CN219918621U - Electric driving device - Google Patents
Electric driving device Download PDFInfo
- Publication number
- CN219918621U CN219918621U CN202320604997.6U CN202320604997U CN219918621U CN 219918621 U CN219918621 U CN 219918621U CN 202320604997 U CN202320604997 U CN 202320604997U CN 219918621 U CN219918621 U CN 219918621U
- Authority
- CN
- China
- Prior art keywords
- outer ring
- bearing
- rotating shaft
- steel balls
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses an electric driving device, which comprises a shell, a rotating shaft, a stator, a permanent magnet, a screw rod nut, a first bearing and a second bearing, wherein the rotating shaft, the stator, the permanent magnet, the screw rod nut, the first bearing and the second bearing are arranged in the shell; the second bearing comprises a first outer ring, a second outer ring and a plurality of steel balls, wherein the lead screw nut penetrates through the first outer ring and the second outer ring, and raceways matched with the steel balls are respectively formed in the lead screw nut, the first outer ring and the second outer ring, so that the steel balls are positioned in the raceways and respectively contacted with the lead screw nut, the first outer ring and the second outer ring. According to the four-point contact ball bearing, the lead screw nut and the two outer rings are combined to form the four-point contact ball bearing, and the two outer rings are of a split structure, so that more steel balls can be arranged in the four-point contact ball bearing, and further, larger axial force and radial force can be borne.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to an electric driving device.
Background
The electric drive unit comprises a motor and a controller. The hollow motor is used as a power unit of electric drive, and can accommodate the shaft parts driven by the motor to do rotary motion, axial motion and the like in the hollow motor. In the prior art, a hollow motor is used as a power unit to provide rotating torque, but cannot bear large axial load, but the rotor of the motor is combined with other parts except the motor to provide axial support so as to bear the large axial load, so that the motor cannot be independently manufactured, packaged and transported, and has complex process and high manufacturing cost.
Disclosure of Invention
In view of the above-mentioned shortcomings, the present utility model provides an electric drive device.
In order to achieve the above object, the present utility model provides an electric driving device, including a housing, a rotating shaft, a stator, a permanent magnet, a screw nut, a first bearing and a second bearing, wherein the rotating shaft is hollow in the housing, one end of the rotating shaft is connected with one end of the screw nut in a matching way, the other end of the screw nut passes through the first bearing, the screw is positioned in the rotating shaft and is connected with the screw nut in a matching way through the rotating shaft, the stator is arranged at an outer side of the rotating shaft at intervals, and the permanent magnet is used for driving the rotating shaft to move and is arranged between the rotating shaft and the stator;
the second bearing comprises a first outer ring, a second outer ring and a plurality of steel balls, the lead screw nut penetrates through the first outer ring and the second outer ring, and rollaway nest matched with the steel balls is respectively formed on the lead screw nut, the first outer ring and the second outer ring, so that the steel balls are located in the rollaway nest and are respectively contacted with the lead screw nut, the first outer ring and the second outer ring.
Preferably, the second bearing further comprises a spacer provided between the first outer race and the second outer race.
Preferably, a retainer is arranged in the second bearing and is used for preventing friction between adjacent steel balls.
Preferably, the first bearing is a deep groove ball bearing.
Preferably, a retaining ring and a wave spring are arranged on the rotating shaft, one end of the wave spring is in contact with the retaining ring, and the other end of the wave spring is in contact with the deep groove ball bearing.
Preferably, an oil seal is provided between the second bearing and the stator.
Preferably, a circuit board is arranged on the shell, and a two-way control circuit is arranged on the circuit board.
Compared with the prior art, the utility model has the beneficial effects that:
according to the four-point contact ball bearing, the lead screw nut and the two outer rings are combined to form the four-point contact ball bearing, and the two outer rings are of a split structure, so that more steel balls can be arranged in the four-point contact ball bearing, and further, larger axial force and radial force can be borne.
Drawings
FIG. 1 is a block diagram of an electric drive apparatus of the present utility model;
FIG. 2 is a block diagram of the screw nut in cooperation with the spindle in the electric drive of the present utility model;
FIG. 3 is a block diagram of the screw nut engaged with a second bearing in the electric drive of the present utility model;
FIG. 4 is a block diagram of a relay assembly of the electric drive of the present utility model;
FIG. 5 is a view showing a construction of a housing in the electric driving apparatus of the present utility model;
FIG. 6 is a block diagram of an end cap assembly in an electric drive apparatus of the present utility model;
FIG. 7 is a block diagram of a target plate and tolerance ring assembly in an electric drive apparatus of the present utility model;
FIG. 8 is a block diagram of a controller cover assembly in an electric drive apparatus of the present utility model;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model is described in further detail below with reference to fig. 1:
referring to fig. 1, the present utility model provides an electric driving device, which comprises a housing 1, a rotating shaft 4, a stator 2, a permanent magnet 3, a screw rod 30, a screw rod nut 12, a first bearing 34 and a second bearing 43 which are arranged in the housing 1, wherein the rotating shaft 4 is hollow, one end of the rotating shaft is connected with one end of the screw rod nut 12 in a matching way, the other end of the screw rod nut 12 passes through the first bearing 34, the other end of the screw rod nut 12 passes through the second bearing 43, the screw rod 30 is positioned in the rotating shaft 4 and is connected with the screw rod nut 12 in a matching way through the rotating shaft 4, the stator 2 is arranged outside the rotating shaft 4 at intervals, and the permanent magnet 3 is used for driving the rotating shaft 4 to move and is arranged between the rotating shaft 4 and the stator 2;
the second bearing 43 includes a first outer ring 7, a second outer ring 9 and a plurality of steel balls 14, the lead screw nut 12 passes through the first outer ring 7 and the second outer ring 9, and raceways matched with the steel balls 14 are respectively formed on the lead screw nut 12, the first outer ring 7 and the second outer ring 9, so that the steel balls 14 are positioned in the raceways and respectively contact with the lead screw nut 12, the first outer ring 7 and the second outer ring 9.
Referring to fig. 2, the screw nut 12 is connected with the rotating shaft 4 through interference fit, an annular steel ball raceway 38 is formed on the outer circle of the screw nut 12, a thread 40 is formed in an inner hole of the screw nut, and the thread 40 in the screw nut 12 is matched with the screw 30 to form a nut screw transmission pair 13.
Referring to fig. 3, the first outer ring 7 and the second outer ring 9 have a cross section with steel ball raceways 41 and 42, respectively, of quarter circumference. The annular steel ball rolling way 38 of the screw nut 12, the steel ball rolling way 41 of the outer ring, the steel ball rolling way 42 of the outer ring and the steel ball 14 form a second bearing 43, and a lock nut 10 is arranged on the outer side of the second bearing 43 and used for fixing the second outer ring 9; an adjusting washer 8 is provided between the first outer ring 7 and the second outer ring 9 for adjusting the bearing play of the second bearing 43. When the thickness of the adjustment washer 8 increases, the distance between the first outer ring 7 and the second outer ring 9 increases, and the play of the second bearing 43 increases; conversely, when the thickness of the adjustment washer 8 is reduced, the distance between the first outer race 7 and the second outer race 9 is reduced, and the play of the second bearing 43 is reduced. When the motor rotates, the spindle 4 and the spindle nut 12 rotate synchronously due to the interference connection 39. At this time, the screw nut 12 converts the rotation motion of the rotating shaft 4 into the axial motion of the screw 30 through the internal thread screw transmission pair, and the axial force on the screw 30 acts on the shell 1 through the second bearing 43 composed of the screw nut 12, the steel ball 14, the retainer 6, the first outer ring 7, the second outer ring 9 and the adjusting gasket 8, and the shell 1 is fixed on the mounting carrier 11 through bolts, so that the axial force on the screw 30 is transmitted to the mounting carrier 11, the axial force on the motor rotor and the stator 2 is reduced, and the axial bearing capacity of the motor is improved.
Specifically, the rotating shaft 4 is pressed into the screw nut 12 to form an interference connection 39, the span rod distance A of the raceway 38 on the outer circle of the screw nut 12 is measured, and the span rod distance A of the raceway 38 of the outer circle annular steel ball 14 of the standard screw nut 12a is set as 0 The span a of the raceway 38 of the lead screw nut 12 is then compared with the span a of the standard lead screw nut 12a 0 Difference Δa=a 0 -A。
Referring to fig. 4, a step 44 and a step 45 are provided on the rotating shaft 4, the step 45 is used for positioning when the rotating shaft 4 and the screw nut 12 are assembled, the step 44 limits the axial movement of the retainer ring 36, and the wave spring 35 is arranged between the retainer ring 36 and the deep groove ball bearing 34, so as to eliminate the gap between the deep groove ball bearing 34 and the outer ring bearing 43, buffer when the rotating direction of the motor is reversed, and eliminate noise.
Specifically, the permanent magnet 3 is assembled to the housing 1, the retainer ring 36 is assembled to the rotary shaft 4, the wave spring 35 is assembled to the rotary shaft 4 to form a rotary shaft assembly 46, and then the stator 2 is assembled into the housing 1; then, the deep groove ball bearing 34 is arranged in the end cover 33 to form an end cover assembly 51; the end cover assembly 51 is arranged in the shell 1, the oil seal 5 is arranged in the shell 1, and the first outer ring 7 is arranged in the shell 1; measuring the distance B between the first outer ring 7 and the second outer ring 9, adjusting the thickness s=b- Δa of the spacer 8; the rotor assembly is placed into an inner hole of the shell 1, then the retainer 6, the steel balls 14, the adjusting gasket 8 and the second outer ring 9 are placed into the shell 1 in sequence, then the lock nut 10 is installed into the shell 1, and torque is applied to tighten.
Referring to fig. 5, screw holes 47 and 48 are provided at both end surfaces of the housing 1, respectively, and the device is fixed by bolts.
In this embodiment, the housing 1 is further provided with a circuit board 18, a controller connector bolt 19, a controller connector 20, a motor power connector 16, a motor power connector 17, a motor position signal connector 21, a controller cover 22, a motor position signal connector 23, a motor position signal connector 26, a sensor target plate 28, a tolerance ring 29, a motor position sensor circuit board 31, a motor position sensor base 32, an end cap 33, a deep groove ball bearing 34, a laminated wave spring 35, a retainer ring 36, and a sensor mounting bolt.
Specifically, the shell 1 is provided with a motor position signal connector hole 49, one end of the motor position sensor connector 25 is inserted into the pin 27 of the motor position sensor base 32, and the other end of the motor position sensor connector is inserted into the motor position signal connector 23, so that the installation is simple and convenient. The shell 1 is provided with the motor power connector hole 50, one end of the motor power connector 16 is welded with the motor bus plate, the other end of the motor power connector 16 is spliced with the motor power connector 17, the other end of the motor power connector 17 is connected with the circuit board 18, no extra power line exists between the motor and the circuit board 18, the current loss is reduced, the wires and the connectors at the other end of the wires are reduced, and the cost is reduced. The motor confluence plate is provided with 2 groups of motor binding posts 15, and each group of binding posts is respectively connected with the wire group of the stator 2 to form a group of motor windings capable of independently working. The motor is provided with 2 motor windings which can work independently, when one group fails, the other group can work continuously to provide assistance, so that the motor in the electric drive unit has a safety redundancy function.
Specifically, the tolerance ring 29 is installed into the sensor target plate 28 to form a target plate and tolerance ring assembly 52, the motor position sensor mount 32 and the motor position sensor PCBA are welded, and the motor position sensor mount 32 is assembled to the end cap 33 with bolts 37; assembling the sensor target plate and tolerance ring assembly 52 to the spindle 4, and soldering the motor position signal connector 23 and the motor power connector 17 to the circuit board 18; the controller connector 20 is assembled on the controller cover 22 and fixed by bolts 19; the mounting circuit board 18 is fitted to the controller cover 22 and fixed with bolts 21; then, the pins of the controller connector 20 are welded with the circuit board 18 to form a controller cover assembly 53, and the pins 24 and 25 of the motor position sensor connector 26 are plugged into the pins 27 of the motor position sensor; the motor power connector is welded to the motor post 15 on the motor busbar 16, and the controller cover assembly 53 is assembled to the housing 1 and fixed by bolts.
The installation steps comprise:
pressing the rotating shaft 4 into the screw nut 12 to form an interference connection 39;
the permanent magnet 3 is assembled on the rotating shaft 4, the check ring 36 is assembled on the rotating shaft 4, and the wave spring 35 is assembled on the rotating shaft 4 to form a rotating shaft assembly 46;
loading the stator 2 into the housing 1;
the deep groove ball bearing 34 is arranged in the end cover 33 to form an end cover assembly 51;
the end cover assembly 51 is installed in the shell 1, the oil seal 5 is installed in the shell 1, and the first outer ring 7 is installed in the shell 1;
the rotor assembly 42 is placed into an inner hole of the shell 1, the retainer 6, the steel ball 14, the adjusting gasket 8 and the second outer ring 9 are sequentially placed into the shell, the lock nut 10 is placed into the shell, and torque is applied to tighten the shell;
the tolerance ring 29 is installed into the sensor target plate 28 to form a target plate and tolerance ring assembly 52.
The motor position sensor base 32 and the motor position sensor PCBA are welded, and the motor position sensor base 32 is assembled on the end cover 33 by bolts 37; assembling the sensor target plate and tolerance ring assembly 52 to the rotor shaft 4;
soldering the motor position signal connector 23 and the motor power connector 17 to the circuit board 18; the controller connector 20 is assembled on the controller cover 22 and fixed by bolts 19;
the circuit board 18 is fitted to the controller cover 22 and fixed with bolts 21; then, the pins of the controller connector 20 are welded with the circuit board 18 to form a controller cover assembly 53;
pins 24, 25 of motor position sensor connector 26 are plugged onto pin 27 of motor position sensor; the motor power connector is welded with the motor terminal 15 on the motor bus plate 16, the controller cover assembly 53 is assembled on the housing 1 and is fixed by bolts, and the assembly is completed.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The electric driving device is characterized by comprising a shell, a rotating shaft, a stator, a permanent magnet, a screw rod nut, a first bearing and a second bearing, wherein the rotating shaft is arranged in the shell, one end of the rotating shaft is hollow, the rotating shaft is connected with one end of the screw rod nut in a matched manner, the other end of the screw rod nut penetrates through the first bearing, the screw rod is positioned in the rotating shaft and penetrates through the rotating shaft to be connected with the screw rod nut in a matched manner, the stator is arranged outside the rotating shaft at intervals, and the permanent magnet is used for driving the rotating shaft to move and is arranged between the rotating shaft and the stator;
the second bearing comprises a first outer ring, a second outer ring and a plurality of steel balls, the lead screw nut penetrates through the first outer ring and the second outer ring, and rollaway nest matched with the steel balls is respectively formed on the lead screw nut, the first outer ring and the second outer ring, so that the steel balls are located in the rollaway nest and are respectively contacted with the lead screw nut, the first outer ring and the second outer ring.
2. The electric drive of claim 1, wherein the second bearing further comprises a spacer disposed between the first outer race and the second outer race.
3. An electric drive according to claim 2, wherein a cage is provided in the second bearing for preventing friction between adjacent steel balls.
4. The electric drive of claim 1, wherein the first bearing is a deep groove ball bearing.
5. The electric driving device according to claim 4, wherein a retainer ring and a wave spring are arranged on the rotating shaft, one end of the wave spring is contacted with the retainer ring, and the other end is contacted with the deep groove ball bearing.
6. An electric drive according to claim 1, characterized in that an oil seal is provided between the second bearing and the stator.
7. The electric drive of claim 1, wherein a circuit board is provided on the housing, and a two-way control circuit is provided on the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320604997.6U CN219918621U (en) | 2023-03-23 | 2023-03-23 | Electric driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320604997.6U CN219918621U (en) | 2023-03-23 | 2023-03-23 | Electric driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219918621U true CN219918621U (en) | 2023-10-27 |
Family
ID=88465354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320604997.6U Active CN219918621U (en) | 2023-03-23 | 2023-03-23 | Electric driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219918621U (en) |
-
2023
- 2023-03-23 CN CN202320604997.6U patent/CN219918621U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR880004236Y1 (en) | Bearings | |
| US20190044409A1 (en) | Electric actuator | |
| US20190097492A1 (en) | Electrical actuator | |
| KR101719076B1 (en) | Slewing drive | |
| US11177718B2 (en) | Electric actuator with screw shaft | |
| US20190072163A1 (en) | Electric actuator | |
| CN219918621U (en) | Electric driving device | |
| JP6962454B2 (en) | Rotating machine | |
| US5575366A (en) | Vehicular charging generator | |
| KR950006625B1 (en) | Large rolling bearing with a free space in its centre having an integrated electrical direct drive | |
| JPS60157514A (en) | Rotary bearing provided with rotary displacement detector | |
| CN115833466A (en) | Motor of coaxial integrated magnetic gear speed reducer | |
| CN114147770A (en) | Split type encoder mounting structure and robot | |
| CN109477513B (en) | Module bearing and power transmission device provided with same | |
| CN217692890U (en) | Integrated large-load axial electric driving device | |
| CN108551247B (en) | Double-support double-stator permanent magnet synchronous traction machine | |
| JP5463629B2 (en) | Direct drive motor, mechanical device and wheel motor for electric vehicle | |
| CN108715188B (en) | Single-layer short spring double-baffle type torque signal acquisition device | |
| CN114352684A (en) | High-efficiency cycloidal pin gear speed reducer with sensor | |
| CN115208110A (en) | Integrated large-load axial electric driving device and mounting method | |
| JP7447914B2 (en) | Electric vehicle drive device | |
| CN216372271U (en) | Mechanical arm joint structure | |
| CN206364639U (en) | A kind of bearing arrangement of vertical machine | |
| CN217256390U (en) | Robot driving joint module with high-torque cycloidal speed reducer | |
| JP2021063564A (en) | Hub unit bearing with power generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |