CN209642486U - A kind of hollow ultrathin outer rotor harmonic reduction all-in-one machine - Google Patents

Abstract

The utility model discloses a kind of hollow ultrathin outer rotor harmonic reduction all-in-one machines, including casing, are the hollow barrel structure of a multi-stag, and casing tail end is closed with a rear end cap；Hollow shaft, through being arranged in casing axis center, hollow shaft tail end is fixed on rear end cap, and a stator is arranged on hollow shaft axle body；Harmonic speed reducer is coaxially mounted on casing front bulkhead, is extended a rotating circular disc into casing from the wave of harmonic speed reducer hair device side wall, is provided with several permanent magnets on rotating circular disc internal perisporium, permanent magnet is distributed in stator periphery；And flange, it is coaxially connected on the output end of harmonic speed reducer.The utility model is arranged hollow shaft and provides internal cabling by the way that the external rotor electric machine of customization to be embedded into inside wave producer, so that the particularly suitable joint position in service class robot of the utility model.

Description

A kind of hollow ultrathin outer rotor harmonic reduction all-in-one machine

Technical field

The utility model relates at joint of robot with motor, retarder and the integrated machine drive area of drive system, It is particularly applied to the hollow ultrathin outer rotor harmonic reduction all-in-one machine driven at service class joint of robot.

Background technique

Harmonic reduction all-in-one machine is the driving executive component for being used to drive robot link motion at joint of robot, it is The novel robot tailored version that servo motor, harmonic speed reducer, drive system are integrated drives actuator.Currently, string There are mainly two types of forms for the composed structure of connection form harmonic reduction all-in-one machine:

1, standard servo motor and harmonic speed reducer are combined into harmonic reduction all-in-one machine, pass through connecting flange and other connections Often length is made long with the combined this structure of harmonic speed reducer for mechanism, may be only available for industrial robot etc. pair The insensitive field of harmonic reduction all-in-one machine length；

2, rimless motor module is combined with harmonic speed reducer, and this structure can shorten one etc. than 1 scheme in length Grade, but for some service class robot industries very stringent to length requirement for, both the above scheme is not able to satisfy still It is required that.

Utility model content

One purpose of the utility model is to solve at least the above problems, and provide the advantages of at least will be described later.

There are one purposes to be to provide a kind of hollow ultrathin outer rotor harmonic reduction all-in-one machine for the utility model, has knot The advantages that structure is simple, and design rationally, is easily installed, and stability is good.

In order to realize the purpose of this utility model and further advantage, a kind of hollow ultrathin outer rotor harmonic reduction is provided All-in-one machine, comprising:

Casing is the hollow barrel structure of a multi-stag, and the casing tail end is closed with a rear end cap；

Hollow shaft, through being arranged in the casing axis center, the hollow shaft tail end is fixed on the rear end cap On, a stator is set on the hollow shaft axle body；

Harmonic speed reducer is coaxially mounted on the casing front bulkhead, sends out device side wall from the wave of the harmonic speed reducer On a rotating circular disc is extended into the casing, be provided with several permanent magnets on the rotating circular disc internal perisporium, it is described forever Magnet is distributed in the stator periphery；And

Flange, it is coaxially connected on the output end of the harmonic speed reducer.

Preferably, the tail end of the casing opens wide, the circumferential projecting inward setting one of casing outside the rear end cap front bulkhead First annular boss, and the outer diameter of the first annular boss is consistent with the internal diameter that the casing tail end is open, the casing tail End cap is located at the first annular boss periphery；One first is opened up on the rear end cap on the inside of the first annular boss periphery Groove, is embedded one first sealing ring in first groove, first sealing ring be folded in the casing tail end with it is described Between the contact surface of rear end cap.

Preferably, the rear end cap axis center opens up on the tail end wall of the first through hole through a first through hole is opened up One first annular concave station, the first annular concave station and the first through hole arranged coaxial, hollow one card of shaft tail end setting Disk, the chuck fitting are embedded in the first annular concave station；The chuck periphery be spaced apart be equipped with the second through-hole, it is described in Empty axis and the rear end cap carry out installation fixation by passing through the screw of second through-hole.

Preferably, the first interconnected circular cylindrical cavity, the second cylindrical cavity are coaxially disposed in the casing Body and third circular cylindrical cavity, and internal diameter is sequentially increased, the front side internal perisporium of first circular cylindrical cavity protrudes above setting one First retaining ring, first retaining ring and the first circular cylindrical cavity arranged coaxial；The front bulkhead periphery of the casing opens up one First concave station.

Preferably, the harmonic speed reducer includes:

Wave sends out device, and the preceding outboard end of first circular cylindrical cavity is arranged in coaxial spaced, and the wave hair device includes convex The first bearing of the cam periphery is taken turns and is arranged in, the first bearing is flexible bearing；

Flexbile gear is fixed on the casing front bulkhead, and the flexbile gear is set in wave hair device periphery；

Firm gear is set in the flexbile gear periphery；And

Crossed roller bearing, axial direction are located between the firm gear and the casing；

Wherein, the flexbile gear periphery is fixed on first concave station, and the flexbile gear inner circumferential forward end, which extends up to, is pressed from both sides It is located between the wave hair device and firm gear, the first bearing is folded between the flexbile gear and wave hair device；

The outer ring of the crossed roller bearing is fixed on first concave station, before the inner ring of the crossed roller bearing End wall is fixed with the firm gear tail end wall, and the inner ring of the crossed roller bearing is located at the flexbile gear periphery.

Preferably, the rotating circular disc is axially extending to the casing internal from the tail end wall of the cam, until prolonging The second circular cylindrical cavity tail end, the rotating circular disc and the casing arranged coaxial are extended to, the rotating circular disc middle part is outer All one second bearings of sandwiched between the first circular cylindrical cavity inner circumferential, and the axial position of the second bearing limits；Institute It states and opens up one second annular concave platform on the internal perisporium of rotating circular disc, the permanent magnet is uniformly fitted in second annular concave platform On internal perisporium.

Preferably, first step and second step, and the First are disposed on the axle body of the hollow shaft front end The outer diameter of rank is less than the outer diameter of the second step, and the second step coaxial spaced is arranged in the rotating circular disc, described First step is drawn outward from the front opening of wave hair device, wherein the stator fitting is fixed on outside the second step Week, and the stator shaft orientation protrudes from the axial sides of first circular cylindrical cavity.

Preferably, the flange tail end wall periphery is fixed on the firm gear front bulkhead, and the flange axis center offers Third through-hole, the third through-hole caudad extend a hollow tube, and the hollow tube coaxially extends on the inside of the cam and the Between one step, one 3rd bearing of sandwiched between the hollow tube periphery and the cam inner circumferential；The hollow tube rotation setting One fourth bearing of sandwiched between hollow shaft front end periphery, the hollow tube inner circumferential and the first step periphery.

Preferably, the flexbile gear periphery wall be folded in the crossed roller bearing outer ring and the first concave station end wall Between, one second groove is opened up in the first concave station axial direction outer wall inner circumferential, and one second sealing ring is installed in second groove； A third groove is opened up on the outer ring tail end wall of the crossed roller bearing, and a third sealing ring is installed in the third groove； With an oil sealing sealing between the outer ring of the crossed roller bearing and the inner ring of the crossed roller bearing；The crossed roller axis One the 4th groove is opened up on the inner ring front bulkhead held, and one the 4th sealing ring, the 4th sealing ring are installed in the 4th groove It is folded between the firm gear tail end wall and the inner ring of the crossed roller bearing；

One the 5th groove is opened up on the front bulkhead of the firm gear, and one the 5th sealing ring is installed in the 5th groove, it is described 5th sealing ring is folded between the firm gear front bulkhead and the flange tail end wall.

Preferably, an encoder transition sleeve, the encoder transition sleeve tail end are installed in the tail end periphery of the rotating circular disc Periphery opens up one second concave station, one encoder code disc of fitting installation on second concave station, and encoder code disc rotation is set It sets in the second cylindrical cavity body, is installed on the front end face of the third circular cylindrical cavity of the encoder code disc periphery One encoder, the encoder and the encoder code disc spaced-apart alignment.

The beneficial effects of the utility model are as follows:

1, the utility model is simple and compact for structure, and design is reasonable, by customization external rotor electric machine, harmonic speed reducer, encoder Deng composition, there is flat structure, the advantages that installation is simple, and output is stablized, and structural compatibility is high.

2, the utility model, which passes through, is directly embedded into the external rotor electric machine of customization inside wave producer, in external rotor electric machine In the case where inherently short than inner rotor motor length, intermediate transition structure is further eliminated, the axis of overall mechanism is shortened Xiang overall length, so that the utility model is thinner than other harmonic reduction all-in-one machines of Same Efficieney density.

3, the utility model makes the harmonic reduction all-in-one machine become hollow structure by adding hollow shaft, and in hollow shaft Portion is for cabling, therefore the utility model is suitable for servicing the joint position of class robot.

4, the utility model motion process completes full closed loop control by encoder, due to the extremely low gear back gaps of harmonic speed reducer With high repetitive positioning accuracy, to ensure that the hollow ultrathin outer rotor harmonic reduction all-in-one machine is high-precision externally defeated Out.

The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through Research and practice to the utility model and be understood by the person skilled in the art.

Detailed description of the invention

Fig. 1 is the side sectional view of the utility model；

Fig. 2 is the explosive view of the utility model；

Fig. 3 is the first side view of the utility model flange；

Fig. 4 is second of side view of the utility model flange；

Fig. 5 is the first side view that the utility model wave sends out device；

Fig. 6 is second of side view that the utility model wave sends out device；

Fig. 7 is the first side view of the utility model casing；

Fig. 8 is second of side view of the utility model casing；

Fig. 9 is the side view of the utility model encoder and encoder code disc；

Figure 10 is the first side view of the utility model rear end cap；

Figure 11 is second of side view of the utility model rear end cap；

Figure 12 is the side view of the utility model hollow shaft.

In figure: 1, flange；2, harmonic speed reducer；3, wave sends out device；4, casing；5, stator；6, permanent magnet；7, encoder；8, Rear end cap；9, hollow shaft；10, encoder transition sleeve；11, encoder code disc；12, the second limited block；13, fourth bearing；14, Three bearings；15, first bearing；16, second bearing；17, the first limited block；21, flexbile gear；22, steel wheel；23, crossed roller bearing； 24, oil sealing；25, cam；31, rotating circular disc；32, the second annular concave platform；33, the second erecting bed；34, the second retaining ring；35, annular Protrusion；41, the first circular cylindrical cavity；42, the second circular cylindrical cavity；43, third circular cylindrical cavity；44, the first concave station；45, One screw hole；71, fifth hole；81, first annular boss；82, the first groove；83, first through hole；84, first annular concave station； 91, chuck；92, the second through-hole；93, first step；94, the 4th erecting bed；95, second step；96, the first erecting bed；101, Third through-hole；102, hollow tube；103, limiting stand；104, the 6th groove；105, the second annular convex platform；106, third erecting bed； 107, the 5th screw hole；111, fourth hole；112；Third screw hole；221, the 5th groove；231, the 4th groove；232, third is recessed Slot；411, the first retaining ring；421, the second screw hole；441, the second groove；442, the 4th screw hole.

Specific embodiment

The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation Book text can be implemented accordingly.

It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more The presence or addition of a other elements or combinations thereof.

Please refer to Fig. 1 and Fig. 2, the utility model provides a kind of technical solution: the hollow ultrathin outer rotor harmonic wave of one kind subtracts Fast all-in-one machine, including flange 1, harmonic speed reducer 2, wave hair device 3, casing 4, stator 5, permanent magnet 6, encoder 7, rear end cap 8, in Empty axis 9 etc., in which:

Casing 4 is the hollow barrel structure of multi-stag, and the open tail end of casing 4 is closed with rear end cap 8.Specifically, casing 4 Inside coaxially it is disposed with the first interconnected circular cylindrical cavity 41, the second circular cylindrical cavity 42 and third circular cylindrical cavity 43, and internal diameter is sequentially increased；It is circumferential outside 8 front bulkhead of rear end cap that casing 4 is projecting inward is provided with first annular boss 81, and the first ring The outer diameter of shape boss 81 is consistent with the internal diameter that 4 tail end of casing is open, and 4 tail end of casing is set in first annular 81 periphery of boss, machine Be spaced apart on 4 tail end wall of shell and be equipped with several first screw holes 45, casing 4 and rear end cap 8 by pass through the screw of the first screw hole 45 into Row is fixedly connected.

In the present embodiment, for the leakproofness for improving body, opened up on the rear end cap 8 on the inside of first annular 81 periphery of boss First groove 82, and the first sealing ring is embedded in the first groove 82, the first sealing ring is folded in 4 tail end of casing and rear end cap Static sealing is carried out between 8 contact surface.

The axis center of rear end cap 8 is embedded with hollow shaft 9, hollow shaft 9 through first through hole 83 is offered in first through hole 83 Tail end be fixed on the tail end wall of rear end cap 8, hollow shaft 9 extends through forward the axis center of casing 4, that is to say, that The utility model is hollow structure, and the inside of hollow shaft 9 is for cabling, so that the utility model is suitable for servicing class robot Joint position.

Specifically, coaxially offering first annular concave station 84 on the tail end wall of first through hole 83, the tail end of hollow shaft 9 is corresponding The size of first annular concave station 84 is provided with chuck 91, and the periphery of chuck 91, which is spaced apart, is equipped with several second through-holes 92, chuck 91 Fitting is embedded in first annular concave station 84, and hollow shaft 9 and rear end cap 8 are fixed by passing through the screw of the second through-hole 92 Connection.

Harmonic speed reducer 2 is coaxially mounted on the front bulkhead of casing 4, specifically, harmonic speed reducer 2 includes wave hair device 3, soft Wheel 21, firm gear 22, crossed roller bearing 23 etc..

The preceding outboard end of the first circular cylindrical cavity 41 is arranged in wave hair 3 coaxial spaced of device, and wave hair device 3 includes cam 25 and sets The first bearing 15 in 25 periphery of cam is set, and first bearing 15 is flexible bearing, wherein 25 tail end periphery wall of cam protrudes above It is provided with annular protrusion 35, the tail end of 15 inner ring of first bearing contradicts on the front bulkhead of annular protrusion 35.

Being extended on wave hair 3 side wall of device into casing 4 has rotating circular disc 31, specifically, rotating circular disc 31 is from cam 25 Tail end wall on it is axially extending to the inside of casing 4, until extending to 42 tail end of the second circular cylindrical cavity, rotating circular disc 31 and casing 4 arranged coaxials, and second bearing 16, i.e. wave are folded between 31 middle part periphery of rotating circular disc and 41 inner circumferential of the first circular cylindrical cavity It sends out device 3 and the relative rotation in casing 4 is realized by second bearing 16.

In the present embodiment, the axial position of second bearing 16 is limited.The front side internal perisporium of first circular cylindrical cavity 41 is convex It is provided with the first retaining ring 411,41 arranged coaxial of the first retaining ring 411 and the first circular cylindrical cavity, so that opening inside diameter is small out In the internal diameter of the first circular cylindrical cavity 41, the first retaining ring 411 is contradicted in the front end of 16 outer ring of second bearing；31 middle part of rotating circular disc The second erecting bed 33 is offered on periphery wall, fourth bearing 16 is set on the second erecting bed 33, before 16 inner ring of second bearing End contradicts on the front bulkhead of the second erecting bed 33；The first limited block 17 is provided in second cylindrical cavity body, specifically, second The front bulkhead periphery of circular cylindrical cavity 42 offers several second screw holes 421, and the first limited block 17 is by passing through the second screw hole 421 Screw be fixed in the second circular cylindrical cavity 42, the tail end of second bearing 16 contradicts on the front bulkhead of the first limited block 17, It is realized with this when rotating circular disc 31 rotates in casing 4, axial direction does not occur for the second bearing 16 of sandwiched between the two On relative motion.

It is disposed with first step 93 and second step 95 with 9 front axle of hollow shaft, and the outer diameter of first step 93 is small In the outer diameter of second step 95,95 coaxial spaced of second step is arranged in rotating circular disc 31, and first step 93 sends out device 3 from wave Front opening is drawn outward, wherein offers the first erecting bed 96 on the axle body of second step 95, the fitting of stator 5 is fixed on the One erecting bed, 96 periphery, and the axially projecting axial sides in the first circular cylindrical cavity 41 of stator 5.

It is recessed that the interval of rotating circular disc 31 envelope offers the second annular on the periphery of stator 5, the internal perisporium of rotating circular disc 31 Platform 32 is uniformly fitted with several permanent magnets 6 on the internal perisporium of second annular concave platform 32, and permanent magnet 6 is distributed in 5 periphery of stator Space, to form outer-rotor structure, magnetic density is higher, and torque is bigger, and the utility model passes through the external rotor electric that will be customized Machine is directly embedded into 3 the inside of wave producer, in the case where external rotor electric machine is inherently shorter than inner rotor motor length, further Eliminate intermediate transition structure, shorten the axial overall length of overall mechanism so that the utility model than Same Efficieney density its His harmonic reduction all-in-one machine is thinner.

For external rotor electric machine since its power density is big, volume is more flat, with generic servo motor or stepper motor phase Than bigger output torque can be provided under same spatiality, and in the case where exporting same torque, external rotor electric machine can be accomplished It is more flat, and installation is simple, is conducive to whole size and reduces, and with 5 excitation signal of stator is given, permanent magnet can be driven 6 and its entire rotating circular disc 31 rotate, since rotating circular disc 31 and cam 25 are an integral structure, to drive harmonic speed reducer 2 rotate synchronously.

The tail end periphery of rotating circular disc 31 is equipped with encoder transition sleeve 10, and 10 tail end periphery of encoder transition sleeve offers Second concave station, the fitting of the second concave station periphery is equipped with encoder code disc 11, and encoder code disc 11 is coaxially located at the second cylinder In cavity 42, encoder 7 is installed on the front end face of the third circular cylindrical cavity 43 of 11 periphery of encoder code disc, encoder 7 with 11 spaced-apart alignment of encoder code disc.

In the present embodiment, 11 axis center of encoder code disc, which runs through, offers fourth hole 111, and fourth hole 111 is interior Diameter is consistent with the outer diameter of the second concave station, and encoder code disc 11 is bonded the periphery wall for being set in the second concave station by fourth hole 111 On, the periphery of encoder code disc 11 offers several third screw holes 112, and the screw across third screw hole 112 is by encoder code disc 11 are fixedly attached on encoder transition sleeve 10；7 front bulkhead periphery of encoder, which is spaced apart, is equipped with several fifth holes 71, encoder 7 are fixedly attached on third circular cylindrical cavity 43 by passing through the screw of fifth hole 71.

Specifically, encoder code disc 11 is rotated synchronously with rotating circular disc 31, against the rotation of encoder code disc 11, encoder Turn signal on 7 acquisition encoder code discs 11, to obtain the tach signal of wave hair device 3, the motion process of the utility model Full closed loop control is completed by encoder 7, due to the extremely low gear back gaps of harmonic speed reducer and high repetitive positioning accuracy, to protect The high-precision external output of hollow ultrathin outer rotor harmonic reduction all-in-one machine is demonstrate,proved.

Flexbile gear 21 is fixed on the front bulkhead of casing 4, and firm gear 22 is set in 21 periphery of flexbile gear, and flexbile gear 21 is set in wave hair 3 periphery of device, the inner circumferential forward end of flexbile gear 21, which extends up to, to be folded between wave hair device 3 and firm gear 22, and first bearing 15 is pressed from both sides It is located between flexbile gear 21 and wave hair device 3.

Crossed roller bearing 23 is axial between firm gear 22 and casing 4, and it is recessed that the front bulkhead periphery of casing 4 offers first Platform 44, the outer ring of crossed roller bearing 23 are fixed on the first concave station 44, the inner ring front bulkhead of crossed roller bearing 23 and just It takes turns 22 tail end walls to fix, and the inner ring of crossed roller bearing 23 is located at 21 periphery of flexbile gear.

In the present embodiment, the periphery wall of flexbile gear 21 is folded in 44 end wall of outer ring and the first concave station of crossed roller bearing 23 Between, wherein it is spaced apart on the axial outer wall of the first concave station 44 and is equipped with several 4th screw holes 442, by bolt from crossed roller The outer ring front end of bearing 23 is mounted in the 4th screw hole 442 after inwardly running through crossed roller bearing 23, so that crossed roller bearing 23 outer ring and flexbile gear 21 are fixedly attached on casing 4.

The utility model connects in harmonic speed reducer 2 with harmonic speed reducer 2 and motor to improve the leakproofness of body Be arranged between contacting surface it is multiple-sealed, to improve the degree of protection of entire body.

Specifically, offering the second groove 441 in the axial outer wall inner circumferential of the first concave station 44, it is equipped in the second groove 441 Second sealing ring；Third groove 232 is offered on the outer ring tail end wall of crossed roller bearing 23, is equipped in third groove 232 Third sealing ring；It is sealed between the outer ring of crossed roller bearing 23 and the inner ring of crossed roller bearing 23 with oil sealing 24；Intersect rolling The 4th groove 231 is offered on the inner ring front bulkhead of sub- bearing 23, the 4th sealing ring is installed in the 4th groove 231, and the 4th is close Seal is folded between 22 tail end wall of firm gear and the inner ring of crossed roller bearing 23.

By adding above three sealing ring and an oil sealing 24, realizes the sealing to 2 axial ends of harmonic speed reducer, mention The degree of protection of high body.

Flange 1 is coaxially connected on the output end of harmonic speed reducer 2, and flange 1 can drive robot to do when exporting outward Link motion.Specifically, the tail end wall periphery of flange 1 is fixed on 22 front bulkhead of firm gear, wherein 1 tail end wall periphery of flange is convex It is provided with the second annular convex platform 105 out, and the internal diameter of the second annular convex platform 105 is consistent with the outer diameter of firm gear 22, the second convex annular The fitting of platform 105 is set on the periphery wall of 22 front end of firm gear, and several 5th screw holes are uniformly provided on the axial periphery wall of flange 1 107, flange 1 is fixedly connected in firm gear 22 by the screw across the 5th screw hole 107.Further, the front bulkhead of firm gear 22 On offer the 5th groove 221, the 5th sealing ring is installed, the 5th sealing ring is folded in firm gear 22 in the 5th groove 221 It is sealed between the contact surface of the tail end wall periphery of front bulkhead and flange 1.

1 axis center of flange offers third through-hole 101, and third through-hole 101 is caudad extended with hollow tube 102, hollow tube 102 coaxially extend between the inside of cam 25 and first step 93, and the is folded between 25 inner circumferential of 102 periphery of hollow tube and cam Three bearings 14.Specifically, 102 tail end periphery of hollow tube offers third erecting bed 106, the inner circumferential protrusion of 25 tail end of cam opening It is provided with the second retaining ring 34, the second retaining ring 34 sends out 3 arranged coaxial of device with wave, so that opening inside diameter is less than the interior of cam 25 Diameter, 3rd bearing 14 are axially positioned between the second retaining ring 34 and the front bulkhead of third erecting bed 106, and then with 3rd bearing 14 Positioning radially is carried out to wave hair device 3.

Hollow tube 102 is rotatably arranged on 9 front end periphery of hollow shaft, between 93 periphery of 102 inner circumferential of hollow tube and first step It is folded with fourth bearing 13, i.e., flange 1 realizes relative rotation between hollow shaft 9 and determining radially by fourth bearing 13 Position.

In the present embodiment, the axial position of fourth bearing 13 is limited.The 4th is offered on the axle body of 93 front end of first step Erecting bed 94,102 inner circumferential of hollow tube position corresponding with the 4th erecting bed 94 offer limiting stand 103, and fourth bearing 13 is pressed from both sides It is located between the 4th erecting bed 94 and limiting stand 103, and the tail end of fourth bearing 13 is contradicted in the 4th erecting bed 94 and limiting stand On 103 side wall；The front inner circumferential of limiting stand 103 offers the 6th groove 104, is embedded with the second limit in the 6th groove 104 Block 12, the second limited block 12 are folded between the 6th groove 104 and the 4th erecting bed 94, and the front end of fourth bearing 13 contradicts On the tail end wall of second limited block.

In conclusion flange 1 is fixed by screw and harmonic speed reducer 2, harmonic speed reducer 2 is solid by screw and casing 4 Fixed, casing 4 is fixed by screw and rear end cap 8, and rear end cap 8 is connected by screw with hollow shaft 9, and hollow shaft 9 and stator 5 connect It connects, permanent magnet 6 is bonded at 3 inner hole of wave producer.After servo-system starting, since permanent magnet 6 is bonded in wave producer 3 At hole, stator 5 generates rotating excitation field and wave producer 3 is driven to rotate, and the harmonic wave that the rotation of wave producer 3 generates makes harmonic speed reducer 2 Operating, so that flange 1 be driven to export.The utility model is by the way that the external rotor electric machine of customization to be directly embedded into wave producer 3 Face further eliminates intermediate transition structure, contracting in the case where external rotor electric machine is inherently shorter than inner rotor motor length The axial overall length of short overall mechanism, so that the utility model is thinner than other harmonic reduction all-in-one machines of Same Efficieney density；Electricity Machine motion process completes full closed loop control by encoder 7, due to the extremely low gear back gaps of harmonic speed reducer and high resetting Precision, to ensure that the hollow ultrathin outer rotor harmonic reduction all-in-one machine high-precision externally output；The utility model structure It is particularly suitable in service class joint of robot position for internal cabling for hollow structure.In short, this hollow ultrathin outer turn Sub- harmonic reduction all-in-one machine structure is simple and compact, and rationally, installation is simple for design, and output is stablized, and structural compatibility is high, is suitable for one The service class robot industry very stringent to length requirement a bit.

Although being disclosed for illustrative purpose the preferred embodiment of the utility model, this field skill Art personnel will recognize that: without departing from the scope of the utility model as disclosed in appended claims and spirit, It is able to carry out various modifications, addition and replacement.

Claims (10)

1. a kind of hollow ultrathin outer rotor harmonic reduction all-in-one machine characterized by comprising

Casing (4) is the hollow barrel structure of a multi-stag, and the casing (4) tail end is closed with a rear end cap (8)；

Hollow shaft (9), through be arranged in the casing (4) axis center, hollow shaft (9) tail end be fixed on it is described after On end cap (8), a stator (5) are set on hollow shaft (9) axle body；

Harmonic speed reducer (2) is coaxially mounted on the casing (4) front bulkhead, sends out device from the wave of the harmonic speed reducer (2) (3) rotating circular disc (31) are extended into the casing (4) on side wall, are provided on rotating circular disc (31) internal perisporium Several permanent magnets (6), the permanent magnet (6) are distributed in the stator (5) periphery；And

Flange (1), it is coaxially connected on the output end of the harmonic speed reducer (2).

2. hollow ultrathin outer rotor harmonic reduction all-in-one machine as described in claim 1, which is characterized in that the casing (4) Tail end open wide, one first annular boss (81) of the circumferential projecting inward setting of casing (4) outside rear end cap (8) front bulkhead, And the outer diameter of the first annular boss (81) is consistent with the internal diameter that the casing (4) tail end is open, casing (4) the tail end set It is located at first annular boss (81) periphery；It is opened on the rear end cap (8) on the inside of first annular boss (81) periphery If one first groove (82), it is embedded one first sealing ring in first groove (82), first sealing ring is folded in institute It states between casing (4) tail end and the contact surface of the rear end cap (8).

3. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 2, which is characterized in that the rear end cap (8) axis center opens up a first annular concave station on the tail end wall of the first through hole (83) through opening up a first through hole (83) (84), the first annular concave station (84) and the first through hole (83) arranged coaxial, one card of hollow shaft (9) tail end setting Disk (91), chuck (91) fitting are embedded in the first annular concave station (84)；Chuck (91) the periphery interval opens up Have the second through-hole (92), the hollow shaft (9) and the rear end cap (8) are carried out by passing through the screw of second through-hole (92) Installation is fixed.

4. hollow ultrathin outer rotor harmonic reduction all-in-one machine as described in claim 1, which is characterized in that the casing (4) Inside coaxially it is disposed with interconnected the first circular cylindrical cavity (41), the second circular cylindrical cavity (42) and third cylindrical cavity Body (43), and internal diameter is sequentially increased, the front side internal perisporium of first circular cylindrical cavity (41) protrudes above one first retaining ring of setting (411), first retaining ring (411) and the first circular cylindrical cavity (41) arranged coaxial；Outside the front bulkhead of the casing (4) Mono- first concave station (44) of Zhou Kaishe.

5. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 4, which is characterized in that the harmonic reduction Device (2) includes:

Wave sends out device (3), and the preceding outboard end in first circular cylindrical cavity (41) is arranged in coaxial spaced, and the wave sends out device (3) Including cam (25) and setting in the first bearing (15) of the cam (25) periphery, the first bearing (15) is flexible shaft It holds；

Flexbile gear (21) is fixed on the casing (4) front bulkhead, and the flexbile gear (21) is set in wave hair device (3) outside Week；

Firm gear (22) is set in the flexbile gear (21) periphery；And

Crossed roller bearing (23), axial direction are located between the firm gear (22) and the casing (4)；

Wherein, flexbile gear (21) periphery is fixed on first concave station (44), and flexbile gear (21) the inner circumferential forward end extends Until being folded between wave hair device (3) and firm gear (22), the first bearing (15) is folded in the flexbile gear (21) Between wave hair device (3)；

The outer ring of the crossed roller bearing (23) is fixed on first concave station (44), the crossed roller bearing (23) Inner ring front bulkhead fixed with the firm gear (22) tail end wall, and the inner ring of the crossed roller bearing (23) is located at the flexbile gear (21) periphery.

6. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 5, which is characterized in that the rotating circular disc (31) internal axially extending to the casing (4) from the tail end wall of the cam (25), until extending to second cylinder Shape cavity (42) tail end, the rotating circular disc (31) and the casing (4) arranged coaxial, rotating circular disc (31) middle part periphery One second bearing of sandwiched (16) between the first circular cylindrical cavity (41) inner circumferential, and the axial position of the second bearing (16) Set restriction；One second annular concave platform (32) is opened up on the internal perisporium of the rotating circular disc (31), the permanent magnet (6) is uniformly bonded On the internal perisporium of second annular concave platform (32).

7. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 6, which is characterized in that the hollow shaft (9) first step (93) and second step (95) are disposed on the axle body of front end, and the outer diameter of the first step (93) is small Outer diameter in the second step (95), second step (95) the coaxial spaced setting is in the rotating circular disc (31), institute It states first step (93) to draw outward from the front opening of wave hair device (3), wherein stator (5) fitting is fixed on institute State second step (95) periphery, and the axially projecting axial sides in first circular cylindrical cavity (41) of the stator (5).

8. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 7, which is characterized in that the flange (1) Tail end wall periphery is fixed on the firm gear (22) front bulkhead, and flange (1) axis center offers third through-hole (101), institute It states third through-hole (101) caudad to extend a hollow tube (102), the hollow tube (102) coaxially extends to the cam (25) Between inside and first step (93), one third axis of sandwiched between hollow tube (102) periphery and the cam (25) inner circumferential Hold (14)；The hollow tube (102) is rotatably arranged on the hollow shaft (9) front end periphery, hollow tube (102) inner circumferential and institute State one fourth bearing of sandwiched (13) between first step (93) periphery.

9. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 8, which is characterized in that the flexbile gear (21) Periphery wall is folded between the outer ring of the crossed roller bearing (23) and first concave station (44) end wall, and described first is recessed One second groove (441) is opened up in platform (44) axial direction outer wall inner circumferential, and one second sealing ring is installed in second groove (441)； A third groove (232), installation in the third groove (232) are opened up on the outer ring tail end wall of the crossed roller bearing (23) One third sealing ring；With an oil between the outer ring of the crossed roller bearing (23) and the inner ring of the crossed roller bearing (23) Seal (24) sealing；One the 4th groove (231), the 4th groove are opened up on the inner ring front bulkhead of the crossed roller bearing (23) (231) one the 4th sealing ring is installed, the 4th sealing ring is folded in the firm gear (22) tail end wall and intersects rolling with described in Between the inner ring of sub- bearing (23)；

One the 5th groove (221) is opened up on the front bulkhead of the firm gear (22), installation one the 5th is close in the 5th groove (221) Seal, the 5th sealing ring are folded between the firm gear (22) front bulkhead and the flange (1) tail end wall.

10. hollow ultrathin outer rotor harmonic reduction all-in-one machine as claimed in claim 4, which is characterized in that the rotation circle An encoder transition sleeve (10) is installed in the tail end periphery of disk (31), and encoder transition sleeve (10) the tail end periphery opens up one second Concave station, fitting installation one encoder code disc (11) on second concave station, and the encoder code disc (11) is rotatably arranged on institute It states in the second circular cylindrical cavity (42), the front end face of the third circular cylindrical cavity (43) of encoder code disc (11) periphery One encoder of upper installation (7), the encoder (7) and the encoder code disc (11) spaced-apart alignment.