Motor waterproof sealing structure and direct current brushless motor

Abstract

The utility model discloses a motor waterproof sealing structure and a direct current brushless motor, the motor waterproof sealing structure comprises an injection molding stator and an end cover, the injection molding stator comprises a stator iron core and a plastic package body wrapped outside the stator iron core, the periphery of the plastic package body protrudes radially to form a convex edge used for being connected with the end cover, and the end cover is connected with the plastic package body. The motor is characterized in that the convex edge of the plastic package body is provided with a groove, a sealing ring is arranged in the groove, and the end cover is pressed on the sealing ring to seal the inner cavity of the motor. The groove is formed in the plastic package body, machining is easy, the manufacturing cost is low, the machining precision of the groove is high, sealing failure caused by insufficient machining precision is avoided, the sealing ring is easy to install, and the sealing effect is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to a waterproof sealing structure for a motor and a DC brushless motor. Background Art

[0002] The existing DC brushless outdoor motor for air conditioners includes an injection-molded stator, which includes a stator core and a plastic-sealed body wrapping the stator core. An inner cavity is provided in the plastic-sealed body, and a rotor assembly is installed in the inner cavity. The inner cavity is sealed by an end cover, and a waterproof sealing structure is provided between the injection-molded stator and the end cover. The existing waterproof sealing structure is to process a sealing ring groove on the side of the end cover spigot, install the sealing ring into the sealing ring groove, and seal through the side of the spigot and the side wall of the stator spigot, and the sealing ring and the side wall of the stator spigot to achieve the purpose of waterproofing. However, this waterproof sealing structure has the following disadvantages: 1. The processing accuracy requirements for the end cover are high, the processing efficiency is low, and the processing cost is very high. It is easy to have the sealing ring groove not concentric with the spigot on the end cover, which may lead to sealing failure; 2. The installation efficiency of the sealing ring is very low. It is necessary to extrude the sealing ring into the sealing ring groove. When extruding the sealing ring, it is easy to have uneven force and the sealing ring is not installed in place, which may lead to sealing failure. Summary of the Utility Model

[0003] The utility model provides a waterproof sealing structure for a motor and a DC brushless motor, which are used to solve the problems of low processing efficiency and easy sealing failure of the motor waterproof sealing structure in the prior art.

[0004] The technical solution of the utility model is realized as follows:

[0005] The first object of the utility model is to provide a waterproof sealing structure for a motor, including an injection-molded stator and an end cover. The injection-molded stator includes a stator core and a plastic-sealed body wrapped outside the stator core. A convex edge for connecting with the end cover protrudes radially from the periphery of the plastic-sealed body. The feature is that: a groove is provided on the convex edge of the plastic-sealed body, and a sealing ring is installed in the groove, and the end cover presses on the sealing ring to seal the inner cavity of the motor.

[0006] The above-mentioned end cover is provided with an annular convex platform, which is correspondingly arranged with the groove. The annular convex platform extends into the groove and presses on the sealing ring.

[0007] The above-mentioned annular convex platform is arranged on the top of the spigot of the end cover.

[0008] The first object of the utility model is to provide a DC brushless motor, including a rotor assembly, an injection-molded stator and an end cover. A motor waterproof sealing structure is provided between the injection-molded stator and the end cover. The feature is that: the motor waterproof sealing structure is the above-mentioned waterproof sealing structure for a motor.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] 1. The motor waterproof sealing structure includes an injection-molded stator and an end cover. The injection-molded stator includes a stator core and a plastic-sealed body wrapped around the stator core. A convex edge for connecting with the end cover protrudes radially from the periphery of the plastic-sealed body. It is characterized in that: a groove is provided on the convex edge of the plastic-sealed body, a sealing ring is installed in the groove, and the end cover presses on the sealing ring to seal the inner cavity of the motor. The groove is formed on the plastic-sealed body, which is easy to process and has a low manufacturing cost. The machining accuracy of the groove is high, avoiding sealing failure caused by insufficient machining accuracy, and the sealing ring is easy to install.

[0011] 2. Other advantages of the present utility model are described in detail in the embodiment part. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The top view of the DC brushless motor using the motor waterproof sealing structure provided in Embodiment 1 of the present utility model;

[0013] Figure 2 is Figure 1 the A-A sectional view of;

[0014] Figure 3 is Figure 2 the enlarged view at B of;

[0015] Figure 4 The exploded view of the DC brushless motor using the motor waterproof sealing structure provided in Embodiment 1 of the present utility model;

[0016] Figure 5 The structural schematic diagram of the DC brushless motor provided in Embodiment 2 of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1:

[0019] As Figures 1 to 4 shown, the present embodiment provides a motor waterproof sealing structure, including an injection-molded stator 1 and an end cover 2. The injection-molded stator 1 includes a stator core 11 and a plastic-sealed body 12 wrapped around the stator core. A convex edge 121 for connecting with the end cover 2 protrudes radially from the periphery of the plastic-sealed body 12. It is characterized in that: a groove 122 is provided on the convex edge 121 of the plastic-sealed body 12, a sealing ring 3 is installed in the groove 122, and the end cover 2 presses on the sealing ring 3 to seal the inner cavity 100 of the motor.

[0020] For the motor waterproof and sealing structure, the groove 122 is formed on the plastic sealing body 12. It has a simple structure, is easy to process, and has a low manufacturing cost. The groove 122 has a high machining precision, avoiding sealing failure caused by insufficient machining precision. The sealing ring 3 is easy to install and has a high assembly efficiency, which more effectively ensures the sealing effect.

[0021] The above-mentioned end cover 2 is provided with an annular boss 21. The annular boss 21 is correspondingly arranged with the groove 122. The annular boss 21 extends into the groove 122 and presses on the sealing ring 3. The annular boss 21 pressing on the sealing ring 3 further ensures the sealing effect.

[0022] The above-mentioned annular boss 21 is arranged at the top of the stop 22 of the end cover 2. The annular boss 21 is easy to machine.

[0023] Embodiment Two:

[0024] As Figure 5 shown, the direct current brushless motor provided in this embodiment includes a rotor assembly, an injection-molded stator 1 and an end cover 2. A motor waterproof and sealing structure is provided between the injection-molded stator 1 and the end cover 2. It is characterized in that: the motor waterproof and sealing structure is the motor waterproof and sealing structure described in Embodiment One.

[0025] By improving the motor waterproof and sealing structure, the waterproof and sealing performance of the direct current brushless motor is ensured, making the operation of the direct current brushless motor more stable and having a longer working life.

[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A waterproof sealing structure for an electric motor, comprising an injection-molded stator (1) and an end cover (2). The injection-molded stator (1) includes a stator core (11) and a plastic-sealed body (12) wrapped around the stator core. A convex edge (121) for connecting with the end cover (2) protrudes radially from the periphery of the plastic-sealed body (12). It is characterized in that: The convex edge (121) of the plastic-sealed body (12) is provided with a groove (122), and a sealing ring (3) is installed in the groove (122). The end cover (2) presses on the sealing ring (3) to seal the inner cavity (100) of the motor.

2. The waterproof sealing structure of an electric motor according to claim 1, characterized in that: The end cover (2) is provided with an annular boss (21), the annular boss (21) is arranged corresponding to the groove (122), and the annular boss (21) extends into the groove (122) and presses on the sealing ring (3).

3. The motor waterproof sealing structure according to claim 2, characterized in that: The annular boss (21) is arranged at the top of the rabbet (22) of the end cover (2).

4. A brushless DC motor, comprising a rotor assembly, an injection-molded stator (1) and an end cover (2), and a motor waterproof sealing structure is provided between the injection-molded stator (1) and the end cover (2), characterized in that: The motor waterproof sealing structure is the motor waterproof sealing structure described in any one of claims 1 to 3.

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