SU1197829A1 - Hand-operated power tool - Google Patents

Abstract

MANUAL TOOL WITH A POWER DRIVE, comprising a case, an electric motor mounted on it, mounted in the housing and connected to the electric motor gearbox with the output shaft and interacting with the latter, the working element, different from 4jo, in order to simplify the design, the working body is designed as a curved at an obtuse angle of a composite rod, one section of which is cylindrical and the other in the form of a prism, an eccentric cylindrical hole is made at the end of the output shaft, in which a cylindrical section is located , and the housing on the shaft side has a removable prismatic cover, covering the area in the form of a prism. (Oh oh 00 th

Description

This invention relates to portable hand tools with electric drive and can be used in the mining, construction and other industries.

The purpose of the invention is to simplify the design.

FIG. 1 shows a power tool with a power drive, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The power-driven hand tool comprises a housing 1, an electric motor 2 mounted in the housing 1, and a gearbox 3 connected to the electric motor 2 with an output shaft 4. The working member 5 is made in the form of a rod bent at an obtuse angle, one section 6 of which is cylindrical, and the other 7 - prismatic. In the output shaft 4 with eccentricity E there is a blind cylindrical hole 8, depth h. The housing 1 has a removable power prismatic housing 9, in which the lubricators 10 are installed. The working member 5 has channels II and 12 for supplying lubricant, and its cylindrical section 6 is installed in the hole 8 of the output shaft 4. At the same time, the prismatic housing 9 encloses the prismatic section 7 rod 5, and

the faces of the casing 9 serve as guides for the prismatic section 7, and along the X-X axis between the latter and the casing 9 there is a gap equal to two eccentricities E. The output shaft 4 is rotated

 the electric motor 2, while the working body 5 makes a complex plane-parallel movement, with the tip of its prismatic section 7 moving reciprocally relative to the casing 9 and describes in space an ellipse, the major axis of which is equal to the magnitude of the working stroke H determined by the formula:

H 2E sina

where E is the eccentricity between the axes of the output 5 of the noto shaft 5 and the cylindrical section 6, and is the angle between the axes of the cylindrical 6 and the prismatic 7 sections, and its small axis is equal to two eccentricities E.

In this case the condition must be fulfilled:

20

where H is the stroke of the working body 5;

h - the depth of the hole 8.

To reduce friction through channels 11

and 12 is lubricated. If necessary

cn in the casing 9, you can replace the working body 5, and install instead on the shaft 4,

for example, a conventional drill chuck.

5-B turned

FIG. five

Claims (1)

MANUAL TOOL WITH POWER DRIVE, 'comprising a housing, an electric motor mounted on it, a gear reducer with an output shaft and a working body interacting with the latter, characterized in that, in order to simplify the design, the working body is made in the form of a composite rod bent at an obtuse angle, one a section of which is cylindrical, and the other in the form of a prism, an eccentric cylindrical hole is made in the end of the output shaft, in which a cylindrical section is located, and the housing on the shaft side has a removable prism The casing covering the area in the form of fi. 7 m QO Yu C ©>