CN112290729A

CN112290729A - Rotor positioning mechanism and centrally-mounted motor using same

Info

Publication number: CN112290729A
Application number: CN202011121164.1A
Authority: CN
Inventors: 王加许; 王健; 唐敏; 丁伟
Original assignee: Jinyuxing Electromechanical Technology Zhejiang Co ltd
Current assignee: Jinyuxing Electromechanical Technology Zhejiang Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-29

Abstract

The invention relates to a rotor positioning mechanism and a middle-placed motor using the same, and the rotor positioning mechanism comprises a rotor, wherein a motor shaft hole is formed in the rotor, a motor shaft penetrates through the motor shaft hole, a threaded column is formed in the motor shaft, a locking nut is installed on the threaded column, a positioning ring is further sleeved on the motor shaft and is positioned between the locking nut and the rotor, a key groove is formed in the side surface of the motor shaft, a plurality of positioning grooves are formed in the locking nut, a plurality of protruding first clamping blocks and a plurality of protruding second clamping blocks are axially formed in the positioning ring, the first clamping blocks are positioned in the key groove, and the second clamping blocks are positioned in the positioning grooves. Compared with the prior art, the locking nut is fixed on the motor shaft in a threaded manner, the motor shaft is also sleeved with the positioning ring with a novel structure, the positioning ring is matched with the locking nut and the motor shaft to prevent the locking nut and the motor shaft from rotating relatively, the motor runs more stably, the dynamic balance effect is good, and the drift is small.

Description

Rotor positioning mechanism and centrally-mounted motor using same

Technical Field

The invention relates to a rotor positioning mechanism and a middle-mounted motor using the same, and belongs to the technical field of electric vehicles.

Background

The motor of electric motor car includes rotor, stator and motor shaft, and the rotor is passed to the motor shaft, and the rotor drives the easy axial displacement on the motor shaft of in-process of motor shaft motion, leads to the unable normal operating of motor. The motor installation of the existing electric vehicle mainly comprises a middle motor, a wheel hub, a side suspension and other modes, wherein the middle motor is installed on a vehicle frame, and a chain drives a rear wheel to rotate so as to realize power transmission.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rotor positioning mechanism for preventing a rotor from axially moving on a motor shaft and a middle-mounted motor using the same.

The technical scheme adopted by the invention for realizing the purpose is as follows:

the utility model provides a rotor positioning mechanism, includes the rotor, the motor shaft hole has been seted up on the rotor, wear to be equipped with the motor shaft in the motor shaft hole, the system has the screw thread post on the motor shaft, install lock nut on the screw thread post, still the cover is equipped with the position circle on the motor shaft, the position circle is located lock nut with between the rotor, the side system of motor shaft has the keyway, the last system of lock nut has a plurality of constant head tanks, the axial system has a plurality of convex first fixture blocks and second fixture block on the position circle, first fixture block is located in the keyway, the second fixture block is located in the constant head tank.

As a further optimization of the above technical solution: a plurality of protruding positioning baffles are radially arranged on the positioning ring, and the second clamping block is formed by bending the positioning baffles.

As a further optimization of the above technical solution: rotor baffles are further arranged on two sides of the rotor, and the positioning ring is tightly attached to one of the rotor baffles.

As a further optimization of the above technical solution: the first fixture block and the second fixture block are arranged oppositely.

As a further optimization of the above technical solution: the locating ring is annular, the second fixture block is located the outer lane of locating ring, first fixture block is located the inner circle of locating ring.

As a further optimization of the above technical solution: and a shaft key matched with the key groove is arranged on the hole wall of the motor shaft hole.

The utility model provides an in use as above-mentioned rotor positioning mechanism put motor, establishes including the cover stator outside the rotor, a plurality of magnetic steel hole, louvre have been seted up on the rotor, the louvre encircles the motor shaft hole is arranged, per two the magnetic steel hole forms a set ofly and is the V style of calligraphy and encircles the louvre is arranged, and is adjacent two sets of be provided with N utmost point magnet steel and S utmost point magnetic steel in the magnetic steel hole respectively, the outer lane of rotor still system has a plurality of rotor lug.

As a further optimization of the above technical solution: the motor shaft is provided with an encoder magnet, a first bearing, a second bearing, a first oil seal and a third bearing, a first limiting ring is manufactured on the motor shaft, and the second bearing is tightly attached to the first limiting ring.

As a further optimization of the above technical solution: the motor shaft is provided with an input gear, the input gear is meshed with an output gear, an output shaft penetrates through the center of the output gear, two ends of the output shaft penetrate through the output gear, the output shaft is provided with a second limiting ring, the output gear is tightly attached to the second limiting ring, a fourth bearing, a shaft sleeve, a fifth bearing and a second oil seal are arranged on the output shaft, a plurality of positioning keys are arranged at the end part, far away from the second limiting ring, of the output shaft, the output shaft is further sleeved with a chain wheel, and a second key groove matched with the positioning keys is arranged on the chain wheel.

Compared with the prior art, the locking nut is fixed on the motor shaft in a threaded manner, the motor shaft is also sleeved with the positioning ring with a novel structure, the positioning ring is matched with the locking nut and the motor shaft to prevent the locking nut and the motor shaft from rotating relatively, the positioning ring is tightly attached to the rotor baffle on the side face of the rotor, the fixing effect of the rotor part is good, the operation of the centrally-mounted motor using the locking nut and the positioning ring is more stable, the dynamic balance effect is better, and the drift is smaller.

Drawings

Fig. 1 is a schematic diagram of an explosive structure of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic view of the structure of the rotor and the stator in the present invention.

Fig. 4 is a perspective view illustrating a motor shaft according to the present invention.

Fig. 5 is a schematic perspective view of a lock nut and a cage according to the present invention.

Fig. 6 is a schematic perspective view of an output shaft according to the present invention.

Fig. 7 is a perspective view of the front end cap of the present invention.

Fig. 8 is a perspective view of the gear cover of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description. As shown in fig. 1-8, the centrally-mounted motor includes a rotor 7 and a stator 2 sleeved on the rotor 7, the rotor 7 is provided with a plurality of magnetic steel holes 71, heat dissipation holes 72 and a motor shaft hole 73, a motor shaft 3 penetrates through the motor shaft hole 73, and a shaft key 74 matched with the motor shaft 3 is formed on a hole wall of the motor shaft hole 73. The heat dissipation holes 72 are arranged around the motor shaft hole 73, and every two magnetic steel holes 71 form a group which is arranged around the heat dissipation holes 72 in a V shape. N pole magnetic steel 76 and S pole magnetic steel 77 are respectively arranged in the two adjacent groups of magnetic steel holes 71. The outer ring of the rotor 7 is also provided with a plurality of rotor projections 75, and the rotor projections 75 play a role of magnetic conduction.

In the above technical scheme: the motor shaft 3 is provided with a threaded column 31, the threaded column 31 penetrates through the rotor 7, the threaded column 31 is provided with a locking nut 4, the motor shaft 3 is provided with an annular positioning ring 5, and the positioning ring 5 is positioned between the locking nut 4 and the rotor 7. The side of the motor shaft 3 is formed with a first key groove 32 that is fitted with the shaft key 14. The outer ring of the locking nut 4 is provided with a plurality of positioning grooves 41. The outer ring of the positioning ring 5 is radially provided with a plurality of protruding positioning baffles 51, the inner ring of the positioning ring 5 is axially provided with a plurality of protruding first fixture blocks 52 and a plurality of protruding second fixture blocks 53, the first fixture blocks 52 and the second fixture blocks 53 can be arranged in an opposite manner, the first fixture blocks 52 are located in the first key grooves 32, and the second fixture blocks 53 are located in the positioning grooves 41. In this embodiment, the second latch 53 is formed by bending the positioning baffle 51. That is, after the locking nut 4 is screwed on the threaded column 31, a part of the positioning baffle 51 corresponds to a part of the positioning slot 41, the positioning baffle 51 corresponding to the positioning slot 41 is bent to form a second latch 53, and the second latch 53 is latched into the positioning slot 41. The positioning baffle 51 is provided with a plurality of blocks in this embodiment, so that the probability that the locking nut 4 corresponds to the positioning groove 41 after being tightened is increased. Rotor baffles 78 are further arranged on two sides of the rotor 7, and the locating ring 5 is tightly attached to one rotor baffle 78.

In the above technical scheme: the tip system of screw thread post 31 has first gear shaft 33, the cover is equipped with first bearing 6 on the first gear shaft 33, the tip of first gear shaft 33 still is provided with encoder magnet 1.

In the above technical scheme: the motor shaft 3 is provided with a first limiting ring 34, one side surface of the first limiting ring 34 is provided with a connecting column 35, one end of the connecting column 35 is provided with an input gear 36, and the end part of the motor shaft 3 close to the input gear 36 is provided with a second gear rotating shaft 37. And a second bearing and a first oil seal 8 are arranged on the connecting column 35, and the second bearing is close to the first limiting ring 34. The second gear rotating shaft 37 is provided with a third bearing 9. The motor shaft 3 and the input gear 36 are integrally formed, so that the transmission efficiency is higher, and the noise is lower.

In the above technical scheme: the input gear 36 is engaged with the output gear 10, an output shaft 11 penetrates through the center of the output gear 10, and both ends of the output shaft 11 are exposed out of the output gear 10. The output shaft 11 is provided with a second limiting ring 111, and the second limiting ring 111 limits the output gear 10. The end part of the output shaft 11 close to the second limit ring 111 is provided with a third gear rotating shaft 112, and the third gear rotating shaft 112 is provided with a fourth bearing 12. The output shaft 11 is further sleeved with a shaft sleeve, a fifth bearing 13 and a second oil seal 14, a plurality of positioning keys 113 are manufactured at the end part, far away from the second limiting ring 111, of the output shaft 11, a chain wheel 15 is further sleeved on the output shaft 11, and a second key groove matched with the positioning keys 113 is manufactured on the chain wheel 15.

In the above technical scheme: and the stator comprises a stator shell 16 with a hollow inner part, and the stator 2 and the rotor 7 are both positioned in the stator shell 16. A front end cover 17 and a rear end cover 18 are respectively installed at two ends of the stator housing 16. One side of the rear end cover 18 near the stator housing 16 is formed with a first motor shaft cavity, and the other side is formed with an encoder cavity 181. The encoder cavity 181 is in communication with the first motor shaft cavity via a rear end cap aperture 182. The encoder cavity 181 is internally provided with an encoder 19, a mounting plate 191 is arranged on one side of the encoder 19 close to the encoder cavity 181, a plurality of arc-shaped moving holes 192 are formed in the mounting plate 191, and the moving holes 192 surround the encoder 19. A plurality of threaded holes are formed in the encoder cavity 181, the rod part of a screw passes through the moving hole 192 and is fixed in the threaded hole, and the cap head of the screw is tightly attached to the mounting plate 191 so as to mount the encoder 19 in the encoder cavity 181. The moving aperture 192 allows the encoder 19 to rotate within the encoder chamber 181 without disassembly, facilitating the adjustment of the position of the encoder 19. The encoder magnet 1 passes through the rear end cap hole 182 and engages the encoder 19. And an encoder outer cover 20 is covered on the encoder cavity 181.

In the above technical scheme: the outer wall of the encoder cavity 181 is also provided with three hollow first waterproof joints 21, and the three waterproof joints are all connected with phase lines 22. The first watertight connector 21 is a prior art. And a hollow second waterproof connector 23 is further mounted on the outer wall of the encoder cavity 181, and a Hall wire 24 is connected to the second waterproof connector 23. The second watertight connector 23 is prior art.

In the above technical scheme: the front end cover 17 is close to a side surface of the stator housing 16 is provided with a second motor shaft cavity 171, the other side surface of the front end cover 17 is provided with a first gear cavity 172, and the second motor shaft cavity 171 is communicated with the first gear cavity 172 through a front end cover hole 173. The input gear 36 on the motor shaft 3 passes through the front end cover aperture 173 and is located in the first gear chamber 172, and the output gear 10 is also located in the first gear chamber 172. This technical scheme is through directly having first gear chamber and second gear chamber on front end housing 17 system, and waterproof nature is better, and the assembly is simple, simple structure, and occupation space is little.

In the above technical scheme: the first gear cavity 172 is covered with a gear outer cover 25, the gear outer cover 25 is provided with a sprocket hole 251, and the positioning key 113 passes through the sprocket hole 251 to be matched with the sprocket 15.

In the above technical scheme: the first gear chamber 172 is further formed with a first compartment 174 and a second compartment 175 on the side thereof, the second compartment 175 being adjacent to the first compartment 174, and the second compartment 175 is further formed with a third compartment 176 on the side thereof. The gear outer cover 25 is formed with a second gear chamber 251 corresponding to the first gear chamber 172. The gear cover 25 also defines a fourth compartment 252 corresponding to the first compartment 174, a fifth compartment 253 corresponding to the second compartment 175, and a sixth compartment 254 corresponding to the third compartment 176. A first air gap 177 is formed in the dividing wall between said first compartment 174 and said first gear chamber 172, a second air gap 178 is formed in the dividing wall between said second compartment 175 and said third compartment 176, a third air gap 256 is formed in the dividing wall between said fourth compartment 252 and said fifth compartment 253, and a vent hole is formed in the dividing wall between said sixth compartment 254 and said fourth compartment 252. The fourth partition chamber 252 is formed with a vent hole 255 communicating with the outside, and the vent hole 255 is provided with a vent valve 26. The vent hole 254 is separated from the first and

second gear chambers

172, 251 by the first and

fourth separating chambers

174, 252, so that oil is prevented from leaking from the vent hole 255 when the gears in the first and

second gear chambers

172, 251 rotate to drive oil to splash, and the problem of oil leakage at the vent hole 255 is solved. The first exhaust passage is routed through the first air gap 177, the first sub-compartment 174, the fourth sub-compartment 252, and the vent 255, the first air gap 177 communicating the first and

second gear chambers

172, 251 with the vent 255; the second venting path is routed through the first air gap 177, the first compartment 174, the fourth compartment 252, the venting aperture, the sixth compartment 254, the third compartment 176, the second air gap 178, the second compartment 175, the fifth compartment 253, the third air gap 256, the fourth compartment 252, and the venting aperture 255, the third air gap 256, the second air gap 178, and the venting aperture communicating the second, third, fifth, and

sixth compartments

175, 176, 253, 254 with the venting aperture. After the motor operates for a long time, a large amount of heat is generated, the temperature in the first gear cavity 172 and the temperature in the second gear cavity 251 rise, lubricating oil needs to be added between the gears when the motor operates, the lubricating oil lubricates the rotating process of the gears, but the lubricating oil splashes when the gears rotate, and the lubricating oil splashes to be fully contacted with high-temperature gas, so that high-pressure gas is generated. The high-pressure gas in the first and

second gear chambers

172 and 251 may be exhausted through the first exhaust passage or the second exhaust passage. The exhaust valve 26 ensures stable air pressure in the first and

second gear chambers

172, 251. The first exhaust passage and the second exhaust passage are communicated with each other. A single exhaust passage may allow high pressure gas to flush the exhaust valve. A second exhaust passage is provided to divert high pressure gas in the fourth compartment 252, and a portion of the high pressure gas is exhausted along the first exhaust passage through the exhaust valve 26 on the vent 255; another portion of the high pressure gas travels along the second venting path from the fourth compartment 252 through the venting holes into the sixth compartment 254, then back into the fourth compartment 252 after passing through the third compartment 176, the second air gap 178, the second compartment 175, the fifth compartment 253, and the third air gap 256, and then out through the venting valve 26 on the vent 255. The second, third, fifth and

sixth separation chambers

175, 176, 253 and 254 buffer the high pressure gas, prevent the high pressure gas from rushing to open the exhaust valve, and ensure the stable gas pressure in the first and

second gear chambers

172 and 251.

In the above technical scheme: two oil holes are formed in the outer wall of the second gear cavity 251, and an oil filling and discharging stud 27 is installed on each oil hole. The oil injection and oil drainage stud 27 is detached from the oil hole, so that oil injection or oil drainage of the second gear cavity 251 can be completed through the oil hole, and normal operation of the gear is guaranteed.

In the above technical scheme: the first bearing 6 is fixed with the inner wall of the first motor shaft cavity. The second bearing is fixed to the inner wall of the second motor shaft chamber 171. The third bearing 9 is fixed in the second gear chamber 251. The fourth bearing 12 is fixed in the first gear chamber 172.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention should fall within the scope of the present invention.

Claims

1. The rotor positioning mechanism comprises a rotor (7), a motor shaft hole (73) is formed in the rotor (7), a motor shaft (3) penetrates through the motor shaft hole (73), it is characterized in that a threaded column (31) is arranged on the motor shaft (3), a locking nut (4) is arranged on the threaded column (31), a positioning ring (5) is further sleeved on the motor shaft (3), the positioning ring (5) is positioned between the locking nut (4) and the rotor (7), a key groove (32) is formed on the side surface of the motor shaft (3), a plurality of positioning grooves (41) are formed on the locking nut (4), a plurality of first clamping blocks (52) and second clamping blocks (53) which are protruded are axially arranged on the positioning ring (5), the first fixture block (52) is located in the key groove (32), and the second fixture block (53) is located in the positioning groove (41).

2. The rotor positioning mechanism according to claim 1, wherein a plurality of protruding positioning baffles (51) are radially formed on the positioning ring (5), and the second fixture block (53) is formed by bending the positioning baffles (51).

3. The rotor positioning mechanism according to claim 1, characterized in that rotor baffles (78) are further arranged on two sides of the rotor (7), and the positioning ring (5) is tightly attached to one of the rotor baffles (78).

4. The rotor positioning mechanism according to claim 1, wherein the first block (52) and the second block (53) are disposed opposite to each other.

5. The rotor positioning mechanism according to claim 1, wherein the positioning ring (5) is annular, the second latch (53) is located at an outer ring of the positioning ring (5), and the first latch (52) is located at an inner ring of the positioning ring (5).

6. The rotor positioning mechanism according to claim 1, wherein the hole wall of the motor shaft hole (73) is formed with a shaft key (74) that fits the key groove (32).

7. The middle motor using the rotor positioning mechanism according to any one of claims 1 to 6, characterized by comprising a stator (2) sleeved outside the rotor (7), wherein the rotor (7) is provided with a plurality of magnetic steel holes (71) and heat dissipation holes (72), the heat dissipation holes (72) are arranged around the motor shaft hole (73), every two magnetic steel holes (71) form a group and are arranged around the heat dissipation holes (72) in a V shape, N-pole magnetic steel (76) and S-pole magnetic steel (77) are respectively arranged in two adjacent groups of magnetic steel holes (71), and a plurality of rotor bumps (75) are further formed in the outer ring of the rotor (7).

8. The centrally-mounted motor according to claim 7, characterized in that the motor shaft (3) is provided with an encoder magnet (1), a first bearing (6), a second bearing, a first oil seal (8) and a third bearing (9), the motor shaft (3) is provided with a first limit ring (34), and the second bearing is tightly attached to the first limit ring (34).

9. The centrally placed motor according to claim 7, characterised in that the motor shaft (3) is provided with an input gear (36), an output gear (10) is meshed on the input gear (36), an output shaft (11) penetrates through the center of the output gear (10), both ends of the output shaft (11) penetrate through the output gear (10), a second limiting ring (111) is arranged on the output shaft (11), the output gear (10) is tightly attached to the second limiting ring (111), a fourth bearing (12), a shaft sleeve, a fifth bearing (13) and a second oil seal (14) are arranged on the output shaft (11), the end part of the output shaft (11) far away from the second limit ring (111) is provided with a plurality of positioning keys (113), the output shaft (11) is further sleeved with a chain wheel (15), and a second key groove matched with the positioning key (113) is formed in the chain wheel (15).