CN209987734U - Low-speed large-torque electric wheel device and electric automobile - Google Patents
Low-speed large-torque electric wheel device and electric automobile Download PDFInfo
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- CN209987734U CN209987734U CN201920804812.XU CN201920804812U CN209987734U CN 209987734 U CN209987734 U CN 209987734U CN 201920804812 U CN201920804812 U CN 201920804812U CN 209987734 U CN209987734 U CN 209987734U
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Abstract
The utility model discloses an electronic round of device of low-speed big moment of torsion, include: the motor shell is of a hollow disc structure, and the centers of two sides of the motor shell are coaxially provided with concave cavities; a hub provided on one side of the motor housing; a motor shaft which can rotatably penetrate through the centers of two sides of the motor shell, and one end of the motor shaft can be rotatably arranged in the center of the hub; the inner gear ring is coaxially arranged in a cavity on one side of the motor shell close to the hub in an interference manner; the sun gear is sleeved on one side of the motor shaft corresponding to the inner gear ring in an interference manner; at least one planet gear which is meshed with the inner gear ring and is in meshed transmission with the sun gear; and the at least one planet shaft can rotatably penetrate through the center of the corresponding planet wheel, and one end of the planet shaft close to the hub is fixedly connected with the hub and is used for driving the hub to rotate. The utility model also provides an electric automobile has adopted the electronic round of device of low-speed big moment of torsion, improves ride comfort and the maneuverability that the car traveles.
Description
Technical Field
The utility model relates to an electronic round of structure field, more specifically, the utility model relates to a low-speed big moment of torsion electronic round of device and electric automobile.
Background
As an important solution of the current new energy automobile, the electric automobile has the advantages of energy conservation, environmental protection and the like. Currently, there are three main types of electric vehicles: the centralized driving system is characterized in that power output by the driving motor is transmitted to a transmission shaft through a transmission and then finally transmitted to wheels through a differential mechanism, and one or more motors simultaneously control four wheels; the wheel driving system comprises driving motors which are arranged on a driving axle, and each motor controls one wheel; in the wheel hub driving system, motors, a speed reducer and a brake are all arranged in a wheel hub, and each motor drives one wheel independently to drive the whole vehicle to run. Wherein, adopt wheel hub actuating system, electronic round scheme promptly, is favorable to promoting whole car performance most. The driving system of the hub motor simplifies a transmission, a transmission shaft and a differential mechanism in the traditional automobile, and directly transmits power to wheels, so that the transmission efficiency and the space utilization rate are greatly improved. In addition, the hub motor has the characteristic of independent control of a single wheel, so that the front-wheel drive, the rear-wheel drive or the four-wheel drive can be realized relatively easily, meanwhile, the hub motor can realize differential turning through unequal-speed rotation of the wheels on two sides, the turning radius of the automobile is greatly reduced, and even in-situ steering can be realized under special conditions, so that the hub motor is valuable to special vehicles.
The electric wheel technology enters a product application stage in the field of foreign civil vehicles, the domestic wheel hub motor driven automobile is in a technical research stage, and foreign main automobile enterprises have developed electric wheel automobiles. Military hybrid technologies are being studied in the united states, germany, france, japan, etc., and electric wheel drive + hybrid schemes are being used without exception. Therefore, the electric wheel drive is an important direction for the development of a new generation of electric automobile drive system in the future. The electric wheel is a key assembly of the technology, and the automobile adopting the technology has the advantages of energy conservation, high-efficiency recovery of braking energy, simplified structure of the whole automobile and the like.
The existing electric wheel of the car mostly adopts a direct-drive hub motor scheme, and the wheel is directly driven by a low-speed outer rotor motor, but the development of the electric wheel is greatly hindered due to the characteristic of insufficient output torque of the existing motor, and the motor is required to input large current under the working conditions of starting, climbing, heavy load and the like which need large torque, so that not only batteries and permanent magnets are easily damaged, but also the motor has low efficiency and is easy to heat. In order to ensure large starting torque and good dynamic performance, the requirements on the motor are high, and the realization of the motor is technically difficult.
In the chinese patent application No. 201811066721.7, the two-stage planetary gear reduction mechanism is adopted, which theoretically solves the problems in principle and technology, but it needs two sets of planetary wheel disc reduction mechanisms, and the structure is complex, which causes the unsprung mass to increase dramatically, and affects the smoothness and maneuverability of the automobile. In addition, the heat dissipation and the sealing of the planetary gear speed reducing mechanism are insufficient, the lubrication is difficult to realize, the mechanical abrasion is serious in the process of high-speed operation, and the transmission efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at design and developed a big moment of torsion of low-speed electronic round device, adopt single-stage planetary gear reducer, when guaranteeing sufficient reduction ratio, the structure is simplified greatly, and power transmission route is shorter, improves transmission efficiency.
The utility model discloses a another purpose designs and develops an electric automobile, has adopted the electronic round of device of low-speed big moment of torsion, when guaranteeing sufficient reduction ratio, and the structure is simplified greatly, and power transmission route is shorter, improves the ride comfort and the maneuverability that the car went.
The utility model provides a technical scheme does:
a low-speed high-torque electric wheel apparatus comprising:
the motor shell is of a hollow disc structure, and the centers of two sides of the motor shell are coaxially provided with concave cavities;
a hub provided on one side of the motor housing;
a motor shaft which can rotatably penetrate through the centers of two sides of the motor shell, and one end of the motor shaft can be rotatably arranged in the center of the hub;
the inner gear ring is coaxially arranged in a cavity on one side of the motor shell close to the hub in an interference manner;
the sun gear is sleeved on one side of the motor shaft corresponding to the inner gear ring in an interference manner;
at least one planet gear which is meshed with the inner gear ring and is in meshed transmission with the sun gear;
and the at least one planet shaft can rotatably penetrate through the center of the corresponding planet wheel, and one end of the planet shaft close to the hub is fixedly connected with the hub and is used for driving the hub to rotate.
Preferably, the method further comprises the following steps:
the rotor bracket is arranged in the motor shell and coaxially and fixedly sleeved on the motor shaft;
the permanent magnets are uniformly arranged on the outer side of the rotor bracket in the circumferential direction;
and the motor windings are uniformly arranged on the inner side wall surface of the motor shell in the circumferential direction, correspond to the permanent magnets and are used for driving the rotor support to rotate.
Preferably, the method further comprises the following steps:
the planet carrier is coaxially and rotatably sleeved on a motor shaft between the sun gear and the motor shell;
and the through holes are uniformly arranged on the planet carrier in the circumferential direction, correspond to the planet shafts one to one and are used for fixing one end of the planet shaft away from the hub.
Preferably, the planet shaft includes:
two sets of rollers spaced apart on the planet shaft for rotatably supporting the planet on the planet shaft;
the sleeve is sleeved on the planet shaft between the two groups of rollers;
the first stop block is L-shaped, is sleeved on a planet shaft between the planet carrier and the roller close to the planet carrier, and is parallel to one side of the planet shaft and abutted against the roller, and the other side of the first stop block is abutted against the space between the planet carrier and the side surface of the planet wheel;
the second stop block is L-shaped, is sleeved on the planetary shaft between the hub and the roller close to the hub, and is parallel to one side of the planetary shaft and abutted against the roller, and the other side of the second stop block is abutted against the side face of the planetary wheel close to the hub;
and the positioning sleeve is sleeved on the planet shaft between the planet wheel and the hub, one end of the positioning sleeve is abutted against the hub, and the other end of the positioning sleeve is abutted against the second stop block.
Preferably, the method further comprises the following steps:
the sealing ring is fixedly sleeved on the outer side of the inner gear ring between the inner gear ring and the hub;
the oil seal is fixedly sleeved on the motor shaft close to the rotary connection position of the planet shaft of the hub and the motor shell;
the sealing cover is fixedly arranged at the center of the outer side of the hub;
and the sealing disc is fixedly arranged on the motor shell at the rotary connection position of the planet shaft far away from the wheel hub and the motor shell and is sleeved on the motor shaft in an empty mode.
Preferably, the method further comprises the following steps:
the brake disc is coaxially and fixedly arranged on one side of the motor shaft far away from the hub;
a brake caliper axially movable relative to the brake disc for braking the brake disc;
and the brake caliper seat is fixedly arranged on one side of the motor shell far away from the hub and used for limiting the movement of the brake caliper.
Preferably, the method further comprises the following steps:
the first rib plate and the second rib plate are respectively and circumferentially arranged on the bottom surfaces of the concave cavities in the centers of the two sides of the motor shell;
and the third rib plate is circumferentially arranged outside the rotor bracket.
Preferably, the motor shaft passes through the centers of two sides of the motor shell in a rotatable manner through tapered roller bearings, and one end of the motor shaft is arranged in the center of the hub in a rotatable manner through the tapered roller bearings; the planet carrier is rotatably sleeved on the motor shaft through a tapered roller bearing.
Preferably, the joint of the brake chuck and the motor shaft is axially positioned by a round nut; and the tapered roller bearing at one end of the motor shaft is axially positioned through a round nut.
An electric automobile adopts foretell electronic round of device of big moment of torsion of low-speed.
Beneficial effect:
1. big moment of torsion electric wheel device of low-speed, adopt single-stage planetary gear reducer, the power from the spider output transmits the sun gear via the motor shaft, arrives the planet wheel again, because the ring gear is fixed motionless, so power transmits wheel hub from the planet wheel via the planet axle. Compared with a general electric wheel device with a two-stage planet wheel gear speed reducing mechanism, the device has the advantages that the structure is greatly simplified, the power transmission route is short, the whole vehicle layout space required by the electric wheel drive vehicle adopting the scheme is greatly reduced while the transmission efficiency is improved, the whole vehicle internal space is favorably increased, the unsprung mass is greatly reduced due to the structural simplification, and the adverse effects of the unsprung mass on the ride comfort and the maneuverability of the vehicle are greatly relieved. The brake at the rear end of the motor can be arranged in the concave cavity at the left end of the motor due to the simplification of the structure, and in addition, the load of the brake is reduced due to the speed reduction and torque increase functions of the planetary gear and the fact that the motor can be fully utilized to feed back the braking torque, so that the brake can be smaller, and the braking efficiency requirement of the whole vehicle can be fully met.
2. Electronic round of device of big moment of torsion of low-speed can realize the speed reduction of high-speed inner rotor through the integration to wheel hub motor and planetary gear reduction mechanism and increase the effect of turning round, solved wheel hub motor drive power not enough, automobile starting, the poor problem of climbing nature.
3. Electronic round of device of low-speed big moment of torsion add sealing device, make between motor self, motor and the reduction gear, the sealed problem between reduction gear and the wheel hub can solve, guarantee that electronic round of device can fully lubricate, alleviateed mechanical wear greatly, prolonged the life of electronic round of device again greatly when improving transmission efficiency.
4. The utility model discloses still design and developed an electric automobile, adopted the electronic round of device of low-speed big moment of torsion, when guaranteeing sufficient reduction ratio, the structure is simplified greatly, and the power transmission route is shorter, improves ride comfort and the maneuverability that the car traveles.
Drawings
Fig. 1 is a sectional view of the internal structure of the low-speed large-torque motor wheel apparatus according to the present invention.
Fig. 2 is a cross-sectional view of the internal structure of the motor of the low-speed large-torque motor wheel device of the present invention.
Fig. 3 is a sectional view of the planetary gear reducer of the low-speed large-torque motor wheel apparatus according to the present invention.
Fig. 4 is a front view of a motor shaft structure of the low-speed large-torque motor wheel device according to the present invention.
Fig. 5 is a left side view of the motor shaft structure of the low-speed large-torque motor wheel device according to the present invention.
Fig. 6 is a front view of the planet shaft of the low-speed large-torque motor wheel device according to the present invention.
Fig. 7 is a cross-sectional view taken at a-a in fig. 6.
Fig. 8 is a front view of the labyrinth seal disk of the low-speed high-torque motor wheel assembly of the present invention.
Fig. 9 is a cross-sectional view taken at a-a in fig. 8.
Fig. 10 is a front view of a carrier of the low-speed large-torque motor wheel apparatus according to the present invention.
Fig. 11 is a cross-sectional view taken at a-a in fig. 10.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
The utility model provides an electronic round of device of low-speed big moment of torsion. The hub motor adopts a high-speed inner rotor structure, and in order to realize the characteristic of outputting low-speed large torque, the output end of the hub motor, namely a motor shaft, is connected with a planetary gear reducer, and power is output to a wheel hub after the speed reduction and torque increase of the planetary gear reducer; meanwhile, the integrated planetary gear reducer is completely arranged in a planetary reducer cavity of the hub motor, the structure is compact, the occupied space is small, and the improvement of the space utilization rate and the performance of the whole vehicle is facilitated. And due to the speed reduction and torque increase effects of the planetary gear reducer, the other end of the motor shaft of the hub motor only needs to be provided with a small-size brake, so that the wheel can obtain higher braking strength. And a brake disc in the brake is fixedly connected to a motor shaft through an involute spline, and a brake caliper is fixedly connected to the left motor shell through a bolt.
As shown in fig. 1 to 11, the planetary gear reducer of the present invention is composed of a sun gear 45, a planet gear 35, a planet shaft 36, a planet carrier 32, and an inner gear ring 34; the sun gear 45 is fixedly sleeved on the motor shaft 11 through interference fit and rotates synchronously with the motor shaft 11, the planet gear 35 is supported on the planet shaft 36 through a roller 50, one end of the planet shaft 36 is supported on the planet carrier 32, the other end of the planet shaft is embedded in the hub 30, the planet carrier 32 is supported on the motor shaft through a tapered roller bearing 37, and the inner gear ring 34 is pressed in a cavity of the right motor shell 1 and forms a fixed part with the right motor shell 1; whole planetary gear reducer is whole to be embedded in the cavity of right motor casing 1, and labyrinth seal structure and brake disc 7 are embedded in left motor casing 2 simultaneously, so whole electronic round's size does not increase how much because of integrated in-wheel motor, planetary gear reducer and stopper.
The wheel hub motor of the utility model consists of a left motor shell 2, a right motor shell 1, a rotor bracket 3 and a motor shaft 11; wherein, the rotor bracket 3 is connected with the motor shaft 11 through an inner hexagonal socket head cap screw 22; the left motor shell 2 is sunken inwards to form a concave cavity so as to integrate a brake, the labyrinth sealing disc 12 is connected with the left motor shell 2 through a hexagon head bolt-B stage 15, and the left motor shell 2 and the motor shaft 11 are sealed through a labyrinth sealing device formed by the labyrinth sealing disc 12 and a labyrinth sealing round nut 13; the right motor case 1 is recessed inward to form a cavity for integrating the planetary gear reducer, and the right motor case 1 is supported on the motor shaft 11 by a tapered roller bearing 37.
The power output from the rotor holder 3 is transmitted to the sun gear 45 and then to the planetary gear 35 via the motor shaft 11, and since the ring gear 34 is fixed, the power is directly transmitted from the planetary shaft 36 to the hub 30 and finally to the wheel via the hub 30.
The hub motor structure also comprises a motor winding 25 and a permanent magnet 24; the motor winding 25 is attached to the right motor casing 1, the permanent magnet 24 is fixed on the rotor support 3, the left motor casing 2 is supported on the motor shaft 11 through the tapered roller bearing 8, and the J-shaped frameless rubber oil seal 5 is arranged among the right motor casing 1, the tapered roller bearing 37 and the motor shaft 11 for sealing.
The motor wheel structure also comprises a brake disc 7, a brake caliper 18 and a brake caliper seat 19, and a floating caliper disc brake is adopted; the brake disc 7 is fixedly connected to the motor shaft 11 through an involute spline, and is axially positioned through the round nut 9 and a shaft shoulder on the motor shaft 11; the brake caliper 18 can move left and right in the brake caliper seat 19, friction plates 16 are arranged on two sides of the brake caliper, the friction plate 16 far away from one side of the brake disc 7 is connected with an oil cylinder 17 and used for pushing the friction plate 16 to move for braking, and the brake caliper seat 19 is fixed on a shell of the left motor shell 2 through bolt connection. The floating caliper disc brake used in this embodiment is a common brake in the prior art, and therefore, the specific structure and the working principle thereof are not described herein again.
The planetary gear reducer structure also comprises a roller 50, a sleeve 47, an L-shaped stop 49, a positioning sleeve 48 and a shaft circlip-A level 46; wherein each two sets of rollers 50 support a planet wheel 35 on a planet axle 36; the sleeve 47 is positioned between the two sets of rollers 50 to space the two sets of rollers 50; the two L-shaped stoppers 49 are respectively positioned at the outer sides of the two groups of rollers 50, one side of each L-shaped stopper is propped against the rollers 50, and the other side of each L-shaped stopper is propped against the side surface of the planetary wheel 35, and are used for axially positioning the rollers 50; then the other side of the left L-shaped block 49 is attached to the planet carrier 32, the other side of the right L-shaped block 49 is propped against one side of the positioning sleeve 48, and the other side of the positioning sleeve 48 is propped against the hub 30; the planet shaft 36 is subjected to diameter-changing treatment at the assembly position of the planet carrier 32, and can act together with the shaft elastic retainer ring-A level 46 to prevent the planet shaft 36 from axially moving; the axial positioning of the planet wheels 35 is thus ensured by the sleeve 47, the rollers 50, the L-shaped stop 49, the positioning sleeve 48, the planet carrier 32 and the circlip for the shaft-a stage 46.
The hub 30 is supported on the motor shaft 11 through a tapered roller bearing 44, and the tapered roller bearing 44 is pre-tightened and positioned through a round nut 42; the outside of round nut 42 is provided with sealed apron 43 and seal gasket 38, and sealed apron 43 passes through hexagon head bolt-B level 40 fixed connection on wheel hub 30, sets up the interior frame sealing washer 33 of taking the minor lip between internal gear ring 34 and wheel hub 30 simultaneously, has guaranteed the sealed of planetary reducer chamber outside.
Specifically, the method comprises the following steps:
as shown in fig. 1, the rotor bracket 3 is fixed on the motor shaft 11 through an inner hexagonal socket head cap screw 27, the motor shaft 11 is in interference fit with the sun gear 45, and the sun gear 45 is positioned through a shaft shoulder; then the sun wheel 45 is meshed with the planet wheel 35, the planet wheel 35 is supported on the planet shaft 36 through a roller 50, one side of the planet wheel 35 props against the planet carrier 32 through an L-shaped stop block 49, and the other side of the planet wheel 35 props against the hub 30 through a positioning sleeve 48, so that axial positioning is realized; the rollers 50 are separated by a sleeve 47 in the middle and positioned by L-shaped stoppers 49 on both sides; one side of the planet shaft 36 is sleeved by the planet carrier 32, the shaft is clamped and positioned by an elastic retainer ring-A level 46, and the other side is embedded on the hub 30; then the planet gear 35 is also meshed with an inner gear ring 34, the inner gear ring 34 is pressed and fixed in the cavity of the right motor shell 1, and an inner-bag framework sealing ring 33 with an auxiliary lip is arranged between the inner gear ring 34 and the hub 30 for sealing; the hub 30 is supported on the motor shaft 11 through a tapered roller bearing 44, one end of the tapered roller bearing 44 is pressed against the shoulder of the hub 30, and the other end is pre-tightened and positioned by a stop washer 41 through a round nut 42 and the round nut; the outer side of the hub 30 is provided with a sealing cover plate 43 and a sealing gasket 38 for sealing, and the sealing cover plate 43 is fixed on the hub 30 by a hexagon head bolt-B level 40; the planet carrier 32 is supported on the motor shaft 11 through a tapered roller bearing 37, the two tapered roller bearings 37 are arranged back to back and are one in size and type, and then the two tapered roller bearings are loaded and positioned through the right motor shell 1; a J-shaped frameless rubber oil seal 5 is arranged between the right motor shell 1, the tapered roller bearing 37 and the motor shaft 11; thus, the sealing of the whole planetary reducer cavity is ensured by the sealing ring 33 with the auxiliary lip internally wrapped with the framework, the J-shaped frameless rubber oil seal 5, the sealing cover plate 43 and the sealing gasket 38; the left motor shell 2 is supported and positioned on a motor shaft 11 through a tapered roller bearing 8, the tapered roller bearing 8 is fixed and pre-tightened on the motor shaft 11 through a labyrinth seal round nut 13 and a round nut by a stop washer 14, and simultaneously, the labyrinth seal round nut 13 and a labyrinth seal disc 12 are combined to form a labyrinth seal structure which is combined with a J-shaped frameless rubber oil seal 5 to ensure the sealing of a motor cavity; and finally, the brake disc 7 is fixedly connected with a motor shaft 11 through an involute spline, the outer side of the brake disc is fixed and pre-tightened on the inner side of the motor shaft 11 through a round nut 10 and a round nut by using a stop washer 9, and a brake caliper seat 19 is fixedly connected on the shell wall of the left motor shell 2 through a bolt.
As shown in fig. 2, the motor winding 25 is attached to the right motor casing 1, the permanent magnet 24 is fixed on the rotor bracket 3, and the rotor bracket 3 is fixedly connected with the motor shaft 11 through an inner hexagonal socket head cap screw 27 and rotates synchronously; the left motor shell 2 and the right motor shell 1 are fixedly connected together through a stud 22 and a hexagonal thin nut 21, and the left motor shell 2 and the right motor shell 1 are respectively sunken inwards to form a concave cavity so as to integrate a brake and a planetary gear reducer; in order to improve the strength of the hub motor, reinforcing ribs 26, 31 and 4 are respectively arranged on the left motor shell 2, the right motor shell 1 and the rotor bracket 3; the left motor shell 2 is supported and positioned on a motor shaft 11 through a tapered roller bearing 8, a labyrinth seal disc 12 is connected with the left motor shell 2 through a hexagon head bolt-B stage 15, the seal between the left motor shell 2 and the motor shaft 11 is ensured by a labyrinth seal structure by depending on the outer side of the tapered roller bearing 8, and the labyrinth seal structure consists of a labyrinth seal disc 12 and a labyrinth seal round nut 13; the right motor shell is supported on the motor shaft 11 through a tapered roller bearing 37, and sealing is guaranteed among the right motor shell 1, the tapered roller bearing 37 and the motor shaft 11 by means of a J-shaped frameless rubber oil seal 5.
As shown in fig. 3, the sun gear 45 is sleeved on the motor shaft 11 by interference fit, and is axially positioned by a shoulder on the motor shaft 11 to rotate synchronously with the motor shaft 11; the planet carrier 32 is sleeved at one end of the planet shaft 36, and is clamped and limited by an elastic retainer ring-A level 46 for the shaft; the carrier 32 is rotatably supported on the planet shaft 11 by a tapered roller bearing 37; the inner gear ring 34 is pressed in the concave cavity of the right motor shell 1 and is fixed; one end of the planet shaft 36 is clamped in the planet carrier 32, and the other end of the planet shaft is embedded in the hub 30 and used for driving the hub 30 to rotate; the planet wheel 35 is supported on the planet shaft 36 through a roller 50 and is axially positioned by virtue of an L-shaped stop 49 and a positioning sleeve 48; the hub 30 is supported on the motor shaft 11 through a tapered roller bearing 44, and the tapered roller bearing 44 is fixed by a round nut 42 and a stop washer 41 for the round nut; a sealing cover plate 43 and a sealing gasket 38 are arranged on the outer side of the hub 30, and meanwhile, an inner wrapping framework sealing ring 33 with an auxiliary lip is arranged between the hub 30 and the inner gear ring 34, so that sealing on the outer side of a cavity of the planetary speed reducer is guaranteed.
As shown in fig. 4 and 5, the structure of the motor shaft 11 is shown, wherein the bolt section a is mainly used for assembling the stop washer 9 and the round nut 10 for the round nut; the involute spline section b is mainly used for assembling the brake disc 7; the bolt section c is mainly used for assembling a stop washer 14 for the round nut and a labyrinth seal round nut 13; the bolt hole section d is used as a part fixedly connected with the rotor bracket 3; the optical axis section e is mainly connected with the sun gear 45 in an interference fit manner; the bolt segment f is mainly used for assembling the lock washer 41 and the round nut 42 for the round nut.
As shown in fig. 8 and 9, the labyrinth seal disk 12 is fixedly connected to the left motor case 2 by the hexagon head bolt-B stage 15, and is in clearance fit with the motor shaft 11.
Fig. 10 and 11 show the structure of the carrier 32, in which the small diameter a is engaged with the outer ring of the tapered roller bearing 37; the through-hole b is fitted with the planet shaft 36.
The working process of the present invention is described in detail below with reference to fig. 1:
as shown in fig. 1, the low-speed large-torque electric wheel device of the present invention integrates a planetary gear reducer and a brake into a high-speed inner rotor hub motor, specifically, into a cavity of the hub motor, and then integrally assembles the integrated hub motor, planetary gear reducer and brake into a wheel rim; the left motor shell 2 and the right motor shell 1 are fixed parts, the rotor bracket 3 transmits power to the motor shaft 11 through the hexagon socket head cap screws 27, and the output of the hub motor is high-speed low-torque; then the motor shaft 11 drives the sun gear 45 to synchronously rotate through interference, and power is transmitted to the planetary reducer; then, the power is transmitted to the hub 30 through the sun gear 45, the planet gears 35 and the planet shaft 36, and finally is output through the wheel rim 23 (the rim 23 and the hub 30 are connected through the bolts 29), at this time, the output of the hub motor is subjected to the speed reduction and torque increase action of the planetary gear reducer, and the output of the hub end is changed into a low-speed and high-torque state.
The utility model provides a wheel hub motor adopts high-speed low moment of torsion inner rotor structure to in the cavity with stopper and planetary gear reducer integration to motor self, do not additionally occupy the space beyond the wheel. The power output by the hub motor is reduced and torque is increased through the speed reduction function of the planetary reducer, and the output of the hub end of the wheel is changed into a low-speed and high-torque state, so that the dynamic property of the vehicle driven by the electric wheel is greatly improved. And simultaneously, for the electronic round of device of generally adopting two-stage planetary gear reducer, the utility model discloses a single-stage planetary gear reducer when guaranteeing sufficient reduction ratio, the structure is simplified greatly, and power transmission route is shorter, has reduced the required whole car arrangement space of electronic round of drive car of this scheme of adoption when improving transmission efficiency greatly, is favorable to increasing whole car inner space, also because the great reduction of simplification of structure the unsprung mass, has greatly alleviated the harmful effects of unsprung mass to the ride comfort and the maneuverability that the car went.
The utility model also provides an electric automobile, use the electric wheel structure carry out driven electric automobile.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (10)
1. A low-speed large-torque electric wheel device, comprising:
the motor shell is of a hollow disc structure, and the centers of two sides of the motor shell are coaxially provided with concave cavities;
a hub provided on one side of the motor housing;
a motor shaft which can rotatably penetrate through the centers of two sides of the motor shell, and one end of the motor shaft can be rotatably arranged in the center of the hub;
the inner gear ring is coaxially arranged in a cavity on one side of the motor shell close to the hub in an interference manner;
the sun gear is sleeved on one side of the motor shaft corresponding to the inner gear ring in an interference manner;
at least one planet gear which is meshed with the inner gear ring and is in meshed transmission with the sun gear;
and the at least one planet shaft can rotatably penetrate through the center of the corresponding planet wheel, and one end of the planet shaft close to the hub is fixedly connected with the hub and is used for driving the hub to rotate.
2. The low-speed high-torque electric wheel apparatus according to claim 1, further comprising:
the rotor bracket is arranged in the motor shell and coaxially and fixedly sleeved on the motor shaft;
the permanent magnets are uniformly arranged on the outer side of the rotor bracket in the circumferential direction;
and the motor windings are uniformly arranged on the inner side wall surface of the motor shell in the circumferential direction, correspond to the permanent magnets and are used for driving the rotor support to rotate.
3. The low-speed high-torque electric wheel apparatus according to claim 1 or 2, further comprising:
the planet carrier is coaxially and rotatably sleeved on a motor shaft between the sun gear and the motor shell;
and the through holes are uniformly arranged on the planet carrier in the circumferential direction, correspond to the planet shafts one to one and are used for fixing one end of the planet shaft away from the hub.
4. The low-speed high-torque electric wheel device according to claim 3, wherein the planet axle comprises:
two sets of rollers spaced apart on the planet shaft for rotatably supporting the planet on the planet shaft;
the sleeve is sleeved on the planet shaft between the two groups of rollers;
the first stop block is L-shaped, is sleeved on a planet shaft between the planet carrier and the roller close to the planet carrier, and is parallel to one side of the planet shaft and abutted against the roller, and the other side of the first stop block is abutted against the space between the planet carrier and the side surface of the planet wheel;
the second stop block is L-shaped, is sleeved on the planetary shaft between the hub and the roller close to the hub, and is parallel to one side of the planetary shaft and abutted against the roller, and the other side of the second stop block is abutted against the side face of the planetary wheel close to the hub;
and the positioning sleeve is sleeved on the planet shaft between the planet wheel and the hub, one end of the positioning sleeve is abutted against the hub, and the other end of the positioning sleeve is abutted against the second stop block.
5. The low-speed high-torque electric wheel apparatus according to claim 4, further comprising:
the sealing ring is fixedly sleeved on the outer side of the inner gear ring between the inner gear ring and the hub;
the oil seal is fixedly sleeved on the motor shaft close to the rotary connection position of the planet shaft of the hub and the motor shell;
the sealing cover is fixedly arranged at the center of the outer side of the hub;
and the sealing disc is fixedly arranged on the motor shell at the rotary connection position of the planet shaft far away from the wheel hub and the motor shell and is sleeved on the motor shaft in an empty mode.
6. The low-speed high-torque electric wheel apparatus according to claim 4 or 5, further comprising:
the brake disc is coaxially and fixedly arranged on one side of the motor shaft far away from the hub;
a brake caliper axially movable relative to the brake disc for braking the brake disc;
and the brake caliper seat is fixedly arranged on one side of the motor shell far away from the hub and used for limiting the movement of the brake caliper.
7. The low-speed high-torque electric wheel apparatus according to claim 2, further comprising:
the first rib plate and the second rib plate are respectively and circumferentially arranged on the bottom surfaces of the concave cavities in the centers of the two sides of the motor shell;
and the third rib plate is circumferentially arranged outside the rotor bracket.
8. The low-speed high-torque electric wheel device according to claim 6, wherein the motor shaft is rotatably inserted through centers of both sides of the motor housing by tapered roller bearings, and one end is rotatably disposed at a center of the hub by tapered roller bearings; the planet carrier is rotatably sleeved on the motor shaft through a tapered roller bearing.
9. The low-speed high-torque electric wheel device according to claim 8, wherein the junction of the brake disc and the motor shaft is axially positioned by a round nut; and the tapered roller bearing at one end of the motor shaft is axially positioned through a round nut.
10. An electric vehicle, characterized in that a low-speed large-torque electric wheel apparatus according to any one of claims 1 to 9 is employed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920804812.XU CN209987734U (en) | 2019-05-31 | 2019-05-31 | Low-speed large-torque electric wheel device and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920804812.XU CN209987734U (en) | 2019-05-31 | 2019-05-31 | Low-speed large-torque electric wheel device and electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154737A (en) * | 2019-05-31 | 2019-08-23 | 吉林大学 | A kind of electronic wheel apparatus of low-speed big and electric car |
| CN113124135A (en) * | 2021-04-25 | 2021-07-16 | 湖南力行动力科技有限公司 | Small-sized light-weight high-power heavy-load electric wheel lubricating and sealing method and structure |
-
2019
- 2019-05-31 CN CN201920804812.XU patent/CN209987734U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110154737A (en) * | 2019-05-31 | 2019-08-23 | 吉林大学 | A kind of electronic wheel apparatus of low-speed big and electric car |
| CN113124135A (en) * | 2021-04-25 | 2021-07-16 | 湖南力行动力科技有限公司 | Small-sized light-weight high-power heavy-load electric wheel lubricating and sealing method and structure |
| CN113124135B (en) * | 2021-04-25 | 2023-03-10 | 湖南力行动力科技有限公司 | Lubrication sealing method and structure for small-sized light-weight high-power heavy-load electric wheel |
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