CN104742857A - Safety belt retractor with pre-tightening device - Google Patents
Safety belt retractor with pre-tightening device Download PDFInfo
- Publication number
- CN104742857A CN104742857A CN201310742844.9A CN201310742844A CN104742857A CN 104742857 A CN104742857 A CN 104742857A CN 201310742844 A CN201310742844 A CN 201310742844A CN 104742857 A CN104742857 A CN 104742857A
- Authority
- CN
- China
- Prior art keywords
- pipe
- gear
- shaped plate
- tooth bar
- tightening apparatus
- Prior art date
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The invention relates to a safety belt retractor with a pre-tightening device. The safety belt retractor comprises a frame, winding shafts and the pre-tightening device. The pre-tightening device comprises a round pipe, a U-shaped plate, a force transmission ball set, a rack, a gear, a sealing ball, a spring, a gas generator and a housing. The round pipe is linked with the U-shaped plate and then is fixedly arranged in the housing; the linkage portion of the round pipe and the U-shaped plate is a linear segment portion, and one end, not linked with the U-shaped plate, of the round pipe is provided with the gas generator; the spring is arranged at one end, stretching into the round pipe, of the gear generator; and a long groove is formed in the linear segment portion of the round pipe, and the rack is fixedly arranged in the long groove. The sealing ball and the force transmission ball set are arranged in the round pipe and located between the spring and the rack; the gear and the winding shafts are coaxially and fixedly connected; and when the rack is fixed through a shearing pin, the rack and he gear are in the non-meshing state, and when the rack descends, the rack can be meshed with the gear. A plurality of force transmission components are utilized for carrying out energy efficient transmission, the retracting stroke of a safety belt is increased, and the retractor is simple in structure and low in manufacturing cost.
Description
Technical field
The present invention relates to a kind of Webbing retractor, particularly a kind of Webbing retractor with pre-tightening apparatus.
Background technology
The taking-up device of existing pre-tightening apparatus, has simple tooth bar promotion gear to rotate, and ball promotion gear, band engaging and disengaging gear, what have driven by motor spool waits pre-tightening apparatus.These technology are all widely applied in Webbing retractor, have fine constraint to passenger.When vehicle is in an emergency; utilize the gas of gas generator that the spool of Webbing retractor is rotated along safety strap backrush direction, by this spool backrush safety strap, make safety strap become tensioned from lax; thus the constrained force improved passenger, the safety of protection passenger.But it is short to have backrush stroke with the taking-up device of pre-tightening apparatus, complex structure in the past, manufacture difficulty, difficulty of processing is large, the defects such as cost is high, and taking-up device profile is excessive.
Summary of the invention
The object of this invention is to provide and a kind ofly utilize multiple power drive disk assembly to carry out the transmission of energy efficient, increase the Webbing retractor with pre-tightening apparatus of safety strap backrush stroke.
The technical scheme realizing the object of the invention is: the pre-tightening apparatus that the present invention includes framework, spool and be arranged on framework; Described pre-tightening apparatus comprises pipe, U-shaped plate, power transmission ball set, tooth bar, gear, ball sealer, spring, gas generator, case; Described pipe is fixedly installed in case after being connected with U-shaped plate, and the part that pipe is connected with U-shaped plate is straight length portion, and one end that pipe is not connected with U-shaped plate is provided with gas generator, and one end that gas generator stretches into pipe is provided with spring; The straight length portion of described pipe is provided with the elongated slot to U-shaped plate direction opening, and tooth bar is fixedly installed in elongated slot by the shear pin on case, and elongated slot and U-shaped plate form the passage that tooth bar can be supplied descending; Described ball sealer and power are transmitted ball set and to be arranged in pipe and between spring and tooth bar, and wherein ball sealer is arranged on power and transmits between ball set and spring; Described gear is coaxially fixedly connected with spool, when tooth bar is fixed by shear pin and gear be in non-engagement state, when tooth bar is descending can with gears meshing.
Above-mentioned ball sealer and pipe contact point are no more than the root of elongated slot all the time.
The periphery straight length portion of above-mentioned pipe being positioned at the top of elongated slot is provided with annular slot, and annular slot to coordinate through case and symmetrically arranged clamp and is positioned in case with two by pipe; Described pipe is provided with the opening square groove vertical with elongated slot with U-shaped plate cohesive end, and opening square groove coordinates with pipe locating piece and is positioned in case by pipe.
One end that above-mentioned pipe is provided with gas generator is provided with the threaded cap with its screw thread fit.
When above-mentioned tooth bar is fixed by shear pin, ball sealer and power transmission ball set are adjacent to and are arranged between spring and tooth bar.
Above-mentioned case is aluminium matter; Described ball sealer is quality of rubber materials; It is the metal material such as iron or aluminium that described power transmits ball set.
Said gear is profile shifting gear.
On above-mentioned case, riveted joint has base plate.
The present invention has positive effect: (1) the present invention adopts ball and tooth bar to combine, and the energy of various force transmission member can be suppressed to run off, can be delivered on spool efficiently, add safety strap backrush stroke; (2) structure of the present invention is simple, and dependable performance is cheap for manufacturing cost, has good pretensioning effect, and actv. improves pre-tightening apparatus to the constrained force of passenger; (3) pretension transmitting force of the present invention is faster, does not need to be transferred by engaging and disengaging gear, directly relies on rack and pinion engagement to drive spool backrush ribbon.
Accompanying drawing explanation
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation under off working state of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is exploded perspective figure of the present invention;
Fig. 4 is the structural representation after pretension of the present invention completes;
Fig. 5 is the structural representation of the straight length portion of pipe in the present invention.
Detailed description of the invention
See Fig. 1 to Fig. 5, the pre-tightening apparatus that the present invention includes framework 1, spool 2 and be arranged on framework 1; Described pre-tightening apparatus comprises pipe 3, U-shaped plate 4, power transmission ball set 5, tooth bar 6, gear 7, ball sealer 8, spring 9, gas generator 10, case 11; Described pipe 3 is fixedly installed in case 11 after being connected with U-shaped plate 4, the part that pipe 3 is connected with U-shaped plate 4 is straight length portion, one end that pipe 3 is not connected with U-shaped plate 4 is provided with gas generator 10, and one end that gas generator 10 stretches into pipe 3 is provided with spring 9; The straight length portion of described pipe 3 is provided with the elongated slot 31 to U-shaped plate 4 direction opening, and tooth bar 6 is fixedly installed in elongated slot 31 by the shear pin on case 11, and elongated slot 31 and U-shaped plate 4 form the passage that tooth bar 6 can be supplied descending; Described ball sealer 8 and power are transmitted ball set 5 and to be arranged in pipe 1 and between spring 9 and tooth bar 6, and wherein ball sealer 8 is arranged on power and transmits between ball set 5 and spring 9; Described gear 7 is coaxially fixedly connected with spool 2, when tooth bar 6 is fixed by shear pin and gear 7 be in non-engagement state, can engage with gear 7 when tooth bar 6 is descending; Described ball sealer 8 and the contact point of pipe 3 are no more than the root 31-1 of elongated slot 31 all the time, and such gas just can reduce leakage, thus reduce energy disappearance; The periphery straight length portion of described pipe 3 being positioned at the top of elongated slot 31 is provided with annular slot 32, and annular slot 32 to coordinate through case 11 and symmetrically arranged clamp 12 be positioned in case 11 by pipe 3 with two, prevents the radial displacement of pipe 3; Described pipe 3 is provided with the opening square groove 33 vertical with elongated slot 31 with U-shaped plate 4 cohesive end, and opening square groove 33 coordinates with pipe locating piece 13 and is positioned in case 11 by pipe 3, prevents the longitudinal travel of pipe 3; One end that described pipe 3 is provided with gas generator 10 is provided with the threaded cap 14 with its screw thread fit; When described tooth bar 6 is fixed by shear pin, ball sealer 8 and power transmission ball set 5 are adjacent to and are arranged between spring 9 and tooth bar 6, avoid the noise because displacement collision produces; Described case 11 is aluminium matter; Described ball sealer 8 is quality of rubber materials, and substantially reduce the leakage of gas, energy ezpenditure is little; It is the metal material such as iron or aluminium that described power transmits ball set 5; Described gear 7 is profile shifting gear; On described case 11, riveted joint has base plate.
When pretension, gas generator 10 action produces gas, and by generation gas to ball sealer 8 pressure, ball sealer 8 transfers the pressure to power and transmits ball set 5, and tooth bar 6 is subject to the pressing of power transmission ball set 5 and produces craspedodrome displacing force, and shear pin is just destroyed.Tooth bar 6 is descending thus engages rapidly with gear 7, and the craspedodrome displacing force of tooth bar 6 converts the rotational force of gear 7 to.Gear 7 rotates to spool 2 backrush direction, drives spool 2 backrush safety strap, thus reaches pretensioning effect.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. there is a Webbing retractor for pre-tightening apparatus, the pre-tightening apparatus comprising framework (1), spool (2) and be arranged on framework (1); It is characterized in that: described pre-tightening apparatus comprises pipe (3), U-shaped plate (4), power transmission ball set (5), tooth bar (6), gear (7), ball sealer (8), spring (9), gas generator (10), case (11); Described pipe (3) is fixedly installed on after being connected with U-shaped plate (4) in case (11), the part that pipe (3) is connected with U-shaped plate (4) is straight length portion, one end that pipe (3) is not connected with U-shaped plate (4) is provided with gas generator (10), and one end that gas generator (10) stretches into pipe (3) is provided with spring (9); The straight length portion of described pipe (3) is provided with the elongated slot (31) to U-shaped plate (4) direction opening, tooth bar (6) is fixedly installed in elongated slot (31) by the shear pin on case (11), and elongated slot (31) and U-shaped plate (4) form the passage that tooth bar (6) can be supplied descending; Described ball sealer (8) and power are transmitted ball set (5) and to be arranged in pipe (1) and to be positioned between spring (9) and tooth bar (6), and wherein ball sealer (8) is arranged between power transmission ball set (5) and spring (9); Described gear (7) is coaxially fixedly connected with spool (2), when tooth bar (6) is fixed by shear pin and gear (7) be in non-engagement state, can engage with gear (7) when tooth bar (6) is descending.
2. the Webbing retractor with pre-tightening apparatus according to claim 1, is characterized in that: described ball sealer (8) is no more than the root (31-1) of elongated slot (31) all the time with the contact point of pipe (3).
3. the Webbing retractor with pre-tightening apparatus according to claim 2, it is characterized in that: the periphery straight length portion of described pipe (3) being positioned at the top of elongated slot (31) is provided with annular slot (32), annular slot (32) to coordinate through case (11) and symmetrically arranged clamp (12) and is positioned in case (11) with two by pipe (3); Described pipe (3) and U-shaped plate (4) cohesive end are provided with the opening square groove (33) vertical with elongated slot (31), and opening square groove (33) coordinates with pipe locating piece (13) and is positioned in case (11) by pipe (3).
4. the Webbing retractor with pre-tightening apparatus according to claim 3, is characterized in that: one end that described pipe (3) is provided with gas generator (10) is provided with and the threaded cap of its screw thread fit (14).
5. the Webbing retractor with pre-tightening apparatus according to claim 4, is characterized in that: when described tooth bar (6) is fixed by shear pin, ball sealer (8) and power transmission ball set (5) are adjacent to and are arranged between spring (9) and tooth bar (6).
6. the Webbing retractor with pre-tightening apparatus according to claim 5, is characterized in that: described case (11) is aluminium matter; Described ball sealer (8) is quality of rubber materials; It is the metal material such as iron or aluminium that described power transmits ball set (5).
7., according to the Webbing retractor with pre-tightening apparatus of claim 1 to 6 described in one of them, it is characterized in that: described gear (7) is profile shifting gear.
8. the Webbing retractor with pre-tightening apparatus according to claim 7, is characterized in that: the upper riveted joint of described case (11) has base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310742844.9A CN104742857A (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor with pre-tightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310742844.9A CN104742857A (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor with pre-tightening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104742857A true CN104742857A (en) | 2015-07-01 |
Family
ID=53583307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310742844.9A Pending CN104742857A (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor with pre-tightening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104742857A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774749A (en) * | 2016-03-03 | 2016-07-20 | 东方久乐汽车电子（上海）有限公司 | Novel early-warning type safety belt |
| CN107685709A (en) * | 2016-08-03 | 2018-02-13 | 天合汽车科技（上海）有限公司 | Vehicle safety belt, pyrotechnic safety belt pretensioner and flexible barcode driving element |
| CN108883740A (en) * | 2016-02-17 | 2018-11-23 | 株式会社东海理化电机制作所 | Webbing take-up device |
-
2013
- 2013-12-30 CN CN201310742844.9A patent/CN104742857A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108883740A (en) * | 2016-02-17 | 2018-11-23 | 株式会社东海理化电机制作所 | Webbing take-up device |
| CN108883740B (en) * | 2016-02-17 | 2021-04-23 | 株式会社东海理化电机制作所 | Safety belt winding device |
| CN105774749A (en) * | 2016-03-03 | 2016-07-20 | 东方久乐汽车电子（上海）有限公司 | Novel early-warning type safety belt |
| CN107685709A (en) * | 2016-08-03 | 2018-02-13 | 天合汽车科技（上海）有限公司 | Vehicle safety belt, pyrotechnic safety belt pretensioner and flexible barcode driving element |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150701 |