Dust collection type grinder

Abstract

The invention provides a dust collection type grinder, which comprises a shell, a motor, a dust collection mechanism and an air injection mechanism. Compressed air is input to drive the motor to rotate and further drive a grinding disc to rotate; meanwhile, the input compressed air drives peripheral airflow, and the peripheral air, dust and chippings are sucked to achieve a dust collection effect, wherein before the compressed air enters to drive the motor to rotate, the compressed air is divided in advance and the airflow is driven to collect dust, so that the betterdust collection effect is achieved, the influence on the rotational speed of the motor can be avoided or reduced, and the excellent use effect is achieved.

Description

Technical field [0001] The invention relates to a dust-collecting grinder, belonging to the technical field of hand-held grinders. Background technique [0002] A grinder is a tool that rotates or moves the polishing sheet to polish the surface of the workpiece. Among the conventional grinders, some grinders use a motor to rotate the polishing sheet for polishing, and at the same time, it can use the air jet discharged by the motor to drive the airflow The dust or debris generated when grinding the workpiece is sucked in and collected at the back end of the pipeline to avoid affecting the working environment. For example, the US 6,004,197 patent belongs to this type of grinding machine. [0003] However, such grinders with additional dust collection function are prone to problems such as low motor speed or poor dust collection effect. The problem is that in this type of grinder, the exhaust gas jet needs to be used to drive the airflow. , If you want to obtain a strong vacuum suct...

AI Technical Summary

Problems solved by technology

[0003] However, this type of grinding machine with additional dust collection function is prone to the problem of low motor speed or poor dust collection effect. , if you want to obtain a stronger vacuum suction and improve the dust collection effect, you need to increase the pressure of the motor exhaust port. At this time, the pressure difference between the motor intake port and the exhaust port will be reduced, and the motor speed will be reduced. , causing the horsepower of the grinding machine to drop; relatively, if you want to maintain a high speed and horsepower, you must increase the pressure difference between the motor inlet and exhaust port, and you need to reduce the pressure of the motor exhaust port. At this time Due to the low pressure of the exhaust port, the vacuum suction force of the dust collection will be reduced, resulting in poor dust collection effect. In view of the design defect of the contradictory design of the grinding machine speed and suction for the above dust collection function, it is necessary to improve it.

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