RU223314U1 - HAND ELECTRIC TOOLS - Google Patents

Abstract

The utility model relates to electric machines of impact, impact-rotational and rotational action used in construction. A hand-held electric tool contains a front part of the housing, in which an electric motor and a drive of the working element are located, and a rear part of the housing, equipped with a handle, and between the front part of the housing and the rear part of the housing there is a damping spacer made of a closed ring shape from an elastic material, and the connection of the front and the rear part of the body is spring-loaded, and inclined sections are made on the vertical components of the damping spacer. The technical result of the claimed technical solution is to ensure a reduction in the level of vibrations transmitted to the operator's handle from the working parts of the electric tool due to elastic deformations of individual elements of the device. 2 ill.

Description

The device relates to electric machines of impact, impact-rotational and rotational action used in construction.

During operation of a hammer drill, drill or other electric hand tool, its drive device, impact mechanism and replaceable working tool cause vibrations, which propagate in the form of vibrations in the tool body, mainly in the axial direction. Sanitary rules and labor protection standards strictly limit the time spent working with electric tools depending on certain vibration values. Reducing tool vibration increases the amount of time a tool can be used, thereby increasing operator productivity.

The closest in technical essence is the SDS-Plus Hammer Hammer INTERSKOL P-26/800ER, known, among other things, from publications on the Internet, for example, the publication available at the link https://www.interskol.ru/catalog/setevoj-elektroinstrument /perforatory-sds-plus/perforator-sds-plus-interskol-p-26-800er-interskol. A well-known electric tool contains a housing in which an electric motor and a drive of the working element are located; an operator’s handle is located in the rear part of the housing.

The known device does not provide any means of reducing the level of vibration transmitted to the operator's handle during operation of the electric tool.

The objective of the proposed technical solution is to reduce the level of vibration transmitted to the handle during operation of a hand-held electric tool, without significantly changing its mass and basic geometric characteristics.

The problem is solved by using a hand-held electric tool, characterized in that it contains a front part of the housing in which an electric motor and a drive of the working element are located, and a rear part of the housing equipped with a handle, while between the front part of the housing and the rear part of the housing there is a damping spacer made of a closed loop. ring-shaped made of elastic material; the connection between the front and rear parts of the housing is spring-loaded; There are inclined sections on the vertical elements of the damping spacer.

The essence of the technical solution is illustrated by drawings, where in FIG. 1 - hand-held electric tool, in FIG. 2 - assembly diagram of a hand-held electric tool.

In fig. 1 and fig. 2 shows: hand-held electric tool 1, front part 2 of the body, rear part 3 of the body, handle 4, damping spacer 5, springs 6, socket 7, threaded fastener 8.

The hand-held electric tool is designed as follows.

Tool 1 contains front 2 and rear 3 body parts. During operation of the tool 1, the rear part 3 of the body is located closer to the operator than the front part 2. The rear part 3 of the body of the tool 1 is equipped with a handle 4. The handle 4 may contain controls for the operating modes of the tool 1 and a device for turning it on/off. In the front part 2 of the housing there is an electric motor and a drive of the working body of the tool 1. The electric motor and the drive of the working body of the tool 1 are the main sources of vibration. Optionally, on the outer surface of the front part 2 of the body there are controls for the operating modes of the tool 1. Between the front part 2 of the body and the rear part 3 of the body there is a damping spacer 5. The spacer 5 is made of elastic material. The spacer 5 can be made of an elastomeric material, for example rubber. Optionally, the damping spacer 5 is made in the form of a one-piece, one-piece part of a closed ring-shaped shape. The damping spacer 5 can have either a constant or variable cross-section. The cross-sectional profile of the spacer 5 can be made in a simple geometric shape, for example, in the shape of a rectangle. The cross-sectional profile of the spacer 5 can have a complex geometric shape, for example, contain alternating protrusions and depressions of various configurations. Spacer 5 can be oriented perpendicular to the axis of the replaceable working tool. Optionally, spacer 5 is oriented at an angle to the axis of the replaceable working tool. Making the spacer 5 inclined relative to the axis of the tool allows you to increase the contact surface area between the spacer 5 and the front 2 and rear 3 parts of the body. Optionally, inclined sections are made on the vertical elements of the damping spacer 5. Sloping sections may have a stepped, wavy or other shape. Making 5 inclined sections on the vertical components of the spacer makes it possible to increase the contact surface area between the spacer 5 and the front 2 and rear 3 parts of the housing. Increasing the contact area between the spacer 5 and the front 2 and rear 3 parts of the housing increases the efficiency of vibration damping. The front part 2 and the rear part 3 of the housing contain coaxial, reciprocally oriented sockets 7, intended for installing cylindrical springs 6. The depth of the sockets 7 and the length of the springs 6 are selected in such a way that the springs 6 are in a partially compressed state after assembly of the tool 1. The connection of the front 2 and rear 3 parts of the body is made by any method known from the prior art, ensuring reliability of the connection under all possible operating modes of the tool 1. The connection of the front 2 and rear 3 parts of the body can be made using threaded fasteners 8.

Hand-held electric tools are used as follows.

A tool corresponding to the task being solved is installed in the clamping chuck. Using the controls located on the outer surfaces of the front 2 and rear 3 parts of the body, the required operating modes of tool 1 are set. Hand tool 1 is connected to power from the mains or a battery is connected to it. The replacement tool is pressed by the working part to the surface being processed. The electric motor is turned on and the planned technological operations are carried out, for example, drilling holes.

During operation of the electric hand tool 1, its drive device, impact mechanism and replaceable working tool cause vibrations, which propagate in the form of vibrations in the front part 2 of the housing. Springs 6, located between the front 2 and rear 3 parts of the housing, under the influence of vibration loads begin to alternately compress and stretch, thus utilizing a significant part of the mechanical energy. The damping spacer 5, under the influence of vibration loads, undergoes elastic deformations, dampening the vibrations of the front part 2 of the housing due to the work performed.

The use of cylindrical springs 6 and a damping spacer 5 located in the area of connection between the front 2 and rear 3 parts of the tool body 1 can significantly reduce the level of vibrations transmitted from the drive device and the impact mechanism to the operator's handle 4. The design of the ring-shaped damping spacer 5 and the small overall dimensions of the springs 6 make it possible to reduce the level of vibration without significant changes in the mass and basic geometric characteristics of the tool 1. The implementation of inclined sections on the vertical generatrices of the spacer 5 and its orientation at an angle to the axis of the replaceable tool increases the contact surface area between spacer 5 and front 2 and rear 3 parts of the housing, which, in turn, increases the efficiency of vibration damping. Being an alternative to known electric tools, the claimed device expands the arsenal of devices designed for impact, impact-rotational and rotational action.

The technical result of the claimed technical solution is to ensure a reduction in the level of vibrations transmitted to the operator's handle from the working parts of the electric tool due to elastic deformations of individual elements of the device. The technical result is achieved by means of a hand-held electric tool, characterized in that it contains a front part of the housing, in which an electric motor and a drive of the working element are located, and a rear part of the housing, equipped with a handle, while between the front part of the housing and the rear part of the housing there is a damping spacer, made closed ring-shaped made of elastic material; the connection between the front and rear parts of the housing is spring-loaded; There are inclined sections on the vertical elements of the damping spacer.

Claims (1)

A hand-held electric tool containing a front part of the housing, in which the electric motor and the drive of the working element are located, and a rear part of the housing, equipped with a handle, and between the front part of the housing and the rear part of the housing there is a damping spacer made of a closed ring shape from an elastic material, and the connection The front and rear parts of the housing are spring-loaded, characterized in that inclined sections are made on the vertical components of the damping spacer.