Background technology
In rolling stock, each motor-driven steering box, or driving wheel bogie truck, generally include two pairs of wheels, chassis, suspender and actuating devices, wheel in pair of wheels is connected with each other by the axle for the formation of axletree, and chassis connects each other to described axletree, and each suspender is inserted between half chassis and axletree, described each suspender allows axletree to have relative vertical displacement relative to half chassis of correspondence, and actuating device makes one or the rotation of each axletree in axletree.These actuating devices comprise at least one driving engine and a mechanical device, and this mechanical device is used for guaranteeing torque to be transferred to axletree from driving engine and braking torque is transferred to driving engine from axletree.Actuating device is different according to mass distribution, and this actuating device can be " non-suspension ", is namely connected on axletree, also can be " suspension ", namely be connected on the chassis of the bogie truck above suspender.Actuating device is different according to the complexity be incorporated into regard to volume in bogie truck, and this volume is with the width axis being parallel of axletree (namely with) or weigh with length (parallel with vehicle direct of travel).The number of the parts of complexity included by actuating device of actuating device and different.
In order to reduce the perpendicular stress on wheelspan, it is favourable for reducing non-suspended mass.In order to make the integration of actuating device be more prone to, reduced volume is favourable.
The bogie truck of known a kind of rolling stock from EP 1 320 478, wherein, the rotor of driving engine is connected with axletree, and stator is installed on axletree by the centre portion of bracket, to make the non-suspension of driving engine.Be hinged on stator and bogie truck chassis on reaction bar allow to recapture torque and guarantee the motion between truck chassis and axletree wheel shaft trip between stroke.Actuating device is therefore compact especially.But the actuating device with Tai Gaofei suspended mass has the defect of the speed of restriction vehicle.In addition, when wheelspan and wheel diameter constant, increase the torque be applied on axletree be very difficult.
The bogie truck of known a kind of rolling stock from WO 2006/051046, wherein, rotor forms the hollow shaft with axletree almost coaxial, engine suspension.In order to compensate the motion between truck chassis and axletree wheel shaft trip between stroke, allow that rotor guarantees the transmission of torque between rotor and axletree relative to the coupling member being placed on the axial end portion of rotor of the slight eccentricity of the axis of axletree.Therefore non-suspended mass is reduced.However, this transmission adds the volume of bogie truck on vehicle direct of travel.In addition, driving engine occupies less space between wheel, to make the length of iron and therefore to make the torque that is applied on axletree, than less in the technical scheme described in EP1 320 478.
Summary of the invention
The object of this invention is to provide a kind of driving wheel bogie truck, this driving wheel bogie truck comprises the actuating device of axletree and not only compact but also strong.Other object obtains being easy to realization and the actuating device reducing non-suspended mass.
For this reason, the present invention is intended to a kind of driving wheel bogie truck of the above-mentioned type, and wherein, driving engine is rotated by the centre portion axle shaft of retarder.
According to embodiments of the invention, the bogie truck that moves in turn has following one or more feature equally, technically adopts separately or continues to use all possible combination:
Driving engine is inserted between two wheels of pair of wheels;
Retarder is epicycloid shape gear system reducer;
Bogie truck comprises chassis and the suspender between chassis and axletree, and described suspender fitted to be the relative vertical displacement allowing axletree relative to chassis, and driving engine is rigidly fixed to chassis;
Retarder comprises the engaged element connect with axletree;
Driving engine comprises the output gear directly engaged with retarder;
Driving engine comprises the rotor installed around axletree;
Driving wheel bogie truck comprises the hollow shaft for driving being transferred to from driving engine axletree, and hollow shaft is inserted between axletree and rotor;
Driving wheel bogie truck comprises the first coupling member for being connected to by rotor on hollow shaft, and described first coupling member is suitable for allowing the axis of rotor to have certain inclination relative to the axis of hollow shaft;
Driving wheel bogie truck comprises the first coupling member for being connected to by hollow shaft on axletree, and described first coupling member is suitable for allowing the axis of hollow shaft to have certain inclination relative to the axis of axletree;
Driving wheel bogie truck comprises the second coupling member for being connected to by hollow shaft on the input gear of retarder, and described second coupling member is suitable for allowing the axis of input gear to have certain inclination relative to the axis of hollow shaft;
Driving engine is internal rotor driving engine.
Similarly, the present invention is intended to a kind of rolling stock comprising the driving wheel bogie truck be defined as above.
Detailed description of the invention
Hereinafter, term " vertically " and " level " define relative to the bogie truck be arranged in rolling stock.Therefore, horizontal plane and axletree extend plane substantially parallel and vertical plane surface and wheel to extend plane substantially parallel.Term " longitudinal direction " defines relative to the direction that rolling stock extends on the horizontal level and " transverse direction " defines along direction substantially vertical with longitudinal direction in the horizontal plane.
Each in driving wheel bogie truck 10 shown in Fig. 1 and 2, comprise two pairs of wheels 20, the wheel 20 in often pair of wheel is connected with each other to form axletree 22 by axle.Axletree 22 is connected with each other by chassis 24, that is, comprises two and half chassis and each half chassis is connected with respective axletree 22.By the chassis of outside, the longeron 26 on each half chassis known is along the longitudinal direction around wheel 20, and namely longeron extends to the profile exterior formed by wheel 20.
Each half chassis comprises two substantially longitudinally extending longerons 26, and this longeron is connected with each other by the crossbeam (not shown) of basic horizontal expansion.Each longeron 26 is placed on the axle box 28 of axletree 22, and the wheel 20 that described axle box 28 leans on axletree 22 is placed on the both sides of described wheel 20.
Primary suspension part 30 is inserted between the axle box 28 that each longeron 26 and described longeron 26 settle.This primary suspension part 30 allows axletree 22 relative to the displacement of the Relative vertical on half chassis, and namely half chassis is movable and hangs relative to axletree 22 along substantially vertical direction.
Two and half chassis be fixed to one another to make axletree 22 keeping parallelism and bogie truck 10 can not under the effect of normal load folding.
At least one in axletree 22, or two axletrees 22, be driven in rotation by means of actuating device 32, this actuating device comprises driving engine 34, retarder 36 and mechanical device 38, this mechanical device 38 is guaranteed torque to be transferred to axletree 22 from driving engine 34 and braking torque is transferred to driving engine 34 from axletree 22.
Driving engine 34 hangs, and namely driving engine is rigidly connected to chassis 24.In addition, driving engine 34 and axletree 22 almost coaxial near stroke between the wheel shaft that suspender 30 is permitted is swum.Between the wheel shaft trip that described suspender 30 is permitted, the absolute value of stroke is less than 30mm especially.Preferably, time static, driving engine 34 is coaxial with axletree 22.
Driving engine 34 inserts between the wheel 20 of axletree 22.
Driving engine 34 is installed around axletree 22.In other words, driving engine 34 defines the tubular cavity 40 of being passed by axletree 22.
Driving engine 34 comprises rotor 42 and stator 44.
Stator 44 is rigidly connected to chassis 24 by transom 46.In rigidity is installed, this transom 46 forbids all displacements of stator 44 relative to chassis 24.
Rotor 42 is coaxial with stator 44.The connection of rotor 42 to stator 44 guaranteed by bracket 48, permits rotor 42 simultaneously and rotate relative to stator 44 around the axis of this rotor.
Rotor 42 defines tubular cavity 40, and stator 44 is installed around rotor 42.Therefore, driving engine 34 forms inner rotator driving engine.
Retarder 36 and axletree 22 almost coaxial.
Retarder 36 is epicycloid shape gear system reducers.Known retarder comprises multiple engaged element 50,52,54,56, wherein, inside center wheel 50 forms the input gear installed around axletree 22 of retarder 36, the outside hub wheel 52 being also referred to as crown gear is taken turns 50 coaxial with inside center, multiple planetary wheel 54 is placed between inside center wheel 50 and crown gear 52, each planetary wheel 54 and inside center take turns 50 and crown gear 52 engage, and each planetary wheel 54 described is rotatably mounted on around this planetary axis and takes turns with inside center on 50 and the coaxial planetary gear carrier 56 of crown gear 52.
Mechanical device 38 comprises hollow shaft 60, component 62 and component 64, and the hanging element of transmitting device 32 is connected to hollow shaft 60 by the component 62 being called as driving disc spacing pressing equally, and hollow shaft 60 is connected to non-hanging element by the component 64 being called as clutch plate equally.
Hollow shaft 60 inserts between axletree 22 and driving engine 34, inserts between axletree 22 and rotor 42 especially.Hollow shaft is through tubular cavity 40.Hollow shaft defines the cylindrical cavity 66 passed by axletree 22.Hollow shaft and axletree 22 almost coaxial, the i.e. axis of hollow shaft 60 and the axes intersect of axletree 22, the absolute value of the angle of two axial lines is less than 3 ° all the time simultaneously.
Coupling member 62,64 is placed on the axial end portion of hollow shaft 60.Therefore coupling member laterally surrounds hollow shaft 60.
Each coupling member, is respectively 62,64, and the axis of axle relative to hanging element, the axis relative to non-hanging element that are suitable for permission hollow shaft 60 have certain inclination respectively.
For this reason, each coupling member, is respectively 62,64, comprises and the rigid annular dish 70 of axletree 22 almost coaxial, the first pair of rigid roller 72 connect with hollow shaft 60 and the second pair of rigid roller 74 connect with hanging element, non-hanging element respectively.Dish 70 defines to each roller 72,74 the respective cylindrical cavity 76 receiving described roller 72,74.Each bossed cylindrical surface of roller 72,74 tool and be less than the maximum gauge of respective receiving compartment 76.Each coupling member 62,64 also comprises the respective sleeve pipe 78 for each roller 72,74, described sleeve 78 surrounds roller 72,74 by the gap filled up between roller 72,74 and respective receiving compartment 76, and described sleeve 78 is made up of such as rubber elastomeric material.Dish 70 and roller 72,74 are formed from steel usually.
In first embodiment of Fig. 1, retarder 36 is non-suspension and formation is connected to the non-hanging element on hollow shaft 60 by the centre portion of coupling member 64, and the hanging element be connected on hollow shaft 60 by the centre portion of coupling member 62 is made up of driving engine 34.Planetary gear carrier 56 and axletree 22 connect, connect with one of wheel 20 of axletree 22 especially, and crown gear 52 is connected to chassis 24 by the reaction bar 80 be hinged on crown gear 52 and chassis 24, between swimming with the wheel shaft making described bar 80 be applicable to cause by moving between allowance chassis 24 and axletree 22, stroke recaptures torque.
At work, rotor 42 drives hollow shaft 60 to rotate around the axis of hollow shaft 60 by the centre portion of coupling member 62.This centre portion being rotated through coupling member 64 is sent to the inside center wheel 50 of retarder 36.Inside center wheel 50 drives planetary wheel 54 rotation of rolling on crown gear 52.This makes, planetary wheel 54 drive planetary gear carrier 56 detour gear rack 56 axle rotate and, axletree 22 is rotated.
When axletree 22 is relative to chassis 24 vertical displacement, the axis of driving engine 34 keeps fixing relative to chassis 24, but the axis of retarder 36 follows the displacement of axletree 22.The relative displacement of following by the axis of driving engine 34 and retarder 36, this makes two axis be originally parallel to each other no longer align.Therefore, hollow shaft 60 tilts towards the direction of the axis of opposite engine 34 and retarder 36, due to the use of the distinctive shape of roller 72,74 and the sleeve pipe 78 for the elastomeric material that fills up gap between roller 72,74 and respective receiving compartment 76, this inclination is allowed to.
This embodiment has the torque transmitted by coupling member 62,64 and keeps relatively low advantage, to use light and unheavy coupling member.But the shortcoming of this embodiment is, there is excessive non-suspended mass, and must inside center take turns 50 and the interface of axletree 22 bracket of resistance to High Rotation Speed is installed.
In second embodiment of Fig. 2, retarder 36 hangs and forms the hanging element be connected to by the centre portion of coupling member 62 on hollow shaft 60, is connected to non-hanging element on hollow shaft 60 by axletree 22, be particularly made up of the wheel 20 of axletree 22 by the centre portion of coupling member 64.So rotor 42 and the inside center of driving engine 34 are taken turns 50 and connect, because which form the output gear be directly engaged on retarder 36 of driving engine 34, and stator 44 and crown gear 52 connect.
At work, the inside center wheel 50 of rotor 42 Direct driver retarder 36.Inside center wheel 50 drives planetary wheel 54 rotation of rolling on crown gear 52.This makes, planetary wheel 54 drive planetary gear carrier 56 detour gear rack 56 axis rotate.The centre portion being rotated through coupling member 62 of planetary gear carrier 56 is transferred to hollow shaft 60.Hollow shaft 60 passes through the rotation of centre portion around the final axle shaft 22 of rotation of the axis of hollow shaft 60 of coupling compoonent 64.
When axletree 22 is relative to chassis 24 vertical displacement, the axis of driving engine 34 and retarder 36 keeps fixing relative to chassis 24.Even if the axis of driving engine 34 and retarder 36 is relative to the axis keeping parallelism of axletree 22, the axis of driving engine 34 and retarder 36 also no longer with the axial alignment of axletree 22.Therefore, hollow shaft 60 tilts towards the direction of the axis of relative retarder 36 and axletree 22, due to the use of the distinctive shape of roller 72,74 and the sleeve pipe 78 for the elastomeric material that fills up gap between roller 72,74 and respective receiving compartment 76, this inclination is allowed to.
This embodiment has the advantage of a small amount of non-suspended mass.In addition, behave driving engine 34 being connected to retarder 36 allows to have breakthrough on overall compact degree.But the torque consequently transmitted by coupling member 62,64 is larger, and this must use heavier and that volume is larger coupling member.
In view of above-mentioned the present invention, the device by means of high-power and high compactness implements the driving of axletree.