CN110027502B - Seatbelt retractor and seatbelt device for a motor vehicle - Google Patents
Seatbelt retractor and seatbelt device for a motor vehicle Download PDFInfo
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- CN110027502B CN110027502B CN201910358014.3A CN201910358014A CN110027502B CN 110027502 B CN110027502 B CN 110027502B CN 201910358014 A CN201910358014 A CN 201910358014A CN 110027502 B CN110027502 B CN 110027502B
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- seatbelt retractor
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- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 230000009467 reduction Effects 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 210000000078 claw Anatomy 0.000 claims description 27
- 230000000452 restraining effect Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000000284 resting effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000003050 axon Anatomy 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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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
- B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
- B60R22/40—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement
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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
- B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
- B60R22/41—Belt retractors, e.g. reels self-locking in an emergency with additional means for preventing locking during unwinding under predetermined conditions
-
- 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
- B60R22/4671—Reels with means to tension the belt in an emergency by forced winding up characterised by spring actuators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
The present invention relates to a seatbelt retractor and a seatbelt apparatus for a motor vehicle. The seatbelt retractor includes a spindle (1), a bracket (4), a vehicle-feel device (6), a lock mechanism (100), and a restraint mechanism (200). The restraint mechanism comprises a reduction mechanism which is configured as a wobble gear mechanism and has an input element (7) which is connected in a rotationally fixed manner to the spindle, and an output element (8) which has a flange, the outer circumferential surface of which forms the working surface, the flange being configured integrally with the output element by means of an injection molding process. The suppressing mechanism includes a follower (10), a suppressing member, and a return spring (11). In a predetermined rest position of the spindle, the working surface of the output element actuates the follower such that the hold-down member is in a position to hold down the movable member. After a predetermined rotational travel of the spindle, the damping member is moved away from the position of the damping member in the unwinding direction. The safety belt retractor is simple in structure, reduced in number of parts and high in robustness.
Description
Technical Field
The present invention relates to the field of motor vehicle safety, and more particularly to a seat belt retractor for a motor vehicle and a seat belt apparatus comprising such a seat belt retractor.
Background
In motor vehicles, a seat belt device is an important component of an occupant restraint system, and particularly in the event of a traffic accident, may provide protection for the occupant from injury or to minimize injury. With the development and progress of motor vehicle technology, the desire and demand for riding comfort of motor vehicles is increasing. In particular, in terms of noise in the interior of a motor vehicle, as high a quietness as possible is desirable when the motor vehicle is running. The seatbelt retractor may have a vehicle-feel device which may include metal parts which may collide with each other due to uneven road surface when the motor vehicle is running, which causes a certain noise. Particularly when the seatbelt retractor is installed in an area close to the human ear in a motor vehicle, noise caused by the vehicle feel device is more disturbing to the occupant, which adversely affects riding comfort.
A plurality of seat belt devices are usually provided in a motor vehicle. However, not all of the seatbelt apparatuses are used at the same time. For an unused seat belt device, measures may be taken to suppress the vehicle feel means of the respective seat belt device in order to reduce or even eliminate the noise caused by the respective vehicle feel means.
Patent document CN1754724B describes a seatbelt retractor having a vehicle-feel device and a suppressing mechanism. In the motor vehicle, the restraining mechanism can restrain the vehicle-feel device when the seat belt device is not in use, so that mutual collision of parts of the vehicle-feel device can be avoided. In such a prior art seatbelt retractor, the suppressing mechanism has many parts which are to be skillfully designed so as to be capable of being assembled and fitted to each other. The seat belt retractor has a large number of parts, is complicated to assemble, and has room for improvement in robustness.
Disclosure of Invention
The object of the invention is to provide a seat belt retractor for a motor vehicle and a seat belt device comprising such a seat belt retractor, wherein the seat belt retractor has a simpler structure and a lower number of parts and is assembly-friendly while enabling noise reduction.
According to a first aspect of the invention, a seatbelt retractor for a motor vehicle is proposed, comprising:
a bracket;
a spindle rotatably supported in the bracket and biased in a winding direction;
A locking mechanism configured to lock the spindle in an unwinding direction in an activated state and release the spindle in a deactivated state;
A vehicle sensing device configured to sense a safety-related operating condition of a motor vehicle, the vehicle sensing device having a movable component; and
A dampening mechanism comprising a speed reduction mechanism having an input element and an output element, the input element being non-rotatably connected with the spindle;
The reduction gear is configured as a wobble gear mechanism comprising an eccentric wheel as an input element, which is connected to the spindle in a rotationally fixed manner, a wobble gear as an output element, which is mounted eccentrically to the axis of rotation of the spindle by means of the eccentric wheel and which meshes with the ring gear, and a stationary ring gear, the output element having an integrated flange, the outer circumferential surface of which forms a working surface, the flange being configured integrally with the output element by means of an injection molding method;
The dampening mechanism includes a follower operable by the working surface of the output member, a dampening member movably coupled to the follower, and a return spring biasing the follower in a direction causing the dampening member to release the movable member;
Wherein in a predetermined rest position of the spindle, the working surface of the output element manipulates the follower such that the dampening member is in a position to dampen the movable member;
Wherein, in the unwinding direction, the restraining member is moved away from the position restraining the movable member after a predetermined rotational stroke of the spindle from the rest position.
In the seatbelt retractor according to the present invention, for example, compared with the aforementioned prior art, a separate cam plate can be omitted, so that it is also possible to make other components of the suppressing mechanism for suppressing the feel function of the feel device simpler, and the assembling operation related to the suppressing mechanism can be more friendly, so that the robustness of the seatbelt retractor in operation is also improved.
Some vehicle feel devices and locking mechanisms for seat belt retractors are known in the prior art. The related art can be referred to, for example, in patent documents EP2621767B1 and CN104755331a and the aforementioned patent document CN1754724B.
The vehicle sensing device may, for example, sense any one or more of the following operating parameters of the motor vehicle: longitudinal acceleration, longitudinal deceleration, pitch angle, roll angle, centrifugal acceleration, yaw rate of the motor vehicle, or a plurality of operating parameters can be sensed in combination, for example a combined acceleration of the motor vehicle can be sensed.
The movable part of the vehicle sensing device may comprise, for example, a sensing steel ball capable of rolling in a pocket, or a roller capable of rolling in a raceway, or a slider capable of sliding on a sliding surface, or a swinging element having a predetermined inertia, or the like.
According to the invention, the output element may have an integrated flange, the outer circumferential surface of which forms the working surface. In other embodiments, the working surface may be formed by an arcuate planar element integral with the output element. The flange may be formed integrally with the output element, for example by injection molding.
In some embodiments, the follower disengages from the working surface of the output member after a predetermined rotational travel of the spindle in an unwinding direction.
In some embodiments, after a predetermined rotational travel of the spindle, the follower can continue to rest on the working surface of the output element, in the unwinding direction, in which case the corresponding section of the working surface presses the follower to a reduced extent, so that the restraining part is moved out of the position of restraining the movable part.
In the installed state of the belt retractor in the motor vehicle, the spindle can have a rest position in which the belt device with the belt retractor and the webbing is unused.
According to the invention, the reduction gear may be embodied as a wobble gear, which comprises an eccentric wheel as an input element, which is connected to the spindle in a rotationally fixed manner, a wobble gear as an output element, which is supported eccentrically to the axis of rotation of the spindle by means of the eccentric wheel, and a stationary ring gear, with which the wobble gear meshes.
In other embodiments, the reduction mechanism may be configured as a spur gear mechanism or a planetary gear mechanism.
In some embodiments, the dampening mechanism may have a trigger disc, which may have a recess, which is rotatably supported, and which can be rotated against resistance. The resistance force may be, for example, a friction force, a spring force, or an electromagnetic force.
In some embodiments, the output element may have a drive projection which protrudes into the recess and is freely movable between the two ends of the recess.
In some embodiments, the drive projection may be configured as a drive pin.
In some embodiments, the driving projection may be provided on an axial end face of the flange.
In some embodiments, the trigger plate may have a working surface, and the working surface of the trigger plate may be configured to support the follower when the follower is disengaged from the working surface of the output member.
In some embodiments, the follower may have a first stop element, the working surface of the trigger disc may have a recess, and the working surface of the trigger disc and the first stop element may be configured to:
-the follower is supported on the working surface of the trigger disc outside the recess after a predetermined rotational travel of the spindle and before a predetermined maximum unreeled position of the spindle in an unreeled direction, the first stop element being inactive; and is combined with
And is also provided with
In the maximum unwinding position of the spindle, the follower is supported in the recess,
The first stop element causes activation of the locking mechanism.
In some embodiments, the first stop element may be configured as a detent.
In some embodiments, the follower may be configured as a pivotally supported follower. In other embodiments, the follower may be configured as a linearly movable follower.
In some embodiments, the follower may have a support arm configured for resting on a working surface of the output element.
In some embodiments, in a predetermined rest position of the spindle, the support arm rests on the working surface of the output element in a region adjacent to the front end of the working surface of the output element in the unwinding direction. Thus, the working surface can be compactly designed.
In some embodiments, the follower may have a support arm configured for resting on a working surface of the output element and for resting on a working surface of the trigger disc.
In other embodiments, the follower may have two support arms, one of which is configured for resting on the working surface of the output element and the other of which is configured for resting on the working surface of the trigger disc.
In some embodiments, the dampening member may be an integral resilient component of the follower, or the dampening member may be configured as a cantilevered portion of the return spring.
In some embodiments, the seatbelt retractor may have a side cover fixed to the bracket.
In some embodiments, the side cover may have a bottom surface and a protrusion extending from the bottom surface, the input element being rotatably supported on the protrusion.
In some embodiments, the input element may have a first snap element and the protrusion may have a second snap element, the first and second snap elements forming a snap connection such that the input element and the protrusion are fixed to each other in an axial direction.
In some embodiments, the input element may have a flange face, and the output element is supported on the flange face of the input element in the axial direction.
In some embodiments, the trigger plate is rotatably supported on the protrusion.
In some embodiments, the trigger disc may be pressed against the bottom surface such that the trigger disc can rotate relative to the bottom surface against a frictional force.
In some embodiments, the trigger plate may be pressed against the bottom surface by a plurality of leaves. In other embodiments, the trigger disc may be pressed against the bottom surface by a spring collar. In other embodiments, the trigger plate may be pressed against the friction element on the outer circumference, whereby friction forces can be generated between the trigger plate and the friction element.
In some embodiments, the output element presses the trigger disc against the bottom surface by means of a flange surface of the input element and the snap connection.
In some embodiments, the protrusion may have a first shaft section spaced from the bottom surface and a second shaft section adjacent to the bottom surface, the trigger disc rotatably sleeved on the second shaft section, the first snap element surrounding the first shaft section, the second snap element disposed on an end of the protrusion.
In some embodiments, the ring gear may be connected rotationally fixed to the side cover, for example, both may be integrally molded by injection molding.
In the sense of the present invention, "two parts are connected rotationally fixed" means that they cannot rotate relative to one another about a rotational axis and that they can be movable relative to one another along the rotational axis or cannot be moved relative to one another. "two components are non-rotatably connected" may include, but is not limited to: the two parts are integrally formed with each other; the gear is sleeved on a shaft with a non-circular cross section and can move on the shaft; the two parts are fixedly connected. Here, "two parts are connected rotationally fixed" shall include the following: due to manufacturing errors or unintentional play, the two parts can rotate slightly relative to each other.
In the sense of the present invention, "two components are rotatably connected" means that they can rotate relative to each other about a rotation axis.
In some embodiments, the seatbelt retractor may have a combination of the following technical features:
The reduction gear is designed as a wobble gear mechanism, which comprises an eccentric wheel as an input element, which is connected to the spindle in a rotationally fixed manner, a wobble gear and a ring gear as an output element, which is supported eccentrically to the axis of rotation of the spindle by means of the eccentric wheel and which meshes with the ring gear, the wobble gear having an integrated fan-shaped flange, the outer circumferential surface of which forms the running surface, the wobble gear having a transmission projection, the eccentric wheel having a first snap-in element, the eccentric wheel having a flange surface, the wobble gear being supported in the axial direction on the flange surface of the eccentric wheel;
The restraint mechanism has a trigger plate having a recess into which the drive projection protrudes and which is freely movable between two ends of the recess, the trigger plate having a working surface which is configured for supporting the follower when the follower is disengaged from the working surface of the swing gear; and
The seat belt retractor has a side cover fixed to the bracket, the ring gear being connected to the side cover in a rotationally fixed manner, the side cover having a bottom surface and a projection extending from the bottom surface, the projection having a first shaft section spaced from the bottom surface and a second shaft section adjoining the bottom surface and a second catch element provided on an end of the projection;
wherein the trigger disc is rotatably sleeved on the second shaft section, and the first buckle element surrounds the first shaft section;
The first and second snap elements form a snap connection such that the eccentric and the projection are fixed to each other in the axial direction, and the oscillating gear presses the trigger disc against the bottom surface by means of the flange surface of the eccentric and the snap connection such that the trigger disc can be rotated relative to the bottom surface against a friction force.
In some embodiments, the maximum unwinding position may be a spindle position, in which the length of webbing pulled out in the installed state of the seat belt retractor in the motor vehicle is greater than or equal to the length of webbing pulled out in the prescribed wearing state of the seat belt device. This can be particularly advantageous in the case of a child seat arranged in the motor vehicle, wherein an automatic locking of the webbing in the pull-out direction can be achieved in the case of restraint of a child sitting on the child seat.
In the seat belt device having such a seat belt retractor, the vehicle feel function of the vehicle feel device is suppressed by the suppressing mechanism in an unused state in the motor vehicle, so noise reduction can be achieved. The vehicle sensing device can restore the vehicle sensing function when the seat belt device is worn, and thus can desirably provide the vehicle sensing function.
In some embodiments, the vehicle feel device may include a base, a sensing element movable in the base, the sensing element being movable in the base to occupy a stationary home position and movable in response to a motor vehicle operating condition, and a second stop element movably supported in the base, the second stop element being movable to occupy a stationary home position and being liftable by the sensing element, the second stop element being configured to cause activation of the locking mechanism upon lifting from its stationary position to a predetermined position. In some embodiments, the second stop element of the vehicle sensing device may be configured as a detent.
In some embodiments, the sensing element may be configured as a sensing ball and the base may have a recess in which the sensing ball is capable of rolling in response to an operational state of the motor vehicle.
In some embodiments, the second stop element of the vehicle sensing device may be configured as a claw element. In some embodiments, the jaw element is pivotally supported in the base. In some embodiments, the claw element may cover the recess and the sensing steel ball received in the recess. In other embodiments, the second stop element of the vehicle-feel device may be configured as a linearly movable stop element.
In some embodiments, the locking mechanism may include a trigger locking mechanism having a small working load and thus may be less strongly designed, and a main locking mechanism having a large working load and thus may need to be more strongly designed.
In some embodiments, the locking mechanism may comprise a locking disc, the stopping of which can cause locking of the spindle in the unwinding direction.
In some embodiments, the seatbelt retractor may have a combination of the following technical features:
the locking mechanism includes a locking claw having a locking groove with a radially inner end and a radially outer end, the locking claw being guided by the locking groove and biased in a direction toward the radially inner end of the locking groove;
The bracket is provided with a tooth part;
the mandrel has a void that receives the locking pawl;
Wherein the locking claw is engageable with the tooth when moving in the direction of the radially outer end of the locking groove, such that the locking claw is stopped and thus the spindle is locked in the unwinding direction.
According to a second aspect of the invention, a seat belt device for a motor vehicle is proposed, comprising a webbing and a seat belt retractor for a motor vehicle according to the first aspect of the invention, wherein the spindle of the seat belt retractor is a spool of the webbing.
It should be noted here that the technical features mentioned above and those to be mentioned below may be arbitrarily combined with each other as long as they are not contradictory. All technical combinations of features which are technically feasible are technical matters explicitly included in the present application.
Drawings
The invention is described in more detail below with reference to the drawings by means of specific embodiments. The schematic drawings are briefly described as follows:
FIG. 1 is an exploded view of a seatbelt retractor according to one embodiment of the present invention;
fig. 2 is a partially omitted view of a side cover of the seatbelt retractor of fig. 1, viewed in an axial direction;
FIG. 3 is a partially omitted longitudinal section of the various components of the seatbelt retractor of FIG. 1 in an assembled state; and
Fig. 4 to 9 are schematic views of the restraint mechanism of the seatbelt retractor according to fig. 1, viewed in the axial direction, in different states.
Detailed Description
A seatbelt retractor according to an embodiment of the present invention will be described with reference to fig. 1 to 3. In fig. 1, the webbing 12 is schematically indicated by a broken line, and the mandrel 1 is rotatably supported in the holder 4. An end cap 13 for receiving a coil spring that biases the spool 1 in a winding direction so that the webbing 12 is wound on the spool 1 without an external pulling force, in which case the webbing 12 is pulled out from the spool 1 against the spring force of the coil spring, may be fixed to one end face of the bracket 4.
The seatbelt retractor has a locking mechanism 100. The spindle 1 has a recess 1.1 which accommodates a locking claw 3. The carrier 4 has teeth 4.1. The locking claw 3 can co-act with the tooth 4.1. The recess 1.1, the tooth 4.1, the locking pawl 3 and the locking disk 2 to be described are part of the locking mechanism 100. The locking disk 2 has a locking groove 2.1, the locking groove 2.1 having a radially inner end and a radially outer end. The locking claw 3 is inserted with the pin element 3.1 into the locking groove 2.1 and is thus guided by the locking groove 2.1. The locking claw 3 is biased in the direction towards the radially inner end of the locking groove by a spring element, not shown. The locking disc 2 is rotatably sleeved on the axon of the mandrel 1. In the case of an unlatching of the latching disk 2, the latching claw 3 is in a radially inner position and is disengaged from the toothing 4.1, the spindle 1 being able to rotate together with the latching disk 2 via the latching claw 3. In the case of the locking disc 2 being locked, if the spindle 1 is rotated in the unwinding direction, the locking claw 3 is forced to move in the direction towards the radially outer end of the locking groove 2.1 until the locking claw 3 engages with the tooth 4.1, whereupon the locking claw 3 is locked together with the spindle 1. With the locking disk 2 stopped and the locking claw 3 engaged with the tooth 4.1, if the spindle 1 is rotated in the reeling direction, the locking claw 3 is forced to move in the direction towards the radially inner end of the locking groove 2.1, whereupon the locking claw 3 is disengaged from the tooth 4.1 again, so that the rotation of the spindle 1 in the reeling direction is not restricted. The locking disk 2 may have ratchet teeth 2.2 on the circumference, or the locking disk 2 may be designed as a ratchet wheel. The stop element can engage with the ratchet teeth 2.2 and thereby cause a stop of the locking disc 2.
The seatbelt retractor has a vehicle-feel device 6 which is designed to sense a safety-relevant operating state of the motor vehicle, for example, it can be used to sense acceleration, deceleration and inclination of the motor vehicle. For example, when the deceleration of the motor vehicle reaches or exceeds a threshold value, the vehicle-feel device actuates the second stop element such that it engages with the ratchet teeth 2.2 of the locking disk 2, so that the locking function of the locking device is activated. In the embodiment shown in fig. 1, the vehicle sensing device 6 comprises a base 6.2, a sensing element 6.1 movable in the base and a second stop element 6.3 movably supported in the base. The sensor element 6.1 can take a stationary initial position in the base 6.2 and can be moved in response to the operating state of the motor vehicle. The second stop element 6.3 can take up a stationary initial position and can be lifted by the sensor element 6.1, the second stop element 6.3 being configured for causing activation of the locking mechanism 100 when lifted from its stationary position into a predetermined position. The inductive element 6.1 can be designed as an inductive steel ball, and the base 6.2 can have a recess in which the inductive steel ball can roll in response to the operating state of the motor vehicle. The second stop element 6.3 may be configured as a claw element which is pivotally supported in the base 6.2, which claw element covers the recess and the induction steel ball received in the recess. During the rolling of the induction ball, the second stop element 6.3 can be lifted in relation to the position of the rolling ball in the recess. When the second stop element 6.3 is lifted to a predetermined position, the second stop element 6.3 engages with the ratchet teeth 2.2. The second stop element 6.3 can be regarded here as both a component of the locking mechanism 100 and a component of the vehicle-feel device 6.
In an alternative embodiment, two separate parts may also be provided, one of which is a stop element belonging to the locking mechanism 100 and the other is a lifting element belonging to the vehicle feel device 6, which lifting element is capable of actuating the stop element.
The seatbelt retractor may include a side cover 5 which may be regarded as a housing member of the seatbelt retractor, and part of the parts of the seatbelt retractor may be covered and protected by the side cover 5. The side cover 5 may be fixed to the bracket 4. In the embodiment shown in fig. 1, the vehicle-sensing device 6, the locking device 100 and the restraint mechanism 200 can be covered by the side cover 5, wherein the vehicle-sensing device 6 is mounted in a section 5.5 in the side cover 5.
The seatbelt retractor has a suppressing mechanism 200 which can suppress the vehicle feel function of the vehicle feel device when necessary, achieve noise reduction, and can release the vehicle feel function of the vehicle feel device when necessary, achieve sensing of a safety-related operating state of the motor vehicle, and activate the locking function of the locking device when necessary.
The suppression mechanism 200 may include a reduction mechanism having an input element 7 and an output element 8. The reduction gear can be designed as a wobble gear, wherein the input element 7 can be designed as an eccentric and is connected to the spindle 1 in a rotationally fixed manner, the output element 8 can be designed as a wobble gear and has an integrated fan-shaped flange 8.1, the outer circumferential surface of which forms the working surface, and a stationary ring gear 5.1 can be provided in the side cover 5. The wobble gear is mounted eccentrically to the axis of rotation of the spindle 1 by means of the eccentric, and is meshed with the ring gear 5.1.
In the embodiment shown in fig. 1, the damping mechanism 200 has a trigger disc 9 with a recess 9.1, which is rotatably supported. The output element 8 has a drive projection 8.2 which protrudes into the recess 9.1 and can be moved freely between the two ends 9.3, 9.4 of the recess 9.1. The trigger plate 9 has a working surface. The active surface of the trigger disc 9 has a recess 9.2.
The dampening mechanism 200 comprises a follower 10, a dampening member 11.1 being in moving coupling with the follower 10, and a return spring 11, the return spring 11 biasing the follower 10 in a direction to move the dampening member 11.1 away from the second stop element 6.3. The follower 10 may be configured as a pivotably mounted follower. The suppressing member may be constituted as a cantilever portion of the return spring 11. The cantilever portion is movable with the follower 10. The follower 10 has a support arm 10.1 and a first stop element 10.2, which can be embodied as a pawl. When the driven part 10 rests with the support arm 10.1 on the running surface of the output element 8, the restraining means 11.1 presses the second stop element 6.3 of the vehicle sensing device 6, so that the second stop element 6.3 and the sensor element 6.1 cannot move relative to the base 6.2, whereby noise of the vehicle sensing device due to component collisions can be reduced or even eliminated. When the support arm 10.1 is disengaged from the running surface of the output element 8, the restraining means 11.1 is moved away from the second stop element 6.3 by the follower 10 under the action of the return spring 11 and thereby releases the vehicle feel function of the vehicle feel device. The support arms 10.1 of the follower 10 can rest on the running surface of the output element 8 and on the running surface of the trigger disk 9, which rest can be offset in time from one another, or can be carried out successively and continuously, or can be carried out partially overlapping.
The section 5.5 of the side cover 5 is omitted in fig. 2 and 3. As can be seen from fig. 2 and 3, the side cover 5 has a bottom surface 5.4 and a projection extending from the bottom surface. The input element 7 has a flange surface 7.2, and the output element 8 is supported in the axial direction on the flange surface 7.2 of the input element 7. The input element 7 has a first catch element 7.1 and is rotatably supported on the projection. The projection has a first shaft section 5.2 spaced from the bottom surface 5.4 and a second shaft section 5.3 adjoining the bottom surface 5.4 and a second catch element 5.2.1 provided on the end of the projection. Due to the reduced diameter of the first shaft section relative to the second shaft section, a flange surface 5.2.2 is formed on the projection. The first snap element 7.1 and the second snap element 5.2.1 form a snap connection such that the input element 7 and the projection are fixed to each other in the axial direction. The first snap element 7.1 surrounds the first shaft section 5.2. By means of the flange surface 7.2 of the input element 7 and the snap connection, the output element 8 presses the trigger disc 9 against the bottom surface 5.4, so that the trigger disc 9 can be rotated relative to the bottom surface 5.4 against friction.
The operation of the restraint mechanism 200 of the seatbelt retractor according to the present invention will be described below with reference to fig. 4 to 9.
In the operating state shown in fig. 4, the spindle 1 is in a predetermined rest position. In the installed state of the seat belt device with seat belt retractor and webbing 12 in the motor vehicle, the webbing 12 is maximally retracted onto the spindle 1 under the spring force of the coil spring of the seat belt retractor when the seat belt device is not being worn, the spindle 1 being in a predetermined rest position. In the state shown in fig. 1, the support arm 10.1 of the follower 10 rests on the running surface of the flange 8.1 of the output element 8 and is close to the front end 8.1.1 of the running surface in the unwinding direction, the transmission projection 8.2 rests against the end 9.3 of the recess 9.1, the damping element 11.1 presses against the second stop element 6.3 of the vehicle-sensing device 6, so that the vehicle-sensing device 6 is damped, whereby noise reduction can be achieved.
Starting from the state shown in fig. 4, the spindle 1 rotates in the unwinding direction, and the output member 8 rotates in the first direction D1 corresponding to the unwinding direction at a predetermined reduction ratio, to the state shown in fig. 5. Accordingly, the webbing 12 is pulled out by a certain length. The running surface of the flange 8.1 of the output element 8 continues to support the support arm 10.1 of the follower 10, the restraining means 11.1 continues to press the second stop element 6.3 of the vehicle-sensing device 6, and the support arm 10.1 of the follower 10 approaches the end 8.1.2 of the running surface of the flange 8.1 of the output element 8 lying behind in the unwinding direction or first direction.
Starting from the state shown in fig. 5, the spindle 1 continues to rotate in the unwinding direction, the output element 8 rotates in the first direction D1 with a predetermined reduction ratio, and the state shown in fig. 6 is reached in which the working surface of the flange 8.1 of the output element 8 has just left the support arm 10.1 with its end 8.1.2 and the support arm 10.1 rests against the working surface of the trigger disc 9 under the action of the return spring 11. The restraining means 11.1 is moved away from the second stop element 6.3 of the vehicle sensing device 6 by the drive of the follower 10, whereupon the vehicle sensing function of the vehicle sensing device 6 is restored.
The mandrel 1 undergoes a first stroke in the unwinding direction from the state shown in fig. 4 to the state shown in fig. 6, and the webbing 12 is pulled out by a first length corresponding to the first stroke of the mandrel 1. The trigger disc 9 remains stationary under the influence of static friction and the drive lug 8.2 moves freely in the recess 9.1.
Starting from the state shown in fig. 6, the spindle 1 continues to rotate in the unwinding direction, the output element 8 rotates in the first direction D1 with a predetermined reduction ratio, and the state shown in fig. 7 is reached, in which the support arm 10.1 continues to rest on the running surface of the trigger disc 9, the driving device 6 continues to be active, and the transmission projection 8.2 comes to rest on the end 9.4 of the recess 9.1.
Starting from the state shown in fig. 7, the spindle 1 continues to rotate in the unwinding direction, the trigger disc 9 is driven by the drive cam 8.2 in the first direction D1 until the state shown in fig. 8 is reached, in which the support arm 10.1, under the influence of the return spring 11, enters into the recess 9.2 of the working surface of the trigger disc 9, at which time the first stop element 10.2 engages with the ratchet teeth 2.2 of the locking disc 2, so that the locking device 100 is activated, so that the spindle 1 cannot continue to rotate in the unwinding direction, the spindle 1 reaches the maximum unwinding position, and the webbing 12 reaches the maximum pulled-out length. The position of the spindle 1 can correspond to a state between the state shown in fig. 4 and the state shown in fig. 8 when the seat belt device is worn as prescribed by an occupant in the motor vehicle, in particular in the case of a child seat, to the state shown in fig. 8.
Starting from the state shown in fig. 8, when the belt device is released, the spindle 1 is continuously rotated in the retraction direction by the restoring force of the coil spring, the output element 8 is rotated in a second direction D2 opposite to the first direction D1 with a predetermined reduction ratio, the transmission projection 8.2 is moved away from the end 9.4 of the recess 9.1, is free to move in the recess 9.1 until it comes to rest against the end 9.3 of the recess 9.1, and the locking disk 9 remains stationary. The drive projection 8.2 then drives the locking disk 9 in the second direction D2, so that the support arm 10.1 is disengaged from the recess 9.2. When the spindle 1 is turned in the reeling direction to the condition shown in fig. 9, the support arm 10.1 is disengaged from the working surface of the locking disc 9 and the support arm 10.1 reaches the end 8.1.2 of the working surface of the output element 8. The running surface of the flange 8.2 of the output element 8 again supports the support arm 10.1 of the follower 10, so that the restraining means 11.1 again presses against the second stop element 6.3 of the vehicle sensing device 6. The spindle 1 can be returned from the state shown in fig. 9 to the predetermined rest position shown in fig. 4 in the winding-up direction by the restoring force of the coil spring.
Finally, it should be pointed out that the description is only intended to be illustrative of the invention and does not limit the scope of the invention. Modifications may be made by those skilled in the art on the basis of the description, without departing from the scope of the invention.
Claims (23)
1. A seatbelt retractor for a motor vehicle, comprising:
A bracket (4);
A spindle (1) rotatably supported in the bracket (4) and biased in a winding direction;
a locking mechanism (100) configured for locking the spindle (1) in an unwinding direction in an activated state and releasing the spindle (1) in a deactivated state;
-a vehicle sensing device (6) configured for sensing a safety-related operating state of a motor vehicle, the vehicle sensing device having a movable part; and
-A dampening mechanism (200) comprising a reduction mechanism having an input element (7) and an output element (8), the input element being connected in a rotationally fixed manner with the spindle (1);
It is characterized in that the method comprises the steps of,
The reduction gear is designed as a wobble gear, comprising an eccentric wheel as an input element (7) connected in a rotationally fixed manner to a spindle (1), a wobble gear as an output element (8), and a stationary toothed ring (5.1), the seat belt retractor having a side cover (5) which is fastened to the support (4), the toothed ring (5.1) being connected in a rotationally fixed manner to the side cover (5), the wobble gear being mounted eccentrically to the axis of rotation of the spindle (1) by means of the eccentric wheel and the wobble gear engaging the toothed ring (5.1), the output element (8) having an integrated flange (8.1), the outer circumferential surface of which forms a working surface and which is formed integrally with the output element by means of an injection molding method;
The dampening mechanism (200) comprises a follower (10), a dampening member (11.1) being kinematically coupled to the follower (10), the follower (10) being steerable by the working surface of the output element (8), and a return spring (11), the return spring (11) biasing the follower (10) in a direction causing the dampening member (11.1) to release the moveable member;
Wherein in a predetermined rest position of the spindle (1), the working surface of the output element (8) actuates the follower (10) such that the damping member (11.1) is in a position to damp the movable member;
wherein, along the unwinding direction, after a predetermined rotational travel of the spindle (1) from the rest position, the follower is disengaged from the working surface of the output element, and the restraining member (11.1) is moved away from the position restraining the movable member under the action of the follower under the action of a return spring.
2. A seatbelt retractor for a motor vehicle according to claim 1, wherein,
The damping mechanism (200) has a trigger disc (9) which has a recess (9.1), which is rotatably supported and which can be rotated against resistance;
the output element (8) has a drive projection (8.2) which protrudes into the recess (9.1) and is freely movable between the two ends (9.3, 9.4) of the recess (9.1); and
The trigger plate (9) has a working surface which is designed to support the follower (10) when the follower (10) is disengaged from the working surface of the output element (8).
3. The seatbelt retractor for a motor vehicle according to claim 2, wherein the follower (10) has a first stop element (10.2), the active surface of the trigger disc (9) has a recess (9.2), the active surface of the trigger disc (9) and the first stop element (10.2) are configured to:
-the follower (10) is supported on the working surface of the trigger disc (9) outside the recess (9.2) after a predetermined rotational travel of the spindle (1) and before a predetermined maximum unreeling position of the spindle (1) in the unreeling direction, the first stop element (10.2) being inactive; and
-In the maximum unreeled position of the spindle (1), the follower (10) is supported in the recess (9.2), the first stop element (10.2) causing activation of the locking mechanism (100).
4. A seatbelt retractor for a motor vehicle according to claim 3, wherein the first stop element (10.2) is configured as a pawl.
5. The seatbelt retractor for a motor vehicle according to any one of claims 1 to 4, wherein the follower (10) is configured as a pivotably supported follower.
6. The seatbelt retractor for a motor vehicle according to any one of claims 1 to 4, wherein the follower (10) has a support arm (10.1) configured for resting on a working surface of the output element (8).
7. The seatbelt retractor for a motor vehicle according to any one of claims 2 to 4, wherein the follower (10) has a support arm (10.1) which is configured for resting on a working surface of the output element (8) and for resting on a working surface of the trigger disc (9).
8. A seatbelt retractor for a motor vehicle according to claim 6, wherein in a predetermined rest position of the spindle, the supporting arm (10.1) rests on the working surface of the output element (8) in a region adjacent to the front end (8.1.1) of the working surface of the output element (8) in the unwinding direction.
9. A seatbelt retractor for a motor vehicle according to any of claims 1 to 4, wherein the restraining member is an integral elastic component of the follower (10) or is constituted as a cantilever portion of the return spring (11).
10. The seatbelt retractor for a motor vehicle according to any one of claims 1 to 4, wherein the side cover (5) has a bottom surface (5.4) and a protrusion protruding from the bottom surface, the input element (7) being rotatably supported on the protrusion.
11. A seatbelt retractor for a motor vehicle according to claim 10, wherein the input element (7) has a first snap element (7.1) and the projection has a second snap element (5.2.1), the first and second snap elements forming a snap connection such that the input element (7) and the projection are fixed to each other in axial direction.
12. The seatbelt retractor for a motor vehicle according to any one of claims 1 to 4, wherein the input element (7) has a flange face (7.2), and the output element (8) is supported on the flange face (7.2) of the input element (7) in the axial direction.
13. The seatbelt retractor for a motor vehicle according to any one of claims 2 to 4, wherein the side cover (5) has a bottom surface (5.4) and a protrusion protruding from the bottom surface, on which the trigger disc (9) is rotatably supported.
14. A seatbelt retractor for a motor vehicle according to claim 13, wherein the trigger disc (9) is pressed against the bottom surface (5.4) such that the trigger disc (9) can rotate relative to the bottom surface (5.4) against friction.
15. The seatbelt retractor for a motor vehicle according to claim 14, wherein,
The input element (7) has a first snap element (7.1) and the projection has a second snap element (5.2.1), the first and second snap elements forming a snap connection such that the input element (7) and the projection are fixed to each other in an axial direction;
The input element (7) has a flange surface (7.2), and the output element (8) is supported in the axial direction on the flange surface (7.2) of the input element (7);
The output element (8) presses the trigger disk (9) against the bottom surface (5.4) by means of the flange surface (7.2) of the input element (7) and the snap connection.
16. A seatbelt retractor for a motor vehicle according to claim 15, wherein the projection has a first shaft section (5.2) spaced from the bottom surface and a second shaft section (5.3) adjoining the bottom surface, the trigger disc (9) being rotatably fitted over the second shaft section (5.3), the first snap element (7.1) surrounding the first shaft section (5.2), the second snap element (5.2.1) being provided on an end of the projection.
17. A seatbelt retractor for a motor vehicle according to claim 1, wherein,
The integrated flange (8.1) is fan-shaped, the wobble gear has a drive projection (8.2), the eccentric has a first snap element (7.1), the eccentric has a flange face (7.2), and the wobble gear is supported on the flange face of the eccentric in the axial direction;
The damping mechanism (200) has a trigger plate (9) having a recess (9.1), the drive projection projecting into the recess (9.1) and being freely movable between the two ends (9.3, 9.4) of the recess, the trigger plate (9) having a working surface which is configured for supporting the follower (10) when the follower (10) is disengaged from the working surface of the wobble gear; and
The side cover (5) has a bottom surface (5.4) and a projection extending from the bottom surface, the projection having a first shaft section (5.2) spaced from the bottom surface and a second shaft section (5.3) adjoining the bottom surface and a second catch element (5.2.1) provided on an end of the projection;
wherein the trigger disc (9) is rotatably mounted on the second shaft section (5.3), and the first fastening element (7.1) surrounds the first shaft section (5.2);
Wherein the first snap element (7.1) and the second snap element (5.2.1) form a snap connection such that the eccentric and the projection are fixed to each other in the axial direction, and the oscillating gear presses the trigger disc (9) against the bottom surface (5.4) by means of the flange surface (7.2) of the eccentric and the snap connection such that the trigger disc can be rotated against the bottom surface (5.4) against a friction force.
18. A seatbelt retractor for a motor vehicle according to any of claims 1-4, wherein the vehicle sensing device (6) comprises a base (6.2), a sensing element (6.1) movable in the base and a second stop element (6.3) movably supported in the base, the sensing element (6.1) being movable in the base (6.2) in a stationary initial position and in response to a motor vehicle operating condition, the second stop element (6.3) being movable in a stationary initial position and being liftable by the sensing element (6.1), the second stop element (6.3) being configured for, upon lifting from its stationary position to a predetermined position, causing activation of the locking mechanism (100).
19. The seatbelt retractor for a motor vehicle according to claim 18, wherein the induction element (6.1) is configured as an induction steel ball, the base (6.2) having a recess in which the induction steel ball can roll in response to a motor vehicle operating state.
20. A seatbelt retractor for a motor vehicle according to claim 19, wherein the second stop element (6.3) is constructed as a claw element which is pivotably supported in the base (6.2), the claw element covering the recess and the induction steel ball received therein.
21. A seatbelt retractor for a motor vehicle according to any of claims 1-4, wherein the locking mechanism (100) comprises a locking disc (2) the stop of which can cause locking of the spindle (1) in the unwinding direction.
22. The seatbelt retractor for a motor vehicle according to claim 21, wherein,
The locking mechanism (100) comprises a locking claw (3), the locking disc (2) has a locking groove (2.1), the locking groove (2.1) has a radially inner end and a radially outer end, the locking claw (3) is guided by the locking groove (2.1) and is biased in a direction towards the radially inner end of the locking groove;
the bracket (4) is provided with a tooth part (4.1);
the spindle (1) has a recess (1.1) which accommodates the locking claw (3);
Wherein the locking claw (3) can engage with the tooth (4.1) when moving in the direction of the radially outer end of the locking groove, so that the locking claw (3) is locked and thus the spindle (1) is locked in the unwinding direction.
23. A seat belt device for a motor vehicle, comprising a webbing, characterized in that the seat belt device comprises a seat belt retractor for a motor vehicle according to any one of claims 1 to 22, wherein the spindle (1) of the seat belt retractor is a spool of the webbing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358014.3A CN110027502B (en) | 2019-04-30 | 2019-04-30 | Seatbelt retractor and seatbelt device for a motor vehicle |
| PCT/CN2020/082446 WO2020220911A1 (en) | 2019-04-30 | 2020-03-31 | Seat belt retractor and seat belt apparatus for power-driven vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358014.3A CN110027502B (en) | 2019-04-30 | 2019-04-30 | Seatbelt retractor and seatbelt device for a motor vehicle |
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| CN110027502A CN110027502A (en) | 2019-07-19 |
| CN110027502B true CN110027502B (en) | 2024-06-18 |
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| CN201910358014.3A Active CN110027502B (en) | 2019-04-30 | 2019-04-30 | Seatbelt retractor and seatbelt device for a motor vehicle |
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| CN (1) | CN110027502B (en) |
| WO (1) | WO2020220911A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110027502B (en) * | 2019-04-30 | 2024-06-18 | 延锋汽车智能安全系统有限责任公司 | Seatbelt retractor and seatbelt device for a motor vehicle |
| CN110775015A (en) * | 2019-11-05 | 2020-02-11 | 安徽江淮汽车集团股份有限公司 | Safety belt retractor |
| CN111688630A (en) * | 2020-07-16 | 2020-09-22 | 延锋汽车智能安全系统有限责任公司 | Angle modulation disc assembly for safety belt retractor and safety belt retractor |
| CN215204794U (en) | 2021-06-11 | 2021-12-17 | 延锋国际座椅系统有限公司 | Control assembly for safety belt retractor and automobile seat |
| CN115384445B (en) * | 2022-09-02 | 2023-11-21 | 浙江极氪智能科技有限公司 | Seat belt and vehicle |
| CN118025066A (en) * | 2022-11-02 | 2024-05-14 | 延锋汽车智能安全系统有限责任公司 | Electronic car feel type safety belt retractor assembly |
| CN118700969A (en) * | 2024-08-29 | 2024-09-27 | 浙江松原汽车安全系统股份有限公司 | Safety belt retractor, automobile seat and automobile |
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| CN1754724A (en) * | 2004-09-14 | 2006-04-05 | 关键安全体系股份有限公司 | Seat belt retractor |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020220911A1 (en) | 2020-11-05 |
| CN110027502A (en) | 2019-07-19 |
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