CN212909220U - Oil cold-hot driven hollow motor shaft - Google Patents
Oil cold-hot driven hollow motor shaft Download PDFInfo
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- CN212909220U CN212909220U CN202021838501.4U CN202021838501U CN212909220U CN 212909220 U CN212909220 U CN 212909220U CN 202021838501 U CN202021838501 U CN 202021838501U CN 212909220 U CN212909220 U CN 212909220U
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Abstract
The utility model discloses a hollow motor shaft that oil cold electricity driven, including the motor shaft, the motor shaft is including the left spindle nose that is used for connecting driving motor, an interlude and a right spindle nose for the rotor is connected, left spindle nose, interlude and right spindle nose are fixed connection in proper order, the interlude is hollow cylinder, left spindle nose and right spindle nose all are equipped with the oil duct in axle center position, the fixed interpolation pipe that is equipped with in one end of being close to the interlude of oil duct of left spindle nose, interpolation pipe also is equipped with the oil duct in axle center position, the oil duct of interpolation pipe is extended by a left spindle nose oil duct side direction interlude one side, the oil duct of interpolation pipe is equipped with the oilhole at. The oil-cooled electrically-driven hollow motor shaft of the utility model has the advantages that the internal oil throwing position is controllable through the oil hole of the inner inserting pipe, so that the cooling effect is more uniform and better; and through the structural split of axle, effectively improve material utilization ratio, reduce machine tooling process, when lightening weight and cost, improved the refrigerated result.
Description
Technical Field
The utility model relates to an electric automobile's oil cold electricity drives part, especially a hollow motor shaft that oil cold electricity driven.
Background
The electric driving power is the core technology of new energy automobiles, and the oil-cold-electric driving of an electric driving power assembly becomes an important development direction due to higher power density, smaller volume and higher efficiency; at present, oil cold electric driving in the market mainly throws oil out through an oil duct and an oil hole in the center of a motor shaft when the motor rotates so as to reduce the temperature; the motor shaft has the disadvantages that the internal oil throwing position cannot be controlled, so that the cooling of the rotor at the outer side is uneven, the whole weight is heavier due to no lightweight structural design, the processing technology is complex and the cost is overhigh due to the motor shaft with a part of internal hollow structure. For example, a motor rotor and a motor having an oil cooling structure disclosed in chinese patent document, publication No. CN 207117341U. The oil inlet channel is arranged in the rotating shaft and is connected with an external oil supply oil way through at least one end of the rotating shaft; two balance plates are fixedly sleeved on the rotating shaft outside two ends of the iron core; a cooling channel is formed in the balance plate, is communicated with the end part of the magnetic steel, and is connected with the oil inlet channel at one side close to the radial center of the balance plate; but the defects that the cooling is carried out only through the inner wall of the oil duct, the oil is discharged from the two oil holes, the oil throwing position in the oil duct is not controllable, and the cooling is uneven, so that the integral cooling effect is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome prior art oil cold electricity drive inside get rid of oily position uncontrollable, the cooling is inhomogeneous, and lacks the problem of lightweight design, provides one kind and gets rid of the controllable, the heat transfer of oily position even, the hollow motor shaft that processing technology is simple's an oil cold electricity drives.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hollow motor shaft for oil-cooling electric driving comprises a motor shaft used for fixing a rotor and connecting the motor, wherein the motor shaft comprises a left shaft head used for connecting a driving motor, a middle section used for connecting the rotor and a right shaft head, the left shaft head, the middle section and the right shaft head are fixedly connected in sequence, the middle section is a hollow cylinder, oil passages are respectively arranged at the axial center positions of the left shaft head and the right shaft head, an inner insertion pipe is fixedly arranged at one end, close to the middle section, of the oil passage of the left shaft head, an oil passage is also arranged at the axial center position of the inner insertion pipe, the oil passage of the inner insertion pipe extends from one side of the oil passage of the left shaft head to one side of the middle section and does not penetrate through the inner insertion pipe, and an oil hole; the utility model discloses compare with current general oil electricity cold-electricity, rotation through interior intubate, on the oil duct inner wall of intubate including adhering to the coolant oil, and throw away the coolant oil through the oilhole, it becomes controllable to be put uncontrollable the oil position of throwing away originally, change the inhomogeneous condition of heat transfer originally, improve the heat transfer effect, compare with the hollow motor shaft that makes through the machining mode now, with the structure split of axle, utilize pipe section bar and forging technology, effectively improve material utilization, reduce the machining preface, lighten weight, reduce this simultaneously and subtract heavy, the radiating effect has been improved.
Preferably, a left shaft connecting boss is arranged on one side, close to the middle section, of the left shaft head, and the outer wall of the connecting boss is connected with the inner wall of the middle section through welding; the left shaft head is formed by forging, the boss is connected with the inner wall of the middle section in an interference fit mode through the left shaft, welding processing is carried out at the joint, the left shaft head and the middle section are connected, machining is carried out after the connection is completed, and machining procedures are reduced.
Preferably, a right shaft connecting boss is arranged on one side of the right shaft head close to the middle section, and the outer wall of the connecting boss is connected with the side wall of the middle section close to the right shaft head in a welding manner; the right spindle head is formed by forging, the boss is connected with the inner wall of the middle section in an interference fit mode through the right spindle, welding processing is carried out at the joint, the right spindle head and the middle section are connected, machining is carried out after the connection is completed, and machining procedures are reduced.
Preferably, a bearing mounting surface is arranged on one side, away from the middle section, of the right shaft head connecting boss, and a clamp spring groove is formed in the bearing mounting surface; the motor shaft is more accurate part, needs the bearing to be used for supporting mechanical rotating electrical machines when rotating to reduce the motor shaft and rotate the coefficient of friction of in-process, guarantee the gyration precision of motor shaft simultaneously, set up the bearing in the one side of keeping away from the motor, and fix the bearing through the jump ring on the jump ring groove, guarantee the normal use of motor shaft.
Preferably, the right shaft head is provided with a rotary transformer rotor mounting surface on one side of the bearing mounting surface, which is far away from the middle section, and the rotary transformer rotor mounting surface is provided with a key groove; the rotary transformer rotor is used for measuring the angular displacement and the angular speed of a motor shaft, the rotary transformer rotor can be fixed on the motor shaft through keys and key grooves, and relevant parameters of the motor are changed through measuring results of the rotary transformer rotor, so that the fixed position is located after oil throwing is changed, heat exchange is more uniform, and the heat exchange effect is better.
Preferably, a spline is arranged on one side, far away from the middle section, of the left shaft head, and a cylindrical positioning surface is arranged on one side, close to the middle section, of the spline of the left shaft head; the transmission of motor shaft belongs to high-speed and accurate transmission, links to each other with the actuating mechanism in the outside through the spline, ensures not to take place to skid between actuating mechanism and the motor shaft, simultaneously, has guaranteed the compactness and the reliability of connecting.
Preferably, the middle section and the cylindrical positioning surface are both provided with oil holes; set up the oilhole at the interlude for the oil after the heat transfer is accomplished can flow from whole mechanism through the oilhole of interlude, cyclic utilization after being convenient for, and when the oil in the intubate oil duct was too much, set up the oilhole at the cylinder locating surface, can make things convenient for the outflow when oil is too much, places the too much emergence of oil and blocks up.
Therefore, the utility model discloses following beneficial effect has: (1) the oil throwing position in the motor shaft is controllable, and the heat exchange is uniform; (2) the hollow shaft structure processed in sections is adopted, so that the processing difficulty is reduced, the material utilization rate is effectively improved, the machining sequence is reduced, and the weight is reduced; (3) the processing cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a hollow motor shaft driven by oil cold electricity;
FIG. 2 is a sectional view of embodiment 1.
1, a motor shaft; 2, a left shaft head; 3, a middle section; 4, a right shaft head; 5, an oil duct; 6, inserting a tube; 7, an oil hole; 8, connecting the left shaft with a boss; 9, connecting the right shaft with a boss; 10, bearing mounting surface; 11, a clamp spring groove; 12, rotating and changing the rotor mounting surface; 13, a key groove; 14, splines; 15, cylindrical positioning surface; 16, rotor mounting surface.
Detailed Description
The following provides a further description of embodiments of the present invention by way of examples and with reference to the accompanying drawings.
Example 1
In the embodiment 1 shown in fig. 1, an oil-cooling-electric-driven hollow motor shaft comprises a motor shaft 1 for fixing a rotor and connecting the motor, wherein the motor shaft comprises a left shaft head 2 for connecting a driving motor, a middle section 3 and a right shaft head 4 for connecting the rotor, a rotor mounting surface 16 is formed outside the middle section, a left shaft connecting boss 8 is arranged on one side close to the middle section of the left shaft head, the outer wall of the left shaft connecting boss is connected with the inner wall of the middle section through welding, a spline 14 is arranged on one side far away from the middle section of the left shaft head, a cylindrical positioning surface 15 is arranged on one side close to the middle section of the spline of the left shaft head, oil holes 7 are formed in the middle section and the cylindrical positioning surface, a right shaft connecting boss 9 is arranged on one side close to the middle section of the right shaft head, and the outer wall of the connecting boss is connected, the oil duct of the left spindle head is fixedly provided with an inner inserting pipe 6 at one end close to the middle section, the inner inserting pipe is also provided with an oil duct at the axis position, the oil duct of the inner inserting pipe extends from one end of the oil duct of the left spindle head to one side of the middle section and does not penetrate through the inner inserting pipe, and the oil duct of the inner inserting pipe is provided with an oil hole at the tail end of the oil duct close to the middle section.
During machining, the left shaft head and the right shaft head are forged into rough blanks, the large end of the inner side is machined with an outer circle spigot, an oil passage is machined in the blank, a seamless steel pipe section is used as the blank in the middle section, inner circle spigots are machined at the left end and the right end, one end of the inner inserting pipe is closed, and a throwing oil hole is drilled in the cylindrical surface of the closed end and used for throwing oil; the opening end of the inner inserting pipe is pressed into an internal oil passage hole of the left shaft head in an interference fit mode, and the oil passage is communicated.
Then, carrying out press fitting on the assembly of the left shaft head and the inner inserting tube and the middle section in a round spigot interference fit mode; then, carrying out round spigot interference fit on an assembly formed by the left shaft head, the inner inserting tube and the middle section and the right shaft head, and carrying out press mounting to form a complete hollow motor shaft blank; welding the combined hollow motor shaft blank, and performing welding treatment on circular spigot matching surfaces at two ends of the middle section to ensure the connection strength of the joints of the left shaft head and the right shaft head with the middle section respectively; finish machining is carried out on welded blank of the hollow motor shaft, a spline, a cylindrical positioning support surface and an oil hole are machined on a left shaft head, a rotor mounting surface and an oil hole are machined on the middle section, a bearing mounting surface, a clamp spring groove, a rotary rotor mounting surface and a rotary rotor mounting key groove are machined on a right shaft head, and heat treatment is carried out to ensure the hardness of each mounting surface; and finally, carrying out finish machining of grinding to ensure the coaxiality of the cylindrical positioning support surface of the left shaft head, the rotor mounting surface of the middle section and the bearing mounting surface of the right shaft head.
When the rotor shaft assembly is used, the cylindrical positioning surface of the left shaft head and the bearing mounting surface of the right shaft head support the whole rotor shaft system together, the rotating shaft is mounted on the rotor mounting surface at the middle section through interference fit, the middle section is in interference fit and welded connection through a round spigot, torque is transmitted to the left shaft head, and then the torque is transmitted out from a spline of the left shaft head; meanwhile, cooling oil enters from an inner hole of the left shaft head and flows rightwards, and part of the oil is thrown out from an oil hole of the cylindrical positioning surface to lubricate the spline; the oil enters the inner inserting pipe, is thrown out from the oil hole of the inner inserting pipe and splashes to the inner wall of the middle section, the middle part of the rotor is cooled firstly, the oil flows to two ends of the inner wall of the middle section, is thrown out from the oil hole of the middle section and enters an oil circuit in the rotor assembly, and the cooling and heat exchange effects are achieved; the motor shaft is reasonably split into four parts, namely a left shaft head, a right shaft head, a middle section and an inner inserting tube, so that the weight of the shaft is greatly reduced, the processing technology is simplified, the cost is reduced, the drop position of the thrown oil is controllable, and the heat dissipation effect is improved.
Claims (7)
1. The hollow motor shaft is characterized by comprising a left shaft head (2) used for connecting a driving motor, a middle section (3) used for connecting the rotor and a right shaft head (4), wherein the left shaft head, the middle section and the right shaft head are sequentially and fixedly connected, the middle section is a hollow cylinder, the left shaft head and the right shaft head are respectively provided with an oil duct (5) in the axis position, an inner inserting pipe (6) is fixedly arranged at one end, close to the middle section, of the oil duct of the left shaft head, the oil duct of the inner inserting pipe is also provided with an oil duct in the axis position, the oil duct of the inner inserting pipe extends from one end of the left oil duct shaft head to one side of the middle section and does not penetrate through the inner inserting pipe, and the oil duct of the inner inserting pipe is provided with an oil hole (7) at the tail end of the oil duct.
2. The hollow motor shaft of oil cold electric drive according to claim 1, characterized in that, the left shaft head is provided with a left shaft connecting boss (8) at one side near the middle section, and the outer wall of the connecting boss is connected with the inner wall of the middle section by welding.
3. The hollow motor shaft of oil cold electric drive according to claim 1, characterized in that the right spindle head is provided with a right spindle connecting boss (9) at one side near the middle section, and the outer wall of the connecting boss is connected with the side wall near the right spindle head at the middle section by welding.
4. The oil-cooled electric-driven hollow motor shaft as claimed in claim 3, wherein the right shaft head is provided with a bearing mounting surface (10) on one side of the right shaft connecting boss far away from the middle section, and the bearing mounting surface is provided with a snap spring groove (11).
5. The hollow motor shaft of oil chiller-electric drive as claimed in claim 4, wherein said right stub shaft is provided with a mounting surface (12) for a rotary transformer rotor on a side of the bearing mounting surface remote from the center section, said mounting surface for the rotary transformer rotor being provided with a key groove (13).
6. The hollow motor shaft of oil cold electric drive according to claim 2, characterized in that, the left spindle head is provided with a spline (14) at a side far away from the middle section, and the left spindle head is provided with a cylindrical positioning surface (15) at a side of the spline near the middle section.
7. The hollow motor shaft for oil chiller-electric drive as set forth in any one of claims 1 to 6, wherein said intermediate section and said cylindrical locating surface are provided with oil holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021838501.4U CN212909220U (en) | 2020-08-28 | 2020-08-28 | Oil cold-hot driven hollow motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021838501.4U CN212909220U (en) | 2020-08-28 | 2020-08-28 | Oil cold-hot driven hollow motor shaft |
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| Publication Number | Publication Date |
|---|---|
| CN212909220U true CN212909220U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021838501.4U Active CN212909220U (en) | 2020-08-28 | 2020-08-28 | Oil cold-hot driven hollow motor shaft |
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| CN (1) | CN212909220U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098188A (en) * | 2021-04-21 | 2021-07-09 | 恒大新能源汽车投资控股集团有限公司 | Hollow rotor shaft |
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
| CN113206563A (en) * | 2021-04-21 | 2021-08-03 | 浙江零跑科技有限公司 | Oil cold-hot electric driving power rotor structure |
| CN113572289A (en) * | 2021-07-05 | 2021-10-29 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| CN113675980A (en) * | 2021-06-28 | 2021-11-19 | 东风汽车集团股份有限公司 | Electric automobile and driving motor and power assembly thereof |
-
2020
- 2020-08-28 CN CN202021838501.4U patent/CN212909220U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141074A (en) * | 2021-04-09 | 2021-07-20 | 浙江零跑科技有限公司 | Rotor structure of permanent magnet synchronous motor and manufacturing method thereof |
| CN113098188A (en) * | 2021-04-21 | 2021-07-09 | 恒大新能源汽车投资控股集团有限公司 | Hollow rotor shaft |
| CN113206563A (en) * | 2021-04-21 | 2021-08-03 | 浙江零跑科技有限公司 | Oil cold-hot electric driving power rotor structure |
| CN113675980A (en) * | 2021-06-28 | 2021-11-19 | 东风汽车集团股份有限公司 | Electric automobile and driving motor and power assembly thereof |
| CN113675980B (en) * | 2021-06-28 | 2022-11-01 | 东风汽车集团股份有限公司 | Electric automobile and driving motor and power assembly thereof |
| CN113572289A (en) * | 2021-07-05 | 2021-10-29 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| CN113572289B (en) * | 2021-07-05 | 2022-05-31 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| WO2023279591A1 (en) * | 2021-07-05 | 2023-01-12 | 合肥巨一动力系统有限公司 | Oil-cooled hollow rotating shaft structure and oil-cooled rotor structure |
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Address after: 310051 1st and 6th floors, no.451 Internet of things street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zero run Technology Co.,Ltd. Address before: 310051 1st and 6th floors, no.451 Internet of things street, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG LEAPMOTOR TECHNOLOGY Co.,Ltd. |