CN203739833U - Safety belt coiler device - Google Patents
Safety belt coiler device Download PDFInfo
- Publication number
- CN203739833U CN203739833U CN201420004915.5U CN201420004915U CN203739833U CN 203739833 U CN203739833 U CN 203739833U CN 201420004915 U CN201420004915 U CN 201420004915U CN 203739833 U CN203739833 U CN 203739833U
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- Prior art keywords
- rotor
- securing rod
- wireline reel
- slide block
- gear
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- Expired - Lifetime
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- Mechanical Operated Clutches (AREA)
Abstract
The utility model provides a safety belt coiler device. The safety belt coiler device comprises a coiling shaft, a motor and a clutch. A mesh belt used for tightening a passenger can be coiled on and pulled out of the coiling shaft, the clutch is mechanically arranged between the motor and the coiling shaft, and rotation of the motor can be transmitted to the coiling shaft so as to enable the coiling shaft to rotate toward the coiling direction of the mesh belt. Meanwhile, rotation transmission generated beside the coiling shaft can be cut off so as to prevent rotation from transmitting to the motor. The clutch comprises a gear, a rotor, a locking rod and a retaining part, and the locking rod is always pushed to the combination relieving direction of the coiling shaft by the retaining part. The locking rod is always pushed to the combination relieving direction of the coiling shaft by the retaining part, so that a slider is free of stress generally but is stressed only when the gear and the rotor integrally rotate, and the slider is less prone to deform or break, and service life of the clutch is prolonged to some extent.
Description
Technical field
The utility model belongs to seat belt device for vehicle technical field, particularly relates to a kind of Webbing take-up device.
Background technology
Seat belt device for vehicle is a very important fender guard 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, thereby realizes the triggering of safety strap effect of contraction and disconnect action.
Because the occupant on vehicle is fastening seat belts after (hereinafter referred to as ribbon); ribbon is being attached on human body of relatively relaxing; therefore; the pull-out amount of (as the collision of forward direction occurs) ribbon when reducing vehicle generation emergency; present Webbing take-up device is except possessing conventional mechanical sensing type Locking Device; conventionally 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, has adopted pyrotechnic pretension apparatus in this Webbing take-up device.In case of emergency (for example there is the collision of forward direction), gas generating unit in pyrotechnic pretension apparatus is lighted, the gas push tooth bar motion producing in cylinder, thereby make the gear rotation (to the rotation of ribbon coiling direction) being connected with tooth bar, after gear rotation, the inwall (annular knurl face) that is originally contained in protuberance (being arranged on friction lining) in the groove on gear and pushes to integral type sleeve is produced friction by gear, because sleeve is fixedly connected with wireline reel by limiter axle, thereby, the conversion of motion of tooth bar is the rotation of wireline reel on ribbon coiling direction the most at last, and then can be before mechanical sensing type Locking Device be by wireline reel locking, eliminate user's relaxing of ribbon with it, reduce like this pull-out amount of ribbon, improve safety.
In addition, the Chinese patent application that is CN1676380 at publication number discloses a kind of tape winding apparatus, has adopted electric motor type pretension apparatus in this tape winding apparatus.In case of emergency (for example arrive and be about to occur forward direction collision by detections of radar), motor (motor) rotation, and by one mechanically the power-transfer clutch of the single-direction transmission between motor and wireline reel rotation is passed to wireline reel, wireline reel is rotated to ribbon coiling direction, thereby, the rotation of motor is converted into the rotation of wireline reel on ribbon coiling direction the most at last, and then can be before mechanical sensing type Locking Device be by wireline reel locking, eliminate user's relaxing of ribbon with it, equally, can reduce the pull-out amount of ribbon.
The disclosed tape winding apparatus of CN1676380 comprises wireline reel, motor and power-transfer clutch, wireline reel can reel and pull out on it be wound around for fettering passenger's ribbon, clutch mechanism ground is between motor and wireline reel, and the rotation of motor is passed to wireline reel, make the coiling direction rotation of wireline reel to described ribbon, cut off the transmission of the rotation that wireline reel side produces, to prevent that the rotation that wireline reel side is produced from passing to motor simultaneously.
As shown in Figures 10 and 11, its power-transfer clutch of the disclosed tape winding apparatus of CN1676380 comprises following parts:
Housing (comprising clutch-bell cover 101a and power-transfer clutch enclosing cover 102a);
Relatively described wireline reel arranges coaxially, transmits the rotation of described motor and the gear 116a that rotates, and described gear 116a has circumferential load carrying part 120a;
Rotor 124a with described gear 116a arranges coaxially, is formed with external tooth 130a in the periphery of rotor;
By a pair of slide block 144a that friction force remains on housing and rotor 124a relatively moves in preset range relatively;
Be arranged on the securing rod 154a on described rotor 124a, described securing rod 154a is always pushed to the direction of being combined with described wireline reel by a torsion spring 164a, and conventionally remained on the combination of described wireline reel and remove on position by described slide block 144a, in the time that described rotor 124a rotates to the coiling direction of ribbon, described securing rod 154a leaves described slide block 144a and moves, remove described maintained state, under the effect of described thrust, be combined with described wireline reel, 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 to the coiling direction of described band with respect to described rotor, in the time that described rotor 124a rotates to the pull-out direction of described band, described securing rod 154a approaches described slide block 144a and moves, and described slide block 144a makes described securing rod 154a move and remain on described combination releasing position,
Be arranged on the ring 176a of a side of the axis direction of described rotor 124a, described ring 176a has outer cap 178a and edge is circumferentially arranged on the elastic claw 182a between described gear 116a and the external tooth 130a of described rotor 124a, described outer cap 178a remains on described gear 116a and described securing rod 154a on predetermined assembling position, it is upper that described elastic claw 182a is integrally arranged on described outer cap 178a, and described circumferential load carrying part 120a is along circumferentially bearing the load from described elastic claw 182a effect.Acted on described rotor 124a when upper when not exceeding the load of predetermined value, 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, acted on described rotor 124a when upper when exceeding the load of predetermined value, described load cuts off the transmission of the rotation between described gear and 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 described rotor 124a upper (only contact does not engage) by elastic force.
Connect described a pair of slide block 144a and make described a pair of 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 in the time there is overload, elastic claw 182a is relative with rotor 124a to dally, and friction occurs the external tooth 130a of elastic claw 182a and rotor can produce a large amount of metal powders.Meanwhile, because the outer cap 178a of ring 176a fits tightly with the upper surface of rotor 124a, like this, between the ring outer cap 178a of 176a and the upper surface of rotor 124a, friction also can produce a large amount of metal powders.
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, thereby the fricative metal powder of external tooth 130a of elastic claw 182a and rotor can splash everywhere and be deposited in whole power-transfer clutch.Simultaneously, because the outer cap 178a of ring 176a extends (being the outside that elastic claw 182a is formed on the circumferencial direction of described outer cap 178a) to the inside by elastic claw 182a, thereby outer cap 178a can not hide the teeth groove of the external tooth 130a of rotor, thereby between the ring outer cap 178a of 176a and the upper surface of rotor 124a, fricative metal powder also can splash everywhere and be deposited in whole power-transfer clutch.
The metal powder being deposited in power-transfer clutch can and have considerable influence service life to the transmission of power-transfer clutch.And, slide block 144a is remained on described housing (clutch-bell cover 101a and power-transfer clutch enclosing cover 102a) by friction force, the friction face separately 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, thereby cause whole power-transfer clutch disabler.
In addition, in above-mentioned power-transfer clutch, described securing rod 154a is always pushed to and the bonding position of described ratchet 134a by torsion spring 164a, and the combination that securing rod 154a is remained on described ratchet 134 by described slide block 144a is conventionally removed on position.Thereby slide block 144a need to bear the predetermincd tension of torsion spring 164a conventionally, like this, in the course of time, easily make slide block 144a torsional deflection or fracture, cause whole power-transfer clutch to lose efficacy.
Utility model content
Technical problem to be solved in the utility model is conventionally need to bear the predetermincd tension of torsion spring and easily torsional deflection or fracture for the slide block in its power-transfer clutch of existing Webbing take-up device, the defect that causes whole power-transfer clutch to lose efficacy, provides a kind of Webbing take-up device.
It is as follows that the utility model 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 on it be wound around for fettering passenger's ribbon, described clutch mechanism ground is between described motor and described wireline reel, and the rotation of described motor is passed to described wireline reel, make the coiling direction rotation of described wireline reel to described ribbon, cut off the transmission of the rotation that described wireline reel side produces, to prevent that described rotation from passing to described motor simultaneously;
Wherein, described power-transfer clutch comprises:
Arrange coaxially and transmit rotating of described motor and the gear that rotates relative to described wireline reel;
Arrange coaxially and be contained in the rotor of described gear inner side with described gear;
Be arranged on described epitrochanterian securing rod;
Holding member, described securing rod is conventionally remained on and removes on position with the combination of described wireline reel and described securing rod is always pushed to remove direction with the combination of described wireline reel by described holding member by described holding member, in the time that the coiling direction of described rotor around axis to ribbon rotates, 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; In the time that described rotor rotates around axis to ribbon pull-out direction, described holding member makes described securing rod move and remain on described combination releasing position.
Further, described power-transfer clutch also comprises the ring of a side of the axis direction that is arranged on described rotor, described ring has pushes down the outer cap of described gear and along the elastic claw that is circumferentially arranged on described outer cap inner side, the interior perimembranous of described gear forms multiple circumferential load carrying parts along its circumferential compartment of terrain, described circumferential load carrying part is along circumferentially bearing the load from described elastic claw effect, described elastic claw is connected between described gear and described rotor so that the rotation of described gear is passed to described rotor, in the time exceeding the load of predetermined value and act on described rotor, described load cuts off the transmission of the rotation between described gear and rotor, described gear can be dallied relatively with described rotor.
Further, described power-transfer clutch also comprises the shell being 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, thereby described slide block is remained on described shell and can in preset range, relatively move by relatively described rotor by friction force, described securing rod is always pushed to remove direction with the combination of described wireline reel by described elastic element, in the time that described rotor rotates to the coiling direction of described ribbon, it is mobile that described securing rod approaches described slide block ground, remove described maintained state, under the thrust of described slide block, be combined with described wireline reel; In the time that described rotor rotates to the pull-out direction of described ribbon, it is mobile that described securing rod leaves described slide block, and described elastic element makes described securing rod move to and remain in conjunction with removing on position.
Further, described power-transfer clutch also comprises the ratchet being connected to integratedly on described wireline reel, described securing rod is always pushed to remove direction with the combination of described ratchet by described elastic element, in the time that described rotor rotates to the coiling direction of described ribbon, it is mobile that described securing rod approaches described slide block ground, remove described maintained state, under the thrust of described slide block, be combined with described ratchet, and described rotor is passed to described ratchet to the rotation of the coiling direction of described ribbon, allow described ratchet relatively to rotate to the coiling direction of described ribbon with respect to described rotor simultaneously, in the time that described rotor rotates to the pull-out direction of described ribbon, it is mobile that described securing rod leaves described slide block, and described elastic element makes described securing rod move to and remain in conjunction with removing on position.
Further, one pleurapophysis of described slide block is provided with slide, a 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 being formed on described slide block, the sliding surface forming on described clutch-bell cover is pushed down respectively at the both ends of described locking plate length direction, and scheduled volume ground elastic deformation, to make the slide of described slide block push down described power-transfer clutch enclosing cover.
Further, one end of described bending of slide block direction is formed with press section, described securing rod has the connecting strap side-prominent to the 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 on described epitrochanterian hole portion, and can engage with the described external tooth of stating ratchet.
Further, described elastic element is leaf spring, described securing rod also comprise be integrally formed with described connecting strap and be rotatably supported in described epitrochanterian bearing portion, on described rotor, be also formed with orienting lug and card column, the pars intermedia of described leaf spring is clipped between the bearing portion and described orienting lug of described securing rod, described leaf spring is against a side surface of the close described ratchet of the connecting strap of described securing rod near one end of described ratchet, the other end of described leaf spring is fastened in described card column.
Further, described power-transfer clutch also comprises and is arranged on a side contrary with described rotor of described ring and the pad that relative described wireline reel arranges coaxially, described pad is clipped between described ring and described power-transfer clutch enclosing cover, and the peripheral part of described pad is pressed in the outer cap of described ring.
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 support is arranged 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 utility model, described securing rod is always pushed to remove direction with the combination of described wireline reel by described holding member, like this, slide block does not need holding capacity under normal circumstances, only in the time of gear and rotor unitary rotation, just need holding capacity, in the time that taking-up device is not worked, slide block can not stress completely, because taking-up device is not worked the time of shared time considerably beyond taking-up device work, therefore, slide block is difficult for twisting strain or fracture occur, and has increased to a certain extent the service life of power-transfer clutch.
Brief description of the drawings
Fig. 1 is the structural representation of the Webbing take-up device that provides of the utility model one embodiment;
Fig. 2 is the structural representation that removes the Webbing take-up device after the shell of 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 of providing of the utility model one embodiment;
Fig. 5 is another visual angle figure of Fig. 4;
To be securing rod remained on to be combined with ratchet by leaf spring Fig. 6 removes locational view;
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 of providing of the utility model one embodiment;
Fig. 9 is the inner structure schematic diagram of its power-transfer clutch of Webbing take-up device of providing of the utility model one embodiment;
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 carrying 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, support axial region; 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
Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Please with reference to Fig. 1 and Fig. 2, the Webbing take-up device 10 that the utility model one embodiment 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 on it be wound around for fettering passenger's ribbon, 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, make the coiling direction rotation of described wireline reel 20 to described ribbon, cut off the transmission of the rotation that described wireline reel 20 sides produce simultaneously, to prevent that described rotation from passing to described motor 44.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 framework 12 stretches out by roughly tabular backboard 14, from the two ends entirety of the Width of this backboard 14, backboard 14 is bolted on vehicle body, thereby framework 12 is arranged on vehicle body.
Can be rotatably set between first stay bearing plate 16 and the second stay bearing plate 18 of framework 12 with the wireline reel 20 that the material such as mold part is made.Wireline reel 20 entirety become cydariform, and are connected and fixed the base end part of the ribbon that forms bar-shape.If make wireline reel 20 to the coiling direction rotation around its axis, ribbon is layeredly reeled to the peripheral part of wireline reel 20 from its base end part; On the other hand, if make wireline reel 20 to the pull-out direction rotation around its axis, ribbon is drawn out.
The second stay bearing plate 18 outstanding to the outside of framework 12 is run through in one end of wireline reel 20.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 this acceleration pick-up is connected with the torsion bar 24 that is erected at the lockplate between the first stay bearing plate 16 and the second stay bearing plate 18 and is arranged on the axle core position of wireline reel 20.When vehicle emergency slows down, by means of the action of lockout mechanism, retrain one end of torsion bar by lockplate, 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 outstanding to the outside of framework 12.Form the attaching screw 21 of hexagonal column coaxial and form 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 for example, forms case shape by metallic material (aluminum alloy), and to the direction opening contrary with the first stay bearing plate 16.This power-transfer clutch enclosing cover 102 for example, is formed tabular by metallic material (steel or iron), 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 diapires is formed with the manhole 106 coaxial with wireline reel 20.Attaching screw 21 runs through this manhole 106.And the periphery position of this manhole 106 is to the outstanding sliding surface 108 that forms ring-type of 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 that is 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 and transmit rotating of described motor 44 and rotate relative to described wireline reel 20, and the peripheral part of gear 116 is formed with worm-gear toothing 118.In the interior perimembranous of gear 116, form multiple circumferential load carrying parts 120 along its circumferential compartment of terrain.These circumferential load carrying parts 120 are corresponding with the elastic claw 182 of ring 176 described later.And, on the end face of a side of the axis direction of gear 116, form multiple rotation stopper recess 122 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, be arranged on the inside of clutch-bell cover 101 for the driving device 5 that the rotation of motor 44 is passed to gear 116, this driving device 5 comprises the contrite gear 51 on the output shaft that is connected to described motor 44, the straight gear 52 engaging with described contrite gear 51, the worm screw 53 being 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 being 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.
For example, form discoid rotor 124 by (aluminum alloys) such as metallic materials, arrange coaxially and be contained in the inner side of described gear 116 with described gear 116.Rotor 124 comprises main part 126 cylindraceous and is arranged on described main part 126 1 sides and to radially outstanding flange portion 128.The peripheral part of described main part 126 circumferentially forms multiple external tooths 130 equally spacedly along it, a side end face of described gear 116 and 128 moving contacts of described flange portion.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 diapires is formed with it and coaxially and is roughly accommodation section 132 cylindraceous, one side (direction of arrow A in Fig. 4 and Fig. 5) of described accommodation section 132 axis directions is equipped with the support axial region 133 of a ring-type coaxially, and the central authorities of this support axial region are formed with round tube hole 131.This support axial region 133 can rotate freely on the circular hole 135 that is formed at power-transfer clutch enclosing cover 102 by the rotary supporting part 175 of support 170 described later.Aforesaid lining ring 112 can rotate freely engage with the opposite side (direction of arrow B in Fig. 4 and Fig. 5) of the axis direction of accommodation section 132, the opposite side of the axis direction of accommodation section 132 can be rotated freely and is supported on clutch-bell cover 101 by lining ring 112.Thus, main part 126(or rotor 124) can be around the axis rotation of oneself.
The ratchet 134 of the roughly ring-type being formed by iron plate etc. is contained in the accommodation section 132 of this main part 126.Be formed with hook tooth 136 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 running through at aforementioned attaching screw 21, its axis entirety (can not relatively rotate) connection rotatably relatively.Thus, ratchet 134 can rotate by attaching screw 21 integratedly with wireline reel 20.
In addition, a side of ratchet 134 axis directions (the arrow B direction in Fig. 4 and Fig. 5) contacts aforementioned lining ring 112 slidably.The packing ring 140 of being 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 directions.This packing ring 140 contacts the ring-type diapire of accommodation section 132 slidably, thus, can limit along the displacement of ratchet 134 axis directions.
In addition, at the radial outside of accommodation section 132, on the diapire of main part 126, form a pair of pilot hole 142 along the circumferential skewing of main part 126.In each pilot hole 142, slide to be respectively provided with by resin material etc. and make and become roughly block slide block 144 along the circumferential skewing of main part 126.Above-mentioned a pair of 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 be with respect to main part 126(rotor 124 in the preset range along pilot hole 142) relatively move.
One 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 contrary side of slide 146 of each slide block 144 is provided with locking plate 148.Locking plate 148 is bent into level and smooth > font (its middle body is gently bending) by having the narrower sheetmetal of elastomeric width.The connecting portion 150 that is arranged on the length direction middle body of locking plate 148 embeds the connecting bore 152 being formed on slide block 144, thereby 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 respectively at the both ends of the length direction of locking plate 148, 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 is pushed down power-transfer clutch enclosing cover 102, and slide block 144 is applied to predetermined friction force along the movement (relatively moving of rotor 124 relatively) of pilot hole 142.Therefore, once rotor 124 rotates, by means of the friction force at length direction both ends that acts on slide 146 and locking plate 148, it is upper that slide block 144 is temporarily maintained at shell (clutch-bell cover 101 and power-transfer clutch enclosing cover 102), and rotor 124 can relatively move in the preset range along pilot hole 142 relatively.
Press section 145 is formed on an end of each slide block 144 bending directions.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 distolateral of each slide block 144 bending directions, 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 respectively pivot shaft 153, is provided with shrinkage pool (not indicating in figure) on the diapire of main part 126.The bearing portion 156 of each securing rod 154 can rotate freely on the diapire that is supported on main part 126 with coordinating of shrinkage pool by the pivot shaft 153 of a side (the arrow B direction in Fig. 4 and Fig. 5) of axis direction.Each securing rod 154 also has the connecting strap 168 that press section 145 to described slide block is side-prominent and form with described bearing portion, common described connecting strap 168 with described press section 145 in conjunction with removing.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 132Shang hole, the accommodation section portion 162 that is formed on rotor 124, and can engage with the external tooth of aforementioned ratchet 134 136.
In addition, main part 126 diapires of rotor are also formed with orienting lug 137 and card column 166 to a 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 and described orienting lug 137 of described securing rod, 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 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 moves relative to slide block 144, cause securing rod 154 relative to slide block 144 move and in preset range approach or away from.As shown in Figure 7, in the time that the coiling direction of described rotor 124 around axis to ribbon rotates, described securing rod 154 approaches described slide block 144 ground and moves, described press section 145 and described connecting strap 168 combinations, remove described maintained state, under the thrust of described slide block 144, the ratchet 155 of connecting strap 168 front ends and the external tooth 136 of ratchet 134 engage, make securing rod 154 and described wireline reel 20 combinations, and then the rotation of the coiling direction around described axis to ribbon passes to described wireline reel 20 by described rotor 124; And, as shown in Figure 6, in the time that the pull-out direction of described rotor 124 around axis to ribbon rotates, described securing rod 154 leaves described slide block 144 ground and moves, the ratchet 155 of connecting strap 168 front ends separates with the external tooth 136 of ratchet 134, described connecting strap 168, is removed on position thereby make described securing rod 154 be moved to and remain on described combination in the effect of described leaf spring 164 in conjunction with removing with described press section 145.
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 coaxial setting of the relatively described wireline reel 20 of support 170, rotates and rotates with rotor 124.Described support 170 can be by crimping or bayonet fitting etc. and described rotor 124 be fixed as one (the present embodiment be crimping), 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 not can landing, in the time that the coiling direction of described rotor 124 around axis to ribbon rotates, described support 170 and described securing rod 154 be together rotation thereupon, described support 170 makes footpath that the motion process of described securing rod 154 occurs in described power-transfer clutch 100 all the time upwards.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 separates 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, the support axial region 133 of rotor 124 runs through described circular hole 173, the rotary supporting part 175 that the peritreme portion of circular hole 173 is equipped with to a side contrary with rotor 124 (power-transfer clutch enclosing cover 102 sides), the support axial region 133 of rotor 124 can rotate freely in the circular hole 135 that is supported on power-transfer clutch enclosing cover 102 by this rotary supporting part 175.
In addition, the peripheral part of main part 172 offers a pair of breach 174, and the slide 146 of slide block 144 runs through this breach 174.
In addition, be provided with knock hole 171 on main part 172, described knock hole 171 is pegged graft and is coordinated with the pivot shaft 153 of the opposite side (the arrow A direction in Fig. 4 and Fig. 5) of bearing portion 156 axis directions of each securing rod 154, to ensure the axial location of securing rod 154.And as shown in Figure 8, main part 172 is pushed 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.
Such as, by a side (the arrow A direction of Fig. 4 and Fig. 5) that there is ring 176 that elastomeric metallic material (SUS etc.) makes and be arranged on the radial outside of support 170 and be arranged in the axis direction of rotor 124.Described ring 176 have push down the outer cap 178 of described gear 116, along being circumferentially arranged on the elastic claw 182 of described outer cap 178 inner sides and integrally forming in the interior perimembranous of outer cap 178 and to the outstanding multiple spline pawls 180 of its radially inner side.These spline pawls 180 engage with the rotation stopper recess 122 of aforesaid gears 116.Thus, ring 176 relative gears 116 upwards connected integratedly in its week.
There are elastomeric tabular multiple elastic claws 182 compartment of terrain whole installations in the interior perimembranous of outer cap 178.The base end part of each elastic claw 182 and outer cap 178 integrated connections.The pars intermedia of the length direction of each elastic claw 182 is to the radially inner side bending of outer cap 178, and its leading section is to the radial outside bending of outer cap 178, and each elastic claw 182 entirety are along the circumferential skewing of outer cap 178.
As shown in FIG. 6 and 7, between the external tooth 130 of rotor 124 and the inner peripheral surface of gear 116, along rotor 124 and gear 116 these elastic claws 182 are circumferentially set, the elastic force of himself is pushed its inner side part to the external tooth 130 of rotor 124.Thus, ring 176 entirety remain 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.Under this state, the outer cap 178 of ring 176 and the flange portion 128 of rotor 124 have limited the movement of gear 116 at axis direction.Under this state, 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, thereby makes said structure parts remain on predetermined assembling position.
And then the leading section of each elastic claw 182 enters respectively the wheel well of external tooth 130, a sidewall (forming the sidewall of a side along the radial parallel of main part 126) of contact external tooth 130.The circumferential load carrying 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), thereby 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 to the rotational force of ribbon coiling direction (the arrow C direction in Fig. 6 and Fig. 7) by circumferential load carrying part 120, then is 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 carrying part 120 edges., gear 116 bears the load from elastic claw 182 along its hand of rotation.
As mentioned above, elastic claw 182 is to have elastomeric sheetmetal.Therefore, the relative elastic force (thrust) that rotates produced rotational force antagonism elastic claw 182 by gear 116 relative to rotor 124, if its size is enough extracted the leading section of each elastic claw 182 from the wheel well of external tooth 130, elastic claw 182 can be removed gear 116 and rotor 124 being connected around axis.Thereby 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 encircling the leading section of 176 elastic claw 182.
In addition, the outside of the multiple external tooths 130 of outer cap 178 in rotor 124 and not contacting with multiple external tooths 130, outer cap 178 can not produce friction with multiple external tooths of rotor 124 130, thereby, on this position, avoid the generation of metal powder.
The pad 184 that is formed ring-type by resin material etc. is arranged on a side contrary with rotor 124 of encircling 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 that metal ring 176 from directly sliding with power-transfer clutch enclosing cover 102, makes to encircle 176 and relatively rotate smoothly 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, described circular 187 peritreme portion is provided with a pair of synchronization blocks 186 corresponding to a pair of slide block in opposite directions, when coiling direction at described rotor 124 around from axis to ribbon or pull-out direction rotation, a pair of synchronization blocks 186 on pad 184 ensures the synchronous of described a pair of 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 a pad 184 axially upper side near rotor 124 is provided with annular seal groove 185, correspondingly, one side (the A direction of arrow in Fig. 5 and Fig. 6) of main part 126 axis directions of described rotor is formed with annular flange 139, 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 inner peripheral surface, rotor 124 and the pad 184 of described gear 116, form confined space 200.
While there is overload, between the external tooth 130 of elastic claw 182 and rotor 124, fricative metal powder is just closed in described 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, extended the service life of power-transfer clutch.
In addition, in other not shown embodiment, can be also that pad is axially above provided with annular flange near a side of rotor, correspondingly, a side of the main part axis direction of described rotor is formed with annular seal groove, and described flange snaps in described seal groove.Equally, between inner peripheral surface, rotor and the pad of described gear, form confined space.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a Webbing take-up device, comprise wireline reel, motor and power-transfer clutch, described wireline reel can reel and pull out on it be wound around for fettering passenger's ribbon, described clutch mechanism ground is between described motor and described wireline reel, and the rotation of described motor is passed to described wireline reel, make the coiling direction rotation of described wireline reel to described ribbon, cut off the transmission of the rotation that described wireline reel side produces, to prevent that described rotation from passing to described motor simultaneously;
It is characterized in that, described power-transfer clutch comprises:
Arrange coaxially and transmit rotating of described motor and the gear that rotates relative to described wireline reel;
Arrange coaxially and be contained in the rotor of described gear inner side with described gear;
Be arranged on described epitrochanterian securing rod;
Holding member, described securing rod is conventionally remained on and removes on position with the combination of described wireline reel and described securing rod is always pushed to remove direction with the combination of described wireline reel by described holding member by described holding member, in the time that the coiling direction of described rotor around axis to ribbon rotates, 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; In the time that described rotor rotates around axis to ribbon pull-out direction, described holding member makes described securing rod move and remain on described combination releasing position.
2. Webbing take-up device according to claim 1, it is characterized in that, described power-transfer clutch also comprises the ring of a side of the axis direction that is arranged on described rotor, described ring has pushes down the outer cap of described gear and along the elastic claw that is circumferentially arranged on described outer cap inner side, the interior perimembranous of described gear forms multiple circumferential load carrying parts along its circumferential compartment of terrain, described circumferential load carrying part is along circumferentially bearing the load from described elastic claw effect, described elastic claw is connected between described gear and described rotor so that the rotation of described gear is passed to described rotor, in the time exceeding the load of predetermined value and act on described rotor, described load cuts off the transmission of the rotation between described gear and rotor, described gear can be dallied relatively with described rotor.
3. Webbing take-up device according to claim 2, is characterized in that, described power-transfer clutch also comprises the shell being 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, thereby described slide block is remained on described shell and can in preset range, relatively move by relatively described rotor by friction force, described securing rod is always pushed to remove direction with the combination of described wireline reel by described elastic element, in the time that described rotor rotates to the coiling direction of described ribbon, it is mobile that described securing rod approaches described slide block ground, remove described maintained state, under the thrust of described slide block, be combined with described wireline reel, in the time that described rotor rotates to the pull-out direction of described ribbon, it is mobile that described securing rod leaves described slide block, and described elastic element makes described securing rod move to and remain in conjunction with removing on position.
5. Webbing take-up device according to claim 4, it is characterized in that, described power-transfer clutch also comprises the ratchet being connected to integratedly on described wireline reel, described securing rod is always pushed to remove direction with the combination of described ratchet by described elastic element, in the time that described rotor rotates to the coiling direction of described ribbon, it is mobile that described securing rod approaches described slide block ground, remove described maintained state, under the thrust of described slide block, be combined with described ratchet, and described rotor is passed to described ratchet to the rotation of the coiling direction of described ribbon, allow described ratchet relatively to rotate to the coiling direction of described ribbon with respect to described rotor simultaneously, in the time that described rotor rotates to the pull-out direction of described ribbon, it is mobile that described securing rod leaves described slide block, and described elastic element makes described securing rod move to and remain in conjunction with removing on position.
6. Webbing take-up device according to claim 5, it is characterized in that, one pleurapophysis of described slide block is provided with slide, a 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 being formed on described slide block, the sliding surface forming on described clutch-bell cover is pushed down respectively at the both ends of described locking plate length direction, and scheduled volume ground elastic deformation, to make the slide of described slide block push down described power-transfer clutch enclosing cover.
7. Webbing take-up device according to claim 6, it is characterized in that, one end of described bending of slide block direction is formed with press section, described securing rod has the connecting strap side-prominent to the 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 on described epitrochanterian hole portion, and can engage with the described external tooth of stating ratchet.
8. Webbing take-up device according to claim 6, it is characterized in that, described elastic element is leaf spring, described securing rod also comprise be integrally formed with described connecting strap and be rotatably supported in described epitrochanterian bearing portion, on described rotor, be also formed with orienting lug and card column, the pars intermedia of described leaf spring is clipped between the bearing portion and described orienting lug of described securing rod, described leaf spring is against a side surface of the close described ratchet of the connecting strap of described securing rod near one end of described ratchet, the other end of described leaf spring is fastened in described card column.
9. Webbing take-up device according to claim 3, it is characterized in that, described power-transfer clutch also comprises and is arranged on a side contrary with described rotor of described ring and the pad that relative described wireline reel arranges coaxially, described pad is clipped between described ring and described power-transfer clutch enclosing cover, and the peripheral part of described pad is pressed in the outer cap of described ring.
10. according to the Webbing take-up device described in 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 support is arranged 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 |
|---|---|---|---|
| CN201420004915.5U CN203739833U (en) | 2014-01-06 | 2014-01-06 | Safety belt coiler device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420004915.5U CN203739833U (en) | 2014-01-06 | 2014-01-06 | Safety belt coiler device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203739833U true CN203739833U (en) | 2014-07-30 |
Family
ID=51339671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420004915.5U Expired - Lifetime CN203739833U (en) | 2014-01-06 | 2014-01-06 | Safety belt coiler device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203739833U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107487294A (en) * | 2016-06-10 | 2017-12-19 | Trw汽车股份有限公司 | Clutch for seat belt tensioner |
| CN108454561A (en) * | 2017-02-20 | 2018-08-28 | 株式会社东海理化电机制作所 | Webbing take-up device |
| CN110962793A (en) * | 2018-09-28 | 2020-04-07 | 比亚迪股份有限公司 | Safety belt winding device and vehicle with same |
-
2014
- 2014-01-06 CN CN201420004915.5U patent/CN203739833U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107487294A (en) * | 2016-06-10 | 2017-12-19 | Trw汽车股份有限公司 | Clutch for seat belt tensioner |
| CN107487294B (en) * | 2016-06-10 | 2021-07-02 | Trw汽车股份有限公司 | Clutch for seat belt tensioner |
| CN108454561A (en) * | 2017-02-20 | 2018-08-28 | 株式会社东海理化电机制作所 | Webbing take-up device |
| CN108454561B (en) * | 2017-02-20 | 2020-09-22 | 株式会社东海理化电机制作所 | Safety belt winding device |
| CN110962793A (en) * | 2018-09-28 | 2020-04-07 | 比亚迪股份有限公司 | Safety belt winding device and vehicle with same |
| CN110962793B (en) * | 2018-09-28 | 2022-03-18 | 比亚迪股份有限公司 | Safety belt winding device and vehicle with same |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |