CN220087046U - High-speed motor - Google Patents

Abstract

The utility model provides a high-speed motor, and relates to the technical field of electromechanics. The utility model provides a high-speed motor, which comprises a shell, an output shaft, two bearings and two end covers, wherein the shell is provided with a first end cover and a second end cover; the two bearings are respectively sleeved at two opposite ends of the output shaft, the two end covers are respectively sleeved on the two bearings, and the two end covers are positioned in the shell and are respectively connected with the shell; the bearing comprises an inner floating ring and at least one outer floating ring; at least one outer floating ring is sleeved on the periphery of the inner floating ring, and the inner floating ring is sleeved on the periphery of the output shaft; when the output shaft rotates, the output shaft, the inner floating ring and at least one outer floating ring rotate in sequence, so that a rotating speed difference is formed between every two of the output shafts. The high-speed motor obtained through the design can be more matched with the rotating speed requirement of the high-speed motor through the arrangement of the bearing with the multistage floating ring structure, so that the rotating speed of the high-speed motor is effectively improved.

Description

High-speed motor

Technical Field

The utility model relates to the technical field of electromechanics, in particular to a high-speed motor.

Background

At present, a high-speed motor of a vehicle grade usually adopts a deep groove ball bearing or an angular contact bearing, and the allowable rotating speed of the bearing can not meet the requirement of the high-speed motor, so that the rotating speed of the domestic high-speed motor is below 3 ten thousand rpm, and the development of the domestic high-speed motor is limited. Therefore, a high-speed motor capable of meeting the high-speed requirement of the motor and increasing the rotation speed is needed to solve the above problems.

Disclosure of Invention

The utility model provides a high-speed motor, and aims to solve the problem that the rotating speed of the domestic high-speed motor cannot be effectively improved because the rotating speed requirement of the high-speed motor cannot be met by the existing bearing in the prior art.

Embodiments of the present utility model are implemented as follows:

in one aspect of the embodiment of the utility model, a high-speed motor is provided, which comprises a casing, an output shaft, two bearings and two end covers; the two bearings are respectively sleeved at two opposite ends of the output shaft, the two end covers are respectively sleeved on the two bearings, and the two end covers are positioned in the shell and are respectively connected with the shell; the bearing comprises an inner floating ring and at least one outer floating ring; at least one outer floating ring is sleeved on the periphery of the inner floating ring, and the inner floating ring is sleeved on the periphery of the output shaft; when the output shaft rotates, the output shaft, the inner floating ring and at least one outer floating ring rotate in sequence, so that a rotating speed difference is formed between every two of the output shafts.

Optionally, a through oil inlet channel is arranged on the end cover, and the outlet end of the oil inlet channel faces the bearing.

Optionally, at least one outer floating ring is provided with a first axial oil groove which is communicated with the oil inlet channel, and one end of the first axial oil groove, which is close to the end cover, is provided with an oil storage cavity.

Optionally, a second axial oil groove is formed in the inner floating ring, the second axial oil groove is communicated with the first axial oil groove, and an oil storage cavity is formed in one end, close to the at least one outer floating ring, of the second axial oil groove.

Optionally, the end cover is equipped with two spaced retaining ring grooves corresponding to the bearing, two elastic retaining rings are arranged between the end cover and the output shaft, the two elastic retaining rings are inserted in the two retaining ring grooves in a one-to-one correspondence manner, and the two elastic retaining rings are used for mutually matching to axially limit the bearing.

Optionally, one side of the outer floating ring, which is close to the inner floating ring, is provided with a shoulder blocking ring, the shoulder blocking ring is arranged at one end of the outer floating ring, and the shoulder blocking ring is used for limiting the inner floating ring.

Optionally, the high-speed motor further comprises a bearing baffle plate, wherein the bearing baffle plate is arranged on one side of the bearing away from the shoulder blocking ring and used for axially limiting the bearing.

Optionally, the high-speed motor further comprises a sealing cover, and the sealing cover is sleeved between the end cover and the output shaft.

Optionally, the high-speed motor further comprises a stator and a rotor, the rotor is sleeved on the outer side of the output shaft and arranged between the two bearings, and the stator is sleeved on the outer side of the rotor and fixedly connected with the shell into an integrated structure.

Optionally, an oil return cavity is further arranged on the shell and is communicated with the bearing.

The beneficial effects of the embodiment of the utility model include: the high-speed motor provided by the embodiment of the utility model comprises a shell, an output shaft, two bearings and two end covers; the two bearings are respectively sleeved at two opposite ends of the output shaft, the two end covers are respectively sleeved on the two bearings, and the two end covers are positioned in the shell and are respectively connected with the shell so as to provide a certain protection effect for the internal structure of the motor; the bearing comprises an inner floating ring and at least one outer floating ring; the bearing can realize a multistage floating ring structure by the arrangement, so as to more match the rotating speed requirement of the high-speed motor; when the output shaft rotates, the output shaft, the inner floating ring and at least one outer floating ring rotate in sequence, so that a rotating speed difference is formed between every two of the output shaft, the multistage floating ring structure can allow the rotating speed reached by the motor to be higher, and then the rotating speed of the high-speed motor is effectively improved. The high-speed motor obtained through the design can be more matched with the rotating speed requirement of the high-speed motor through the arrangement of the bearing with the multistage floating ring structure, so that the rotating speed of the high-speed motor is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a high-speed motor according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a high-speed motor according to an embodiment of the present utility model;

fig. 3 is an enlarged detail view of a bearing section provided by an embodiment of the present utility model.

Icon: 100-high-speed motor; 110-a housing; 120-output shaft; 130-bearings; 131-an inner floating ring; 1311-second axial oil grooves; 132-an outer floating ring; 1321-a first axial oil groove; 1322-shoulder ring; 133-circlips; 134-bearing shield; 135-an oil storage cavity; 140-end caps; 141-an oil inlet passage; 1411-an inlet end; 1412-an outlet end; 142-sealing cover; 150-stator; 160-rotor.

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 in 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, but not all, embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, in one aspect of the embodiment of the present utility model, a high-speed motor 100 is provided, which includes a housing 110, an output shaft 120, two bearings 130, and two end covers 140; the two bearings 130 are respectively sleeved at two opposite ends of the output shaft 120, the two end covers 140 are respectively sleeved on the two bearings 130, and the two end covers 140 are positioned in the casing 110 and are respectively connected with the casing 110; bearing 130 includes an inner floating ring 131 and at least one outer floating ring 132; at least one outer floating ring 132 is sleeved on the outer periphery of the inner floating ring 131, and the inner floating ring 131 is sleeved on the outer periphery of the output shaft 120; when the output shaft 120 rotates, the output shaft 120, the inner floating ring 131 and at least one outer floating ring 132 sequentially rotate, so that a rotational speed difference is formed between every two.

Specifically, the present utility model provides a high-speed motor 100, which has a casing 110, an output shaft 120 is disposed in the casing 110, and bearings 130 are respectively sleeved on opposite ends of the output shaft 120. The left and right ends of the casing 110 are respectively provided with an end cover 140, and the two end covers 140 and the casing 110 are fixedly connected into an integrated structure through bolts so as to provide sealing and protecting functions for the internal part structure of the casing 110; one end of the output shaft 120 is threaded through and out of one of the end caps 140.

The bearing 130 is sleeved at two opposite ends of the output shaft 120, and specifically includes an inner floating ring 131 and at least one outer floating ring 132; the inner floating ring 131 is sleeved on the outer periphery of the output shaft 120, and at least one outer floating ring 132 is sleeved on the outer periphery of the inner floating ring 131. When the output shaft 120 rotates, the inner floating ring 131 and the at least one outer floating ring 132 also rotate in sequence, and a certain rotation speed difference is generated between every two, so that the motor can be allowed to reach a higher rotation speed.

It should be noted that, in the embodiment of the present utility model, the bearing 130 is a multi-stage floating ring structure. The two-stage floating ring structure of fig. 2 of the present utility model is exemplified as an inner floating ring 131 sleeved on the outer periphery of the output shaft 120, and an outer floating ring 132 sleeved on the outer periphery of the inner floating ring 131. When the output shaft 120 rotates, the rotation speed of the inner floating ring 131 is lower than the rotation speed of the output shaft 120, and the rotation speed of the outer floating ring 132 is also lower than the rotation speed of the inner floating ring 131, so that a rotation speed difference is formed among the outer floating ring 132, the inner floating ring 131 and the output shaft 120, the rotation speeds are gradually decreased, and the rotation speed reached by the high-speed motor 100 can be allowed to be higher;

similarly, if the bearing 130 is required to be configured as a three-stage floating ring structure, only a floating ring is added to the outer periphery of the outer floating ring 132 based on the two-stage floating ring structure, so as to form the three-stage floating ring structure. The more the number of stages of the bearing 130 of the multi-stage floating ring structure, the higher the rotational speed that the motor can be allowed to reach. In the actual production process, the number of stages of the bearing 130 can be adjusted and changed according to the actual situation and the rotation speed requirement, and the utility model is not limited in any way.

The high-speed motor 100 provided by the embodiment of the utility model comprises a shell 110, an output shaft 120, two bearings 130 and two end covers 140; the two bearings 130 are respectively sleeved at two opposite ends of the output shaft 120, the two end covers 140 are respectively sleeved on the two bearings 130, and the two end covers 140 are positioned in the casing 110 and are respectively connected with the casing 110 so as to provide a certain protection effect for the internal structure of the motor; bearing 130 includes an inner floating ring 131 and at least one outer floating ring 132; at least one outer floating ring 132 is sleeved on the outer periphery of the inner floating ring 131, and the inner floating ring 131 is sleeved on the outer periphery of the output shaft 120, so that the bearing 130 can realize a multi-stage floating ring structure by the arrangement, and the rotating speed requirement of the high-speed motor 100 can be matched more; when the output shaft 120 rotates, the output shaft 120, the inner floating ring 131 and at least one outer floating ring 132 rotate in sequence, so that a rotation speed difference is formed between every two of the output shafts, and the multistage floating ring structure can allow the rotation speed reached by the motor to be higher, so that the rotation speed of the high-speed motor 100 is effectively improved. The high-speed motor 100 obtained by the design can be more matched with the rotating speed requirement of the high-speed motor 100 through the arrangement of the bearing 130 with the multistage floating ring structure, so that the rotating speed of the high-speed motor 100 is effectively improved.

In one embodiment of the present utility model, as shown in fig. 2, the end cap 140 is provided with a through oil inlet passage 141, and an outlet end 1412 of the oil inlet passage 141 faces the bearing 130.

Specifically, the left end and the right end of the high-speed motor 100 are fixedly connected with an end cover 140, the two end covers 140 are respectively provided with an oil inlet channel 141, the oil inlet channels 141 are arranged in the end cover 140 in a penetrating manner, the outlet ends 1412 of the oil inlet channels face the bearing 130, and the inlet ends 1411 are communicated with the outside. An external oil feeder can be connected to the inlet end 1411 of the oil feed passage 141 and feed oil into the outlet end 1412 through the oil feed passage 141 to supply the oil to the installation position of the bearing 130. By providing the oil inlet passage 141, the outside can be more conveniently and rapidly supplied with oil to the bearing 130, so that an oil film is formed in the bearing 130 to lubricate the bearing 130.

In one implementation of the present utility model, as shown in fig. 2 and 3, at least one outer floating ring 132 is provided with a first axial oil groove 1321 therethrough, the first axial oil groove 1321 on the at least one outer floating ring 132 communicates with the oil inlet channel 141, and an end of the first axial oil groove 1321 near the end cover 140 is provided with an oil storage cavity 135.

Specifically, the outer floating ring 132 is provided with a first axial oil groove 1321 therethrough, and the first axial oil groove 1321 communicates with the oil inlet channel 141. Taking the drawing of the present utility model as an example, the bearing 130 of the high-speed motor 100 provided by the present utility model is a two-stage floating ring bearing 130, which is provided with an outer floating ring 132, a first axial oil groove 1321 is provided on the outer floating ring 132, one end of the first axial oil groove 1321 is communicated with the oil inlet channel 141, and the other end is communicated with the inner floating ring 131. And the side of the first axial oil groove 1321 near the end cover 140 is provided with an oil storage cavity 135, taking the two-stage floating ring structure shown in fig. 3 of the present utility model as an example, the side of the first axial oil groove 1321 near the end cover 140 is provided with the oil storage cavity 135, when one end of the first axial oil groove 1321 is communicated with the oil inlet channel 141, the oil inside the oil inlet channel 141 can fully and smoothly flow into the first axial oil groove 1321 through the oil storage cavity 135. With this arrangement, oil can flow into the first axial oil groove 1321 through the inlet end 1411 of the oil inlet passage 141, and an oil film can be formed between the outer floating ring 132 and the inner floating ring 131. The oil film can not only play a lubricating role, so that the rotation between the inner floating ring 131 and the outer floating ring 132 is more flexible, but also play a cooling role, and the reliability of the bearing 130 in use is improved.

As shown in fig. 2 and 3, the inner floating ring 131 is provided with a second axial oil groove 1311 therethrough, the second axial oil groove 1311 communicates with the first axial oil groove 1321, and an end of the second axial oil groove 1311 adjacent to the at least one outer floating ring 132 is provided with an oil storage cavity 135.

Specifically, the inner floating ring 131 is provided with a second axial oil groove 1311 therethrough, and the second axial oil groove 1311 communicates with the first axial oil groove 1321. Taking the drawing of the utility model as an example, the bearing 130 of the high-speed motor 100 provided by the drawing of the utility model is a two-stage floating ring bearing 130, a first axial oil groove 1321 which is communicated is arranged on the outer floating ring 132, one end of the first axial oil groove 1321 is communicated with the oil inlet channel 141, and the other end is communicated with the inner floating ring 131; the inner floating ring 131 is provided with a second axial oil groove 1311 which penetrates through the inner floating ring, one end of the second axial oil groove 1311 is communicated with the oil inlet passage 141, and the other end is connected with the output shaft 120. And the side of the second axial oil groove 1311, which is close to the at least one outer floating ring 132, is provided with an oil storage cavity 135, taking the two-stage floating ring structure shown in fig. 3 as an example, the side of the second axial oil groove 1311, which is close to the at least one outer floating ring 132, is provided with the oil storage cavity 135, and when one end of the second axial oil groove 1311 is communicated with the first axial oil groove 1321, the oil inside the first axial oil groove 1321 can sufficiently and smoothly flow into the second axial oil groove 1311 through the oil storage cavity 135. When oil flows into the second axial oil groove 1311 through the first axial oil groove 1321, an oil film is formed between the inner floating ring 131 and the outer floating ring 132, and similarly, the oil in the second axial oil groove 1311 forms an oil film between the inner floating ring 131 and the output shaft 120.

The oil film can not only play a lubricating role, so that the rotation between the inner floating ring 131 and the output shaft 120 is more flexible, but also play a cooling role, and the reliability of the bearing 130 in use is improved.

As shown in fig. 2 and 3, two spaced ring grooves are formed at the end cover 140 corresponding to the bearing 130, two elastic rings 133 are disposed between the end cover 140 and the output shaft 120, the two elastic rings 133 are inserted into the two ring grooves in a one-to-one correspondence manner, and the two elastic rings 133 are used for mutually cooperating to axially limit the bearing 130.

Specifically, the end cover 140 is sleeved on the outer periphery of the bearing 130, two spaced retaining ring grooves are disposed at positions corresponding to the bearing 130, and the two retaining ring grooves are disposed on the left and right sides of the bearing 130 respectively. Two elastic check rings 133 are disposed between the end cover 140 and the output shaft 120, and the two elastic check rings 133 are disposed in the check ring grooves respectively, so as to be disposed on the left and right sides of the bearing 130 respectively.

Through the arrangement of the elastic retainer ring 133, the bearing 130 can be axially limited, so that the bearing 130 is prevented from generating position deviation in the rotation process, and the use reliability of the bearing 130 and the high-speed motor 100 is improved.

For example, as shown in fig. 3, a shoulder ring 1322 is disposed on a side of the outer floating ring 132 near the inner floating ring 131, the shoulder ring 1322 is disposed at one end of the outer floating ring 132, and the shoulder ring 1322 is used for limiting the inner floating ring 131.

Specifically, the outer floating ring 132 is provided with a shoulder ring 1322, and the shoulder ring 1322 is disposed at one end of the outer floating ring 132 and is close to the inner floating ring 131. One end of the inner floating ring 131 is axially limited by the shoulder stop ring 1322. Through the arrangement of the shoulder blocking ring 1322, the inner floating ring 131 can realize position fixing through the shoulder blocking ring 1322, so that the inner floating ring 131 is prevented from shifting in position in the rotating process, and the use reliability of the bearing 130 and the high-speed motor 100 is improved.

In one possible embodiment of the present utility model, as shown in fig. 3, the high-speed motor 100 further includes a bearing shield 134, where the bearing shield 134 is disposed on a side of the bearing 130 away from the shoulder ring 1322 for axially limiting the bearing 130.

Specifically, the high speed motor 100 also includes a bearing shield 134. The size of the bearing baffle 134 is matched with that of the bearing 130, the bearing baffle is arranged on one side of the bearing 130 away from the shoulder ring 1322, the bearing baffle is arranged between the bearing 130 and the circlip 133 and sleeved on the periphery of the output shaft 120, the bearing baffle is provided with two bearings 130, and correspondingly, four circlips 133 are arranged. The bearing baffle 134 is provided with a plurality of mounting holes, and correspondingly, the outer floating ring 132 is also provided with a plurality of mounting holes for penetrating bolts. Through the cooperation of bolt and mounting hole, can make bearing baffle 134 and outer floating ring 132 laminating set up as an organic whole structure, and then make bearing baffle 134 form axial spacing to bearing 130.

Through the setting of bearing baffle 134, can cooperate circlip 133 and shoulder collar 1322 to carry out further axial spacing to bearing 130, prevent that bearing 130 from taking place the offset in the rotation in-process, improved the reliability of use of bearing 130 and high-speed motor 100, also make the relation of connection between bearing 130 inseparabler simultaneously.

In one possible implementation of the embodiment of the present utility model, as shown in fig. 1 and 2, the high-speed motor 100 further includes a sealing cover 142, where the sealing cover 142 is sleeved between the end cover 140 and the output shaft 120.

Specifically, the high-speed motor 100 includes two end caps 140, and the two end caps 140 are respectively disposed at the left and right ends of the casing 110 and are sleeved on the outer periphery of the output shaft 120. The end cover 140 is also connected with a sealing cover 142, and the sealing cover 142 is sleeved between the end cover 140 and the output shaft 120. One end cap 140 of the two end caps is matched with a sealing cover 142 to completely seal the output shaft 120, the other end cap 140 and the sealing cover 142 seal the part of the output shaft 120, and the other part of the output shaft 120 passes through the sealing cover 142 to be connected with other equipment.

Through the setting of sealed lid 142, can cooperate end cover 140 and casing 110, provide sealed space and guard action jointly to the part inside casing 110, prolonged the life of each part, also improved the reliability in use of this high-speed motor 100 simultaneously.

In one implementation manner of the embodiment of the present utility model, the high-speed motor 100 further includes a stator 150 and a rotor 160, the rotor 160 is sleeved outside the output shaft 120 and is disposed between the two bearings 130, and the stator 150 is sleeved outside the rotor 160 and is fixedly connected with the casing 110 into an integral structure.

Specifically, as shown in fig. 2, the high-speed motor 100 further includes a rotor 160 and a stator 150. The rotor 160 is sleeved on the periphery of the output shaft 120 and is arranged between the two bearings 130; the stator 150 is sleeved on the periphery of the rotor 160 and is fixedly connected with the casing 110 into an integral structure. The stator 150 is fixed with the housing 110 of the high-speed motor 100, and the rotor 160 rotates.

The stator 150 is composed of coils, a magnetic core and a support structure, while the rotor 160 is composed of permanent magnets or electromagnetic windings, bearings 130 and a support structure. When current is applied to the coils inside the stator 150, a magnetic field is generated around the coils of the stator 150, and due to the existence of the magnetic field, a magnetic field is also generated in the permanent magnet or the electromagnetic winding of the rotor 160, and an acting force is generated between the two magnetic fields, so that the rotor 160 starts to rotate. When the rotor 160 rotates, the output shaft 120 and the bearing 130 can be driven to rotate.

By arranging the stator 150 and the rotor 160, the basic principle of the high-speed motor 100 can be realized, the output shaft 120 and the bearing 130 rotate, and the reliability of the high-speed motor 100 can be improved.

In one implementation of the embodiment of the present utility model, an oil return chamber is further provided on the casing 110, and the oil return chamber is communicated with the bearing 130.

Specifically, the casing 110 is further provided with an oil return cavity (not shown in the figure), the oil return cavity is disposed below the casing 110, and the interior of the oil return cavity is communicated with the location where the bearing 130 is disposed. Oil films are formed between the outer floating ring 132 and the inner floating ring 131 of the bearing 130 and between the inner floating ring 131 and the output shaft 120, and some overflowed oil films can flow into the communicated oil return cavity in the rotation process of the bearing 130 and the output shaft 120 so as to collect and recycle oil.

Through the arrangement of the oil return cavity, the overflowed oil film can be conveniently collected and recycled, so that the working reliability of the high-speed motor 100 is ensured, and meanwhile, the resources can be saved and the cost is reduced.

The above description is only an example of the present utility model and is not intended to limit the scope of the present utility model, and various modifications and variations will be apparent to 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 (10)

1. The high-speed motor is characterized by comprising a shell, an output shaft, two bearings and two end covers; the two bearings are respectively sleeved at the two opposite ends of the output shaft, the two end covers are respectively sleeved on the two bearings, and the two end covers are positioned in the shell and are respectively connected with the shell; the bearing comprises an inner floating ring and at least one outer floating ring; the at least one outer floating ring is sleeved on the periphery of the inner floating ring, and the inner floating ring is sleeved on the periphery of the output shaft; when the output shaft rotates, the output shaft, the inner floating ring and the at least one outer floating ring rotate in sequence, so that a rotating speed difference is formed between every two of the output shaft, the inner floating ring and the at least one outer floating ring.

2. The high-speed motor according to claim 1, wherein the end cover is provided with a through oil inlet passage, and an outlet end of the oil inlet passage faces the bearing.

3. The high-speed motor according to claim 2, wherein the at least one outer floating ring is provided with a first axial oil groove which is communicated with the oil inlet channel, and an oil storage cavity is arranged at one end of the first axial oil groove, which is close to the end cover.

4. A high speed motor as claimed in claim 3, wherein the inner float ring is provided with a second axial oil groove therethrough, the second axial oil groove communicating with the first axial oil groove, the second axial oil groove being provided with an oil storage cavity at one end thereof adjacent to the at least one outer float ring.

5. The high-speed motor according to claim 1, wherein two spaced retainer ring grooves are formed in the end cover corresponding to the bearing, two elastic retainer rings are arranged between the end cover and the output shaft and are inserted in the two retainer ring grooves in a one-to-one correspondence manner, and the two elastic retainer rings are used for mutually matching and axially limiting the bearing.

6. The high-speed motor according to claim 1, wherein a shoulder ring is arranged on one side of the outer floating ring, which is close to the inner floating ring, and the shoulder ring is arranged at one end of the outer floating ring and used for limiting the inner floating ring.

7. The high-speed motor of claim 6, further comprising a bearing shield disposed on a side of the bearing remote from the shoulder ring for axially spacing the bearing.

8. The high speed motor of claim 1, further comprising a seal cover, the seal cover being nested between the end cap and the output shaft.

9. The high-speed motor of claim 1, further comprising a stator and a rotor, wherein the rotor is sleeved outside the output shaft and between the bearings, and the stator is sleeved outside the rotor and fixedly connected with the casing into an integral structure.

10. The high-speed motor of claim 1, wherein the housing is further provided with an oil return chamber, and the oil return chamber is in communication with the bearing.