Tool for potting epoxy resin on stator of permanent magnet motor

Abstract

The utility model discloses a permanent magnet motor stator epoxy resin filling and sealing tool comprising a lower die, the lower die comprises a circular bottom plate, the middle part of the circular bottom plate is provided with a circular gap, the gap is upwards provided with a hollow cylindrical plate, the outer side of the cylindrical plate is sleeved with a backing plate, the backing plate is connected with the circular bottom plate, and the outer side of the cylindrical plate is also sleeved with a circular ring-shaped positioning plate. The outer edge of the round bottom plate is upwards connected with an outer ring plate, a motor stator is arranged on the round bottom plate, the outer sides of the base plate and the positioning plate abut against the inner side of the stator, the outer ring plate abuts against the outer side of the stator, and the upper end face of the inner side of the stator is located between the upper end face and the lower end face of the positioning plate. According to the utility model, the lower die, the outer ring plate and the upper die are used for resisting and limiting the stator, so that the epoxy resin is prevented from overflowing when being filled, and the filling stability of the epoxy resin is ensured; meanwhile, the position of the positioning plate is adjustable relative to the base plate, thereby being suitable for stator windings with different thicknesses, and improving the practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet motor stator packaging, in particular to a tooling for encapsulating a permanent magnet motor stator with epoxy resin. Background Art

[0002] The insulation protection of the permanent magnet motor stator winding directly affects the life of the motor and the power loss. At present, the commonly used winding insulation methods are insulating varnish and epoxy resin potting. As for the epoxy resin potting method, the top-down filling method is one of the common methods. The epoxy resin flows into the stator under the action of gravity, and is heated and cured after standing, and then the canning is completed. However, in the above method, the flow of epoxy resin cannot be restricted, and there is a possibility of overflow. The epoxy resin that is heated and cured after overflow will directly affect the normal operation of the stator. Utility Model Content

[0003] The utility model aims to provide a tooling with a simple structure and which can ensure that epoxy resin does not overflow during filling in view of the deficiencies in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a tooling for encapsulating the stator of a permanent magnet motor with epoxy resin, which adopts the following technical scheme:

[0005] A tooling for encapsulating epoxy resin in a permanent magnet motor stator comprises a lower die, the lower die comprises a circular bottom plate, a circular notch is provided in the middle of the circular bottom plate, a hollow cylindrical plate is provided upward at the notch, a pad is sleeved on the outer side of the cylindrical plate, the pad is connected to the circular bottom plate, an upper die is also sleeved on the outer side of the cylindrical plate, the upper die comprises a circular positioning plate, a vertically penetrating screw hole is opened on the positioning plate, a bolt is screwed in the screw hole, a positioning groove for inserting the bolt is provided on the pad, an outer ring plate is connected upward to the outer edge of the circular bottom plate, the motor stator is placed on the circular bottom plate, the pad and the outer side of the positioning plate abut against the inner side of the stator, the outer ring plate abuts against the outer side of the stator, and the inner upper end surface of the stator is located between the upper and lower end surfaces of the positioning plate.

[0006] A further improvement of the tooling for encapsulating epoxy resin in a permanent magnet motor stator of the utility model is that an upward protrusion is further provided at the notch, the circular bottom plate, the protrusion and the cylindrical plate are integrally formed, and the pad is mounted on the protrusion.

[0007] The utility model provides a tooling for encapsulating epoxy resin on a permanent magnet motor stator. The tooling is further improved in that a vertical through groove is provided on the protruding portion and the pad, and the through groove is used for clamping the stator core protruding from the stator.

[0008] The utility model provides a tooling for encapsulating epoxy resin in a permanent magnet motor stator in that a fixing plate is provided upwardly from the outer edge of the circular bottom plate, the fixing plate has an L-shaped cross section, the outer ring plate is connected to the fixing plate, the outer ring plate also has an L-shaped cross section, and is matched with the fixing plate.

[0009] A further improvement of the tooling for encapsulating epoxy resin in a permanent magnet motor stator of the utility model is that the lower mold is made of nylon.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model performs resistance and limitation on the stator through the lower die, the outer ring plate and the upper die, thereby preventing the epoxy resin from overflowing during epoxy resin filling, thereby ensuring stable filling; at the same time, the position of the positioning plate is adjustable relative to the pad, which can be suitable for stator windings of different thicknesses, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the lower die, upper die and pad of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the lower mold of the utility model.

[0015] In the figure: 1 circular bottom plate, 2 cylindrical plate, 3 protrusion, 4 pad, 5 positioning plate, 6 bolts, 7 through groove, 8 fixing plate, 9 outer ring plate, 10 stator. DETAILED DESCRIPTION

[0016] 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.

[0017] like Figures 1 to 3 As shown, a tooling for encapsulating epoxy resin in a permanent magnet motor stator includes a lower mold, the lower mold includes a circular bottom plate 1, a circular notch is provided in the middle of the circular bottom plate, a hollow cylindrical plate 2 is provided upward at the notch, a pad 4 is sleeved on the outer side of the cylindrical plate, the pad is connected to the circular bottom plate, and an upper mold is also sleeved on the outer side of the cylindrical plate, the upper mold includes a circular positioning plate 5, a vertically penetrating screw hole is opened on the positioning plate, a bolt 6 is screwed in the screw hole, a positioning groove for inserting the bolt is provided on the pad, an outer ring plate 9 is connected upward to the outer edge of the circular bottom plate, a motor stator 10 is placed on the circular bottom plate, the pad and the outer side of the positioning plate are against the inner side of the stator, the inner side of the outer ring plate is against the outer side of the stator, and the upper end face of the inner side of the stator is located between the upper and lower end faces of the positioning plate. The lower mold can be made of nylon.

[0018] Furthermore, an upward protrusion 3 is provided at the notch, the round bottom plate, the protrusion and the cylindrical plate are integrally formed, and the pad is mounted on the protrusion. The provision of the protrusion facilitates the installation of the pad.

[0019] A vertical through slot 7 is provided on the protruding portion and the pad, and the through slot is used to clamp the stator core protruding from the stator. The design of the through slot positions the stator, thereby ensuring the stability of subsequent filling.

[0020] Furthermore, a fixing plate 8 is provided upwardly on the outer edge of the circular bottom plate, and the fixing plate has an L-shaped cross section, and the outer ring plate is connected to the fixing plate, and the outer ring plate also has an L-shaped cross section, which is adapted to the fixing plate, to prevent the epoxy resin from overflowing from the bottom during filling.

[0021] The working principle of the utility model is as follows: after installing the pad, the stator is arranged so that the outer side of the lower part of the stator abuts against the fixed plate and the inner side abuts against the protrusion and the pad; then the height of the positioning plate is adjusted to adapt to stators of different thicknesses, so that the upper end surface of the stator is placed between the upper and lower end surfaces of the positioning plate; then the outer ring plate is installed, and then epoxy resin is filled. The lower mold, the outer ring plate and the positioning plate are used to realize the overflow of the epoxy resin of the host, thereby ensuring the filling effect.

[0022] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A tool for encapsulating a permanent magnet motor stator with epoxy resin, characterized in that: The invention comprises a lower die, wherein the lower die comprises a circular bottom plate, a circular notch is provided in the middle of the circular bottom plate, a hollow cylindrical plate is provided upward at the notch, a pad is sleeved on the outer side of the cylindrical plate, the pad is connected to the circular bottom plate, an upper die is also sleeved on the outer side of the cylindrical plate, the upper die comprises a circular positioning plate, a vertically penetrating screw hole is opened on the positioning plate, a bolt is screwed in the screw hole, a positioning groove for inserting the bolt is provided on the pad, an outer ring plate is connected upward at the outer edge of the circular bottom plate, the motor stator is placed on the circular bottom plate, the pad and the outer side of the positioning plate abut against the inner side of the stator, the outer ring plate abuts against the outer side of the stator, and the inner upper end surface of the stator is located between the upper and lower end surfaces of the positioning plate.

2. The tooling for encapsulating the stator of a permanent magnet motor with epoxy resin according to claim 1, characterized in that: An upward protrusion is also provided at the notch, the circular bottom plate, the protrusion and the cylindrical plate are integrally formed, and the pad is mounted on the protrusion.

3. The tooling for encapsulating the stator of a permanent magnet motor with epoxy resin according to claim 2, characterized in that: The protruding portion and the backing plate are provided with a vertical through slot, and the through slot is used for clamping the stator core protruding from the stator.

4. The tooling for encapsulating the stator of a permanent magnet motor with epoxy resin according to claim 3, characterized in that: A fixing plate is arranged upwardly on the outer edge of the circular bottom plate, and the fixing plate has an L-shaped cross section. The outer ring plate is connected to the fixing plate, and the outer ring plate also has an L-shaped cross section, which is matched with the fixing plate.

5. The tooling for encapsulating the stator of a permanent magnet motor with epoxy resin according to claim 4, characterized in that: The lower mold is made of nylon.

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