CN203727335U - Safety belt retractor - Google Patents
Safety belt retractor Download PDFInfo
- Publication number
- CN203727335U CN203727335U CN201320883141.3U CN201320883141U CN203727335U CN 203727335 U CN203727335 U CN 203727335U CN 201320883141 U CN201320883141 U CN 201320883141U CN 203727335 U CN203727335 U CN 203727335U
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- CN
- China
- Prior art keywords
- mandrel
- limit rod
- force
- plate
- projection
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a safety belt retractor. The safety belt retractor comprises a frame, a locking plate, a mandrel and a limit rod. The frame is provided with a first parallel plate, a second parallel plate and a perpendicular plate, the first parallel plate is provided with a gear hole, the second parallel plate is provided with a round hole, the locking plate is provided with a pawl, the mandrel is provided with a hollow portion, the limit rod is arranged in the hollow portion, one end of the limit rod is circumferentially fixed with the locking plate, the other end of the limit rod is circumferentially fixed with the mandrel, and the locking plate is provided with a projection. The projection extends into the hollow portion of one end of the mandrel, and at least one or more than one ribs are arranged on the circumference of the projection and are in interference fit with the mandrel. On one hand, the mandrel and the lock plate are firmly fixed at ordinary times, practicality is unaffected; on the other hand, in case of collision of vehicles, the rib connection is extruded by rotation force under the low load and cannot affect energy absorbing load of the limit rod, and energy absorbing is stable and reliable.
Description
Technical field
The utility model relates to a kind of Webbing retractor, relates in particular to the more reliable and more stable Webbing retractor of a kind of energy-absorbing.
Background technology
Mandrel of automobile safety belt and lock plate connection mode have polytype, as peg type, and outer-enwraped type etc.
The effect of car belt is exactly in case of emergency driver and crew to be fixed on seat; but in nearest seat belt apparatus, possesses pre-tightening device; its object is; under the vehicle emergency causing in collision etc.; by eliminating the lax of ribbon; before driver and crew move forward, constrained on seat, improved the protective value to driver and crew.The action of pre-tightening device is used gunpowder conventionally, by the application force of the gas that produces when the gunpowder explosion, ribbon is regained rapidly.But the strength of gunpowder is not so good control, so generally all will add an energy absorption device alleviates the chest burden that driver and crew cause due to inertia.
What energy absorption device generally used is force-limit rod, is commonly called as torsion bar.One end of force-limit rod is set on mandrel, and the other end is set on the lock plate of lock in emergency mechanism, and lock plate and mandrel match.In the time usually using, can firmly be fixed together, on the one hand, practicality can not be affected, on the other hand, and in the time of vehicle collision etc. in situation, because the lock plate being combined together and mandrel can relatively rotate under low load condition, so reach the object of energy-absorbing.
All the time, pin connects and is considered to a kind of reliable connection mode, even if it is upper that the load of pin is added to the energy absorbing load of force-limit rod, because the breaking load of pin is also less than force-limit rod energy absorbing load, therefore there will not be some special problems.But in recent years, owing to need to improving the performance of the shock absorbing capability of vehicle body and the constraint technology to chaufeur, force-limit rod energy absorbing load declines, the breaking load that starts to produce pin is than also large situation of force-limit rod energy absorbing load, can impact force-limit rod energy absorbing load, cause energy-absorbing unstable.
Utility model content
The purpose of this utility model is to overcome the defect that prior art exists, provide a kind of in the time of every day use firmly fixed central spindle and lock plate, can not bring to practicality the Webbing retractor of adverse effect, on the other hand, in the situations such as vehicle collision, the rib of its use is connected to and under underload, is subject to the effect of rotational force and is extruded, but can force-limit rod energy absorbing load not impacted, and energy-absorbing is reliable and stable.
The utility model solves the technical scheme that its technical matters adopts: a kind of Webbing retractor, comprise framework, lock plate, mandrel and force-limit rod, described framework has the first parallel plate, the second parallel plate and be connected to the diaphragm plate between described the first parallel plate and the second parallel plate, on described the first parallel plate, be provided with gear hole, on described the second parallel plate, be provided with circular hole, described lock plate is provided with for engaging the ratchet with lock in emergency safety strap with described gear hole, described mandrel has hollow bulb, described force-limit rod is arranged in described hollow bulb, one end of described force-limit rod and lock plate are circumferentially fixing, its other end and mandrel are circumferentially fixing, on described lock plate, be provided with projection, this projection stretches in the hollow bulb of mandrel one end, on the side face of described projection, be provided with at least one or one or more rib, this rib extends axially along mandrel, rib on described projection and mandrel interference fit.
Described force-limit rod two ends are provided with spline, on described lock plate, be provided with hole along its axis, the one end for being connected with force-limit rod in this hole is provided with the keyway matching with the spline on force-limit rod, and the keyway on spline and the lock plate of described force-limit rod one end is connected.
One end away from lock plate of described mandrel hollow bulb is provided with the keyway matching with the spline on force-limit rod, and the keyway of the spline of the described force-limit rod other end and mandrel hollow bulb is connected.
Described at least one or one or more rib annular be distributed on projection side face.
The beneficial effects of the utility model: in the time being in an emergency, ratchet can be engaged on framework by Locking Device, lock plate and mandrel just stop operating simultaneously, and driver and crew are fixed on seat.Because inertia and the pre-tightening device of human body can produce a huge power, in the time that power value exceedes certain limit, mandrel can overcome the fixing of lock plate rib, relatively rotates, and finally reaches the object of energy-absorbing.Replace pin with rib, energy-absorbing is more reliable and more stable, and more simple and convenient than peg type in actual assembled process, and right alignment is high, has promotional value.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the decomposition texture schematic diagram of preferred embodiment of the present utility model;
Fig. 2 is front view of the present utility model;
In Fig. 3 Fig. 2, cut open cutaway view;
Fig. 4 is the connection structure schematic diagram of lock plate of the present utility model, mandrel and force-limit rod;
Fig. 5 is the structure for amplifying schematic diagram of A in Fig. 4;
Fig. 6 is pin limiter diagram of curves;
Fig. 7 is rib limiter diagram of curves of the present utility model.
Detailed description of the invention
As shown in Fig. 1～5, a kind of Webbing retractor, comprises framework 1, lock plate 2, mandrel 3 and force-limit rod 4.Described framework 1 has the first parallel plate 11, the second parallel plate 12 and is connected to the diaphragm plate 13 between described the first parallel plate 11 and the second parallel plate 12, on described the first parallel plate 11, is provided with gear hole 14, on described the second parallel plate 12, is provided with circular hole 15.Described lock plate 2 is provided with for engaging the ratchet 5 with lock in emergency safety strap with described gear hole 14.Described mandrel 3 has hollow bulb 31, described force-limit rod 4 is arranged in described hollow bulb 31, one end of described force-limit rod 4 and lock plate 2 are circumferentially fixing, its other end and mandrel 3 are circumferentially fixing, preferred embodiment: described force-limit rod 4 two ends are provided with spline 41, on described lock plate 2, be provided with hole along its axis, the one end for being connected with force-limit rod 4 in this hole is provided with the keyway matching with the spline 41 on force-limit rod 4, and the spline 41 of described force-limit rod 4 one end is connected with the keyway on lock plate 2; One end away from lock plate 2 of described mandrel hollow bulb 31 is provided with the keyway matching with the spline 41 on force-limit rod 4, and the spline 41 of described force-limit rod 4 other ends is connected with the keyway of mandrel hollow bulb 31.Described mandrel 3 away from one end frame of lock plate 2 in the circular hole 15 of the second parallel plate 12.
On described lock plate 2, be provided with projection 21, this projection 21 is cylindrical, this projection 21 stretches in the hollow bulb 31 of mandrel 3 one end, on the side face of described projection 21, annular is evenly equipped with at least one or one or more rib 22, this rib 22 extends axially along mandrel 3, rib 22 and mandrel 3 interference fit on described projection 21.The thickness of described rib 22, length, shape be according to the difference of required power value and difference, preferred embodiment: the thickness of described rib 22 is 0.2～0.4mm, and its length is 3～6mm.Gap between the inwall of the side face of described projection 21 and mandrel hollow bulb 31 is different and different according to described rib quantity, length, thickness, shape etc., and preferred gap is 0.1～0.3mm.In addition, described rib 22 is preferably set to 1～6.When described rib 22 is subject to the torsion of 1000-3000N between lock plate 2 and mandrel 3, rib 22 squeezed by the inwall of mandrel hollow bulb 31 and overcome friction and rotate.
Principle of work of the present utility model: in the time being in an emergency, ratchet 5 can be engaged on framework 1 by Locking Device, and lock plate 2 and mandrel 3 just stop operating simultaneously, and driver and crew are fixed on seat.Because inertia and the pre-tightening device of human body can produce a huge power, in the time that power value exceedes certain limit, mandrel 3 can overcome the fixing of lock plate rib 22, relatively rotates, and finally reaches the object of energy-absorbing
The utility model is compared the fixing advantage of general pin and can intuitively be found out from Fig. 6,7, and the utility model energy-absorbing is fixing more reliable and more stable than pin.
Should be appreciated that specific embodiment described above is only for explaining the utility model, and be not used in restriction the utility model.The apparent variation of being extended out by spirit of the present utility model or variation are still among protection domain of the present utility model.
Claims (4)
1. a Webbing retractor, comprise framework (1), lock plate (2), mandrel (3) and force-limit rod (4), described framework (1) has the first parallel plate (11), the second parallel plate (12) and be connected to described the first parallel plate (11) and the second parallel plate (12) between diaphragm plate (13), on described the first parallel plate (11), be provided with gear hole (14), on described the second parallel plate (12), be provided with circular hole (15), described lock plate (2) is provided with for engage the ratchet (5) with lock in emergency safety strap with described gear hole (14), described mandrel (3) has hollow bulb (31), described force-limit rod (4) is arranged in described hollow bulb (31), one end of described force-limit rod (4) and lock plate (2) are circumferentially fixing, its other end and mandrel (3) are circumferentially fixing, it is characterized in that: on described lock plate (2), be provided with projection (21), this projection (21) stretches in the hollow bulb (31) of mandrel (3) one end, on the side face of described projection (21), be provided with at least one or one or more rib (22), this rib (22) extends axially along mandrel (3), rib (22) on described projection (21) and mandrel (3) interference fit.
2. a kind of Webbing retractor according to claim 1, it is characterized in that: described force-limit rod (4) two ends are provided with spline (41), described lock plate (2) is upper is provided with hole along its axis, the one end for being connected with force-limit rod (4) in this hole is provided with the keyway matching with the spline (41) on force-limit rod (4), and the spline (41) of described force-limit rod (4) one end is connected with the keyway on lock plate (2).
3. a kind of Webbing retractor according to claim 2, it is characterized in that: one end away from lock plate (2) of described mandrel hollow bulb (31) is provided with the keyway matching with the spline (41) on force-limit rod (4), the spline (41) of described force-limit rod (4) other end is connected with the keyway of mandrel hollow bulb (31).
4. a kind of Webbing retractor according to claim 1, is characterized in that: described at least one or one or more rib (22) annular be distributed on projection (21) side face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883141.3U CN203727335U (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883141.3U CN203727335U (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203727335U true CN203727335U (en) | 2014-07-23 |
Family
ID=51197430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320883141.3U Expired - Fee Related CN203727335U (en) | 2013-12-30 | 2013-12-30 | Safety belt retractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203727335U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742856A (en) * | 2013-12-30 | 2015-07-01 | 常州博万达汽车安全设备有限公司 | Safety belt winder |
-
2013
- 2013-12-30 CN CN201320883141.3U patent/CN203727335U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742856A (en) * | 2013-12-30 | 2015-07-01 | 常州博万达汽车安全设备有限公司 | Safety belt winder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20191230 |