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
  • B60R22/343—Belt retractors, e.g. reels with electrically actuated locking means
• • 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
• • 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
  • B60R22/12—Construction of belts or harnesses
• • 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
  • B60R2022/3402—Retractor casings; Mounting thereof

Definitions

• the invention relates to a belt retractor for safety belts of motor vehicles with a plastic housing frame for receiving a belt reel.
• Belt retractors for motor vehicles consist essentially of a belt reel, for receiving the webbing and a housing frame in which this belt reel is mounted. Furthermore, the housing frame is used for fastening the retractor on the vehicle body or on structural parts of a vehicle seat.
• This housing frame is usually designed as ßlechbiegeteil and also serves to accommodate and attach the components of the locking device, the drive spring and other - application-specific - components.
• this housing frame should be designed as an injection-molded component, wherein a fiebefglasver Kocher thermoplastic material is provided as a plastic material.
• This housing frame is designed as a closed rectangular frame having an open receiving space for the drive spring on one side and an open receiving space for the components of the locking device on the opposite side.
• the belt reel is inserted from an open end in this case, the length of the belt reel in the axial direction is less than the distance between the two side walls.
• Storage of the belt reel is carried out by a plugged axle, which may additionally have the function of a torsion bar.
• the invention is based on the object, a generic
• Belt retractor for safety belts of motor vehicles to improve that a simplified installation of the belt reel and their improved storage are possible and / or that a rotationally fixed load transfer of the coil /
• Ratchet wheel on the housing can be made possible.
• the belt retractor according to the invention should be able to meet all current legal requirements in terms of durability, strength and breaking load. This applies in particular to the requirements for static and / or dynamic breaking load with straight webbing withdrawal. The fulfillment of these requirements was one of the reasons why plastics for housing frames of belt retractors in the series development of motor vehicles have not been used. As a result, the housing frame of the belt retractor as an open, U-shaped
• the U-shaped housing frame is formed on the open front side, a reinforcing plate is attached to plastic, the assembly of the belt reel from the open end of the U-shaped housing frame can be done.
• the reinforcing plate applied after assembly of the belt reel increases the strength of such a housing frame to the extent or can additionally increase the strength of such a housing frame to the extent required for the requirements of a belt retractor for motor vehicles.
• the U-shaped housing frame can be expanded in the elastic region, so that a belt spool can be mounted, the width of which is greater than the distance between the two opposite housing legs, for. to allow a non-rotatable load transfer to the housing frame.
• the belt retractor may comprise a housing frame which is formed as an open, U-shaped frame, wherein at its open end side no reinforcing plate, e.g. made of plastic, is arranged.
• the installation of the belt reel is once again significantly simplified if the housing frame on its side opposite the attachment point side of the middle leg has a lower flexural rigidity. In this lower region of the middle leg can then be achieved during assembly, the largest opening width, without leaving the elastic deformation region of the housing frame. From this area of the largest possible expansion then takes place the belt reel.
• a particularly high rigidity of the housing frame is achieved when the
• Reinforcement plate is curved arched. Such a three-dimensional design of the reinforcing plate increases the rigidity compared to a flat training considerably. Due to the bow-shaped configuration to adapt to the position predetermined by the belt reel ss cylindrical geometry may also be achieved so dä 'in addition to the increased rigidity of the overall volume is reduced. The installation of the belt reel is considerably simplified when the middle
• a fixing plate can be integrally formed with the housing.
• Weight, volume, height and cost of the housing frame are advantageously reduced when the middle leg is reduced starting from the attachment point in its thickness.
• Fasteners are integrally formed. These can be as
• Assembly aid in the sense of a prefix serve. Furthermore, these can serve as anti-rotation both during assembly and during operation. Likewise, additional fastening points can thus be formed on the vehicle body or on the installation site, which supplement the singular screw connection and ensure improved load distribution and improve the vibration behavior.
• this housing frame for a belt retractor as a plastic component.
• this housing frame should be designed as an injection-molded component, wherein a plastic material reinforced with fiberglass is provided as thermoplastic material.
• This housing frame is designed as a closed rectangular frame having an open receiving space for the drive spring on one side and an open receiving space for the components of the locking device on the opposite side.
• the belt reel cooperates with a pawl which is rotatably mounted on a bearing journal. This Bearing pin is designed as part of the housing wall.
• the belt retractor according to the invention should be able to meet all current legal requirements in terms of durability, strength and breaking load. This applies in particular to the requirements for the static breaking load with straight webbing withdrawal. The fulfillment of these requirements was one of the reasons why plastics for housing frames of belt retractors in the series development of motor vehicles have not been used.
• a contact surface is formed for the pawl, by which the pivoting of the pawl is limited, a toggle-like reinforcement of the housing frame to be absorbed load can be limited.
• the leverage ratios of belt reel and the locking teeth and the pawl are limited by this contact surface so that an increased hyperextension is prevented, A knee lever-like force increase by the increasing angle of the two active lever arms is avoided.
• this contact surface results in an improved load distribution of the forces introduced via the pawl into the housing frame.
• the load bearing can be improved again. In particular, this load peaks are avoided and the deformation under load is reduced.
• Pawl corresponds, can additionally provide for improved support of this pawl. This support counteracts in an advantageous manner a displacement of the pawl in the radial direction and protects the storage of the pawl from overloading.
• Pawl comes only when exceeding a predetermined load to the plant, a quick pivoting operation of the pawl is enabled.
• the pawl can thereby pivot largely free of additional friction on the support surface before the load.
• the load absorption of the registered via the pawl in the housing frame forces can be significantly improved once again when the pawl is formed wider on its side facing the support surface.
• This side is usually the side facing away from the locking teeth and the side in which the pivot axis is located.
• a wider support surface provides improved load distribution on the support surface.
• a widened pawl in the region of the support surface with otherwise unchanged thickness leads to significantly improved load distribution only to a small increase in mass of the pawl as a whole. The mass increase is also in the range of the pivot axis, so that the inertia is not excessively increased.
• the load transfer to the vehicle body and the loading of the housing frame are significantly improved when the pawl is arranged so that it is located between the axis of the belt reel and the attachment point of the belt retractor.
• a very direct application of force is possible.
• An increased formation of the housing is thereby limited to a relatively small area of the housing frame, so that volume and mass of the housing frame remain small.
• the rigidity of the housing frame and its breaking strength are advantageously improved if a reinforced area is formed on the housing frame, which connects the support surface for the pawl and the attachment portion.
• the introduction of force from the belt reel on the pawl and the housing frame in the vehicle body is thereby improved.
• plastics for the housing frame of the belt retractor are those from the groups of thermosets and thermoplastics, in particular Polypropylene (PP), polyamide (PA), especially PA6 and polyethylene (PE). to
• a belt retractor for a belt retractor
• Seat belts of motor vehicles provided with a plastic housing frame for receiving a belt reel, wherein the housing frame is formed as an open, U-shaped frame, the open end and or clear width of the two side walls is significantly narrower than the associated belt reel and on the front page a
• a belt retractor is provided, wherein the middle leg of the
• Case frame with a mounting opening with or without thread is provided, and the thickness of which decreases from the adjacent upper end of the attachment opening to the lower end by at least 30%.
• the middle leg is at least partially provided with a honeycomb structure and or ribbed.
• a belt retractor is provided, wherein at least in a lateral legs, an opening is provided to allow lateral mounting of the coil, which is carried out without annular belt webs.
• Belt retractor provided, wherein the bobbin is made with or without teeth of fiber reinforced plastic.
• a belt retractor is provided, wherein in the lateral legs circular recesses are formed together from min. 6.5 mm for the storage of the belt reel, of which at least one by a
• Belt retractor provided; wherein at least one of the circular recess is provided with a toothing.
• a belt retractor is provided, wherein depressions and / or projections are formed on the end faces of the lateral legs, which with
• a belt retractor is provided, wherein the middle leg and / or at least one of the lateral legs of the housing frame is provided with projections and / or latching elements for preventing rotation and / or for load absorption and / or for reducing vibrations ,
• a belt retractor is provided, wherein the housing frame made of plastic is also suitable for use for seat-integrated belt systems.
• a belt retractor is provided, wherein the plastic frame is also suitable for use with a known form of belt tensioners.
• a belt retractor is provided, wherein the plastic frame is also suitable for use with a known form of belt roll-up tensioner.
• a belt retractor is provided, wherein the plastic housing frame is also suitable for use with a known form of Endbeschlag- Straffer.
• a belt retractor is provided, wherein the housing frame made of plastic, is formed integrally with a known form of Straffergephaseuse.
• FIG. 3 is a first perspective view of the housing frame
• FIG. 4 shows a second perspective view of the housing frame
• FIG. 5 shows a view of the rear side of the middle housing leg
• FIG. 7 is a perspective view of a second variant of the housing frame
• FIG. 8 is a perspective view of another variant of the housing frame, which does not have to be bent to mount the coil,
• Fig.13 is a plan view of a plastic part integrally inserted
• the belt retractor shown in Figures 1 to 13 has a housing frame 10 which is U-shaped, and designed as a base plate middle leg 11 and two lateral legs 12 and 13.
• a belt spool 14 is rotatably mounted.
• the two outer sides 15 and 16 of the lateral legs 12 and 13 are closed by housing cover 17 and 18.
• the belt reel consists in a manner known per se of a bobbin 19 and two coronary Gurtstegen 20 and 21.
• a torsion bar 22 is arranged, which is rotatably connected on one side with the belt reel.
• the other side of the torsion bar 22 is connected to a ratchet wheel 23 guided laterally on the belt reel.
• a torsion bar 22 can be arranged in the interior of the bobbin 19, which is non-rotatably connected on one side with the belt reel. The other side of the torsion bar 22 is connected to a ratchet wheel 23 guided laterally on the belt reel. Is the coil without torsion bar, it is a known form of coil, without force limit.
• the coils 14 and 14/1 may be on both outer sides with or without annular rings 32, executed, but preferably have on both sides a toothing similar to how it has the ratchet wheel 23. Since higher torques are transmitted to the housing in coils without force limitation, the torque is preferably distributed by the second toothing on the second lateral leg 12, 13, which includes a suitable counter-toothing to the coil. In a force limiter version, the torque is absorbed only on one side.
• the storage of the belt reel in normal operation takes place on one end face via a spring-loaded bearing pin 24, which is in a bearing receptacle of the housing cover.
• To carry out the bearing pins 24 and 25 have the two lateral legs 12 and 13 each have an opening 26 and 27, whose
• Diameter smaller than the diameter of the webbing webs 20 and 21 is.
• a circumferential housing edge 28 is formed on the outside of the lateral leg 12. This forms together with the wall 29 of the lateral leg 12 a receiving space for a drive spring, not shown, which is connected via the bearing pin 24 with the belt reel.
• the receiving space formed by the housing edge 28 and the wall 29 of the lateral leg for the drive spring is closed by the cover 17, which is also made of plastic for weight reasons.
• On the inside of the lateral leg 12 is a circular recess
• This recess 30 serves to receive a flange-like annular collar 32 on the outside of the belt reel 14.
• the opposite inner side of the second lateral leg 13 also has a circular recess 33 with a peripheral side edge 34, optionally with or without teeth on. This recess serves to receive a flange-shaped annular edge 35 of the ratchet wheel.
• the protruding into the recess 33 pawl 37 cooperates with appropriate control with an external toothing 39 of the ratchet wheel 23 together.
• the belt reel is then shifted by the lever effects occurring in the teeth 38 of the housing wall.
• the belt reel is then moved under jerky load directly or by the occurring lever effects that were triggered by the blocking process in the toothing 38 of the housing wall.
• the opposite recess 30 can also be provided with a toothing, preferably when it is dispensed with a torsion bar.
• the edge of the belt reel is also provided with a corresponding counter-toothing.
• On the outside of the lateral leg 13 is in the range of
• Breakthrough 36 a receiving space 40 is formed, which serves to receive the pawl 37.
• the wall of the receiving space 40 is formed so that it forms a support surface 41 for the pawl 37.
• the lateral leg 13 additionally has a further receiving space 42, which serves to accommodate the mechanical sensor, not shown.
• the formed as a base plate middle leg 11 has on its the belt spool 14 side facing a closed surface 43 and has on the opposite side an open honeycomb structure 44 for reinforcement and stiffening.
• a circular passage 46 is formed, which serves for receiving or for carrying out the fastening serving for screwing.
• the passage 46 is surrounded by a solid edge 47.
• the thickness of the middle leg has its greatest extent D in the region of the upper end or of the annular rim 47 and decreases continuously in the direction of lower end 48. Starting from a region of equal thickness D around the passage 46 and the solid edge 47, the thickness of the middle leg is reduced in the direction of the lower end.
• the contour of the middle limb has an arcuate central region 49 adapted to the contour of the belt reel, which merges into an approximately linearly decreasing thickness of its lower region 50.
• the thickness D of the middle leg is in the region of the circular
• the distance of the central axis of the circular passage 46 to the upper edge is advantageously at least 15mm or at least 10mm to 15mm.
• the passage 46 for the screw Due to the relatively large thickness of the middle leg in the upper region, it is also possible to provide the passage 46 for the screw with a thread, so that eliminates a thread formation or the attachment of a threaded nut on the vehicle body.
• the U-shaped housing frame can be widened more elastically in the region of the lower end 48 than in the region of the upper end 45, which is reinforced for receiving the fastening forces.
• the belt reel 14 is inserted, so that the rim 32 of the belt reel and the edge 35 of the ratchet wheel 23 in the. circular recesses 30 and 33 is received.
• the lateral legs 12 and 13 again assume their initial position, in which the belt reel is fixed in the axial direction.
• the middle legs 11 opposite end faces 51 and 52 of the two lateral legs each have two mounting pins 53 and 54 and radially extending recesses 55 and 56 on.
• the fastening pins 53 and 54 correspond to fastening openings 57 and 58 of a reinforcing plate 59 by which the open end side of the U-shaped housing frame is closed in the final assembled state.
• This reinforcing plate has a series of projections 60, 61 which correspond to the recesses 55 and 56 in the end faces of the legs.
• To increase the rigidity of the reinforcing plate is arcuate and has the shape of a lateral surface which surrounds the belt reel radially.
• the reinforcing plate consists essentially of a rectangular frame 62, which is curved in the circumferential direction of the belt reel. To achieve sufficient rigidity of the frame 62 is stiffened with an X-shaped reinforcing web 63. To improve the mounting in the vehicle and to turn the
• hook-like projections 65 are formed on the rear side 64 of the middle leg, which correspond with corresponding openings in the vehicle body. These projections can also serve as an assembly aid by means of which the belt retractor is mounted in the vehicle body.
• projections 65 can also be designed so that they are load-bearing, that is, that these projections can be introduced into the vehicle body loads.
• the middle leg 11 may, at its lower end 48, as shown in Figure 5, have a straight edge 66 connecting the two lateral legs.
• this edge 66 arcuate, as shown in Figure 1, wherein the arc extends in the direction of attachment point.
• the edge 67 of the middle leg 11 extends arcuately outwardly from the lateral legs.
• the length of the middle leg measured between its lower end 48 and the upper end 45 is greater than the corresponding length of the lateral legs.
• the arcuate edge 67 is preferably formed closed.
• Arcuate transitions 68 and 69 extend from this edge into the lateral legs which increase the rigidity of the housing frame in its upper region.
• the arcuate transitions advantageously have one
• the frame and the reinforcing plate are made of plastic, which is made reinforced to increase the strength, for example with glass fibers. In this case, in particular so-called long glass fibers are preferred.
• the variant of the housing frame shown in Figure 7 differs from the previously described by additional fasteners with which the belt retractor can be attached to the vehicle body.
• the lateral legs 12 and 13 each have a projection 70, 71 which is in a plane with the middle leg. These projections project beyond the lower end of the middle leg in this embodiment.
• locking elements 72, 73 are formed, which are integrally formed with the housing frame.
• locking elements engage in not shown receiving openings of the vehicle body or at the installation site and serve both as additional anti-rotation and as additional load-bearing elements, by which the loads occurring at the upper attachment point can be reduced.
• the vibration behavior of the built-in belt retractor in the vehicle environment can be improved with these additional fasteners.
• the arrangement of the locking element 72, 73 is only an example. These can also be formed elsewhere in the vehicle body side facing the side legs or the middle leg.
• the arrangement shown here has the advantage that, together with the screw in the region of the passage 46, a three-point support or attachment results, which is particularly stable and is advantageous in terms of their vibration properties.
• Housing frames 10 differ from those described above by the additional function, e.g. known belt tensioning unit 101 with the housing frame 10 integrally form.
• the advantage is a significant weight and cost savings over known belt tensioner systems. These embodiments are therefore e.g. extremely important in seat-integrated systems to avoid a high center of gravity in the seat back, or for weight-optimized vehicles.
• the pawl 37 has a toothed head portion 70 which cooperates with the toothing 39 of the ratchet wheel.
• Foot section 71 has two integrally formed bearing journals 72, 73. One of the two bearing pins is guided in a bearing bore 74 of the housing frame.
• the opposite journal is in a bearing bore 75 of the
• Pawl can also be provided with bearing bores in the corresponding
• Axis be plugged.
• the foot portion 71 of the pawl is formed wider than the head portion 70.
• the thickness D of the foot portion is in this
• Embodiment about twice as large as the thickness d of the head portion.
• the thickness d of the head section depends on the materials chosen
• Embodiment 4.4mm Depending on the thickness d of the head portion 70 is the opening width of the passage 36. This opening width is adapted to the thickness d of the head portion that the pawl without contact by this
• the side walls 81, 82 of the passage additionally serve to guide the pawl in the event of strong accelerations or forces in the transverse direction. Thus, the coverage of the cooperating teeth in each operating state is maintained.
• the receiving space 40 for the pawl has a support surface 76 which faces the arcuate foot portion 71.
• the support surface is also a circular arc in longitudinal section through the belt retractor and surrounds the foot section with a small distance. The distance between the support surface 76 and the foot portion 71 is selected so that the support pawl can pivot without contact to the support surface, provided that no load from the belt reel or the Ratchet is transmitted to the pawl. Under load, the
• Receiving space 40 is formed as a contact surface 77.
• the inclination of the contact surface 77 is selected so that the facing side surface 78 of the pawl comes to rest flatly when all the teeth 79 of the pawl with the teeth of the ratchet wheel are engaged.
• Tooth 80 of four teeth of the gear 79 in engagement with the teeth of the ratchet wheel By further rotation of the belt reel or the ratchet wheel, the pawl is further pivoted, so that the other three teeth reach into engagement with the toothing of the ratchet wheel. By acting on the webbing belt on the belt take-off forces this is then moved in the direction of the toothing 38, so that the teeth of the ratchet wheel comes into engagement with this. Are then all the teeth of the pawl into engagement, the pawl comes to rest on the contact surface 77. Another pivoting and thus a rotation of the ratchet wheel are then prevented.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Automotive Seat Belt Assembly (AREA)
• Motor Or Generator Frames (AREA)
• Vehicle Step Arrangements And Article Storage (AREA)

Priority Applications (9)

Applications Claiming Priority (4)

Publications (2)

Family

ID=43348277

Family Applications (1)

Country Status (10)

Cited By (3)

Families Citing this family (15)

Citations (1)

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• 2010
  • 2010-08-20 IN IN2198DEN2012 patent/IN2012DN02198A/en unknown
  • 2010-08-20 ES ES10754413.2T patent/ES2511054T3/es active Active
  • 2010-08-20 EP EP10754413.2A patent/EP2467282B1/de active Active
  • 2010-08-20 PL PL10754413T patent/PL2467282T3/pl unknown
  • 2010-08-20 US US13/391,653 patent/US9238448B2/en active Active
  • 2010-08-20 RU RU2012109913/11A patent/RU2537366C2/ru active
  • 2010-08-20 CN CN201080047004.5A patent/CN102712290B/zh active Active
  • 2010-08-20 WO PCT/EP2010/005122 patent/WO2011023336A2/de active Application Filing
  • 2010-08-20 KR KR1020127007266A patent/KR101715969B1/ko not_active Expired - Fee Related
  • 2010-08-20 BR BR112012003856-7A patent/BR112012003856B1/pt not_active IP Right Cessation

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