CN212726712U - Motor shaft - Google Patents

Abstract

The utility model discloses a motor shaft, a hollow structure is arranged on the axial direction of at least one end of the motor shaft, a cooling liquid pumping mechanism with a spiral groove is arranged on the position of the hollow structure near the shaft end, so that the cooling liquid can enter the hollow structure by means of the attraction force generated by the rotation of the motor shaft; the spiral groove is arranged on the inner surface of the annular part, the annular part is fixedly assembled on the hollow structure, or the spiral groove is directly arranged on the inner surface of the hollow structure; the motor shaft is radially provided with a plurality of groups of cooling liquid channels, the cooling liquid channels are communicated with the hollow structure, and when the motor shaft rotates, oil in the hollow structure is thrown out through the cooling liquid channels for cooling the internal components of the motor shell. The utility model discloses in through setting up hollow structure and coolant liquid pumping mechanism, form the structure of similar pump, when the motor shaft is rotatory, the coolant liquid can be sucked in hollow structure, then throws away through the coolant liquid way, realizes improving the heat-sinking capability of motor casing internal component to the cooling and lubrication of realization.

Description

Motor shaft

Technical Field

The utility model belongs to the technical field of the motor is made, in particular to motor shaft.

Background

With the development of the automobile manufacturing industry, the continuous performance of the new energy automobile motor becomes an important technical index of the manufacturing quality of modern automobiles. The continuous performance of the motor is mainly related to the loss heating and cooling heat dissipation capacity of the motor, and the loss heating of the motor is related to the hardware design of the motor. How to carry out the optimal design to cooling structure can effectively improve the heat-sinking capability of motor to improve the persistence performance of motor and even vehicle is the direction of effort of each big whole car manufacturing enterprise and spare part enterprise of international automobile industry.

The main factors influencing the continuous power and the continuous performance of the motor are electromagnetic design and structural design, such as copper loss, iron loss, mechanical loss and the like. For the new energy automobile motor, the key point for improving the continuous performance is how to reduce various losses or improve the heat dissipation capacity. Since the various losses are limited by the desired target performance, there is limited space to reduce the losses from the hardware itself, and optimization of the cooling structure becomes an efficient, low cost solution.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model discloses a motor shaft to overcome above-mentioned problem or solve above-mentioned problem at least partially.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a motor shaft, a hollow structure is arranged in the axial direction of at least one end of the motor shaft, a cooling liquid pumping mechanism with a spiral groove is arranged at the position close to the end of the hollow structure, so that cooling liquid can enter the hollow structure by means of attraction force generated by the rotation of the motor shaft;

the spiral groove is arranged on the inner surface of a ring-shaped piece which is fixedly assembled on the hollow structure, or the spiral groove is directly arranged on the inner surface of the hollow structure;

the motor shaft is provided with a plurality of groups of cooling liquid channels in the radial direction, the cooling liquid channels are communicated with the hollow structure, and when the motor shaft rotates, oil in the hollow structure is thrown out through the cooling liquid channels and is used for cooling components in the motor shell.

Further, the coolant pumping mechanism further comprises a mandrel, the mandrel is arranged inside the spiral groove, and the spiral groove and the mandrel can rotate relatively.

Furthermore, the mandrel is fixedly connected with or integrally arranged with a hollow tube arranged at the end, the hollow tube is communicated with the outside of the motor shaft, and a plurality of radial holes are arranged on the tube wall of the hollow tube at positions close to the spiral groove.

Furthermore, the hollow pipe is a flared pipe, the mandrel is fixedly arranged in the flared pipe far away from the end side, and the mandrel extends towards the flared opening of the flared pipe at the radial hole and is used for increasing the attraction of the cooling liquid pumping mechanism.

Further, the hollow tube is engaged with an external coolant tube, or the hollow tube extends out of the motor shaft for receiving the coolant inside the motor housing.

Further, the hollow tube is fixed with the motor shell assembly.

Further, the clearance distance between the mandrel and the spiral groove in the radial direction is adjustable.

Further, the coolant pumping mechanisms are arranged at one end or two ends of the motor shaft, and the coolant pumping mechanisms at the two ends are the same or different.

Further, the cooling fluid passage may be inclined or disposed perpendicular to the axis of the motor shaft as needed for cooling or lubricating any one or more of a motor bearing, a stator winding, or a rotor.

Furthermore, each group of cooling liquid channels comprises a plurality of cooling liquid channels which are uniformly distributed on the motor shaft; and/or the presence of a gas in the gas,

an annular groove is formed in the outer side of the spiral groove and close to the shaft end, and cooling liquid enters the spiral groove through the annular groove.

The utility model has the advantages and beneficial effects that:

the utility model discloses in through set up hollow structure in the motor shaft to set up coolant pump sending mechanism in hollow structure, form the structure similar to the pump, when the motor shaft is rotatory, the coolant liquid can rely on the appeal that the motor shaft rotation produced to enter into hollow structure, then throws away through the coolant liquid way, realizes cooling and lubricating to motor casing internal component, has effectively improved the heat-sinking capability of motor, has improved the continuation performance of motor; and the motor shaft of the utility model has simple structure and easy manufacture.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is an axial cross-sectional view of a motor shaft in one embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of a motor shaft in one embodiment of the present invention;

FIG. 3 is an axial cross-sectional view of a motor shaft in one embodiment of the present invention;

fig. 4 is a position structure diagram of a cooling liquid pumping mechanism in one embodiment of the present invention;

fig. 5 is an axial cross-sectional view of a motor shaft with an assembled rotor in accordance with an embodiment of the present invention.

In the figure: 1. hollow structure, 2, spiral groove, 3, cyclic annular spare, 4, coolant liquid way, 5, dabber, 6, hollow tube, 7, annular groove.

Detailed Description

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to perform clear and complete description of the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The utility model discloses a motor shaft in one embodiment, as shown in fig. 1-3, this motor shaft is provided with hollow structure 1 in the axial of at least one end, sets up hollow structure 1 in the axial of one end, and the other end axle is solid structure or enclosed construction, and when both ends axle were for being equipped with hollow structure 1, this hollow structure 1 axially ran through whole motor shaft, hollow structure 1 was provided with the coolant pumping mechanism of taking spiral slot 2 near the position of end, and coolant pumping mechanism is similar to the structure of water pump, and when the motor shaft rotated, coolant pumping mechanism made coolant can rely on the appeal that the motor shaft rotation produced to enter into hollow structure 1; when both end shafts are provided with hollow structures 1, the coolant pumping mechanism can be arranged in the hollow structures 1 at both ends of the motor shaft or in the hollow structure 1 only at one end of the motor shaft, respectively.

The spiral groove 2 is arranged on the inner surface of the annular part 3, the annular part 3 is fixedly assembled on the hollow structure 1, the spiral groove 2 is processed on the annular part 3, then the annular part 3 is assembled in the hollow structure 1, or the spiral groove 2 is directly arranged on the inner surface of the hollow structure 1, and when a motor shaft is processed, the spiral groove 2 is directly processed on the inner surface of the hollow structure 1; the length of the spiral groove 2 can be designed as desired.

The motor shaft is radially provided with a plurality of groups of cooling liquid channels 4, the cooling liquid channels 4 are communicated with the hollow structure 1, and when the motor shaft rotates, oil in the hollow structure 1 is thrown out through the cooling liquid channels 4 and is used for cooling and lubricating internal components of the motor shell.

In conclusion, in the embodiment, the hollow structure 1 is arranged in the motor shaft, and the cooling liquid pumping mechanism is arranged in the hollow structure 1 to form a structure similar to a pump, when the motor shaft rotates, the cooling liquid can enter the hollow structure 1 by virtue of attraction force generated by rotation of the motor shaft and then is thrown out through the cooling liquid channel 4, so that cooling and lubrication of internal components in the motor shell are realized, the heat dissipation capacity of the motor is effectively improved, and the continuous performance of the motor is improved; and the motor shaft of the utility model has simple structure and easy manufacture.

In one embodiment, as shown in fig. 4, the cooling liquid pumping mechanism further includes a mandrel 5, the mandrel 5 is disposed inside the spiral groove 2 and located at an inner diameter of the spiral groove 2, when the motor shaft rotates, the spiral groove 2 and the mandrel 5 can rotate relatively, the spiral groove 2 and the mandrel 5 form a structure similar to a pump, and when the two rotate relatively, liquid can be pumped into the hollow structure 1 from one end to the other end, that is, oil is pumped into the hollow structure 1, so that more oil enters the hollow structure 1, and at the same time, the pressure of the oil in the hollow structure 1 is increased, so that the oil is sprayed out from the cooling liquid channel 4.

In one embodiment, the mandrel 5 is fixedly connected or integrally disposed with a hollow tube 6 disposed at the end, the hollow tube 6 is communicated with the outside of the motor shaft, the hollow tube 6 is in clearance fit with the hollow structure 1, as can be seen from fig. 1 to 3, one end of the hollow tube 6 is fixedly connected with the mandrel 5, the other end of the hollow tube 6 is communicated with the outside of the motor shaft, a plurality of radial holes are disposed on the tube wall of the hollow tube 6 at positions close to the spiral grooves 2, and oil in the hollow tube 6 enters the spiral grooves 2 through the radial holes.

In a preferred embodiment, as shown in fig. 1, the hollow tube 6 is a bell-mouthed tube, which is configured to facilitate collection of oil, so as to allow more oil to enter the hollow structure 1, and the mandrel 5 is fixedly disposed inside a side of the bell-mouthed tube away from the end, as can be seen from fig. 4, the mandrel 5 extends toward a bell-mouthed opening of the bell-mouthed tube at the radial hole, so as to increase the attraction force of the coolant pumping mechanism.

In one embodiment, said hollow tube 6 may be engaged with an external coolant tube, the coolant inside the coolant tube entering directly into the hollow tube 6; the hollow tube 6 may also extend out of the motor shaft for receiving cooling fluid inside the motor housing, which may be splashed, sprayed or otherwise introduced into the hollow tube 6. Due to the clearance fit between the hollow tube 6 and the motor shaft, the cooling liquid inside the motor housing can also be sucked directly into the hollow structure 1 inside the motor shaft through this clearance.

In one embodiment, the hollow tube 6 is fixed to the motor housing assembly, and this design can make the hollow tube 6 relatively stationary when the motor shaft rotates, and because the hollow tube 6 is fixedly connected to the mandrel 5, the mandrel 5 can be kept stationary when the motor shaft rotates, and the relative movement between the mandrel 5 and the spiral groove 2 is realized.

In one embodiment, the radial gap distance between the mandrel 5 and the spiral groove 2 is adjustable, and the diameter of the mandrel 5 and the diameter of the spiral groove 2 can be adjusted as required, so that the radial distance between the mandrel 5 and the spiral groove 2 can be adjusted.

In one embodiment, as shown in fig. 1-3, when the hollow structure 1 is provided at both ends of the motor shaft, the coolant pumping mechanism is disposed at one end or both ends of the motor shaft, and may be disposed as required, and the coolant pumping mechanisms at both ends are the same or different, and the coolant pumping mechanisms at both ends may differ in size, position or shape.

In one embodiment, as shown in fig. 5, the cooling fluid passage 4 may be angled or disposed perpendicular to the axis of the motor shaft as needed to cool or lubricate any one or more of the motor bearings, stator windings, or rotor. When the motor bearing is cooled and lubricated, the cooling liquid channel 4 is arranged at the bearing position, and when the motor shaft rotates, oil is thrown to the motor bearing through the cooling liquid channel 4; when the stator winding is cooled, the cooling liquid channel 4 is arranged at the position of the stator winding, and when the motor shaft rotates, oil is thrown to the stator winding through the cooling liquid channel 4; when cooling the rotor, cooling liquid channel 4 sets up in rotor both ends position, and sets up to the rotor slope, and when the motor shaft was rotatory, fluid drew oil to the rotor through cooling liquid channel 4 at this place.

In one embodiment, each set of cooling fluid passages 4 comprises a plurality of passages disposed on the motor shaft.

As shown in fig. 4, an annular groove 7 is provided on the inner wall of the hollow structure 1, which is close to the shaft end, outside the spiral groove 2, the spiral groove 2 is communicated with the annular groove 7, a radial hole is provided on the hollow tube 6 at the annular groove 7, the cooling liquid in the hollow tube 6 enters the annular groove 7 through the radial hole, and the cooling liquid enters the spiral groove 2 through the annular groove 7.

To sum up, the utility model discloses a motor shaft, a hollow structure is arranged on the axial direction of at least one end of the motor shaft, a cooling liquid pumping mechanism with a spiral groove is arranged on the position of the hollow structure near the shaft end, so that the cooling liquid can enter the hollow structure by means of the attraction force generated by the rotation of the motor shaft; the spiral groove is arranged on the inner surface of the annular part, the annular part is fixedly assembled on the hollow structure, or the spiral groove is directly arranged on the inner surface of the hollow structure; the motor shaft is radially provided with a plurality of groups of cooling liquid channels, the cooling liquid channels are communicated with the hollow structure, and when the motor shaft rotates, oil in the hollow structure is thrown out through the cooling liquid channels for cooling the internal components of the motor shell. The utility model discloses in through setting up hollow structure and coolant liquid pumping mechanism, form the structure of similar pump, when the motor shaft is rotatory, the coolant liquid can be sucked in hollow structure, then throws away through the coolant liquid way, realizes the cooling and the lubrication to motor casing inner assembly, has improved the heat-sinking capability of motor.

The above description is only for the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims (10)

1. A motor shaft is characterized in that a hollow structure is arranged on at least one end of the motor shaft in the axial direction, and a cooling liquid pumping mechanism with a spiral groove is arranged on the hollow structure at a position close to the end, so that cooling liquid can enter the hollow structure by virtue of attraction force generated by rotation of the motor shaft;

the spiral groove is arranged on the inner surface of a ring-shaped piece which is fixedly assembled on the hollow structure, or the spiral groove is directly arranged on the inner surface of the hollow structure;

the motor shaft is provided with a plurality of groups of cooling liquid channels in the radial direction, the cooling liquid channels are communicated with the hollow structure, and when the motor shaft rotates, oil in the hollow structure is thrown out through the cooling liquid channels and is used for cooling components in the motor shell.

2. The motor shaft of claim 1, wherein the coolant pumping mechanism further includes a mandrel disposed within the helical groove, the helical groove being rotatable relative to the mandrel.

3. The motor shaft as claimed in claim 2, wherein the mandrel is fixedly connected or integrally disposed with a hollow tube disposed at the end, the hollow tube is communicated with an outside of the motor shaft, and a plurality of radial holes are disposed on a wall of the hollow tube at positions close to the spiral grooves.

4. The motor shaft of claim 3, wherein the hollow tube is a bell-mouthed tube, the mandrel is fixedly disposed inside a side of the bell-mouthed tube remote from the end, and the mandrel extends at the radial hole toward a bell-mouthed opening of the bell-mouthed tube for increasing the suction of the coolant pumping mechanism.

5. The motor shaft of claim 3, wherein the hollow tube engages an external coolant tube or the hollow tube extends out of the motor shaft for receiving coolant inside the motor housing.

6. The motor shaft as set forth in any one of claims 3-5, wherein the hollow tube is secured to the motor housing assembly.

7. The motor shaft as set forth in any one of claims 2-5, wherein a radial clearance distance between the mandrel and the helical groove is adjustable.

8. The motor shaft of any of claims 1-5, wherein the coolant pumping mechanism is disposed at one or both ends of the motor shaft, and the coolant pumping mechanisms at the two ends are the same or different.

9. The motor shaft of any of claims 1-5, wherein the cooling fluid passage is angled or disposed perpendicular to the axis of the motor shaft as needed for cooling or lubricating any one or more of a motor bearing, stator winding, or rotor.

10. The motor shaft as set forth in any one of claims 1-5, wherein each set of cooling fluid passages includes a plurality of passages uniformly disposed on the motor shaft; and/or the presence of a gas in the gas,

an annular groove is formed in the outer side of the spiral groove and close to the shaft end, and cooling liquid enters the spiral groove through the annular groove.

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