CN112977326A - Limit force termination type retractor capable of effectively reducing collision injury of vehicle passengers - Google Patents
Limit force termination type retractor capable of effectively reducing collision injury of vehicle passengers Download PDFInfo
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- CN112977326A CN112977326A CN202110365716.1A CN202110365716A CN112977326A CN 112977326 A CN112977326 A CN 112977326A CN 202110365716 A CN202110365716 A CN 202110365716A CN 112977326 A CN112977326 A CN 112977326A
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- Prior art keywords
- limiting
- force
- termination
- stopping
- pawl
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The invention relates to a force-limited termination type retractor for effectively reducing collision injury of vehicle passengers, which comprises a movable shaft, a fixed shaft and a bracket, wherein the fixed shaft is fixedly connected with the movable shaft; one end of the movable shaft is connected with the fixed shaft; the retractor is also provided with a force limiting stopping mechanism; the shifting fork props against the limiting rod in the initial state of the force limiting stopping mechanism, and the limiting rod blocks the stopping pawl; and the force limiting stopping mechanism drives the shifting fork to move along the fixed shaft in a stopping state, the limiting rod moves towards the direction of the fixed shaft, the stopping pawl is separated from limiting, and the stopping pawl stretches out and is locked with the bracket. Its advantages are: by arranging the force limiting termination mechanism, the force limiting termination function is centralized on the mandrel component, the displacement of passengers is effectively controlled, the safety performance is improved, and the injury of the passengers in the vehicle during collision is reduced; simultaneously compare with the actual limit of force termination of lock nut and dead axle locking of traditional structure, part material cost is lower, and the processing technology degree of difficulty reduces by a wide margin, and manufacturability is stronger.
Description
Technical Field
The invention relates to the technical field, in particular to a force-limited termination type retractor which can effectively reduce the collision injury of vehicle passengers.
Background
Seat belts are indispensable occupant restraint system accessories. The safety regulations for automobile collision in China stipulate that all automobiles must be assembled with safety belts. Related experimental studies have also shown that the use of seat belts is the most effective way to mitigate or avoid injuries in occupant restraint systems. The automobile safety belt has a simple structure, and the main component is a retractor for automatically recovering the safety belt. However, the seat belt retractor of the prior art has the following drawbacks and disadvantages:
firstly, at the moment of collision of the automobile, if the safety belt adopts a common retractor, the safety belt will be subjected to great collision impact, and if the safety belt force value is not limited, the possibility of injury to the human body is high.
Secondly, as the requirements for safety performance are continuously increased, in order to reduce the injury of the vehicle passengers during collision (a laboratory obtains the injury value of a dummy by simulating the collision by using the dummy), the form of the force limiting function is in diversified demands in various automobile manufacturers. However, the retractor seatbelt of the related art cannot effectively control the amount of displacement of the occupant.
Further, chinese patent document CN201910197763.2, application date 20190315, discloses a self-locking seat belt retractor for a seat belt apparatus of an automobile, in which a force-limiting termination function is realized by a locking nut and a dead axle locking manner. But has the problems of high material cost of parts, high processing difficulty and the like.
In view of the above, there is a need for a retractor that can effectively control the displacement of an occupant to reduce the injury of the occupant during a collision, and that is low in cost and more manufacturable. No report is currently made about such a retractor.
Disclosure of Invention
The invention aims to provide a retractor which effectively controls the displacement of an occupant to reduce the injury of the passenger caused by collision, and has low cost and stronger manufacturability.
In order to achieve the purpose, the invention adopts the technical scheme that:
a force-limited stopping type retractor for effectively reducing collision injury of a vehicle passenger comprises a movable shaft, a fixed shaft and a bracket; one end of the movable shaft is connected with the fixed shaft; the peripheries of the moving shaft and the fixed shaft are radially supported on the bracket; the retractor is also provided with a force limiting stopping mechanism;
the force limiting termination mechanism comprises a termination pawl, a limiting rod, a spring and a shifting fork; the spring is sleeved on the limiting rod; one end of the limiting rod is connected with the stopping pawl, and the other end of the limiting rod is connected with the shifting fork;
the shifting fork props against the limiting rod in the initial state of the force limiting stopping mechanism, and the limiting rod blocks the stopping pawl;
and the force limiting stopping mechanism drives the shifting fork to move along the fixed shaft in a stopping state, the limiting rod moves towards the direction of the fixed shaft, the stopping pawl is separated from limiting, and the stopping pawl stretches out and is locked with the bracket.
As a preferred technical scheme, through holes are formed in two ends of the moving shaft, and open grooves for placing limiting rods are formed in the same positions in the middle of the moving shaft.
As a preferred technical scheme, the edge of the moving shaft is provided with a relief bulge.
As a preferable technical scheme, the fixed shaft is provided with a driving bulge.
As a preferable technical solution, a spring placing hole is provided in the middle of the stopping pawl; the edge of the termination pawl is provided with a lapping groove.
As a preferable technical solution, the spring placing hole is provided with a return spring.
As a preferable technical scheme, the connection form between the limiting rod and the stopping pawl adopts a lap joint form.
As a preferable technical scheme, the limiting rod is further provided with a limiting bulge for limiting the spring.
The invention has the advantages that:
1. according to the force-limiting termination type retractor for effectively reducing the collision injury of the vehicle passenger, the force-limiting termination mechanism is arranged, so that the force-limiting termination function is concentrated on the mandrel component, the displacement of the passenger is effectively controlled, the safety performance is improved, and the injury of the vehicle passenger in the collision process is reduced; adopt the structure form of gag lever post, termination ratchet and shifting fork simultaneously, compare with the actual limit force termination of lock nut and dead axle locking of traditional structure, part material cost is lower, and the processing technology degree of difficulty reduces by a wide margin, and manufacturability is stronger.
2. The fixed shaft is provided with a driving bulge, the shifting fork is driven to move to the way after the force limiting stroke meets the requirement through the design of the driving bulge, the limiting rod is driven by the spring to move towards the direction of the fixed shaft, the stopping pawl is released, and the pawl is locked with the support.
Drawings
Fig. 1 is a front view schematic diagram of a force-limited final retractor of the present invention effective to reduce vehicle occupant crash injuries.
Fig. 2 is a left side view of the retractor of the present invention.
Figure 3 is a schematic illustration of the exploded construction of the retractor of the present invention.
Fig. 4 is a schematic structural view of the force limiting termination mechanism.
Fig. 5 is a schematic structural view of the moving shaft.
FIG. 6 is a schematic view of the structure of the fixed shaft.
Fig. 7 is a schematic view of the structure of the stop pawl.
FIG. 8 is a schematic view of an initial state profile of the force limiting termination mechanism.
Fig. 9 is a distribution diagram of a force limit end state of the force limit end mechanism.
Detailed Description
The invention is further described with reference to the following examples and with reference to the accompanying drawings.
The reference numerals and components referred to in the drawings are as follows:
1. moving axis 2. fixed axis
3. Support 4 force limiting stop mechanism
41. Stop pawl 42, limit rod
43. Spring 44 shift fork
45. Through hole 46, open slot
47. Abdication bump 48, drive bump
49. Return spring 411, spring receiving hole
412. Overlapping groove
Referring to fig. 1 to 3, fig. 1 is a front view schematically illustrating a force-limited final retractor for effectively reducing collision injury of a vehicle occupant according to the present invention. Fig. 2 is a left-side view showing the retractor according to the present invention. Fig. 3 is a schematic view of an exploded structure of the retractor of the present invention. A force-limited termination retractor for effectively reducing impact injury to vehicle occupants; the retractor comprises a movable shaft 1, a fixed shaft 2 and a bracket 3; one end of the movable shaft 1 is connected with the fixed shaft 2; the peripheries of the movable shaft 1 and the fixed shaft 2 are radially supported on the bracket 3; the retractor is also provided with a force limiting termination mechanism 4.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the force limiting stop mechanism 4. The force limiting stopping mechanism 4 comprises a stopping pawl 41, a limiting rod 42, a spring 43 and a shifting fork 44; the spring 43 is sleeved on the limiting rod 42; one end of the limiting rod 42 is connected with the stopping pawl 41, and the other end is connected with the shifting fork 44.
Referring to fig. 5, fig. 5 is a schematic structural view of the moving shaft 1. Through holes 45 are arranged at two ends of the moving shaft 1, and a slot 46 for placing the limiting rod 42 is arranged at the same position in the middle; the edge of the moving shaft 1 is provided with a relief bulge 47.
Referring to fig. 6, fig. 6 is a schematic structural view of the fixed shaft 2. The fixed shaft 2 is provided with a driving bulge 48; the driving protrusion 48 is used for driving the shift fork 44 to start the force limiting function.
Referring to fig. 7, fig. 7 is a schematic structural view of the stopping pawl 41. A spring placing hole 411 is provided in the middle of the end pawl 41; the edge of the stopping pawl 41 is provided with a catching groove 412.
Referring to fig. 8, fig. 8 is a schematic diagram of the distribution of the initial state of the force limiting stop mechanism 4. In the initial state of the force limiting stopping mechanism 4, the shifting fork 44 abuts against the limiting rod 42, and the limiting rod 42 blocks the stopping pawl 41.
Referring to fig. 9, fig. 9 is a distribution diagram of the force limit termination state of the force limit termination mechanism 4. In the termination state of the force limiting termination mechanism 4, the fixed shaft 2 drives the shifting fork 44 to move, the limiting rod 42 moves towards the direction of the fixed shaft 2, the termination pawl 41 is separated from limiting, the termination pawl 41 extends out, and the termination pawl is locked with the bracket 3.
The embodiment needs to be explained as follows:
the coiler still be provided with limit for force and terminate mechanism 4, through limit for force termination mechanism 4, effectively improved the security performance, reduce the injury of vehicle passenger when the collision.
The force limiting stopping mechanism 4 comprises a stopping pawl 41, a limiting rod 42, a spring 43 and a shifting fork 44; the spring 43 is sleeved on the limiting rod 42; one end of the limiting rod 42 is connected with the stopping pawl 41, and the other end is connected with the shifting fork 44. The effect of this design is: the force limiting termination arrangement mode is simple, and the specific force limiting termination arrangement is as follows: a stopper rod 42 is disposed in the middle of the movable shaft 1, and a spring 43 is fitted over the stopper rod 42 to push out the stopper rod 42 toward the fixed shaft 2. One end of the limiting rod 42, which is positioned at the fixed shaft 2 side, is provided with a part (a shifting fork) which always props against the limiting rod 42 before the force limiting is finished. The other end of the stopper rod 42 protrudes beyond the fixed shaft 2, and restricts the ejection of the stopping pawl 41.
The working principle of the force limiting and stopping mechanism 4 is as follows:
initial state: through the fixed shaft 2 side, a 'shifting fork' in the moving shaft 1 end supports a 'limiting rod 42', a section of 'spring 43' is sleeved in the middle of the 'limiting rod 42', the 'limiting rod 42' sleeved with the 'spring 43' passes through a 'mandrel', and the other end of the 'limiting rod 42' extends out of the moving shaft 1 end face to block a 'stopping pawl 41'.
Starting a force limiting function: after the locking pawl locks the fixed shaft 2, the movable shaft 1 continues to rotate, the torsion bar twists, and the force limiting function is started.
And (4) force limiting termination process: when the movable shaft 1 rotates and the force limiting stroke meets the requirement, the fixed shaft 2 drives the shifting fork to shift, the limiting rod 42 is separated from the shifting fork, the limiting rod 42 moves towards the end of the fixed shaft 2 under the action of the spring 43, the other end of the limiting rod 42 is separated from the stopping pawl 41, and the stopping pawl 41 extends out under the action of the return spring 49 to be meshed and locked with the support 3. At the moment, the two ends of the movable shaft 2 and the fixed shaft 2 are simultaneously locked with the bracket 3 through the pawls, and the force limiting function is finished.
Through holes 45 are arranged at two ends of the moving shaft 1, and a slot 46 for placing the limiting rod 42 is arranged at the same position in the middle. The effect of this design is: through the design of the through hole 45 and the open slot 46, the limiting rod 42 can be axially fixed on the moving shaft 1, and the axial falling of the limiting rod 42 is effectively prevented.
The edge of the moving shaft 1 is provided with a relief bulge 47. The effect of this design is: the offset projection 47 is designed to provide an installation space for the initial position of the handle fork 44.
The fixed shaft 2 is provided with a driving bulge 48; the driving protrusion 48 is used for driving the shift fork 44 to start the force limiting function. Wherein the driving protrusion 48 is used for driving the shift fork 44 to start the force limiting and terminating function.
A spring placing hole 411 is provided in the middle of the end pawl 41; the spring receiving hole 411 is provided with a return spring 49. The effect of this design is: the stop pawl 41 is provided with a pushing action to drive the pawl into engagement with the bracket 3.
The edge of the stopping pawl 41 is provided with a catching groove 412. The design of the overlapping groove 412 provides a support function for the limiting rod 42.
The connection form between the limiting rod 42 and the stopping pawl 41 adopts a lap joint form. Wherein, the lapping form is adopted, which is convenient for the separation between the limiting rod 42 and the stopping pawl 41 under the limiting force stopping state.
The limiting rod 42 is further provided with a limiting bulge for limiting the spring 43. Through the limiting protrusion, the spring 43 on the limiting rod 42 is limited, so that the limiting spring 43 can push the limiting rod 42 to move axially.
According to the force-limiting termination type retractor for effectively reducing the collision injury of the vehicle passenger, the force-limiting termination mechanism 4 is arranged, so that the force-limiting termination function is concentrated on the mandrel component, the displacement of the passenger is effectively controlled, the safety performance is improved, and the injury of the vehicle passenger in the collision process is reduced; adopt the structure form of gag lever post 42, termination ratchet and shifting fork 44 simultaneously, compare with the actual limit force of the lock nut of traditional structure and dead axle 2 locking and terminate ", part material cost is lower, and the processing technology degree of difficulty reduces by a wide margin, and manufacturability is stronger.
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 (8)
1. A force-limited stopping type retractor for effectively reducing collision injury of vehicle passengers is characterized in that the retractor comprises a movable shaft, a fixed shaft and a bracket; one end of the movable shaft is connected with the fixed shaft; the peripheries of the moving shaft and the fixed shaft are radially supported on the bracket; the retractor is also provided with a force limiting stopping mechanism;
the force limiting termination mechanism comprises a termination pawl, a limiting rod, a spring and a shifting fork; the spring is sleeved on the limiting rod; one end of the limiting rod is connected with the stopping pawl, and the other end of the limiting rod is connected with the shifting fork;
the shifting fork props against the limiting rod in the initial state of the force limiting stopping mechanism, and the limiting rod blocks the stopping pawl;
and the force limiting stopping mechanism drives the shifting fork to move along the fixed shaft in a stopping state, the limiting rod moves towards the direction of the fixed shaft, the stopping pawl is separated from limiting, and the stopping pawl stretches out and is locked with the bracket.
2. The force-limiting termination type retractor according to claim 1, wherein through holes are formed at two ends of the movable shaft, and a groove for placing the limiting rod is formed in the same position in the middle of the movable shaft.
3. The force-limiting termination retractor according to claim 1 wherein the edge of the movable shaft is provided with a relief projection.
4. The limited force termination retractor according to claim 1 wherein the fixed axle is provided with a drive projection.
5. The limited termination retractor according to claim 1 wherein a spring receiving hole is provided in the middle of the termination pawl; the edge of the termination pawl is provided with a lapping groove.
6. The limited termination retractor according to claim 5 wherein the spring receiving hole is fitted with a return spring.
7. The limited force termination retractor according to claim 1 wherein the connection between the restraint bar and the termination pawl is in the form of a lap joint.
8. The limited force terminated retractor according to claim 1 wherein the limit lever is further provided with a limit protrusion for limiting the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365716.1A CN112977326B (en) | 2021-04-06 | 2021-04-06 | Limit force termination type retractor capable of effectively reducing collision injury of vehicle passengers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365716.1A CN112977326B (en) | 2021-04-06 | 2021-04-06 | Limit force termination type retractor capable of effectively reducing collision injury of vehicle passengers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112977326A true CN112977326A (en) | 2021-06-18 |
| CN112977326B CN112977326B (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110365716.1A Active CN112977326B (en) | 2021-04-06 | 2021-04-06 | Limit force termination type retractor capable of effectively reducing collision injury of vehicle passengers |
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| Country | Link |
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| CN (1) | CN112977326B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003502204A (en) * | 1999-06-16 | 2003-01-21 | オートリブ・デベロプメント・アクツイエボラーグ | Belt winder with switchable force limiter |
| CN1680150A (en) * | 2004-04-09 | 2005-10-12 | 株式会社东海理化电机制作所 | Webbing retractor |
| CN1305716C (en) * | 2002-04-16 | 2007-03-21 | 关键安全体系股份有限公司 | Seat belt retractor |
| CN101161512A (en) * | 2006-10-12 | 2008-04-16 | 株式会社东海理化电机制作所 | Webbing retractor, method of controlling webbing retractor, and vehicle |
| CN202743196U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Winder for safety belt and safety belt assembly |
| CN104494558A (en) * | 2014-12-01 | 2015-04-08 | 延锋百利得（上海）汽车安全系统有限公司 | Seat belt retractor with load limit stopping function |
| CN211642111U (en) * | 2020-01-16 | 2020-10-09 | 重庆光大产业有限公司 | Pre-tightening type secondary force limiting retractor and safety belt device |
| CN211684991U (en) * | 2019-12-27 | 2020-10-16 | 重庆光大产业有限公司 | Force limiting retractor with stable force value |
-
2021
- 2021-04-06 CN CN202110365716.1A patent/CN112977326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003502204A (en) * | 1999-06-16 | 2003-01-21 | オートリブ・デベロプメント・アクツイエボラーグ | Belt winder with switchable force limiter |
| CN1305716C (en) * | 2002-04-16 | 2007-03-21 | 关键安全体系股份有限公司 | Seat belt retractor |
| CN1680150A (en) * | 2004-04-09 | 2005-10-12 | 株式会社东海理化电机制作所 | Webbing retractor |
| CN101161512A (en) * | 2006-10-12 | 2008-04-16 | 株式会社东海理化电机制作所 | Webbing retractor, method of controlling webbing retractor, and vehicle |
| CN202743196U (en) * | 2012-08-27 | 2013-02-20 | 上海和励信息科技有限公司 | Winder for safety belt and safety belt assembly |
| CN104494558A (en) * | 2014-12-01 | 2015-04-08 | 延锋百利得（上海）汽车安全系统有限公司 | Seat belt retractor with load limit stopping function |
| CN211684991U (en) * | 2019-12-27 | 2020-10-16 | 重庆光大产业有限公司 | Force limiting retractor with stable force value |
| CN211642111U (en) * | 2020-01-16 | 2020-10-09 | 重庆光大产业有限公司 | Pre-tightening type secondary force limiting retractor and safety belt device |
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| CN112977326B (en) | 2021-12-28 |
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