Pneumatic tool motor rotor having thrust gain effect

Abstract

The invention discloses a pneumatic tool motor rotor having a thrust gain effect, and includes: a rotor body which includes a circumferential wall and two end faces, the circumferential wall being annularly provided with a plurality of inner grooves at intervals; a plurality of movable blades which are arranged in the inner grooves and can be in a radial telescopic movable state; a power output shaft which is arranged on one of the end faces of the rotor body in a protruding manner; a plurality of recesses for pressurization which are formed on the circumferential wall near the inner grooves in an inward concave form and each of which includes an air guiding face and a pushed pressurizing face, the direction of the pushed pressurizing face and the direction of the movable blades being identical or close, a separating rib edge being formed between the pushed pressurizing face and an adjacent inner groove, and the air guiding face extending outwards from an inner end of the pushed pressurizing face to be connected with the circumferential wall. When the motor rotor is pushed by air pressure in the pneumatic tool, a compression area is increased through the pushed pressurizing faces of the recesses for pressurization, thereby achieving the purpose of effectively increasing operation torsion of the motor rotor on the premise of not changing the overall specification and volume of the motor rotor.

Description

technical field [0001] The invention relates to a partial structure of an air tool; in particular, it refers to an innovative structure of an air tool motor rotor with a thrust gain effect. Background technique [0002] In the structural design of pneumatic tools (such as pneumatic wrench, pneumatic handle, pneumatic screwdriver, etc.), the actuating part is mainly driven by the air pressure introduced by the movable vane set in the motor rotor interval ring in the cylinder, and then drives the motor rotor to move forward. Rotate, and then use the rotation of the motor rotor to further drive the tool end of the air tool (such as the sleeve, the screwdriver head assembly rod, etc.) to rotate to achieve its function. [0003] Since the rotary motion of the motor rotor is achieved by air pressure, the overall structural design of the motor rotor is directly related to the driving torque of the pneumatic tool, which is a crucial technical item. [0004] Looking at the current s...

AI Technical Summary

Problems solved by technology

[0004] Looking at the current structure of pneumatic tools, whether the torque of the driving rotor is good or bad can usually only be determined by optimizing the gas flow path or setting the size of the blade area. However, under the premise that the maximum volume of the rotor is limited , the maximum setting area of ​​the blade is relatively limited, and there is no greater development space and possibility

[0005] Although, some industries also adopt the structural shape design of forming inner grooves that can gather air pressure on the blades of the driving rotor, so as to achieve the effect of boosting the torque of the driving rotor without changing the area of ​​the blades. This structure In practical application experience, it is still found that since the overall area and thickness of the blades driving the rotor are quite limited (Note: this is especially true for small pneumatic tool products), so if the blade structure with relatively limited area and thickness , and then apply material removal design to form the inner groove part with sufficient air pressure accumulation effect, obviously, the structural strength of the blade will be greatly affected, moreover, for the drive rotor that requires increased torque in both forward and reverse directions, It is obvious that the inner grooves must be formed on the opposite side surfaces of the blades. However, since the blades driving the rotor are usually only about 3mm thick, if the inner grooves are to be provided on both sides and still have a sufficient partition wall thickness, The depth of the inner grooves may not be able to achieve sufficient gas-gathering and supercharging effects, so the structure of using blade supercharging is still not perfect and needs to be further considered for evolution.

Images