Permanent magnet motor stator and rotor assembling tool and system

Abstract

The utility model discloses a permanent magnet motor stator and rotor assembling tool and system which are simple in structure, convenient to operate, short in manufacturing period, capable of guaranteeing assembling quality, high in practicability and suitable for the stage of manual assembling in the initial development stage of a sample piece. The tool comprises a base, wherein a fixing hole used for fixing a shell is formed in the base; the cushion block is fixed on the base; one end of the guide shaft is fixed on the cushion block; and the shaft bushing is used for being connected to the guide shaft in a sleeving manner so as to realize rotor assembling and guiding together with the guide shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of stator-rotor assembly, in particular to a permanent magnet motor stator-rotor assembly tool and system. Background Art

[0002] During the stator and rotor assembly process of the permanent magnet motor, due to the embedded permanent magnets in the rotor, magnetic pulling force will be generated with the stator core and attract each other during assembly. In this regard, when assembling the stator and rotor, assembly tools are generally used to assist in installation. The existing assembly devices have complex structures, such as the "motor stator and rotor pressing assembly mechanism" with application number CN202110548914.1 and the "motor stator and rotor assembly equipment" with application number CN201711149212.6. They are all dedicated permanent magnet motor stator and rotor assembly equipment, which require special designs for different motor models, and have problems such as long procurement cycle, high cost, and inflexible assembly. It is not applicable in the initial development stage of the sample, when manual assembly is used. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a permanent magnet motor stator and rotor assembly tooling and system, which has a simple structure, convenient operation, short production cycle, can ensure assembly quality, has strong practicality, and is suitable for the stage of manual assembly in the initial development stage of samples.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The first aspect of the utility model provides a permanent magnet motor stator and rotor assembly tool, comprising:

[0006] A base, wherein the base is provided with a fixing hole for fixing the shell;

[0007] A cushion block, the cushion block being fixed on the base;

[0008] A guide shaft, one end of which is fixed on the cushion block;

[0009] A shaft bushing is used for sleeve-engaging on the guide shaft to realize rotor assembly and guidance together with the guide shaft.

[0010] The second aspect of the utility model provides a permanent magnet motor stator and rotor assembly system, comprising a stator part and a rotor part, wherein the stator part comprises a housing and a stator fixed in the housing by bolts, and the rotor part comprises a hollow shaft and a rotor disposed outside the hollow shaft.

[0011] It also includes a permanent magnet motor stator and rotor assembly tool as described in the first aspect, wherein both ends of the guide shaft extend out of both ends of the stator, and both ends of the shaft bushing extend out of both ends of the rotor.

[0012] The utility model has the following advantages:

[0013] The tooling has a simple structure, is easy to operate, has a short production cycle, can ensure assembly quality, is highly practical, and is suitable for manual assembly in the initial development stage of a sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the stator and rotor assembly system of the permanent magnet motor of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the shaft bushing. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model provides a permanent magnet motor stator and rotor assembly tool and system, the system includes a permanent magnet motor stator and rotor assembly tool and a corresponding permanent magnet motor to be assembled. The permanent magnet motor to be assembled includes a stator part and a rotor part. Figure 1 As shown, the stator part includes a housing 21 and a stator 22 fixed in the housing 21 by bolts 23. The rotor part includes a hollow shaft 25 and a rotor 24 placed outside the hollow shaft 25. Before assembly, the components of the stator part and the rotor part have been assembled into a whole. The permanent magnet motor stator and rotor assembly tool is used in the assembly process of the stator part and the rotor part of the permanent magnet motor.

[0024] Specifically, the permanent magnet motor stator and rotor assembly tooling includes a base 11, a cushion block 12, a guide shaft 13 and a shaft bushing 14. The base 11 is provided with a fixing hole for fixing the housing 21; the cushion block 12 is fixed on the base 11; one end of the guide shaft 13 is fixed on the cushion block 12; the shaft bushing 14 is used to be sleeved on the guide shaft 13 to achieve rotor assembly guidance together with the guide shaft 13.

[0025] With the above structure, the length of the guide shaft 13 is greater than the length of the corresponding stator 22 to be assembled, so that both ends of the guide shaft 13 extend out of the two ends of the stator 22; the length of the shaft bushing 14 is greater than the length of the corresponding rotor 24 to be assembled, so that both ends of the shaft bushing 14 extend out of the two ends of the rotor 24. When assembled, the moment when the shaft bushing and the guide shaft 13 are sleeved is earlier than the moment when the rotor and the stator are connected.

[0026] With the above structure, before assembly, the shaft bushing 14 is first inserted into the hollow shaft 25 of the rotor part. In the assembly process, the shaft bushing 14 and the rotor part are moved down together and sleeved on the guide shaft 13, as shown in FIG. Figure 1 As shown, at this time, the rotor 24 and the stator 22 are in a separated state. The rotor part is further moved downward, and under the action of the guide shaft 13 and the shaft bushing 14, the rotor part can be guided for assembly to ensure the assembly quality. After the assembly is completed, the shaft bushing 14 is removed. The tooling has a simple structure, convenient operation, short production cycle, can ensure assembly quality, and is highly practical. It is suitable for the manual assembly stage in the initial development stage of the sample.

[0027] On the basis of the above structure, in order to facilitate the removal of the shaft bushing 14, a limiting structure 141 is provided on the outer diameter surface of one end of the shaft bushing 14. The limiting structure 141 is provided to prevent the shaft bushing 14 from being completely embedded in the hollow shaft 25 during the assembly and pressurization process, which makes it difficult to remove.

[0028] The limiting structure 141 can be a limiting ring structure or a limiting protrusion structure. The outer diameter of the limiting structure 141 is larger than the outer diameter of the end of the hollow shaft 25. In order to further facilitate the removal of the shaft bushing 14, as shown in FIG. Figure 2 As shown, a limiting ring structure is preferred. At this time, a bolt hole 142 can be further processed at the end of the shaft bushing 14, and a pull-out bolt 15 is installed in the bolt hole 142. When removing the shaft bushing 14, the pull-out bolt 15 can be directly pulled out, which is simple to operate.

[0029] On the basis of the above structure, in order to improve the stability of the extraction bolt, there are at least two bolt holes 142 and they are evenly distributed on the end surface of the shaft bushing 14. For example, Figure 1 As shown, an example in which two bolt holes 142 are provided is given.

[0030] In order to improve the applicability of the tooling, multiple sets of fixing holes are provided on the base 11. By providing multiple sets of fixing holes, it is possible to adapt to the assembly of motors of different models.

[0031] Exemplarily, the base 11 may be made of nylon material, which has the advantages of good wear resistance, light weight, and easy handling.

[0032] The spacer 12 supports the inner ring of the motor roller bearing to prevent the bearing from being damaged by the rotation of the bearing when the rotor is assembled. The spacer 12 can be made of non-magnetic stainless steel material.

[0033] The shaft diameter at the bottom of the guide shaft 13 is interference fit with the mounting inner hole on the base 11, and the shaft extension end diameter is small clearance fit with the rotor shaft inner spline, and the single-side clearance design value is less than 0.2mm, ensuring that it plays an accurate guiding role when the stator and rotor are assembled, thereby ensuring the assembly quality. The guide shaft 13 can be made of non-magnetic stainless steel.

[0034] The single-side clearance between the inner diameter of the shaft bushing 14 and the guide shaft 13 is controlled within 0.2 mm, and the single-side clearance between the outer diameter of the shaft bushing and the inner diameter of the rotor shaft is controlled within 0.3 mm. The shaft bushing 14 can be made of non-magnetic stainless steel material.

[0035] With the above structure, when assembling manually, first insert the shaft bushing 14 into the hollow shaft 25 of the rotor part and assemble it downwards together with the rotor part. After confirming that the shaft bushing is sleeved on a part of the guide shaft 13, the rotor and the stator begin to overlap on the radial surface. After the rotor is pressed into place, screw in the extraction bolt 15 and pull out the shaft bushing.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permanent magnet motor stator and rotor assembly tool, characterized in that: include: A base (11), wherein the base (11) is provided with a fixing hole for fixing the housing (21); A cushion block (12), wherein the cushion block (12) is fixed on the base (11); A guide shaft (13), one end of the guide shaft (13) being fixed on the cushion block (12); A shaft bushing (14), wherein the shaft bushing (14) is used to be sleeved on the guide shaft (13) so as to achieve rotor assembly guidance together with the guide shaft (13).

2. A permanent magnet motor stator and rotor assembly tool according to claim 1, characterized in that: A limiting structure (141) is provided on the outer diameter surface of one end of the shaft bushing (14).

3. A permanent magnet motor stator and rotor assembly tool according to claim 2, characterized in that: The limiting structure (141) is a limiting ring.

4. The permanent magnet motor stator and rotor assembly tool according to claim 2, characterized in that: A bolt hole (142) is provided at one end of the shaft bushing (14), and a pull-out bolt (15) is installed in the bolt hole (142).

5. The permanent magnet motor stator and rotor assembly tool according to claim 4, characterized in that: There are at least two bolt holes (142) which are evenly distributed on the end surface of the shaft bushing (14).

6. The permanent magnet motor stator and rotor assembly tool according to claim 1, characterized in that: The base (11) is provided with a plurality of sets of fixing holes.

7. A permanent magnet motor stator-rotor assembly system, comprising a stator part and a rotor part, wherein the stator part comprises a housing (21) and a stator (22) fixed in the housing (21) by bolts (23), and the rotor part comprises a hollow shaft (25) and a rotor (24) disposed outside the hollow shaft (25), characterized in that: It also includes a permanent magnet motor stator and rotor assembly tool as claimed in any one of claims 1 to 6, wherein both ends of the guide shaft (13) extend out of both ends of the stator (22), and both ends of the shaft bushing (14) extend out of both ends of the rotor (24).

8. A permanent magnet motor stator and rotor assembly system according to claim 7, characterized in that: The outer diameter of the limiting structure (141) is greater than the outer diameter of the end of the hollow shaft (25).

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