Combination type shears

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials.

SUBSTANCE: combination type shears include hydraulic cylinder with control unit; two levers having cutters with cutting edges and mounted with possibility of rotation one towards other in common axle. Cutting edges have cutting teeth. Fixing teeth are formed on outer surface of lever ends. Length of cutting edges consists at least of 0.6 of level length. Cutting edges are tapered one to other by angle 40 - 50° relative to cutting line. Cutting teeth have pitch Z = 5 - 8 mm, thickness l1 = (0.2 - 0.25)Z, height h = (0.25 - 035)Z and width of initial land l = 0.8 -1.0 mm. Each tooth is tapered by angle α = 60 - 80° to side of lever rotation axis and it is sharpened by angle β = 25 - 35°. Fixing teeth have pitch 3 - 5 mm, depth 1.0 - 3.0 mm and inclination angle 60 - 80° to side of lever rotation axis. In variant levers end portions are tapered on their outer surface along length of 4 - 10 teeth by angle α1 = 20 - 40°. On inner surface of levers before cutting teeth smooth supporting surface with width 20 - 40 mm is formed.

EFFECT: enhanced efficiency of cutting and drawing apart due to using optimal non-symmetrical configuration of cutting and drawing apart fixing teeth.

2 cl, 4 dwg

 

The present invention relates to the processing of metals by pressure and can be used when cutting sheet, profile, rod-shaped material and different designs of metal, plastic and other materials when carrying out rescue operations and liquidation of consequences of emergency situations (ES).

In the Federal Republic of Germany patent No. 2621249, class. And 62 In 37/00, 1978 known portable device with hydraulic drive, containing two levers pivotally connected to the housing of the cylinder, on one arm of levers mounted working bodies in the form of expanding sponges, other arms of the levers are made with toothed sectors located interoperable with the rack on the piston rod of the hydraulic cylinder.

The disadvantages of this apparatus are insufficient reliability, and low technological capabilities.

It is also known a device with hydraulic drive, containing two levers, one shoulders pivotally mounted on the body of the cylinder is symmetrical about its axis of symmetry, and working bodies in the form of expanding jaws mounted on the free arms of the levers, while the piston rod of the power cylinder pivotally connected with each of the levers by means of corresponding parts (the Federal Republic of Germany patent No. 2319276 And 62 In 37/00 1977). The disadvantages of this device is the fact that obtaining it is possible decompresses efforts in a certain interval disclosure levers with decompresses sponges requires an application to the stock much effort.

Closest to the proposed solution are scissors universal portable (RF patent No. 02116872 from 10.08.98, class B 23 D 17/00, Scissors combined). They consist of a cylinder, two levers carrying the cutting knives, and on the outer surface of the locking teeth, and a control unit, hydraulic cylinder, and the knives are aligned on the levers with the possibility of a counter-rotary motion, each of the knives made in the form of a triangular plate and has a base, the front face to the rear plane of the knife - rear face, the front and rear face, intersecting at an acute angle to form a cutting edge having a cutting trough and the same number of teeth, formed by the intersection of cylindrical surfaces.

However, these scissors relative sizes of the elements of the cutting teeth and number of teeth is not defined and symmetrical configuration of the teeth, formed by the intersection of cylindrical surfaces, is not optimal because it does not counteract the buoyancy force arising during cutting. Not defined configuration of the outer surface of the levers used for extension.

The technical result of the invention "combined Scissors" is to increase the efficiency of cutting and sliding through the use of optimal asymmetric Conf the configuration of the cutting and "pushing out" of teeth.

This is due to the fact that the cutting edges is not less than 0.6 of the length of the levers and beveled toward each other at an angle of 40-50° to the cutting line, the cutting teeth are made in increments of Z=5...8 mm, a thickness of l1=(0,2...0,25) Z, height h=(0,25...0,35)Z and the width of the original site l=0,8...1,0 mm, with each tooth is beveled at an angle α=60...80° in the direction of the axis of rotation of the levers and has an angle sharpening β=25...35°and the locking teeth are made in increments of 3...5 mm depth of 1,0...3.0 mm and with an inclination of 60...80° in the direction of the axis of rotation of the levers and also due to the fact that the ends of the levers on the outer surface of the length 4...10 teeth are beveled α1=20...40°and on the inner surface to the cutting teeth of the levers are provided with a smooth bearing surface width of 20...40 mm

Figure 1 shows a General view of the scissors, figure 2 is a view along arrow a in the handle regulating scissors, figure 3 shows a view along arrow D on the cutting teeth 4 Dan is a view along arrow E in view 3.

Scissors combined (universal) are designed for cutting steel rods (rebar), cutting corners and other profiles, sheet material, cutting and clamping of steel pipes, lifting and holding in a stationary position large objects, extensions of narrow openings, as well as tightening of structural elements using a set of incompatibility is the capacity when carrying out rescue operations in the areas of emergency incidents accidents, disasters, fires, natural disasters, and also during the construction and dismantling works in various industries.

Scissors combined contain two knives 1 lever type, pivotally connected by means of axis with the tubular body 3, which is connected by a threaded connection with the housing of the power cylinder 4. Loose shoulders lever blades through earrings 5 and axis 6 pivotally connected with the rod of the power cylinder.

The working fluid to the power cylinder flows through the spool unit 7, which is associated with two flexible sleeves 8 and 9 with quick polurethane 10.

Limp arm 11, the spool is in the neutral position and the working fluid flowing from the pump through the discharge sleeve 8, freely drained through the valve and drain the sleeve 9 in the tank.

When turning the handle 11 in the direction of the symbol "a" and hold it in this position fluid pressure through the sleeve 8 and the valve will hit the piston cavity hydrocylinder, the rod is moved in the direction of the associated blades, turning closer and do the cutting or cutting.

Upon release of the handle 11, the spool automatically to the neutral position, move the knife stops. When turning the handle 11 in the direction of the character "b" rabotaittech through pressure sleeve 8 and the spool enters the rod cylinder chamber, the rod is moved away from the knives and the knives apart. Upon release of the handle 11, the valve automatically returns to more neutral position, movement of the knives is terminated.

The scissors have a locking valve cut 12 which is triggered automatically upon release of the handle 11 when it is necessary to hold the load in a stationary position.

The hydraulic shears has a relief valve, which eliminates the possibility of increasing the pressure in Stokowski cavity above 80 MPa, in the case where the drain line is mistakenly not connected.

The handle 13 in conjunction with arm 11 provide the ability to manipulate the scissors in space and keep them in a convenient position.

In the initial position the arms are compressed, and their outer ends to form a wedge. In this position, the operator holding the tool to the body and the handle can enter this wedge with the application of a shock load between the surfaces of structures, deformed as a result of an emergency for their primary opening.

The versatility of the scissors is that they ensure the implementation of the five different exposure operations:

1) cutting; 2) the problem; 3) the rise and hold various objects; 4) cross-clamping and the means of pipes; 5) tightening using additional devices. In the first place funktionalanalytischen scissors are cutting operation and cutting, therefore, the cutting edges in the form of the teeth should occupy not less than 60% of the entire length of the levers. With a smaller length of cutting edge performance first, the basic operation is sharply reduced.

It was established experimentally that the cutting edges must be beveled to the line of cut at the angle of 40÷50°in this case, an optimum fit of the cutting plates to each other and favorable cutting conditions.

When cutting and the cutting force occurs, eject the workpiece from the throat of scissors. To counter this force and ensure good bonding of the cutting edge with the object of cutting edge made in the form of repetitive cutting teeth: Z step=5÷8 mm; the thickness of the l10,2-0,25 Z, height h=0,25-0,35Z; width original site 0,8 l÷1,0; mm bevel angle α=60-80°, angle sharpening β=25-35°.

To perform operations unclamping operations of lifting and holding objects used by the outer ends of the levers provided with locking teeth. For these teeth obtained the following optimal parameter ranges: step 3-5 mm; depth of 1.0-3.0 mm; tilt - 60-80°.

On the outer surface of the ends of the levers on the length of 4-10 teeth should be beveled to the angle 20÷40°that provides a more robust implementation of the ends of the levers before you begin.

To perform operations lane is pressing, crushing of structural elements on the inner surface of the leverage provided by a smooth space width up to 20÷40 mm

As an example of execution of the invention are designed scissors with the following parameters of the considered elements. The length of the cutting edge relative to the entire length of the lever 129/192=0,67; a bevel angle of the cutting edge 45°. The parameters of teeth: Z=6.8 mm; the thickness of the edge l - 1.5 mm, the height of the tooth h=2 mm; the width of the source pad l=0.9 mm; α=70°; β=30°. Step locking teeth is 4 mm, depth 1.5 mm, the slope of the 70°and the length 5 of the teeth ends of the levers beveled to angle α130°. On the inner surface of the ends of the levers are provided smooth area width 32 mm

The above parameters of the main working elements of scissors has provided the following technical specifications:

Working pressure80,0 MPa
The maximum force on the ends of the levers25,0 kN
The diameter of the snack bar
reinforced steel25.0 mm
The thickness of the cut sheet steel10.0 mm
The diameter Preimenuj steel pipe60.0 mm
240,0 mm
The weight of the ready-scissors17.2 kg
Dimensions560×315×177 mm
Equipped with hydraulic locks

In one corner of the knife there is a hole for passing the axis of rotation of the knife relative to the housing cylinder, the other one has a hole for passing the rotation axis of the connecting rod associated with the piston rod of the hydraulic cylinder. At the ends of the knives with holes for fastening the tightening elements.

The knives are made of high-strength steel milling and grit-blasted. The thickness of the knife - 16 mm (choice of steel grade and thickness on the analysis of the knives of different companies, according to test results and the results of operation of the scissors rescuers).

At the ends of the knives from the cutting edges are ground for like pipes, deformation profiles and corners.

In the upper end of each lever welded plate 120 mm long and 32 mm wide with a deposited teeth. This part of the knife is intended to expand the narrow openings, lifting, holding stationary objects (due to the hydraulic locks, which do not allow the object to return to its original state). Put on the ground the teeth are designed to expand, rise, hold on the object tool is slid out of the opening. The choice of the configuration and location of the teeth of the pad made according to the results of experiments, tests and results of operation of the scissors rescuers.

Developed configuration of the teeth and the cutting edge of the knife tool allows you to:

- to improve the efficiency of the tool;

to improve implementation and crush cut material cutting edge;

to improve the retention of bias cut material during cutting;

- remove the slip cut material along the length of the cutting edge.

Cut material should not exceed the hardness of the cutting edge, which is 51...53 HRC.

If during cutting there are crushing teeth on the cutting edge of the knives, deformed teeth proshlifovat on planes pairing knives whetstone or cone. Then continue cutting.

1. Scissors combo, containing a cylinder with a control unit, two levers with knives with cutting edges mounted to rotate on a common axis toward each other, the cutting edges are made with cutting teeth, and on the outer surface of the ends of the levers are made locking teeth, wherein the cutting edges are not less than 0.6 of the length of the levers and beveled toward each other at an angle of 40-50° to the cutting line, the cutting teeth are made in increments of Z=5...8 is m, the thickness of the l1=(0,2...0,25)Z, height h=(0,25...0,35)Z and the width of the original site l=0,8...1,0 mm, with each tooth is beveled at an angle α=60...80° in the direction of the axis of rotation of the levers and has an angle sharpening β=25...35°and the locking teeth are made in increments of 3...5 mm, a depth of 1,0...3.0 mm and with an inclination of 60...80° in the direction of the axis of rotation the levers.

2. Combined scissors according to claim 1, characterized in that the ends of the levers on the outer surface of the length 4...10 teeth are beveled α1=20...40°and on the inner surface to the cutting teeth of the levers are provided with a smooth bearing surface width of 20...40 mm



 

Same patents:

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials, tubes.

SUBSTANCE: cutting blade includes hydraulic cylinder, control unit, two cutters mounted with possibility of rotation one towards other in common axle and having shaped cutting edges. Each cutting edge has cutting band tapered by angle 2 - 4° and having width consisting of 8 - 10% of cutter thickness and slope adjacent to said band and formed along remaining thickness of cutter. Each cutting edge has two crescent like cutouts mutually joined through bridge consisting of 10 - 20% of cutter thickness. Radius of inner crescent like cutout consists of 20 - 30% of radius of outer crescent like cutout. Cutting edge in crescent like cutouts is tapered by angle 40 - 50° and in bridge it is tapered by angle 50 - 56°.

EFFECT: enhanced efficiency of cutting due to distributing cutting edge for two crescent-like cutouts and due to using optimum configuration of cutting edge.

5 dwg, 1 ex

Sapper's shears // 2286232

FIELD: hand tools for cutting round, square, hexahedral and other metal shapes; removal of barriers on emergency objects; cutting reinforcement in construction engineering.

SUBSTANCE: proposed shears have pair of powerful levers with holes located symmetrically relative to their center of turn where pair of identical cutting knives are placed; knives have slots for item to be cut and holes for pins of load-bearing articulations. Holes for pins of load-bearing articulations are located on plane of each cutting knife over longitudinal axis symmetrically relative to transversal axis; two holes are made in form of slots (every other hole) oriented perpendicularly relative to common axis of holes. One cutting knife of pair is laid on other one by reverse side, so that holes of one cutting knife of pair is laid on slots of other one.

EFFECT: reduced usage of metal; reduced overall dimensions; increased cutting coefficient; enhanced durability of shears; improved service characteristics.

2 dwg

FIELD: hand-held tools.

SUBSTANCE: scissors have pivotally attached levers adapted for rotation, detachable knives located on levers and equipped with cutting edges, and handles connected with one another and with levers through pivot joint. Each of said knives is made in the form of disk having central opening and openings adapted for forming of pin connection and arranged symmetrically to central opening. All mentioned openings are axially aligned with respect to one another. Recess formed in each disk defines cutting edge and supporting surface extending perpendicular to cutting edge. Cutting edge is made open and is positioned in parallel with and in offset relation relative to axis of disk perpendicular to said axis extending through central opening and openings for forming pin connection. Each of said knives is fixed on lever by means of pins inserted in respective openings within knives, provided that upon bringing of handles together their cutting edges are arranged in overlapping relationship. Pivotal connection of levers for rotation thereof is provided by means of fastening member whose pivotal pin is inserted in said openings provided in each lever and adapted for forming of pin connection and in central openings of knives. Pivotal connection of handles with one another is provided by means of identical fastening members.

EFFECT: simplified construction, reduced labor intensity during scissors cutting edge resharpening and finishing operations.

3 cl, 5 dwg, 1 ex

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes piston with rod arranged in cylinder with possibility of operating by action of gas pressure source; actuating mechanism in the form of stationary and movable cutters. Device also includes yoke rigidly joined to cylinder and having groove for placing eccentric insert in it; rocking bar mounted with possibility of motion along yoke. Movable and stationary cutters are mounted on yoke. Movable cutter has one end jointly mounted in rod of piston and other end jointly mounted by means of said eccentric insert in rocking bar.

EFFECT: lowered size, enlarged manufacturing possibilities of device.

4 dwg

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes cylinder with openings for releasing gas, piston with rod and actuating mechanism. Device is provided with sleeve mounted in cylinder with possibility of axial motion. Said sleeve has mass less than common mass of piston with rod and of actuating mechanism. Sleeve is mounted with possibility of placing piston with rod inside it and it has grooves whose length exceeds height of piston. In bottom of sleeve there are openings that may be matched with gas releasing openings of cylinder.

EFFECT: increased useful life period, lowered mass of device.

3 dwg

FIELD: repairing and building works, mounting-dismounting operations and rescue works.

SUBSTANCE: manual tool includes rigidly joined one with other hydraulic cylinder, hydraulic pump with plunger pairs of high and low pressure, reservoir for working fluid and working organ joined with rod of hydraulic cylinder. High and low pressure plunger pairs are mounted separately. High-pressure plunger pair is mounted in cavity of plunger of low-pressure plunger pair with gap providing possibility for radial motion of plunger pairs one relative to other.

EFFECT: enhanced operational reliability of pump module and the whole tool.

2 cl, 2 dwg

FIELD: rescue operations during cutting process.

SUBSTANCE: machine has cylinder provided with holes for scouring gas, piston provided with rod, movable and motionless knives and gas pressure source. Cup is mounted for movement inside cylinder. Cup is provided with groove. Pin is mounted in piston to enter the groove.

EFFECT: improved reliability of operation.

1dwg

The invention relates to the means used, mainly, in extreme situations in saving people's lives and can be used for cutting rebar

The invention relates to the field of metal processing method of cutting or pressure and can be used when conducting rescue operations in a different kind of emergency for the dismemberment of metal structures providing access to the affected

The invention relates to a handheld tool that can be used in rescue operations during emergencies

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials, tubes.

SUBSTANCE: cutting blade includes hydraulic cylinder, control unit, two cutters mounted with possibility of rotation one towards other in common axle and having shaped cutting edges. Each cutting edge has cutting band tapered by angle 2 - 4° and having width consisting of 8 - 10% of cutter thickness and slope adjacent to said band and formed along remaining thickness of cutter. Each cutting edge has two crescent like cutouts mutually joined through bridge consisting of 10 - 20% of cutter thickness. Radius of inner crescent like cutout consists of 20 - 30% of radius of outer crescent like cutout. Cutting edge in crescent like cutouts is tapered by angle 40 - 50° and in bridge it is tapered by angle 50 - 56°.

EFFECT: enhanced efficiency of cutting due to distributing cutting edge for two crescent-like cutouts and due to using optimum configuration of cutting edge.

5 dwg, 1 ex

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes piston with rod arranged in cylinder with possibility of operating by action of gas pressure source; actuating mechanism in the form of stationary and movable cutters. Device also includes yoke rigidly joined to cylinder and having groove for placing eccentric insert in it; rocking bar mounted with possibility of motion along yoke. Movable and stationary cutters are mounted on yoke. Movable cutter has one end jointly mounted in rod of piston and other end jointly mounted by means of said eccentric insert in rocking bar.

EFFECT: lowered size, enlarged manufacturing possibilities of device.

4 dwg

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes cylinder with openings for releasing gas, piston with rod and actuating mechanism. Device is provided with sleeve mounted in cylinder with possibility of axial motion. Said sleeve has mass less than common mass of piston with rod and of actuating mechanism. Sleeve is mounted with possibility of placing piston with rod inside it and it has grooves whose length exceeds height of piston. In bottom of sleeve there are openings that may be matched with gas releasing openings of cylinder.

EFFECT: increased useful life period, lowered mass of device.

3 dwg

The invention relates to the means used mainly in emergency situations in saving people's lives, and can be used for cutting reinforcement and crushing of stones, and other works of this kind

The invention relates to the means used mainly in emergency situations for cutting rebar, the crushing of stone slabs and other similar works

Cutter // 2190749
The invention relates to the mining industry and allows cutting of pipes in the pit and the upper part of the casing and drill pipe in the conditions of the polluted environment by the elimination of open gas and oil gushers
The invention relates to a powerful rolling destructive tool as a tool for hydraulic excavator

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes cylinder with openings for releasing gas, piston with rod and actuating mechanism. Device is provided with sleeve mounted in cylinder with possibility of axial motion. Said sleeve has mass less than common mass of piston with rod and of actuating mechanism. Sleeve is mounted with possibility of placing piston with rod inside it and it has grooves whose length exceeds height of piston. In bottom of sleeve there are openings that may be matched with gas releasing openings of cylinder.

EFFECT: increased useful life period, lowered mass of device.

3 dwg

FIELD: equipment used, mainly at extreme condition for cutting reinforcement.

SUBSTANCE: device includes piston with rod arranged in cylinder with possibility of operating by action of gas pressure source; actuating mechanism in the form of stationary and movable cutters. Device also includes yoke rigidly joined to cylinder and having groove for placing eccentric insert in it; rocking bar mounted with possibility of motion along yoke. Movable and stationary cutters are mounted on yoke. Movable cutter has one end jointly mounted in rod of piston and other end jointly mounted by means of said eccentric insert in rocking bar.

EFFECT: lowered size, enlarged manufacturing possibilities of device.

4 dwg

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials, tubes.

SUBSTANCE: cutting blade includes hydraulic cylinder, control unit, two cutters mounted with possibility of rotation one towards other in common axle and having shaped cutting edges. Each cutting edge has cutting band tapered by angle 2 - 4° and having width consisting of 8 - 10% of cutter thickness and slope adjacent to said band and formed along remaining thickness of cutter. Each cutting edge has two crescent like cutouts mutually joined through bridge consisting of 10 - 20% of cutter thickness. Radius of inner crescent like cutout consists of 20 - 30% of radius of outer crescent like cutout. Cutting edge in crescent like cutouts is tapered by angle 40 - 50° and in bridge it is tapered by angle 50 - 56°.

EFFECT: enhanced efficiency of cutting due to distributing cutting edge for two crescent-like cutouts and due to using optimum configuration of cutting edge.

5 dwg, 1 ex

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials.

SUBSTANCE: combination type shears include hydraulic cylinder with control unit; two levers having cutters with cutting edges and mounted with possibility of rotation one towards other in common axle. Cutting edges have cutting teeth. Fixing teeth are formed on outer surface of lever ends. Length of cutting edges consists at least of 0.6 of level length. Cutting edges are tapered one to other by angle 40 - 50° relative to cutting line. Cutting teeth have pitch Z = 5 - 8 mm, thickness l1 = (0.2 - 0.25)Z, height h = (0.25 - 035)Z and width of initial land l = 0.8 -1.0 mm. Each tooth is tapered by angle α = 60 - 80° to side of lever rotation axis and it is sharpened by angle β = 25 - 35°. Fixing teeth have pitch 3 - 5 mm, depth 1.0 - 3.0 mm and inclination angle 60 - 80° to side of lever rotation axis. In variant levers end portions are tapered on their outer surface along length of 4 - 10 teeth by angle α1 = 20 - 40°. On inner surface of levers before cutting teeth smooth supporting surface with width 20 - 40 mm is formed.

EFFECT: enhanced efficiency of cutting and drawing apart due to using optimal non-symmetrical configuration of cutting and drawing apart fixing teeth.

2 cl, 4 dwg

Up!