Electric machine with a sealing structure

Abstract

The utility model discloses a kind of motors with sealing structure, including motor body and controller, motor body includes motor rear end cover, controller is installed in motor rear end cover outside, controller includes control box, upper cover, and control panel, control box is equipped with cavity, control panel is installed in cavity, upper cover seals cavity, the box bottom of control box is equipped with controller wire hole, sleeve is protruded in the periphery of controller wire hole, motor rear end cover is equipped with motor outlet hole, control panel is equipped with through-hole, sleeve one end passes through motor outlet hole and enters motor body, sleeve other end passes through through-hole, cavity is filled with potting adhesive, potting adhesive covers the component of control panel, the three-phase line of motor passes through sleeve and enters cavity from the inner chamber of motor body and is electrically connected with control panel. The cooperation of sleeve and motor outlet hole strengthens the sealing between motor body and controller;Potted adhesive covers the component on the front of control panel, avoids condensed water into cavity and causes control panel short-circuit failure.

Description

Technical Field

[0001] This utility model relates to a motor with a sealing structure. Background Technology

[0002] Existing sealed motors consist of a motor and a controller. The motor body includes a rotor assembly, a stator assembly, a housing, and a rear end cover. The stator assembly is installed inside the housing, and the rotor assembly is fitted inside the stator assembly. The rear end cover is installed at the rear of the housing and seals the inner cavity. The controller is installed outside the rear end cover and includes a control box, a top cover, and a control board. The control box has a cavity, and the control board is installed inside the cavity. The top cover seals the cavity. In motor applications, sealed motors suffer from problems such as high temperature rise, easy backflow of condensate inside the motor, and a high rate of short-circuit failures on the control board. Therefore, the selection of components on the control board requires high precision during the design process, resulting in a narrow selection range and high cost. This makes them unsuitable for high-power sealed motor designs and hinders widespread adoption. Utility Model Content

[0003] This invention provides a motor with a sealed structure to solve the problem in the prior art where condensate inside the motor easily flows back and causes a high rate of short-circuit failures in the control board.

[0004] The technical solution of this utility model is implemented as follows:

[0005] The purpose of this utility model is to provide a motor with a sealed structure, including a motor body and a controller. The motor body includes a rotor assembly, a stator assembly, a housing, and a motor rear end cover. The stator assembly is installed inside the housing cavity, and the rotor assembly is fitted inside the stator assembly. The motor rear end cover is installed at the rear end of the housing and seals the inner cavity. The controller is installed outside the motor rear end cover. The controller includes a control box, a top cover, and a control board. The control box has a cavity, and the control board is installed inside the cavity. The top cover seals the cavity. The key feature is that the bottom of the control box has a controller through hole, and the outer periphery of the controller through hole protrudes axially to form a sleeve. The motor rear end cover has a motor outlet hole corresponding to the sleeve. The control board has a through hole corresponding to the sleeve. One end of the sleeve passes through the motor outlet hole into the cavity, and the other end of the sleeve passes through the through hole and extends out of the control board. The cavity of the control box is filled with potting compound, which covers the components of the control board. The three-phase wires of the motor pass through the sleeve from the inner cavity of the motor body into the cavity of the control box and are electrically connected to the control board.

[0006] The top surface of the potting compound is lower than the top of the sleeve.

[0007] A wire passage sealing gasket is provided between the sleeve and the motor outlet hole as described above.

[0008] The outer periphery of the motor outlet hole mentioned above protrudes axially towards the control box to form an annular protrusion, which is fitted over the sleeve.

[0009] The aforementioned motor outlet hole has an inwardly protruding flange at its edge, and the wire hole sealing gasket is installed between the top of the sleeve and the inwardly protruding flange.

[0010] The inner ring of the aforementioned wire hole sealing gasket protrudes outward towards the rear end cover of the motor, with the outer flange attached to the inner wall of the inner flange and the end of the outer flange extending into the inner cavity.

[0011] The control panel described above is also covered with a dust cover.

[0012] The control board described above has a terminal block mounted on its front side. The terminal block has terminals that are electrically connected to the control circuit on the control board. The three-phase wires of the motor are electrically connected to the control board through the terminals.

[0013] The dust cover described above has a reserved hole for wiring terminals, and the top of the wiring terminal passes through the reserved hole for wiring terminals.

[0014] The control box described above has several heat dissipation fins on its sides and bottom.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] 1. The motor with a sealed structure includes a motor body and a controller. The motor body includes a rotor assembly, a stator assembly, a housing, and a motor rear end cover. The stator assembly is installed inside the housing cavity, and the rotor assembly is fitted inside the stator assembly. The motor rear end cover is installed at the rear end of the housing and seals the inner cavity. The controller is installed outside the motor rear end cover. The controller includes a control box, a top cover, and a control board. The control box has a cavity, and the control board is installed inside the cavity. The top cover seals the cavity. The controller has a controller through hole at the bottom of the control box, and the outer periphery of the controller through hole protrudes axially to form a sleeve. The motor rear end cover has a motor outlet hole corresponding to the sleeve. The control board has a through hole corresponding to the sleeve. One end of the sleeve passes through the motor outlet hole into the cavity, and the other end of the sleeve passes through the through hole and extends out of the control board. The cavity of the control box is filled with potting compound, which covers the components of the control board. The three-phase wires of the motor pass through the sleeve from the inner cavity of the motor body into the cavity of the control box and are electrically connected to the control board. The fit between the sleeve and the motor outlet hole, and the fit between the sleeve and the through hole, strengthens the seal between the motor body and the controller. The potting compound covers the components on the front of the control board, preventing condensation from entering the cavity and causing short circuit failure of the control board. This not only facilitates the selection of components on the control board, but also solves the problem of controller failure caused by condensation.

[0017] 2. Other advantages of this utility model are described in detail in the embodiments section. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a motor with a sealing structure provided in an embodiment of the present utility model;

[0019] Figure 2 A bottom view of an electric motor with a sealed structure;

[0020] Figure 3 for Figure 2 AA cross-sectional view;

[0021] Figure 4 for Figure 3 Enlarged view of point B;

[0022] Figure 5 An exploded view of a motor with a sealed structure;

[0023] Figure 6 for Figure 5 Enlarged view of point C;

[0024] Figure 7 This is a schematic diagram of the control box in a motor with a sealed structure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] like Figures 1 to 7As shown, this embodiment provides a motor with a sealed structure, including a motor body and a controller. The motor body includes a rotor assembly 72, a stator assembly 71, a housing 6, and a rear end cover 5. The stator assembly 71 is installed inside the inner cavity 60 of the housing 6, and the rotor assembly 72 is fitted inside the stator assembly 71. The rear end cover 5 is installed at the rear end of the housing 6 and seals the inner cavity 60. The controller is installed outside the rear end cover 5 and includes a control box 1, a top cover 2, and a control board 3. The control box 1 has a cavity 10, the control board 3 is installed inside the cavity 10, and the top cover 2 seals the cavity 10. The key feature is that the bottom of the control box 1... A controller through hole 11 is provided, and a sleeve 12 is formed by the axial protrusion of the outer periphery of the controller through hole 11. A motor outlet hole 51 corresponding to the sleeve 12 is provided on the rear end cover 5 of the motor. A through hole 33 corresponding to the sleeve 12 is provided on the control board 3. One end of the sleeve 12 passes through the motor outlet hole 51 and enters the cavity 10 of the control box 1. The other end of the sleeve 12 passes through the through hole 33 and extends out of the control board 3. The cavity 10 of the control box 1 is filled with potting compound 30, which covers the components of the control board 3. The three-phase wires of the motor pass through the sleeve 12 from the inner cavity 60 of the motor body and enter the cavity 10 of the control box 1 and are electrically connected to the control board 3.

[0027] The motor with a sealed structure strengthens the seal between the motor body and the controller through the cooperation of the sleeve 12 with the motor outlet hole 51 and the sleeve 12 with the through hole 33; the potting compound 30 covers the components on the front of the control board 3, preventing condensate from entering the cavity 10 and causing the control board 3 to short-circuit and fail, which not only facilitates the selection of components on the control board 3, but also solves the problem of controller failure caused by condensate.

[0028] The top surface of the potting compound 33 is lower than the top of the sleeve 12, which effectively prevents condensate from entering the motor body through the sleeve 12 and the motor outlet hole 51, thus solving the problem of failure caused by condensate inside the motor body.

[0029] A wire passage sealing gasket 9 is provided between the sleeve 12 and the motor outlet hole 51. A top cover sealing gasket is also provided between the top cover 2 and the control box 1. The wire passage sealing gasket 9 enhances the seal between the motor body and the controller when they are assembled and connected.

[0030] The outer periphery of the motor outlet hole 51 described above protrudes axially towards the control box 1 to form an annular protrusion 52, which fits over the sleeve 12. This further enhances the seal between the motor body and the controller.

[0031] The motor outlet hole 51 described above has an inwardly protruding inner flange 53, and the wire hole sealing gasket 9 is installed between the top of the sleeve 12 and the inner flange 53.

[0032] The inner ring of the aforementioned wire hole sealing gasket 9 protrudes outward with an outer flange 91 towards the rear end cover 5 of the motor. The outer flange 91 is attached to the inner wall of the inner flange 53 and the end of the outer flange 91 extends into the inner cavity 60.

[0033] The control board 3 described above is also covered with a dust cover 8. The dust cover 8 can prevent foreign objects from falling into the controller when the customer installs / replaces the motor leads, making the controller safer.

[0034] The control board 3 described above has a wiring board 31 mounted on its front side. The wiring board 31 has wiring terminals 32 mounted on it. The wiring terminals 32 are electrically connected to the control circuit on the control board 3. The three-phase wires of the motor are electrically connected to the control board 3 through the wiring terminals 32.

[0035] The dust cover 8 described above is provided with a terminal pre-drilled hole 81, through which the top of the terminal 32 passes.

[0036] The control box 1 described above is provided with several heat dissipation ribs 13 on its sides and bottom. The heat dissipation ribs 13 can increase effective heat dissipation, and because the bottom of the control box 1 has heat dissipation ribs on the contact surface with the rear end cover 5 of the motor, the heat of the motor cannot be directly transferred to the controller, thus reducing heat radiation.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A motor with a sealed structure, comprising a motor body and a controller, the motor body comprising a rotor assembly (72), a stator assembly (71), a housing (6), and a motor rear end cover (5), the stator assembly (71) being installed in the inner cavity (60) of the housing (6), the rotor assembly (72) being fitted inside the stator assembly (71), the motor rear end cover (5) being installed at the rear end of the housing (6) and sealing the inner cavity (60), the controller being installed on the outside of the motor rear end cover (5), the controller comprising a control box (1), a top cover (2), and a control board (3), the control box (1) having a cavity (10), the control board (3) being installed in the cavity (10), and the top cover (2) sealing the cavity (10), characterized in that: The bottom of the control box (1) is provided with a controller through hole (11). The outer periphery of the controller through hole (11) protrudes axially to form a sleeve (12). The motor rear end cover (5) is provided with a motor outlet hole (51) corresponding to the sleeve (12). The control board (3) is provided with a through hole (33) corresponding to the sleeve (12). One end of the sleeve (12) passes through the motor outlet hole (51) and enters the cavity (10). The other end of the sleeve (12) passes through the through hole (33) and extends out of the control board (3). The cavity (10) of the control box (1) is filled with potting compound (30). The potting compound (30) covers the components of the control board (3). The three-phase wires of the motor pass through the sleeve (12) from the inner cavity (60) of the motor body and enter the cavity (10) of the control box (1) and are electrically connected to the control board (3).

2. The motor with a sealing structure according to claim 1, characterized in that: The top surface of the potting compound is lower than the top of the sleeve (12).

3. The motor with a sealing structure according to claim 2, characterized in that: A wire passage sealing gasket (9) is provided between the sleeve (12) and the motor outlet hole (51).

4. The motor with a sealing structure according to claim 3, characterized in that: The outer periphery of the motor outlet hole (51) protrudes axially toward the control box (1) to form an annular protrusion (52), which is fitted over the sleeve (12).

5. A motor with a sealed structure according to claim 4, characterized in that: The edge of the motor outlet hole (51) protrudes inward with an inner flange (53), and the wire hole sealing gasket (9) is installed between the top of the sleeve (12) and the inner flange (53).

6. A motor with a sealing structure according to claim 5, characterized in that: The inner ring of the wire hole sealing gasket (9) protrudes outward with an outer flange (91) towards the rear end cover (5) of the motor. The outer flange (91) is attached to the inner wall of the inner flange (53) and the end of the outer flange (91) extends into the inner cavity (60).

7. A motor with a sealed structure according to any one of claims 1 to 6, characterized in that: The control panel (3) is also covered with a dust cover (8).

8. A motor with a sealing structure according to claim 7, characterized in that: A wiring board (31) is installed on the front of the control board (3). A wiring terminal (32) is installed on the wiring board (31). The wiring terminal (32) is electrically connected to the control circuit on the control board (3). The three-phase wires of the motor are electrically connected to the control board (3) through the wiring terminal (32).

9. A motor with a sealing structure according to claim 8, characterized in that: The dust cover (8) is provided with a terminal pre-drilled hole (81), and the top of the terminal (32) passes through the terminal pre-drilled hole (81).

10. A motor with a sealing structure according to claim 7, characterized in that: The control box (1) is provided with several heat dissipation fins (13) on its side and bottom.

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