RU2420373C2 - Hydraulic shears - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cutting appliances to be used in repair, mounting and rescue operations. Proposed shears comprise cutting head, swing clip with fixed blade interacting with moving blade arranged in cutting head case to reciprocate therein and interact with power cylinder, and latch to fasten cutting head case with swing clip. Shears have two axles fitted in cutting head case, parallel each other and perpendicular to cutting plane, that serve to fasten said latch and swing clip to cutting head case. Note here that clip inner side and swing clip are provided with slots to prevent moving blade from turning and displacing in cutting plane.

EFFECT: simplified design, reduced weight and sizes.

4 dwg

Description

The present invention, “Hydraulic scissors” relates to cutting tools intended for use as a cutting tool during repair, installation and rescue operations, for cutting metal ropes and de-energized cables, and, if necessary, metal rods and pipes.

Analogs of the invention “Hydraulic scissors”, in our opinion, are:

- manual scissors with a hydraulic pump from the prospectus "Hydraulic force for industry and technology", firm "ENERPAC", p. 7, exhibition "Neftegaz", October 1994, (fund VPTB), analogue (1);

- cutting set LSH-3, LUKAS from the prospectus "Rescue systems LUKAS, hydraulics and control technology L8.95RT / r, page 4, analogue (2),

- universal hydraulic scissors NUA16, NUA28 from the prospectus "Industrial hydraulic equipment and tools", firm "ENERPRED", January 2003, p. 34, the closest analogue (3).

1. Known manual scissors with a hydraulic pump, consisting of a body, a cutting head, a mechanism for returning the movable knife to its original position, control elements placed in a single unit, while the cutting head is made in the form of a closed loop, and the cutting elements are two knives, one of which movable, and the other fixed, installed in the body of the cutting head with the possibility of oncoming translational movement along rectangular grooves (Cutting tool from the prospectus "Hydraulic force for industry and technology ki ", firms" ENERPAC ", p. 7, exhibition" Neftegaz ", October 1994, (fund VPTB), analogue (1);

2. Known cutting set LSH-3 LUKAS, consisting of a cutting head with an open cutting zone, consisting of a housing and a power cylinder connected to a manual hydraulic pump using a sleeve, while the cutting elements of the head are made in the form of two knives, one of which is movable, and another fixed, installed in the cutting head housing with the possibility of oncoming translational movement along rectangular grooves (LSH-3 LUKAS cutting set from the prospectus "LUKAS rescue systems, hydraulics and control technology L8.95RT / r, page 4), analogue (2) .

3. Known hydraulic scissors NUA16, NUA28 manual with a built-in pump, consisting of a body, a cutting head, a spring mechanism to return the movable knife to its original position, control elements, while all of these structural elements are placed in a single unit, and the cutting head is made in in the form of a closed loop with a hinged latch, while the cutting elements are made in the form of two knives, one of which is movable and the other stationary, installed in the body of the cutting head with the possibility of oncoming on translational movement along rectangular grooves (Cutting tool from the “Industrial Hydraulic Equipment and Tools” prospectus of the company “ENERPRED”, January 2003, p. 34), the closest analogue (3).

Known designs of scissors have a significant drawback, namely, they are difficult to manufacture, since two rectangular grooves are provided in the body of the cutting head for centering the movable knife when moving, moreover, these axes are placed at a greater distance, which increases the dimensions of the tool .

The proposed technical solution is aimed at simplifying the design of the cutting head by eliminating from the design of the head body two rectangular grooves designed to center the movable knife when moving and reducing the size and weight of the structure.

The problem is solved by centering the movable knife with two axes installed in the cutting head housing, the geometrical axes of which are parallel to each other and perpendicular to the cutting plane, while the axes that center the position of the movable knife are fasteners with the housing of the cutting head of the latch and folding bracket, a groove is made on the inside of the latch, and the position of the movable knife from turning and shifting from the cutting plane can be fixed by the grooves of the latch and the folding bracket Only slots hinged bracket.

Conducted patent research did not reveal similar technical solutions, which allows us to conclude about the novelty of the claimed object.

The essence of the proposed technical solution is illustrated by drawings, where:

figure 1 shows a General view of the hydraulic shears, with a closed folding bracket, figure 2 shows a General view of the hydraulic shears with an open folding bracket, Figure 3 shows a General view of the hydraulic shears with a cutaway, Figure 4 shows a section aa figure 3, where:

1 - folding bracket

2 - fixed knife

3 - movable knife

4 - the body of the cutting head,

5 - the piston,

6 - power cylinder

7 - latch

8, 9 - axis

10 - groove latch,

11 - a groove of a folding bracket,

12 - safety cover.

The proposed hydraulic scissors, intended for use as a cutting tool during repair, installation and rescue operations, for cutting metal ropes and de-energized cables, as well as, if necessary, metal rods and pipes, consist of a folding bracket 1, in which a fixed knife 2 is installed, interacting with a movable knife 3, placed in the housing of the cutting head 4 with the possibility of translational movement and interaction with the piston 5 of the power cylinder 6, the latch 7 for I fasten the housing of the cutting head 4 with a folding bracket 1, while centering the position of the movable knife 3 is performed by two axes 8, 9 installed in the housing of the cutting head 4, the geometric axes of which are parallel to each other and perpendicular to the cutting plane, while the axis 8, 9, centering the position of the movable knife 3, are fastening elements with the body of the cutting head 4 of the latch 7 and the folding bracket 1, while on the inner side of the latch 7 there is a groove 10, while fixing the position of the movable knife 3 from the turn and offset from the cutting plane can be carried out by the groove 10 of the latch 7 and the grooves 11 of the folding bracket 1 or only the grooves 11 of the folding bracket 1, while the hydraulic shears from the end of the scissors are closed with a safety cover 12.

The manufacture and assembly of the proposed "hydraulic shears" can be performed, for example, as follows. All metal parts included in the structure can be made, for example, of profiled long products, machined on metal cutting machines. Assembly of hydraulic shears is as follows. At the beginning, individual nodes are assembled, and then the product is assembled from the nodes and set up. After that, the hydraulic shears are ready for operation.

For the manufacture of hydraulic shear parts, the use of special and expensive equipment and materials is not required. Knives can be made, for example, of steel 6HBV3MFS GOST 5950-2000, by hot stamping, followed by machining on metal cutting machines, the body of the cutting head can be made of steel 30HGSL GOST 977-88 by casting, and the piston of the power hydraulic cylinder, for example, turning from a bar on metal-cutting machines made of steel 30HGSA GOST 4543-71.

Main dimensions, parameters and characteristics

- maximum diameter of snack steel rope mm 32 - Environment air - the product must be workable in the range of ambient temperatures, from -40 ° С to + 80 ° С - working fluid Hydronikoil FH51 MIL-H-5606 or AMG-10 GOST 6794-75 - product mass, kg, not more than 3.0 - dimensions, mm 250 × 80 × 60 - designated service life, year 5 - assigned resource, cycles 5000

The proposed design of “Hydraulic Scissors” does not contain two internal rectangular grooves that are difficult to manufacture the cutting head body, designed to center the movable knife when moving, which significantly reduced the cost of manufacturing the cutting head body of the scissors.

In addition, reducing the cost of manufacturing "hydraulic shears" is achieved by increasing the functions performed by the individual parts of the scissors, for example, the centering of the movable knife is performed by two axes installed in the body of the cutting head, while using these same axes the fastening is carried out with the body of the cutting head latches and hinged brackets.

Information sources

1. Manual scissors with a hydraulic pump from the prospectus "Hydraulic force for industry and technology", firm "ENERPAC", p. 7, exhibition "Neftegaz", October 1994, (fund VPTB), analogue (1).

2. Cutting set LSH-3, LUKAS from the prospectus "Rescue systems LUKAS, hydraulics and control technology" L8.95RT / r, page 4, analogue (2).

3. Universal hydraulic scissors NUA16, NUA28 from the prospectus "Industrial hydraulic equipment and tools" of the firm "ENERPRED", January 2003, p. 34, the closest analogue (3).

Claims (1)

Hydraulic scissors containing a cutting head with a housing, a folding bracket with a fixed knife that interacts with a movable knife placed in the cutting head housing with the possibility of translational movement and interaction with the piston of the power cylinder, and a latch for fastening the cutting head housing with a folding bracket the fact that they are equipped with two axes mounted in the housing of the cutting head from the condition of the location of their geometric axes parallel to each other and perpendicular to the plane p zaniya and intended for connection of said latch and a hinged bracket to the housing of the cutting head, wherein the inner side of the latch and hinged bracket formed with grooves for fixing the position of the movable blade from turning and displacement in the cutting plane.

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