External pasting type variable frequency motor rotor magnetic shoe positioning device

Abstract

The utility model relates to an externally-attached variable frequency motor rotor magnetic shoe positioning device which comprises a back plate, an axial positioning plate is arranged on the left side face of the back plate, the axial positioning plate is provided with a boss and a sliding groove, a magnetic sheet is slidably connected in the sliding groove, and a chamfer for preventing the magnetic sheet from being separated is arranged along the edge of the sliding groove. During implementation, the back plate and the axial positioning plate are in butt joint with the end face of the rotor core, and the magnetic sheets play a role in magnetically connecting the back plate, the axial positioning plate and the end face of the rotor core through magnetic force. The magnetic shoe axial positioning device is simple in structure and convenient to operate, is tightly connected with the end face of a rotor iron core, effectively ensures the axial positioning size of a magnetic shoe, and can be quickly and effectively taken out from a finished rotor after rotor magnetic shoe glue is dried. The product effectively ensures that the magnetic shoes are axially positioned on the surface of the rotor iron core, avoids the problem that the end surfaces of the magnetic shoes around the rotor iron core in the prior art are uneven, and improves the production efficiency and performance of the rotor.

Description

TECHNICAL FIELD

[0001] The utility model relates to permanent magnet motor manufacturing field, concretely relates to a kind of external paste type frequency conversion motor rotor magnetic tile positioning device. BACKGROUND

[0002] In today's permanent magnet motor manufacturing process, external paste rotor magnetic tile is positioned in the axial direction of rotor core, and the following two axial fixing methods are usually used: a baffle is installed at the end of rotor core, and a certain thickness of pad is supplemented to rotor core. However, if in a specific occasion, such as the end of the magnetic tile needs to extend out of the rotor core by a certain distance, and there is no effective axial positioning member, the above two axial fixing methods cannot be used.

[0003] In order to solve the problem that the above two axial fixing methods cannot be used in a specific occasion, the existing technology often uses the following temporary measures: a pad is added at the bottom of the core, and a magnetic tile is fixed by a hose clamp around the magnetic tile. However, the rotor made by this temporary measure will cause the end surface of the magnetic tile around the rotor core to be uneven, and the process is complex. SUMMARY

[0004] To solve the above problems, the utility model provides an external paste type frequency conversion motor rotor magnetic tile positioning device, which can overcome the above shortcomings of the prior art:

[0005] An external paste type frequency conversion motor rotor magnetic tile positioning device, comprising a back plate, an axial positioning plate is provided on the left side of the back plate, the axial positioning plate is provided with a boss and a sliding groove, a magnetic sheet is slidably connected in the sliding groove, and a chamfer is provided along the edge of the sliding groove to prevent the magnetic sheet from being separated. In implementation, the back plate and the axial positioning plate are connected to the end surface of the rotor core, and the magnetic sheet magnetically connects the back plate, the axial positioning plate and the end surface of the rotor core through magnetic force.

[0006] Preferably, the back plate and the axial positioning plate are integrally cast or fixedly connected.

[0007] Preferably, the back plate and the axial positioning plate are both circular, and the central axes of the two coincide.

[0008] Preferably, the back plate is provided with an opening penetrating in the axial direction in the middle part.

[0009] Preferably, the opening is circular.

[0010] Preferably, a plurality of pin holes are provided on the back plate and the axial positioning plate, the end surface of the rotor core is also provided with pin holes corresponding to the pin holes, and the pin holes are connected by a willow nail. In implementation, the pin holes, the pin holes and the willow nail are used to ensure that the back plate, the axial positioning plate and the rotor core maintain the same central axis (i.e. the same center).

[0011] Preferably, the number of the pinholes is three.

[0012] Preferably, all the pinholes are distributed around the central axis of the back plate and axial positioning plate.

[0013] Preferably, the sliding groove divides the boss into two parts with equal area and symmetry.

[0014] Preferably, the magnetic sheet is a strong magnetic sheet.

[0015] The product has the advantages of simple structure, convenient operation, close connection with the rotor core end face, effective guarantee of the axial positioning size of the magnetic shoe, quick and effective removal of the axial positioning device of the magnetic shoe from the finished rotor after the rotor magnetic shoe glue is dried, effective guarantee of the axial positioning of the magnetic shoe on the surface of the rotor core, avoidance of the uneven end face of the magnetic shoe around the rotor core in the prior art, and improvement of the production efficiency and performance of the rotor. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in detail below according to the drawings.

[0017] Figure 1 The outer-pasted variable frequency motor rotor magnetic shoe positioning device front view.

[0018] Figure 2 The outer-pasted variable frequency motor rotor magnetic shoe positioning device side view.

[0019] Figure 3 The outer-pasted variable frequency motor rotor magnetic shoe positioning device perspective view.

[0020] Figure 4 The outer-pasted variable frequency motor rotor magnetic shoe positioning device rear view.

[0021] Figure 5 The willow nail schematic view.

[0022] Figure 6 The outer-pasted variable frequency motor rotor magnetic shoe positioning device, rotor core end face docking schematic view. DETAILED DESCRIPTION

[0023] The technical scheme in the utility model embodiment will be described clearly and completely below with reference to the drawings in the utility model embodiment.

[0024] As Figures 1-6 As shown in the above technical scheme of the utility model, the above technical scheme of the utility model will be described in detail below through specific use mode.

[0025] The external paste type variable frequency motor rotor magnetic tile positioning device, comprising a back plate 1, an axial positioning plate 2 is arranged on the left side of the back plate 1, the axial positioning plate 2 is provided with a boss 201 and a sliding groove 202, a magnetic sheet 3 is slidably connected in the sliding groove 202, and a chamfer 203 is arranged on the boss 201 along the edge of the sliding groove 202 and used for preventing the magnetic sheet 3 from being separated. When the back plate 1 and the axial positioning plate 2 are connected to the end face of the rotor core, the magnetic sheet 3 is used to magnetically connect the back plate 1, the axial positioning plate 2 and the end face of the rotor core 6 through magnetic force.

[0026] In an embodiment, the back plate 1 and the axial positioning plate 2 are integrally cast or fixedly connected.

[0027] In an embodiment, the back plate 1 and the axial positioning plate 2 are both circular rings, and the central axes of the two coincide.

[0028] In an embodiment, the back plate 1 is provided with an opening 101 penetrating the back plate 1 in the axial direction.

[0029] In an embodiment, the opening 101 is circular.

[0030] In an embodiment, a plurality of pin holes one 4 penetrating the back plate 1 and the axial positioning plate 2 in the axial direction are arranged on the back plate 1 and the axial positioning plate 2, the end face of the rotor core 6 is also provided with pin holes two corresponding to the pin holes one 4, and the pin holes one 4 and the pin holes two are connected through a pin 5. When the pin holes one 4, the pin holes two and the pin 5 are used to ensure that the back plate 1, the axial positioning plate 2 and the rotor core 6 coincide in the central axis (i.e., the centers coincide).

[0031] In an embodiment, the number of the pin holes one 4 is three.

[0032] In an embodiment, all the pin holes one 4 are distributed around the central axes of the back plate 1 and the axial positioning plate 2.

[0033] In an embodiment, the sliding groove 202 divides the boss 201 into two parts with equal areas and symmetry.

[0034] In an embodiment, the magnetic sheet 3 is a strong magnetic sheet.

[0035] Working principle: the strong magnetic sheet is used to attract the product to the end face of the rotor core without gap, the axial positioning plate 2 forms a step on the back plate 1, the height of the step can be used as the distance allowing the magnetic tile to extend out of the end face of the rotor core 6. The pin holes one 4, the pin holes two and the pin 5 are used to ensure that the back plate 1, the axial positioning plate 2 and the rotor core 6 coincide in the central axis, i.e., the centers coincide. The chamfer 203 arranged on the boss 201 avoids that the overflowed magnetic tile glue is pasted on the positioning plate. The axial positioning tool structure of the magnetic tile is compact, and the tool is easy to disassemble and assemble. After the magnetic tile glue is solidified, the tool is easy to take out from the rotor.

[0036] In summary, through the unique technical scheme, the product has simple structure, convenient operation, is connected closely with the end face of the rotor core, and effectively ensures the axial positioning size of the magnetic shoe, and after the rubber of the rotor magnetic shoe is dried, the axial positioning device of the magnetic shoe can be quickly and effectively taken out from the finished rotor.

[0037] In the description of the utility model, it is understood that the indicated orientation or position relation is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation structure and operation, so it cannot be understood as a limitation on the utility model.

Claims

1. An externally mounted variable frequency motor rotor magnetic tile positioning device, characterized in that, Includes a back plate (1), the left side of which is provided with an axial positioning plate (2), the axial positioning plate (2) is provided with a boss (201) and a groove (202), a magnetic piece (3) is slidably connected in the groove (202), and the boss (201) is provided with a chamfer (203) along the edge of the groove (202) to prevent the magnetic piece (3) from detaching.

2. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 1, characterized in that, The back plate (1) and the axial positioning plate (2) are integrally cast or fixedly connected.

3. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 1, characterized in that, The back plate (1) and the axial positioning plate (2) are respectively annular, and their central axes coincide.

4. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 3, characterized in that, The back plate (1) has an axially upward through opening (101) in the middle.

5. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 4, characterized in that, The opening (101) is circular.

6. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 3, characterized in that, The back plate (1) and the axial positioning plate (2) are provided with a number of axially penetrating nail holes (4). The end face of the rotor core (6) is also provided with nail holes (2) corresponding to the nail holes (4). The nail holes (4) and nail holes (2) are connected by rivets (5). In practice, the nail holes (4), nail holes (2) and rivets (5) are used to ensure that the back plate (1), the axial positioning plate (2) and the rotor core (6) keep their central axes aligned.

7. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 6, characterized in that, The number of nail holes (4) is 3.

8. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 6, characterized in that, All of the aforementioned nail holes (4) are distributed around the central axis of the back plate (1) and the axial positioning plate (2).

9. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 1, characterized in that, The groove (202) divides the boss (201) into two parts with equal and symmetrical areas.

10. The externally attached variable frequency motor rotor magnetic tile positioning device as described in claim 1, characterized in that, The magnetic sheet (3) is a high-strength magnetic sheet.

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