CN206498265U - A kind of magneto - Google Patents

Abstract

A kind of magneto, including electric machine casing, stator, rotor, machine shaft, end cap, fan and protective cover, the magneto also includes heat radiation rack, stator core is fixed on heat radiation rack, heat radiation rack is fixed on the inwall of electric machine casing, radiating tube is provided with heat radiation rack, radiating Bottomhole pressure has heat eliminating medium；End cap includes end cap body and protuberance, and protuberance offers axis hole, and end cap body offers the bearing cap mounting hole and bearing mounting hole communicated with axis hole；Bearing cap mounting hole, bearing mounting hole and axis hole are arranged successively from outside to inside, are provided with bearing mounting hole in bearing, bearing cap mounting hole and are installed with the bearing cap for covering bearing, and the center of bearing cap offers through hole；The inwall of bearing cap has inwardly projecting pressure ring, and pressure ring stretches into bearing mounting hole and is resisted against on the outer ring of the inwall of bearing mounting hole and bearing；The inwall compartment of terrain of bearing cap is welded with multiple oil storage blocks, and the outward flange of oil storage block upwardly extends and defines oil storage tank.

Description

A kind of magneto

Technical field

The utility model belongs to technical field of motors, is related to a kind of magneto.

Background technology

Magneto has the advantages that power density big, efficiency high and brushless, is increasingly becoming the first choice of high-speed electric expreess locomotive.Motor Various losses will be transformed into heat during work, so that magneto internal temperature is raised, and the too high easy influence of temperature To magnetic.There is serious heat dissipation problem in current solid rotor motor, solution heat dissipation problem, which is mainly used, is arranged on rotating shaft Motor internal air circulation flow when fan leaf on end ring rotates rotor, the heat that stator and rotor are produced takes casing to Distribute, but internal air stream is visibly moved to be easily obstructed, circulating property is poor, divulges information unobvious, temperature is not reduced not only Rise, also make it that motor efficiency is relatively low, service life is shortened.

In the prior art, include according to position difference of the permanent magnet of magneto on rotor：Surface-mount type, it is embedded and The various forms such as Lundell.The manufacturing process of wherein surface-mounted rotor structure is simple, and cost is low, is widely used, for high speed forever Magneto, some rotors use surface-mount type rotor, its rotor generally comprise sheath, permanent magnet, iron core, turn Axle, end plate, iron core sleeve is in rotating shaft, and permanent magnet is located on the outside of iron core, and sheath is located at permanent magnet radial outside, encases permanent magnet, End plate is located at the axial both sides of permanent magnet, and in order to reduce eddy-current loss and improve the intensity of sheath, sheath is generally nonmetallic, due to The thermal coefficient of expansion of non-metallic material is smaller, it is impossible to carry out elastic conjunction with hot jacket method, when magneto rotating speed is high, forever Magnet and non metallic sheath can be separated, and cause rotor cisco unity malfunction.Radiating of the set-up mode of permanent magnet to rotor In the presence of association influence.

In addition, motor internal temperature is raised, when these heats are transmitted on the bearing of two ends of rotor, it can make to be enclosed in bearing Interior lubricating oil leaks because temperature rise viscosity is reduced, so as to add the frictional resistance of bearing, makes the power drop of motor, seriously When can cause the damage of motor, this is those skilled in the art's urgent problem to be solved.

Utility model content

The purpose of this utility model is there is above mentioned problem for existing technology, it is proposed that a kind of magneto, is used for The heat dissipation problem of magneto is solved, service life is improved.

The purpose of this utility model can be realized by following technical proposal：

A kind of magneto, including electric machine casing, stator, rotor, machine shaft and end cap, stator and rotor are arranged on electricity The shell intracavitary of casing body, end cap is locked in the rear and front end of electric machine casing, and stator includes stator core and is arranged on stator Stator winding on iron core, rotor includes rotor core and the permanent magnet being arranged on rotor core, and machine shaft wears fixation Rotor core is simultaneously connected with end cap, and the end cap of electric machine casing rear end is externally provided with fan, and fan is coaxially fixed on machine shaft, wind Fan is externally provided with the protective cover of lattice-shaped, and protective cover is fixedly linked with end cap；The magneto also includes heat radiation rack, and heat radiation rack is in Between electric machine casing and stator, stator core is fixed on heat radiation rack, and heat radiation rack is fixed on the inwall of electric machine casing, heat radiation rack Interior to be provided with radiating tube, radiating Bottomhole pressure has heat eliminating medium, and heat eliminating medium is water or oil；End cap includes end cap body and held certainly The protuberance that lid body axially inwardly extends, protuberance offers the axis hole matched with machine shaft, and end cap body is offered The bearing cap mounting hole and bearing mounting hole communicated with axis hole；Bearing cap mounting hole, bearing mounting hole and axis hole are from outside to inside Arrange successively, be provided with bearing mounting hole in bearing and formed interference fit, bearing cap mounting hole and be installed with bearing cap, Bearing cap covers bearing, and the center of bearing cap offers the through hole that power supply machine rotating shaft is passed through, and bearing cap also has multiple install Hole, mounting hole is equably opened on the inside of the edge of bearing cap, and bearing cap by screw, fix with end cap by this body phase；Bearing cap The outer wall of outer wall and end cap body is flush；The inwall of bearing cap has inwardly projecting pressure ring, and the thickness of bearing is less than bearing The depth of mounting hole, pressure ring stretches into bearing mounting hole and is resisted against on the outer ring of the inwall of bearing mounting hole and bearing；Axle The inwall compartment of terrain for holding lid is welded with multiple oil storage blocks, and the axial length of oil storage block is less than the axial length of pressure ring, oil storage block Outward flange upwardly extends and defines oil storage tank.

In above-mentioned magneto, heat radiation rack includes internal frame and outrigger, and outrigger is sheathed on internal frame, and radiating tube is in outrigger Between internal frame and it is wrapped on internal frame；The inwall of internal frame is convexly equipped with wedge one, and the outer wall of stator core is offered and wedge One neck one matched, stator core is pressed in internal frame, and each wedge one of internal frame is caught in a corresponding card In groove one；The inwall of electric machine casing is convexly equipped with wedge two, and the outer wall of outrigger offers the neck two matched with wedge two, radiating Frame is pressed in electric machine casing, and each wedge two of electric machine casing is caught in a corresponding neck two.

In above-mentioned magneto, the quantity of neck one is twice of the quantity of wedge one, two neighboring wedge one Spacing is twice of the spacing of two neighboring neck one, and the radical length of wedge one is more than the depth of neck one, stator core Ventilation gap is formed between outer wall and the inwall of internal frame.

In above-mentioned magneto, the quantity of neck two is identical with the quantity of wedge two, outrigger and electric machine casing it is interior Wall mutually reclines.

In above-mentioned magneto, heat radiation rack also includes the end ring positioned at two ends, offer on end ring with internal frame and The relevant position of the corresponding mounting hole of outrigger, internal frame and outrigger also offers mounting hole corresponding with end ring, internal frame and outer Frame is locked with end ring.

In above-mentioned magneto, end ring is provided with outlet spout, the outlet pipe of one end of radiating tube end ring therefrom Mouthful pass and be connected with a feed tube, the other end of radiating tube passed from the outlet spout of another end ring and with a drain pipe phase Even.

In above-mentioned magneto, the outer wall of electric machine casing has fin.

Compared with prior art, the technical program has the advantage that：

1st, set between electric machine casing and stator and radiating tube, the heat produced by stator are provided with heat radiation rack, heat radiation rack Heat radiation rack can be passed to, and heat is absorbed by the heat eliminating medium in radiating tube, heat distributed by radiating tube, so that Improve the radiating efficiency of stator, it is to avoid temperature rise is too high, it is to avoid heat is accumulated on stator winding.

2nd, the quantity of stator core neck one is twice of the quantity of heat radiation rack wedge one, between each two engaging position all There is an empty neck one, be conducive to air from one end of stator core can flow to the other end by empty neck one, carry The high air permeability of stator core in itself, and be not affixed between the outer wall of stator core and the inwall of heat radiation rack and form ventilation Gap, is conducive to further improving the air permeability of stator core.

3rd, end cap is provided with oil storage block, when the lubricating oil in bearing is thrown away because of the reduction of temperature rise viscosity, due to oil storage block In the presence of lubricating oil can be got rid of in oil storage tank, collected by oil storage tank, and collected lubricating oil can be used to lubricate in the later stage.

Brief description of the drawings

Fig. 1 is the structural representation of magneto of the present utility model.

Fig. 2 is Fig. 1 close-up schematic view.

Fig. 3 is the end view of the heat radiation rack of magneto of the present utility model.

Fig. 4 is the structural representation of the heat radiation rack of magneto of the present utility model.

Fig. 5 is the structural representation of the stator core of magneto of the present utility model.

Fig. 6 is the partial enlarged drawing of the electric machine casing of magneto of the present utility model.

Fig. 7 is the circulation schematic diagram of the heat radiation rack of magneto of the present utility model.

Fig. 8 is the structural representation of the end cap of magneto of the present utility model.

Fig. 9 is the structural representation of the bearing cap of magneto of the present utility model.

Figure 10 is Fig. 9 close-up schematic view.

Figure 11 is the structural representation of the rotor core of magneto of the present utility model.

Figure 12 is the structural representation of the end plate of magneto of the present utility model.

In figure, 1, electric machine casing；2nd, stator；3rd, rotor；4th, machine shaft；5th, end cap；6th, stator core；7th, stator around Group；8th, rotor core；9th, permanent magnet；10th, fan；11st, protective cover；12nd, heat radiation rack；13rd, radiating tube；14th, internal frame；15th, it is outer Frame；16th, wedge one；17th, neck one；18th, wedge two；19th, neck two；20th, end ring；21st, outlet spout；22nd, feed tube；23rd, go out Liquid pipe；24th, fin；25th, end cap body；26th, protuberance；27th, axis hole；28th, bearing cap mounting hole；29th, bearing mounting hole； 30th, bearing；31st, bearing cap；32nd, pressure ring；33rd, oil storage block；34th, oil storage tank；35th, fluid reservoir；36th, return tank；37th, cooler Structure；38th, turn-up portion；39th, bayonet socket；40th, stage portion；41st, fixture block；42nd, anti-explosion terminal box；43rd, lead-out wire；44th, power line；45、 Rotor chamber；46th, vent passages；47th, end plate.

Embodiment

The following is specific embodiment of the utility model and with reference to accompanying drawing, further is made to the technical solution of the utility model Description, but the utility model is not limited to these embodiments.

As shown in Figures 1 to 12, the utility model provides a kind of magneto, including electric machine casing 1, stator 2, rotor 3, Machine shaft 4 and end cap 5, stator 2 and rotor 3 are arranged on the shell intracavitary of electric machine casing 1, and end cap 5 is locked in electric machine casing 1 rear and front end, stator 2 is fixedly linked with electric machine casing 1, and stator 2 includes stator core 6 and is arranged on stator core 6 Stator winding 7, stator 2 has the bore of stator of axial direction, and rotor 3 is in bore of stator and forms running clearance between stator 2.Turn Son 3 includes rotor core 8 and the permanent magnet 9 being arranged on rotor core 8, and rotor core 8 has the rotor chamber 45 of axial direction, motor Rotating shaft 4 wears rotor chamber 45 and fixed with rotor core 8 by key, and the two ends of machine shaft 4 wear end cap 5 and and end cap respectively 5 are rotatedly connected.

The end cap 5 of the rear end of electric machine casing 1 is externally provided with fan 10, and the end cap 5 of the front end of electric machine casing 1 is referred to as into drive end bearing bracket 5, will The end cap 5 of the rear end of electric machine casing 1 is referred to as rear end cap 5, and fan 10 is coaxially fixed on machine shaft 4, and fan 10 is externally provided with grid The protective cover 11 of shape, protective cover 11 surrounds fan 10, and protective cover 11 is fixedly linked with rear end cap 5, and fan 10 turns with motor The synchronous axial system of axle 4, to promote gas to flow, to playing draught effect inside electric machine casing 1, to reduce temperature rise.

It is noted that the magneto also includes heat radiation rack 12, heat radiation rack 12 be in electric machine casing 1 and stator 2 it Between, stator 2 is fixedly linked by heat radiation rack 12 with electric machine casing 1, and wherein stator core 6 is fixed on heat radiation rack 12, heat radiation rack 12 are fixed on the inwall of electric machine casing 1, and flowing in radiating tube 13, radiating tube 13 is provided with heat radiation rack 12 heat eliminating medium, dissipates Thermal medium is water or oil.When motor works, the heat produced by stator 2 can pass to heat radiation rack 12, and heat is by radiating tube Heat eliminating medium in 13 is absorbed, and then distributes heat, so as to improve the radiating efficiency of stator 2, it is to avoid temperature rise is too high.

Specifically, heat radiation rack 12 includes internal frame 14 and outrigger 15, and outrigger 15 is sheathed on internal frame 14, and radiating tube 13 is in outrigger Between 15 and internal frame 14 and it is wrapped on internal frame 14, to increase the endotherm area of radiating tube 13, is conducive to improving stator 2 Radiating efficiency.The inwall of internal frame 14 is convexly equipped with wedge 1, and the outer wall of stator core 6 offers the card matched with wedge 1 Groove 1, stator core 6 is pressed in internal frame 14, and each wedge 1 of internal frame 14 is caught in a corresponding neck In one 17, so as to realize connecting and fixing for stator core 6 and internal frame 14.

Preferably, the quantity of neck 1 is twice of the quantity of wedge 1, and the spacing of two neighboring wedge 1 is Twice of the spacing of two neighboring neck 1, therefore when stator core 6 connects with the engaging of internal frame 14, each two engaging position Between have an empty neck 1, be conducive to air to be flowed by empty neck 1 from one end of stator core 6 To the other end, stator core 6 air permeability of itself is improved.

Selectively, the radical length of wedge 1 is more than the depth of neck 1, when stator core 6 engages with internal frame 14 When connecting, it is not affixed between the outer wall of stator core 6 and the inwall of internal frame 14 and forms ventilation gap, is conducive to further carrying The air permeability of high stator core 6.

Correspondingly, the inwall of electric machine casing 1 is convexly equipped with wedge 2 18, and the outer wall of outrigger 15 is offered and the phase of wedge 2 18 The neck 2 19 matched somebody with somebody, heat radiation rack 12 is pressed in electric machine casing 1, and each wedge 2 18 of electric machine casing 1 is caught in correspondence A neck 2 19 in, so as to realize being fixedly connected for heat radiation rack 12 and electric machine casing 1.The quantity and wedge two of neck 2 19 18 quantity is identical, and the inwall of outrigger 15 and electric machine casing 1 mutually reclines, and is conducive to improving heat transfer efficiency.Electric machine casing 1 Outer wall has fin 24, and heat radiation rack 12 can transfer heat to electric machine casing 1, and outwards heat is distributed by electric machine casing 1.

Further, heat radiation rack 12 also includes the end ring 20 positioned at two ends, offers on end ring 20 and internal frame 14 and outer The relevant position of the corresponding mounting hole of frame 15, internal frame 14 and outrigger 15 also offers corresponding mounting hole, and mounting hole supplies spiral shell Nail through, internal frame 14 and outrigger 15 are locked with end ring 20, and end ring 20 is connected by screw with internal frame 14 and outrigger 15, So as to cover the two ends of heat radiation rack 12, make heat radiation rack 12 in an annular enclosed structure.

Selectively, the heat eliminating medium in radiating tube 13 can be encapsulated in radiating for non-cycling state, i.e. heat eliminating medium In pipe 13, heat eliminating medium heat absorption capacity is good, so that heat rapidly spreads from the direction of stator 2 to the direction of electric machine casing 1, it is to avoid Heat is accumulated on stator winding 7.

Preferably, end ring 20 is provided with outlet spout 21, the outlet spout 21 of one end of radiating tube 13 end ring 20 therefrom Pass and be connected with a feed tube 22, the other end of radiating tube 13 is passed from the outlet spout 21 of another end ring 20 and gone out with one Liquid pipe 23 is connected, and feed tube 22 and drain pipe 23 are at outside electric machine casing 1, and feed tube 22 is connected with fluid reservoir 35, drain pipe 23 are connected with return tank 36, cooling body 37 are provided with return tank 36, return tank 36 is connected with fluid reservoir 35, in radiating tube 13 Heat eliminating medium, which is in the state that circulates, fluid reservoir 35, contains heat eliminating medium, and the heat eliminating medium in fluid reservoir 35 is input to scattered In heat pipe 13, heat eliminating medium is absorbed after heat, is exported from drain pipe 23, and flows to return tank 36, by return tank 36 During cooling body 37, the heat of heat eliminating medium is pulled away, and the heat eliminating medium after cooling is re-entered to fluid reservoir 35, with this Formation, which is circulated, to be used.

Internal frame 14 and outrigger 15 are made of nonmagnetic Heat Conduction Material, do not affect magnetic, and heat-conductive characteristic Good, heat can be quickly transmitted to radiating tube 13 by internal frame 14, and outrigger 15 again can be by the heat on radiating tube 13 rapidly Electric machine casing 1 is passed to, realizes that the outside transmission of heat is distributed.

Preferably, end cap 5 includes end cap body 25 and the protuberance 26 axially inwardly extended from end cap body 25, protuberance 26 are formed in one toward motor internal, end cap body 25 and protuberance 26, and protuberance 26 is offered and the phase of machine shaft 4 The axis hole 27 matched somebody with somebody, the formation explosion suppresion surface of axis hole 27 of machine shaft 4 and protuberance 26.End cap body 25 is offered and the phase of axis hole 27 Logical bearing cap mounting hole 28 and bearing mounting hole 29, bearing cap mounting hole 28, bearing mounting hole 29 and axis hole 27 are from extroversion Inside arrange successively, the internal diameter size of bearing cap mounting hole 28 is more than the internal diameter size of bearing mounting hole 29, bearing mounting hole 29 Internal diameter size is more than the internal diameter size of axis hole 27.Bearing 30 and formed interference fit are installed in bearing mounting hole 29, held The outer ring of lid 5 and bearing 30 is mutually fixed.Bearing cap 31 is installed with bearing cap mounting hole 28, bearing cap 31 covers bearing 30, The center of bearing cap 31 offers the through hole that power supply machine rotating shaft 4 is passed through, and bearing cap 31 also has multiple mounting holes, and mounting hole is uniform Ground is opened on the inside of the edge of bearing cap 31, the relevant position of end cap body 25 offer with the corresponding mounting hole of bearing cap 31, Bearing cap 31 is mutually fixed by screw with end cap body 25.

The outer wall of the outer wall of bearing cap 31 and end cap body 25 is flush, to cause structure more compact.Bearing cap 31 Inwall has inwardly projecting pressure ring 32, and pressure ring 32 is shaped in end cap body 25, and the thickness of bearing 30 is installed less than bearing The depth in hole 29, pressure ring 32 stretches into bearing mounting hole 29 and is resisted against the inwall of bearing mounting hole 29 and the outer ring of bearing 30 On, pressure ring 32 is interference fitted with the formation of bearing mounting hole 29 and further fixes bearing 30.Machine shaft 4 sequentially passes through axle The through hole in hole 27, bearing hole and bearing cap 31, the front end of machine shaft 4 wears drive end bearing bracket 5, the output as machine shaft 4 End, the rear end of machine shaft 4 wears rear end cap 5, for assembling fan 10.

It is noted that the inwall compartment of terrain of bearing cap 31 is welded with multiple oil storage blocks 33, the axial direction of oil storage block 33 is long Degree has gap, so as to not interfere with bearing 30 less than the axial length of pressure ring 32 between oil storage block 33 and the end face of bearing 30 The rotation of inner ring, the outward flange of oil storage block 33 upwardly extends and defines oil storage tank 34, when the lubricating oil in bearing 30 is because of temperature rise When viscosity is reduced and thrown away, due to the presence of oil storage block 33, lubricating oil can be got rid of in oil storage tank 34, collected by oil storage tank 34, Collected lubricating oil can be used to lubricate in the later stage.

Further, end cap body 25 has axially projecting turn-up portion 38, and turn-up portion 38 integrally extends end cap body 25 end, turn-up portion 38 equably offers multiple bayonet sockets 39, motor toward electric machine casing 1, the inwall of end cap body 25 The two ends of housing 1 are stage portion 40, the end face of stage portion 40 toward end cap body 25, and stage portion 40 end face have it is many The fixture block 41 of individual protrusion, fixture block 41 is matched one by one with bayonet socket 39, and the inwall of end cap body 25 is pressed against on the end face of stage portion 40, Each fixture block 41 is caught in a corresponding bayonet socket 39, and turn-up portion 38 is pressed against on the step surface of stage portion 40, the He of turn-up portion 38 Stage portion 40 offers the mounting hole of corresponding radial direction, and turn-up portion 38 is fixed with stage portion 40 by screw lock, i.e. end cap 5 Diametrically fixed with electric machine casing 1 by screw lock, in the axial direction by engaging the fixation that connects so that end cap 5 and motor The fixation of housing 1 is more firm, and the integral rigidity of motor gets a promotion, and is conducive to reducing the noise produced during motor work.

In addition, the installation hole number in turn-up portion 38 and stage portion 40 is even number.Specifically, turn-up portion 38 and platform Installation hole number in rank portion 40 is 6 or 8, and mounting hole is distributed in uniform intervals, makes uniform force.

Wire hole is offered on electric machine casing 1, the upper surface of electric machine casing 1 is provided with anti-explosion terminal box 42, anti-explosion terminal box 42 are in the upper end of wire hole, and the lead-out wire 43 of stator winding 7 is passed and penetrated in anti-explosion terminal box 42 from wire hole, with being worn from outside The power line 44 for entering anti-explosion terminal box 42 is electrically connected.The motor also includes pedestal, and electric machine casing 1 is arranged on pedestal.In addition, electric Casing body 1 is made of non-magnetic cast aluminum alloy material；Stator winding 7 is made of resistant to elevated temperatures enamel-covered wire；Permanent magnet 9 is adopted It is made of resistant to elevated temperatures Nd-Fe-B permanent magnet material.

The center of rotor core 8 offers the rotor chamber 45 matched with machine shaft 4, and machine shaft 4 leads to rotor core 8 Cross key to fix, axial mounting groove is further opened with rotor core 8, mounting groove is in symmetrically and evenly to be distributed around rotor chamber 45, forever Magnet 9 is encapsulated in mounting groove, and is packaged with multistage permanent magnet 9 in each mounting groove, between every two adjacent mounting grooves all A vent passages 46 are offered, the quantity of permanent magnet 9 is even number, and rotor core 8 is laminated by multi-disc rotor punching, is turned The two ends of sub- iron core 8 are locked by end plate 47, offered on end plate 47 air vent that is connected with vent passages 46 and and The shaft hole 27 that rotor chamber 45 is connected, vent passages 46 improve the air permeability of internal rotor, allowed the flow to from internal rotor Flow through so as to take away the heat of internal rotor, solve the problems, such as rotor temperature rise.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Although more having used electric machine casing 1 herein；Stator 2；Rotor 3；Machine shaft 4；End cap 5；Stator core 6； Stator winding 7；Rotor core 8；Permanent magnet 9；Fan 10；Protective cover 11；Heat radiation rack 12；Radiating tube 13；Internal frame 14；Outrigger 15； Wedge 1；Neck 1；Wedge 2 18；Neck 2 19；End ring 20；Outlet spout 21；Feed tube 22；Drain pipe 23；Fin 24；End cap body 25；Protuberance 26；Axis hole 27；Bearing cap mounting hole 28；Bearing mounting hole 29；Bearing 30；Bearing cap 31；Pressure Ring 32；Oil storage block 33；Oil storage tank 34；Fluid reservoir 35；Return tank 36；Cooling body 37；Turn-up portion 38；Bayonet socket 39；Stage portion 40； Fixture block 41；Anti-explosion terminal box 42；Lead-out wire 43；Power line 44；Rotor chamber 45；Vent passages 46；The grade term of end plate 47, but not Exclude the possibility using other terms.It is of the present utility model just for the sake of more easily describing and explaining using these terms Essence；Any additional limitation is construed as all to disagree with the utility model spirit.

Claims (7)

1. a kind of magneto, including electric machine casing, stator, rotor, machine shaft and end cap, stator and rotor are arranged on motor The shell intracavitary of housing, end cap is locked in the rear and front end of electric machine casing, and stator includes stator core and is arranged on stator iron Stator winding on core, rotor includes rotor core and the permanent magnet being arranged on rotor core, and machine shaft wears fixed turn Sub- iron core is simultaneously connected with end cap, it is characterised in that the end cap of electric machine casing rear end is externally provided with fan, and fan is coaxially fixed on motor In rotating shaft, fan is externally provided with protective cover, and protective cover is fixedly linked with end cap；The magneto also includes at heat radiation rack, heat radiation rack Between electric machine casing and stator, stator core is fixed on heat radiation rack, and heat radiation rack is fixed on the inwall of electric machine casing, radiating Radiating tube is provided with frame, radiating Bottomhole pressure has heat eliminating medium, and heat eliminating medium is water or oil；End cap is including end cap body and certainly The protuberance that end cap body axially inwardly extends, protuberance offers the axis hole matched with machine shaft, and end cap body is opened up There is the bearing cap mounting hole and bearing mounting hole communicated with axis hole；Bearing cap mounting hole, bearing mounting hole and axis hole are from extroversion Inside arrange successively, be provided with bearing mounting hole in bearing and formed interference fit, bearing cap mounting hole and be installed with bearing Lid, bearing cap covers bearing, and the center of bearing cap offers the through hole that power supply machine rotating shaft is passed through, and bearing cap also has multiple peaces Hole is filled, mounting hole is equably opened on the inside of the edge of bearing cap, and bearing cap by screw fix with end cap by this body phase；Bearing cap The outer wall of outer wall and end cap body be flush；The inwall of bearing cap has inwardly projecting pressure ring, and the thickness of bearing is less than axle The depth of mounting hole is held, pressure ring stretches into bearing mounting hole and is resisted against on the outer ring of the inwall of bearing mounting hole and bearing； The inwall compartment of terrain of bearing cap is welded with multiple oil storage blocks, and the axial length of oil storage block is less than the axial length of pressure ring, oil storage block Outward flange upwardly extend and define oil storage tank.

2. magneto according to claim 1, it is characterised in that heat radiation rack includes internal frame and outrigger, outrigger is sheathed on Internal frame, radiating tube is between outrigger and internal frame and is wrapped on internal frame；The inwall of internal frame is convexly equipped with wedge one, stator core Outer wall offer the neck one matched with wedge one, stator core is pressed in internal frame, each wedge one of internal frame It is caught in a corresponding neck one；The inwall of electric machine casing is convexly equipped with wedge two, and the outer wall of outrigger is offered and wedge two The neck two matched, heat radiation rack is pressed in electric machine casing, and each wedge two of electric machine casing is caught in corresponding one In individual neck two.

3. magneto according to claim 2, it is characterised in that the quantity of neck one is the two of the quantity of wedge one Times, the spacing of two neighboring wedge one is twice of the spacing of two neighboring neck one, and the radical length of wedge one is more than neck One depth, ventilation gap is formed between the outer wall of stator core and the inwall of internal frame.

4. magneto according to claim 2, it is characterised in that the quantity of neck two is identical with the quantity of wedge two, The inwall of outrigger and electric machine casing mutually reclines.

5. magneto according to claim 2, it is characterised in that heat radiation rack also includes the end ring positioned at two ends, end ring On offer the mounting hole corresponding with internal frame and outrigger, the relevant position of internal frame and outrigger also offers corresponding with end ring Mounting hole, internal frame and outrigger are locked with end ring.

6. magneto according to claim 1, it is characterised in that end ring is provided with outlet spout, one end of radiating tube from The outlet spout of one of end ring is passed and is connected with a feed tube, and the other end of radiating tube is worn from the outlet spout of another end ring Go out and be connected with a drain pipe.

7. magneto according to claim 1, it is characterised in that the outer wall of electric machine casing has fin.