Motor having a serial port disposed on a control board received in a screw hole at the bottom of a control box

A motor with a body, including: a housing, a stator, and a rotor; and a controller, including a control box, and a control circuit board. The body is disposed at the top of the motor. The controller is disposed at the bottom of the motor. The control circuit board is disposed in the control box. The control box extends from a side of the housing and forms a platform. A control cable and a power line enter the control box via the platform, and are connected to the control circuit board. The control cable and the power line are sealed via a sealing screw joint and a nut.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a motor.

2. Description of the Related Art

Nowadays, direct current brushless pump motors are widely used in various industries. However, there are several problems with structure of direct current brushless pump motors: 1) since a power line and a control cable extend from side wall of a control box, tightness thereof is not good enough, water drops enter a controller via the cable, and easily cause failure or damage thereof; in addition, leading out wires from the side wall brings great inconvenience for installation and connection; 2) the control circuit board is disposed in the control box, since space is small and the air does not flow therein, heat dissipation is a big problem, since power and heat dissipation of the pump motor are large, temperature raises quickly and becomes very high during operation, which causes that heat is difficult to be dissipated; 3) control functions thereof are comparatively simple, which makes them unable to meet requirements of users; 4) no debug window is disposed on the control box, and connection between a control line or a signal line and a control circuit board is troublesome, parameters of electronic components cannot be adjusted, and an impeller is disposed at a shaft end of the motor, which makes it difficult to fix a rotating shaft during installation, and causes great inconvenience for installation; 5) structure thereof is unreasonable, control thereof is comparatively simple, and no communication interface is left, which makes it inconvenient to communicate with the outside world; and 6) no structure for fastening heat dissipation is disposed at the bottom of the control box.

SUMMARY OF THE INVENTION

In view of the above-described problem, it is an objective of the invention to provide a motor that is capable of addressing the above-mentioned problems.

To achieve the above objectives, in accordance with one embodiment of the invention, provided is a motor, comprising a body, comprising: a housing, a stator, and a rotor, and a controller, comprising a control box, and a control circuit board, the body is disposed at the top of the motor, the controller is disposed at the bottom of the motor, the control circuit board is disposed in the control box, the control box extends from a side of the housing and forms a platform, a control cable and a power line enter the control box via the platform, and are connected to the control circuit board, and the control cable and the power line are sealed via a sealing screw joint and a nut.

In a class of this embodiment, the control circuit board in the controller employs an overlapped structure comprising an upper layer, and a lower layer, the upper layer of the control circuit board is a power board bearing a power conversion circuit, and the lower layer of the control circuit board is a control board bearing a direct current brushless motor control circuit.

In a class of this embodiment, the housing comprises an upper end cover, a metal case with a heat dissipation fin, and a lower end cover, the lower end cover is disposed at the top of the control box and forms a top cover of the control box, the control cable and the power line are connected to the power board via a terminal, and the power board is connected to the control board via the terminal in a manner of insertion.

In a class of this embodiment, an opening is disposed at the bottom of the control box, and operates to receive a LED, the LED is electrically connected to the control board, multiple protruding parts are disposed at the bottom of the control box, and a sealing washer is disposed between the control box and the lower end cover.

In a class of this embodiment, the control cable and the power line are received in the sealing screw joint and the nut, the sealing screw joint is fixed on a lower end cover via the nut, and a lead is in a complete sealing condition.

In a class of this embodiment, a debug window is disposed on side wall or at the bottom of the control box, and a sealing cover is disposed on the debug window.

In a class of this embodiment, a rotary dip switch is disposed at the bottom of the control box, the rotary dip switch is electrically connected to the control board, and the rotary dip switch controls different functions of the motor.

In a class of this embodiment, all heating components on the power board face upwards, a rectifier is tightly attached to a flange on the side wall thereof, an intelligent power module chip IPM on the circuit board is tightly attached to the bottom of the control box, and the control box is made of aluminum.

In a class of this embodiment, a hole is disposed at the bottom of the control box, a serial port disposed on the control board is disposed in the hole, and connected to an external circuit, the hole is a screw hole, and the screw hole is sealed via a plastic nut, and a sealing ring.

Advantages of the invention comprise: the control box extends from the side of the housing and forms the platform, the control cable and the power line enter the control box via the platform, and are electrically connected to the control circuit board, and the control cable and the power line are sealed via a sealing screw joint and a nut, which improves tightness, effectively prevents water drops from enter the controller via the cable, and protects normal operation of the controller; lead-out of the power line and the control cable is reasonable, and brings convenience for wire connection of users.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Further description of the invention will be given below in conjunction with specific embodiments and accompanying drawings.

As shown inFIGS. 1-6, a direct current brushless pump motor of the invention comprises a body disposed at the top thereof, and a controller disposed at the bottom thereof. The body comprises a housing, a stator7, and a rotor8. The housing comprises an upper end cover2, a metal case1with a heat dissipation fin9, and a lower end cover3. The stator7and the rotor8are disposed in the metal case1, and the upper end cover2and the lower end cover3each has a bearing chamber for installing the rotor8.

A debug window23is disposed on side wall or at the bottom of the control box4, a sealing cover12is disposed on the debug window23, the sealing cover12can be opened, and the control circuit board can be exposed for wire connection, adjustment of parameters of electronic components, and fixation of a rotating shaft according to requirements of users for installation and use. A sealing pad24is disposed between the sealing cover12and the control box4.

The controller comprises a control box4, and a control circuit board disposed in the control box4. The control circuit board in the controller employs an overlapped structure comprising an upper layer, and a lower layer, the upper layer of the control circuit board is a power board5bearing a power conversion circuit, and the lower layer of the control circuit board is a control board6bearing a direct current brushless motor control circuit. The lower end cover3is disposed at the top of the control box4whereby forming a top cover for the control box4. Part of the control box4and that of the lower end cover3extend from a side of the metal case and form a platform30, a control cable and a power line17enters the control box via the platform, and is electrically connected to the power board5, and the power board5is connected to the control board6via a terminal16in a manner of insertion. The control cable and the power line17are led out from the platform via a sealing screw joint13and a nut14, the sealing screw joint13is fixed on the lower end cover3via the nut14, and a lead is in a complete sealing condition. A rotary dip switch22is disposed at the bottom of the control box4, the rotary dip switch22is electrically connected to a lower-layer control board6, and the rotary dip switch22controls different functions of the motor. All heating components34on the power board5face upwards, a rectifier28is tightly attached to a flange27on the side wall, an intelligent power module chip15on the control board6is tightly attached to the bottom of the control box4, and the control box is made of aluminum, which features fast heat dissipation. A hole19is disposed at the bottom of the control box4, a serial port32disposed on the control board6is disposed in the hole, and connected to an external circuit33, the hole19is a screw hole, and the screw hole is sealed via a plastic nut21, and a sealing ring20. The upper end cover2and the lower end cover3are aluminum casting end covers, and the metal case1is an expanding aluminum case. An opening is disposed at the bottom of the control box4, and operates to receive a LED31, the LED31is electrically connected to the control board, multiple protruding parts11are disposed at the bottom of the control box4, and a sealing washer18is disposed between the control box4and the lower end cover3, and operates to solve a waterproof and dustproof problem.

If a plastic cover12of the debug window23on the side wall of the control box4is opened, a socket for a power line, and that for a control cable are exposed, and a control cable and a power line17can be connected thereto. The power line17is led out from the sealing screw joint13on the lower end cover3, the sealing screw joint13is fixed on the lower end cover3via the nut14, and the lead is in a complete sealing condition.

A groove25is disposed on one side of the control box4, and another protruding part29is disposed on the control box4, and operates to attach surface of overheated electronic components to the protruding part29whereby speeding up heat dissipation. A mounting foot26is disposed at the bottom of the control box4, and multiple steps extend from inner side wall of the control box4and operate to support the control board6and the power board5. A screw hole is disposed on top end surface of the step, and operates to fix the control board6and the power board5via a screw.