CN111490626A

CN111490626A - Motor drive shaft, motor

Info

Publication number: CN111490626A
Application number: CN201910083920.7A
Authority: CN
Inventors: 劳春峰; 尹泳; 李昆鹏; 刘增岳; 肖波; 俞国新; 王晶; 宋斌; 朱万朋
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2020-08-04

Abstract

The invention discloses a motor driving shaft, and belongs to the technical field of motors. The motor driving shaft comprises a driving shaft, a driving shaft bushing and a thrust plate, wherein the driving shaft bushing is arranged on the outer sides of two ends of the driving shaft, the driving shaft is fixedly connected with the thrust plate, and the driving shaft bushing and the thrust plate are made of nitrided steel. By adopting the embodiment, the drive shaft bushing and the thrust disk which are made of nitrided steel and subjected to nitriding treatment have the advantages of high surface hardness, good lubricity and good wear resistance, and can prevent the rotation blockage and damage of the drive shaft. The invention also discloses a motor.

Description

Motor drive shaft, motor

Technical Field

The invention relates to the technical field of motors, in particular to a motor driving shaft and a motor.

Background

The gas bearing is applied to the motor more and more widely, when the bearing capacity is larger than the bearing supporting capacity, the driving shaft contacts with the bearing, abrasion is generated during rotation, and the thrust disc directly contacts with the bearing to generate abrasion. In addition, wear may also occur when the drive shaft contacts the bearing and the thrust plate contacts the bearing for a certain period of time during start-up and stop of the compressor. Therefore, the compressor has a problem of failure due to such wear, a rotation blockage of the drive shaft, or a breakage of the bearing.

In the prior art, a coolant is used as a lubricant for supporting the drive shaft, and a vane-type radial and axial bearing, a drive shaft made of a titanium alloy material, and a thrust plate made of a stainless steel material are used. However, the drive shaft and the thrust plate have low lubricity and wear resistance and are easily broken.

Disclosure of Invention

The embodiment of the invention provides a motor driving shaft and a motor. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided a motor drive shaft.

In some optional embodiments, a motor drive shaft comprises a drive shaft, a drive shaft bushing and a thrust plate, the drive shaft bushing is arranged on the outer side of each of two ends of the drive shaft, the drive shaft is fixedly connected with the thrust plate, and the drive shaft bushing and the thrust plate are made of nitrided steel.

By adopting the alternative embodiment, the nitriding treated nitriding steel drive shaft bushing and the thrust disk have the advantages of large surface hardness, good lubricity, good wear resistance and capability of preventing the rotation blockage and the damage of the drive shaft.

Alternatively, the drive shaft bushing is fixed to the drive shaft by a first fixing pin. Adopt this embodiment, through the first fixed pin with the movable fixing of driving shaft bush in the drive shaft, can conveniently change driving shaft bush, the driving shaft bush that will easily abrade is changed and is continued the use, can increase the life of drive shaft, reduce cost.

Optionally, the thrust plate is fixed in position against an end of the drive shaft bushing. With this embodiment, the drive shaft is made to operate more stably by a more compact structure.

Alternatively, the thrust plate is fixed in close proximity to the outer end of the drive shaft sleeve. With this embodiment, securing the thrust plate near the outboard end of the drive shaft bushing may provide sufficient mounting space for the axial bearing.

Optionally, the thrust plate is fixedly connected to one end of the drive shaft bushing. With this embodiment, the thrust plate is fixed with the drive shaft bushing, improving the stability of the thrust plate and the drive shaft bushing.

Optionally, the device further comprises an output shaft, and two ends of the driving shaft are connected with the output shaft. Adopt this embodiment, diameter and structure through the output shaft can process, satisfy different installation user demands.

Optionally, the output shaft is of unitary construction with the drive shaft. With this embodiment, the drive shaft and the output shaft are manufactured by integral molding, ensuring integrity and stability therebetween.

Optionally, the output shaft is inserted into two sides of the driving shaft and fixedly connected through a second fixing pin. Adopt this embodiment, can change the output shaft, the adaptability is stronger.

Optionally, a rotor is arranged in the middle of the driving shaft. With this embodiment, the entire drive shaft can be driven to rotate.

Alternatively, the drive shaft is provided with a thrust plate at each end adjacent to the drive shaft bushing. By adopting the optional embodiment, the stability of the driving shaft can be effectively improved by arranging the thrust discs at the two ends of the driving shaft.

Optionally the thrust disk is integral with the drive shaft bushing. With this alternative embodiment, the stability of the thrust plate and drive shaft bushing may be improved while simplifying the process of removing and installing the thrust plate and drive shaft bushing.

According to a second aspect of embodiments of the present invention, there is provided an electric machine.

In some alternative embodiments, a motor drive shaft of any of the previous alternative embodiments is included.

Adopt this optional embodiment, use nitriding steel's that nitrogenize treatment drive shaft bush and thrust disc, improve surperficial hardness and lubricity to improve the wearability, can prevent that the drive shaft from stifled commentaries on classics and bearing damage, improve the life of motor, make the motor operation more stable.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic structural diagram illustrating an alternative embodiment of a motor drive shaft in accordance with an exemplary embodiment;

FIG. 2 is a schematic structural view of an alternative embodiment of a motor drive shaft bushing secured to the drive shaft according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating an alternate embodiment of the motor drive shaft output shaft being fixed to the drive shaft in accordance with an exemplary embodiment;

fig. 4 is a schematic diagram illustrating an alternative embodiment of a motor according to an exemplary embodiment.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method or device comprising the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

Fig. 1 shows an alternative embodiment of the motor drive shaft.

In this alternative embodiment, a motor drive shaft includes a drive shaft 100, a drive shaft bushing 200 and a thrust disk 300, the drive shaft bushing 200 is disposed on the outer side of each end of the drive shaft 100, the outer side of the drive shaft 100 is fixedly connected to the thrust disk 300, and the drive shaft bushing 200 and the thrust disk 300 are made of nitrided steel.

With this alternative embodiment, the nitrided steel driveshaft liner 200 and thrust plate 300 have the advantages of high surface hardness, good lubricity, good wear resistance, and the ability to prevent stalling and breakage of the driveshaft 100.

Alternatively, the thrust disk 300 is fixed in position against one end of the drive shaft bushing 200. With this embodiment, the drive shaft 100 is made to operate more stably by a more compact structure; for example, the thrust disk 300 is fixed to the left or right end of the drive shaft bushing 20 on the left side; alternatively, the thrust plate 300 is fixed to the left or right end of the drive shaft bushing 20 on the right side.

Alternatively, the thrust disk 300 is fixed in position against the drive shaft bushing 200 near the outer end. With this embodiment, fixing the thrust plate 300 near the outboard end of the drive shaft bushing 200 can provide sufficient mounting space for the axial bearing; for example, the thrust disk 300 is fixed to the left end of the left drive shaft bushing 200, or the thrust disk 300 is fixed to the right end of the right drive shaft bushing 200.

Alternatively, the thrust disk 300 is fixedly coupled to one end of the drive shaft bushing 200. With this embodiment, the thrust disk 300 and the drive shaft bushing 200 are fixed together, improving the stability of the thrust disk 300 and the drive shaft bushing 200; the fixing between the thrust disk 300 and the drive shaft bushing 200 may be in the form of various fixed connections such as welding or pin connection.

Optionally, an output shaft 101 is further included, and both ends of the driving shaft 100 are connected to the output shaft 101. By adopting the embodiment, the diameter and the structure of the output shaft 101 can be processed, and different installation and use requirements can be met.

Optionally, the output shaft 101 is of unitary construction with the drive shaft 100. By adopting the embodiment, the driving shaft 100 and the output shaft 101 are manufactured through integral forming, the integrity and the stability between the driving shaft 100 and the output shaft 101 are ensured, the model of the driving shaft 100 is fixed, and the output shaft 101 which can be matched with different models can meet different use requirements

Optionally, a rotor 102 is provided in the middle of the driving shaft 100. With this embodiment, the rotor 102 may be mounted to rotate the entire drive shaft 100.

Alternatively, one thrust plate 300 is provided at each end of the drive shaft 100 near the drive shaft bushing 200. With this alternative embodiment, the stability of the drive shaft 100 can be effectively improved by providing thrust disks 300 at both ends of the drive shaft 100; two thrust disks remain symmetrical, for example, one thrust disk 300 on the left side of the left drive shaft bushing 200 and one thrust disk 300 on the right side of the right drive shaft bushing 200, or one thrust disk 300 on the right side of the left drive shaft bushing 200 and one thrust disk 300 on the left side of the right drive shaft bushing 200.

Optionally, the thrust disk 300 is integral with the drive shaft bushing 200. With this alternative embodiment, the stability of the thrust disk 300 and the drive shaft bushing 200 may be improved while simplifying the process of removing and installing the thrust disk 300 and the drive shaft bushing 200.

Alternatively, the fastening means between the thrust plate 300 and the driving shaft 100 may be a pin fastening connection, a screw fastening connection, or the like.

Alternatively, nitrided steel refers to a special steel grade designed, smelted, machined specifically for nitrided parts, which is typically represented by 38CrMoAlA steel.

Alternatively, the nitriding treatment refers to a chemical heat treatment process for making nitrogen atoms penetrate into the surface layer of the workpiece in a certain medium at a certain temperature. The product after nitriding treatment has the characteristics of excellent wear resistance, fatigue resistance, corrosion resistance, high temperature resistance and good surface lubricity.

Alternatively, when the thrust disk 300 and the drive shaft bushing 200 are manufactured, the thrust disk 300 and the drive shaft bushing 200 may be manufactured by using a steel nitride material, and then the thrust disk 300 and the drive shaft bushing 200 may be subjected to a nitriding process.

Figure 2 shows an alternative embodiment of the drive shaft bushing fixed to the drive shaft.

In this alternative embodiment, the driveshaft bushing 200 is secured to the driveshaft 100 by a first retaining pin 201. By adopting the embodiment, the driving shaft bushing 200 is movably fixed on the driving shaft 100 through the first fixing pin 201, the driving shaft bushing 200 can be conveniently replaced, the driving shaft bushing 200 which is easy to wear is replaced for continuous use, the service life of the driving shaft 100 can be prolonged, and the cost is reduced.

Optionally, a drive shaft bushing 200 mounting slot is provided on the drive shaft 100. By adopting the embodiment, the installation of the driving shaft bushing 200 is more convenient, and the phenomenon of dislocation installation is prevented.

Fig. 3 shows an alternative embodiment in which the output shaft is fixed to the drive shaft.

In this alternative embodiment, the output shaft 101 is inserted on both sides of the drive shaft 100. Adopt this embodiment, can change the output shaft, the adaptability is stronger.

Alternatively, the output shaft 101 and the driving shaft 100 are fixedly connected by a second fixing pin 103. Adopt this embodiment, can change the output shaft, the adaptability is stronger.

Optionally, both ends of the driving shaft 100 are provided with output shaft connecting slots 104, and second fixing pin inserting slots 105 are provided in the output shaft connecting slots 104 and the output shaft 101. With this embodiment, the output shaft 101 is inserted into the output shaft connecting grooves 104 at both ends of the drive shaft 100, a part of the second fixing pin insertion groove 105 in the output shaft connecting groove 104 is aligned with a part of the second fixing pin insertion groove 105 of the output shaft 101, and then the second fixing pin 103 is entirely inserted into the aligned second fixing pin insertion groove 105, serving to fix the output shaft 101 and the drive shaft 100 together.

Alternatively, the output shaft 101 is inserted into the output shaft connecting groove 104, and the second fixing pin insertion groove 105 is exposed to a greater length than the second fixing pin 103. With this embodiment, the second fixing pin 103 is easily installed, after the output shaft 101 is inserted into the output shaft connecting groove 104, the second fixing pin 103 is put into the second fixing pin insertion groove 105 that is exposed on the output shaft 101, and then the second fixing pin 103 is inserted into the second fixing pin insertion groove 105.

Fig. 4 shows an alternative embodiment of the motor.

This alternative embodiment includes the motor drive shaft of any of the previous alternative embodiments.

By adopting the optional embodiment, the hardness and the lubricity of the surface are improved by using the drive shaft bushing 200 and the thrust disk 300 which are made of nitrided steel and are subjected to nitriding treatment, so that the wear resistance is improved, the stalling of the drive shaft 100 and the damage of a bearing can be prevented, the service life of the motor is prolonged, and the motor runs more stably.

Alternatively, the outer side of the corresponding position of the drive shaft bushing 200 is provided with a radial bearing 400, which may be an air bearing, a magnetic suspension bearing, an oil-lubricated bearing, or the like.

Alternatively, an axial bearing 500 is disposed outside the corresponding position of the thrust disk 300, and the bearing may be an air bearing, a magnetic suspension bearing, an oil-lubricated bearing, or the like.

Optionally, a stator 600 is disposed outside the corresponding position of the rotor 102. The driving shaft 100 is rotated by the mutual force between the rotor 102 and the stator 600.

The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. The utility model provides a motor drive shaft, includes drive shaft, drive shaft bush and thrust disc, the drive shaft both ends outside is equipped with the drive shaft bush, the drive shaft with thrust disc fixed connection, its characterized in that, the drive shaft bush with the material of thrust disc is nitriding steel that the nitriding was handled.

2. The motor drive shaft of claim 1 wherein said drive shaft bushing is secured to the drive shaft by a first retaining pin.

3. The motor drive shaft of claim 1 wherein said thrust plate is secured in position adjacent an end of said drive shaft bushing.

4. A motor drive shaft as defined in claim 3, wherein said thrust plate is secured in close proximity to an outer end of said drive shaft sleeve.

5. The motor drive shaft of claim 3 wherein said thrust plate is fixedly attached to one end of said drive shaft bushing.

6. The motor drive shaft of any one of claims 1 to 5, further comprising an output shaft, both ends of said drive shaft being connected to said output shaft.

7. The motor drive shaft of claim 6 wherein said output shaft is of unitary construction with said drive shaft.

8. The motor drive shaft of claim 6 wherein said output shaft is inserted on both sides of said drive shaft and fixedly attached by a second retaining pin.

9. The motor drive shaft according to any one of claims 1 to 8, wherein a rotor is provided in a middle portion of the drive shaft.

10. An electric motor comprising a motor drive shaft according to any one of claims 1 to 9.