CN109157337A - A kind of Medical transporter - Google Patents

Abstract

The present invention relates to technical field of medical equipment more particularly to a kind of transport devices of climbing stairs, comprising: levelling mechanism；Stretcher is fixed on the levelling mechanism；Power mechanism is fixed on the levelling mechanism；Planetary gear set is connect with the power mechanism；Clutch controls the planetary gear set and switches between the first working condition and the second working condition.The beneficial effects of the present invention are: it is steady to provide a kind of holding stretcher in upper and lower stair or turn, and the Medical transporter of subsidiary power mechanism, adapt to patient's transfer in various situations, it then follows the section power and time saving principle of medical care, it avoids generating secondary damage, improves the comfort of patient.

Description

A kind of Medical transporter

Technical field

The present invention relates to technical field of medical equipment more particularly to a kind of transport devices of climbing stairs.

Background technique

In real life, often there is a situation where needing to see a doctor or promptly rescuing patient, there are many situations, if lived No elevator upstairs, be difficult by patient transfer go downstairs；Or be that fire has occurred in hospital, it needs quickly to transport under patient Building can only shift patient from stair channel, but patient is usually handicapped even if there is this when elevator that can not use Or lose the personage of ability to act, can not wheelchair, at this point, in emergency circumstances only using bed nearby by doctor or nurse Single patient that will need to shift carries out manpower transhipment, although patient smoothly can be transferred completely into safety in the case where more than the people Place, but patient's secondary damage is likely resulted in the transfer process without any measure, the especially patient of spinal injury.

In addition, in the case where can use elevator, but the elevator of most cell installations is all small elevator (1.6m × 1.5m), medical stretcher or transfer hospital bed cause to stay in high-rise trouble all because too long (long 2m or so) is without can enter Person, because stupor or wound needs shift when, even if there is elevator but still inconvenient to use.

Chinese patent CN201620309468.3 discloses a kind of track-mounted electric Stretcher for stair, it includes back board module, The back board module back side is hinged with crawler belt beam assembly, and crawler belt beam assembly includes two track beams in left and right, track beam upper and lower ends difference Passive Athey wheel and drive sprocket are set, around crawler belt is equipped between passive Athey wheel and drive sprocket, are arranged on track beam Dynamic component, Power Component is for driving drive sprocket, the track-mounted electric Stretcher for stair, can electronic realization stretcher it is flat Steady stair activity is not necessarily to Manual-pushing, but unstable security risk is grabbed in the presence of the crawler belt of the stretcher, once it skids, meeting Serious second accident is caused, patient is needed to have certain capacity, can freely manipulate Power Component.

Chinese patent CN201420503881.4 discloses a kind of safe transfer nursing bed for capableing of upper and lower stair, uses Slidably, telescopic supporting leg, supporting leg lower end are equipped with triangle pulley yoke pulley so that nursing bed can not only tilt into Enter elevator, and in walk-up situation can stair activity, guarantee patient's safe transfer in the state of recumbency, not by secondary Damage, but the nursing bed needs Manual-pushing, and regulation performance when encountering the different stair of the gradient is poor, and patient still cannot relax It is suitable and safety to be transferred.

Summary of the invention

The invention mainly solves the technical problem of providing one kind can adapt to the Medical transporters of multiple road conditions automatically, Stair activity or staircase can make patient lay flat on one's back transfers in the case where turning round, guarantee safe transfer patient.

The purpose of the present invention is achieved through the following technical solutions:

A kind of Medical transporter, comprising: levelling mechanism；Stretcher is fixed on levelling mechanism；Power mechanism is fixed on On levelling mechanism；Planetary gear set is connect with power mechanism；Clutch controls planetary gear set in the first working condition and the second work Make to switch between state.

Further, planetary gear set includes bracket and rack-mount idler wheel, in the first operative state, clutch It is unclamped with bracket, power mechanism drives idler wheel；In a second operative state, clutch and support assorted, power mechanism at least drive Dynamic bracket, facilitates dynamic structure to switch driven object.

Further, planetary gear set further includes center sprocket wheel and chain, and chain connects center sprocket wheel and idler wheel, and idler wheel is circumferential It is evenly distributed on bracket, idler wheel cuts planetary gear set between fixed wheel system and planetary gear set at least provided with 2 It changes.

Further, idler wheel is connect with bracket by bearing, and planetary gear set further includes driven sprocket, during chain is sequentially connected Heart sprocket wheel, driven sprocket and idler wheel are convenient for center chain wheel drive idler wheel, improve the stability of power transmission.

It further, further include Huan Xi mechanism, Huan Xi mechanism includes four enclosed by long fixed swing arm and short fixed swing arm Square structure, adjacent long fixed swing arm and short fixed swing arm, which are hingedly formed, compresses handoff block, compresses handoff block and clutch engagement, Improve the flexibility of switching planetary gear set.

Further, Huan Xi mechanism further includes adjusting block, two-way lead screw and to change be handle, adjusting block both ends respectively with it is long solid Fixed pendulum arm is hinged, and the central through hole of two-way lead screw and adjusting block is threadedly engaged, and is provided with that change be handle on two-way lead screw, by changing It is that handle can quickly control clutch, to flexibly switch the working condition of planetary gear set.

Further, clutch includes flywheel, and flywheel connects planetary gear set, in the first operative state, compresses handoff block With clutch interval, flywheel is static；In a second operative state, it compressing handoff block and squeezes clutch, power mechanism drives flywheel, Bracket rotation is driven, the driven object of power mechanism is controlled by flywheel, it is easy to operate.

Further, levelling mechanism includes the curved sliding rail of litter frame and supporting support, is provided with diaphragm bullet in sliding rail Spring, stretcher are fixed on litter frame, and litter frame is additionally provided with leveling roller wheels fixing axle and bearing, is provided with sliding slot on sliding rail, Bearing moves in sliding slot, makes device in the levelness of the adjustable stretcher of non-horizontal road conditions, and patient on stretcher is made to keep balance, Improve the comfort of patient.

Further, power mechanism includes differential mechanism and the motor that is fixed on motor fixing plate, and differential mechanism drives planet Wheel group drives planetary gear set by differential mechanism, improves the stability of device.

Further, differential mechanism includes main power shaft, driven shaft, active shaft bevel gears and follow bevel gear, motor driven Main power shaft, main power shaft drive planet by driven shaft by driving shaft bevel gear driving driven wheel of differential, driven wheel of differential Wheel group, the revolving speed of control device both sides idler wheel improve balance of the device when turning round.

The beneficial effects of the present invention are: it is steady and subsidiary dynamic to provide a kind of holding stretcher in upper and lower stair or turn The Medical transporter of force mechanisms adapts to patient's transfer in various situations, it then follows the section power and time saving principle of medical care avoids Secondary damage is generated, the comfort of patient is improved.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.

Fig. 1 is the structural schematic diagram of Medical transporter of the invention

Fig. 2 is the structural schematic diagram of planetary gear set of the invention

Fig. 3 is the schematic diagram of Huan Xi mechanism of the invention

Fig. 4 is the structural portion explosive view of clutch of the invention

Fig. 5 is the structural schematic diagram of differential mechanism of the invention

Fig. 6 is the structural schematic diagram of levelling mechanism of the invention

Fig. 7 is the use state diagram of Medical transporter of the invention

Fig. 8 is another use state diagram of Medical transporter of the invention

Fig. 9 is another use state diagram of Medical transporter of the invention

Wherein, the short fixed swing arm of 1-, 2- transmission shaft, 3- clutch, 4- leveling roller wheels, 5- leveling roller wheels fixing axle, 6- load Frame, 7- litter frame, 8- motor, 9- motor fixing plate, 10- sliding rail, the fixed swing arm of 11- long, 12- planetary gear set, 13- are adjusted Block, it is handle that 14-, which is changed, 15- Bidirectional-screw, and 16- compresses handoff block, 17- differential mechanism, and 18- plastics are applied arbitrarily, 19- bearing, 21- spiral shell Mother, 22 (26)-driven shaft, 23- tapered roller bearing, 24- main power shaft, 25- fixing axle, 27 fixed frames, 28- is from mantle tooth Wheel, 29- follow bevel gear, 30- clutch outer member, 31- diaphragm spring, 32- pivot cup, 33- platen, 34- damper disk, 35 is solid Determining short axle, the fixed long axis of 36-, 37- adjusts gasket, 38- friction shim, 39- flywheel, 40- friction washer, 41- hub plate, 42- damping spring, 43- setting-up piece, 44- release bearing, 45- fixture nut, 46- driven sprocket, 47- pulley, 48- chain, The center 49- sprocket wheel, 50- bracket.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.

As shown in figures 1 to 6, the present invention provides a kind of Medical transporter, comprising: levelling mechanism, stretcher 6 are fixed on leveling In mechanism, power mechanism is fixed on levelling mechanism, and planetary gear set is connect with power mechanism, and clutch 3 controls planetary gear set Switch between the first working condition and the second working condition.Specifically include short fixed swing arm 1, transmission shaft 2, clutch 3, leveling Idler wheel 4, leveling roller wheels fixing axle 5,6 cushion 6 of stretcher, litter frame 7, motor 8, motor fixing plate 9, sliding rail 10, long fixed pendulum Arm 11, planetary gear set 12, adjusting block 13, to change be handle 14, Bidirectional-screw 15, compresses handoff block 16, the components such as differential mechanism 17.

When in use, patient lies low on stretcher 6, and according to the difference of road conditions, levelling mechanism is used to adjust the balance of stretcher 6 Property, when Medical transporter is on level land, stretcher 6 and ground keep horizontal, when climbing or upper and lower stair, according to this hair The high low state of 12 groups of planetary gear of two groups of the front and back of bright offer, mobile, the adaptive tune of levelling mechanism control front and back litter frame 7 The balance for saving stretcher 6 keeps stretcher 6 and horizontal plane holding horizontal, therefore the patient on stretcher 6 will not feel good, and improve patient Comfort level.

Driven sprocket 46, chain 48, center sprocket wheel 49, bracket 50, constitutes planetary gear set 12 of the invention at pulley 47, It is also main movement executing agency of the invention.It is provided with gear on pulley 47, chain 48 is sequentially connected center sprocket wheel 49, driven Sprocket wheel 46 and idler wheel 47.17 power of differential mechanism is input to transmission shaft 2, and then center sprocket wheel 49 is driven to rotate, and center sprocket wheel 49 is logical Crossing chain 48 drives driven sprocket 46 to rotate, and then with movable pulley 47, thus the rotation of three pulleys 47 of driving.

When Medical transporter provided by the invention level land when driving, train is fixed shaft gear train, i.e., in planetary gear set 12 47 level of any two pulley land realize it is forward；When Medical transporter provided by the invention encounters obstacle or stair, Manually adjust Huan Xi mechanism, make the clutch 3 for connecting planetary gear set 12 by bracket 50 and power input shaft 2 be linked to be one it is whole Body drives bracket 50 to overturn to evolve into planetary gear set by fixed shaft gear train, and entire bracket 50 forms a big movement at this time Wheel, and the pulley 47 on bracket 50 is equivalent to touchdown point, bracket 50 realizes rotation at this time, and the pulley 47 on bracket 50 can not turn Dynamic, movement is realized in the rotation for only relying on bracket 50, can also be made bracket 50 and pulley 47 while be rotated, further increase planetary gear The road holding of group 12, improves the movenent performance of Medical transporter provided by the invention, to realize obstacle detouring and upper and lower stair. The circumferential uniform design of bracket 50 has 3 impellers, i.e. the axis angle of adjacent fan-wheel is 120 °, activity installation one on each impeller A pulley 47, pulley 47 are movably connected on bracket 50 by bearing, and pulley 47 can be rotated freely around bearing centre.Successively mark For pulley A, pulley B, pulley C, it is located at the center of circle of 3 pulleys on the same circle, can not also be circumferentially uniformly arranged or 3 The center of circle of a pulley 47 is not located on the same circle, will increase jolting for Medical transporter in this way, makes patient on stretcher 6 not It is suitable.In the first operative state, the pulley A and pulley B to land can freely be rolled on ground, and the pulley C not landed is in bracket On be freely rotated, with the advance of Medical transporter, the moment keeps pulley A and pulley B and ground face contact, and pulley C is not contacted Ground is maintained on bracket and is freely rotated.In a second operative state, holder pivots drive all pulleys to overturn, in certain a period of time It carves, pulley A and pulley B contact ground, and pulley C is not in contact with the ground, and with the advance of Medical transporter, pulley B and pulley C are connect Tread surface, pulley A are not in contact with the ground；Pulley C and pulley A contacts ground, and pulley B is not in contact with the ground；Pulley A and pulley B contact Ground, pulley C are not in contact with the ground；Pulley A and pulley B contacts ground, and pulley C is not in contact with the ground ... loops back and forth like this, real Existing obstacle detouring and upper and lower stair, also can be set 3 or more impellers in other embodiments, on bracket 50.

Clutch 3 is mainly by clutch outer member 30, diaphragm spring 31, pivot cup 32, platen 33, damper disk 34, fixation Short axle 35, fixed long axis 36, adjustment gasket 37, friction shim 38, flywheel 39, friction washer 40, hub plate 41, damping spring 42, setting-up piece 43, release bearing 44, fixture nut 45 etc. form, and wherein flywheel 39 and the planetary gear set 12 pass through the six roots of sensation Small axis connection can also be connected to together by other fixed forms.Clutch 3 is provided with central through hole, above-mentioned clutch 3 zero Part coaxial arrangement, driven shaft 22 pass through the central through hole of clutch 3, power are inputed to planetary gear set 12, in the first work shape Under state, Huan Xi mechanism does not squeeze clutch 3, and flywheel 39 is static at this time, and bracket 50 does not also rotate, and driven shaft 22 will drive center chain 49 rotation of wheel, center sprocket wheel 49 drive driven sprocket 46 to rotate by chain 48, and then with movable pulley 47, thus three cunnings of driving The rotation of wheel 47；In a second operative state, Huan Xi mechanism squeezes clutch 3, at this time flywheel 39 and 2 associated movement of transmission shaft, Since flywheel 39 is fixedly connected with bracket 50, and then with 50 rotary motion of moving frame, the pulley 47 on bracket 50 can not be rotated, only Movement is realized by the rotation of bracket 50, can also be made bracket 50 and pulley 47 while be rotated, further increase planetary gear set 12 Road holding, improve the movenent performance of Medical transporter, realize the function of upper and lower stair.

Short fixed swing arm 1, long fixed swing arm 11, adjusting block 13, change be handle 14, two-way lead screw 15 and compress handoff block with The fitting of clutch 3 16 constitutes Huan Xi mechanism of the invention, for switching the planetary gear of Medical transporter provided by the invention The working condition of group 12.Long fixed swing arm 11 and short fixed swing arm 1 enclose tetragonal, real using the unstability of quadrangle It now adjusts, adjacent long fixed swing arm 11 and short fixed swing arm 1 hingedly form and compress handoff block 16, are provided with spiral shell in handoff block 13 Line through-hole, two-way lead screw 15 and the tapped through hole threaded engagement on adjusting block 13, it is hinged between adjacent short fixed swing arm 1.This The compression handoff block 16 and clutch 3 for inventing the Huan Xi mechanism provided cooperate, and in the first operative state, being changed by adjusting is handle Hand 14 rotates Bidirectional-screw 15, makes to move towards between two adjusting blocks 13, the angle between long fixed swing arm 11 adjacent at this time Degree becomes smaller, and since quadrangle is unstable, the distance between two compression handoff blocks 16 on the same tetragonal are reduced at this time, Clutch 3 will not be squeezed by compressing handoff block 16, and flywheel 39 is static at this time, and bracket 50 does not also rotate, and driven shaft 22 will drive center Sprocket wheel 49 rotates, and center sprocket wheel 49 drives driven sprocket 46 to rotate by chain 48, and then with movable pulley 47, drives three pulleys 47 rotation；In a second operative state, manually adjust that change be handle 14, rotate Bidirectional-screw 15, make two adjusting blocks 13 it Between relatively move, the angle between adjacent at this time long fixed swing arm 11 becomes larger, since quadrangle is unstable, at this time same four The distance between two compression handoff blocks 16 on square structure increase, and compress handoff block 16 and squeeze clutch 3, Huan Xi mechanism squeezes Clutch 3, flywheel 39 and 2 associated movement of transmission shaft, since flywheel 39 is fixedly connected with bracket 50, and then drive bracket 50 at this time It is rotated, the pulley 47 on bracket 50 can not rotate, and movement is realized in the rotation for only relying on bracket 50, can also make to prop up Frame 50 and pulley 47 rotate simultaneously, further increase the road holding of planetary gear set 12, improve the movenent performance of Medical transporter, Realize the function of upper and lower stair.

Leveling roller wheels 4, leveling roller wheels fixing axle 5, stretcher 6, litter frame 7 and sliding rail 10 constitute leveling machine of the invention Structure, for adjusting the balance of stretcher 6.Leveling roller wheels 4 are applied arbitrarily 18 with plastics by bearing 19 and are formed, and by leveling roller wheels fixing axle 5 are fixed on litter frame 7 by nut 21, gasket, and diaphragm spring 31 is provided on sliding rail 10, and leveling roller wheels 4 can be in sliding rail Interior movement, diaphragm spring 31 prevent leveling roller wheels 4 from detaching sliding rail 10, litter frame during exercise for abutting leveling roller wheels 4 7 upper end supports stretcher 6, and lower end connects leveling roller wheels 4.Sliding rail 10 provided by the invention be it is curved, since stretcher 6 is horizontal , on the vertical direction along stretcher 6, the intermediate high both ends of presentation are low, moved in sliding rail 10 according to front and back leveling roller wheels 4, adjust The equilibrium state for saving stretcher 6, even Medical transporter provided by the invention is inclined during upper and lower stair, Can make stretcher 6 is in horizontal state.

The use state of Medical transporter provided by the invention is described below in conjunction with Fig. 7-9.

As shown in fig. 7, Medical transporter provided by the invention is placed on level ground, start on motor fixing plate 9 Motor 8, motor 8 drive main power shaft 24 to rotate, and driven wheel of differential 28 ratcheting therewith is driven by follow bevel gear 29, into And driven shaft 26 is driven to rotate.Driven shaft 26 delivers power to center sprocket wheel 49, center sprocket wheel 49 by chain 48 drive from Movable sprocket 46 rotates, and then drives the pulley 47 for passing through axis connection, rolls by two pulleys 47 to land, when former and later two electricity When the revolving speed of machine is identical, the straight ahead of Medical transporter is realized.When the revolving speed difference of former and later two motors, current motor turns When speed is higher than rear motor, differential mechanism 3 adjusts the speed between left and right pulley 47 by the transmission ratio between each different gears of adjusting Degree, is embodied in that left side pulley speed is low, and right side pulley speed is high, and the move forward left side in direction of Medical transporter is turned round； When current motor revolving speed is lower than rear motor, left side pulley speed is high, and right side pulley speed is low, and Medical transporter moves forward direction Rear side turn round, therefore Medical transporter provided by the invention can also not only be turned round with straight-line travelling.

As shown in FIG. 8 and 9, when Medical transporter provided by the invention needs to go up a slope or go upstairs, adjusting is changed It is handle 14, rotates Bidirectional-screw 15, make to relatively move between two adjusting blocks 13, between long fixed swing arm 11 adjacent at this time Angle become larger, two on the same tetragonal compress the distance between handoff block 16 and increase, and compress handoff block 16 and squeeze Clutch 3, Huan Xi mechanism squeeze clutch 3, at this time flywheel 39 and 2 associated movement of transmission shaft, since flywheel 39 and bracket 50 are solid Fixed connection, and then the bracket 50 of planetary gear set 12 is driven to be rotated, the gap between adjacent pulleys 47 can be used for overcoming The blocking of obstacle or step edge, when stretcher 6 occurs unbalanced, preceding leveling roller wheels 4 are mobile to 10 center of sliding rail, reduce The height of 6 front of stretcher, 6 forward and backward height difference of stretcher are used to offset the height of ramp or stair, thus guaranteeing 6 level of stretcher In the case of, it realizes climbing or goes upstairs.

When Medical transporter provided by the invention needs descending or goes downstairs, it is handle 14 that adjusting, which is changed, rotation Bidirectional-screw 15 makes to relatively move between two adjusting blocks, and the angle between long fixed swing arm 11 adjacent at this time becomes larger, same The distance between two compression handoff blocks 16 on a tetragonal increase, and compress handoff block 16 and squeeze clutch 3, Huan Xi mechanism Clutch 3 is squeezed, at this time flywheel 39 and 2 associated movement of transmission shaft, since flywheel 39 is fixedly connected with bracket 50, and then drives row The bracket 50 of star-wheel group 12 is rotated, and the gap between adjacent pulleys 47 can be used for overcoming the resistance of obstacle or step edge There is imbalance in gear, stretcher 6, and rear leveling roller wheels 4 are mobile to 10 center of sliding rail, reduce the height at 6 rear portion of stretcher, 6 front and back of stretcher Difference in height is used to offset the height of ramp or stair, to realize descending in the case where guaranteeing 6 level of stretcher or go upstairs.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of Medical transporter characterized by comprising

Levelling mechanism；

Stretcher is fixed on the levelling mechanism；

Power mechanism is fixed on the levelling mechanism；

Planetary gear set is connect with the power mechanism；

Clutch controls the planetary gear set and switches between the first working condition and the second working condition.

2. Medical transporter according to claim 1, which is characterized in that the planetary gear set includes bracket and is mounted on Idler wheel on the bracket, under first working condition, the clutch and the bracket unclamp, and the power mechanism drives Move the idler wheel；Under second working condition, the clutch and the support assorted, the power mechanism are at least driven The bracket.

3. Medical transporter according to claim 2, which is characterized in that the planetary gear set further include center sprocket wheel and Chain, the chain connect the center sprocket wheel and the idler wheel, and the idler wheel is circumferentially uniformly distributed on the bracket, described Idler wheel is at least provided with 2.

4. Medical transporter according to claim 3, which is characterized in that the idler wheel and the bracket are connected by bearing It connects, the planetary gear set further includes driven sprocket, and the chain is sequentially connected center sprocket wheel, driven sprocket and idler wheel.

5. Medical transporter according to claim 2, which is characterized in that it further include Huan Xi mechanism, the Huan Xi mechanism Including the tetragonal enclosed by long fixed swing arm and short fixed swing arm, the adjacent long fixed swing arm and the short fixed pendulum Arm, which is hingedly formed, compresses handoff block, the compression handoff block and the clutch engagement.

6. Medical transporter according to claim 5, which is characterized in that the Huan Xi mechanism further includes adjusting block, double To lead screw and to change be handle, and the adjusting block both ends are hinged with long fixed swing arm respectively, the two-way lead screw and the adjusting block Central through hole be threadedly engaged, be provided with that change be handle on the two-way lead screw.

7. Medical transporter according to claim 5, which is characterized in that the clutch includes flywheel, the flywheel The planetary gear set is connected, under first working condition, the compression handoff block and the clutch interval, the flywheel It is static；Under second working condition, the compression handoff block squeezes the clutch, and the power mechanism driving is described to fly Wheel drives the bracket to rotate.

8. Medical transporter according to claim 1-7, which is characterized in that the levelling mechanism includes stretcher Bracket and the curved sliding rail for supporting the litter frame are provided with diaphragm spring on the sliding rail, and the stretcher is fixed on described Litter frame, the litter frame are additionally provided with leveling roller wheels fixing axle and bearing, and sliding slot, the axis are provided on the sliding rail It holds and is moved in the sliding slot.

9. Medical transporter according to claim 8, which is characterized in that the power mechanism includes differential mechanism and fixation Motor on motor fixing plate, the differential mechanism drive the planetary gear set.

10. Medical transporter according to claim 9, which is characterized in that the differential mechanism includes main power shaft, driven Axis, active shaft bevel gears and follow bevel gear, main power shaft described in the motor driven, the main power shaft pass through the active Shaft bevel gears drive the driven wheel of differential, and the driven wheel of differential drives the planetary gear set by the driven shaft.