CN115037096A - Hub motor assembly of integrated two-stage planetary reducer - Google Patents
Hub motor assembly of integrated two-stage planetary reducer Download PDFInfo
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- CN115037096A CN115037096A CN202210710378.5A CN202210710378A CN115037096A CN 115037096 A CN115037096 A CN 115037096A CN 202210710378 A CN202210710378 A CN 202210710378A CN 115037096 A CN115037096 A CN 115037096A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Retarders (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention relates to a hub motor assembly of an integrated double-stage planetary reducer, belonging to the technical field of electric wheels and comprising a support shaft; the hub motor is sleeved on the supporting shaft; the primary planetary gear reducer is arranged on one side of the hub motor; the secondary planetary gear reducer is arranged on the output side of the primary planetary gear reducer; the disc brake is arranged in a hub cavity of the hub motor and used for providing mechanical braking force; the steering bracket is arranged on the hub motor; and the steering knuckle arm is fixedly connected with the steering support. The hub motor assembly of the integrated double-stage planetary reducer, disclosed by the invention, has the advantages that the two-stage planetary reducer, the hub motor, the steering knuckle arm and the brake are subjected to integral topological design, the in-wheel space is utilized to the maximum extent, the integration level is high, and the matching of a large transmission ratio and a high-speed inner rotor motor is realized in a limited wheel space.
Description
Technical Field
The invention relates to the technical field of electric wheels, in particular to a hub motor assembly of an integrated double-stage planetary reducer.
Background
The electric wheel integrates the driving motor and the transmission braking steering device into the wheel hub, simplifies the speed changer, the clutch, the transmission shaft, the differential mechanism and the like in the traditional automobile, and directly or indirectly transmits the driving force to the wheel through the integrated speed reducer, so that the space utilization rate and the transmission efficiency of the automobile are greatly improved. The existing electric wheel direct-drive scheme is more applied, the wheel hub motor adopting the scheme is a low-speed outer rotor motor, large torque can be output under working conditions of starting, accelerating, climbing and the like, and when the motor continuously inputs large current, the motor is overheated and even damaged. Namely, the high-current input motor has higher requirements on electrical hardware. The electric wheel integration scheme with the speed reducer adopts a low-speed inner rotor motor, the requirement on the output torque of the motor is low, and the power is transmitted to a tire after the speed reduction and torque increase of a planetary gear speed reducer.
In the existing electric wheel integration scheme, although the integration of a hub motor, a speed reducer and a brake is basically realized, the integration is in a stacking type, namely, all parts are still designed and assembled independently, and a series of problems of low integration level, complicated stress of all parts of a wheel, inconvenience in disassembly and assembly and the like generally exist.
Disclosure of Invention
The present invention is directed to a hub motor assembly integrated with a two-stage planetary reducer, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
an integrated two-stage planetary reducer in-wheel motor assembly comprising:
the support shaft is used as a rotating central shaft and an assembly base of the electric wheel to mainly bear the force of the bending moment in the electric wheel;
the hub motor is sleeved on the support shaft and used as a main body structure of the electric wheel and provides driving force and motor braking force of the electric wheel;
the primary planetary gear reducer is arranged on one side of the hub motor and is used for reducing the speed and increasing the torque of the driving force of the hub motor and transmitting the driving force;
the secondary planetary gear reducer is arranged on the output side of the primary planetary gear reducer and is used for reducing the speed and increasing the torque of the driving force from the primary planetary gear reducer again and transmitting the driving force to the rim;
the disc brake is arranged in a hub cavity of the hub motor and used for providing mechanical braking force;
the steering bracket is arranged on the hub motor;
and the steering knuckle arm is fixedly connected with the steering support.
As a further technical scheme of the invention, a plurality of steps for positioning are arranged on the supporting shaft, and hub bearing locking nuts for axial fixation are arranged at two ends of the supporting shaft.
As a further aspect of the present invention, the in-wheel motor includes:
the stator sleeve is sleeved outside the support shaft;
the stator windings are uniformly distributed on the stator sleeve and fixedly connected with the stator sleeve;
the rotor bracket is connected with the supporting shaft through a plurality of steering bearings, is used as a rotating part of the hub motor and is matched with the primary planetary gear bearing reducer;
the permanent magnets are correspondingly arranged on the rotor bracket corresponding to the stator winding;
the stator sealing sleeve is connected with the stator sleeve and used for sealing;
the steering bearing retainer ring is sleeved outside the supporting shaft and is used for matching with the step on the supporting shaft to axially position the steering bearing;
and the first sealing pieces are respectively arranged between the rotor bracket and the stator sleeve and between the rotor bracket and the stator sealing sleeve and used for sealing.
As a further technical scheme of the invention, the steering support is fixedly connected with the stator sleeve through a steering support fixing bolt.
As a still further aspect of the present invention, the primary planetary gear reducer includes:
the primary sun gear is fixedly arranged on the rotor bracket and is of a hollow structure;
the primary planet carrier is sleeved outside the supporting shaft;
the plurality of primary planet gears are arranged on the primary planet carrier through a plurality of primary planet gear bearings and are used for transmitting the power from the primary sun gear to the primary planet carrier;
the primary gear ring is fixedly arranged on the stator sleeve;
the first snap springs are arranged on the primary planet carrier and are used for respectively fixing the axial directions of the primary planet gears and the primary planet gear bearings;
and the plurality of first-stage planet carrier bearings are respectively arranged between the first-stage planet carrier and the second-stage planet carrier as well as between the first-stage planet carrier and the support shaft.
As still further aspect of the present invention, the two-stage planetary gear reducer includes:
the secondary sun gear is fixedly arranged on the primary planet carrier;
the secondary planet carrier is sleeved outside the support shaft and is used for transmitting power to a rim and a rim flange of a wheel;
the secondary planet gears are arranged on the secondary planet carrier through a plurality of secondary planet gear bearings and are used for transmitting the power from the secondary sun gear to the secondary planet carrier;
the secondary gear ring is fixedly arranged on the stator sleeve;
the second snap springs are arranged on the secondary planet carrier and are used for fixing the second-stage planetary gears and the second-stage planetary gear bearings in the axial direction;
the sealing end cover is connected with the outer side of the stator sleeve and used for sealing;
the hub flange is fixedly arranged on the secondary planet carrier and is used for transmitting power to a wheel rim together with the secondary planet carrier;
the hub end cover is arranged on the outer side of the bearing and used for sealing;
the plurality of second sealing elements are respectively arranged between the sealing end cover and the hub flange and between the hub flange and the hub end cover for sealing;
and the hub bearing is arranged between the hub flange and the supporting shaft.
As a still further aspect of the present invention, the disc brake includes:
the brake disc is connected with the rotor bracket through a plurality of brake disc fixing bolts which are uniformly distributed;
and the brake calipers are connected with the lifting lugs on one side of the steering support through a plurality of brake caliper fixing bolts which are uniformly distributed.
As a further technical solution of the present invention, the brake disc is a ventilated brake disc, and the brake disc is located inside the electric wheel.
Compared with the prior art, the invention has the beneficial effects that:
1. the hub motor assembly of the integrated double-stage planetary reducer, disclosed by the invention, has the advantages that the two-stage planetary reducer, the hub motor, the steering knuckle arm and the brake are subjected to integral topological design, the in-wheel space is utilized to the maximum extent, the integration level is high, and the matching of a large transmission ratio and a high-speed inner rotor motor is realized in a limited wheel space.
2. The hub motor assembly of the integrated double-stage planetary reducer is mainly optimized in terms of stress of parts, a supporting shaft and a steering support are fixed, the supporting shaft is used as a fixing part for bearing torque, all parts mainly transmitting the torque are supported on the supporting shaft through bearings, the stress of the supporting shaft is greatly simplified, and the main stress is only the torque; the bending moment and the axial force caused by the stress of the tire (or the suspension) are mainly borne by the steering bracket and the stator sleeve respectively; namely, the decoupling of the torque, the bending moment and the axial force on the stressed component is realized.
3. The hub motor assembly of the integrated double-stage planetary reducer is provided with the supporting shaft as a fixed part, so that the relative rotating speed of the wheel end flange and the supporting shaft is reduced, namely the rotating speed requirement of a bearing is reduced; in addition, the stator sleeve is arranged to bear the axial force of the wheel, so that the bearing can avoid bearing the axial force, and the requirement of a high-speed inner rotor motor can be met by using the angular contact ball bearing.
Drawings
FIG. 1 is a full section isometric view of a hub motor assembly incorporating a dual stage planetary reducer;
FIG. 2 is a cross-sectional view of the internal structure of the hub motor assembly of the integrated double-stage planetary reducer;
FIG. 3 is an exploded view of the hub motor assembly integrated with the dual planetary reduction gear.
In the figure: 1-stator sleeve, 2-end cover fixing bolt, 3-secondary gear ring, 4-end cover, 5-hub outer edge sealing ring, 6-secondary planetary gear, 7-secondary planet carrier, 8-secondary planetary gear bearing, 9-hub flange, 10-hub sealing ring, 11-hub end cover, 12-supporting shaft, 13-hub bearing lock nut, 14-hub bearing, 15-first snap spring, 16-secondary sun gear, 17-primary planet carrier, 18-secondary planet carrier bearing, 19-permanent magnet, 20-stator winding, 21-steering support fixing bolt, 22-steering knuckle arm, 23-steering knuckle arm fixing bolt, 24-steering support, 25-stator seal cover, 26-rotor support, 26-stator support, 27-a first-stage gear ring, 28-a first-stage planet gear, 29-a first-stage planet gear bearing, 30-a second snap spring, 31-a first-stage sun gear, 32-a first-stage planet carrier bearing retainer ring, 33-a steering bracket lock nut, 34-a first steering bearing, 35-a steering bearing retainer ring, 36-a second steering bearing, 37-a brake disc fixing bolt, 38-a brake disc, 39-a first rotor sealing ring, 40-a second rotor sealing ring, 41-a first-stage planet carrier bearing, 42-a brake caliper fixing bolt and 43-a brake caliper.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment of the invention is realized by that, the hub motor assembly of the integrated double-stage planetary reducer shown in fig. 1 to 3 comprises:
the support shaft 12 is used as a rotation central shaft and an assembly base body of the electric wheel to mainly bear the force of bending moment in the electric wheel;
the hub motor is sleeved on the support shaft 12 and used as a main body structure of the electric wheel and provides driving force and motor braking force of the electric wheel;
the primary planet gear bearing 29 speed reducer is arranged on one side of the hub motor and is used for reducing the speed and increasing the torque of the driving force of the hub motor and transmitting the driving force;
the secondary planet gear 6 reducer is arranged on the output side of the primary planet gear bearing 29 reducer and is used for reducing the speed and increasing the torque of the driving force from the primary planet gear bearing 29 reducer again and transmitting the driving force to the rim;
the disc brake is arranged in a hub cavity of the hub motor and used for providing mechanical braking force;
the steering bracket is arranged on the hub motor;
and a knuckle arm 22 fixedly connected with the steering bracket.
In practical application, the hub motor is a main body structure of the electric wheel and provides driving force and motor braking force of the electric wheel, the first-stage planetary gear bearing 29 reducer reduces the speed and increases the torque of the driving force of the hub motor and transmits the driving force to the second-stage planetary gear 6 reducer, the second-stage planetary gear 6 reducer reduces the speed and increases the torque again and transmits the driving force to a rim, so that driving is realized, the steering is completed by matching a steering support with a steering knuckle arm 22, preferably, the steering knuckle arm 22 comprises an upper steering knuckle arm 22 and a lower steering knuckle arm 22, and the upper steering knuckle arm 22 and the lower steering knuckle arm 22 are fixedly connected with the steering support through a steering knuckle arm fixing bolt 23; in addition, for the convenience of installing each structure, be provided with a plurality of steps that are used for the location on the back shaft 12, the wheel hub bearing lock nut 13 that is used for axial fixity is all installed at back shaft 12 both ends, carries out integral topology design through carrying out two-stage planetary gear reducer, in-wheel motor, knuckle arm 22 and stopper promptly, and the in-wheel space is utilized by the at utmost, and the integrated level is high, has realized the cooperation of big drive ratio and high-speed inner rotor motor in limited wheel space.
As shown in fig. 1 and 2, as a preferred embodiment of the present invention, the in-wheel motor includes:
the stator sleeve 1 is sleeved outside the support shaft 12;
a plurality of stator windings 20 uniformly distributed on the stator housing 1 and fixedly connected therewith;
a rotor bracket 26 connected to the support shaft 12 through a plurality of steering bearings for serving as a rotating part of the in-wheel motor and cooperating with a first-stage planetary gear bearing 29 reducer;
a plurality of permanent magnets 19 correspondingly mounted on the rotor holder 26 corresponding to the stator winding 20;
the stator sealing sleeve 25 is connected with the stator sleeve 1 and used for sealing;
the steering bearing retainer ring 35 is sleeved outside the support shaft 12 and is used for matching with a step on the support shaft 12 to axially position the steering bearing;
and a plurality of first sealing elements which are respectively arranged between the rotor bracket 26 and the stator sleeve 1 and the stator sealing sleeve 25 and are used for sealing.
In one case of the present embodiment, the stator can 1 is integrated with the casing of the two-stage planetary gear reducer, and fixes the ring gears of the two-stage planetary gear reducer by interference fit respectively, the stator winding 20 is fixed on the stator sleeve 1 in a circumferential distribution, the lamellar permanent magnets 19 are correspondingly attached to the rotor support 26 corresponding to the stator position one by one, the rotor support 26 as the rotating part of the hub is connected with the supporting shaft 12 through a plurality of steering bearings, and the extension part of the stator is in interference fit with a sun gear of a primary planet gear bearing 29 reducer, the steering bearing comprises a first steering bearing 34 and a second steering bearing 36, the stator sealing sleeve 25 is used as a sealing part of the hub motor, the steering bearing is connected with the stator sleeve 1 through bolts, the outer ring of the steering bearing is matched with the rotor bracket 26, the inner ring of the steering bearing is matched with the support shaft 12, and the two sides of the steering bearing are axially positioned through the step of the support shaft 12 and the steering bearing retainer ring 35; specifically, the steering bracket 24 is fixedly connected with the stator sleeve 1 through the matching of the steering bracket fixing bolt 21 and the steering bracket locking nut 33, and the first sealing element comprises a first rotor sealing ring 39 arranged between the rotor bracket 26 and the stator sealing sleeve 25 and a second rotor sealing ring 40 arranged between the rotor bracket 26 and the stator sleeve 1.
As shown in fig. 2 and 3, as another preferred embodiment of the present invention, the primary planetary gear bearing 29 reducer includes:
the primary sun gear 31 is fixedly mounted on the rotor bracket 26, and the primary sun gear 31 is of a hollow structure;
a primary planet carrier 17 sleeved outside the support shaft 12;
a plurality of primary planetary gears 28 mounted on the primary planetary carrier 17 through a plurality of primary planetary gear bearings 29 for transmitting power from a primary sun gear 31 to the primary planetary carrier 17;
a primary ring gear 27 fixedly mounted on the stator casing 1;
the first snap springs 15 are mounted on the primary planet carrier 17 and respectively fix the axial directions of the primary planet gears 28 and the primary planet gear bearings 29;
and a plurality of primary planet carrier bearings 41 respectively mounted between the primary planet carrier 17 and the secondary planet carrier 7 and between the support shafts 12.
In one aspect of the present embodiment, the primary sun gear 31 of a hollow structure is fixed on the rotor support 26 by interference fit, the primary planet carrier bearing 41 is installed between the primary planet gear bearing 29 and the primary planet carrier 17 to realize the relative rotation of the primary planet gear bearing 29, the support shaft 12 is externally sleeved with the primary planet carrier bearing retainer ring 32 matched with the primary planet carrier bearing 41, the primary planet carrier 17 transmits the power from the primary planet gear bearing 29 to the secondary sun gear 16 of the speed reducer of the secondary planet gear 6, and for convenient connection, the primary ring gear 27 is fixed on the stator sleeve 1 by interference fit; the arrangement of the primary planet gear bearing 29 ensures the stability of the relative rotation.
As shown in fig. 2 and 3, as another preferred embodiment of the present invention, the two-stage planetary gear 6 reducer includes:
the secondary sun gear 16 is fixedly arranged on the primary planet carrier 17;
the secondary planet carrier 7 is sleeved outside the support shaft 12 and used for transmitting power to a rim and a rim flange of a wheel;
a plurality of secondary planet gears 6 mounted on the secondary planet carrier 7 through a plurality of secondary planet gear bearings 8 for transmitting power from a secondary sun gear 16 to the secondary planet carrier 7;
the secondary gear ring 3 is fixedly arranged on the stator sleeve 1;
the second snap springs 30 are mounted on the secondary planet carrier 7 and used for fixing the second-stage planet gears 6 and the second-stage planet gear bearings 8 in the axial direction;
the sealing end cover 4 is connected with the outer side of the stator sleeve 1 and used for sealing;
the hub flange 9 is fixedly arranged on the secondary planet carrier 7 and is used for transmitting power to a wheel rim together with the secondary planet carrier 7;
the hub end cover 11 is arranged on the outer side of the bearing and used for sealing;
the plurality of second sealing elements are respectively arranged between the sealing end cover 4 and the hub flange 9, and between the hub flange 9 and the hub end cover 11 for sealing;
and a hub bearing 14 installed between the hub flange 9 and the support shaft 12.
In one case of this embodiment, a secondary sun gear 16 of a hollow structure is fixed to a primary planet carrier 17 by interference fit, a secondary planet gear 6 is mounted to a secondary planet carrier 7 by a plurality of secondary planet gear bearings 8, a secondary planet carrier bearing 18 is mounted between the secondary planet carrier 7 and the primary planet carrier 17, the secondary planet gear 6 transmits power from the secondary sun gear 16 to the secondary planet carrier 7, the secondary planet carrier 7 then transmits power from the secondary planet gear 6 to a rim and rim flange of a wheel, a needle bearing mounted between the secondary planet gear 6 and the secondary planet carrier 7 can realize relative rotation of the secondary planet gear 6, in order to ensure stable connection, a secondary ring gear 3 is fixed to a stator housing 1 by interference fit, a seal cover 4 is fixedly connected to the stator housing by a seal cover fixing bolt 2, the sealing end cover 4, the hub end cover 11 and the second rotor sealing ring 40 are matched for sealing, the second sealing element comprises a hub outer edge sealing ring 5 arranged between the sealing end cover 4 and the hub flange 9 and a hub sealing ring 10 arranged between the hub flange 9 and the hub end cover 11, and therefore the whole sealing performance is good.
As shown in fig. 2 and 3, as another preferred embodiment of the present invention, the disc brake includes:
a brake disc 38 connected to the rotor support 26 by a plurality of brake disc fixing bolts 37 distributed uniformly;
a brake caliper 43 connected to the lifting lug at one side of the steering bracket by a plurality of brake caliper fixing bolts 42 uniformly distributed
In one aspect of the present embodiment, the brake disc 38 is preferably a ventilation brake disc 38, and is located inside the electric wheel, so that not only the ventilation effect is good, but also the braking stability of the vehicle is greatly guaranteed.
The working principle is as follows: the invention integrates a hub motor, a double-stage planetary gear reducer and a brake into a wheel; during driving, the stator winding 20 is a fixed part, the permanent magnet 19 is subjected to the action force of a magnetic field formed by the stator winding 20 to drive the rotor support 26 to synchronously rotate, the rotor support 26 transmits driving torque to the primary sun gear 31, the power is transmitted to the secondary sun gear 16 by the primary planet carrier 18 after the speed reduction and torque increase of the primary planet gear, the driving torque is transmitted to a rim by the secondary planet carrier 7 and the hub flange 9 after the speed reduction and torque increase of the secondary planet gear reducer again, and finally the driving torque is transmitted to a tire to drive the automobile to run; during braking, on one hand, motor braking force is generated through the reverse process of the driving of the annular hub motor, on the other hand, high-pressure brake fluid in a vehicle braking pipeline enters the brake caliper 43 to push the brake pad to cling to the brake disc 38 to generate mechanical braking force, the brake braking force generated by the brake disc 38 is directly transmitted to the rotor support 26, the motor braking force is also generated by the permanent magnet 19 and transmitted to the rotor support 26 to form total braking force, the total braking force is consistent with the driving force transmission process, and ground braking force is generated at a tire through the combined action of two stages of planetary gear reducers.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (8)
1. An integrated two-stage planetary reducer in-wheel motor assembly, comprising:
the support shaft is used as a rotating central shaft and an assembly base of the electric wheel to mainly bear the force of the bending moment in the electric wheel;
the hub motor is sleeved on the support shaft and used as a main body structure of the electric wheel and provides driving force and motor braking force of the electric wheel;
the primary planetary gear reducer is arranged on one side of the hub motor and is used for reducing the speed and increasing the torque of the driving force of the hub motor and transmitting the driving force;
the secondary planetary gear reducer is arranged on the output side of the primary planetary gear reducer and is used for reducing the speed and increasing the torque of the driving force from the primary planetary gear reducer again and transmitting the driving force to the rim;
the disc brake is arranged in a hub cavity of the hub motor and used for providing mechanical braking force;
the steering bracket is arranged on the hub motor;
and the steering knuckle arm is fixedly connected with the steering support.
2. The hub motor assembly of an integrated two-stage planetary reducer according to claim 1, wherein the supporting shaft is provided with a plurality of steps for positioning, and hub bearing locking nuts for axial fixation are mounted at both ends of the supporting shaft.
3. The integrated two-stage planetary reducer in-wheel motor assembly according to claim 2, wherein said in-wheel motor comprises:
the stator sleeve is sleeved outside the support shaft;
the stator windings are uniformly distributed on the stator sleeve and are fixedly connected with the stator sleeve;
the rotor bracket is connected with the supporting shaft through a plurality of steering bearings, is used as a rotating part of the hub motor and is matched with the primary planetary gear bearing reducer;
a plurality of permanent magnets correspondingly mounted on the rotor support corresponding to the stator winding;
the stator sealing sleeve is connected with the stator sleeve and used for sealing;
the steering bearing retainer ring is sleeved outside the supporting shaft and is used for matching with the step on the supporting shaft to axially position the steering bearing;
and the first sealing elements are respectively arranged between the rotor bracket and the stator sleeve and between the rotor bracket and the stator sealing sleeve and used for sealing.
4. The integrated dual stage planetary reducer in-wheel motor assembly as in claim 3, wherein the steering carrier is fixedly connected to the stator can by a steering carrier fixing bolt.
5. The integrated two-stage planetary reducer in-wheel motor assembly according to claim 3, wherein the one-stage planetary reducer comprises:
the primary sun gear is fixedly arranged on the rotor bracket and is of a hollow structure;
the primary planet carrier is sleeved outside the supporting shaft;
the plurality of primary planet gears are arranged on the primary planet carrier through a plurality of primary planet gear bearings and used for transmitting the power from the primary sun gear to the primary planet carrier;
the primary gear ring is fixedly arranged on the stator sleeve;
the first snap springs are arranged on the primary planet carrier and are used for respectively fixing the axial directions of the primary planet gears and the primary planet gear bearings;
and the plurality of first-stage planet carrier bearings are respectively arranged between the first-stage planet carrier and the second-stage planet carrier as well as between the first-stage planet carrier and the support shaft.
6. The integrated two-stage planetary reducer in-wheel motor assembly according to claim 5, wherein the two-stage planetary reducer comprises:
the secondary sun gear is fixedly arranged on the primary planet carrier;
the secondary planet carrier is sleeved outside the support shaft and is used for transmitting power to a rim and a rim flange of a wheel;
the secondary planet gears are arranged on the secondary planet carrier through a plurality of secondary planet gear bearings and are used for transmitting the power from the secondary sun gear to the secondary planet carrier;
the secondary gear ring is fixedly arranged on the stator sleeve;
the second snap springs are arranged on the secondary planet carrier and are used for fixing the second-stage planetary gears and the second-stage planetary gear bearings in the axial direction;
the sealing end cover is connected with the outer side of the stator sleeve and used for sealing;
the hub flange is fixedly arranged on the secondary planet carrier and is used for transmitting power to a wheel rim together with the secondary planet carrier;
the hub end cover is arranged on the outer side of the bearing and used for sealing;
the plurality of second sealing elements are respectively arranged between the sealing end cover and the hub flange and between the hub flange and the hub end cover and used for sealing;
and the hub bearing is arranged between the hub flange and the supporting shaft.
7. The integrated two-stage planetary reducer in-hub motor assembly according to claim 3, wherein the disc brake comprises:
the brake disc is connected with the rotor bracket through a plurality of brake disc fixing bolts which are uniformly distributed;
and the brake calipers are connected with the lifting lugs on one side of the steering support through a plurality of brake caliper fixing bolts which are uniformly distributed.
8. The integrated two-stage planetary reducer in-wheel motor assembly according to claim 7, wherein the brake disc is a ventilated brake disc, which is located inside the electric wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210710378.5A CN115037096A (en) | 2022-06-22 | 2022-06-22 | Hub motor assembly of integrated two-stage planetary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210710378.5A CN115037096A (en) | 2022-06-22 | 2022-06-22 | Hub motor assembly of integrated two-stage planetary reducer |
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| Publication Number | Publication Date |
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| CN115037096A true CN115037096A (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210710378.5A Pending CN115037096A (en) | 2022-06-22 | 2022-06-22 | Hub motor assembly of integrated two-stage planetary reducer |
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| CN (1) | CN115037096A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117713444A (en) * | 2024-02-06 | 2024-03-15 | 北京航空航天大学 | Distributed driving system integrated with bracket arm, motor and planetary gear reducer |
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2022
- 2022-06-22 CN CN202210710378.5A patent/CN115037096A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117713444A (en) * | 2024-02-06 | 2024-03-15 | 北京航空航天大学 | Distributed driving system integrated with bracket arm, motor and planetary gear reducer |
| CN117713444B (en) * | 2024-02-06 | 2024-04-19 | 北京航空航天大学 | Distributed driving system integrated with bracket arm, motor and planetary gear reducer |
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