WO2017069094A1 - Dispositif d'enroulement de sangle - Google Patents

Dispositif d'enroulement de sangle Download PDF

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Publication number
WO2017069094A1
WO2017069094A1 PCT/JP2016/080740 JP2016080740W WO2017069094A1 WO 2017069094 A1 WO2017069094 A1 WO 2017069094A1 JP 2016080740 W JP2016080740 W JP 2016080740W WO 2017069094 A1 WO2017069094 A1 WO 2017069094A1
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WO
WIPO (PCT)
Prior art keywords
spool
flywheel
gear
webbing
inertial body
Prior art date
Application number
PCT/JP2016/080740
Other languages
English (en)
Japanese (ja)
Inventor
弥 梁川
啓太 中根
Original Assignee
株式会社東海理化電機製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社東海理化電機製作所 filed Critical 株式会社東海理化電機製作所
Publication of WO2017069094A1 publication Critical patent/WO2017069094A1/fr

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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
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • 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

Definitions

  • the present invention relates to a webbing take-up device in which when an inertial body is connected to a spool, the rotation of the spool is transmitted to the inertial body so that the inertial body exerts an inertial force on the spool.
  • the inertial mass can appropriately apply the inertial force to the reel body.
  • the present invention has an object to obtain a webbing take-up device that allows the inertial body to appropriately apply an inertial force to the spool in consideration of the above facts.
  • the webbing take-up device includes a spool that is wound up by a webbing to be mounted on an occupant and rotated in the pull-out direction when the webbing is pulled out, and the spool that is connected to the spool.
  • An inertial body that transmits the rotation of the spool and applies an inertial force to the spool, and the inertial body is connected to the spool when the spool is accelerated and rotated in the pull-out direction, and the spool rotates at a reduced speed in the pull-out direction.
  • Connecting means that does not connect the inertial body to the spool.
  • the webbing take-up device includes a spool that is wound up by a webbing to be mounted on an occupant and rotated in the pull-out direction when the webbing is drawn out, and the spool that is connected to the spool.
  • An inertial body that transmits the rotation of the spool and applies an inertial force to the spool; a pulling load of the webbing from the spool; a pulling speed of the webbing from the spool; an occupant's physique; and a vehicle acceleration Connection means for selecting connection or disconnection of the inertial body to the spool corresponding to one.
  • the webbing take-up device of the third aspect of the present invention is the webbing take-up device of the first aspect or the second aspect of the present invention, wherein the pulling load of the webbing from the spool, the pulling speed of the webbing from the spool, Switching means is provided for switching at least one of the mass of the inertial body and the acceleration of the rotation of the spool transmitted to the inertial body corresponding to at least one of the physique of the occupant and the acceleration of the vehicle.
  • the webbing to be mounted on the occupant is taken up on the spool, and the spool is rotated in the drawing-out direction when the webbing is drawn out. Further, when the inertial body is connected to the spool, the rotation of the spool is transmitted to the inertial body, and the inertial body exerts an inertial force on the spool.
  • the connecting means connects the inertial body to the spool. For this reason, the acceleration rotation in the pull-out direction of the spool is transmitted to the inertial body, and the inertial body acts an inertial force in the direction opposite to the pull-out direction on the spool, thereby limiting the rotation of the spool in the pull-out direction. Thus, the withdrawal of the webbing from the spool is limited.
  • the connecting means does not connect the inertial body to the spool. For this reason, it is possible to prevent the inertial body from acting on the spool with the inertial force in the pulling direction by transmitting the deceleration rotation in the pulling direction of the spool to the inertial body, and the inertial body appropriately applies the inertial force to the spool. Can do.
  • the webbing to be mounted on the occupant is taken up on the spool, and the spool is rotated in the drawing direction when the webbing is drawn out. Further, when the inertial body is connected to the spool, the rotation of the spool is transmitted to the inertial body, and the inertial body exerts an inertial force on the spool.
  • connection means is connected to and disconnected from the inertial body to the spool in accordance with at least one of the pulling load from the spool of the webbing, the pulling speed from the spool of the webbing, the physique of the occupant, and the acceleration of the vehicle. And select. Therefore, the inertial body can apply an inertial force to the spool in accordance with at least one of the pulling load from the webbing spool, the pulling speed from the webbing spool, the occupant's physique, and the acceleration of the vehicle. The inertial body can appropriately apply an inertial force to the spool.
  • the switching means corresponds to at least one of the drawing load from the webbing spool, the drawing speed from the webbing spool, the physique of the occupant, and the acceleration of the vehicle. , And switching at least one of the mass of the inertial body and the acceleration of the rotation of the spool transmitted to the inertial body. Therefore, the inertial force that the inertial body acts on the spool can be effectively adapted to at least one of the pulling load from the spool of the webbing, the pulling speed of the webbing from the spool, the physique of the occupant, and the acceleration of the vehicle. it can.
  • FIG. 2 is a sectional view (sectional view taken along line 2-2 in FIG. 1) viewed from one side showing a one-way clutch portion of the webbing take-up device according to the first embodiment of the present invention. It is sectional drawing seen from the back which shows when the inertial force which acts on the inertial body in the webbing winding device concerning a 1st embodiment of the present invention is large. It is sectional drawing seen from the back which shows when the inertial force which acts on the inertial body in the webbing winding device concerning a 1st embodiment of the present invention is inside.
  • FIG. 8 is a cross-sectional view of the first planetary gear portion of FIG. 7 as seen from one side (cross-sectional view taken along line 8-8 in FIG. 7).
  • FIG. 8 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 7) of the second carrier portion of FIG. 7 as viewed from one side.
  • FIG. 8 is a cross-sectional view of the second planetary gear portion of FIG. 7 as seen from one side (a cross-sectional view taken along the line BB of FIG. 7).
  • FIG. 11 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 10) of the second carrier portion of FIG.
  • FIG. 11 is a cross-sectional view (cross-sectional view taken along the line BB of FIG. 10) viewed from one side showing the second planetary gear portion of FIG.
  • FIG. 1 shows a cross-sectional view of a webbing take-up device 10 according to a first embodiment of the present invention as seen from the rear.
  • the front side of the vehicle one in the vehicle front-rear direction
  • the upper side is indicated by an arrow UP.
  • the webbing take-up device 10 is installed in a vehicle, and the front, one side, and the upper side of the webbing take-up device 10 are directed outward in the vehicle width direction, the vehicle front, and the upper, respectively. .
  • a webbing take-up device 10 includes a frame 12 having a U-shaped cross section as a support member.
  • the frame 12 includes a back plate (not shown) and a leg plate on one side. 12A and leg plates 12B on the other side are provided.
  • the frame 12 is fixed to the vehicle body at the back plate, whereby the webbing take-up device 10 is installed in the vehicle.
  • a substantially cylindrical spool 14 is rotatably supported between the leg plate 12A and the leg plate 12B of the frame 12, and the end of the spool 14 on the leg plate 12B side has a circular through hole 12D of the leg plate 12B. It penetrates.
  • a long belt-like webbing 16 is wound around the spool 14 from the longitudinal base end side, and when the spool 14 is rotated in the winding direction, the webbing 16 is wound around the spool 14 and the spool 14 When the webbing 16 is pulled out from the spool 14, the spool 14 is rotated in the pulling-out direction. Further, by pulling out the webbing 16 from the spool 14, the webbing 16 is attached to the occupant seated in the vehicle seat.
  • the spool 14 is provided with a first force limiter mechanism 18 as a limiting mechanism.
  • the first force limiter mechanism 18 is provided with a metal substantially cylindrical torsion shaft 20 as an energy absorbing member, and the torsion shaft 20 is disposed coaxially in the spool 14.
  • the other end 20B of the torsion shaft 20 on the leg plate 12B side is coupled to the spool 14 so as to be integrally rotatable, whereby the torsion shaft 20 is integrally rotatable with the spool 14.
  • one end 20A on the leg plate 12A side of the torsion shaft 20 protrudes toward the leg plate 12A side of the spool 14 and penetrates the circular through hole 12C of the leg plate 12A of the frame 12.
  • a substantially disc-shaped lock gear 22 as a restricting member is coaxially provided on the leg plate 12A side of the spool 14, and the lock gear 22 passes through the through hole 12C of the leg plate 12A.
  • One end 20 ⁇ / b> A of the torsion shaft 20 is coaxially coupled to the lock gear 22 so as to rotate integrally therewith, so that the lock gear 22 can rotate integrally with the spool 14 and the torsion shaft 20.
  • ratchet teeth are formed on the entire outer periphery of the lock gear 22.
  • a lock mechanism (not shown) as a restricting means is provided outside the leg plate 12A of the frame 12, and a lock plate (not shown) as a restricting portion is provided in the lock mechanism.
  • the lock plate is rotatably supported by the leg plate 12A, and is locked when the vehicle collides (when the vehicle is suddenly decelerated during emergency of the vehicle or when the webbing 16 is suddenly pulled out from the spool 14). Is operated and the lock plate is rotated so that the lock plate meshes with the ratchet teeth of the lock gear 22 and the rotation of the lock gear 22 in the pull-out direction is restricted (locked) (the winding direction of the lock gear 22) Rotation is allowed).
  • a pretensioner mechanism 24 as a winding mechanism is provided on the outer side of the leg plate 12A of the frame 12, and when the vehicle collides (when a vehicle collision, which is an emergency of the vehicle is detected), the pretensioner mechanism 24, the lock gear 22 is suddenly rotated in the winding direction by the pressure of the high-pressure gas generated instantaneously. Further, after the operation of the pretensioner mechanism 24 is started, the rotation of the lock gear 22 in the pull-out direction is restricted (locked) by the pretensioner mechanism 24 (the rotation of the lock gear 22 in the winding direction is allowed).
  • An urging mechanism (not shown) is provided outside the leg plate 12A of the frame 12, and the urging mechanism is connected to the torsion shaft 20 or the lock gear 22 to urge the spool 14 in the winding direction. .
  • a second force limiter mechanism 26 as an inertia mechanism is provided outside the leg plate 12B of the frame 12.
  • the second force limiter mechanism 26 is provided with a box-shaped housing 28 (see FIG. 7).
  • the housing 28 is open to the leg plate 12B side and is fixed to the leg plate 12B.
  • a clutch mechanism 30 is provided as an operating mechanism that constitutes connection means.
  • the clutch mechanism 30 is installed on the end face of the spool 14 on the leg plate 12B side. As described above, when the rotation of the spool 14 in the pull-out direction with respect to the lock gear 22 is started, the clutch mechanism 30 is operated.
  • a speed increasing mechanism 32 as a transmission mechanism constituting the connecting means is supported.
  • the speed increasing mechanism 32 is provided with an annular clutch gear 34 as an operating gear, and the clutch gear 34 is arranged coaxially with the spool 14.
  • the clutch gear 34 is disposed on the outer periphery of the clutch mechanism 30. When the clutch mechanism 30 is operated, the clutch mechanism 30 is engaged with the inner periphery of the clutch gear 34, and the clutch gear 34 is connected to the spool 14. It can be rotated integrally in the pull-out direction.
  • the speed increasing mechanism 32 is provided with a speed increasing gear 36 as an intermediate gear, and the axial direction of the speed increasing gear 36 is arranged in parallel with the axial direction of the clutch gear 34.
  • a small-diameter gear 36A and a large-diameter gear 36B are provided coaxially and integrally with the speed increasing gear 36, and the outer periphery of the clutch gear 34 is meshed with the outer periphery of the small-diameter gear 36A. For this reason, when the clutch gear 34 is rotated in the pull-out direction, the speed increasing gear 36 (the small-diameter gear 36A and the large-diameter gear 36B) is rotated in the pull-out direction.
  • the speed increasing mechanism 32 is provided with a gear shaft 38 as a connection gear, and the axial direction of the gear shaft 38 is arranged in parallel with the axial direction of the speed increasing gear 36.
  • a final gear 38A is coaxially provided on the spool 14 side portion of the gear shaft 38, and the outer periphery of the large gear 36B of the speed increasing gear 36 is meshed with the outer periphery of the final gear 38A.
  • a cylindrical clutch shaft 38B is coaxially provided on a portion of the gear shaft 38 opposite to the spool 14, and the clutch shaft 38B has a diameter larger than that of the final gear 38A.
  • the gear shaft 38 is provided with a disc-shaped outer peripheral plate 38C coaxially between the final gear 38A and the clutch shaft 38B.
  • the outer peripheral plate 38C has a diameter that is larger than that of the final gear 38A and the clutch shaft 38B. Has been increased.
  • An inertia body 40 is supported in the housing 28 on the opposite side of the gear shaft 38 from the spool 14, and the inertia body 40 includes, in order from the spool 14 side, a substantially cylindrical first flywheel 42, a first flywheel 42. Two flywheels 44 and a third flywheel 46 are provided. The first flywheel 42, the second flywheel 44, and the third flywheel 46 are arranged coaxially with the gear shaft 38, and the first flywheel 42, the second flywheel 44, and the third flywheel 46 are Each is made rotatable.
  • the outer diameters of the first flywheel 42, the second flywheel 44, and the third flywheel 46 are the same, and the entire outer circumference of the first flywheel 42, the second flywheel 44, and the third flywheel 46 is the same.
  • the external teeth 40A are respectively formed.
  • a substantially disc-shaped partition wall 42A is provided integrally and coaxially in the middle in the axial direction.
  • the partition wall 42A is a part on the spool 14 side in the first flywheel 42. And a portion opposite to the spool 14 are separated.
  • An annular clutch ring 42B is integrally and coaxially provided in the first flywheel 42 on the spool 14 side of the partition wall 42A, and the clutch shaft 38B of the gear shaft 38 is provided in the clutch ring 42B.
  • the outer peripheral plate 38C of the gear shaft 38 is in contact with the surface of the clutch ring 42B on the spool 14 side.
  • a plurality of substantially trapezoidal clutch holes 48 are formed in the clutch ring 42B, and the plurality of clutch holes 48 are arranged at equal intervals in the circumferential direction of the clutch ring 42B.
  • the opposite side of the clutch hole 48 from the spool 14 is closed by a partition wall 42 ⁇ / b> A, and the spool 14 side of the clutch hole 48 is closed by an outer peripheral plate 38 ⁇ / b> C of the gear shaft 38.
  • the clutch hole 48 is opened inward in the radial direction of the clutch ring 42B, and the clutch ring 42B radially outer surface of the clutch hole 48 is formed into a flat clutch surface 48A, and the clutch ring 42B as it goes in the pull-out direction. It is inclined in the direction toward the radially inner side.
  • the clutch hole 48 is provided with a one-way clutch 50 as a connection mechanism constituting connection means.
  • the one-way clutch 50 includes a cylindrical clutch roller 50A as a connection member and a coil shape as a connection biasing member. Clutch spring 50B.
  • the clutch roller 50A is arranged in parallel with the clutch ring 42B, and the clutch spring 50B urges the clutch roller 50A in the pull-out direction side so as to contact the outer peripheral surface of the clutch shaft 38B and the clutch surface 48A. ing.
  • a switching mechanism 52 as switching means is provided in the housing 28.
  • the switching mechanism 52 is provided with a cylindrical connector 54 as a switching member.
  • the connector 54 is provided on the outer periphery of the inertial body 40 (the first flywheel 42, the second flywheel 44, and the third flywheel 46). Has been placed.
  • Inner teeth 54 ⁇ / b> A are provided on the entire inner periphery of the connector 54, and the inner teeth 54 ⁇ / b> A mesh with the outer teeth 40 ⁇ / b> A of the first flywheel 42, the second flywheel 44, and the third flywheel 46.
  • An annular plate-like engagement plate 54B is integrally provided on the outer periphery of the connector 54. The engagement plate 54B protrudes radially outward of the connector 54 and is disposed coaxially with the connector 54. .
  • the switching mechanism 52 is provided with an electromagnetic or pyro type actuator 56 as a driving means, and the output shaft of the actuator 56 is arranged in parallel with the axial direction of the inertial body 40.
  • a slider 56A as a driving member is fixed to the output shaft of the actuator 56, and an engagement plate 54B of the connector 54 is engaged with the slider 56A so as to be rotatable and integrally movable in the axial direction.
  • the connector 54 is movable to the spool 14 side and the side opposite to the spool 14 together with the output shaft of the actuator 56 and the slider 56A.
  • the actuator 56 is electrically connected to a vehicle control device 58, and the actuator 56 is operated by the control of the control device 58.
  • a vehicle detection device 60 is electrically connected to the control device 58, and the detection device 60 loads the passenger's seat (for example, a seat cushion) and pulls out the webbing 16 attached to the passenger from the spool 14.
  • the occupant's physique (for example, body weight) is detected based on at least one of the quantity and the captured image of the occupant.
  • the webbing 16 is pulled out from the spool 14 and the webbing 16 is attached to the occupant. Further, the spool 14 is rotated in the winding direction by the biasing force of the biasing mechanism, and the webbing 16 is wound around the spool 14, so that the slack of the webbing 16 attached to the occupant is removed.
  • an inertial force is applied to the occupant by the deceleration of the vehicle (see the collision floor G in FIG. 6A corresponding to the inertial force applied to the occupant). Further, as at least one of the vehicle deceleration acceleration (intensity of collision) and the occupant's physique increases, the inertial force acting on the occupant increases, and the occupant pulls out the webbing 16 from the spool 14 (drawing load). ) Becomes larger.
  • the lock mechanism When the vehicle collides, the lock mechanism is operated in the first force limiter mechanism 18, and the lock plate is engaged with the ratchet teeth of the lock gear 22, so that the rotation of the lock gear 22 in the pull-out direction is restricted, and the torsion shaft The rotation of the spool 14 in the pulling-out direction is restricted via 20. Accordingly, the occupant is restrained by the webbing 16 by restricting the pulling of the webbing 16 from the spool 14.
  • the pretensioner mechanism 24 is operated, whereby the lock gear 22 is rapidly rotated in the winding direction, and the spool 14 is rapidly rotated in the winding direction via the torsion shaft 20.
  • the webbing 16 is abruptly wound around the spool 14, thereby increasing the occupant's restraining force due to the webbing 16.
  • the pretensioner mechanism 24 restricts the rotation of the lock gear 22 in the pull-out direction.
  • the pull-out load of the webbing 16 from the spool 14 (rotational load in the pull-out direction of the spool 14) by the occupant is greater than the torsional load of the torsion shaft 20.
  • the torsion shaft 20 is twisted to allow the spool 14 to rotate in the pull-out direction with respect to the lock gear 22.
  • the clutch mechanism 30 When the permissible rotation of the spool 14 in the pull-out direction with respect to the lock gear 22 is started, the clutch mechanism 30 is operated in the second force limiter mechanism 26, so that the clutch mechanism 30 is connected to the clutch gear of the speed increasing mechanism 32.
  • the clutch gear 34 is rotated integrally with the spool 14 in the pull-out direction. Therefore, in the speed increasing mechanism 32, the gear shaft 38 (final gear 38A, clutch shaft 38B and outer peripheral plate 38C) is rotated in the pull-out direction via the speed increasing gear 36 (small diameter gear 36A and large diameter gear 36B).
  • the rotational speed of the gear shaft 38 is increased with respect to the rotational speed of the spool 14.
  • the pull-out load of the webbing 16 from the spool 14 by the occupant is the torsion-resistant load of the torsion shaft 20 (F1 in FIG. 6B, hereinafter referred to as “first force limiter load”) and the load due to the inertial force acting on the inertial body 40.
  • first force limiter load the torsion-resistant load of the torsion shaft 20
  • second force limiter load the load due to the inertial force acting on the inertial body 40.
  • the actuator 56 of the switching mechanism 52 is operated by the control of the control device 58 before the vehicle collision, as shown in FIG. Instead, the inner teeth 54 ⁇ / b> A of the connector 54 of the switching mechanism 52 are engaged with the outer teeth 40 ⁇ / b> A of the first flywheel 42, the second flywheel 44, and the third flywheel 46 of the inertial body 40. Therefore, when the inertia body 40 is accelerated and rotated in the pull-out direction integrally with the gear shaft 38, the first flywheel 42, the second flywheel 44, and the third flywheel 46 together with the connector 54 are integrally moved in the pull-out direction.
  • the actuator 56 When the detection device 60 detects that the occupant's physique is medium (standard physique), the actuator 56 is operated by the control of the control device 58 before the vehicle collision, as shown in FIG. Then, the output shaft of the actuator 56, the slider 56A, and the connector 54 are moved to the spool 14 side, so that the inner teeth 54A of the connector 54 become the outer teeth 40A of the first flywheel 42 and the second flywheel 44 of the inertial body 40. (Meshing with the external teeth 40A of the third flywheel 46 is released). For this reason, when the inertial body 40 is accelerated and rotated in the pulling direction integrally with the gear shaft 38, the first flywheel 42 and the second flywheel 44 together with the connector 54 are accelerated and rotated in the pulling direction.
  • the inertia force in the winding direction is applied to the first flywheel 42 and the second flywheel 44.
  • the second force limiter load by the inertial body 40 is changed to a load by the inertial force acting on the first flywheel 42 and the second flywheel 44 to be a medium load, thereby appropriately Can protect.
  • the actuator 56 is operated by the control of the control device 58 before the vehicle collision, and the output of the actuator 56 is output.
  • the shaft, slider 56A, and connector 54 By moving the shaft, slider 56A, and connector 54 toward the spool 14, the inner teeth 54A of the connector 54 are engaged with the outer teeth 40A of the first flywheel 42 of the inertial body 40 (the second flywheel 44 and the second flywheel 44). 3) The meshing with the external teeth 40A of the flywheel 46 is released.
  • the inertial body 40 is accelerated and rotated in the pulling direction integrally with the gear shaft 38, the first flywheel 42 together with the connector 54 is accelerated and rotated in the pulling direction, so that the first flywheel 42 is wound.
  • An inertial force in the take direction is applied.
  • the second force limiter load by the inertial body 40 is reduced to a low load by the inertial force acting on the first flywheel 42, so that a small passenger can be appropriately protected.
  • the mass of the rotating inertial body 40 (the number of flywheels) is increased, and the inertial force acting on the inertial body 40 in the winding direction is increased.
  • the second force limiter load by the inertial body 40 can be switched to a load adapted to the occupant's physique (the pulling load from the spool 14 of the webbing 16) by switching the mass of the rotating inertial body 40.
  • the acceleration of the webbing 16 pulled out from the spool 14 by the occupant increases and acts on the inertial body 40.
  • the inertial force in the winding direction is increased.
  • the second force limiter load by the inertial body 40 can be a load adapted to at least one of the vehicle deceleration acceleration (collision severity) and the occupant's physique.
  • the first flywheel is driven by the inertial force acting on the inertia body 40 in the pull-out direction.
  • 42 (clutch ring 42B) exerts a rotational force in the pull-out direction on the gear shaft 38 (clutch shaft 38B), so that the outer peripheral surface of the clutch shaft 38B and the clutch surface 48A of the clutch ring 42B (clutch hole 48)
  • the engagement of the clutch roller 50 ⁇ / b> A is released, and the gear shaft 38 is not rotated in the pull-out direction integrally with the inertia body 40.
  • the inertia force acting on the inertia body 40 in the pulling direction is transmitted to the spool 14 via the clutch roller 50A, the speed increasing mechanism 32 (the gear shaft 38, the speed increasing gear 36 and the clutch gear 34) and the clutch mechanism 30. Is suppressed.
  • the actuator 56, the slider 56A, and the connector 54 are used to switch the connection between the first flywheel 42, the second flywheel 44, and the third flywheel 46 of the inertial body 40.
  • first flywheel 42, the second flywheel 44, and the third flywheel 46 of the inertial body 40 may be switched between connection and non-connection according to deceleration acceleration at the time of a vehicle collision.
  • first flywheel 42 and the second flywheel 44 are connected via a first urging member that constitutes a switching means, and the second flywheel 44 and the third flywheel 46 constitute a switching means.
  • the second biasing member is connected.
  • the second flywheel 44 is the first flywheel 42 to the first flywheel 42.
  • the third flywheel 46 is not connected to the second flywheel 44 by the biasing force of the biasing member, and the second flywheel 44 is moved to the second flywheel 44 even if an inertial force is applied to the second flywheel 44 side. It is not connected by the urging force. For this reason, only the first flywheel 42 is rotated in the pull-out direction, whereby the second force limiter load by the inertial body 40 is changed to a load due to the inertial force acting on the first flywheel 42.
  • the second force limiter load by the inertial body 40 is switched to a load suitable for the deceleration acceleration (the pulling load from the spool 14 of the webbing 16) when the vehicle collides by switching the mass of the rotating inertial body 40. be able to.
  • first flywheel 42, the second flywheel 44, and the third flywheel 46 of the inertial body 40 are connected by the pulling speed of the webbing 16 from the spool 14 by the occupant (the rotational speed of the clutch gear 34 in the pulling direction). And unconnected may be switched.
  • the first flywheel 42 is provided with a first centrifugal clutch that constitutes a switching unit with the second flywheel 44, and the switching unit is configured with the second flywheel 44 between the third flywheel 46.
  • a second centrifugal clutch is provided.
  • the second flywheel 44 When the pulling speed of the webbing 16 from the spool 14 by the occupant is small, the second flywheel 44 is not connected to the first flywheel 42 by the first centrifugal clutch even if centrifugal force is applied to the first centrifugal clutch. At the same time, centrifugal force is not applied to the second centrifugal clutch, and the third flywheel 46 is not connected to the second flywheel 44 by the second centrifugal clutch. For this reason, only the first flywheel 42 is rotated in the pull-out direction, whereby the second force limiter load by the inertial body 40 is changed to a load due to the inertial force acting on the first flywheel 42.
  • the second force limiter load by the inertial body 40 can be switched to a load adapted to the pulling speed of the webbing 16 from the spool 14 by the occupant by switching the mass of the inertial body 40 to be rotated.
  • the inertial body 40 is provided with three flywheels (first flywheel 42, second flywheel 44, and third flywheel 46). However, the inertial body 40 may be provided with two or four or more flywheels.
  • FIG. 7 shows a cross-sectional view of the webbing take-up device 70 according to the second embodiment of the present invention as seen from the rear.
  • the webbing take-up device 70 according to the present embodiment has substantially the same configuration as the first embodiment, but differs in the following points.
  • a substantially disc-shaped first carrier 34 ⁇ / b> A is formed on the surface of the clutch gear 34 on the spool 14 side.
  • a predetermined number (two in this embodiment) of the first planetary gears 72 is rotatably supported on the peripheral portion of the first carrier 34A on the side opposite to the spool 14.
  • the predetermined number of first planetary gears 72 are arranged such that their center axes are parallel to the center axis of the first carrier 34A (clutch gear 34) and in the circumferential direction of the first carrier 34A. It is arranged at equal intervals.
  • the speed increasing mechanism 32 is provided with a substantially annular ratchet ring 74 on the outer periphery of a predetermined number of first planetary gears 72, and the ratchet ring 74 is arranged coaxially with the clutch gear 34.
  • a first internal gear 74A is coaxially provided on the inner peripheral side portion of the ratchet ring 74, and a predetermined number of first planetary gears 72 are meshed with the first internal gear 74A.
  • a ratchet gear 74B (external gear) is provided coaxially on the outer peripheral side portion of the ratchet ring 74.
  • the speed increasing mechanism 32 is provided with a carrier gear 76 on the side opposite to the spool 14 of the predetermined number of first planetary gears 72, and the carrier gear 76 is arranged coaxially with the clutch gear 34.
  • a first sun gear 76A is coaxially provided on the spool 14 side portion of the carrier gear 76, and a predetermined number of first planetary gears 72 are engaged with the first sun gear 76A.
  • a second carrier 76B is coaxially provided on the opposite side of the carrier gear 76 from the spool 14, and the entire outer periphery of the second carrier 76B has external teeth 76C. Is provided.
  • a predetermined number (two in this embodiment) of second planetary gears 78 are rotatably supported on the peripheral portion of the second carrier 76B on the side opposite to the first sun gear 76A.
  • the predetermined number of second planetary gears 78 are arranged such that their center axes are parallel to the center axis of the second carrier 76B (carrier gear 76) and are equally spaced in the circumferential direction of the second carrier 76B. Yes.
  • the inertia body 40 is provided with only the first flywheel 42 (the second flywheel 44 and the third flywheel 46 are not provided), and the first flywheel 42 is connected to the spool 14 of the carrier gear 76. Is disposed coaxially with the carrier gear 76 on the opposite side.
  • the partition wall 42A of the first flywheel 42 is disposed at the end on the second carrier 76B side in the first flywheel 42, and the second sun gear 42C is integrally and coaxially provided on the partition wall 42A. .
  • the second sun gear 42C protrudes toward the second carrier 76B, and a predetermined number of second planetary gears 78 are engaged with the second sun gear 42C.
  • the switching mechanism 52 is provided with a substantially annular transmission ring 80 as a switching member on the outer periphery of a predetermined number of second planetary gears 78, and the transmission ring 80 is arranged coaxially with the carrier gear 76. .
  • a second internal gear 80A is coaxially provided on the inner peripheral portion of the transmission ring 80, and a predetermined number of second planetary gears 78 are engaged with the second internal gear 80A.
  • a fixed gear 80 ⁇ / b> B (external gear) is coaxially provided on the outer peripheral side portion of the transmission ring 80.
  • An annular plate-like engagement plate 80C is integrally provided on the outer periphery of the transmission ring 80 at the end on the second carrier 76B side, and the engagement plate 80C projects outward in the radial direction of the transmission ring 80. At the same time, it is arranged coaxially with the transmission ring 80.
  • the engagement plate 80C is engaged with the slider 56A of the output shaft of the actuator 56 so as to be rotatable and integrally movable in the axial direction.
  • the switching mechanism 52 is provided with fixed teeth 82, and the fixed teeth 82 are fixed in the housing 28.
  • the fixed tooth 82 meshes with the fixed gear 80B of the transmission ring 80, whereby the rotation of the transmission ring 80 is restricted.
  • a ratchet pawl 84 as a connecting member constituting the connecting means is provided on the outer periphery of the ratchet ring 74 (ratchet gear 74B), and the ratchet pawl 84 is rotatably supported in the housing 28.
  • the ratchet pawl 84 is engaged with the ratchet gear 74B by applying an urging force, whereby the ratchet pawl 84 is restricted (locked) by the ratchet pawl 84 in the drawing direction (the direction of arrow B in FIG. 8). (The rotation of the ratchet ring 74 in the winding direction (the direction of arrow A in FIG. 8) is allowed).
  • the first carrier 34A, the predetermined number of first planetary gears 72, the first internal gear 74A, and the first sun gear 76A constitute a first planetary gear
  • the second carrier 76B, the predetermined number of second gears constitute a second planetary gear.
  • the second force limiter mechanism 26 When the clutch mechanism 30 is operated, the clutch mechanism 30 is engaged with the inner periphery of the clutch gear 34 of the speed increasing mechanism 32, and the clutch gear 34 is rotated integrally with the spool 14 in the pull-out direction. For this reason, as shown in FIG. 8, in the speed increasing mechanism 32, the first carrier 34A of the clutch gear 34 is rotated in the pull-out direction, and a predetermined number of first planetary gears 72 are revolved in the pull-out direction.
  • the predetermined number of first planetary gears 72 are accelerated and revolved in the pulling direction, whereby the predetermined number of first planetary gears 72 are accelerated and rotated, and the carrier gear 76 (first sun gear 76A) is accelerated and rotated in the pulling direction.
  • the rotational speed (rotational angular speed) of the carrier gear 76 is increased with respect to the rotational speed (rotational angular speed) of the spool 14.
  • the second carrier 76B of the carrier gear 76 is accelerated and rotated in the pull-out direction, and a predetermined number of second planetary gears 78 are accelerated and revolved in the pull-out direction, whereby the first flywheel 42 (second sun gear of the inertial body 40).
  • inertial body 40 (first flywheel 42) is accelerated and rotated in the pull-out direction, and the rotational speed of inertial body 40 (first flywheel 42) is increased relative to the rotational speed of spool 14. For this reason, an inertial force in the winding direction is applied to the inertial body 40, so that the inertial force in the winding direction applied to the inertial body 40 is increased by the speed increasing mechanism 32 (a predetermined number of second planetary gears 78, carriers).
  • the spool 76 is acted on via the gear 76, a predetermined number of first planetary gears 72 and clutch gears 34) and the clutch mechanism 30.
  • the pulling-out load of the webbing 16 from the spool 14 by the occupant is the torsion resistant load (first force limiter load) of the torsion shaft 20 and the load due to the inertial force acting on the inertial body 40 (second force limiter load).
  • first force limiter load the load due to the inertial force acting on the inertial body 40
  • second force limiter load the load due to the inertial force acting on the inertial body 40
  • the webbing 16 is allowed to be pulled out from the spool 14, so that the kinetic energy of the occupant is caused by the torsional deformation of the torsion shaft 20 and the inertial force applied to the inertial body 40. Absorbed to protect passengers.
  • the actuator 56 in the switching mechanism 52 is controlled by the control device 58 before the collision of the vehicle. Is not operated, the fixed gear 80B of the transmission ring 80 is engaged with the fixed teeth 82, and the rotation of the transmission ring 80 is restricted. For this reason, when the carrier gear 76 is accelerated and rotated in the pull-out direction as shown in FIG. 9A and the predetermined number of second planetary gears 78 are accelerated and revolved in the pull-out direction as shown in FIG. 9B, the predetermined number of second planetary gears.
  • the inertial body 40 (first flywheel 42) is accelerated and rotated in the pull-out direction by accelerating and rotating 78, and the rotational speed (rotational angular speed) of the inertial body 40 is set to the rotational speed (rotational angular speed) of the carrier gear 76. Increased speed. As described above, the rotation speed of the carrier gear 76 is increased with respect to the rotation speed of the spool 14, and the rotation speed of the inertia body 40 is increased with respect to the rotation speed of the carrier gear 76. By increasing the increase in the rotational speed of the inertial body 40, the rotational acceleration of the inertial body 40 is increased and the inertial force acting on the inertial body 40 is increased. Thereby, the 2nd force limiter load by inertial body 40 is made high load, and a large passenger can be protected appropriately.
  • the actuator 56 is operated by the control of the control device 58 before the vehicle collision, as shown in FIG.
  • the shaft, slider 56A, and transmission ring 80 are moved to the spool 14, the meshing of the transmission ring 80 (fixed gear 80B) with the fixed teeth 82 is released, and the transmission ring 80 is allowed to rotate and the transmission is performed.
  • the second internal gear 80A of the ring 80 is meshed with the external teeth 76C of the carrier gear 76 in addition to the predetermined number of second planetary gears 78. Therefore, when the carrier gear 76 is accelerated and rotated in the pull-out direction together with the transmission ring 80 as shown in FIG.
  • the inertial body 40 (first flywheel) is integrated with acceleration rotation in the pull-out direction of the carrier gear 76 and acceleration revolution in the pull-out direction of the predetermined number of second planetary gears 78 without the predetermined number of second planetary gears 78 rotating.
  • the wheel 42 is accelerated and rotated in the pull-out direction, and the rotation speed of the inertia body 40 is not increased with respect to the rotation speed of the carrier gear 76.
  • the rotation speed of the carrier gear 76 is increased with respect to the rotation speed of the spool 14
  • the rotation speed of the inertia body 40 is not increased with respect to the rotation speed of the carrier gear 76, and the rotation speed of the spool 14 is increased.
  • the increase in the rotational speed of the inertial body 40 with respect to is reduced, so that the rotational acceleration of the inertial body 40 is reduced and the inertial force acting on the inertial body 40 is reduced.
  • the 2nd force limiter load by inertial body 40 is made low load, and a small crew can be protected appropriately.
  • the rotational speed increase of the inertial body 40 is increased, and the inertial force acting on the inertial body 40 in the winding direction is increased.
  • the second force limiter load by the inertial body 40 can be switched to a load adapted to the occupant's physique (the pulling load from the spool 14 of the webbing 16) by switching the increase in the rotational speed of the inertial body 40.
  • the acceleration of the webbing 16 pulled out from the spool 14 by the occupant increases and acts on the inertial body 40.
  • the inertial force in the winding direction is increased.
  • the second force limiter load by the inertial body 40 can be a load adapted to at least one of the vehicle deceleration acceleration (collision severity) and the occupant's physique.
  • a predetermined number of first torques are caused by the inertia force in the pull-out direction applied to the inertia body 40.
  • the one planetary gear 72 is accelerated and revolved in the winding direction with respect to the carrier gear 76 (first sun gear 76A), and the ratchet ring 74 (first internal gear 74A) rotates from the predetermined number of first planetary gears 72 in the winding direction.
  • the meshing of the ratchet pawl 84 with the ratchet ring 74 (ratchet gear 74B) is released against the urging force, and the ratchet ring 74 is allowed to rotate in the pull-out direction. Therefore, the inertial force acting on the inertial body 40 in the pull-out direction is increased by the speed increasing mechanism 32 (a predetermined number of second planetary gears 78, carrier gears 76, a predetermined number of first planetary gears 72 and clutch gears 34) and the clutch mechanism 30. Is transmitted to the spool 14 via the.
  • first planetary gear and second planetary gear are provided.
  • three or more planetary gears may be provided.
  • the actuator 56 is operated based on the occupant's physique. However, together with or instead of this, the deceleration acceleration at the time of vehicle collision (the pulling load of the webbing 16 from the spool 14) and the pulling speed of the webbing 16 from the spool 14 by the occupant (in the pulling direction of the clutch gear 34).
  • the actuator 56 may be actuated based on at least one of the rotation speeds.
  • the inertial force in the pull-out direction applied to the inertia body 40 is restricted from being transmitted to the spool 14.
  • the inertia force in the pulling direction that is applied to the inertia body 40 when the spool 14 is decelerated and rotated in the pulling direction may be transmitted to the spool 14.
  • the clutch mechanism 30 is not operated by a selection mechanism (connection means) that is operated electrically or mechanically, for example.
  • the inertia body 40 may not be connected to the spool 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

L'invention concerne un dispositif d'enroulement de sangle dans lequel, lorsqu'une bobine est accélérée et entraînée en rotation dans la direction d'extraction au moment de la collision d'un véhicule, un embrayage unidirectionnel raccorde la bobine à un corps inertiel de sorte que le corps inertiel soit accéléré et entraîné en rotation dans la direction d'extraction. Ainsi, la force d'inertie dans la direction d'enroulement agit sur le corps inertiel, et ladite force d'inertie agit sur la bobine. Ensuite, lorsque la bobine est décélérée et entraînée en rotation dans la direction d'extraction, l'embrayage unidirectionnel ne raccorde pas la bobine au corps inertiel. Ainsi, la transmission de la force d'inertie dans la direction d'extraction agissant sur le corps inertiel à la bobine peut être supprimée.
PCT/JP2016/080740 2015-10-22 2016-10-17 Dispositif d'enroulement de sangle WO2017069094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-208219 2015-10-22
JP2015208219A JP2017081186A (ja) 2015-10-22 2015-10-22 ウェビング巻取装置

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Publication Number Publication Date
WO2017069094A1 true WO2017069094A1 (fr) 2017-04-27

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PCT/JP2016/080740 WO2017069094A1 (fr) 2015-10-22 2016-10-17 Dispositif d'enroulement de sangle

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Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2001301563A (ja) * 2000-04-24 2001-10-31 Tokai Rika Co Ltd ウエビング巻取装置
JP2009255818A (ja) * 2008-04-18 2009-11-05 Honda Motor Co Ltd 車両のシートベルト装置
JP2009255819A (ja) * 2008-04-18 2009-11-05 Honda Motor Co Ltd 車両のシートベルト装置

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Publication number Priority date Publication date Assignee Title
JPH09164911A (ja) * 1995-12-14 1997-06-24 Nippon Seiko Kk シートベルト用リトラクター
DE19950855B4 (de) * 1999-10-21 2004-03-04 Breed Automotive Technology, Inc., Lakeland Gurtaufroller für einen Sicherheitsgurt
DE19959956A1 (de) * 1999-12-13 2001-06-21 Breed Automotive Tech Gurtaufroller
JP4618659B2 (ja) * 2000-02-01 2011-01-26 タカタ株式会社 モータ式シートベルトリトラクター
JP4231185B2 (ja) * 2000-03-21 2009-02-25 株式会社東海理化電機製作所 ウェビング巻取装置
JP2001287621A (ja) * 2000-04-07 2001-10-16 Tokai Rika Co Ltd ウェビング巻取装置
JP2001354111A (ja) * 2000-06-13 2001-12-25 Tokai Rika Co Ltd ウエビング巻取装置
JP5343674B2 (ja) * 2009-04-06 2013-11-13 トヨタ自動車株式会社 シートベルト装置
JP5557935B2 (ja) * 2013-02-13 2014-07-23 本田技研工業株式会社 車両のシートベルト装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001301563A (ja) * 2000-04-24 2001-10-31 Tokai Rika Co Ltd ウエビング巻取装置
JP2009255818A (ja) * 2008-04-18 2009-11-05 Honda Motor Co Ltd 車両のシートベルト装置
JP2009255819A (ja) * 2008-04-18 2009-11-05 Honda Motor Co Ltd 車両のシートベルト装置

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