RU2001738C1 - Vibration-protective coupling for percussion tool - Google Patents

Description

the bones of the vibration protection sleeve 1, depending on the applied pressure.

The stiffness of the coupling can be adjusted over a wide range. For securing the tool 4 in the pneumatic impact machine 14, there is an axle box 15. Compressed air is supplied to the machine by a sleeve 16 connected to the pneumatic tool 14 from the side of the handle 17. In the case of undesirability of loosening the tool 4 by selecting a groove, a working tool (chisel) 4 manufactured with a protrusion 18 (see Fig. 6).

The operation of the device is as follows. Before starting work with the vibration-proof clutch, its elastic tube (pneumocylinder) 10 must be filled with compressed air to a predetermined pressure through the spool 11 or through the control valve 12, which, during operation and during storage periods, the vibration-proof clutch loses a part of it air due to the porosity of the elastic tube and due to leaks in the connection.

In the first embodiment, when the vibration-proof clutch has a spool 11 at the end of the ductile tube (see Fig. 4), charging is performed between cycles of operation, and the air sleeve 13 is disconnected from the clutch after charging. In the second embodiment, the elastic sleeve of the sleeve is connected to the pressure reducing valve 12 (see FIG. 5), the air sleeve 13 used to recharge the sleeve 1 is not disconnected from it, and the charging of the air spring 10 is carried out continuously throughout the cycle pneumatic tool work. After recharging, the vibration-proof clutch 1 is put on the tool 4, after which the latter is inserted into the axle box 15 of the pneumatic impact machine 14.

The vibration damping clutch operates on the principle of free sliding in the axial direction around a stable equilibrium position. In this case, the slip keys 8, mounted with the help of flanges 5 on the ends of the spring sleeve 3 and included in the grooves 9 of the working tool 4 or reaching the protrusion 18 (if the tool 4 with a protrusion), limit the axial movement of the tool and contribute to its holding in shock machine.

When working with a percussion machine 14, the operator holds the handle 17 with his right hand and holds and guides the tool 4 with the vibration protection sleeve 1. With his left hand, both operator hands are therefore protected from vibration.

For example, a pneumatic chopper during operation develops an impact energy of 20 J and a high frequency reaches 20 Hz. but this generates the entire frequency spectrum of the excited vibration. As indicated above, the high-frequency oscillations are damped by the spring sleeve, the middle and low frequencies of the spectrum at the interface between the spring and the elastic tube filled with air, and the air pressure in the tube is set so as to provide the necessary rigidity of the coupling for the ruble hammer. To maintain the initial stiffness when changing the feed force of the tool, a stiffener is used, which is an elastic cabin in a vibration-proof coupling filled with compressed air of a given pressure. A predetermined pressure value is provided by a control valve (pressure reducer).

The proposed vibration-protective coupling can be mounted not only on a working tool (chisel), but also on a handle (s), or on the body of shock, impact-rotational and rotary manual pneumatic machines with the possibility of axial movement, with or without axial acceleration axial movement, in the absence of axial accelerations, providing effective protection of both hands of the operator from vibration.

The proposed vibration-proof clutch is simple and technologically advanced to manufacture, cheap, does not require expensive materials or sophisticated equipment to manufacture, which allows it to be manufactured directly at the factory. The vibration-proof clutch is simple and reliable in operation, provides operator safety and high efficiency of its protection against vibration in a wide range of vibrational vibrations, for all types of hand and portable machines. At the same time, the weatherproof coupling provides a reduction in operator fatigue, an increase in labor productivity and the quality of work performed. The use of the said vibration-proof clutch improves the ergonomic characteristics of hand-held machines and is a reliable protection of the operator of these machines (especially chipping hammers) from vibration.

(56) 1. USSR author's certificate G 1178316, cl. B 25 O 17/24, 1985.. 2. Copyright certificate of the USSR G 782991, cl. B 25 D 17/24. 1979.

Claims (2)

1. VIBRATION PROTECTIVE COUPLING FOR A SHOCKING TOOL, comprising a spring sleeve mounted on the tool and a stiffener, made in the form of an elastic tube, wound along a helical line to a spring sleeve, muffled from one end, and connected to the pneumatic network through a control valve, which differs that, in order to reduce vibrations, vibration protection I / the coupling is mounted axially movable along the tool, it is provided with sliding keys, and flanges are made at the ends of the spring sleeve to which the latter are attached to interact with mating grooves or flats on the tool. 2. The clutch of claim 1, wherein that it is provided with an air supply spool mounted at the open end of the elastic tube. go firm.2 pt / s.5 f.b 17 T6 WITH...