CN103010151B - Pre-tensioning device for seat safety belt - Google Patents
Pre-tensioning device for seat safety belt Download PDFInfo
- Publication number
- CN103010151B CN103010151B CN201210538663.XA CN201210538663A CN103010151B CN 103010151 B CN103010151 B CN 103010151B CN 201210538663 A CN201210538663 A CN 201210538663A CN 103010151 B CN103010151 B CN 103010151B
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- China
- Prior art keywords
- piston rod
- castle wheel
- drive shaft
- axle drive
- cable body
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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.)
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- Automotive Seat Belt Assembly (AREA)
Abstract
The invention relates to a pre-tensioning device for a seat safety belt. The pre-tensioning device comprises a shell body, a drive shaft is arranged in the shell body and is connected with a woven strap reel of the safety belt in a coaxially rotating way, the pre-tensioning device also comprises an actuating mechanism used for driving the drive shaft to be rolled back during operation so as to tension a woven strap, a piston rod is provided with at least one limit slot, and the opening end of a piston channel is provided with a limit component arranged in the limit slot. The pre-tensioning device for the seat safety belt has the advantages of simple structure, easy manufacturing, simple operation and high reliability. In a safe state, a drive wheel is separated from the clutch and rotates freely along with the woven strap reel, the woven strap can be rolled back and tensioned promptly in the case of collision of vehicles, a passenger can be fixedly seated on a seat, the pre-tensioning effect can be achieved, the body can be prevented from leaning forwards, collision against a steering wheel, an instrument panel and a glass window can be avoided, and injury of the passenger can be reduced.
Description
The application is the applying date: 2011.06.28, application number: 201110176395.7, title: for the divisional application of the preloader of seatbelt.
Technical field
The present invention relates to safety belt for car seat technical field, especially a kind of preloader for seatbelt.
Background technology
As everyone knows, when automobile collides or run into undesirable emergency braking, huge inertial force will be produced, make the object generation secondary collisions such as the bearing circle in chaufeur, passenger and car, Windshield, back of seat, very easily cause the grievous injury to occupant, even occupant cast aside seat or dish out outside car.Driver and crew can be strapped on seat by safety strap, prevent secondary collision, and its buffer action then can absorb a large amount of kinetic energy, alleviate the extent of injury of driver and crew.
In order to the traveling comfort of occupant in routine techniques, the retracting power of safety strap is unsuitable excessive, but if the excessive clearance between safety strap and human body, when colliding, the gap of this existence reduces the effective range of safety strap, reduces the usefulness of safety strap.The feature of belt with pre-load device crashes in a flash when automobile, and when occupant not yet moves forward, first it can strain ribbon, occupant tied up tightly on the seat immediately, and then locking ribbon prevents occupant from leaning forward, the safety of available protecting occupant.The taking-up device played a major role in belt with pre-load device is different from common safety strap, except the folding and unfolding ribbon function of common taking-up device, also have when the speed of a motor vehicle occurs sharply to change, can strengthen the constrained force to occupant at about 0.1 second, therefore it also has control setup and pretension apparatus.
Control setup divides two kinds: one is electronic control device, and another kind is mechanical control device.Pretension apparatus then has various ways, and common pretension apparatus has metal ball driving and piston rod driving.Existing preloader complex structure, complicated operation, reliability is low.
Summary of the invention
The technical problem to be solved in the present invention is: in order to deficiency of the prior art, the invention provides a kind of preloader for seatbelt, connection cable body is pulled to make castle wheel contrarotation by piston rod, thus make axle drive shaft contrarotation make the backrush of ribbon spool, make occupant fixing on the seat while tightening up ribbon.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preloader for seatbelt, there is housing, the axle drive shaft be connected with the ribbon spool coaxial rotation of safety strap is provided with in housing, also comprise and operationally make axle drive shaft backrush thus the actuating unit of tensioning ribbon, described actuating unit comprises the power-transfer clutch be connected with axle drive shaft clutch, connect cable body and piston type push rod, described power-transfer clutch has the castle wheel coaxially arranged with axle drive shaft and the clutch block making castle wheel and axle drive shaft lock when castle wheel contrarotation, described housing is also provided with the pull back spring assembly making castle wheel forward rotation, described connection cable body one end is fixed on housing, and the other end connecting cable body is wrapped on castle wheel, described piston type push rod comprises piston channel, at the piston rod of piston channel inner carrier motion and the gas production unit of promotion piston rod movement, the external part of described piston rod contacts with connection cable body and connects, and makes connection cable body pull castle wheel contrarotation when piston rod stretches out, the maximum overhang of the consistent also limited piston bar in direction when stretching out for making piston rod, described piston rod has at least one position-limited trough, the two ends of position-limited trough correspond to range position and the minimum stroke position of piston rod respectively, and the open end of described piston channel has the locating part be arranged in position-limited trough.Locating part and position-limited trough coordinate direction when piston rod is stretched out constant, and make piston rod stop stretching out when making piston rod arrive maximum position.
Preferred clutch configuration, described castle wheel has the cavity holding clutch block, the thickness of described clutch block is thickening gradually on castle wheel contrarotation direction, and the inner side of clutch block is the circular arc corresponding to axle drive shaft, and the outside of clutch block is the circular arc corresponding to the inner side of castle wheel cavity.
Slide when promoting connection cable body for making piston rod smooth and easy, the external part of described piston rod is also provided with guide, described guide is semicolumn body or pulley, and described piston rod is connected near one end of gas production unit and the dynamic seal of piston channel inwall.
As preferably, described connection cable body is steel rope or the non-metal rope of flexible high strength.
The invention has the beneficial effects as follows, the preloader structure for seatbelt of the present invention is simple, and be easy to manufacture, simple to operate, reliability is high, and when safe condition, drive wheel and disengaging of clutch freely rotate with ribbon spool, and the folding and unfolding not affecting safety strap uses; Backrush can tighten up ribbon timely when collision happens, occupant be fixed and reaches pretensioning effect on the seat, prevent forward lean from avoiding colliding with bearing circle, instrument carrier panel and glass port, alleviate the extent of injury of driver and crew.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the contour structures schematic diagram of the preloader most preferred embodiment for seatbelt of the present invention;
Fig. 2 is the inner structure schematic diagram of the preloader most preferred embodiment for seatbelt of the present invention;
Fig. 3 is the structural representation of piston rod described in the present invention when being positioned at minimum stroke position and safe condition;
Fig. 4 is the structural representation of piston rod described in the present invention when being positioned at range position and Pre strained state;
Fig. 5 is the perspective view of clutch block described in the present invention;
Fig. 6 is the perspective view of castle wheel described in the present invention;
Fig. 7 is the plan sketch of clutch block described in the present invention.
In figure: 1. housing, 2. axle drive shaft, 3. connect cable body, 4. castle wheel, 5. clutch block, inside 51., outside 52.,
6. piston channel, 7. piston rod, 71. position-limited troughs, 72. locating parts, 8. gas production unit, 9. guide.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Fig. 1-7 is most preferred embodiments of the preloader for seatbelt of the present invention, there is housing 1, the axle drive shaft 2 be connected with the ribbon spool coaxial rotation of safety strap is provided with in housing 1, also comprise and operationally make axle drive shaft 2 backrush thus the actuating unit of tensioning ribbon, actuating unit comprises the power-transfer clutch be connected with axle drive shaft clutch, connect cable body 3 and piston type push rod, power-transfer clutch to have with axle drive shaft 2 the coaxial castle wheel 4 that arranges and makes when castle wheel 4 contrarotation castle wheel 4 and axle drive shaft 2 extrude and the clutch block 5 of locking, housing 1 is also provided with the pull back spring assembly making castle wheel 4 forward rotation, connecting cable body 3 one end is fixed on housing 1, and the other end connecting cable body 3 is wrapped on castle wheel 4, piston type push rod comprises piston channel 6, at the piston rod 7 of piston channel 6 inner carrier motion and the gas production unit 8 of promotion piston rod 7 movement, the external part of piston rod 7 contacts with connection cable body 3 and connects, and the moving direction of piston rod 7 makes connection cable body 3 pull castle wheel 4 contrarotation.The external part of piston rod 7 is also provided with guide 9, and guide 9 is semicolumn body or pulley, and piston rod 7 is connected near one end of gas production unit 8 and the dynamic seal of piston channel 6 inwall.Connect steel rope or non-metal rope that cable body 3 is flexible high strength.
As shown in Figure 3 and Figure 4, piston rod 7 has a position-limited trough 71, the two ends of position-limited trough 71 are respectively range position and the minimum stroke position of piston rod 7, and the open end of piston channel 6 has the locating part 72 be inserted in position-limited trough 71.
As shown in Fig. 5 Fig. 6 and Fig. 7, castle wheel 4 has the cavity that and volume corresponding with clutch block 5 shape is greater than clutch block 5, the thickness of clutch block 5 is thickening gradually on castle wheel 4 contrarotation direction, the inner side 51 of clutch block 5 is the circular arc corresponding to axle drive shaft 2, and the outside 52 of clutch block 5 is the circular arc corresponding to the inner side of castle wheel 4 cavity.
As shown in Figure 3, vehicle is when safe condition, and piston rod 7 is in minimum stroke position, and castle wheel 4 and axle drive shaft 2 are in released state, and pull back spring assembly makes the tensioning of castle wheel 4 forward; As shown in Figure 4, vehicle is when unsafe conditions such as collisions, gas generating unit 3 discharges gas push piston rod 7 and stretches out and be in range position, promote to connect cable body 3 to move, the Hui Li that connection cable body 3 overcomes pull back spring assembly pulls castle wheel 4 contrarotation and extrudes clutch block 5, clutch block 5 and axle drive shaft 2 are locked, thus make ribbon spool backrush tensioning, occupant and seat are fixed, the present invention can make ribbon reclaim more than 80mm, make occupant move 40-50mm, the injury to occupant when effectively can alleviate vehicle collision backward.
Claims (4)
1. the preloader for seatbelt, there is housing (1), the axle drive shaft (2) be connected with the ribbon spool coaxial rotation of safety strap is provided with in housing (1), also comprise the actuating unit operationally making axle drive shaft (2) backrush thus tensioning ribbon, it is characterized in that: described actuating unit comprise be connected with axle drive shaft clutch power-transfer clutch, connect cable body (3) and piston type push rod
Described power-transfer clutch has the coaxial castle wheel (4) arranged and the clutch block (5) making castle wheel (4) and axle drive shaft (2) lock when castle wheel (4) contrarotation with axle drive shaft (2), and described housing (1) is also provided with the pull back spring assembly making castle wheel (4) forward rotation;
Described connection cable body (3) one end is fixed on housing (1), and the other end connecting cable body (3) is wrapped on castle wheel (4);
Described piston type push rod comprises piston channel (6), at the piston rod (7) of piston channel (6) inner carrier motion and the gas production unit (8) of promotion piston rod (7) movement, the external part of described piston rod (7) contacts with connection cable body (3) and connects, and makes connection cable body (3) pull castle wheel (4) contrarotation when piston rod (7) stretches out;
Described piston rod (7) has at least one position-limited trough (71), the two ends of position-limited trough (71) correspond to range position and the minimum stroke position of piston rod (7) respectively, and the open end of described piston channel (6) has the locating part (72) be arranged in position-limited trough (71).
2. as claimed in claim 1 for the preloader of seatbelt, it is characterized in that: described castle wheel (4) has the cavity (41) of accommodation clutch block (5), the thickness of described clutch block (5) is thickening gradually on castle wheel (4) contrarotation direction, the inner side (51) of clutch block (5) is corresponding circular arc with axle drive shaft (2), and the outside (52) of clutch block (5) is the corresponding circular arc in inner side with castle wheel (4) cavity.
3. as claimed in claim 1 for the preloader of seatbelt, it is characterized in that: the external part of described piston rod (7) is also provided with guide (9), described guide (9) is semicolumn body or pulley, and described piston rod (7) is connected near one end of gas production unit (8) and piston channel (6) inwall dynamic seal.
4. as claimed in claim 1 for the preloader of seatbelt, it is characterized in that: described connection cable body (3) is steel rope or the non-metal rope of flexible high strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538663.XA CN103010151B (en) | 2011-06-28 | 2011-06-28 | Pre-tensioning device for seat safety belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538663.XA CN103010151B (en) | 2011-06-28 | 2011-06-28 | Pre-tensioning device for seat safety belt |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110176395 Division CN102303580B (en) | 2011-06-28 | 2011-06-28 | Pre-tensioner used for safety seat belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103010151A CN103010151A (en) | 2013-04-03 |
| CN103010151B true CN103010151B (en) | 2015-06-10 |
Family
ID=47959426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210538663.XA Expired - Fee Related CN103010151B (en) | 2011-06-28 | 2011-06-28 | Pre-tensioning device for seat safety belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103010151B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103223919A (en) * | 2013-05-08 | 2013-07-31 | 黄绍勇 | Automobile safety belt pretensioner |
| CN105966345A (en) * | 2016-07-13 | 2016-09-28 | 芜湖金安世腾汽车安全系统有限公司 | Automotive pre-tightening safety belt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2809587A1 (en) * | 1977-03-09 | 1978-09-14 | Britax Wingard Ltd | TENSIONING DEVICE FOR A SAFETY BELT |
| CN1077166A (en) * | 1992-03-05 | 1993-10-13 | Trw莱帕有限公司 | The linear drive that vehicle occupant protection system is used |
| CN1480361A (en) * | 2003-08-07 | 2004-03-10 | 傅丹人 | Seat belt strainer with one way steel cable brake |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649087B2 (en) * | 1986-04-01 | 1994-06-29 | 横浜ゴム株式会社 | Golf ball |
-
2011
- 2011-06-28 CN CN201210538663.XA patent/CN103010151B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2809587A1 (en) * | 1977-03-09 | 1978-09-14 | Britax Wingard Ltd | TENSIONING DEVICE FOR A SAFETY BELT |
| CN1077166A (en) * | 1992-03-05 | 1993-10-13 | Trw莱帕有限公司 | The linear drive that vehicle occupant protection system is used |
| CN1480361A (en) * | 2003-08-07 | 2004-03-10 | 傅丹人 | Seat belt strainer with one way steel cable brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103010151A (en) | 2013-04-03 |
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Granted publication date: 20150610 Termination date: 20180628 |
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| CF01 | Termination of patent right due to non-payment of annual fee |