CN213906479U

CN213906479U - Motor hollow shaft

Info

Publication number: CN213906479U
Application number: CN202022576223.6U
Authority: CN
Inventors: 刘霞; 裴正强; 王海斌; 余平
Original assignee: Jing Jin Electric Technologies Beijing Co Ltd
Current assignee: Jing Jin Electric Technologies Beijing Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-06
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses a hollow shaft of a motor, which consists of three sections of an output end, a hollow section and a non-output end; the hollow section is hollow structure, and the hollow section both ends are fixed through following any one or several kinds of modes with output and non-output respectively: snap fit, weld, or threaded connection; the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes which are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled. The utility model provides a motor hollow shaft has reduced the weight of rotor through to rotor shaft hollow structure design, and work power consumption is lower, has reduced the material use amount simultaneously, has reduced manufacturing cost, in addition through the exhaust hole that sets up with hollow structure intercommunication, makes the inside and outside atmospheric pressure of hollow shaft after the assembly unanimous, effectively prevents that the junction from appearing the crack.

Description

Motor hollow shaft

Technical Field

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

Background

In the middle of the motor is used, because the rotor is too heavy, the motor can vibrate, the operation is not stable, the noise is large, the additional resistance moment is large, the normal work of the motor is seriously influenced, and the solid rotor also has the problems of large consumption of materials during manufacturing, large energy consumption during working and the like. However, although the existing rotor shaft is provided with a hollow structure, the internal air pressure and the external air pressure of the hollow structure are inconsistent after the rotor shaft is welded, and the welded part is easy to crack when the motor rotates at a high speed, so that the service life of the motor is influenced.

SUMMERY OF THE UTILITY MODEL

To the above problem, the present invention discloses a hollow shaft for an electric motor to overcome the above problems or at least partially solve the above problems.

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

the utility model discloses a hollow shaft of a motor, which consists of three sections of an output end, a hollow section and a non-output end;

the hollow section is of a hollow structure, and two ends of the hollow section are respectively fixed with the output end and the non-output end in any one or more of the following modes: snap fit, weld, or threaded connection;

the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes, and the exhaust holes are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled.

Furthermore, the exhaust hole is provided with a dustproof plug.

Further, the output end and the non-output end are fixed to the hollow section by laser welding.

Further, the output end and the non-output end are interference-fitted with the hollow section before welding.

Furthermore, the output end is provided with a spline for ensuring the coaxiality of the output end and the connecting shaft.

Furthermore, the diameter of the hollow section is larger than the diameters of the output end and the non-output end, and rabbets are arranged at the joints of the two ends of the hollow section and the output end and the non-output end for realizing the centering and the positioning of the connection.

Further, the output end and/or the non-output end is/are provided with a hollow groove communicated with the hollow structure relative to the side of the hollow section.

Further, the shape of the hollow groove is any one or combination of the following: cylinder, truncated cone and cone.

Further, the hollow groove is obtained by swaging and/or drilling.

Furthermore, a plurality of iron core key grooves are formed in the hollow section, and the iron core key grooves penetrate through the whole hollow section.

The utility model has the advantages and beneficial effects that:

the utility model provides a motor hollow shaft has reduced the weight of rotor through to rotor shaft hollow structure design, and work power consumption is lower, has reduced the material use amount simultaneously, has reduced manufacturing cost, in addition through the exhaust hole that sets up with hollow structure intercommunication, makes the inside and outside atmospheric pressure of hollow shaft after the assembly unanimous, prevents that the junction from appearing the crack.

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 a front view of a hollow shaft of a motor according to an embodiment of the present invention;

fig. 2 is an axial sectional view of a hollow shaft of a motor according to an embodiment of the present invention.

In the figure: 1. output, 2, hollow section, 3, non-output, 4, dustproof end cap, 5, spline, 6, hollow groove, 7, iron core keyway.

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.

An embodiment of the utility model discloses a hollow shaft of motor, as shown in fig. 1, this the hollow shaft comprises output 1,

hollow section

2 and 3 three-sections of non-output.

The hollow section 2 is of a hollow structure, and two ends of the hollow section 2 are respectively fixed with the output end 1 and the non-output end 3 in any one or more of the following ways: snap-fit, welded or screwed connections, but may of course also be fixed by other connection means, for example by screwing or riveting.

The output end 1 and/or the hollow section 2 and/or the non-output end 3 are/is provided with a plurality of exhaust holes, the exhaust holes are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after assembly, and the exhaust holes are uniformly arranged around the axial lead of the motor shaft to meet the dynamic balance of the hollow shaft.

To sum up, the motor hollow shaft that this embodiment provided has reduced the weight of rotor through to rotor shaft hollow structure design, and work power consumption is lower, has reduced the material use amount simultaneously, has reduced manufacturing cost, in addition through setting up the exhaust hole with hollow structure intercommunication, makes the hollow shaft inside and outside atmospheric pressure unanimous after the assembly, prevents that the junction from appearing the crack, has prolonged the life-span of rotor shaft.

In one embodiment, as shown in fig. 2, in order to prevent the vent holes from being exposed, particles enter the hollow structure of the rotor shaft, and prevent the vent holes from generating whistling sound due to high-speed rotation of the rotor shaft, dust plugs 4 are arranged on the vent holes to plug the vent holes, and the plugging mode can be that the vent holes are plugged through bolts or screws.

In one embodiment, the output end 1 and the non-output end 3 are fixed to the hollow section 2 by laser welding, but may be fixed by other welding methods.

In one embodiment, the output 1 and the non-output 3 are interference fitted with the hollow section 2 before welding. And the output end 1, the non-output end 3 and the hollow section 2 are assembled in a cold pressing or heating mode by using an oil press, and welding is carried out after the assembly is finished.

In one embodiment, as shown in fig. 1, the output end 1 is provided with a spline 5 for ensuring the coaxiality of the output end 1 and the connecting shaft, so that vibration and noise in the transmission process are effectively reduced, and the transmission efficiency is improved.

In one embodiment, the diameter of the hollow section 2 is larger than the diameters of the output end 1 and the non-output end 3, and the joints between the two ends of the hollow section 2 and the output end 1 and the non-output end 3 are provided with rabbets for realizing the centering and positioning of the connection. Of course, the output end 1 and the non-output end 3 may be provided with corresponding spigots, so that the axial lines of the hollow section 2, the output end 1 and the non-output end 3 are on the same straight line.

In one embodiment, the output end 1 and/or the non-output end 3 is provided with a hollow groove 6 communicated with the hollow structure at the side opposite to the hollow section 2, so that the mass of the hollow shaft is reduced, and the manufacturing cost is saved.

In one embodiment, the shape of the hollow groove 6 is any one or combination of the following: cylinder, truncated cone and cone. As shown in fig. 2, the hollow groove 6 has a shape of a combination of a cylinder, a truncated cone and a cone. The shape of the hollow groove 6 can be a combination of other shapes, not only limited to a cylinder, a truncated cone and a cone, but also the hollow groove 6 can be other single shapes.

In one embodiment, the hollow groove 6 is obtained by swaging and/or drilling. The hollow grooves 6 on the output end 1 and the non-output end 3 can be machined by swaging and drilling respectively, or by one of swaging and drilling.

In one embodiment, as shown in fig. 1, a plurality of core key slots 7 are provided on the hollow section 2, the number and the shape of the core key slots 7 may be set as required, the core key slots 7 penetrate through the whole hollow section 2, and the rotor core is assembled and fixed on the hollow shaft through the core key slots 7.

To sum up, the utility model discloses a hollow shaft of a motor, which consists of three sections of an output end, a hollow section and a non-output end; the hollow section is hollow structure, and the hollow section both ends are fixed through following any one or several kinds of modes with output and non-output respectively: snap fit, weld, or threaded connection; the output end and/or the hollow section and/or the non-output end are/is provided with a plurality of exhaust holes which are communicated with the hollow structure, so that the internal and external air pressures of the hollow shaft are consistent after the hollow shaft is assembled. The utility model provides a motor hollow shaft has reduced the weight of rotor through to rotor shaft hollow structure design, and work power consumption is lower, has reduced the material use amount simultaneously, has reduced manufacturing cost, in addition through setting up the exhaust hole with hollow structure intercommunication, makes the inside and outside atmospheric pressure of hollow shaft after the assembly unanimous, prevents that the junction from appearing the crack, has prolonged the life-span of rotor shaft.

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

1. A hollow shaft of a motor is characterized in that the hollow shaft consists of three sections, namely an output end, a hollow section and a non-output end;

2. The hollow motor shaft according to claim 1, wherein the exhaust hole is provided with a dust plug.

3. The hollow motor shaft of claim 1, wherein said output end and said non-output end are secured to said hollow section by laser welding.

4. The motor hollow shaft of claim 3 wherein the output end and the non-output end are interference fitted with the hollow section prior to welding.

5. The hollow motor shaft of claim 1, wherein the output end is provided with splines for ensuring the coaxiality of the output end with the connecting shaft.

6. The hollow motor shaft according to claim 1, wherein the diameter of the hollow section is larger than the diameters of the output end and the non-output end, and the joints between the two ends of the hollow section and the output end and the non-output end are provided with spigots for centering and positioning the connection.

7. The hollow motor shaft according to claim 1, wherein the output end and/or the non-output end are provided with a hollow groove opposite to the hollow section side, which hollow groove communicates with the hollow structure.

8. The hollow motor shaft according to claim 7, wherein the shape of the hollow groove is any one or a combination of the following: cylinder, truncated cone and cone.

9. Hollow motor shaft according to claim 7, characterized in that the hollow groove is produced by swaging and/or drilling.

10. An electric motor hollow shaft according to any one of claims 1-9, wherein a plurality of core keyways are provided on said hollow section, said core keyways extending through the entire hollow section.