CN111114487A - Pre-tightening type secondary force limiting retractor and safety belt device - Google Patents
Pre-tightening type secondary force limiting retractor and safety belt device Download PDFInfo
- Publication number
- CN111114487A CN111114487A CN202010048917.4A CN202010048917A CN111114487A CN 111114487 A CN111114487 A CN 111114487A CN 202010048917 A CN202010048917 A CN 202010048917A CN 111114487 A CN111114487 A CN 111114487A
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- CN
- China
- Prior art keywords
- force limiting
- force
- steel wire
- pretensioned
- groove
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- 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
- B60R2022/4666—Reels with means to tension the belt in an emergency by forced winding up characterised by electric actuators
Abstract
The invention provides a pre-tightening type two-stage force-limiting retractor and a safety belt device, wherein the pre-tightening type two-stage force-limiting retractor comprises: the force limiting device comprises a force limiting steel wire, a force limiting rod, a fixed shaft, a pre-tightening wheel, a ratchet ring and a moving shaft; one end of the force limiting rod is fixed on the fixed shaft, and the other end of the force limiting rod extends into the first accommodating groove in the movable shaft and is limited in the first accommodating groove; the end of one end of the force limiting steel wire is fixed on the fixed shaft, and the other end of the force limiting steel wire sequentially penetrates through the fixed shaft, the ratchet ring and the pre-tightening wheel and then extends into a second accommodating groove in the movable shaft; when the movable shaft rotates, the force limiting rod is driven to synchronously rotate, the force limiting steel wire is driven to be pulled out of the second accommodating groove and wound on the fixed shaft, and the groove in the fixed shaft provides an accommodating space for the wound force limiting steel wire; the pre-tightening function can be realized, the force limiting rod and the force limiting steel wire are matched to realize the secondary force limiting function, the pre-tightening function enables a passenger to be tightly attached to the seat in case of emergency braking, frontal collision or rolling of the automobile, and the secondary force limiting function reduces the injury degree of the chest of the passenger.
Description
Technical Field
The invention relates to the technical field of safety belts, in particular to a pre-tightening type two-stage force limiting retractor and a safety belt device.
Background
The safety belt is made by the very big synthetic fiber of intensity, has the coiler that has self-locking function, and after fastening the safety belt, the coiler is automatic take it taut, in case emergency braking, head-on collision appear or when taking place to roll when the vehicle, the passenger can make the safety belt receive quick and violent tensile, and the self-locking function of coiler can block the safety belt in the twinkling of an eye at this moment, makes the passenger hug closely the seat, avoids falling out the car or the collision is injured.
However, most of the seat belt apparatus products on the market are prone to damage due to the large tension of the seat belt on the chest of the occupant in the event of sudden braking, a frontal collision, or a rollover of the vehicle.
Disclosure of Invention
The invention aims to provide a pre-tightening type two-stage force-limiting retractor and a safety belt device, and aims to solve the problem that the chest of a passenger is greatly pulled by a safety belt in case of emergency braking, frontal collision or rolling of a vehicle in most safety belt device products in the market in the prior art.
In order to solve the above technical problem, the present invention provides a pretensioned secondary force-limiting retractor, including:
the force limiting device comprises a force limiting steel wire, a force limiting rod, a fixed shaft, a pre-tightening wheel, a ratchet ring and a moving shaft;
one end of the force limiting rod is fixed on the fixed shaft, and the other end of the force limiting rod extends into the first accommodating groove in the movable shaft and is limited in the first accommodating groove;
the end of one end of the force limiting steel wire is fixed on the fixed shaft, and the other end of the force limiting steel wire sequentially penetrates through the fixed shaft, the ratchet ring and the pre-tightening wheel and then extends into a second accommodating groove in the movable shaft;
when the moving shaft rotates, the force limiting rod is driven to rotate synchronously, the force limiting steel wire is driven to be pulled out of the second accommodating groove and wound on the fixed shaft, and the groove in the fixed shaft provides an accommodating space for the wound force limiting steel wire.
Optionally, a first hole is drilled at the position with the maximum material thickness of the ball concave edge of the pre-tightening wheel, the first hole is visible from the ball concave in the middle of the pre-tightening wheel, and the force limiting steel wire penetrates through the first hole.
Optionally, a chamfer reaming structure is arranged at a position where the first hole penetrates through the force limiting steel wire.
Optionally, a chamfer structure is arranged at the notch of the second accommodating groove.
Optionally, the length of the force limiting steel wire is greater than or equal to a half turn and less than or equal to a turn of the fixed shaft after being pulled out of the second accommodating groove.
Optionally, the force limit lever rotates 2 times.
Optionally, the moving shaft includes the first receiving groove and an annular flange at one end of the first receiving groove; the second receiving groove includes a first through hole portion located in the annular flange and a first groove portion visible from outside the moving shaft; the force limiting steel wire sequentially penetrates through the first through hole part and the first groove part.
Optionally, the moving shaft includes the first receiving groove and an annular flange at one end of the first receiving groove; the second accommodating groove comprises a second through hole part and a third through hole part, and the second through hole part is positioned in the annular flange; the outer side wall of the moving shaft is provided with N flaring ports which are narrow at the bottom and wide at the top and are arranged side by side along the axial direction, and the side wall of each flaring port is provided with a through hole as the third through hole part; the force limiting steel wire sequentially penetrates through the second through hole part and the third through hole part.
Optionally, the diameter of the groove on the dead axle is larger than the diameter of the force limiting steel wire.
In order to solve the technical problem, the invention further provides a safety belt device which comprises the pre-tightening type two-stage force limiting retractor.
Advantageous effects
The invention provides a pre-tightening type secondary force-limiting retractor and a safety belt device, wherein the pre-tightening type secondary force-limiting retractor comprises: the force limiting device comprises a force limiting steel wire, a force limiting rod, a fixed shaft, a pre-tightening wheel, a ratchet ring and a moving shaft; one end of the force limiting rod is fixed on the fixed shaft, and the other end of the force limiting rod extends into the first accommodating groove in the movable shaft and is limited in the first accommodating groove; the end of one end of the force limiting steel wire is fixed on the fixed shaft, and the other end of the force limiting steel wire sequentially penetrates through the fixed shaft, the ratchet ring and the pre-tightening wheel and then extends into a second accommodating groove in the movable shaft; when the movable shaft rotates, the force limiting rod is driven to synchronously rotate, the force limiting steel wire is driven to be pulled out of the second accommodating groove and wound on the fixed shaft, and the groove in the fixed shaft provides an accommodating space for the wound force limiting steel wire; through the scheme, the pre-tightening function can be realized, the force limiting rod and the force limiting steel wire are matched to realize the secondary force limiting function, the pre-tightening function enables a passenger to be tightly attached to the seat in case of emergency braking, frontal collision or rolling of the automobile, and the secondary force limiting function reduces the injury degree of the chest of the passenger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an exploded view of a pretensioned two-stage limited force retractor according to an embodiment of the present invention;
fig. 2 is a schematic view of a pretensioned two-stage force limiting retractor according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating a pretensioned two-stage force limiting retractor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a force-limiting steel wire in a straightened state according to a first embodiment of the present invention;
FIG. 5 is a schematic view of a force-limiting steel wire in a wound state according to a first embodiment of the present invention;
FIG. 6 is a schematic view of a pretensioning wheel and a ratchet ring gear according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a first hole and chamfer reaming configuration in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of a force limiting steel wire passing through a first hole according to an embodiment of the present invention;
fig. 9 is a schematic view of a moving shaft according to an embodiment of the present invention;
fig. 10 is a schematic view of a force-limiting steel wire passing through a moving shaft according to an embodiment of the present invention;
FIG. 11 is a graph illustrating a force limit value versus time according to an embodiment of the present invention;
fig. 12 is a schematic view of a seatbelt apparatus according to a second embodiment of the present invention;
the force limiting device comprises a force limiting steel wire 10, a force limiting rod 11, a fixed shaft 12, a pre-tightening wheel 13, a ratchet ring gear 14, a movable shaft 15, a first accommodating groove 21, a second accommodating groove 22, a groove 23, a first hole 24, a chamfered hole expanding structure 25, a chamfered structure 26, a coil spring assembly 30, a bracket 31, a lower positioning 32, an elbow pipe assembly 33, a belt sensing assembly 34, a vehicle sensing assembly 35, a cover assembly 36, a lock cover 37 and a pre-tightening type two-stage force limiting retractor 38.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
This embodiment will provide a pretensioned two-stage force limiting retractor, which, referring to fig. 1 to 11, includes:
the force limiting device comprises a force limiting steel wire 10, a force limiting rod 11, a fixed shaft 12, a pre-tightening wheel 13, a ratchet ring gear 14 and a movable shaft 15;
one end of the force limiting rod 11 is fixed on the fixed shaft 12, and the other end of the force limiting rod extends into the first accommodating groove 21 in the movable shaft 15 and is limited in the first accommodating groove 21;
the end of one end of the force limiting steel wire 10 is fixed on the fixed shaft 12, and the other end of the force limiting steel wire sequentially penetrates through the fixed shaft 12, the ratchet ring 14 and the pre-tightening wheel 13 and then extends into the second accommodating groove 22 in the movable shaft 15;
the pre-tightening wheel 13 is matched with the ratchet ring gear 14 to realize the pre-tightening function;
when the moving shaft 15 rotates, the force limiting rod 11 is driven to synchronously rotate, the force limiting steel wire 10 is driven to be pulled out of the second accommodating groove 22 and wound on the fixed shaft 12, and the groove 23 in the fixed shaft 12 provides an accommodating space for the wound force limiting steel wire 10;
through the scheme, the pre-tightening function can be realized, the force limiting rod 11 and the force limiting steel wire 10 are matched to realize the secondary force limiting function, in case of emergency braking, frontal collision or rolling of the automobile, the pre-tightening function enables a passenger to be tightly attached to the seat, and the secondary force limiting function reduces the injury degree of the chest of the passenger.
Optionally, the pretension wheel 13 and the ratchet ring 14 are integrally formed.
Alternatively, the length of the force limiting steel wire 10 is equal to or greater than half a turn and equal to or less than one turn of the winding fixed shaft 12 after being pulled out of the second accommodating groove 22.
Alternatively, the force limit lever 11 rotates 2 times.
Referring to fig. 11, first, the force limiting steel wire 10 is in a straightened state; in the early stage of force limitation, the force limiting steel wire 10 and the force limiting rod 11 act together to output a high force value; in the later stage of force limitation, only the force limiting rod 11 acts to output a low force value.
The front end of the force limiting steel wire 10 has high limiting force, and the rear end does not participate in the force limiting steel wire because the force limiting steel wire only rotates within one circle. The force limiting rod 11 is used for limiting force in the whole stage, and the force limiting rod 11 rotates for 2 circles.
Force limiting in the early stage: after the pawl locks the fixed shaft 12, one end of the force limiting steel wire 10 and one end of the force limiting rod 11 are fixed along with the fixed shaft 12 and the pre-tightening wheel 13, while the other end of the force limiting rod 11 rotates along with the fixed shaft 15, meanwhile, the force limiting steel wire 10 is pulled out of a round hole of the driven shaft 15 and is wound on the fixed shaft 12, and the groove 23 on the driven shaft 15 provides a storage space for the force limiting steel wire 10 after being wound and bent. At this time, the torsion of the force limiting rod 11 forms a higher force value part at the front end of a secondary force limiting curve together with the bending and winding of the force limiting steel wire 10.
Force limiting later stage: when the length-adjustable force limiting steel wire 10 (generally not more than 1 circle) is pulled out of the driven shaft 15, the front end of the secondary force limiting curve is ended. The subsequent force limiting function is that only the force limiting rod 11 continues to rotate, and a rear-end low-force value part of a secondary force limiting curve is formed.
Only one steel wire is added, the secondary force limiting function can be achieved, the part specification is reduced, and the management cost is saved. And the steel wire is simple to assemble and can be installed into a coiler at last.
Optionally, a first hole 24 is drilled at the maximum material thickness of the ball-concave edge of the pretensioning wheel 13, the first hole 24 is visible from the middle ball-concave part of the pretensioning wheel 13, and the force limiting steel wire 10 passes through the first hole 24. I.e. the force-limiting steel wire 10 passes through the maximum material thickness of the ball-concave edge of the pre-tightening wheel 13.
Optionally, a chamfer reaming structure 25 is provided where the first bore 24 exits the force limiting wire 10. Providing yielding space for the bending deformation of the force limiting steel wire 10.
Optionally, a chamfer structure 26 is provided at the notch of the second receiving groove 22. Providing space for the bending deformation of the force limiting steel wire 10, and determining the bending force according to the bending angle. The force limiting steel wire 10 is bent along the chamfer and is matched with the torsion of the force limiting rod 11, so that the early-stage high force value of the secondary force limiting is realized.
Alternatively, in one embodiment, the moving shaft 15 includes a first receiving groove 21 and an annular flange at one end of the first receiving groove 21; the second housing groove 22 comprises a first through hole portion located within the annular flange and a first groove 23 portion visible externally of the driven shaft 15; the force limiting steel wire 10 passes through the first through hole part and the first groove 23 part in sequence. In order to ensure the service life of the mold, the first groove 23 on the moving shaft 15 is penetrated through the outside.
Alternatively, in another embodiment, the moving shaft 15 includes a first receiving groove 21 and an annular flange at one end of the first receiving groove 21; the second receiving groove 22 includes a second through hole portion and a third through hole portion, the second through hole portion being located in the annular flange; the outer side wall of the moving shaft 15 is provided with N flaring ports which are arranged side by side along the axial direction and are narrow at the bottom and wide at the top, and the side wall of each flaring port is provided with a through hole as a third through hole part; the force limiting steel wire 10 sequentially passes through the second through hole part and the third through hole part. Alternatively, N is 3 or 4, etc.
Optionally, the diameter of the groove 23 on the dead axle 12 is larger than the diameter of the force limiting steel wire 10.
Alternatively, the ends of the force limiting wire 10 may be rounded, flat, etc.
The pretensioned secondary force limiting retractor 38 of the present embodiment also has functions of locking, receiving pretension to drive webbing to rewind, and the like.
Example two
Referring to fig. 12, the present embodiment also provides a seatbelt apparatus including the pretensioned secondary limit retractor 38 of any of the above.
The seatbelt apparatus of the present embodiment further includes a coil spring assembly 30, a bracket 31, a lower positioning 32, a bent pipe assembly 33, a belt sensing assembly 34, a vehicle sensing assembly 35, a cover assembly 36, a lock cover 37;
the coil spring assembly 30 is used to wind up webbing into the retractor;
the bracket 31 is used for a support main body of the entire retractor;
the lower location 32 is used to provide a location for the elbow;
the bent pipe assembly 33 is used for pushing the marble through high-pressure gas generated by gunpowder to realize a pre-tightening function;
the belt sensing assembly 34 is used for a webbing pull-out acceleration lock triggering mechanism;
the vehicle sensing component 35 is used for locking the trigger mechanism by the inclination angle and the acceleration of the vehicle body;
the cover assembly 36 is used for forming a support body together with the bracket 31 and collecting the preloaded marble;
the lock cover 37 is used for supporting and positioning.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (10)
1. A pretensioned two level force limiting retractor, comprising:
the force limiting device comprises a force limiting steel wire, a force limiting rod, a fixed shaft, a pre-tightening wheel, a ratchet ring and a moving shaft;
one end of the force limiting rod is fixed on the fixed shaft, and the other end of the force limiting rod extends into the first accommodating groove in the movable shaft and is limited in the first accommodating groove;
the end of one end of the force limiting steel wire is fixed on the fixed shaft, and the other end of the force limiting steel wire sequentially penetrates through the fixed shaft, the ratchet ring and the pre-tightening wheel and then extends into a second accommodating groove in the movable shaft;
when the moving shaft rotates, the force limiting rod is driven to rotate synchronously, the force limiting steel wire is driven to be pulled out of the second accommodating groove and wound on the fixed shaft, and the groove in the fixed shaft provides an accommodating space for the wound force limiting steel wire.
2. The pretensioned two stage force limiting retractor of claim 1 wherein the pretensioned wheel has a ball recess edge with a maximum material thickness where a first hole is drilled, the first hole being visible from the center ball recess of the pretensioned wheel, the force limiting wire passing through the first hole.
3. The pre-tensioned two-stage force-limiting retractor according to claim 2 wherein a chamfered hole-enlarging structure is provided at a position where the first hole penetrates out of the force-limiting steel wire.
4. The pretensioned secondary force limiting retractor according to claim 1 wherein a chamfered structure is provided at the notch of the second receiving groove.
5. The pretensioned secondary force limiting retractor according to any of claims 1 to 4 wherein the length of the force limiting wire is equal to or greater than half a turn and equal to or less than one turn around the dead axle after being pulled out of the second receiving groove.
6. The pretensioned two stage force limiter retractor according to any of claims 1 to 4 wherein the force limit lever rotates 2 revolutions.
7. The pretensioned two stage force limiting retractor according to any of claims 1 to 4 wherein the moving shaft includes the first receiving groove and an annular flange at one end of the first receiving groove; the second receiving groove includes a first through hole portion located in the annular flange and a first groove portion visible from outside the moving shaft; the force limiting steel wire sequentially penetrates through the first through hole part and the first groove part.
8. The pretensioned two stage force limiting retractor according to any of claims 1 to 4 wherein the moving shaft includes the first receiving groove and an annular flange at one end of the first receiving groove; the second accommodating groove comprises a second through hole part and a third through hole part, and the second through hole part is positioned in the annular flange; the outer side wall of the moving shaft is provided with N flaring ports which are narrow at the bottom and wide at the top and are arranged side by side along the axial direction, and the side wall of each flaring port is provided with a through hole as the third through hole part; the force limiting steel wire sequentially penetrates through the second through hole part and the third through hole part.
9. The pretensioned secondary force limiter retractor according to any of claims 1 to 4 wherein the diameter of the groove on the dead axle is larger than the diameter of the force limiting wire.
10. A seatbelt apparatus, comprising a pretensioned secondary limit force retractor according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048917.4A CN111114487A (en) | 2020-01-16 | 2020-01-16 | Pre-tightening type secondary force limiting retractor and safety belt device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048917.4A CN111114487A (en) | 2020-01-16 | 2020-01-16 | Pre-tightening type secondary force limiting retractor and safety belt device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111114487A true CN111114487A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010048917.4A Pending CN111114487A (en) | 2020-01-16 | 2020-01-16 | Pre-tightening type secondary force limiting retractor and safety belt device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111114487A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183914A (en) * | 2021-04-06 | 2021-07-30 | 重庆光大产业有限公司 | Reliable coiler is steady and just terminates to limit for force |
| CN113895393A (en) * | 2021-11-18 | 2022-01-07 | 重庆光大产业有限公司 | Pawl type pretension termination retractor |
-
2020
- 2020-01-16 CN CN202010048917.4A patent/CN111114487A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183914A (en) * | 2021-04-06 | 2021-07-30 | 重庆光大产业有限公司 | Reliable coiler is steady and just terminates to limit for force |
| CN113183914B (en) * | 2021-04-06 | 2022-04-01 | 重庆光大产业有限公司 | Reliable coiler is steady and just terminates to limit for force |
| CN113895393A (en) * | 2021-11-18 | 2022-01-07 | 重庆光大产业有限公司 | Pawl type pretension termination retractor |
| CN113895393B (en) * | 2021-11-18 | 2022-07-19 | 重庆光大产业有限公司 | Pawl type pretension termination retractor |
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