RU2226462C1 - Manually driven impact wrench - Google Patents

Abstract

FIELD: devices for screwing nuts on and off. SUBSTANCE: impact wrench includes reduction gear, spindle, handle, clutch, strut mounted in housing of reduction gear and changeable nozzles. Reduction gear is double-stage one. Outlet shaft of reduction gear has hexahedral end head and it serves as spindle. Clutch is in the form of separate cam mechanism. Strut is secured by its lower end to housing of reduction gear coaxially relative to inlet shaft of reduction gear. Inlet shaft of reduction gear is mounted inside strut in rolling bearing assemblies and it has driving pinion in one end and handle on other end. Hinged support is mounted on housing of reduction gear; said support has member for fixing it in its upper position. Above mentioned changeable nozzles designed for introducing inside spindle are fixed by means of latch. EFFECT: enhanced operational reliability of nut wrench. 5 dwg

Description

The invention is intended to eliminate defects in rail tracks. It can be used in transport engineering, in the construction and current maintenance of the railway track.

A device [1, 2] is known that implements the process of tightening and loosening nuts for butt terminal and embedded bolts, for example, for all types of rails with current maintenance, track repairs and laying of railway lines. It contains a trolley designed to transport the device on a rail, including a frame, rollers and two supports, a suspension made in the form of a hinged parallelogram formed by a column worn on a vertical rack of the trolley, handles designed to control the device and a gear motor, including includes an electric motor, bevel gear and shock-rotational mechanism.

The disadvantage of such a device is its complexity. In the presence of a gear motor, the productivity of the device increases, but in certain cases the organization of power supply presents significant difficulties. In addition, in a single repair operation, when it is necessary to overcome significant distances from one repair location to another, using a power tool may not be practical. The device does not have a drilling function.

The closest to the technical solution is the device [3, 4], containing a gearbox of three vertical shafts with cylindrical gears mounted on them, a handle, a spindle mounted on the gearbox shaft, a coupling located inside the gearbox, a rack and interchangeable nozzles.

The disadvantage of the device [3, 4], adopted as a prototype, is its complexity, as well as the fact that the torque necessary for unscrewing rusty and frozen fasteners can only be carried out using an electric motor; manually, such a moment is not developed by a person of average physical data can. In addition, the prototype is dry most of the disadvantages of the analogue [1, 2] above.

The purpose of the proposed device is to simplify it, increase reliability indicators due to a simpler design and the lack of an electric drive.

This goal is achieved by the fact that in the device containing the gearbox, spindle, handles, clutch, a rack mounted on the housing, and replaceable nozzles, the gearbox is made two-stage, the output shaft with a hexagonal socket head, which is the output shaft of the gearbox, acts as a spindle, the coupling is made in the form of a separate cam mechanism, the rack is fixed with the lower end on the gearbox housing coaxially with the input shaft, the input shaft is mounted inside the rack on rolling bearings with a pinion gear on one end and a handle on the other and a hinged support is introduced, which is fastened to the gear housing with a lock for the upper position of the said support, interchangeable nozzles inserted into the spindle, and a latch fixing interchangeable nozzles.

In Fig.1 shows a General view of the device, in Fig.2 - a replaceable nozzle for the screw head and a replaceable nozzle for a drill cone, in Fig.3 - the operation of twisting (unscrewing) the nut of the terminal bolt, in Fig.4 - the operation of twisting (unscrewing) screw, figure 5 - operation of drilling holes in a wooden sleepers.

The device (figure 1) contains a two-stage cylindrical gearbox 1, on top of the gearbox housing coaxially to the input shaft 2, a rack 3 is installed in the form of a pipe; inside the rack 3, an input shaft 2 is installed on the rolling bearings with a pinion gear 4 at the lower end and a handle 5 at the upper end; at the bottom of the gearbox 1 is a spindle 6 with a hexagonal socket head, which is the output shaft of the gearbox 1 and the working body at the same time; a latch 7 is inserted into the holes of the spindle body 6; a hinged support 8 is installed on the gearbox housing 1, having two working positions: upper and lower; in the upper position, the hinged support 8 is held by a latch 9, mounted on a rack 3; in the upper part of the strut 3 there is a cam clutch 10 and a control handle 11 with a stopper 12 for fixing the control handle 11 in the upper position. Replaceable nozzle for the screw head 13 (figure 2) has an external cylindrical 14 and hexagonal 15 surface, similar to the inner surfaces of the spindle 6; for fixing the replacement nozzle under the head of the screws 13 in the spindle 6 with a latch 7 at the upper end of the nozzle 13, an entry cone 16 and a groove 17 are provided, the inner surface of the nozzle 13 is square and repeats the dimensions of the screw head.

Replaceable nozzle for the cone of the drill 19 (figure 2) has an outer cylindrical 20 and hexagonal 21 surface, similar to the inner surfaces of the spindle 6; for fixing the interchangeable nozzle 19 in the spindle 6 with a latch 7 at the upper end of the nozzle 19, an inlet cone 22 and a groove 23 are provided; the inner surface 24 of the nozzle 19 has a conical shape and repeats the dimensions of the drill cone.

During operation, the following operations are performed:

tightening (loosening) the nuts of the terminal bolt (Fig.3) according to the following scheme: put the spindle 6 on the nut; the desired spindle speed is selected, fast speed (low torque) is achieved by moving the control knob 11 up, turning on the cam clutch 10 and fixing the hinged support 8 in the upper position, slow speed (high torque is achieved by moving the control knob 11 down, turning on the cam clutch 10 and lowering the hinged support 8 onto the rail head; by turning the handle 5, the nut of the terminal bolt is twisted (unscrewed); the screw is screwed (unscrewed) into the wooden tie (Fig. 4); inserted into the spindle 6 the interchangeable nozzle for the screw head 13 is fixed with a latch 7; the spindle 6 with the nozzle 13 is put on the screw head; the desired spindle rotation speed is selected, fast speed (low torque) is achieved by moving the control handle 11 up, turning on the cam clutch 10 and locking the tilt support 8 in the upper position, slow speed (high torque) is achieved by moving the control knob 11 down, turning on the cam clutch 10, and lowering the hinged support 8 to the rail head; by turning the handle 5, a screw is twisted (unscrewed).

Drilling holes in a wooden tie (Fig. 5) is carried out in the following sequence: a drill of the desired diameter is inserted into the interchangeable nozzle under the drill cone 19; a replaceable nozzle 19 with a drill is inserted into the spindle 6 and fixed with a latch 7; set the fast speed of rotation of the spindle 6 with the fixation of the control handle 11 at the top of the stopper 12; the hinged support 8 is fixed in the upper position; the device is installed on a wooden sleeper in the right place; the rotation of the handle 5 is drilling wooden sleepers.

The authors tested a prototype with the following parameters and characteristics: the force on the handle 5-15 kgf, the torque on the spindle 6 at a fast speed of rotation - 4 kgf • m, the torque on the spindle 6 at a slow speed of rotation - 60 kgf • m, overall dimensions 360 × 200 × 1150 mm, weight - 9 kg.

Thus, the proposed device is simpler when performing the same functions as the prototype.

The information provided indicates the possibility of its implementation.

Sources of information

1. Key traveling universal KPU. Mechanized travel tool. Product Catalog. Kalugatransmash, 2002, p.13.

2. Key traveling universal KPU. Technical description and instruction manual. Kaluga Transport Engineering Plant. - Kaluga: Polygraphist, 1989, 16 p.

3. Screwdriver ШВ2М. Mechanized travel tool. Product Catalog, Kalugatransmash, 2002, p.13.

4. Machine for screwing nuts and screws of rail fastenings ШВ2М. User's manual. Kalugatransmash OJSC, 1989, 16 pp.

Claims (1)

A hand-operated nutrunner containing a gearbox, spindle, handle, clutch, stand mounted on the gearbox housing, and interchangeable nozzles, characterized in that the gearbox is made in two stages, the output shaft of the gearbox is made with a hexagonal socket head and acts as a spindle, the coupling is made in the form of a separate cam mechanism, the rack is fixed with the lower end on the gear housing coaxially with the input shaft of the gear installed inside the rack on rolling bearings with a pinion gear at one end and a handle on the other , Administered flap support which is fastened to the gear housing, with its upper locking position and a latch, wherein the replaceable nozzle intended for insertion into the spindle, fixed latch.

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