestle 20.First 311 cooperation of section is passed through for rope 12, and sealing shroud 41 coordinates in second segment 312.Second segment 312 is set, to facilitate peace Dress sealing shroud 41.The internal diameter of second segment 312 is arranged into the internal diameter more than first paragraph 311 simultaneously, when the production of gas generator 15 When gas is entered in cylinder conduit 14, sealing shroud 41 can be promoted, and the first paragraph 311 of first through hole 31 can be with backstop sealing shroud 41, and then spacing effect is played to sealing shroud 41.

Fig. 4 is seen also, the seat belt pretensioners 100 also include blocking 42, and it is remote that blocking 42 is installed on second segment 312 The second through hole 421 passed through for rope 12 is offered in one end of first paragraph 311, blocking 42.Blocking 42 is used to prevent sealing Set 41 comes off from first through hole 31.Blocking 42 is set, with preferably by 41 location and installation of sealing shroud in first through hole 31.Separately Outward, blocking 42 is set, sealing shroud 41 can be placed restrictions on and moved towards the direction of self-locking piston 50, while preventing sealing shroud 41 direct By high-temperature gas calcination.

Further, first through hole 31 also includes the 3rd section 313, and second segment 312 is located at first paragraph 311 and the 3rd section 313 Between, the 3rd section 313 of internal diameter is more than the internal diameter of second segment 312.The 3rd section 313 is arranged, blocking 42 is installed to coordinate.By the 3rd The internal diameter of section 313 arranges the internal diameter more than second segment 312, you can sealing shroud 41 is positioned over second from the 3rd section 313 to facilitate In section 312, while being also convenient for installing blocking 42, also allow for positioning blocking 42.

Further, it is provided with female thread 314 for the 3rd section 313, blocking 42 is provided with the external screw thread coordinated with female thread 314 422.In the 3rd section 313 of first through hole 31 arrange female thread 314, and blocking 42 on arrange external screw thread 422, with facilitate by Blocking 42 is arranged in valve body 30.Further, limiting stand 423, the external screw thread 422 in blocking 42 are convexly equipped with blocking 42 In the side of limiting stand 423.Limiting stand 423 is set, coordinates the stroke in the 3rd section 313 for limiting external screw thread 422. Further, blocking 42 can support self-locking piston 50 away from one end of external screw thread 422, install blocking 42 and self-locking to facilitate Formula piston 50..

Further, valve body 30 is provided with the caulking part 34 for fixed gas generator 15 away from one end of pore 33. Caulking part 34 is set on valve body 30, gas generator 15 is fixed in containing cavity 32 with facilitating.

Fig. 5, Fig. 6 and Fig. 7 are referred to, guiding trestle 20 includes guided rings 21, two backplates 22, bending plate 23 and fixtures 24, guided rings 21 are used to guide 12 break-in of rope.Two backplates 22 are formed by one piece of panel beating bending with bending plate 23, two backplates 22 clamping guided rings 21, make guided rings 21 be located between two backplates 22, and bending plate 23 connects two backplates 22.Fixture 24 is used In two backplates 22 are fixed on 21 both sides of guided rings.Specifically, the position on each backplate 22 corresponding to guided rings 21 offers Perforate 222, fixture 24 can pass through the perforate 222 on each backplate 22, and pass through guided rings 21, and two backplates 22 are fixed In the both sides of guided rings 21.There is passage 231, so that rope 12 can be from the passage 231 between bending plate 23 and guided rings 21 In pass through.Connecting plate 221 is respectively equipped with each backplate 22, connecting plate 221 is set, is connected with cylinder conduit 14 with facilitating, so as to It is connected with cylinder conduit 14 by the guiding trestle 20, to support cylinder conduit 14.By two backplates 22 and bending plate 23 are formed using one piece of panel beating bending, and processing and fabricating is convenient, simple, and intensity is high.In further embodiments, casting is produced Two backplates 22 and bending plate 23.

Further, in the present embodiment, fixture 24 is piercing rivet, by passing through rivet by two 22 fixing phases of backplate Even.In other embodiments, fixture 24 can also be bolt arrangement etc..

Further, guiding trestle 20 also include by a backplate 22 towards another 22 bending of backplate formed for limiting Determine the limiting plate 223 of 12 break-in angle of rope.Limiting plate 223 is set, the bending angle of rope 12 can be limited, to meet design Require.

Further, guided rings 21 and a backplate 22 are to be integrally formed.Guided rings 21 are designed to a backplate 22 It is integrally formed, to increase its bonding strength.Specifically can by metal plate punching molding backplate 22 when, directly stamp out guided rings 21, The structure processing is simple, intensity is high.

Further, guiding trestle 20 also includes surrounding plate 224, and rope 12 passes through between plate 224 and guided plate from surrounding, Rope 12 is protected so as to by surrounding plate 224.Surrounding plate 224 can be by a backplate 22 towards another 22 bending of backplate Into.In the present embodiment, it is two pieces to surround plate 224, is formed towards two backplates, the 22 middle bending by two backplates 22 respectively.

Further, surround plate 224 to be located between limiting plate 223 and bending plate 23, such that it is able to pass through bending plate 23, bag Coaming plate 224 and limiting plate 223 are protecting rope 12, and spacing rope 12.

Fig. 1, Fig. 2 and Fig. 8 are referred to, further, in the present embodiment, self-locking piston 50 includes piston 51, Ruo Gangang Pearl 53 and sealing ring 52.Piston 51 is slidably mounted in cylinder conduit 14, so that gas can promote piston 51 in cylinder conduit Slide in 14.The front end of piston 51 offers the first endless groove 512, and the rear end of piston 51 offers the second endless groove 511, and first Side wall 513 of the endless groove 512 near 511 side of the second endless groove is in conical surface-shaped, and some steel balls 53 are installed in the first endless groove In 512, and some steel balls 53 are to be arranged in the first endless groove 512, to carry out rolling slip in a ring.52 sets of sealing ring It is mounted in the second endless groove 511, to play sealing function.The structure, when the blast of gas generator 15 produces gas, gas enters Enter cylinder conduit 14, promote piston 51 to slide to the rear end of cylinder conduit 14, to tense rope 12, and then tense seat belt；When To pull during seat belt, piston 51 can be moved the insufficient pressure of gas to the front end of cylinder conduit 14, due to the first endless groove 512 Side wall 513 near 511 side of the second endless groove is in conical surface-shaped, and each steel ball 53 in the first endless groove 512 can be in inertia Under direction from effect to taper seat move, then now can each steel ball 53 of jack-up, make steel ball 53 support the inwall of cylinder conduit 14, prevent Only piston 51 is moved, and realizes auto-lock function.

Further, the self-locking piston 50 also includes cushion 54, and cushion 54 is sleeved in the first endless groove 512, And cushion 54 is located at side of each steel ball 53 away from the second endless groove 511.Cushion 54 is installed in the first endless groove 512, And make cushion 54 be located at side of each steel ball 53 away from the second endless groove 511, move to the rear end of cylinder conduit 14 in piston 51 When dynamic, cushion 54 can play a part of buffering, preferably to promote steel ball 53 to move, play a part of to protect steel ball 53. Certainly in some other embodiment, it is also possible to be not provided with cushion 54.Specifically, sealing ring 52 can be O-ring, to reduce Cost.

Further, the seat belt pretensioners 100 also include tail end locating part 43, and tail end locating part 43 is remote with rope 12 One end from bracelet 11 is fixedly linked.The perforation 514 passed through for rope 12 is offered in self-locking piston 50, rope 12 can be worn Cross the perforation 514 to be fixedly linked with tail end locating part 43.Tail end locating part 43 is set, is connected with rope 12 with facilitating, and then will Rope 12 is fixedly linked with self-locking piston 50.It is possible to further by tail end locating part 43 and 50 fixing phase of self-locking piston Even.

Specifically, above-mentioned perforation 514 is opened in piston 51, and is threaded hole in the rear end of piston 51 (in figure not Mark), and stud 431 is set on tail end locating part 43, tail end locating part 43 is fixedly linked with piston 51 with facilitating.When So, in some other embodiment, it is also possible to taper hole is set in the rear end of piston 51, and is coordinated in the front end of tail end locating part 43 It is convex that cone is set, as tail end locating part 43 is connected with rope 12, when boring in convex insertion taper hole, in rope 12 and cylinder conduit 14 Air pressure can promote piston 51, so as to tail end locating part 43 is fixedly linked with piston 51, while playing a part of to be automatically positioned.

Further, limiting stand 432 is also convexly equipped with tail end locating part 43, stud 431 is located at limiting stand 432 near piston 51 side.Limiting stand 432 is set on tail end locating part 43, tail end locating part 43 can be limited with 51 rear end face of backstop piston The stroke being installed in the perforation 514 of piston 51.

Embodiment two：

Refer to Fig. 9, the seat belt pretensioners of the present embodiment and being distinguished as the seat belt pretensioners of embodiment one：

Fig. 2 is seen also, in the present embodiment, guided rings 21b are integrally formed with fixture 24b.Specifically, when solid Determine part 24b for rivet when, guided rings 21b are located at the middle part of rivet, and the two ends of rivet are each passed through the perforate of two backplate 22b 222b, then outwards overturn, to compress the lateral surface of each backplate 22b, two backplate 22b are clamped.

When fixture 24b is screw-rod structure, guided rings 21b may be located at the middle part of screw rod, and its two ends passes through two backplates Perforate 222b on 22b, then nut is respectively mounted at the two ends of screw rod, with two backplate 22b of fixed clamp.

Other knots of the other structures of the seat belt pretensioners of the present embodiment and the seat belt pretensioners of embodiment one Structure is identical, is repeating no more.

Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model Protection domain within.

Claims (10)

1. a kind of seat belt pretensioners, including the bracelet for being connected with seat belt, rope, gas generator, cylinder conduit, It is installed in the cylinder conduit for supporting the cylinder conduit and the guiding trestle of break-in, cooperation being carried out to the rope Self-locking piston and it is installed on sealing shroud of the cylinder conduit near described guiding trestle one end, one end of the rope and institute State bracelet to be connected, guiding trestle described in the other end Jing of the rope becomes back into through the sealing shroud and the self-locking Piston is connected；Characterized in that, the seat belt pretensioners are also plugged in the cylinder conduit including cooperation leading near described Valve body in one end of support, offers the first through hole passed through for the rope in the valve body, the sealing shroud is installed In the first through hole, it is further opened with coordinating the containing cavity for housing the gas generator, the valve body to lean on the valve body One end of the nearly self-locking piston offers the pore of the connection containing cavity and the cylinder conduit.

2. seat belt pretensioners as claimed in claim 1, it is characterised in that the cylinder conduit is near the guiding trestle One end be placed on pipe box on the valve body with coordinating, the internal diameter of the pipe box is interior more than the cylinder conduit other end Footpath.

3. seat belt pretensioners as claimed in claim 1, it is characterised in that the first through hole includes coordinating for the rope First paragraph and coordinate the second segment for housing the sealing shroud that rope is passed through, the internal diameter of the second segment is interior more than the first paragraph Footpath, the second segment are located at the one end of the first paragraph away from the guiding trestle.

4. seat belt pretensioners as claimed in claim 3, it is characterised in that also including preventing the sealing shroud from described The blocking that one through hole comes off, the blocking are installed on the one end of the second segment away from the first paragraph, open up in the blocking There is the second through hole passed through for the rope.

5. seat belt pretensioners as claimed in claim 4, it is characterised in that the first through hole also includes coordinating installing institute State blocking the 3rd section, the second segment be located at the first paragraph and it is described 3rd section between, described 3rd section of internal diameter is more than The internal diameter of the second segment.

6. seat belt pretensioners as claimed in claim 5, it is characterised in that described 3rd section is provided with female thread, described stifled The external screw thread with the screw-internal thread fit is provided with beyond the Great Wall.

7. seat belt pretensioners as described in any one of claim 1-6, it is characterised in that the valve body is away from the pore One end be provided with for fixing the caulking part of the gas generator.

8. seat belt pretensioners as described in any one of claim 1-6, it is characterised in that the guiding trestle include for The guided rings of the rope break-in are guided, by one piece of panel beating bending and two backplates of the guided rings is clamped and is connected two institutes The bending plate for stating backplate and the fixture that two backplates are fixed on the guided rings both sides, the fixture pass through described Guided rings, the position on each backplate corresponding to the guided rings offer the perforate passed through for the fixture, each described Backplate is provided with for connecting the connecting plate of the cylinder conduit, is had for the rope between the bending plate and the guided rings The passage that rope passes through.

9. seat belt pretensioners as claimed in claim 8, it is characterised in that the guided rings and a backplate are It is body formed；Or the guided rings and the fixture are to be integrally formed.

10. seat belt pretensioners as claimed in claim 8, it is characterised in that the guiding trestle is also included by an institute State the limiting plate for limiting the rope break-in angle that backplate is formed towards backplate bending another described.