CN202798409U - A New Structure of Brushless DC Motor - Google Patents

Abstract

The utility model discloses a novel direct current brushless motor structure, comprising a rotor assembly (1), a stator core (2), an end insulation (3), a casing (4), an end cover (5) and a circuit board (6), wherein the stator core (2) is nested outside the rotor assembly (1), the end insulation (3) is mounted on both ends of the stator core (2), the stator core (2) and the casing (4) are connected together, and the end cover (5) is mounted on the casing (4), and the utility model further comprises a tray (7), the tray (7) is supported on the end insulation (3), the circuit board (6) is embedded in a groove (71) provided on the tray (7), the groove (71) is filled with a potting material (8), and the potting material (8) covers part or all of the circuit board (6), and the utility model has a simple structure, low cost, good reliability and good sealing and waterproofing effect.

Description

A New Structure of Brushless DC Motor

Technical field:

The utility model relates to a novel DC brushless motor structure, which belongs to the field of washing machine motors.

Background technique:

Traditional brushless DC motors for washing machines usually use plastic-encapsulated motors, but the development cost of this type of motor structure is very high, and the installation reliability is poor, while ordinary DC brushless motors include stator cores, end insulation and circuit boards. The end insulation is installed at both ends of the stator core, and the circuit board is directly installed on the end insulation. The waterproof and sealing effect of the motor with this structure is poor.

Invention content:

The purpose of the utility model is to provide a new DC brushless motor structure, which is simple in structure, low in cost, good in reliability and good in sealing and waterproofing effect.

The utility model is realized through the following technical solutions:

A new type of DC brushless motor structure, including rotor assembly, stator core, end insulation, casing, end cover and circuit board, the stator core is nested outside the rotor assembly, and the end insulation is installed at both ends of the stator core , the stator core is connected with the case, the end cover is installed on the case, it also includes a tray, the tray is supported on the end insulation, the circuit board is embedded in the groove opened on the tray, and the potting material is filled in the groove. The potting material covers part or all of the circuit board.

The above-mentioned end insulation is provided with a support plate, the end positioning column protrudes from the end surface of the support plate, the end positioning column and the support plate form an end step, and a positioning through hole is opened on the bottom surface of the groove of the tray. The outer side of the hole and the groove of the tray protrude downward from the lower bump, and the lower bump is provided with a bump step, which cooperates with the end step, the bump is supported on the support plate, and the end positioning column passes through the positioning The through holes are embedded in the circuit board.

The support block protrudes from the bottom surface of the groove of the above-mentioned tray, the tray positioning column protrudes from the end surface of the support block, the circuit board is supported on the support block, and the tray positioning column is embedded in the circuit board.

The inner wall surface of the above-mentioned casing is provided with a casing step, and a supporting boss protrudes from the step, and a threaded hole is provided on the supporting boss, and lugs protrude from the outer wall surface of the tray, and mounting holes are provided on the lugs. The lug is supported on the support boss, and the screw is screwed into the threaded hole through the mounting hole to lock the pallet.

The above-mentioned screws are screwed into the step holes on the steps of the casing through the end cover to lock the end cover on the casing.

The above-mentioned tray protrudes downwards from the sheath, the Hall element installed on the circuit board is embedded in the sheath and covered by the sheath, and the Hall element is located outside the permanent magnet on the rotor assembly.

Power components are installed on the above-mentioned circuit board, and the power components are closely attached to the inner surface of the end cover, and a number of cooling ribs are arranged above the power components and on the top surface of the end cover.

As mentioned above, a tray through hole is provided on the inner side of the groove and on the tray.

The above-mentioned ring-shaped upper protrusion protrudes upward from the groove of the tray outside the positioning through hole, and the upper protrusion is embedded in the circuit board.

The above-mentioned casing and end cover are formed by cast aluminum.

Compared with the prior art, the structure of the utility model has the following effects: 1) The utility model adds a tray, the tray is supported on the end insulation, the circuit board is embedded in the groove opened on the tray, and the groove is filled with potting Material, potting material covers part or all of the circuit board, simple structure, low cost, good reliability, good sealing and waterproof effect; 2) There is a support plate on the end insulation, the end positioning column protrudes from the end surface of the support plate, The upper positioning column and the support plate form an end step, and a positioning through hole is opened on the bottom surface of the groove of the tray. Outside the positioning through hole, the lower protrusion protrudes downward from the groove of the tray, and the lower protrusion is provided with a protrusion step. The bump step and the end step cooperate with each other, the bump is supported on the support plate, and the end positioning column is inserted into the circuit board through the positioning through hole, the structure design is reasonable, the tray positioning is accurate, and the installation is convenient; 3) the groove of the tray The support block protrudes from the bottom surface, and the tray positioning column protrudes from the end surface of the support block. The circuit board is supported on the support block, and the tray positioning column is embedded in the circuit board. The circuit board is positioned accurately and is easy to install; 4) There is a The steps of the casing, the supporting bosses protrude from the steps, and the supporting bosses are provided with threaded holes. The outer wall of the tray protrudes from the lugs, and the lugs are provided with mounting holes. The lugs are supported on the supporting bosses, and the screws pass through the installation. The hole is screwed into the threaded hole to lock the tray, the structure is simple, and the tray is installed firmly; 5) The tray protrudes downwards from the sheath, and the Hall element installed on the circuit board is embedded in the sheath and covered by the sheath. The element is located outside the permanent magnet on the rotor assembly. The Hall element is easy to locate, has high precision and good sealing effect; 6) Power components are installed on the circuit board, and the power components are closely attached to the inner surface of the end cover. There are several heat dissipation ribs above the components and on the top surface of the end cover, the structure design is reasonable, and the heat dissipation effect is good; 7) There is a tray through hole on the inner side of the groove and on the tray, and the rotating shaft passes through the tray through hole and is supported on the end cover On the bearing, the structure design is reasonable.

Description of drawings:

Fig. 1 is a perspective view of the utility model;

Fig. 2 is an exploded view of the utility model;

Fig. 3 is a structural representation of the utility model;

Fig. 4 is the A-A part sectional view of Fig. 3;

Figure 5 is a partial enlarged view of B-B of Figure 4;

Figure 6 is a partial enlarged view of C-C in Figure 4.

Detailed ways:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figures 1 to 6, the utility model is a new type of DC brushless motor structure, including a rotor assembly 1, a stator core 2, an end insulation 3, a casing 4, an end cover 5 and a circuit Plate 6, the stator core 2 is nested outside the rotor assembly 1, the end insulation 3 is installed at both ends of the stator core 2, the stator core 2 is connected with the casing 4, and the end cover 5 is installed on the casing 4, it It also includes a tray 7, the tray 7 is supported on the end insulation 3, the circuit board 6 is embedded in the groove 71 opened on the tray 7, the groove 71 is filled with the potting material 8, and the potting material 8 covers part or all of the circuit board 6 .

Embodiment 2: On the basis of Embodiment 1, the following technical features are added: the end insulation 3 is provided with a support plate 31, and the end surface of the support plate 31 protrudes from the end positioning column 32, and the end positioning column 32 forms with the support plate 31. The end step 33, the bottom surface of the groove 71 of the tray 7 is provided with a positioning through hole 72, on the outside of the positioning through hole 72, the groove 71 of the tray 7 protrudes downwards with a lower protrusion 73, and the lower protrusion 73 is provided with a protrusion The step 730 and the bump step 730 cooperate with the end step 33 , the bump 73 is supported on the support plate 31 , and the end positioning column 32 is inserted into the circuit board 6 through the positioning through hole 72 .

Embodiment 3: On the basis of Embodiment 2, the following technical features are added: the support block 74 protrudes from the bottom surface of the groove 71 of the tray 7, the end surface of the support block 74 protrudes from the tray positioning column 740, and the circuit board 6 is supported on the support block 74 Above, the tray positioning column 740 is embedded in the circuit board 6 .

Embodiment 4: On the basis of Embodiment 1 or Embodiment 2 or Embodiment 3, the following technical features are added: the inner wall surface of the casing 4 is provided with a casing step 41, and a supporting boss 42 protrudes from the step 41, and the supporting convex The platform 42 is provided with a threaded hole 420, and the outer wall surface of the tray 7 protrudes from the lug 75. The lug 75 is provided with a mounting hole 750. The lug 75 is supported on the support boss 42, and the screw is screwed into the threaded hole through the mounting hole 750. In 420 miles, pallet 7 is locked.

Embodiment 5: On the basis of Embodiment 4, the following technical features are added: the screw is screwed into the step hole 410 on the casing step 41 through the end cover 5 to lock the end cover 5 on the casing 4 .

Embodiment 6: On the basis of Embodiment 1, the following technical features are added: the tray 7 protrudes downward from the sheath 76, and the Hall element 61 installed on the circuit board 6 is embedded in the sheath 76 and covered by the sheath 76, The Hall element 61 is located outside the permanent magnet 11 on the rotor assembly 1 .

Embodiment 7: On the basis of Embodiment 1, the following technical features are added: power components 62 are installed on the circuit board 6, and the power components 62 are closely attached to the inner side of the end cover 5, above the power components 62, at the end A plurality of cooling ribs 51 are arranged on the top surface of the cover 5 .

Embodiment 8: On the basis of Embodiment 1, the following technical features are added: a tray through hole 77 is provided on the inner side of the groove 71 and on the tray 7 .

Embodiment 9: On the basis of Embodiment 2, the following technical features are added: an annular upper bump 78 protrudes upward from the groove 71 of the tray 7 outside the positioning through hole 72 , and the upper bump 78 is embedded in the circuit board 6 .

Embodiment 10: On the basis of Embodiment 1, the following technical features are added: the casing 4 and the end cover 5 are formed by cast aluminum.

Since the present application is in the mechanical field, those of ordinary skill in the art can clearly associate: Embodiment 2, Embodiment 3, Embodiment 4, Embodiment 5, Embodiment 6, Embodiment 7, Embodiment 8, Embodiment 9 and Embodiment 10 The mentioned added technical features can be combined freely and combined with the technical solution of Embodiment 1 to form a new technical solution.

The casing 4 of the utility model is formed by casting aluminum. One end of the casing 4 is provided with an opening, and the other end is provided with a bearing chamber for installing bearings. The stator core 2 is connected with the casing 4, and the end insulation 3 is installed on the stator core. 2 At both ends, add a tray 7 at the same time, the tray 7 is supported on the end insulation 3, the circuit board 6 is embedded in the groove 71 opened on the tray 7, the groove 71 is filled with the potting material 8, and the potting material 8 covers the part Or all circuit boards 6 and end caps 5 are installed on the casing 4 to seal the casing 4, which has simple structure, low cost, good reliability, and good sealing and waterproof effect.

Claims (10)

1. A new type of DC brushless motor structure, including rotor assembly (1), stator core (2), end insulation (3), casing (4), end cover (5) and circuit board (6), The stator core (2) is nested outside the rotor assembly (1), the end insulation (3) is installed at both ends of the stator core (2), the stator core (2) is connected with the casing (4), and the end cover (5) Installed on the casing (4), characterized in that it also includes a tray (7), the tray (7) is supported on the end insulation (3), and the circuit board (6) is embedded in the tray (7) and opened In the groove (71), the groove (71) is filled with potting material (8), and the potting material (8) covers part or all of the circuit board (6). 2. A new type of DC brushless motor structure according to claim 1, characterized in that: the end insulation (3) is provided with a support plate (31), and the end surface of the support plate (31) protrudes from the end positioning column (32), the end positioning column (32) and the support plate (31) form the end step (33), and the positioning through hole (72) is opened on the bottom surface of the groove (71) of the tray (7), and the positioning through hole ( 72) On the outside, the groove (71) of the tray (7) protrudes downward from the lower bump (73), and the lower bump (73) is provided with a bump step (730), and the bump step (730) and the end The steps (33) cooperate with each other, the bump (73) is supported on the support plate (31), and the end positioning column (32) passes through the positioning through hole (72) and is embedded in the circuit board (6). 3. A new DC brushless motor structure according to claim 2, characterized in that: the support block (74) protrudes from the bottom surface of the groove (71) of the tray (7), and the end surface of the support block (74) protrudes The tray positioning column (740) is released, the circuit board (6) is supported on the support block (74), and the tray positioning column (740) is embedded in the circuit board (6). 4. A new type of DC brushless motor structure according to claim 1, 2 or 3, characterized in that: a casing step (41) is provided on the inner wall surface of the casing (4), and the step (41) is convex Out of the support boss (42), the support boss (42) is provided with a threaded hole (420), the outer wall of the tray (7) protrudes from the lug (75), and the lug (75) is provided with a mounting hole (750 ), the lug (75) is supported on the support boss (42), and the screw is screwed into the threaded hole (420) through the mounting hole (750) to lock the tray (7). 5. A new type of DC brushless motor structure according to claim 4, characterized in that: the screw is screwed into the step hole (410) on the casing step (41) through the end cover (5) and the end cover (5 ) is locked on the casing (4). 6. A new brushless DC motor structure according to claim 1, characterized in that: the tray (7) protrudes downward from the sheath (76), and the Hall element (61) installed on the circuit board (6) ) embedded in the sheath (76) and covered by the sheath (76), the Hall element (61) is located outside the permanent magnet (11) on the rotor assembly (1). 7. A new type of DC brushless motor structure according to claim 1, characterized in that: power components (62) are installed on the circuit board (6), and the power components (62) are closely attached to the end cover (5 ) on the inner side surface of the power component (62) and on the top surface of the end cover (5) are provided with a number of cooling ribs (51). 8. A novel DC brushless motor structure according to claim 1, characterized in that: a tray through hole (77) is provided on the tray (7) inside the groove (71). 9. A new type of DC brushless motor structure according to claim 2, characterized in that: on the outside of the positioning through hole (72), the groove (71) of the tray (7) protrudes upwards from the annular upper bump ( 78), the upper bump (78) is embedded in the circuit board (6). 10. A novel DC brushless motor structure according to claim 1, characterized in that: the casing (4) and the end cover (5) are cast aluminum.

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