Spray gun
AssigneePositec Power Tools (Suzhou) Co., Ltd.
InventorsYimin Sun, Shisong Zhang, Hongfeng Zhong
Life of this patent
Estimating the term…
Abstract
A spray gun includes a first shell, a fan module, a sleeve, a nozzle assembly and a spray bar assembly. The fan module includes a brushless motor. The sleeve is formed or mounted on the first shell. The nozzle assembly is disposed at an end of the sleeve. The spray bar assembly is received in the sleeve and configured to move along a longitudinal axis of the spray bar assembly to open or close the liquid outlet. The fan module has a maximum outer diameter D1 between 30 mm and 80 mm, and a rotation axis of the brushless motor is parallel to or coincident with the longitudinal axis of the spray bar assembly. In this way, the spray gun is more compact and consistent with ergonomics.
Claims16
A spray gun for atomizing a liquid by an airflow, comprising:
- a first shell;
- a fan module, received in the first shell, for generating the airflow, the fan module comprising a brushless motor and a fan driven to rotate by the brushless motor;
- a sleeve, formed or mounted on the first shell;
- a nozzle assembly, disposed at an end of the sleeve away from the fan module and provided with a liquid outlet;
- a spray bar assembly, received in the sleeve and configured to move along a longitudinal axis of the spray bar assembly to open or close the liquid outlet, and
- a handle for an operator to hold,
- wherein the fan module has a maximum outer diameter D1 between 30 mm and 80 mm, and a rotation axis of the brushless motor is parallel to or coincident with the longitudinal axis of the spray bar assembly,
- in a case that the maximum outer diameter D1 is more than or equal to 30 mm and less than or equal to 45 mm, the rotation axis of the brushless motor is coincident with the longitudinal axis of the spray bar assembly;
- or
- in a case that the maximum outer diameter D1 is greater than 45 mm and less than or equal to 80 mm, the rotation axis of the brushless motor is parallel to the longitudinal axis of the spray bar assembly at a distance L1 satisfying (D1−45)/2+2.5 mm≤L1≤20 mm, the rotation axis of the brushless motor is further away from the handle than the longitudinal axis of the spray bar assembly in a direction perpendicular to the longitudinal axis.
A spray gun for atomizing a liquid by an airflow, comprising:
- a first shell;
- a fan module, received in the first shell, for generating the airflow, the fan module comprising a brushless motor and a fan driven to rotate by the brushless motor;
- a sleeve, formed or mounted on the first shell;
- a nozzle assembly, disposed at an end of the sleeve away from the fan module and provided with a liquid outlet;
- and
- a spray bar assembly, received in the sleeve and configured to move along a longitudinal axis of the spray bar assembly to open or close the liquid outlet,
- wherein the fan module has a maximum outer diameter D1 between 30 mm and 80 mm, and a rotation axis of the brushless motor is parallel to or coincident with the longitudinal axis of the spray bar assembly,
- wherein the spray gun further comprises an air pressure chamber radially supported in the first shell, the fan module is received in the air pressure chamber,
- wherein the fan module further comprises a fan shell;
- the fan and the brushless motor are sequentially arranged in the fan shell in a movement direction of the airflow;
- the fan shell is provided with an air inlet ring cover and an air outlet;
- when the fan rotates, the airflow enters the fan shell from the air inlet ring cover and flows from the air outlet to the air pressure chamber.
Dependencies are inferred from the claim text.