CN219164379U

CN219164379U - Hub motor

Info

Publication number: CN219164379U
Application number: CN202223612800.8U
Authority: CN
Inventors: 杨立云; 陆益栋; 张伟; 高东益; 刘奇; 张高荣; 许斌; 万亚勇
Original assignee: Ningbo Zhongda Leader Intelligent Transmission Co ltd
Current assignee: Ningbo Zhongda Leader Intelligent Transmission Co ltd
Priority date: 2022-11-07
Filing date: 2022-12-30
Publication date: 2023-06-09
Anticipated expiration: 2032-12-30
Also published as: CN116032066A; CN219082217U

Abstract

The application relates to a hub motor belongs to motor technical field, and it includes motor body, electromagnetism and embraces the subassembly and the encoder subassembly of stopping, motor body is including having the motor housing who holds the chamber, electromagnetism embraces the subassembly of stopping and the encoder subassembly all is located hold the accent department of chamber and install in hold the intracavity, electromagnetism embraces the brake subassembly including having the brake body of installation cavity, electric brake body lid is located hold the accent department of chamber, the encoder subassembly install in the intracavity. The application has the effect of reducing the size of the motor after installing the encoder and having the manual release electromagnetic brake mechanism.

Description

Hub motor

Technical Field

The application relates to the technical field of motors, in particular to a hub motor.

Background

The width of a garden tool such as a mower, a snowplow, etc. is required to be designed within a certain range so as to be able to pass through a narrow space such as a gate. Therefore, the motor is generally mounted on a hub of a mower, a snowplow or the like, and the wheel is driven to rotate, so that the motor is also called an in-wheel motor.

Generally, an encoder is installed on the hub motor to control a rotation angle of the hub motor, thereby controlling a rotation angle of the wheel. Meanwhile, an electromagnetic braking mechanism with manual release can be installed on the hub motor, and when the motor is not electrified and the electromagnetic braking mechanism locks an output shaft of the motor, the electromagnetic braking mechanism can be manually released to release the locking condition of the output shaft of the motor, so that the wheel is rotated. In the related art, an encoder and an electromagnetic braking mechanism with manual release are arranged on an end cover at the bottom of a hub motor and exposed outside, so that the encoder is convenient to maintain or the electromagnetic braking mechanism is manually released.

With respect to the related art described above, the inventor considered that since the garden tool is to pass through a narrow space such as a fence, and the in-wheel motor is mounted on the hub for driving the garden tool to operate, mounting the encoder and the electromagnetic brake mechanism with manual release outside the end cap at the bottom of the in-wheel motor increases the size of the in-wheel motor, and thus increases the size of the garden tool.

Disclosure of Invention

In order to reduce the size of a motor after an encoder is installed and an electromagnetic brake mechanism is manually released, the application provides a hub motor.

The application provides a wheel hub motor adopts following technical scheme:

the utility model provides an in-wheel motor, includes motor body, electromagnetism and embraces the subassembly and encoder subassembly of stopping, motor body is including having the motor housing who holds the chamber, electromagnetism embraces the subassembly of stopping with the encoder subassembly all is located hold the accent department of chamber and install in hold the intracavity, electromagnetism embraces the subassembly of stopping including having the brake body of installation chamber, electric brake body lid is located hold the accent department of chamber, the encoder subassembly install in the chamber.

Through adopting above-mentioned technical scheme, with electromagnetism brake subassembly and encoder subassembly integration together, install the encoder subassembly in the installation intracavity simultaneously and reduced the area of occupation after two sets of subassemblies integration. And then the integrated electromagnetic brake assembly and the encoder assembly are arranged in the accommodating cavity of the motor housing, so that the size of the motor body is shortened, the motor body after the encoder assembly and the electromagnetic brake assembly are arranged is flat, and the space occupation rate of the motor body is further reduced.

Optionally, the encoder subassembly includes the encoder body, is used for shielding external signal's shielding shell and encoder end cover, the mounting groove has been seted up to shielding shell one side, the encoder body install in the mounting groove, the encoder end cover lid is located the notch department of mounting groove, the shielding shell inserts hold the intracavity.

Through adopting above-mentioned technical scheme, the encoder body is installed in the mounting groove, and shielding shell can reduce the influence that the signal of telecommunication of electromagnetism brake assembly produced the encoder body, makes the encoder body can be according to normal coding operation. The encoder end cover shields the notch of the mounting groove, and then the risk that external dust or water drops enter the mounting groove to influence the encoder body is reduced.

Optionally, the mounting groove includes the first mounting groove that supplies the encoder end cover to install and supplies the second mounting groove of encoder body installation, the second mounting groove set up in the tank bottom of first mounting groove, just the groove diameter of first mounting groove is greater than the groove diameter of second mounting groove.

Through adopting above-mentioned technical scheme, first mounting groove and second mounting groove Cheng Jie ladder groove, install the encoder end cover in first mounting groove, reduced the space occupation rate after the encoder end cover is installed, and then reduced the space occupation rate on the motor body after the encoder subassembly is installed.

Optionally, the electromagnetic braking assembly further comprises a brake pad sleeved on the motor shaft and synchronously rotating with the motor shaft, a first clamping plate is arranged in the accommodating cavity, and the brake pad is located between the first clamping plate and the brake body.

Through adopting above-mentioned technical scheme, after the motor body outage, first clamping plate and the tight brake block of brake body clamp, make the brake block be difficult for rotating, and then make the motor shaft be difficult for rotating realize the brake function.

Optionally, the electromagnetism is embraced and is stopped subassembly still includes release board, release nut and screw thread install in release bolt on the release nut, the release board set up in the brake body deviate from one side of first clamping plate, release nut fixed mounting in on the release board.

By adopting the technical scheme, the first clamping plate and the brake body only release the brake pad under the condition that the motor is electrified, so that the wheel is driven to rotate. If the circuit of the motor is short-circuited, the motor cannot be electrified, at the moment, the release bolt can be arranged on the release nut in a threaded mode, and then the release plate is pulled to move to one side far away from the brake pad, so that the brake pad is not clamped, and the wheel is rotated.

Optionally, a second clamping plate is disposed on a side of the brake body, which is close to the first clamping plate, and the brake pad is located between the first clamping plate and the second clamping plate.

By adopting the technical scheme, when the brake is braked, the brake pad will rub with the second clamping plate, so that the second clamping plate is worn, and the cost for replacing the second clamping plate by replacing the brake body during replacement is lower.

Optionally, the electromagnetic brake assembly further includes a tension spring that makes the second clamping plate always have a movement tendency toward the first clamping plate.

Through adopting above-mentioned technical scheme, when not powering on, the second presss from both sides tight board cooperation under the effect of spring that rises and presss from both sides tight spacing to the brake block in first clamp.

Optionally, the release plate pass through the bolt install in on the second grip block, the screw thread end of bolt pass the brake body screw thread install in on the second grip block, the second grip block with the interval has the regulation clearance between the brake body, and the bolt with brake body clearance fit.

Through adopting above-mentioned technical scheme, when manual brake, pulling release bolt makes the release board remove, because bolt and brake body clearance fit, and then drive the second grip block and remove to adjusting in the clearance, make the brake block can rotate.

Optionally, the encoder assembly further comprises a mounting base ring, the mounting base ring is mounted at the bottom of the mounting groove, and the encoder body is mounted on the mounting base ring.

By adopting the technical scheme, the encoder body is generally manufactured by welding a plurality of electronic components on a PCB. Therefore, the mounting bottom ring can enable a certain distance to be reserved between the encoder body and the bottom of the mounting groove so as to give way to the electronic components, and meanwhile, the electronic components can be positioned in the ring of the mounting bottom ring.

Optionally, a positioning column is arranged on the mounting bottom ring, and a positioning hole matched with the positioning column is formed in the encoder body.

Through adopting above-mentioned technical scheme, when installing the encoder body, insert the locating column in the locating hole and advance the position to the encoder, and then be convenient for later stage to encoder body fixed mounting on the installation base ring.

In summary, the present application includes at least one of the following beneficial technical effects:

the electromagnetic brake assembly and the encoder assembly are integrated together, and meanwhile, the encoder assembly is arranged in the mounting cavity, so that the occupied area of the two groups of assemblies after integration is reduced. The integrated electromagnetic brake assembly and the encoder assembly are arranged in the accommodating cavity of the motor shell, so that the size of the motor body is shortened, the motor body after the encoder assembly and the electromagnetic brake assembly are arranged is flat, and the space occupation rate of the motor body is further reduced;

the encoder body is arranged in the mounting groove, and the shielding shell can reduce the influence of the electric signal of the electromagnetic brake assembly on the encoder body, so that the encoder body can operate according to normal encoding;

the first clamping plate and the brake body only release the brake pad under the condition that the motor is electrified, so that the wheels are driven to rotate. If the circuit of the motor is short-circuited, the motor cannot be electrified, at the moment, the release bolt can be arranged on the release nut in a threaded mode, and then the release plate is pulled to move to one side far away from the brake pad, so that the brake pad cannot be clamped to the motor shaft to rotate, and the wheels rotate.

Drawings

Fig. 1 is a schematic structural view of an in-wheel motor in an embodiment of the present application.

Fig. 2 is a perspective cross-sectional view of an in-wheel motor in an embodiment of the present application.

Fig. 3 is a perspective cross-sectional view of an electromagnetic brake assembly and encoder assembly in an embodiment of the present application.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an exploded view of an encoder assembly in an embodiment of the present application.

Reference numerals illustrate: 1. a motor body; 11. a motor housing; 111. a receiving chamber; 112. a mounting chamber; 12. a motor rear cover; 13. a stator; 14. a rotor; 15. a motor shaft; 2. an electromagnetic brake assembly; 21. a brake body; 211. a second through hole; 212. sealing sleeve; 213. a spring hole; 214. a limit plug; 215. a mounting cavity; 22. a brake pad; 23. a first clamping plate; 24. a second clamping plate; 241. a threaded hole; 242. a spring groove; 25. a spring is expanded; 26. a release plate; 261. a first through hole; 27. releasing the nut; 28. releasing the bolt; 3. an encoder assembly; 31. an encoder body; 311. positioning holes; 32. a shielding housing; 321. a mounting groove; 3211. a first mounting groove; 3212. a second mounting groove; 33. installing a bottom ring; 331. positioning columns; 34. an encoder end cap.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a hub motor.

Referring to fig. 1, the in-wheel motor includes a motor body 1, an electromagnetic brake assembly 2, and an encoder assembly 3. The encoder assembly 3 and the electromagnetic brake assembly 2 are integrated together and are arranged in the motor body 1, so that the motor body 1 is small in flat size after the electromagnetic brake assembly 2 and the encoder assembly 3 are arranged.

Referring to fig. 1 and 2, the motor body 1 includes a motor housing 11, a motor rear cover 12, a stator 13, a rotor 14, and a motor shaft 15. One side of the motor housing 11 is provided with a containing cavity 111, and the bottom of the containing cavity 111 is provided with a mounting cavity 112 for mounting the stator 13, the rotor 14 and the motor shaft 15. The size of the cavity opening of the mounting cavity 112 is larger than that of the cavity of the accommodating cavity 111, so that the accommodating cavity 111 and the mounting cavity 112 form a stepped groove. The motor rear cover 12 is mounted on the bottom of the housing chamber 111 by bolts to cover the mouth of the mounting chamber 112. One end of the motor shaft 15, which is close to the accommodating cavity 111, passes through the motor rear cover 12 and is positioned in the accommodating cavity 111, the electromagnetic braking assembly 2 and the encoder assembly 3 are both positioned in the accommodating cavity 111, and the electromagnetic braking assembly 2 and the motor shaft 15 are matched to lock or unlock the rotation of the motor shaft 15.

The electromagnetic brake assembly 2 comprises a brake body 21, a brake pad 22, a first clamping plate 23, a second clamping plate 24, a tension spring 25, a release plate 26, a release nut 27 and a release bolt 28. The first clamping plate 23 is fixed to a side of the motor rear cover 12 near the accommodation chamber 111 by bolts. The second clamping plate 24 is floatingly mounted on a side of the brake body 21 adjacent to the brake pad 22 and is connected to the release plate 26 by bolts. The brake pad 22 is connected to the motor shaft 15 and rotates in synchronization with the motor shaft 15, and the brake pad 22 is located between the first clamping plate 23 and the second clamping plate 24. When the motor body 1 is powered off, the second clamping plate 24 and the first clamping plate 23 clamp and limit the brake pad 22 under the action of the expanding spring 25; when the motor body 1 is electrified, the second clamping plate 24 is in clearance fit with the brake pad 22 under the action of the brake body 21. The release plate 26 is located on the side of the brake body 21 facing away from the brake pad 22, the release nut 27 is welded to the side of the release plate 26 facing away from the brake body 21, and the release bolt 28 is threadedly mounted on the release nut 27. When the motor body 1 is damaged and is not electrified, the brake body 21 can be moved by pulling the release bolt 28, so that the second clamping plate 24 is in clearance fit with the brake pad 22.

Wherein, the brake body 21 is similar to an electromagnet, the second clamping plate 24 is similar to an armature, and the brake body 21 has magnetic attraction to the second clamping plate 24 after the motor is electrified; when the motor is powered off, the brake body 21 is not magnetic, and the second clamping plate abuts against the brake pad 22 to limit the brake pad under the action of the expansion spring 25.

Referring to fig. 2 and 3, the brake body 21 is disposed at the cavity opening of the accommodating cavity 111 and is fixed to the motor rear cover 12 by bolts. The part of the motor shaft 15 located in the accommodating cavity 111 is connected with a transmission gear in a key way, a spline groove matched with the transmission gear is formed in the brake pad 22, and the transmission gear is inserted into the spline groove, so that the brake pad 22 and the motor shaft 15 rotate synchronously.

Referring to fig. 3 and 4, a first through hole 261 is formed in a side of the release plate 26 facing away from the brake body 21, and the first through hole 261 penetrates the release plate 26. The brake body 21 is provided with a second through hole 211 concentric with the first through hole 261, and the second through hole penetrates through the brake body 21. The second clamping plate 24 is provided with a screw hole 241 concentric with the second through hole 211. The threaded ends of the bolts pass through the first through holes 261 and the second through holes 211 to be screwed in the threaded holes 241, and the bolts are in clearance fit with the first through holes 261 and the second through holes 211. An adjustment gap is formed between the second clamping plate 24 and the brake body 21, and pulling the release bolt 28 moves the second clamping plate 24 into the adjustment gap without abutting the brake pad 22. The screw thread is arranged on the outer wall of one side of the bolt, which is away from the bolt head, and the rest part is a smooth cylinder. And the sealing sleeve 212 is inserted into the second through hole 211, and the bolt side is penetrated into the sealing sleeve 212, so that water is not easy to permeate into the motor through the second through hole.

Referring to fig. 2 and 4, a spring hole 213 is formed at a side of the brake body 21 where the second through hole 211 is formed, and the spring hole 213 penetrates the brake body 21. The second clamping plate 24 is provided with a spring groove 242 concentric with the spring hole 213 at one side thereof adjacent to the brake body 21. One side of the spring hole 213, which is away from the second clamping plate 24, is inserted with a limiting plug 214 in an interference manner, one end of the expanding spring 25 is inserted into the spring groove 242 to be abutted against the bottom of the spring groove 242, and the other end is inserted into the spring hole 213 to be abutted against the limiting plug 214.

Referring to fig. 3 and 5, a mounting cavity 215 is formed on a side of the brake body 21 facing away from the bottom of the accommodating cavity 111, and the encoder assembly 3 is mounted in the mounting cavity 215 and does not protrude from the mounting cavity 215. The encoder assembly 3 includes an encoder body 31, a shield housing 32, a mounting base ring 33, and an encoder end cap 34. A mounting groove 321 is provided on a side of the shield case 32 facing away from the second clamping plate 24, the encoder body 31 is mounted on the mounting bottom ring 33 by bolts, and the mounting bottom ring 33 is fixed to a groove bottom of the mounting groove 321 by bolts. The encoder end cover 34 covers the notch of the mounting groove 321 and is mounted on the brake body 21 through bolts, so as to seal the notch of the mounting groove 321.

The shield shell 32 is inserted into the mounting cavity 215 and is fixed to the brake body 21 by bolts. The shielding case 32 is preferably made of an aluminum material in this embodiment, so that the influence of external electric signals on the encoder body 31 can be reduced. The mounting groove 321 includes a first mounting groove 3211 and a second mounting groove 3212, and the second mounting groove 3212 is formed at a bottom of the first mounting groove 3211. Taking the example that the first mounting groove 3211 and the second mounting groove 3212 are circular grooves, the diameter of the first mounting groove 3211 is larger than the diameter of the second mounting groove 3212, that is, the first mounting groove 3211 and the second mounting groove 3212 are one stepped groove. The encoder end cover 34 is mounted to the groove bottom of the first mounting groove 3211 by bolts to seal the notch of the second mounting groove 3212. The encoder body 31 and the mounting base ring 33 are mounted in the second mounting groove 3212.

Referring to fig. 5, a plurality of positioning posts 331 are integrally formed on a side of the mounting bottom ring 33 adjacent to the encoder body 31, and a plurality of positioning holes 311 are formed on the encoder body 31 and matched with the positioning posts 331. The number of the positioning holes 311 is consistent with and corresponds to the number of the positioning posts 331 one by one. The positioning column 331 is inserted into the positioning hole 311 to position the encoder body 31, so that the encoder body 31 is conveniently mounted on the mounting bottom ring 33 through bolts. The mounting bottom ring 33 is fixed to the bottom of the second mounting groove 3212 by bolts.

The implementation principle of the hub motor is as follows: the encoder assembly 3 and the electromagnetic brake assembly 2 are integrated. The encoder subassembly 3 is installed in the installation cavity 215 on the brake body 21, and the brake body 21 is installed again in holding the intracavity 111 on motor housing 11, compares and carries out superimposed structure between motor body 1, electromagnetism with the encoder subassembly 3 three with the motor body 1, electromagnetism is embraced and is stopped subassembly 2 and encoder subassembly 3, can be the platykurtic behind this application's structure messenger motor body 1 installation electromagnetism is embraced and is stopped subassembly 2 and encoder subassembly 3, and then has reduced motor body 1's space occupation ratio.

In addition, when the circuit in the motor body 1 is short-circuited and cannot rotate, the release bolt 28 can be pulled to drive the release plate 26 to move in a direction away from the brake body 21. Movement of the release plate 26 will drive the second clamping plate 24 to move in a direction approaching the brake body 21, so that the brake pad 22 is released to rotate, and the motor shaft 15 can rotate.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A wheel hub motor, characterized in that: including motor body (1), electromagnetism are embraced and are stopped subassembly (2) and encoder subassembly (3), motor body (1) is including having motor housing (11) that hold chamber (111), electromagnetism are embraced and are stopped subassembly (2) and encoder subassembly (3) all are located hold chamber (111) accent department and install in hold chamber (111), electromagnetism is embraced and is stopped subassembly (2) including having brake body (21) of installing chamber (215), brake body (21) lid is located hold chamber (111) accent department, encoder subassembly (3) install in chamber (215).

2. The in-wheel motor according to claim 1, wherein: the encoder assembly (3) comprises an encoder body (31), a shielding shell (32) for shielding external signals and an encoder end cover (34), wherein a mounting groove (321) is formed in one side of the shielding shell (32), the encoder body (31) is mounted in the mounting groove (321), the encoder end cover (34) is covered at the notch of the mounting groove (321), and the shielding shell (32) is inserted into the accommodating cavity (111).

3. A hub motor according to claim 2, wherein: the mounting groove (321) comprises a first mounting groove (3211) for mounting the encoder end cover (34) and a second mounting groove (3212) for mounting the encoder body (31), the second mounting groove (3212) is formed in the groove bottom of the first mounting groove (3211), and the groove diameter of the first mounting groove (3211) is larger than that of the second mounting groove (3212).

4. The in-wheel motor according to claim 1, wherein: the electromagnetic braking assembly (2) further comprises a brake pad (22) which is sleeved on the motor shaft (15) and rotates synchronously with the motor shaft (15), a first clamping plate (23) is arranged in the accommodating cavity (111), and the brake pad (22) is located between the first clamping plate (23) and the brake body (21).

5. The in-wheel motor of claim 4, wherein: the electromagnetic brake assembly (2) further comprises a release plate (26), a release nut (27) and a release bolt (28) which is arranged on the release nut (27) in a threaded mode, the release plate (26) is arranged on one side, deviating from the first clamping plate (23), of the brake body (21) and used for loosening the brake pad (22), and the release nut (27) is fixedly arranged on the release plate (26).

6. The in-wheel motor according to claim 5, wherein: a second clamping plate (24) is arranged on one side, close to the first clamping plate (23), of the brake body (21), and the brake pad (22) is located between the first clamping plate (23) and the second clamping plate (24).

7. The in-wheel motor of claim 6, wherein: the electromagnetic brake assembly (2) further comprises a tension spring (25) which enables the second clamping plate (24) to always have a movement trend towards the first clamping plate (23).

8. The in-wheel motor of claim 6, wherein: the release plate (26) is installed on the second clamping plate (24) through a bolt, the threaded end of the bolt penetrates through the brake body (21) to be installed on the second clamping plate (24) in a threaded mode, an adjusting gap is arranged between the second clamping plate (24) and the brake body (21) at intervals, and the bolt is in clearance fit with the brake body (21).

9. A hub motor according to claim 2, wherein: the encoder assembly (3) further comprises a mounting bottom ring (33), the mounting bottom ring (33) is mounted at the bottom of the mounting groove (321), and the encoder body (31) is mounted on the mounting bottom ring (33).

10. The in-wheel motor of claim 9, wherein: the mounting bottom ring (33) is provided with a positioning column (331), and the encoder body (31) is provided with a positioning hole (311) matched with the positioning column (331).