Novel permanent magnet brushless bench drill

Abstract

The invention discloses a novel permanent magnet brushless bench drill, and belongs to the technical field of bench drills. The novel permanent magnet brushless bench drill comprises a bench drill bottom plate, wherein a machine body base is fixedly arranged on the rear side of the top of the bench drill bottom plate, a machine body shell is arranged at the top of the machine body base, a controlpanel for starting and stopping speed regulation is embedded below the side surface of the machine body shell, a lifting sliding table is arranged on the front side wall of the machine body shell, a main shaft lifting handle is arranged above the side surface of the machine body shell, and a permanent magnet brushless motor is fixedly arranged at the upper end of the front side wall of the liftingsliding table; and the bottom power output end of the permanent magnet brushless motor is connected with a bench drill main shaft, a main shaft mounting seat is fixedly arranged at the lower end of the front side wall of the lifting sliding table, a universal clamping table for clamping and machining workpieces is arranged on the front side of the top of the bench drill bottom plate, the universal clamping table is positioned directly below the bench drill main shaft, and the universal clamping table comprises a bench vice and a universal adjusting mechanism arranged at the bottom of the bench vice. The novel permanent magnet brushless bench drill is more energy-saving, efficient, convenient and practical.

Description

technical field [0001] The invention relates to the technical field of bench drills, in particular to a novel permanent magnet brushless bench drill. Background technique [0002] The bench drilling machine is referred to as a bench drill for short. It is a small drilling machine tool that is small in size and easy to operate. It is usually installed on a special workbench. Traditional bench drills generally use AC asynchronous motors as power motors, which are transmitted through tower pulleys so that traditional bench drills have the following shortcomings: [0003] 1. The work of the asynchronous motor is that the rotor winding needs to absorb part of the electric energy from the power grid for excitation, which consumes the power of the power grid. This part of the electric energy is finally consumed by current in the rotor winding. This loss accounts for about 20-30% of the total loss of the motor. It makes The efficiency of the motor is reduced, and the rotor excitati...

AI Technical Summary

Problems solved by technology

In addition, when the starting current is too large, the motor itself will be impacted by excessive electric force. If it is started frequently, there is a danger of overheating the winding.

Therefore, the starting design of asynchronous motors often faces a dilemma

[0005] 3. When the asynchronous motor is working, the rotor winding has current flowing, and this current is completely consumed in the form of heat energy, so a large amount of heat will be generated in the rotor winding, which will increase the temperature of the motor and affect the service life of the motor

[0006] 4. Due to the low power factor of the asynchronous motor, the motor has to absorb a large amount of reactive current from the power grid, resulting in a large amount of reactive current in the power grid, substation equipment and power generation equipment, which in turn reduces the quality factor of the power grid and aggravates the power grid. And gun substation equipment and power generation equipment load

At the same time, reactive current consumes part of the electric energy in the power grid, substation equipment and power generation equipment, resulting in low efficiency of the power grid and affecting the effective use of electric energy

Also due to the low efficiency of asynchronous motors, to meet the output power requirements, it is necessary to absorb more electric energy from the grid, which further increases the loss of electrical energy and increases the load on the grid

[0007] 5. The speed change of the drill floor is realized through the "tower pulley", which can only achieve a limited number of speed adjustments, and the single function greatly limits the use of the bench drill

[0008] 6. Traditional bench drills are generally only equipped with a fixed workpiece clamping table, and the traditional workpiece clamping table can only achieve simple lifting adjustment. If the actual workpiece needs to be drilled on multiple lateral slopes of the workpiece, the operation is difficult.

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