Permanent magnet synchronous motor rotor concentric press-fitting device

Abstract

The utility model relates to the field of rotor press fitting, and discloses a permanent magnet synchronous motor rotor concentric press fitting device which comprises a base, the top of the base is fixedly connected with a protection box, and a transmission device is arranged in the protection box. The outer side of the transmission device is rotationally connected with four connecting plates through hinge supports, the four connecting plates are all slidably connected with the interior of the protection box, the inner sides of the four connecting plates are all fixedly connected with fixing plates, and the tops of the four connecting plates are all provided with limiting devices. Buttons located in the four limiting devices correspondingly are arranged at the tops of the four connecting plates correspondingly, an L-shaped supporting plate is fixedly connected to the top of the base, an electric push rod is fixedly connected to the bottom of the L-shaped supporting plate, and a mounting plate is fixedly connected to the bottom of the electric push rod. The permanent magnet synchronous motor rotor concentric press-fitting device has the advantages that the stator can be fixed, and the installation positions of the rotor and the stator are prevented from deviating.

Description

Technical Field

[0001] The utility model relates to the field of rotor press-fitting, in particular to a permanent magnet synchronous motor rotor concentric press-fitting device. Background Art

[0002] Permanent magnet synchronous motor refers to a synchronous motor that generates a synchronous rotating magnetic field by permanent magnet excitation. AC permanent magnet synchronous motor is a low-carbon motor in today's society due to its small size, light weight, high efficiency and energy saving. Permanent magnet synchronous motor has attracted more and more attention. Due to the increasingly mature operation characteristics of synchronous motors and their control technology, small and medium power DC motors and asynchronous motors are gradually being replaced by permanent magnet synchronous motor speed control systems.

[0003] In the production process of permanent magnet synchronous motor, the stator and the rotor need to be pressed together after they are produced separately. When holding the rotor to connect the stator, the strong magnetic attraction of the magnet will cause the human hand to shift or the stator to lose its fixation. The fixed position of the stator and the rotor after the shift will change, causing the rotor and the stator to be non-concentric, which makes it easy to damage the stator and the rotor during assembly. Therefore, a permanent magnet synchronous motor rotor concentric press-fitting device is proposed to solve the above problem. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a permanent magnet synchronous motor rotor concentric press-fitting device, which has the advantage of being able to fix the stator and prevent the installation positions of the rotor and the stator from being offset, and solves the problem that in the production process of the permanent magnet synchronous motor, the stator and the rotor need to be press-fitted together after they are produced separately, and when the rotor is held by hand to connect with the stator, the strong magnetic attraction of the magnet will cause the human hand to be offset, or the stator to lose its fixation, and the fixed position of the stator and the rotor after the offset will change, causing the rotor and the stator to be non-concentric, resulting in the problem that the stator and the rotor are easily damaged during assembly.

[0006] (II) Technical solution

[0007] The utility model provides a technical solution to the above-mentioned technical problems as follows: a permanent magnet synchronous motor rotor concentric press-fitting device, comprising a base, a protective box fixedly connected to the top of the base, a transmission device arranged inside the protective box, four connecting plates rotatably connected to the inside of the protective box by a hinge support on the outside of the transmission device, a fixing plate fixedly connected to the inner sides of the four connecting plates, a limiting device arranged on the top of the four connecting plates, buttons respectively located inside the four limiting devices arranged on the top of the four connecting plates, an L-shaped support plate fixedly connected to the bottom of the L-shaped support plate, an electric push rod fixedly connected to the bottom of the electric push rod, a mounting plate fixedly connected to the bottom of the mounting plate, a rotor fixing module fixedly connected to the bottom of the mounting plate, and four limiting rods corresponding to the four buttons respectively fixedly connected to the bottom of the mounting plate.

[0008] The beneficial effects of the utility model are:

[0009] The permanent magnet synchronous motor rotor concentric press-fitting device has the advantage of being able to fix the stator and prevent the installation positions of the rotor and the stator from being offset.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the transmission device includes a motor fixedly connected to the interior of the protective box, the outer side of the output shaft of the motor is fixedly connected to a threaded rod rotatably connected to the interior of the protective box, and the outer side of the threaded rod is connected to a transmission block rotatably connected to the four connecting plates through a hinge support through a threaded transmission.

[0012] The beneficial effect of adopting the above further solution is that the transmission block can be moved up and down, thereby controlling the opening and closing of the four fixed plates.

[0013] Furthermore, eight slide grooves are provided inside the protection box, and two slide plates are fixedly connected to the outer sides of the four connecting plates and are respectively slidably connected to the eight slide grooves.

[0014] The beneficial effect of adopting the above further solution is that the moving direction of the fixing plate is limited, thereby preventing the fixing plate from shifting during movement.

[0015] Furthermore, the four fixing plates are symmetrically distributed front to back and left to right, the interiors of the four fixing plates are all configured to be arc-shaped, and the interiors of the four fixing plates are all fixedly connected with friction pads.

[0016] The beneficial effect of adopting the above further solution is that the friction between the fixing plate and the stator is increased, so that the fixation of the stator is more stable.

[0017] Furthermore, a single limiting device includes a spring fixedly connected to the top of a single connecting plate, a damping plate is fixedly connected to the top of the spring, and a pipe sleeve penetrating through and extending to the inside of the spring is fixedly connected to the inside of the damping plate.

[0018] The beneficial effect of adopting the above further solution is that the downward pressing position of the limit rod is limited, so that the docking of the stator and the rotor is more stable.

[0019] Furthermore, the top of the tube sleeve is open, the inner diameter of the tube sleeve is consistent with the outer diameter of the limiting rod, and the tube sleeve is located directly above the button.

[0020] The beneficial effect of adopting the above further solution is that it is possible to detect the degree of completion of the docking between the stator and the rotor, making it more intuitive to judge the docking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front cross-sectional schematic diagram of the utility model;

[0022] Figure 2 This is a top view schematic diagram of the protective box of the utility model;

[0023] Figure 3 This is an enlarged schematic diagram of point A of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the connecting plate of the utility model.

[0025] In the figure: 1. base; 2. protective box; 3. transmission device; 31. motor; 32. threaded rod; 33. transmission block; 4. connecting plate; 5. fixing plate; 6. limit device; 61. spring; 62. damping plate; 63. pipe sleeve; 7. button; 8. L-shaped support plate; 9. electric push rod; 10. mounting plate; 11. rotor fixing module; 12. limit rod; 13. slide plate; 14. friction pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the embodiment, Figure 1-4A permanent magnet synchronous motor rotor concentric pressing device is provided. The utility model includes a base 1, a protective box 2 is fixedly connected to the top of the base 1, a transmission device 3 is arranged inside the protective box 2, four connecting plates 4 are rotatably connected to the outside of the transmission device 3 through a hinge support and are all slidably connected to the inside of the protective box 2, a fixing plate 5 is fixedly connected to the inner sides of the four connecting plates 4, a limiting device 6 is arranged on the top of the four connecting plates 4, buttons 7 are respectively arranged in the four limiting devices 6 are arranged on the top of the four connecting plates 4, an L-shaped supporting plate 8 is fixedly connected to the top of the L-shaped supporting plate 8, an electric push rod 9 is fixedly connected to the bottom of the electric push rod 9, a mounting plate 10 is fixedly connected to the bottom of the mounting plate 10, a rotor fixing module 11 is fixedly connected to the bottom of the mounting plate 10, and four limiting rods 12 are fixedly connected to the bottom of the mounting plate 10 and correspond to the four buttons 7 respectively.

[0028] Among them, the transmission device 3 includes a motor 31 fixedly connected to the inside of the protective box 2, and the outer side of the output shaft of the motor 31 is fixedly connected to a threaded rod 32 rotatably connected to the inside of the protective box 2. The outer side of the threaded rod 32 is connected to a transmission block 33 rotatably connected to the four connecting plates 4 through a hinge support through a threaded transmission.

[0029] In this embodiment, in actual use, the start of the motor 31 causes the threaded rod 32 to rotate, and the transmission block 33 moves up and down under the action of the thread.

[0030] There are eight slide grooves in the interior of the protection box 2, and two slide plates 13 are fixedly connected to the outer sides of the four connecting plates 4 and are slidably connected to the eight slide grooves respectively.

[0031] In this embodiment, during actual use, the up and down movement of the transmission block 33 will pull the hinge support and drive the connecting plate 4 to move. At this time, the slide plate 13 moves in the slide groove, which provides movement space for the slide plate 13 while limiting the movement direction of the connecting plate 4.

[0032] The four fixing plates 5 are symmetrically distributed front to back and left to right, the insides of the four fixing plates 5 are all configured to be arc-shaped, and the insides of the four fixing plates 5 are all fixedly connected with friction pads 14 .

[0033] In this embodiment, in actual use, the arc-shaped fixing plate 5 is more adapted to and fits the outer shape of the stator, and the friction pad 14 increases the stability of the fixation between the stator and the fixing plate 5 .

[0034] The single limiting device 6 includes a spring 61 fixedly connected to the top of the single connecting plate 4 , the top of the spring 61 is fixedly connected to a damping plate 62 , and the inside of the damping plate 62 is fixedly connected to a pipe sleeve 63 that penetrates and extends into the inside of the spring 61 .

[0035] In this embodiment, during actual use, the downward pressure of the tube sleeve 63 will cause the damping plate 62 to move downward, and the spring 61 will be compressed at this time.

[0036] The top of the tube sleeve 63 is open, the inner diameter of the tube sleeve 63 is consistent with the outer diameter of the limiting rod 12 , and the tube sleeve 63 is located directly above the button 7 .

[0037] In this embodiment, during actual use, the limiting rod 12 can extend into the interior of the sleeve 63 , and after the spring 61 is compressed, the sleeve 63 contacts and presses the button 7 .

[0038] Working principle:

[0039] First, fix the stator above the protective box 2, and then start the motor 31. The motor 31 will make the threaded rod 32 drive the transmission block 33 to move, thereby driving the connecting plate 4 to move the fixing plate 5 and fix the stator. Place the rotor in the rotor fixing module 11, start the electric push rod 9 to press down the mounting plate 10, at this time, the limit rod 12 will extend into the pipe sleeve 63 and compress the spring 61, the four pipe sleeves 63 contact and press the button 7 at the same time, and the induction light on the L-shaped support plate 8 lights up, indicating that the docking is completed.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concentric press-fitting device for a permanent magnet synchronous motor rotor, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a protection box (2), a transmission device (3) is arranged inside the protection box (2), the outer side of the transmission device (3) is rotatably connected to four connecting plates (4) which are all slidably connected to the inside of the protection box (2) through a hinge support, the inner sides of the four connecting plates (4) are fixedly connected to a fixing plate (5), the tops of the four connecting plates (4) are provided with limiting devices (6), the tops of the four connecting plates (4) are provided with buttons (7) which are respectively located inside the four limiting devices (6), the top of the base (1) is fixedly connected to an L-shaped support plate (8), the bottom of the L-shaped support plate (8) is fixedly connected to an electric push rod (9), the bottom of the electric push rod (9) is fixedly connected to a mounting plate (10), the bottom of the mounting plate (10) is fixedly connected to a rotor fixing module (11), and the bottom of the mounting plate (10) is fixedly connected to four limiting rods (12) which respectively correspond to the four buttons (7).

2. A permanent magnet synchronous motor rotor concentric press-fitting device according to claim 1, characterized in that: The transmission device (3) comprises a motor (31) fixedly connected to the interior of the protection box (2); the outer side of the output shaft of the motor (31) is fixedly connected to a threaded rod (32) rotatably connected to the interior of the protection box (2); the outer side of the threaded rod (32) is connected to a transmission block (33) rotatably connected to the four connecting plates (4) via a hinge support via a threaded transmission.

3. A permanent magnet synchronous motor rotor concentric press-fitting device according to claim 1, characterized in that: The protection box (2) is provided with eight slide grooves inside, and the outer sides of the four connecting plates (4) are fixedly connected with two slide plates (13) which are slidably connected to the eight slide grooves respectively.

4. A permanent magnet synchronous motor rotor concentric press-fitting device according to claim 1, characterized in that: The four fixing plates (5) are symmetrically distributed front-to-back and left-to-right, the interiors of the four fixing plates (5) are all arranged in an arc shape, and the interiors of the four fixing plates (5) are all fixedly connected with friction pads (14).

5. The concentric press-fitting device for a permanent magnet synchronous motor rotor according to claim 1, characterized in that: The single limiting device (6) comprises a spring (61) fixedly connected to the top of the single connecting plate (4); the top of the spring (61) is fixedly connected to a damping plate (62); the inside of the damping plate (62) is fixedly connected to a pipe sleeve (63) that penetrates and extends into the inside of the spring (61).

6. A permanent magnet synchronous motor rotor concentric press-fitting device according to claim 5, characterized in that: The top of the tube sleeve (63) is open, the inner diameter of the tube sleeve (63) is consistent with the outer diameter of the limiting rod (12), and the tube sleeve (63) is located directly above the button (7).

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