BG66484B1 - Vibration device for hand drill tools with resonance effect - Google Patents

Abstract

The device can be applied for incorporation in hand impact tools, perforators, etc. It includes motor (1) with drive (2) connected to the motor axis (10). A drive piston (4) situated in the common case (5) is attached to the motor axis (10) by means of crank (3) or coupler device. A non-linear elastic element (6) is situated in front of the drive piston (4) connecting the piston to impact element (7), after which an intermediate impact element (8) and operational tool (9) are situated consecutively. The elastic element (6) has a non-linear characteristic. The drive piston (4), the impact element (7) and the intermediate impact element (8) are situated in the common case (5). The drive wheel (4) makes reciprocal movement with frequency "f" of the impacts in the system with one-value relation f = ((с.m)1/2)/(2.tt) to the mass "m" of the impact element (7) and the hardness "с" of the non-linear elastic element (6). The mass of the intermediate element (8) is up to 1:3 in relation to the mass of the operational tool (9).

Description

(54) VIBRATION DEVICE FOR DRILLING HANDSELF ELECTRONIC INSTRUMENTS RESONANCE ACTION

Field of technology

The invention relates to a vibrating device for drilling hand tools with resonant action, which is used in portable percussion drilling machines, perforators and the like.

BACKGROUND OF THE INVENTION

A percussion mechanism is known for electrically portable percussion drilling machines, including a common housing and an oscillating motor to which an outlet nozzle with a socket formed on it is attached / 1 /.

It houses the upper end of a connecting stem, which upper end is shaped as superimposed annular annular elements. The design of the lower end of the connecting stem is similar. The lower annular elements are mounted in a gripping head to which a working tool is attached.

The construction thus described cannot operate in a nonlinear mode of oscillations, which makes it inefficient. It also has a high energy consumption during operation, which is due to the specific design solutions of the impact mechanism.

Technical essence of the invention

The objective of the invention is to provide a vibrating device for drilling hand tools with resonant action, which allows operation in non-linear resonant mode with low energy consumption and high efficiency during operation.

The vibrating device for drilling hand tools with resonant action includes a motor to the axis of which a drive mechanism is attached. A working piston is attached to it, located in a common housing. A working tool is located in front of the common body. According to the invention, a non-linear elastic element is arranged in front of the working piston in the general housing. An impact element is mounted in front of it, and an intermediate element is placed in front of it.

The working piston has the possibility of reciprocating motion with frequency f, which is in a unique ratio f = (cm) l / 2) / (2n), as t is the mass of the impact element, and c is the stiffness of the nonlinear elastic element .

The mass of the intermediate impact element is in a ratio of up to 1: 3 to the mass of the working tool.

An advantage of the vibrating device for drilling power tools with resonant action is that due to the nonlinear elastic element, which has a force-deformation characteristic, the impact element and the intermediate impact element, a nonlinear resonance impact system is created, which guarantees maximum performance. Another advantage is that it significantly reduces energy consumption during operation. It is also an advantage that the vibrating device is very compact and is convenient for installation in all types of hand power tools.

Explanation of the attached figures

Figure 1 is a longitudinal section of the device;

Figure 2 is an exploded perspective view of the device;

Figure 3 is a longitudinal section of the device with a variant solution of the drive by a rocker mechanism;

Figure 4 is a graph of the impact energy (E measured in J) and the speed of movement of the impact element at the time of impact (V measured in m / s) as a function of the reciprocating motion of the working piston with frequency f measured in Hz.

An embodiment of the invention

The vibrating device for drilling hand power tools with resonant action includes a motor 1, to whose axis 10 is driven a drive mechanism 2. To it by means of a crank mechanism 3 is attached a working piston 4. It is located in a common housing 5. In it, in front of the working piston 4 , a nonlinear elastic element 6 is located. An impact element 7 is mounted in front of it, and in the immediate vicinity of it is

66484 Bl an intermediate impact element 8 is located. A working element 9 is placed in front of it. The working piston 4 is capable of reciprocating motion with frequency f. It is in a unique ratio f = (cm) l / 2) / (2n), as m is the mass 5 of the impact element 7, and c is the stiffness of the nonlinear elastic element 6. The mass of the intermediate element 8 is in the ratio up to 1 : 3 relative to the mass of the working tool 9. One variant solution of the construction is to drive the working piston 4 by a rocker mechanism 11.

Use of the invention

The vibrating device for drilling hand power tools with resonant action is applied as follows. During operation, the motor 1 through the drive mechanism 2 and the crank mechanism 3 creates a reciprocating movement of the working piston 4. It in turn acts on the nonlinear elastic element 6, which has a nonlinear force-deformation characteristic. It can be a spring and also a closed gas or fluid. The non-linear elastic element 6 drives the impact element 7, which by striking the intermediate impact element 8 by transmitting its kinetic energy to the working tool 9. The working piston 4 performs reciprocating motion with frequency D. The mass t of the impact element 7, the stiffness with of the nonlinear elastic element 6 and the operating frequency f 'of the impact of the system are in the unambiguous dependence f = (cm) l / 2) / (2n). In this way a maximum speed V of the impact element 7 with impact energy E of the intermediate impact element 8 and the working tool 9 is guaranteed. The intermediate impact element 8 transmits by kinetic energy the kinetic energy of the working tool 9. The working piston 4 performs sinusoidal motion way, the maximum impact energy between the intermediate impactor 8 and the working tool 9 is guaranteed. The ratio between the mass of the intermediate impact element 8 is up to 1: 3 to the mass of the working tool 9 and guarantees an effective rebound after the impact of the intermediate impact element 8 , while maintaining the stability of the resonant mode of operation.

Claims (3)

A vibrating device for drilling hand-held power tools with resonant action, comprising a motor to the axis of which a drive mechanism is attached, to which a working piston is attached, located in a common housing, and in its front part there is a working tool, characterized in that in the common housing (5), in front of the working piston (4) there is a non-linear elastic element (6), in front of which an impact element (7) is mounted, and in the immediate vicinity there is an intermediate impact element (8). Vibrating device for drilling hand power tools with resonant action according to claim 1, characterized in that the working piston (4) is capable of reciprocating motion with a frequency D, which is in a unique ratio f = (cm) l / 2) / (2.n), where m is the mass of the impact element (7), and c is the stiffness of the nonlinear elastic element (6). Vibrating device for drilling hand power tools with resonant action according to claim 1, characterized in that the mass of the intermediate impact element (8) is in a ratio of up to 1: 3 to the mass of the working tool (9).