Dismounting tool for bearingless motor rotor

Abstract

The utility model discloses a dismounting tool for a bearingless motor rotor, and relates to the technical field of motors. The tool comprises a base, an annular groove is formed in the top of the base, kidney-shaped through holes are formed in the bottom of the annular groove, four sets of kidney-shaped through holes are formed in the bottom of the annular groove, and the widths of the four sets of kidney-shaped through holes are sequentially increased in the anticlockwise direction. According to the utility model, the four groups of waist-shaped through holes with different widths are arranged, bolts with adaptive diameters can be selected according to actual requirements, the bolts penetrate through the waist-shaped through holes and then are screwed into the process thread slotted holes on the rotor of the permanent magnet motor, the applicability is stronger, and the nut seat is detachably fixed on the base by adopting screws, so that the installation is more convenient. The screw rod with the proper diameter can be selected according to the shaft diameter of the main shaft connected with the rotor, and the nut seat matched with the screw rod is fixed on the base, so that the situation that the screw rod is broken due to overlarge stress caused by overlarge difference between the shaft diameter of the main shaft and the diameter of the screw rod can be prevented, and the screw rod can be better protected.

Description

Technical Field

[0001] This utility model belongs to the field of electric motor technology, and in particular relates to a disassembly tool for a bearingless motor rotor. Background Technology

[0002] With the rapid development of rare earth permanent magnet technology in recent years, various bearingless permanent magnet synchronous motors have emerged on the market. Their characteristics include: the motor itself has no bearings; the rotor of the permanent magnet motor is directly connected to the main shaft of a screw compressor, reducer, or high-pressure reciprocating pump; and the motor housing is directly connected to the housing of the screw compressor, reducer, or high-pressure reciprocating pump. This significantly reduces the motor size, improves system efficiency, lowers the failure rate, and eliminates the need for bearing maintenance. However, because this structure differs from general-purpose structures, common tooling cannot solve the problem during disassembly. A search revealed patent application number 201820792831.0, which discloses a disassembly tool for a bearingless motor rotor. This tool includes a circular base with a threaded hole at its center. Two handles are fixedly mounted on the circumference of the base, symmetrically arranged. Two U-shaped through holes are also symmetrically arranged on the circumference of the base. The disassembly tool also includes a screw adapted to the threaded hole.

[0003] However, during actual use, the applicant found that the diameter of the screw used to abut against the motor spindle on the tooling was unique. This meant that when the diameter of the spindle connected to the rotor to be disassembled differed significantly from the diameter of the screw, the screw was prone to breakage due to excessive force. Therefore, we propose a bearingless motor rotor disassembly tooling. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model is a disassembly fixture for a bearingless motor rotor, including a base. The top of the base has an annular groove, and the bottom of the annular groove has a waist-shaped through hole. There are four sets of waist-shaped through holes at the bottom of the annular groove, and the width of the four sets of waist-shaped through holes increases sequentially in a counterclockwise direction. A nut seat is fixedly connected to the center of the top of the base by a screw. A screw adapted to the nut seat is threaded into the middle of the nut seat. Handles are symmetrically fixedly connected to both sides of the base, and anti-slip sleeves are fitted and fixed to the grips of the handles.

[0006] Preferably, a placement groove is provided at the center of the top of the base, and positioning grooves are provided in a ring array on the peripheral sidewall of the placement groove.

[0007] Preferably, the nut seat is clamped in the placement slot, and the limiting protrusions in annular array are arranged on the circumferential side wall of the nut seat and matched with the limiting grooves.

[0008] Preferably, a middle through hole is arranged on the base below the placement slot, and the lower end of the screw rod passes through the middle through hole.

[0009] Preferably, a stepped hole is arranged on the bottom of the base, and four stepped holes are arranged in annular array around the middle through hole.

[0010] Preferably, the upper end of the screw rod penetrates the stepped hole and is screwed into the threaded hole arranged on the bottom of the nut seat, and the lower end of the screw rod is embedded in the stepped hole.

[0011] The utility model has the following beneficial effects:

[0012] The utility model discloses a dismounting tool for bearingless motor rotor, through four groups of different width's waist type through -hole, can according to actual demand, select the bolt of adaptation diameter, and after the bolt passes waist type through -hole, screw and enter the process screw thread groove hole on permanent magnet motor rotor, applicability is stronger, through the nut seat of adopting screw detachable fixed on the base, can according to the shaft diameter of the main shaft connected with rotor selects the screw rod of appropriate diameter, and the nut seat of adaptation with screw rod is fixed on the base, thereby can prevent the shaft diameter of the main shaft and the diameter of the screw rod, cause the screw rod to be too big and break, can better protect the screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduces, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0014] Figure 1 It is a top view structural schematic diagram of the dismounting tool for bearingless motor rotor of the utility model;

[0015] Figure 2 It is a bottom view structural schematic diagram of the dismounting tool for bearingless motor rotor of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the dismounting tool for bearingless motor rotor of the utility model after taking out the nut seat;

[0017] Figure 4 It is a structural schematic diagram of the nut seat in the dismounting tool for bearingless motor rotor of the utility model.

[0018] The components represented by the reference numbers in the drawings are listed as follows:

[0019] 1, base; 11, annular groove; 12, waist-shaped through hole; 13, middle through hole; 14, stepped hole; 15, placing groove; 16, limiting groove; 2, nut seat; 21, limiting protrusion; 22, threaded hole; 3, screw rod; 4, handle; 41, anti-skid sleeve; 5, screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figures 1-4 The technical scheme provided by the present application is as follows:

[0022] A bearingless motor rotor dismounting tool, comprising a base 1, an annular groove 11 is formed in the top of the base 1, a waist-shaped through hole 12 is formed in the bottom of the annular groove 11, four groups of waist-shaped through holes 12 are formed in the bottom of the annular groove 11, the widths of the four groups of waist-shaped through holes 12 increase in turn in the counterclockwise direction, by forming the four groups of waist-shaped through holes 12 with different widths, bolts with diameters suitable for actual requirements can be selected, and the bolts are screwed into the process thread groove holes on the permanent magnet motor rotor after passing through the waist-shaped through holes 12, so that the adaptability is stronger, when the base 1 is fixedly connected with the rotor, bolts with diameters suitable for the sizes of the process thread groove holes on the permanent magnet motor rotor can be selected, and the two bolts are screwed into the process thread groove holes on the rotor after passing through a group of waist-shaped through holes 12 suitable for the bolts, so that the base 1 is fixed on the rotor.

[0023] The nut seat 2 is fixedly connected at the center of the top of the base 1 by a screw 5, a placement groove 15 is formed at the center of the top of the base 1, a limiting groove 16 is formed in an annular array on the circumferential side wall of the placement groove 15, the nut seat 2 is clamped in the placement groove 15, limiting protrusions 21 that cooperate with the limiting grooves 16 are arranged in an annular array on the circumferential side wall of the nut seat 2, an intermediate through hole 13 is formed in the base 1 below the placement groove 15, a screw rod 3 that is adapted to the nut seat 2 is threadedly connected to the middle of the nut seat 2, the lower end of the screw rod 3 passes through the intermediate through hole 13, a stepped hole 14 is formed in the bottom of the base 1, four stepped holes 14 are formed in an annular array around the intermediate through hole 13, the upper end of the screw 5 penetrates the stepped hole 14 and is threadedly screwed into a threaded hole 22 formed in the bottom of the nut seat 2, the nut seat 2 is detachably fixed to the base 1 by the screw 5, the appropriate diameter screw rod 3 can be selected according to the shaft diameter of the main shaft connected to the rotor, and the nut seat 2 that is adapted to the screw rod 3 is fixed to the base 1, so that the shaft diameter of the main shaft and the diameter of the screw rod 3 are not too different, the screw rod 3 is not broken due to excessive stress, the screw rod 3 is better protected, the lower end of the screw 5 is embedded in the stepped hole 14, handles 4 are fixedly connected to the two sides of the base 1, a non-slip sleeve 41 is sleeved and fixed to the handle of the handle 4, before the base 1 is fixed to the rotor, the screw rod 3 with a diameter slightly smaller than the shaft diameter of the main shaft connected to the rotor can be selected according to the shaft diameter of the main shaft, and the screw rod 3 is fixed to the base 1 together with the nut seat 2 that is adapted to the screw rod 3 by the screw 5, after being fixed, the base 1 is fixed to the rotor, and the screw 5 is rotated to make one end of the screw 5 abut against the main shaft, the screw rod 3 is slowly rotated while the handles 4 on both sides are fixed, and the motor rotor can be easily disassembled.

[0024] Working principle: when in use, the screw rod 3 with a diameter slightly smaller than the shaft diameter of the main shaft connected to the rotor can be selected according to the shaft diameter of the main shaft, and the screw rod 3 is fixed to the base 1 together with the nut seat 2 that is adapted to the screw rod 3 by the screw 5, after being fixed, the base 1 is fixed to the rotor, when the base 1 is fixedly connected to the rotor, the screw bolts with an appropriate diameter can be selected according to the size of the process thread groove hole on the permanent magnet motor rotor, and the two screw bolts are threadedly screwed into the process thread groove hole on the rotor after penetrating a group of waist-shaped through holes 12 that are adapted, the base 1 is fixed to the rotor, then the screw 5 is rotated to make one end of the screw 5 abut against the main shaft, the screw rod 3 is slowly rotated while the handles 4 on both sides are fixed, and the motor rotor can be easily disassembled.

[0025] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] The above is only the preferred embodiment of the utility model, and does not limit the utility model, any modification to the technical scheme recorded in the foregoing embodiments, equivalent replacement to part of the technical features, all belong to the protection scope of the utility model.

Claims

1. A tool for dismounting a bearingless electric machine rotor, comprising a base (1), characterized in that: The top of the base (1) is provided with an annular groove (11), the bottom of the annular groove (11) is provided with a waist-shaped through hole (12), the waist-shaped through hole (12) at the bottom of the annular groove (11) is provided with four groups, the width of the four groups of waist-shaped through holes (12) increases in anticlockwise direction, the center position of the top of the base (1) is fixedly connected with a nut seat (2) through a screw (5), the middle of the nut seat (2) is threadedly connected with a screw rod (3) matched with the nut seat (2), the both sides of the base (1) are fixedly connected with handles (4), the grips of the handles (4) are sleeved with anti-skid sleeves (41).

2. A dismounting tool for a bearingless motor rotor according to claim 1, characterized in that, The center position of the top of the base (1) is provided with a placing groove (15), and the circumferential wall of the placing groove (15) is provided with a limiting groove (16) in an annular array.

3. A dismounting tool for a bearingless motor rotor according to claim 2, characterized in that, The nut seat (2) is clamped in the placing groove (15), and the circumferential wall of the nut seat (2) is provided with a limiting protrusion (21) in an annular array matched with the limiting groove (16).

4. The dismounting tool of a bearingless motor rotor according to claim 2, characterized in that, The base (1) below the placing groove (15) is provided with an intermediate through hole (13), and the lower end of the screw rod (3) penetrates the intermediate through hole (13).

5. A dismounting tool for a bearingless motor rotor according to claim 4, characterized in that, The bottom of the base (1) is provided with a stepped hole (14), and the stepped hole (14) is provided with four annular arrays around the intermediate through hole (13).

6. A dismounting tool for a bearingless motor rotor according to claim 5, characterized in that, The upper end of the screw (5) penetrates the stepped hole (14) and is threadedly screwed into the threaded hole (22) at the bottom of the nut seat (2), and the lower end of the screw (5) is embedded in the stepped hole (14).

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