CN102303684B

CN102303684B - Electric hub

Info

Publication number: CN102303684B
Application number: CN 201110182371
Authority: CN
Inventors: 傅元才; 周永生; 秦兆量
Original assignee: CHONGQING ARD MECHATRONIC Co Ltd
Current assignee: CHONGQING ARD MECHATRONIC Co Ltd
Priority date: 2011-07-01
Filing date: 2011-07-01
Publication date: 2013-06-12
Anticipated expiration: 2031-07-01
Also published as: CN102303684A

Abstract

The invention discloses an electric hub, which comprises a motor, a hub of a combined structure, a first half shaft, a second half shaft and a gear transmission system, wherein the motor and the hub are arranged coaxially; the first half shaft and the second half shaft are mainly used for supporting the motor and the hub and arranged coaxially; the gear transmission system is used for transmitting power of the motor to the hub; and the first half shaft and the second half shaft are fixedly connected through disc structures arranged at the opposite ends, a U-shaped space for holding main components of the gear transmission system is formed between the disc structures of the first half shaft and the second half shaft, and the gear transmission system is provided with an electrically controlled two-gear shifting device. Preferably, the gear shifting device mainly consists of a push rod electromagnet, a controllable overrunning clutch structure and a control mechanism, wherein the control mechanism is provided with a maintaining mechanism used for shifting the first gear of the electric hub to the second gear and maintaining the gear or shifting the second gear of the electric hub to the first gear after the push rod electromagnet is briefly electrified and discharged. The electric hub has the advantages of capability of realizing gear shifting and speed change, low energy consumption, high response speed and long service life.

Description

A kind of electric wheel hub

Technical field

The present invention relates to a kind of electric driver, particularly a kind of electric wheel hub driven for various battery-driven cars.

Background technology

Drive configuration for battery-driven car has two kinds of forms usually, a kind of is that drive motor and wheel hub are Split type structure, drive motor is fixed on vehicle frame or axletree, by gear or chain, rotatablely moving of motor passed to drive hub, another kind is that this structure is commonly referred to wheel hub motor, motor wheel hub or electric wheel hub by drive motor and hub design all-in-one-piece integral structure.Existing a kind of integrally-built electric wheel hub, comprise motor and the wheel hub be coaxially set, the first semiaxis that is coaxially set and interfixes that is mainly used in support motor and wheel hub and the second semiaxis, for motor power being passed to the gear train assembly of wheel hub, wherein, the first semiaxis is fixedly connected with by the disk-like structure that end arranges in opposite directions with the second semiaxis, between the disk-like structure of the first semiaxis and the second semiaxis, is formed with for holding the U-shaped space of gear train assembly major part; The bearing that wheel hub is provided with by both sides coaxial rotation respectively is supported on the axle portion of the first semiaxis and the second semiaxis, the through hole that the motor pivot is provided with from the first semiaxis middle part, stretches into.Because wheel hub and rotor are the integral structures be coaxially set, the transmission gear that is positioned at wheel hub inside passes to wheel hub by rotatablely moving of rotor.It not only has compact conformation, characteristics easy for installation, and because its transmission gear is located at wheel hub inside, can provide abundant and good lubricated to gear train assembly, therefore also have advantages of that transmission efficiency is high, long service life.Therefore, the electric wheel hub of this structure obtains applying more and more widely on the electric transportation instruments such as battery-operated motor cycle, bicycle, electro-tricycle, electric four-wheel vehicle.But because this electric wheel hub does not arrange power-shift gear box, therefore existing can not shift speed change, while causing vehicle to run at high speed, road speed does not increase and wastes energy, perhaps because lacking rational low speed gear, cause vehicle to be not suitable with the complex road condition requirement, affect the road adaptive capacity of vehicle.Simultaneously, because the motor pivot of the electric wheel hub of this structure need to stretch in the air from the first semiaxis, therefore, the pivot structure size is less, and the in use easy fatigue damage of pivot, requires further improvement for this reason.

Summary of the invention

For the deficiencies in the prior art, first purpose of the present invention just is to provide a kind of electric wheel hub with shift speed change function.The second purpose of the present invention is to provide a kind of electric wheel hub of long service life.

For achieving the above object, the present invention adopts following technical scheme.

A kind of electric wheel hub, comprise the motor that is coaxially set and the wheel hub of unitized construction, the first semiaxis that is coaxially set and interfixes that is mainly used in support motor and wheel hub and the second semiaxis, for motor power being passed to the gear train assembly of wheel hub, wherein, the first semiaxis is fixedly connected with by the disk-like structure that end arranges in opposite directions with the second semiaxis, between the disk-like structure of the first semiaxis and the second semiaxis, be formed with for holding the U-shaped space of gear train assembly major part, described gear train assembly is provided with power-shift gear box.

After adopting the aforementioned techniques scheme, owing in the gear train assembly of electric wheel hub, being provided with power-shift gear box, therefore, electric wheel hub can carry out shift speed change in the work engineering, vehicle in the process of moving, navigating mate can, according to condition of road surface, be selected suitable gear to adapt to different road speed requirements, thereby realize the first purpose of the present invention.

Preferred technical scheme, described power-shift gear box is the automatically controlled machine blocking means of two gears, comprise the gear wheel shaft and the output shaft that form gear train assembly, gear wheel shaft and output shaft are rotatably supported on the disk-like structure of the first semiaxis and the second semiaxis by the bearing at two ends respectively, gear wheel shaft is driven by the one-level gear transmission by the pivot of motor, and output shaft drives wheel hub by the one-level gear transmission and rotates; Coaxially be fixed with a gear driving gear and two gear driving gears on gear wheel shaft, coaxially be provided with a gear driven gear and two gear driven gears on output shaft, one gear driving gear and a gear driven gear and two gear driving gears and the corresponding normal engagement of two gear driven gears, a gear driven gear rotating speed is lower than two gear driven gear rotating speeds; Be provided with isolator between a described gear driven gear and output shaft, output shaft can be by isolator by rotational speed such as gear driven gear drives; Be provided with the controllable over run clutch structure that external force is controlled between described two gear driven gears and output shaft, the controllable over run clutch structure is connected with control mechanism by its function unit, when by control mechanism, controlling the controllable over run clutch structure, output shaft is by the controllable over run clutch structure by rotational speed such as two gear driven gear drives, and output shaft and a gear driven gear are in surmounting state.Power-shift gear box adopt two gear electric-controlled mechanical gearshifts guarantee simple in structure, cost is low, easy to operate, be specially adapted to hand-held design traffic, the transportation meanss such as battery-operated motor cycle, Electrical Bicycle.

Further preferred technical scheme, described controllable over run clutch structure is roller or ball-type overrun clutch structure, comprise with two gear driven gears form the overdrive clutch relations cam, can form several rollers or the ball shape frictional engagement body of frictional connections with cam and two gear driven gears, cam forms dismantled and assembled being fixedly connected with output shaft by spline structure; Described function unit is connected with several rollers or ball shape frictional engagement body simultaneously, between function unit and cam, be connected with for making cam and two gear driven gears keep the elastic component of overdrive clutch state, function unit rotates to stir several frictional engagement bodies and is synchronized with the movement, and makes cam and two gear driven gears form frictional connection by several rollers or ball shape frictional engagement body.Further guarantee simple in structure, cost is low.

Preferred technical scheme, described control mechanism is for forming the magnet coil of electromagnetic attraction to function unit after switching on.Described control mechanism only is provided with magnet coil, can guarantee simple in structure, low cost of manufacture, and simultaneously, failure rate is low, use cost are low.

Preferred technical scheme, described control mechanism comprises the push rod electromagnet, and the tapered shaft with wedge shape driving surface promoted by the push rod electromagnet, tapered shaft is slidably fitted in the centre hole that output shaft is provided with, be connected with the spherical element of stirring on the wedge shape driving surface of tapered shaft, the spherical element of stirring can stretch out from the pipe tap of output shaft, spherical stirring between element and function unit is connected with leverage, leverage circumferentially rotates for the spherical radial displacement of stirring element is amplified to conversion controling part, so that cam and two gear driven gears are realized frictional connection.To stir element design glomeration body, the characteristic of utilizing globoid easily to rotate in moving radially process reaches capable of reducing friction resistance, minimizing energy consumption, improves the purpose of speed of response; Simultaneously; Owing to adopting leverage to convert spherical radial displacement amplification of stirring element to function unit, circumferentially rotate, accuracy of manufacture to function unit requires lower, save the burn in period assembled, reduced repair rate, thereby improved production efficiency, reduced manufacturing cost.

Further preferred technical scheme, described leverage is positioned at function unit one side, and the lever input end of leverage is slidably supported on spherical stirring on element, and the mouth of lever and function unit are flexibly connected; The bearing pin rotated for support lever in leverage is fixedly connected on cam, or is fixed on the reaction plate fixing with output shaft.The bearing pin rotated for support lever in leverage is fixedly connected on cam, so that compact conformation; Certainly also can be fixed on the reaction plate fixing with output shaft, to realize simple load and unload purpose.

Further preferred technical scheme, also be connected with maintaining body between described push rod electromagnet and tapered shaft, dead electricity after the energising of push rod electromagnet, maintaining body makes two gear driven gears and cam be transformed into the frictional connection state and be kept from surmounting state, or makes two gear driven gears and cam be transformed into and surmount state from the frictional connection state.Owing between control mechanism and push rod electromagnet, being provided with maintaining body, when two gear driven gears and cam when surmounting state, the push rod electromagnet obtain electric after, maintaining body makes two gear driven gears and cam be transformed into the frictional connection state from surmounting state.Now, even push rod electromagnet dead electricity, maintaining body still makes two gear driven gears and cam keep frictional connection and synchronous rotary, and does not need the push rod electromagnet is continued to energising, has saved the required energy resource consumption of electromagnet.

Preferred technical scheme further, described maintaining body comprises the rotational-like pushing body in the centre hole that is slidably fitted in output shaft, pushing external end is connected with the push rod of described push rod electromagnet, push and external week axially be penetrated with sliding tray, be combined with the guide rail be fixedly connected with output shaft in sliding tray, be provided with rotational-like holder between pushing body and described tapered shaft, between holder and pushing body or be provided with separated resilient bodies, be evenly equipped with the even number ratchet cooperatively interacted on the end face in opposite directions of holder and pushing body, the periphery of holder is evenly equipped with and axially runs through and for receiving the chute of guide rail, chute quantity is half of holder upper surface number of teeth amount, holder is slidably fitted in the centre hole of output shaft by chute and guide rail, holder can circumferentially be rotated after getaway, described guide rail is provided with the leader that the driving surface with the ratchet of holder adapts towards the end of holder, described sliding tray is positioned at the root at the pushing any tooth driving surface of the body back side, and chute is positioned at the driving surface middle part of holder respective teeth, the wedge shape driving surface of described tapered shaft is provided with the smooth section of a setpoint distance or is connected with the maintenance elastic body between tapered shaft and holder, so that holder is after its chute getaway, two gear driven gears and cam are all the time in the frictional connection state, be provided with the return elastic body between the centre hole bottom of tapered shaft and output shaft.

When the outer end of aforementioned pushing body is fixedly connected with the push rod of push rod electromagnet, the pushing body is pulled and is exited by the push rod of push rod electromagnet; When the outer end of pushing body only forms the flexible connection of end contact with the push rod of push rod electromagnet, between holder and pushing body, establish separated resilient bodies, so that when the push rod of push rod electromagnet exits, the pushing body exits with the push rod of push rod electromagnet under the separated resilient bodies effect.Guarantee simple in structure, dependable performance.

Further preferred technical scheme again, described separated resilient bodies, return elastic body or to keep elastic body be any one in cushion, belleville spring, Compress Spring.Only need to there is enough axial deflections and elastic force get final product, draw materials extensive, easily manufactured.

Further preferred technical scheme again, the push rod front end of described push rod electromagnet also is connected with lever conversion device, and lever conversion device is for by the motion of push rod electromagnet push-rod commutation, pushing body, holder and the separated resilient bodies by maintaining body passes to tapered shaft.Can make the push rod electromagnet arrange by parallel mode arranged side by side with output shaft, to save installing space, reduce the volume of electric wheel hub, reduce installing space, improve applicability.

Preferred technical scheme, the pivot of described motor in a tubular form, fix by its electric machine casing and the first semiaxis by motor, and pivot is rotatably connected on the first half shafts section by coaxial bearing, and pivot stretches in wheel hub; Described gear train assembly comprises motor gear, gear wheel, and motor gear is fixed on the pivot front end, and motor gear is engaged with input gear, and input gear is fixed on gear wheel shaft; Gear wheel is fixed on the second end cap of wheel hub, and gear wheel is rotatably supported in the second half shafts section by coaxial bearing, the output gear engagement on gear wheel and output shaft; Described wheel hub also is rotatably supported on pivot by the first end cap and coaxial bearing.The tubular pivot sectional dimension is large, intensity is high, good rigidly, thereby is conducive to extend the service life of electric wheel hub, thereby realizes second purpose of the present invention.

Further preferred technical scheme, described gear wheel is the gear with buffer structure, comprises gear body, cushion collar, buffering body, and gear body ring set is in the second half shafts section, and the gear body is evenly distributed in a plurality of holes; Described buffering body, between gear body and wheel hub, is extruded with the buffer shaft that stretches into the cushion collar hole on the buffering body, and the buffering body is fixedly connected with wheel hub, and the buffering body is rotatably supported in the second half shafts section by coaxial bearing; Described cushion collar is made by the material with damping performance, and cushion collar is filled between a plurality of hole inwalls on buffer shaft periphery and gear body, and cushion collar is stopped by cover plate in case, along the buffer shaft slippage, cover plate is fixedly connected with the buffering body by screw.Can effectively eliminate gearshift with the gear wheel of buffer structure and impact, the fatigue life that is conducive to improve gear wheel, thus further extend service life of electric wheel hub.

The present invention's beneficial effect compared with prior art is, can realize shift speed change, and energy consumption is low, fast response time, long service life, applied widely.

The accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention 1.

Fig. 2 is gear wheel structural representation of the present invention.

Fig. 3 is the left view of Fig. 2 of the present invention.

Fig. 4 is the right elevation of Fig. 2 of the present invention.

Fig. 5 is the structural representation of the embodiment of the present invention 2.

Fig. 6 is the A section enlarged drawing in Fig. 5 of the present invention.

Fig. 7 is B in Fig. 6 of the present invention-B cutaway view.

Fig. 8 is C in Fig. 6 of the present invention-C cutaway view.

Fig. 9 is D in Fig. 8 of the present invention-D cutaway view.

Figure 10 is the structural representation in the embodiment of the present invention 3.

Figure 11 is the E section enlarged drawing in Figure 10 of the present invention.

Figure 12 is the structural representation of the embodiment of the present invention 4.

Figure 13 is the F section enlarged drawing in Figure 12 of the present invention.

Figure 14 is G in Figure 13 of the present invention-G cutaway view.

Figure 15 is the structural representation of the embodiment of the present invention 5.

Figure 16 is the H section enlarged drawing in Figure 12 of the present invention.

Figure 17 is L in Figure 13 of the present invention-L cutaway view.

Figure 18 is the maintaining body state change map in the present invention.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is further illustrated, but therefore do not limit the present invention among described scope of embodiments.

embodiment 1referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of electric wheel hub, comprise the motor 1 that is coaxially set and the wheel hub 2 of unitized construction, be mainly used in the first semiaxis 3 that is coaxially set and interfixes and second semiaxis 4 of support motor 1 and wheel hub 2, for the gear train assembly to wheel hub 2 by motor 1 transmission of power, wherein, the first semiaxis 3 is fixedly connected with by the disk-like structure that end arranges in opposite directions with the second semiaxis 4, between the disk-like structure of the first semiaxis 3 and the second semiaxis 4, be formed with for holding the U-shaped space of gear train assembly major part, described gear train assembly is provided with power-shift gear box.

Described power-shift gear box is the automatically controlled gearshift of two gears, comprise the gear wheel shaft 65 and the output shaft 66 that form gear train assembly, gear wheel shaft 65 and output shaft 66 are rotatably supported on the disk-like structure of the first semiaxis 3 and the second semiaxis 4 by the bearing at two ends respectively, gear wheel shaft 65 is driven by the one-level gear transmission by the pivot 11 of motor 1, and output shaft 66 drives wheel hub 2 by the one-level gear transmission and rotates; Coaxially be fixed with a gear driving gear 61 and two gear driving gears 62 on gear wheel shaft 65, coaxially be provided with a gear driven gear 63 and two gear driven gears 64 on output shaft 66, one gear driving gear 61 and a gear driven gear 63 and two gear driving gears 62 and the corresponding normal engagement of two gear driven gears 64, gear driven gear 63 rotating speeds are lower than two gear driven gear 64 rotating speeds; Be provided with isolator 63a between a described gear driven gear 63 and output shaft 66, output shaft 66 can be by isolator 63a by rotational speed such as gear driven gear 63 drives; Be provided with the controllable over run clutch structure that external force is controlled between described two gear driven gears 64 and output shaft 66, the controllable over run clutch structure is connected with control mechanism by its function unit 69, when by control mechanism, controlling the controllable over run clutch structure, output shaft 66 is by the controllable over run clutch structure by rotational speed such as two gear driven gear 64 drives, and output shaft 66 and a gear driven gear 63 are in surmounting state.

Described controllable over run clutch structure is roller controllable overrunning clutch structure, comprise with two gear driven gears 64 form the overdrive clutch relations cam 67, can form several roller shape frictional engagement bodies 68 of frictional connections with cam 67 and two gear driven gears 64, cam 67 forms dismantled and assembled being fixedly connected with output shaft 66 by spline structure; Described function unit 69 is connected with several roller shapes or spherical shape frictional engagement body 68 simultaneously, between function unit 69 and cam 67, be connected with for making cam 67 and two gear driven gears 64 keep the elastic component 87 of overdrive clutch state, function unit 69 rotates to stir several roller shape frictional engagement bodies 68 and is synchronized with the movement, and makes cam 67 and two gear driven gears 64 form frictional connection by several roller shape frictional engagement bodies 68.

Described elastic component 87 is Compress Spring.

Described control mechanism is for forming the magnet coil 70 of electromagnetic attractions to function unit 69 after switching on.

In a tubular form, motor 1 is fixing by its electric machine casing and the first semiaxis 3 for the pivot 11 of described motor 1, and pivot 11 is rotatably connected on the first semiaxis 3 bar sections by coaxial bearing, and pivot 11 stretches in wheel hub 2; Described gear train assembly comprises motor gear 79, gear wheel, and motor gear 79 is fixed on pivot 11 front ends, and motor gear 79 is engaged with input gear 80, and input gear 80 is fixed on gear wheel shaft 65; Gear wheel is fixed on the second end cap 22 of wheel hub 2, and gear wheel is rotatably supported in the second semiaxis 4 bar sections by coaxial bearing, output gear 82 engagements on gear wheel and output shaft 66; Described wheel hub 2 also is rotatably supported on pivot 11 by the first end cap 21 and coaxial bearing.

Described gear wheel is the gear with buffer structure, comprises gear body 83, cushion collar 84, buffering body 85, and gear body 83 ring sets are in the second semiaxis 4 bar sections, and gear body 83 is evenly distributed in a plurality of holes; Described buffering body 85, between gear body 83 and wheel hub 2, is extruded with the buffer shaft 85a that stretches into cushion collar 84 holes on buffering body 85, and buffering body 85 is fixedly connected with wheel hub 2, and buffering body 85 is rotatably supported in the second semiaxis 4 bar sections by coaxial bearing; Described cushion collar 84 is made by the rubber with damping performance, cushion collar 84 is filled between a plurality of hole inwalls on buffer shaft 85a periphery and gear body 83, cushion collar 84 is stopped by cover plate 86 in case, along buffer shaft 85a slippage, cover plate 86 is fixedly connected with buffering body 85 by screw.

The present embodiment overrun clutch structure can be also the ball-type overrun clutch structure, and described frictional engagement body 68 is ball.

embodiment 2referring to Fig. 5, Fig. 6, described control mechanism comprises push rod electromagnet 71, and the tapered shaft with wedge shape driving surface 72 promoted by push rod electromagnet 71, tapered shaft 72 is slidably fitted in the centre hole 66a that output shaft 66 is provided with, be connected with the spherical element 91 of stirring on the wedge shape driving surface of tapered shaft 72, the spherical element 91 of stirring can stretch out from the pipe tap 66b of output shaft 66, spherical stirring between element 91 and function unit 69 is connected with leverage, leverage circumferentially rotates for the spherical radial displacement of stirring element 91 is amplified to conversion controling part 69, so that cam 67 and two gear driven gears 64 are realized frictional connection.

Also be connected with maintaining body between described push rod electromagnet 71 and tapered shaft 72, dead electricity after 71 energisings of push rod electromagnet, maintaining body makes two gear driven gears 64 be transformed into the frictional connection state and be kept from surmounting state with cam 67, or makes two gear driven gears 64 be transformed into and surmount state from the frictional connection state with cam 67.

Described maintaining body comprises the rotational-like pushing body 73 in lock tube 92 endoporus in the centre hole 66a that is slidably fitted in output shaft 66, pushing body 73 outer ends are by the promotion of described push rod electromagnet 71, pushing body 73 peripheries are evenly equipped with 4 and axially are penetrated with sliding tray 73a, in sliding tray 73a, cooperation all has guide rail 74, guide rail 74 is located at lock tube 92 inwalls, guide rail 74 is fixedly connected with output shaft 66 by lock tube 92, be provided with rotational-like holder 75 between pushing body 73 and described tapered shaft 72, be provided with separated resilient bodies 76 between holder 75 and pushing body 73, be evenly equipped with 8 ratchets of even number that cooperatively interact on the end face in opposite directions of holder 75 and pushing body 73, the periphery of holder 75 is evenly equipped with 4 and axially runs through and for receiving the chute 75a of guide rail 74, holder 75 is slidably fitted in the centre hole 66a of output shaft 66 by chute 75a and guide rail 74, holder 75 can circumferentially be rotated after getaway 74, described guide rail 74 is provided with the leader that the driving surface with the ratchet of holder 75 adapts towards the end of holder 75, described sliding tray 73a is positioned at the root at pushing body 73 any tooth driving surface back sides, and chute 75a is positioned at the driving surface middle part of holder 75 respective teeth, the wedge shape driving surface of described tapered shaft 72 is provided with the smooth section 72a of a setpoint distance so that holder 75 is after its chute 75a getaway 74, two gear driven gears 64 with cam 67 all the time in the frictional connection state, be provided with return elastic body 78 between the centre hole 66a bottom of tapered shaft 72 and output shaft 66.Establish lock tube 92 at output shaft 66 and pushing body 73, so that guide rail 74 is located to lock tube 92, replaceable lock tube 92 after guide rail 74 wearing and tearing, to extend the service life of maintaining body, thereby improve the service life of electric wheel hub.

Described separated resilient bodies 76, return elastic body 78 are Compress Spring.

Referring to Fig. 7, Fig. 8, described leverage is provided with two covers, two cover leverage circumference uniform distributions are on the reaction plate 90 of function unit 69 1 sides, reaction plate 90 is provided with for hiding the breach of leverage, reaction plate 90 is fixedly connected on output shaft 66 removably by spline, leverage is fixedly connected on reaction plate 90 for the bearing pin 89 of rotational support lever 88, lever 88 input ends are slidably supported on spherical stirring on element 91, and the mouth of lever 88 is provided with rolling post 88a and slides and be engaged in rotationally in the chute that function unit 69 is provided with.

Referring to Fig. 9, the push rod front end of described push rod electromagnet 71 also is connected with lever conversion device 71a, and lever conversion device 71a is for by the motion of push rod electromagnet 71 push rods commutation, pushing body 73, holder 75 and the separated resilient bodies 76 by maintaining body passes to tapered shaft 72.

All the other structures of the present embodiment are identical with embodiment 1, do not repeat them here.

embodiment 3referring to Figure 10, Figure 11, do not establish smooth section 72a on the wedge shape driving surface of described tapered shaft 72, be connected with between tapered shaft 72 and holder 75 and keep elastic body 77, keep elastic body 77 to make holder 75 after its chute 75a getaway 74, two gear driven gears 64 and cam 67 are all the time in the frictional connection state.

Described maintenance elastic body 77 is Compress Springs.

All the other structures of the present embodiment are identical with embodiment 2, do not repeat them here.

embodiment 4referring to Figure 12, Figure 13, Figure 14, described function unit 69 inboards are provided with breach, leverage is arranged in the breach of function unit 69, lever 88 input ends of leverage are slidably supported on spherical stirring on element 91, the mouth of lever 88 is slidably supported on the shifting shaft 93 be fixedly connected with function unit 69, and the bearing pin 89 rotated for support lever 88 in leverage is fixedly connected on cam 67 respective side end faces.

All the other structures of the present embodiment are identical with embodiment 3, do not repeat them here.

embodiment 5referring to Figure 15, Figure 16, Figure 17, a kind of electric wheel hub, described controllable over run clutch structure is the two retainer overriding clutchs of Wedge-type, comprise the cam 67 that forms the overdrive clutch relation with two gear driven gears 64, can form with cam 67 and two gear driven gears 64 several Wedge-type frictional engagement bodies 68 of frictional connection, Wedge-type frictional engagement body 68 is controlled by the first retainer 93 and the second retainer 94, the first retainer 93 is positioned at the second retainer 94 inside, the first retainer 93 is fixedly connected with cam 67, the second retainer 94 1 ends are fixedly connected with by control panel 95, the second retainer 94 and control panel 95 formation control parts 69, the first retainer 93 and the spring steel band be provided with between cam 67 is fixedly connected with form the elastic component 87 of controllable overrunning clutch, elastic component 87 makes cam 67 and two gear driven gears 64 keep the overdrive clutch state, function unit 69 rotates to stir several Wedge-type frictional engagement bodies 68 and is synchronized with the movement, make several Wedge-type frictional engagement bodies 68 and cam 67 and two gear driven gears 64 form frictional connection.

Controllable over run clutch structure in above-described embodiment 1 and 2 can be also the ball-type controllable overrunning clutch, and described frictional engagement body 68 is ball.

working processthe embodiment 2 of below take carries out brief description to working process of the present invention as example.

Referring to Fig. 5, electrical power, pivot 11 rotations are by motor gear 79, input gear 80 driven gear axles 65 rotate, be fixed on the gear of one on gear wheel shaft 65 driving gear 61, two gear driving gears 62 rotate with gear wheel shaft 65, corresponding with one the gear driving gear 61, two gear driving gears 62 a gear driven gear 63 and the two gear driven gears 64 of normal engagement respectively rotate, one gear driven gear 63 drives output shaft 66 by isolator 63a and rotates, now, tapered shaft 72 under return elastic body 78 effect in outer end, the spherical element 91 of stirring is at elastic component 87, radially retract to minimum position under function unit 69 and leverage effect, frictional engagement body 68 and two gear driven gears 64 break away from, it is that two gear driven gears 64 form and surmount state with output shaft 66 that two gear driven gears 64 surmount state with function unit 69 formation, the pushing body 73 of maintaining body, holder 75 under separated resilient bodies 76 effect in released state, output shaft 66 is by output gear 82, gear wheel drives wheel hub 2 and rotates, thereby realize that wheel hub drives.

Referring to Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 18, two gear driven gears 64 with cam 67 when surmounting mode of operation, pushing body 73 is with holder 75 in released state, and guide rail 74 is arranged in the sliding tray 73a of pushing body 73 and the chute 75a of holder 75 simultaneously, as a state in Figure 18.If while now needing gearshift to make output shaft 66 and two gear driven gear 64 synchronous rotaries, connect push rod electromagnet 71 power supplys, push rod electromagnet 71 promotes pushing body 73 by lever conversion device 71a and moves, the elastic force that pushing body 73 overcomes separated resilient bodies 76 approaches holder 75, the two in opposite directions the ratchet of end form local contact on the drive side top, form the b state in Figure 18, holder 75 himself chute 75a and guide rail 74 restriction under with pushing body 73, move and the elastic force that overcomes return elastic body 78 promotes tapered shaft 72 and moves, the spherical element 91 of stirring radially outward moves along output shaft 66 under the effect of tapered shaft 72, leverage is under the effect of elastic element 87 and function unit 69, the input end of lever 88 contacts with the spherical element 91 of stirring, spherical lever 88 mouths of element 91 by leverage of stirring rotate function unit 69, thereby and then realize the frictional connection of two gear driven gears 64 and cam 67, reach the purpose of output shaft 66 and two gear driven gear 64 synchronous rotaries.After holder 75 getaways 74, holder 75 is under tapered shaft 72 reaction force acts, holder 75 forms complete the contact with the drive side that pushing body 73 matches, corresponding holder 75 rotates to an angle by direction initialization, form the c state in Figure 18, holder or continuation are moved with pushing body 73.The smooth section be provided with due to the work lozenges of tapered shaft 72, therefore two gear driven gears 64 continue in the frictional connection state with cam 67.Now, turn-off the power supply of push rod electromagnet 71, push rod electromagnet 71 dead electricity push rods exit, pushing body 73 exits with push rod under separated resilient bodies 76 effects, pushing body 73 is thrown off and is connected with the contacted tooth of holder 75 section, holder 75 moves with tapered shaft 72 under the effect of return elastic body 78, when holder 75 front end tooth top sections with after the leader of guide rail 74 contacts, holder 75 is rotated again by direction initialization, until the guide portion tap of guide rail 74 holds holder 75 drive side roots, form the d state in Figure 18, and stop that with this holder 75 exits, to keep two gear driven gears 64 and cam 67 to keep the frictional connection state.Because sliding tray 73a is positioned at the root that pushes body 73 any tooth driving surface back sides, chute 75a is positioned at the driving surface middle part of holder 75 respective teeth, and now, the total angle that holder 75 turns over is greater than corresponding angle of tooth of end-tooth.When needs return to two gear driven gears 64 and cam 67 to surmount mode of operation, again connect push rod electromagnet 71 power supplys, push rod electromagnet 71 Work Promote pushing bodies 73 move, holder 75 and pushing body 73 overcome the elastic force of separated resilient bodies 76, again form local contact on the drive side matched, the position that this time local contact is staggered more than a tooth with last contacting, form the e state in Figure 18, and holder 75 overcomes the elastic force of return elastic body 78 and moves together with tapered shaft 72 under pushing body 73 promotes, perhaps overcome and keep the elastic force of elastic body 77 to move towards tapered shaft 72 directions, after holder 75 getaways 74, under tapered shaft 72 reaction force acts, holder 75 forms complete the contact with the drive side that pushing body 73 matches, corresponding holder 75 rotates to an angle again by direction initialization, form the f state in Figure 18, holder 75 or continuation are moved with pushing body 73.Now, turn-off push rod electromagnet 71 power supplys, push rod electromagnet 71 dead electricity push rods exit, pushing body 73 exits with push rod under separated resilient bodies 76 effects, pushing body 73 is thrown off and is connected with the contacted tooth of holder 75 section, holder 75 moves towards pushing body 73 directions with tapered shaft 72 under the effect of return elastic body 78, when holder 75 front end tooth top sections with after the leader of guide rail 74 contacts, holder 75 is rotated again by direction initialization, until the chute 75a of the leader of guide rail 74 and holder 75 aligns, form the g state in Figure 18, now, holder 75 has totally been rotated the angle of two teeth, under the promotion of tapered shaft 72, holder 75 exits along guide rail 74, return to a state in Figure 18, corresponding function unit 69 rotates towards aforementioned opposite sense under elastic element 87 effects, the spherical element 91 of stirring is under the leverage effect, along tapered shaft 72 driving surfaces rollback radially, return to and surmount state until two gear driven gears 64 break away from the frictional connection state with cam 67.At guide rail 74, break away from the whole process of holder 75 chute 75a, because the wedge shape driving surface of tapered shaft 72 is provided with the smooth section of a setpoint distance, therefore, two gear driven gears 64 remain the frictional connection state with cam 67.

The effect of the smooth section that the maintenance elastic body 77 in embodiment 3 is set with tapered shaft 72 in embodiment 1 is identical, during rubbing at two gear driven gears 64 and cam 67, absorbs moving axially of holder 75.Obviously, the elastic force of maintenance elastic body 77 must be greater than the elastic force of return elastic body 78.After holder 75 getaways 74, under the resilient force that keeps elastic body 77, holder 75 forms complete the contact with the drive side that pushing body 73 matches.

Although combine accompanying drawing above and described embodiments of the present invention, those of ordinary skill in the art also can recognize in the scope to claims and makes various variations or modification.These modifications and variations are interpreted as within scope of the present invention and intention.

Claims

1. an electric wheel hub, comprise the motor (1) that is coaxially set and the wheel hub (2) of unitized construction, be mainly used in the first semiaxis (3) that is coaxially set and interfixes and second semiaxis (4) of support motor (1) and wheel hub (2), for the gear train assembly to wheel hub (2) by motor (1) transmission of power, wherein, the first semiaxis (3) is fixedly connected with by the disk-like structure that end arranges in opposite directions with the second semiaxis (4), between the disk-like structure of the first semiaxis (3) and the second semiaxis (4), be formed with for holding the U-shaped space of gear train assembly major part, it is characterized in that: described gear train assembly is provided with power-shift gear box, described power-shift gear box is the automatically controlled gearshift of two gears, comprise the gear wheel shaft (65) and the output shaft (66) that form gear train assembly, gear wheel shaft (65) and output shaft (66) are rotatably supported on the disk-like structure of the first semiaxis (3) and the second semiaxis (4) by the bearing at two ends respectively, gear wheel shaft (65) is driven by the one-level gear transmission by the pivot (11) of motor (1), and output shaft (66) drives wheel hub (2) by the one-level gear transmission and rotates, coaxially be fixed with a gear driving gear (61) and two gear driving gears (62) on gear wheel shaft (65), coaxially be provided with a gear driven gear (63) and two gear driven gears (64) on output shaft (66), one gear driving gear (61) keeps off with a gear driven gear (63) and two gear driving gears (62) and two that driven gear (64) is corresponding often to be meshed, and one keeps off driven gear (63) rotating speed lower than two gear driven gear (64) rotating speeds, be provided with isolator (63a) between a described gear driven gear (63) and output shaft (66), output shaft (66) can pass through isolator (63a) by rotational speed such as gear driven gear (63) drives, be provided with the controllable over run clutch structure that external force is controlled between described two gear driven gears (64) and output shaft (66), the controllable over run clutch structure is connected with control mechanism by its function unit (69), when by control mechanism, controlling the controllable over run clutch structure, output shaft (66) is by the controllable over run clutch structure by rotational speed such as two gear driven gear (64) drives, and output shaft (66) and keeps off driven gear (63) in surmounting state.

2. electric wheel hub according to claim 1, it is characterized in that: described controllable over run clutch structure comprise with two gear driven gears (64) form the overdrive clutch relations cam (67), can with several frictional engagement bodies (68) of cam (67) and two gear driven gears (64) formation frictional connections, cam (67) forms dismantled and assembled being fixedly connected with output shaft (66) by spline structure; Described function unit (69) is connected with several frictional engagement bodies (68) simultaneously, between function unit (69) and cam (67), be connected with for making cam (67) and two gear driven gears (64) keep the elastic component (87) of overdrive clutch state, function unit (69) rotates and is synchronized with the movement to stir several frictional engagement bodies (68), makes cam (67) and two gear driven gears (64) form frictional connection by several frictional engagement bodies (68).

3. electric wheel hub according to claim 1 is characterized in that: described control mechanism forms the magnet coil (70) of electromagnetic attraction to function unit (69) after for energising.

4. electric wheel hub according to claim 1, it is characterized in that: described control mechanism comprises push rod electromagnet (71), and the tapered shaft with wedge shape driving surface (72) promoted by push rod electromagnet (71), tapered shaft (72) is slidably fitted in the centre hole (66a) that output shaft (66) is provided with, be connected with the spherical element (91) of stirring on the wedge shape driving surface of tapered shaft (72), the spherical element (91) of stirring can stretch out from the pipe tap (66b) of output shaft (66), spherical stirring between element (91) and function unit (69) is connected with leverage, leverage circumferentially rotates for the spherical radial displacement of stirring element (91) is amplified to conversion controling part (69), so that cam (67) is realized frictional connection with two gear driven gears (64).

5. electric wheel hub according to claim 4, it is characterized in that: described leverage is positioned at function unit (69) one sides, the lever of leverage (88) input end is slidably supported on spherical stirring on element (91), and the mouth of lever (88) and function unit (69) are flexibly connected; The bearing pin (89) rotated for support lever (88) in leverage is fixedly connected on cam (67), or is fixed on the reaction plate (90) fixing with output shaft (66).

6. electric wheel hub according to claim 4, it is characterized in that: described function unit (69) inboard is provided with breach, leverage is arranged in the breach of function unit (69), the lever of leverage (88) input end is slidably supported on spherical stirring on element (91), it is upper that the mouth of lever (88) is slidably supported on the shifting shaft (93) be fixedly connected with function unit (69), and the bearing pin (89) rotated for support lever (88) in leverage is fixedly connected on cam (67) respective side end face.

7. electric wheel hub according to claim 4, it is characterized in that: between described push rod electromagnet (71) and tapered shaft (72), also be connected with maintaining body, dead electricity after push rod electromagnet (71) energising, maintaining body makes two gear driven gears (64) and cam (67) be transformed into the frictional connection state and be kept from surmounting state, or makes two gear driven gears (64) and cam (67) be transformed into and surmount state from the frictional connection state.

8. electric wheel hub according to claim 7, it is characterized in that: described maintaining body comprises the rotational-like pushing body (73) in the centre hole (66a) that is slidably fitted in output shaft (66), pushing body (73) outer end is connected with the push rod of described push rod electromagnet (71), pushing body (73) peripheral, axial is penetrated with sliding tray (73a), be combined with the guide rail (74) be fixedly connected with output shaft (66) in sliding tray (73a), be provided with rotational-like holder (75) between pushing body (73) and described tapered shaft (72), between holder (75) and pushing body (73) or be provided with separated resilient bodies (76), be evenly equipped with the even number ratchet cooperatively interacted on the end face in opposite directions of holder (75) and pushing body (73), the periphery of holder (75) is evenly equipped with and axially runs through and the chute (75a) for receiving guide rail (74), chute (75a) quantity is half of holder (75) upper surface number of teeth amount, holder (75) is slidably fitted in the centre hole (66a) of output shaft (66) by chute (75a) and guide rail (74), holder (75) can circumferentially be rotated after getaway (74), described guide rail (74) is provided with the leader that the driving surface with the ratchet of holder (75) adapts towards the end of holder (75), described sliding tray (73a) is positioned at pushing body (73) root at the tooth driving surface back side arbitrarily, and chute (75a) is positioned at the driving surface middle part of holder (75) respective teeth, the wedge shape driving surface of described tapered shaft (72) is provided with the smooth section (72a) of a setpoint distance or is connected with between tapered shaft (72) and holder (75) and keeps elastic body (77), so that holder (75) is after its chute (75a) getaway (74), two gear driven gears (64) with cam (67) all the time in the frictional connection state, be provided with return elastic body (78) between centre hole (66a) bottom of tapered shaft (72) and output shaft (66).

9. electric wheel hub according to claim 8, it is characterized in that: described separated resilient bodies (76) is any one in cushion, belleville spring, Compress Spring; Described return elastic body (78) is any one in cushion, belleville spring, Compress Spring; Described maintenance elastic body (77) is any one in cushion, belleville spring, Compress Spring.

10. electric wheel hub according to claim 8, it is characterized in that: the push rod front end of described push rod electromagnet (71) also is connected with lever conversion device (71a), and for the motion by push rod electromagnet (71) push rod commutation, pushing body (73), holder (75) and the separated resilient bodies (76) by maintaining body passes to tapered shaft (72) to lever conversion device (71a).

11. according to the described electric wheel hub of any one claim in claim 1～10, it is characterized in that: the pivot (11) of described motor (1) in a tubular form, motor (1) is fixing by its electric machine casing and the first semiaxis (3), pivot (11) is rotatably connected on the first semiaxis (3) bar section by coaxial bearing, and pivot (11) stretches in wheel hub (2); Described gear train assembly comprises motor gear (79), gear wheel, and motor gear (79) is fixed on pivot (11) front end, and motor gear (79) is engaged with input gear (80), and input gear (80) is fixed on gear wheel shaft (65); Gear wheel is fixed on second end cap (22) of wheel hub (2), and gear wheel is rotatably supported in the second semiaxis (4) bar section by coaxial bearing, output gear (82) engagement on gear wheel and output shaft (66); Described wheel hub (2) also is rotatably supported on pivot (11) by the first end cap (21) and coaxial bearing.

12. electric wheel hub according to claim 11, it is characterized in that: described gear wheel is provided with buffer structure, comprise gear body (83), cushion collar (84), buffering body (85), gear body (83) ring set is in the second semiaxis (4) bar section, and gear body (83) is evenly distributed in a plurality of holes; Described buffering body (85) is positioned between gear body (83) and wheel hub (2), be extruded with the buffer shaft (85a) that stretches into cushion collar (84) hole on buffering body (85), buffering body (85) is fixedly connected with wheel hub (2), and buffering body (85) is rotatably supported in the second semiaxis (4) bar section by coaxial bearing; Described cushion collar (84) is made by the material with damping performance, and cushion collar (84) is filled between a plurality of hole inwalls on buffer shaft (85a) periphery and gear body (83).