Electric motor and concrete vibrator using the same

Abstract

The invention discloses a motor and a concrete vibrating rod using the same. The brush motor comprises a stator, a rotating shaft and a rotor fixed on the rotating shaft, wherein the rotating shaft is supported by a bearing; a commutator assembly and a corresponding electric brush assembly are arranged on the rotating shaft; the rear end of the motor supports the first bearing of the rotating shaft between the rotor and the commutator assembly to partition the rotor, the commutator assembly and the electric brush assembly in two difference spaces, so that the commutator assembly and the electric brush assembly are positioned in a space outside the first bearing. The invention also discloses a method for improving the working performance of the brush motor and the concrete vibrating rod using the brush motor. The space outside the first bearing is communicated with a pipeline-type cavity in a tail pipe system. The related technical indexes of the vibrating rod can be effectively met without any external equipment.

Description

Technical field [0001] The present invention involves a concrete internal vibrator, especially involving a built -in concrete vibration stick of an electric motor; and an electric motor. Background technique [0002] The concrete vibration pounding rod (hereinafter referred to as the vibration rod), also known as the concrete vibration rod, the internal vibrator of the concrete, inserted concrete vibrator, etc., insert the rod body inside the concrete during work, and directly direct the vibration waves directlyIt is passed on to the concrete and realized when the concrete pouring is built, excluding the bubbles in it, mushing and rusting, and the concrete is densely combined to eliminate the phenomenon of concrete honeycomb and linen to improve its strength and ensure the quality of concrete components.In order to effectively achieve the above goals, according to the relevant technical specifications, the frequency of vibration of concrete vibration sticks is above 167Hz, which ...

AI Technical Summary

Problems solved by technology

Although it solves the above-mentioned defects in ordinary DC motors, because the work of brushless DC motors requires the cooperation of a dedicated brushless DC motor controller and a Hall element that detects the rotational position of the motor, due to the limitations of the rod space and the environment The brushless DC motor controller can only be set outside and connected to the brushless DC motor through cables, while the Hall element must be installed in the rod body and connected to the external brushless DC motor controller. This structure of the entire device is also Consists of two parts (rod body and BLDC motor controller), resulting in similar drawbacks to solutions using AC motors, except that the BLDC motor controller is relatively smaller

On the other hand, large changes in power during construction cause large changes in motor current, and the electronic components of electronic frequency conversion control equipment have relatively poor impact resistance; moreover, Hall elements are relatively fragile and are easily damaged in complex and harsh construction environments. And because the rod body is in a sealed state, the high temperature formed by the operation of the motor will greatly reduce the working life of the Hall element, and even cause damage to it.

At the same time, its cost is relatively high

Based on the above reasons, the vibrating rod adopting this technical scheme has poor practicability, and the actual use value is not high

[0008] To sum up, it can be seen that due to the limitation of the size of the rod body, the space inside the rod body is limited. In the case of no external equipment, it is difficult for the existing related technologies to directly implant the ordinary motor into the vibrator rod body to achieve relevant technical indicators.

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