CN104760567A - Safety belt winding device - Google Patents
Safety belt winding device Download PDFInfo
- Publication number
- CN104760567A CN104760567A CN201410003405.0A CN201410003405A CN104760567A CN 104760567 A CN104760567 A CN 104760567A CN 201410003405 A CN201410003405 A CN 201410003405A CN 104760567 A CN104760567 A CN 104760567A
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- CN
- China
- Prior art keywords
- rotor
- gear
- wireline reel
- slide block
- securing rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
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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
- B60R22/343—Belt retractors, e.g. reels with electrically actuated locking means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R2022/468—Reels with means to tension the belt in an emergency by forced winding up characterised by clutching means between actuator and belt reel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention provides a safety belt winding device, comprising a winding shaft, a motor and a clutch. The clutch comprises a gear, a rotor, a locking lever, a holding part, a ring and a gasket. The rotor comprises a main body portion and a flange portion which is arranged on one side of the main body portion and protrudes outwards radially. The end face of one side of the gear is in sliding contact with the flange. The ring is provided with an outer cover portion which presses the gear and elastic claws which are arranged on the inner side of the outer cover portion in the circumferential direction. The elastic claws are abutted between the gear and the rotor so as to transmit rotation of the gear to the rotor. A peripheral portion of the gasket presses the outer cover portion of the ring. The gasket is in sealing contact with the main body portion of the rotor, so that a confined space is formed among the gear, the rotor and the gasket. According to the invention, metal powder produced by the friction between the elastic claws and the rotor are sealed in the confined space, and is not spread to the whole clutch mechanism, so that the condition that transmission and the service life of the clutch are influenced by the metal powder is avoided, and therefore the service life of the clutch is prolonged.
Description
Technical field
The invention belongs to seat belt device for vehicle technical field, particularly relate to a kind of Webbing take-up device.
Background technology
Seat belt device for vehicle is the very important fender guard of in vehicle, and in the situation such as collision happens or sudden stop, seat belt device for vehicle can occupant restraint, avoids occupant to upspring from seat.And Webbing take-up device is the most important component part in seat belt device for vehicle.
Webbing take-up device carries out the folding and unfolding of ribbon by the rotation of wireline reel, thus realizes the triggering of belt restraints effect and disconnect action.
Because the occupant on vehicle is after fasten seat belts (hereinafter referred to as ribbon); ribbon be relative relaxation be attached on human body; therefore; the pull-out amount of (as the collision of forward direction occurs) ribbon during in order to reduce vehicle generation emergency; present Webbing take-up device is except possessing conventional mechanical sensing type Locking Device; usually also comprise a pretension apparatus for ribbon pretension, pre-tightening apparatus and mechanical sensing type Locking Device normally work alone.
Publication number is that the Chinese patent application of CN1894123 discloses a kind of Webbing take-up device, have employed pyrotechnic pretension apparatus in this Webbing take-up device.In case of emergency (such as there is the collision of forward direction), gas generating unit in pyrotechnic pretension apparatus is lighted, the gas push tooth bar motion produced in the cylinder, thus the gear be connected with tooth bar is rotated (rotating to ribbon coiling direction), after gear rotates, originally the inwall (annular knurl face) that the protuberance (being arranged on friction lining) in the groove be contained on gear pushes integral cartridge to is produced friction by gear, because sleeve is fixedly connected with wireline reel by limiter axle, thus, the conversion of motion of tooth bar is the rotation of wireline reel on ribbon coiling direction the most at last, and then can before mechanical sensing type Locking Device is by wireline reel locking, eliminate the lax of user's ribbon with it, which reduce the pull-out amount of ribbon, improve safety.
In addition, the Chinese patent application being CN1676380 at publication number discloses a kind of tape winding apparatus, have employed electric motor type pretension apparatus in this tape winding apparatus.In case of emergency (such as collided to being about to that forward direction occurs by detections of radar), motor (motor) rotates, and by the power-transfer clutch of a single-direction transmission mechanically between motor and wireline reel, rotation is passed to wireline reel, wireline reel is rotated to ribbon coiling direction, thus, the translating rotation of motor is the rotation of wireline reel on ribbon coiling direction the most at last, and then can before mechanical sensing type Locking Device is by wireline reel locking, eliminate the lax of user's ribbon with it, equally, the pull-out amount of ribbon can be reduced.
Tape winding apparatus disclosed in CN1676380 comprises wireline reel, motor and power-transfer clutch, wireline reel can reel and pull out the ribbon for fettering passenger that it is wound around, clutch mechanism ground is between motor and wireline reel, and the rotation of motor is passed to wireline reel, wireline reel is rotated to the coiling direction of described ribbon, cut off the transmission of the rotation that wireline reel side produces simultaneously, pass to motor with the rotation preventing wireline reel side from producing.
As shown in Figures 10 and 11, its power-transfer clutch of tape winding apparatus disclosed in CN1676380 comprises following parts:
Housing (comprising clutch-bell cover 101a and power-transfer clutch enclosing cover 102a);
Relatively described wireline reel is arranged coaxially, and transmit the rotation of described motor and the gear 116a rotated, described gear 116a has circumferential load-bearing part 120a;
The rotor 124a arranged coaxially with described gear 116a, the periphery of rotor is formed with external tooth 130a;
To be remained on housing by friction force and can a pair slide block 144a of relative rotor 124a relative movement in preset range;
Be arranged on the securing rod 154a on described rotor 124a, described securing rod 154a is always pushed to and the direction that described wireline reel is combined by a torsion spring 164a, and usually being remained on by described slide block 144a removes on position with the combination of described wireline reel, when coiling direction from described rotor 124a to ribbon rotate time, described securing rod 154a leaves described slide block 144a and moves, the state be kept described in releasing, be combined with described wireline reel under the effect of described thrust, described rotor 124a is passed to described wireline reel to the rotation of the coiling direction of described band, and allow described wireline reel relatively to rotate relative to the coiling direction of described rotor to described band, when described rotor 124a rotates to the pull-out direction of described band, described securing rod 154a moves close to described slide block 144a, and described slide block 144a makes described securing rod 154a move and remain on described combination to remove on position,
Be arranged on the ring 176a of the side of the axis direction of described rotor 124a, described ring 176a has outer cap 178a and is circumferentially arranged on the elastic claw 182a between the external tooth 130a of described gear 116a and described rotor 124a, described gear 116a and described securing rod 154a remains on predetermined assembling position by described outer cap 178a, described elastic claw 182a is integrally arranged on described outer cap 178a, and described circumferential load-bearing part 120a circumferentially bears the load from described elastic claw 182a effect.When the load not exceeding predetermined value acts on described rotor 124a, elastic claw 182a engages with the external tooth 130a of described rotor 124a, the rotation of described gear 116a is passed to described rotor 124a by described elastic claw 182a, when the load exceeding predetermined value acts on described rotor 124a, described load cuts off the transmission of described gear and the rotation between rotor, and (elastic claw 182a no longer engages with the external tooth 130a of described rotor 124a, elastic claw 182a crosses external tooth 130a when rotated), described gear 116a can be dallied relatively with described rotor 124a, because described elastic claw 182a is integrally formed on described ring 176a, and then make described ring 176a remain on (only contact does not engage) on described rotor 124a by elastic force.
Connect described a pair slide block 144a and make described a pair slide block 144a keep synchronous pad 184a, pad 184a is arranged between power-transfer clutch enclosing cover 102a and ring 176a.
Above-mentioned power-transfer clutch, the external tooth 130 of ring 176a and rotor is metal material, and when the overload occurs, elastic claw 182a is relative with rotor 124a to dally, and the external tooth 130a of elastic claw 182a and rotor friction occurs and can produce a large amount of metal powders.Meanwhile, the outer cap 178a due to ring 176a fits tightly with the upper surface of rotor 124a, like this, rubs and also can produce a large amount of metal powders between the outer cap 178a of ring 176a and the upper surface of rotor 124a.
As can be seen from Figure 11, above-mentioned power-transfer clutch, although be provided with pad 184a between power-transfer clutch enclosing cover 102a and ring 176a, and pad 184a and power-transfer clutch enclosing cover 102a moving contact, but pad 184a does not have sealing function, thus the fricative metal powder of the external tooth 130a of elastic claw 182a and rotor is understood splashes and is deposited in whole power-transfer clutch.Simultaneously, because the outer cap 178a of ring 176a extends (i.e. elastic claw 182a be formed in the circumferencial direction of described outer cap 178a outside) to the inside by elastic claw 182a, thus outer cap 178a can not hide the teeth groove of the external tooth 130a of rotor, and thus between the outer cap 178a of ring 176a and the upper surface of rotor 124a, fricative metal powder also can splashes and being deposited in whole power-transfer clutch.
The metal powder be deposited in power-transfer clutch can have considerable influence to the transmission of power-transfer clutch and service life.And, slide block 144a is remained on described housing (clutch-bell cover 101a and power-transfer clutch enclosing cover 102a) by friction force, the respective friction face that metal powder enters the slide 146a of locking plate 148a and slide block 144a can damage friction face, the relative motion of slide block 144a was lost efficacy, thus causes whole power-transfer clutch disabler.
Summary of the invention
Technical matters to be solved by this invention is the defect causing whole power-transfer clutch disabler for plated metal powder easy in its power-transfer clutch of existing Webbing take-up device, provides a kind of Webbing take-up device.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
A kind of Webbing take-up device is provided, comprise wireline reel, motor and power-transfer clutch, described wireline reel can reel and pull out the ribbon for fettering passenger that it is wound around, described clutch mechanism ground is between described motor and described wireline reel, and the rotation of described motor is passed to described wireline reel, described wireline reel is rotated to the coiling direction of described ribbon, cuts off the transmission of the rotation that described wireline reel side produces simultaneously, pass to described motor to prevent described rotation;
Wherein, described power-transfer clutch comprises:
Arrange coaxially and the gear transmitting described rotating of motor and rotate relative to described wireline reel;
Arrange coaxially with described gear and be contained in the rotor inside described gear, described rotor comprises main part and is arranged on described main part side and the flange portion outstanding to radial direction, a side end face of described gear and described flange portion moving contact;
Be arranged on described epitrochanterian securing rod;
Holding member, described securing rod is remained on by described holding member usually to be removed on position with the combination of described wireline reel, when described rotor rotates around axis to the coiling direction of ribbon, described holding member makes described securing rod be combined with described wireline reel, so that the rotation of described rotor is passed to described wireline reel; When described rotor rotates around axis to ribbon pull-out direction, described holding member makes described securing rod move and remains on described combination to remove on position;
Be arranged on the ring of the side of the axis direction of described rotor, described ring has the outer cap pushing down described gear and the elastic claw be circumferentially arranged on inside described outer cap, described elastic claw is connected between described gear and described rotor so that the rotation of described gear is passed to described rotor, when the load exceeding predetermined value acts on described rotor, described load cuts off the transmission of the rotation between described gear and rotor, and described gear can be dallied relatively with described rotor.
Be arranged on the side contrary with described rotor of described ring and the pad that arranges coaxially of relative described wireline reel, the peripheral part of described pad is pressed in the outer cap of described ring, and described pad contacts hermetically with the main part of described rotor, to form a confined space between described gear, rotor and pad.
Further, the inner peripheral portion of described gear forms multiple circumferential load-bearing part along its circumferential compartment of terrain, and described circumferential load-bearing part circumferentially bears the load from described elastic claw effect.
Further, described power-transfer clutch also comprises the shell be made up of clutch-bell cover and power-transfer clutch enclosing cover.
Further, described holding member comprises and is arranged on described epitrochanterian slide block and elastic element, described slide block is kept on the housing by friction force thus can the relative movement in preset range of relatively described rotor, when coiling direction from described rotor to described ribbon rotate time, described securing rod is mobile close to described slide block, the state be kept described in releasing, is combined with described wireline reel under the thrust of described slide block; When pull-out direction from described rotor to described ribbon rotate time, described securing rod is with leaving described slide block mobile, described elastic element described securing rod is moved to and remain on combine releasing position on.
Further, described power-transfer clutch also comprises the ratchet be connected to integratedly on described wireline reel, when coiling direction from described rotor to described ribbon rotate time, described securing rod is mobile close to described slide block, the state be kept described in releasing, be combined with described ratchet under the thrust of described slide block, and described rotor is passed to described ratchet to the rotation of the coiling direction of described ribbon, allow described ratchet relatively to rotate relative to the coiling direction of described rotor to described ribbon simultaneously; When pull-out direction from described rotor to described ribbon rotate time, described securing rod is with leaving described slide block mobile, described elastic element described securing rod is moved to and remain on combine releasing position on.
Further, the side of described slide block is equipped with slide, side contrary with described slide on described slide block is provided with locking plate, the middle body of described locking plate length direction embeds in the connecting bore be formed on described slide block, the sliding surface that described clutch-bell cover is formed is pushed down at the both ends of described locking plate length direction respectively, and scheduled volume ground elastic deformation, push down described power-transfer clutch enclosing cover to make the slide of described slide block.
Further, one end in described bending of slide block direction is formed with press section, described securing rod has to the outstanding connecting strap in the side, press section of described slide block, the leading section of described connecting strap forms the ratchet corresponding with the external tooth of described ratchet, described ratchet runs through and is formed in described epitrochanterian hole portion, and can engage with the described external tooth stating ratchet.
Further, described shim clip is between described ring and described power-transfer clutch enclosing cover.
Further, the main part of described pad is axially provided with the seal groove of annular near the side of described rotor, correspondingly, described rotor axial is formed with the flange of annular towards the side of described seal groove, described flange snaps in described seal groove, to form a confined space between described gear, rotor and pad.
Further, described power-transfer clutch also comprise relative to described wireline reel arrange coaxially and with described rotor rotate and the support that rotates, described Bracket setting between described rotor and described power-transfer clutch enclosing cover, and pushes down described rotor, holding member and securing rod simultaneously.
According to Webbing take-up device of the present invention, described ring has the outer cap pushing down described gear and the elastic claw be circumferentially arranged on inside described outer cap, and described elastic claw is connected between described gear and described rotor, namely the outer cap of described ring is supported on gear, and not with rotor contact, thus, relative to prior art, when there is overload, the outer cap of described ring is not and friction rotor (namely only have between elastic claw and rotor rub produce metal powder), thus decrease the amount of the metal powder of generation, namely the metal powder diffusing to whole clutch mechanism reduces, adds somewhat to the service life of power-transfer clutch.Further, the peripheral part of pad is pressed in the outer cap of described ring, and pad contacts hermetically with the main part of rotor, and then forms a confined space between gear, rotor and pad.Between elastic claw and rotor, fricative metal powder is closed in this confined space, and can not be diffused in whole clutch mechanism, avoids the transmission of metal powder on power-transfer clutch and the impact in service life, extends the service life of power-transfer clutch.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Webbing take-up device that one embodiment of the invention provides;
Fig. 2 is the structural representation of the Webbing take-up device after the shell removing spring coiling mechanism and power-transfer clutch in Fig. 1;
Fig. 3 is the parts exploded drawings of Fig. 1;
Fig. 4 is the exploded drawings of its clutch main body part of Webbing take-up device that one embodiment of the invention provides;
Fig. 5 is another visual angle figure of Fig. 4;
Fig. 6 is that securing rod is remained on the view being combined with ratchet and removing on position by leaf spring;
Fig. 7 is the view that securing rod is combined with ratchet under the thrust of slide block;
Fig. 8 is the assembling schematic diagram of its support of Webbing take-up device that one embodiment of the invention provides;
Fig. 9 is the inner structure schematic diagram of its power-transfer clutch of Webbing take-up device that one embodiment of the invention provides;
Figure 10 is the exploded drawings of existing its clutch main body part of a kind of Webbing take-up device;
Figure 11 be existing a kind of its power-transfer clutch of Webbing take-up device inner structure schematic diagram.
Reference numeral in specification sheets is as follows:
12, framework; 14, backboard; 16, the first stay bearing plate; 18, the second stay bearing plate; 20, wireline reel; 21, attaching screw; 24, torsion bar; 44, motor; 100, power-transfer clutch; 101, clutch-bell cover; 102, power-transfer clutch enclosing cover; 104, screw; 106, manhole; 108, sliding surface; 110, lining ring support sector; 112, lining ring; 114, the base portion of power-transfer clutch; 116, gear; 118, worm-gear toothing; 120, circumferential load-bearing part; 122, rotation stopper recess; 42, spring coiling mechanism; 5, driving device; 51, contrite gear; 52, straight gear; 53, worm screw; 54, axle sleeve; 55, axle sleeve; 124, rotor; 126, the main part of rotor; 128, flange portion; 130, external tooth; 131, round tube hole; 132, accommodation section; 133, pivot shaft portion; 134, ratchet; 135, circular hole; 136, hook tooth; 137, orienting lug; 138, connecting bore; 139, flange; 140, packing ring; 142, pilot hole; 144, slide block; 145, press section; 146, slide; 148 locking plates; 150, connecting portion; 152, connecting bore; 153, pivot shaft; 154, securing rod; 155, ratchet; 156, bearing portion; 162, hole portion; 166, card column; 168, connecting strap; 170, support; 171, knock hole; 172, the main part of support; 173, circular hole; 174, breach; 175, rotary supporting part; 176, ring; 178, outer cap; 180, spline pawl; 182, elastic claw; 184, pad; 185, seal groove; 186, synchronization blocks; 187, circular hole; 188, the main part of pad; 200, confined space.
Detailed description of the invention
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Please with reference to Fig. 1 and Fig. 2, the Webbing take-up device 10 that one embodiment of the invention provides, comprise wireline reel 20, spring coiling mechanism 42, motor 44 and power-transfer clutch 100, described wireline reel 20 can reel and pull out the ribbon for fettering passenger that it is wound around, described power-transfer clutch 100 is mechanically between described motor 44 and described wireline reel, and the rotation of described motor 44 is passed to described wireline reel 20, described wireline reel 20 is rotated to the coiling direction of described ribbon, cut off the transmission of the rotation that described wireline reel 20 side produces simultaneously, described motor 44 is passed to prevent described rotation.Spring coiling mechanism 42 is arranged on the outside of described power-transfer clutch 100.Spring coiling mechanism 42 is conventional parts, is not stating herein.
As shown in Figure 2, Webbing take-up device is with framework 12, the first stay bearing plate 16 and the second stay bearing plate 18 that the backboard 14 of framework 12 by roughly tabular, the entirety of the two ends from the Width of this backboard 14 are stretched out, backboard 14 is bolted on vehicle body, thus is arranged on vehicle body by framework 12.
Can be rotatably set between the first stay bearing plate 16 of framework 12 and the second stay bearing plate 18 with the wireline reel 20 that the materials such as mold part make.Wireline reel 20 entirety becomes cydariform, and is connected and fixed the base end part of the ribbon forming bar-shape.If make wireline reel 20 rotate to the coiling direction around its axis, ribbon layeredly reels from its base end part to the peripheral part of wireline reel 20; On the other hand, if make wireline reel 20 rotate to the pull-out direction around its axis, ribbon is drawn out.
One end of wireline reel 20 runs through the second stay bearing plate 18 and outside to framework 12 is outstanding.Not shown mechanical sensing type blocking device is arranged on the side of the second stay bearing plate 18.This mechanical sensing type blocking device comprises acceleration pick-up, and the torsion bar 24 of this acceleration pick-up and the lockplate be erected between the first stay bearing plate 16 with the second stay bearing plate 18 and the axle core position that is arranged on wireline reel 20 is connected.During vehicle emergency deceleration, by means of the action of lockout mechanism, by one end of lockplate constraint torsion bar, absorb power, stop wireline reel 20 to rotate to pull-out direction simultaneously.
In addition, the other end of wireline reel 20 runs through the first stay bearing plate 16 and outside to framework 12 is outstanding.The attaching screw 21 forming hexagonal column is coaxial and formed and be connected with the other end of this wireline reel 20 integratedly.
As shown in Figures 1 to 9, in the present embodiment, described power-transfer clutch 100 comprises shell and is contained in the base portion 114 in shell, and described base portion 114 comprises the parts such as gear 116, rotor 124, securing rod 154, holding member, ring 176, support 170, pad 184, lining ring 112 and ratchet 134.
In the present embodiment, shell is made up of clutch-bell cover 101 and power-transfer clutch enclosing cover 102.This clutch-bell cover 101 forms box like by metallic material (such as aluminum alloy), and to the direction opening contrary with the first stay bearing plate 16.This power-transfer clutch enclosing cover 102 forms tabular by metallic material (such as steel or iron), and this power-transfer clutch enclosing cover 102 is arranged on the open side of clutch-bell cover 101.Above-mentioned clutch-bell cover 101 and power-transfer clutch enclosing cover 102 are fixed on the first stay bearing plate 16 by screw 104 entirety.
The middle position of clutch-bell cover 101 diapire is formed with the manhole 106 coaxial with wireline reel 20.Attaching screw 21 runs through this manhole 106.And the peripheral part of this manhole 106 is the outstanding sliding surface 108 forming ring-type to the direction contrary with the first stay bearing plate 16.And then, form lining ring support sector 110 to the direction contrary with the first stay bearing plate 16.The lining ring 112 being formed ring-type by resin material etc. is supported in this lining ring support sector 110.
In the present embodiment, gear 116 forms ring-type by resin material etc., and it arranges coaxially relative to described wireline reel 20 and transmits described rotating of motor 44 and rotate, and the peripheral part of gear 116 is formed with worm-gear toothing 118.In the inner peripheral portion of gear 116, form multiple circumferential load-bearing part 120 along its circumferential compartment of terrain.These circumferential load-bearing part 120 are corresponding with the elastic claw 182 of ring 176 described later.Further, on the end face of the side of the axis direction of gear 116, multiple rotation stopper recess 122 is formed along its circumferential compartment of terrain.These rotation stopper recess 122 are corresponding with spline pawl 180 described later.
As shown in Figures 2 and 3, driving device 5 for the rotation of motor 44 being passed to gear 116 is arranged on the inside of clutch-bell cover 101, this driving device 5 comprises contrite gear 51 on the output shaft being connected to described motor 44, the straight gear 52 that engages with described contrite gear 51, the worm screw 53 that is connected with described straight gear 52.Described gear 116 is wrom tooth wheel, and described worm screw 53 engages with the worm-gear toothing 118 of described gear 116.Described worm screw 53 is supported in clutch-bell cover 101 by the axle sleeve 54,55 be fixedly installed in clutch-bell cover 101.Certainly, contrite gear 51 also can be substituted by two finishing bevel gear cuters with the combination of straight gear 52.
Form discoid rotor 124 by (such as aluminum alloys) such as metallic materials, arrange coaxially with described gear 116 and be contained in the inner side of described gear 116.Rotor 124 comprises cylindric main part 126 and is arranged on described main part 126 side and the flange portion 128 outstanding to radial direction.The peripheral part of described main part 126 forms multiple external tooth 130 equally spacedly along its circumference, a side end face of described gear 116 and described flange portion 128 moving contact.The cross sectional shape of each external tooth 130 is trapezoidal.Each external tooth 130 is corresponding with the elastic claw of ring 176 described later.
The middle position of main part 126 diapire is formed and its accommodation section 132 coaxially and roughly cylindrically, the side of the described accommodation section 132 axis direction direction of arrow A (in Fig. 4 and Fig. 5) is equipped with the pivot shaft portion 133 of a ring-type coaxially, and the central authorities in this pivot shaft portion are formed with round tube hole 131.This pivot shaft portion 133 is rotatably formed on the circular hole 135 of power-transfer clutch enclosing cover 102 by the rotary supporting part 175 of support 170 described later.Aforesaid lining ring 112 rotatably engages with the opposite side of the axis direction of accommodation section 132 direction of arrow B (in Fig. 4 and Fig. 5), and the opposite side of the axis direction of accommodation section 132 is rotatably supported on clutch-bell cover 101 by lining ring 112.Thus, main part 126(or rotor 124) can rotate around the axis of oneself.
The ratchet 134 of the roughly ring-type formed by iron plate etc. is contained in the accommodation section 132 of this main part 126.Hook tooth 136 is formed at the peripheral part of ratchet 134.Be hexagonal connecting bore 138 at the axle core Formation cross-section of ratchet 134, under the state that aforementioned attaching screw 21 runs through, relatively its axis rotatably overall (can not relatively rotate) connect.Thus, ratchet 134 and wireline reel 20 can be rotated integratedly by attaching screw 21.
In addition, the side (the arrow B direction in Fig. 4 and Fig. 5) of ratchet 134 axis direction contacts aforementioned lining ring 112 slidably.The packing ring 140 be made up of resin material etc. is arranged on the opposite side (the arrow A direction in Fig. 4 and Fig. 5) of ratchet 134 axis direction.This packing ring 140 contacts the ring-type diapire of accommodation section 132 slidably, thus, can limit the displacement along ratchet 134 axis direction.
In addition, at the radial outside of accommodation section 132, the diapire of main part 126 forms a pair pilot hole 142 along the circumferential skewing of main part 126.Slide respectively in each pilot hole 142 to be provided with and to be made up of resin material etc. and circumferential skewing along main part 126 becomes roughly block slide block 144.Above-mentioned a pair slide block 144 is maintained by the outer peripheral face of the inner peripheral surface of main part 126 and accommodation section 132, and this slide block 144 can relative to main part 126(rotor 124 in the preset range along pilot hole 142) relative movement.
The side (the arrow A direction in Fig. 4 and Fig. 5) of each slide block 144 is equipped with slide 146, and this slide 146 contacts power-transfer clutch enclosing cover 102 as illustrated in fig. 9.And the side that the slide 146 of each slide block 144 is contrary is provided with locking plate 148.Locking plate 148 is bent into level and smooth > font (its middle body gently bends) by having the narrower sheetmetal of elastomeric width.The connecting portion 150 being arranged on the length direction middle body of locking plate 148 embeds the connecting bore 152 be formed on slide block 144, thus this locking plate 148 links into an integrated entity with slide block 144, simultaneously, the sliding surface 108 of aforementioned clutch housing 101 is pushed down at the both ends of the length direction of locking plate 148 respectively, and scheduled volume ground elastic deformation.
Therefore, under the effect of the elastic force of locking plate 148, the slide 146 of slide block 144 pushes down power-transfer clutch enclosing cover 102, applies predetermined friction force to slide block 144 along the movement (relative movement of relative rotor 124) of pilot hole 142.Therefore, once rotor 124 rotates, by means of the friction force at length direction both ends acting on slide 146 and locking plate 148, slide block 144 is temporarily maintained on shell (clutch-bell cover 101 and power-transfer clutch enclosing cover 102), and relative rotor 124 can relative movement in the preset range along pilot hole 142.
Press section 145 is formed in an end of each slide block 144 bending direction.Above-mentioned press section 145 is corresponding with pair of locking bar 154 respectively.
Each securing rod 154 forms mild > font by iron plate etc., and is arranged on the end side of each slide block 144 bending direction, and described securing rod 154 is always by a leaf spring 164(elastic element) push to remove direction with the combination of described ratchet 134.Each securing rod 154 comprises the bearing portion 156 of ring-type, and the both sides that this bearing portion 156 is positioned at axis direction are formed with pivot shaft 153 respectively, the diapire of main part 126 is provided with shrinkage pool (not indicating in figure).The bearing portion 156 of each securing rod 154 by the pivot shaft 153 of the side (the arrow B direction in Fig. 4 and Fig. 5) of axis direction and shrinkage pool coordinate rotatably be supported on main part 126 diapire on.Each securing rod 154 also has the outstanding and connecting strap 168 formed with described bearing portion in side, press section 145 to described slide block, and usual described connecting strap 168 is combined with described press section 145 and removes.The leading section of this connecting strap 168 forms the ratchet 155 corresponding with the external tooth 136 of aforementioned ratchet 134, and this ratchet 155 runs through the hole portion 162 be formed on the accommodation section 132 of rotor 124, and can engage with the external tooth 136 of aforementioned ratchet 134.
In addition, main part 126 diapire of rotor is also formed with orienting lug 137 and card column 166 to the side (the arrow A direction in Fig. 4 and Fig. 5) of axis direction, the pars intermedia of described leaf spring 164 is clipped between the bearing portion 156 of described securing rod and described orienting lug 137, described leaf spring 164 is against a side surface of the close described ratchet 134 of the connecting strap 168 of described securing rod near one end of described ratchet 134, the other end of described leaf spring 164 is fastened in described card column 166.Like this, described leaf spring 164 is always to extrapolation securing rod 154, and namely described securing rod 154 is always pushed to remove direction with the combination of described ratchet 134 by described leaf spring 164.
As shown in FIG. 6 and 7, rotor 124 opposing slider 144 moves, cause securing rod 154 opposing slider 144 to move and in preset range close to or away from.As shown in Figure 7, when described rotor 124 rotates around axis to the coiling direction of ribbon, described securing rod 154 moves close to described slide block 144 ground, described press section 145 is combined with described connecting strap 168, the state be kept described in releasing, under the thrust of described slide block 144, the ratchet 155 of connecting strap 168 front end engages with the external tooth 136 of ratchet 134, securing rod 154 is combined with described wireline reel 20, and then described rotor 124 is passed to described wireline reel 20 around described axis to the rotation of the coiling direction of ribbon; And, as shown in Figure 6, when described rotor 124 rotates around axis to the pull-out direction of ribbon, described securing rod 154 leaves described slide block 144 ground and moves, the ratchet 155 of connecting strap 168 front end is separated with the external tooth 136 of ratchet 134, described connecting strap 168 is combined with described press section 145 and removes, thus makes described securing rod 154 be moved in the effect of described leaf spring 164 and remain on described combination releasing position.
In the present embodiment, holding member is made up of above-mentioned slide block 144 and leaf spring 164.Certainly, in other embodiments, the leaf spring 164 of holding member also can be substituted by torsion spring.
The setting that the relatively described wireline reel 20 of support 170 is coaxial, rotates with rotor 124 and rotates.Described support 170 can be fixed as one (the present embodiment is for crimping) by crimping or bayonet fitting etc. with described rotor 124, described securing rod 154 is limited between described support 170 and described rotor 124, after described power-transfer clutch 100 has assembled, described rotor 124 and described support 170 keep described securing rod 154 to go up in any direction can not landing, when described rotor 124 rotates around axis to the coiling direction of ribbon, described support 170 and described securing rod 154 together rotate thereupon, described support 170 makes the motion process of described securing rod 154 occur in all the time in the radial direction of described power-transfer clutch 100.And, described support 170 is arranged between described rotor 124 and described power-transfer clutch enclosing cover 102, play axial support and positioning action, described support 170 is separated described rotor 124 and described power-transfer clutch enclosing cover 102, ensures the smooth and easy rotation of described rotor 124 in described power-transfer clutch 100 inside.
Support 170 is with the main part 172 of ring-type, the middle body of main part 172 is formed with circular hole 173, described circular hole 173 is run through in the pivot shaft portion 133 of rotor 124, the rotary supporting part 175 that the peritreme portion of circular hole 173 is equipped with to the side (power-transfer clutch enclosing cover 102 side) contrary with rotor 124, the pivot shaft portion 133 of rotor 124 is rotatably supported in the circular hole 135 of power-transfer clutch enclosing cover 102 by this rotary supporting part 175.
In addition, the peripheral part of main part 172 offers a pair breach 174, and the slide 146 of slide block 144 runs through this breach 174.
In addition, main part 172 is provided with knock hole 171, described knock hole 171 coordinates with pivot shaft 153 grafting of the opposite side (the arrow A direction in Fig. 4 and Fig. 5) of bearing portion 156 axis direction of each securing rod 154, to ensure the axial location of securing rod 154.Further, as shown in Figure 8, main part 172 pushes down rotor 124, leaf spring 164, slide block 144 and securing rod 154 simultaneously, to realize the axial limiting of rotor 124, leaf spring 164, slide block 144 and securing rod 154.
Be arranged on the radial outside of support 170 by having ring 176 that elastomeric metallic material (such as SUS etc.) makes and be arranged in the side (the arrow A direction of Fig. 4 and Fig. 5) of the axis direction of rotor 124.Described ring 176 have push down described gear 116 outer cap 178, be circumferentially arranged on elastic claw 182 inside described outer cap 178 and integrally formed and the multiple spline pawls 180 outstanding to its radially inner side in the inner peripheral portion of outer cap 178.These spline pawls 180 engage with the rotation stopper recess 122 of aforesaid gears 116.Thus, ring 176 opposed gear 116 connects in its circumferential direction integratedly.
Multiple elastic claws 182 compartment of terrain with elastomeric tabular is integrally provided in the inner peripheral portion of outer cap 178.The base end part of each elastic claw 182 and outer cap 178 integrated connection.The pars intermedia of the length direction of each elastic claw 182 bends to the radially inner side of outer cap 178, and its leading section bends to the radial outside of outer cap 178, and each elastic claw 182 entirety is along the circumferential skewing of outer cap 178.
As shown in FIG. 6 and 7, between the external tooth 130 and the inner peripheral surface of gear 116 of rotor 124, the circumference along rotor 124 and gear 116 arranges these elastic claws 182, and the external tooth 130 of rotor 124 is pushed in its inboard portion by the elastic force of himself.Thus, ring 176 entirety remains on rotor 124.
The Outboard Sections of each elastic claw 182 is connected with the inner peripheral surface of gear 116 respectively, and gear 116 is supported on rotor 124 by each elastic claw 182.In this case, the outer cap 178 of ring 176 and the flange portion 128 of rotor 124 limit the movement of gear 116 at axis direction.In this case, the main part 172 of support 170 can anti-limited slip block 144, securing rod 154 and leaf spring 164 come off from rotor 124, thus makes said structure parts remain on predetermined assembling position.
And then the leading section of each elastic claw 182 enters the wheel well of external tooth 130 respectively, a sidewall (sidewall along the radial parallel formation side of main part 126) of contact external tooth 130.The circumferential load-bearing part 120 of the base end part contact aforesaid gears 116 of each elastic claw 182.Thus, each elastic claw 182 makes gear 116 and rotor 124 relative to its circumferential integrated connection (relatively rotate and be restricted), thus when gear 116 rotates, gear 116 and rotor 124 rotate integratedly.
Now, gear 116 is delivered to the base end part of elastic claw 182 by circumferential load-bearing part 120 to the rotational force of ribbon coiling direction (the arrow C direction in Fig. 6 and Fig. 7), then be delivered to the external tooth 130 of rotor 124 from the leading section of elastic claw 182.Gear 116 circumferentially bears the load from elastic claw 182 by circumferential load-bearing part 120.That is, gear 116 bears load from elastic claw 182 along its hand of rotation.
As mentioned above, elastic claw 182 has elastomeric sheetmetal.Therefore, the elastic force (thrust) of the rotational force antagonism elastic claw 182 produced by the relative rotation of gear 116 relative rotor 124, if its size enough extracts the leading section of each elastic claw 182 from the wheel well of external tooth 130, then elastic claw 182 can remove gear 116 and the connection of rotor 124 around axis.Thus gear 116 can rotate relatively with rotor 124.
Gear 116 is delivered to the spline pawl 180 of ring 176 by rotation stopper recess 122 to the rotational force of ribbon pull-out direction (the arrow D direction in Fig. 6 and Fig. 7), then be delivered to the external tooth 130 of rotor 124 from the leading section of the elastic claw 182 of ring 176.
In addition, outer cap 178 is in the outside of multiple external tooths 130 of rotor 124 and does not contact with multiple external tooth 130, and namely outer cap 178 can not produce with multiple external tooths 130 of rotor 124 and rub, and thus, this position avoids the generation of metal powder.
The pad 184 forming ring-type by resin material etc. is arranged on the side contrary with rotor 124 of ring 176.Pad 184 is clipped between ring 176 and power-transfer clutch enclosing cover 102, and this pad 184 can not rotate around its axis relatively relative to ring 176.This pad 184 can prevent metal ring 176 from directly sliding with power-transfer clutch enclosing cover 102, and ring 176 is rotated smoothly relatively relative to power-transfer clutch enclosing cover 102.
Pad 184 comprises the main part 188 of ring-type, the central portion of main part 188 is formed with the circular hole 187 coaxial with rotor 124, the peritreme portion of described circular 187 is provided with a pair synchronization blocks 186 corresponding to a pair slide block in opposite directions, when described rotor 124 rotates around axis to the coiling direction of ribbon or pull-out direction, a pair synchronization blocks 186 on pad 184 ensures the synchronous of described a pair slide block 144.
In addition, as shown in Figure 9, the peripheral part of the main part 188 of pad 184 is pressed in the outer cap 178 of described ring 176, and pad 184 is axially provided with the seal groove 185 of annular near the side of rotor 124, correspondingly, the side (the A direction of arrow in Fig. 5 and Fig. 6) of main part 126 axis direction of described rotor is formed with the flange 139 of annular, and described flange 139 snaps in described seal groove 185.Due to the flange portion 128 of rotor and a side end face moving contact (fitting tightly) of described gear 116, like this, just between the inner peripheral surface of described gear 116, rotor 124 and pad 184, a confined space 200 is formed.
When there is overload, between the external tooth 130 of elastic claw 182 and rotor 124, fricative metal powder is just closed in described confined space 200, and can not be diffused in whole clutch mechanism, avoid the transmission of metal powder on power-transfer clutch and the impact in service life, extend the service life of power-transfer clutch.
In addition, in the embodiment that other is not shown, also can be pad is axially provided with annular flange near the side of rotor, correspondingly, the side of the main part axis direction of described rotor be formed with the seal groove of annular, and described flange snaps in described seal groove.Equally, between the inner peripheral surface of described gear, rotor and pad, a confined space is formed.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Webbing take-up device, comprise wireline reel, motor and power-transfer clutch, described wireline reel can reel and pull out the ribbon for fettering passenger that it is wound around, described clutch mechanism ground is between described motor and described wireline reel, and the rotation of described motor is passed to described wireline reel, described wireline reel is rotated to the coiling direction of described ribbon, cuts off the transmission of the rotation that described wireline reel side produces simultaneously, pass to described motor to prevent described rotation;
It is characterized in that, described power-transfer clutch comprises:
Arrange coaxially and the gear transmitting described rotating of motor and rotate relative to described wireline reel;
Arrange coaxially with described gear and be contained in the rotor inside described gear, described rotor comprises main part and is arranged on described main part side and the flange portion outstanding to radial direction, a side end face of described gear and described flange portion moving contact;
Be arranged on described epitrochanterian securing rod;
Holding member, described securing rod is remained on by described holding member usually to be removed on position with the combination of described wireline reel, when described rotor rotates around axis to the coiling direction of ribbon, described holding member makes described securing rod be combined with described wireline reel, so that the rotation of described rotor is passed to described wireline reel; When described rotor rotates around axis to ribbon pull-out direction, described holding member makes described securing rod move and remains on described combination to remove on position;
Be arranged on the ring of the side of the axis direction of described rotor, described ring has the outer cap pushing down described gear and the elastic claw be circumferentially arranged on inside described outer cap, described elastic claw is connected between described gear and described rotor so that the rotation of described gear is passed to described rotor, when the load exceeding predetermined value acts on described rotor, described load cuts off the transmission of the rotation between described gear and rotor, and described gear can be dallied relatively with described rotor;
Be arranged on the side contrary with described rotor of described ring and the pad that arranges coaxially of relative described wireline reel, the peripheral part of described pad is pressed in the outer cap of described ring, and described pad contacts hermetically with the main part of described rotor, to form a confined space between described gear, rotor and pad.
2. Webbing take-up device according to claim 1, is characterized in that, the inner peripheral portion of described gear forms multiple circumferential load-bearing part along its circumferential compartment of terrain, and described circumferential load-bearing part circumferentially bears the load from described elastic claw effect.
3. Webbing take-up device according to claim 1, is characterized in that, described power-transfer clutch also comprises the shell be made up of clutch-bell cover and power-transfer clutch enclosing cover.
4. Webbing take-up device according to claim 3, it is characterized in that, described holding member comprises and is arranged on described epitrochanterian slide block and elastic element, when coiling direction from described rotor to described ribbon rotate time, described securing rod is mobile close to described slide block, the state be kept described in releasing, is combined with described wireline reel under the thrust of described slide block; When pull-out direction from described rotor to described ribbon rotate time, described securing rod is with leaving described slide block mobile, described elastic element described securing rod is moved to and remain on combine releasing position on.
5. Webbing take-up device according to claim 4, it is characterized in that, described power-transfer clutch also comprises the ratchet be connected to integratedly on described wireline reel, when coiling direction from described rotor to described ribbon rotate time, described securing rod is mobile close to described slide block, the state be kept described in releasing, be combined with described ratchet under the thrust of described slide block, and described rotor is passed to described ratchet to the rotation of the coiling direction of described ribbon, allow described ratchet relatively to rotate relative to the coiling direction of described rotor to described ribbon simultaneously; When pull-out direction from described rotor to described ribbon rotate time, described securing rod is with leaving described slide block mobile, described elastic element described securing rod is moved to and remain on combine releasing position on.
6. Webbing take-up device according to claim 3, it is characterized in that, the side of described slide block is equipped with slide, side contrary with described slide on described slide block is provided with locking plate, the middle body of described locking plate length direction embeds in the connecting bore be formed on described slide block, the sliding surface that described clutch-bell cover is formed is pushed down at the both ends of described locking plate length direction respectively, and scheduled volume ground elastic deformation, push down described power-transfer clutch enclosing cover to make the slide of described slide block.
7. Webbing take-up device according to claim 6, it is characterized in that, one end in described bending of slide block direction is formed with press section, described securing rod has to the outstanding connecting strap in the side, press section of described slide block, the leading section of described connecting strap forms the ratchet corresponding with the external tooth of described ratchet, described ratchet runs through and is formed in described epitrochanterian hole portion, and can engage with the described external tooth stating ratchet.
8. Webbing take-up device according to claim 3, is characterized in that, described shim clip is between described ring and described power-transfer clutch enclosing cover.
9. Webbing take-up device according to claim 1, it is characterized in that, the main part of described pad is axially provided with the seal groove of annular near the side of described rotor, correspondingly, described rotor axial is formed with the flange of annular towards the side of described seal groove, described flange snaps in described seal groove, to form a confined space between described gear, rotor and pad.
10. the Webbing take-up device according to claim 3 to 9 any one, it is characterized in that, described power-transfer clutch also comprise relative to described wireline reel arrange coaxially and with described rotor rotate and the support that rotates, described Bracket setting between described rotor and described power-transfer clutch enclosing cover, and pushes down described rotor, holding member and securing rod simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003405.0A CN104760567B (en) | 2014-01-06 | 2014-01-06 | Safety belt winding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003405.0A CN104760567B (en) | 2014-01-06 | 2014-01-06 | Safety belt winding device |
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| Publication Number | Publication Date |
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| CN104760567A true CN104760567A (en) | 2015-07-08 |
| CN104760567B CN104760567B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410003405.0A Active CN104760567B (en) | 2014-01-06 | 2014-01-06 | Safety belt winding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107444335A (en) * | 2016-05-26 | 2017-12-08 | 株式会社东海理化电机制作所 | Belt-strap coiling control device |
| WO2021164420A1 (en) * | 2020-02-21 | 2021-08-26 | 奥托立夫开发公司 | Clutch device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695741A (en) * | 1979-12-21 | 1981-08-03 | Fuji Kiko Co Ltd | Seat belt retractor |
| JPS56124532A (en) * | 1980-03-07 | 1981-09-30 | Takata Kk | Seat belt retractor with memory |
| CN1676379A (en) * | 2004-04-01 | 2005-10-05 | 株式会社东海理化电机制作所 | Webbing take-up device |
| JP2006282097A (en) * | 2005-04-04 | 2006-10-19 | Ashimori Ind Co Ltd | Retractor for seat belt |
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2014
- 2014-01-06 CN CN201410003405.0A patent/CN104760567B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695741A (en) * | 1979-12-21 | 1981-08-03 | Fuji Kiko Co Ltd | Seat belt retractor |
| JPS56124532A (en) * | 1980-03-07 | 1981-09-30 | Takata Kk | Seat belt retractor with memory |
| CN1676379A (en) * | 2004-04-01 | 2005-10-05 | 株式会社东海理化电机制作所 | Webbing take-up device |
| JP2006282097A (en) * | 2005-04-04 | 2006-10-19 | Ashimori Ind Co Ltd | Retractor for seat belt |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107444335A (en) * | 2016-05-26 | 2017-12-08 | 株式会社东海理化电机制作所 | Belt-strap coiling control device |
| CN107444335B (en) * | 2016-05-26 | 2021-06-11 | 株式会社东海理化电机制作所 | Webbing take-up control device for seat belt |
| WO2021164420A1 (en) * | 2020-02-21 | 2021-08-26 | 奥托立夫开发公司 | Clutch device |
| US11933372B2 (en) | 2020-02-21 | 2024-03-19 | Autoliv Development Ab | Clutch device |
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|---|---|
| CN104760567B (en) | 2017-02-08 |
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