CN218616218U

CN218616218U - Electric wheel

Info

Publication number: CN218616218U
Application number: CN202222624161.0U
Authority: CN
Inventors: 张芳; 肖鸿伟; 杜成顺
Original assignee: Huayi Power Technology Dongguan Co ltd
Current assignee: Huayi Power Technology Dongguan Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-14
Anticipated expiration: 2032-09-30

Abstract

The utility model relates to an electric wheel, which comprises a motor, a speed reducer and a wheel hub, wherein the speed reducer drives the wheel hub after reducing the output of the motor, and the speed reducer is arranged on the motor along the axial direction of the motor; the magnetic positioning piece is arranged on the hub and rotates along with the hub; and the speed reducer or the position of the motor close to the wheel hub is provided with a proximity sensor, and the proximity sensor is used for sensing the magnetic positioning piece. The utility model discloses install wheel hub with the magnetism setting element and let the magnetism setting element rotate along with wheel hub. The speed can be detected by the magnetic positioning piece induced by the proximity sensor arranged on the speed reducer or the motor, and the speed measurement scheme is simplified.

Description

Electric wheel

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric vehicle field, more specifically relates to an electronic round.

[ background ] A method for producing a semiconductor device

The electric vehicle is popularized and popularized with the advantages of environmental protection, safety and the like, and is applied to various fields of life and production. Electric wheels are being widely used as core components of electric vehicles and are being modified according to specific needs. The low-speed logistics vehicle is applied to environments such as warehouses, logistics transfer stations and the like, generally has the speed of not higher than 60km/h and the load within the range of 200-800 kg. In the prior art, the rotating speed of a motor or the rotating speed of a reduction gearbox is often monitored and then converted into the vehicle speed. The vehicle speed detection scheme relates to more conversion processes, and has more variables and is not accurate enough.

[ Utility model ] content

The utility model discloses a scheme of testing the speed of electronic round is improved to an aim at.

Therefore, the utility model provides an electric wheel, which comprises a motor, a speed reducer and a wheel hub, wherein the speed reducer drives the wheel hub after reducing the speed of the output of the motor, and the speed reducer is arranged on the motor along the axial direction of the motor; the magnetic positioning piece is arranged on the hub and rotates along with the hub; and the speed reducer or the position of the motor close to the wheel hub is provided with a proximity sensor, and the proximity sensor is used for sensing the magnetic positioning piece.

In one embodiment of the invention, the proximity sensor is mounted in the housing of the speed reducer or in the motor housing.

In an embodiment of the present invention, the speed reducer is a planetary gear box, the planetary gear box is mounted to the shaft end of the motor, and the housing of the planetary gear box is fixed to the housing of the motor.

In one embodiment of the present invention, the planetary gear box comprises a sun gear, a plurality of planet gears surrounding the sun gear and engaged with the sun gear, an inner gear ring surrounding the plurality of planet gears and engaged with the plurality of planet gears, a rotating frame for mounting the plurality of planet gears; the inner gear ring is fixed with the shell of the motor.

In an embodiment of the present invention, the ring gear includes a first ring body and a second ring body, which are stacked together in an axial direction of the motor; axial screws or bolts pass through the first and second rings and secure the first and second rings to the housing of the electric machine.

In one embodiment of the invention, the hub comprises a spoke and an annular rim, the outer end of the spoke being connected to the rim; the magnetic positioning element is mounted to the rim.

In an embodiment of the present invention, the spoke is located on one side of the annular rim, so that an accommodating cavity is formed between the inner side of the rim and the spoke, and the planetary gear box is accommodated in the accommodating cavity; the magnetic positioning piece is arranged on the position, close to the opening of the containing cavity, of the wheel rim.

In an embodiment of the invention, the proximity sensor is mounted inside the motor housing.

In one embodiment of the present invention, the planetary gear box includes a sun gear, a plurality of planetary gears surrounding and engaged with the sun gear, a turret driven by the plurality of planetary gears to revolve around the sun gear; one end of the swivel is adjacent to and secured to the spoke.

In an embodiment of the present invention, the magnetic positioning member is a magnetic conductive screw or a bolt.

The utility model discloses install wheel hub with the magnetism setting element and let the magnetism setting element rotate along with wheel hub. The speed can be detected by the magnetic positioning piece induced by the proximity sensor arranged on the speed reducer or the motor, and the speed measurement scheme is simplified.

[ description of the drawings ]

Fig. 1 and 2 are schematic views respectively illustrating different viewing angles of a power wheel provided in an embodiment of the present invention;

fig. 3 and 4 arebase:Sub>A schematic end plan view andbase:Sub>A schematicbase:Sub>A-base:Sub>A sectional view of the electric wheel shown in fig. 1, respectively;

FIG. 5 is an exploded schematic view of the motorized wheel of FIG. 1, including a drive assembly including a motor and a speed reducer, and a wheel hub;

FIG. 6 is an exploded schematic view of the drive arrangement of FIG. 5 including a motor and speed reducer;

FIGS. 7 and 8 are schematic end plan views and schematic B-B cross-sectional views, respectively, of the motor of FIG. 6;

FIGS. 9 and 10 are schematic views of a cylindrical housing, end cap, respectively, for use with the motor of FIG. 6;

fig. 11 and 12 are a schematic view and an exploded schematic view of the driving apparatus shown in fig. 6, including a motor main body and a decelerator, respectively, with a cylindrical case of the motor removed;

fig. 13 and 14 are a plan view and a C-C sectional view, respectively, of the motor body shown in fig. 12;

fig. 15 is a schematic view of a rotor of the motor body shown in fig. 12;

FIG. 16 is a schematic view of the rotor of FIG. 15 with the cylindrical housing removed;

FIG. 17 is a schematic view of the permanent magnets and the sheath used in the rotor of FIG. 15;

fig. 18 and 19 are a schematic view and a sectional view, respectively, of a stator used in the motor main body shown in fig. 12;

fig. 20 is a schematic view of a brake used in the motor main body shown in fig. 12;

FIGS. 21 and 22 are a plan view and a D-D sectional view, respectively, of the retarder of FIG. 12;

fig. 23 and 24 are schematic views of different views of a rotating stand used in the decelerator shown in fig. 12, respectively.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and examples.

As shown in fig. 1 and 2, the electric wheel 100 includes a driving device including a motor 30 and a speed reducer 70 (see fig. 4) and a wheel hub 10. The reducer 70 reduces the speed of the output of the motor 30 to drive the hub 10. The electric wheel 100 of the present embodiment is used for a low-speed logistics vehicle, but the present invention provides an electric wheel 100 not limited to this field.

As shown in fig. 3 to 5, the speed reducer 70 is mounted to the motor 30 in the axial direction of the motor 30. The hub 10 is fitted with a plurality of magnetic locators 18, the magnetic locators 18 rotating with the hub 10. The motor 30 is mounted with a proximity sensor 39 near the hub 10, the proximity sensor 39 being used to sense the magnetic positioning member 18. Alternatively, the magnetic locator 18 may be mounted to the reducer 70 at a location against the hub 10. In the present embodiment, the housing of the motor 30, for example, the cylindrical housing 37 or the housing of the reduction gear 70, is not rotated, and therefore, the proximity sensor 39 may be mounted in the housing of the planetary gear box or in the housing of the motor 30.

In the present embodiment, the speed reducer 70 is a planetary gear box, which is attached to the shaft end of the motor 30, and the housing of the planetary gear box is fixed to the housing of the motor 30, for example, the cylindrical housing 37. As shown in fig. 4, the open end of the cylindrical housing 37 is snap-fitted to the end cap 32 and forms a closed receiving chamber 38 (see fig. 9) with the end cap 32. The stator and rotor of the motor 30 are received in the receiving cavity 38. The rotation shaft 52 of the rotor passes through the center of the bottom of the cylindrical housing 37 and is supported by the bottom in a rolling manner. One end of the rotation shaft 52 extends into the decelerator 70. The housing of the planetary gearbox is connected to the cylindrical housing 37 of the motor 30 by a number of axial connections, such as screws 76.

As shown in fig. 5, the hub 10 includes spokes 14 and an annular rim 12, the outer ends of the spokes 14 being connected to the rim 12. The rim 12 is used for mounting the rubber wheel 11. The magnetic locator 18 may be mounted to the rim 12. The spokes 14 are located on one side of the annular rim 12, forming a receiving cavity 38 between the inside of the rim 12 and the spokes 14. The planetary gear box is received in the receiving cavity 38. Bolts 16 or screws pass through the spokes 14 and connect to the turret of the planetary gearbox to receive drive from the planetary gearbox. The magnetic positioning members 18 are mounted on the rim 12 near the opening of the receiving cavity 38, and in this embodiment, the magnetic positioning members 18 are arranged uniformly along the circumference of the opening of the receiving cavity 38. The magnetic positioning element 18 is a magnetically conductive screw or bolt that is screwed into the rim 12 in the axial direction of the motor 30. The utility model discloses install magnetic positioning element 18 to wheel hub 10 and let magnetic positioning element 18 rotate along with wheel hub 10. The speed can be detected by sensing the magnetic positioning element 18 through the proximity sensor 39 mounted to the speed reducer 70 or the motor 30, simplifying the speed measurement scheme.

As shown in fig. 6, the driving device of the electric wheel 100 includes a motor 30 and a speed reducer 70. The speed reducer 70 is a planetary gear box, and a sun gear 71 thereof is formed at one end of the rotation shaft 52.

As shown in fig. 7 to 10, the main body of the end cap 32 is plate-shaped, and the middle of the main body extends out of the bracket 33 along the motor axial direction. The stator 31 is supported by the bracket 33 and is accommodated in the rotor 51, and the rotor 51 is accommodated in the accommodation chamber 38 surrounded by the cylindrical case 37 and the end cover 32. The rotation shaft 52 of the rotor 51 is mounted to the end cover 32 or the bracket 33, and the center of the bottom of the cylindrical housing 37 via a first bearing 67 and a second bearing 69, respectively, so that the rotor 51 can rotate relative to the stator 31, the end cover 32, and the cylindrical housing 37.

As shown in fig. 11 to 17, the rotor 51 includes a rotating shaft 52, a cylindrical case 53, a rotor core 56, and a permanent magnet 58. The cylindrical housing 53 includes a non-magnetic ring body 55 surrounding the rotating shaft 52 and a bottom plate 54 fixedly connected to one end of the ring body 55. The center of the base plate 54 is penetrated by the rotation shaft 52 and rotated in synchronization with the rotation shaft 52. The rotor core 56 is formed by stacking a plurality of annular laminations in the axial direction. Rotor core 56 is mounted to the inner wall of ring body 55, and permanent magnets 58 are mounted to the inner wall of rotor core 56. The rotor core 56 is formed by stacking a plurality of annular laminations in the axial direction, and the rotor core 56 is mounted to the non-magnetic ring body 55 to reduce eddy current loss.

As shown in fig. 8, 10, 14 and 15, the stator 31 (see fig. 8) includes a stator core 35 sleeved to the outer circumference of the bracket 33 (see fig. 10), and a stator winding wound around the stator core 35. The stator core 35 is accommodated in a cylindrical case 53 of the rotor 51.

As shown in fig. 15 to 17, the rotor 51 further includes an annular sheath 61. The sheath 61 is mounted coaxially with the rotor core 56 in the cylindrical case 53, and the permanent magnet 58 is sandwiched between the sheath 61 and the rotor core 56. The sheath 61 includes a ring-shaped main body 63, and the main body 63 sandwiches the permanent magnet 58 between the sheath 61 and the rotor core 56. The main body 63 has an outwardly projecting flange 65 on the side remote from the base plate 54 to prevent the permanent magnet 58 from falling out. Preferably, one axial end of the permanent magnet 58 abuts against the flange 65.

In this embodiment, the permanent magnets 58 are a plurality of blocks, and the plurality of permanent magnets 58 are uniformly distributed along the circumferential direction of the rotor core 56. The sheath 61 is a one-piece whole made of stainless steel material or carbon fiber. Preferably, the sheath 61 is fitted in a slight fit. The sheath 61 may be fixedly connected with the permanent magnet 58 and the rotor core 56 in an adhesive manner.

As shown in fig. 10 and 18 to 20, the holder 33 of the end cap 32 is cylindrical, and a normally closed brake 90 is mounted therein. The body 91 of the brake 90 is fixedly coupled to the cover 32 or the bracket 33, and the friction disc 93 of the brake 90 rotates in synchronization with the rotation of the rotating shaft 52. When the motor 30 is powered off, the normally closed brake 90 locks the friction disc 93, so as to prevent the rotating shaft 52 from rotating and prevent the electric vehicle from sliding when the electric vehicle is powered off.

As shown in fig. 12 and fig. 21 to 24, the speed reducer 70 is a planetary gearbox including a sun gear 71, a plurality of planetary gears 73 surrounding the sun gear 71 and engaged with the sun gear 71, an inner ring gear 75 surrounding the plurality of planetary gears 73 and engaged with the plurality of planetary gears 73, and a rotating frame 80 for mounting the plurality of planetary gears 73. Understandably, the plurality of planet wheels 73 are driven by the sun gear, and revolve around the sun gear 71 under the constraint of the internal gear ring 75, so as to drive the rotating frame 80 to rotate around the sun gear 71.

In this embodiment, the ring gear 75 is fixed to the housing of the motor 30. More specifically, the housing of the planetary gearbox is connected to the housing of the motor 30 by a number of axial connections, such as screws or bolts 76. The turret 80 is rollingly supported by the outer casing of the planetary gearbox by bearings. Therefore, the strength of the driving device perpendicular to the axial direction of the motor is improved.

In this embodiment, the turret 80 includes a barrel 83 and first and

second supports

81, 82 located within the barrel 83 and spaced axially along the motor 30. The planetary wheels 73 are rotatably mounted in the rotating frame 80, and both ends of the central axis of each planetary wheel 73 are supported by a first carrier 81 and a second carrier 82, respectively. The carrier 80 is supported by the planetary gear case in a rolling manner at positions on both axial sides of the planetary gear 73 via third and

fourth bearings

77 and 79, respectively.

In this embodiment, the cylinder 83 of the rotating frame 80 has a plurality of hollow-outs 84 to allow the plurality of planet gears 73 to mesh with the inner gear ring 75 through the hollow-outs 84. The annulus gear 75 is part of the outer casing of the planetary gearbox. Understandably, the ring gear 75 may be formed separately from the housing of the planetary gear box.

In the present embodiment, the housing of the planetary gear box includes the first ring member 75a and the second ring member 75b, and the first ring member 75a and the second ring member 75b are overlapped in the axial direction of the motor 30. An axial connector, such as a screw or bolt 76, fixedly connects the first and

second rings

75a, 75b to the housing of the motor 30.

In this embodiment, the rotating frame 80 further includes a connecting portion 86, and the connecting portion 86 is connected to the second bracket 82; the connecting portion 86, the second bracket 82, and the first bracket 81 are sequentially arranged in the axial direction of the motor 30 and form a one-piece body. The connection portion 86 extends a predetermined length in the axial direction of the motor 30 to provide a screw hole 87 or a through hole for an axial screw or bolt to penetrate, which is used to connect an object to be driven. In the present invention, a power wheel 100 is provided in which the connecting portion 86 of the turret 80 is adjacent to the spoke 14 and is fixed to the spoke 14.

The above examples only represent preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, such as combinations of different features in the various embodiments, which are within the scope of the present invention.

Claims

1. An electric wheel comprising an electric motor (30), a speed reducer (70), and a wheel hub (10), the speed reducer (70) reducing an output of the electric motor (30) to drive the wheel hub (10), characterized in that the speed reducer (70) is mounted to the electric motor (30) in an axial direction of the electric motor (30); a magnetic positioning piece (18) is arranged on the hub (10), and the magnetic positioning piece (18) rotates along with the hub (10); and a proximity sensor (39) is installed at the position, close to the hub (10), of the speed reducer (70) or the motor (30), and the proximity sensor (39) is used for sensing the magnetic positioning piece (18).

2. The electric wheel according to claim 1, characterized in that said proximity sensor (39) is mounted in the housing of said reducer (70) or in the housing of said electric motor (30).

3. An electric wheel according to claim 1, characterized in that the reducer (70) is a planetary gearbox mounted to the shaft end of the electric motor (30), the housing of the planetary gearbox being fixed to the housing of the electric motor (30).

4. An electric wheel according to claim 3, characterized in that the planetary gearbox comprises a sun wheel (71), a number of planet wheels (73) surrounding the sun wheel (71) and meshing with the sun wheel (71), an inner ring gear (75) surrounding the number of planet wheels (73) and meshing with the number of planet wheels (73), a turret (80) for mounting the number of planet wheels (73); the inner gear ring (75) is fixed with the shell of the motor (30).

5. The electric wheel according to claim 4, characterized in that said annular gear (75) comprises a first ring (75 a) and a second ring (75 b), said first ring (75 a) and second ring (75 b) being superposed together in the axial direction of said electric motor (30); axial screws or bolts (76) pass through the first and second rings (75 a, 75 b) and secure the first and second rings (75 a, 75 b) to the housing of the motor (30).

6. The motorized wheel according to claim 3, characterized in that the hub (10) comprises a spoke (14) and an annular rim (12), the outer end of the spoke (14) being connected to the rim (12); the magnetic positioning element (18) is mounted to the rim (12).

7. The electric wheel according to claim 6, characterized in that said spokes (14) are located on one side of said annular rim (12) so as to form a housing cavity (38) between the inside of said rim (12) and said spokes (14), said planetary gearbox being housed in said housing cavity (38); the magnetic positioning element (18) is mounted to the rim (12) at a location proximate to the opening of the receiving cavity (38).

8. The electric wheel according to claim 6, characterized in that said proximity sensor (39) is mounted inside said motor (30) casing.

9. An electric wheel according to claim 6, characterized in that the planetary gearbox comprises a sun wheel (71), a number of planet wheels (73) which encircle the sun wheel (71) and are in mesh with the sun wheel (71), a turret (80) which is driven by the number of planet wheels (73) to revolve around the sun wheel (71); one end of the turret (80) is proximate the spoke (14) and is secured to the spoke (14).

10. A motorized wheel according to claim 1, characterised in that said magnetic positioning element (18) is a magnetically conductive screw or bolt.