The KS-55727 jib crane, based on a 3-axle MAZ chassis, is designed for loading and unloading operations, as well as for use in the construction of low-rise buildings. The design of the machine allows operation at temperatures from -35°С to +40°С and wind force up to 14 m/s. The deployed crane installation remains stable in wind gusts of up to 40 m/s, but manipulation of the load is prohibited.
Specifications
The cars are assembled at a plant located in Mogilev (Belarus). The design uses components produced by related enterprises from Russia, Belarus, Italy and a number of other countries. Hydraulic cylinders are used to drive the crane installation. A power take-off gearbox is installed on the base chassis gearbox, which is used to drive an axial piston pump.
The slewing bearing uses a planetary gearbox equipped with a separate hydraulic motor of a gerotor circuit and a multi-disc brake. Hydraulic cylinders are used to control the boom installation angle; hydraulics and an additional pulley are used to drive the boom sections. The telescopic boom consists of 4 separate parts, providing a circular working area.
Technical characteristics of the Masheka KS-55727 crane:
- length (when driving on the highway) - 12000 mm;
- width (excluding mirrors) - 2500 mm;
- height - 3800 mm;
- base - 4900 mm;
- length/width of the support contour - 5080/5400 mm;
- load moment - 80 kN*m;
- load capacity - 25 t;
- load lifting height - 27.1 m;
- rotation speed - 0.2-0.96 rpm;
- boom radius - 10.08-28.08 m;
- curb weight of the car - 24.5 tons.
MANIPULATING CRANES, CMU UNITS, TRUCK CRANES
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Technical parameters of the KS-55727-1 truck crane
The KS-55727-1 jib truck crane with a lifting capacity of 25 tons is designed to perform loading and unloading, construction and installation work with ordinary loads at dispersed sites. The truck crane is designed for operation at an ambient temperature of 40 C and a relative humidity of 80% at 20 C. Permissible wind speed at a height of 10 m: for the operating state of the truck crane -14 m/s1; for non-working condition -40 m/s2. The permissible slope of the site for installing a truck crane for operation of the crane on outriggers is 5% (3˚). The permissible angle of inclination to the horizon when working on outriggers is -1.5˚. The KS-55727-1 truck crane consists of load-bearing welded metal structures, mechanical, hydraulic, electrical and pneumatic units (units), which are structurally combined into three main parts: a fixed part, a rotating part and boom working equipment.
Main mechanisms of the KS-55727-1 truck crane 1 - telescopic boom; 2 — chassis pneumatic equipment; 3 — boom support stand; 4 - electrical equipment; 5 — engine control drive; 6 - heater; 7 — cabin; 8 — rotating support; 9 — rotating frame; 10 - winch; 11 — pressure roller; 12 — spare wheel; 13 — counterweight; 14 — rotation mechanism; 15 — control drive for crane operations; 16 - floorings; 17 — lower frame, 18 — outriggers; 19 — pump drive; 20 - hydraulic equipment Technical characteristics of the KS-55727-1 truck crane Type of crane - Jib truck, full rotation with hydraulic drive mechanisms, general purpose Index - KS-55227 Base - MAZ-6303 truck chassis Maximum lifting capacity, t - 25.0 Loading capacity at maximum reach, t — 0.7 Maximum load moment, kNm — 80 Maximum lifting height, m — 27.1 Maximum load moment, kNm — 80 Maximum lifting height, m — 27.1 Lifting height at maximum reach, m — 19.6 Lowering depth maximum, m — 3.0 Maximum reach, m — 20.0 Reach at maximum load capacity, m — 3.2 Minimum reach, m — 3.2 Maximum load weight with which telescopic boom sections of the KS-55727-1 truck crane are allowed to extend : - Boom 10.08 m -14.08 m - 4.0 - Boom 14.08 m -22.08 m - 1.5 - Boom 22.08 m -28.08 m - 0.6 Maximum load weight allowed extension of sections of the telescopic boom of the KS-55727-1 truck crane: - Boom 10.08 16.08 m - 6.0 - Boom 16.08 22.08 m - 4.0 - Boom 22.08 24.08 m - 2.0 — Boom 24.08 28.08 m — 0.6 Speed of lifting (lowering) and landing the load, m/s (m/min): — nominal — 0.1 (6.0) — increased (with load no more than 4 t) - 0.22 (13.30) - landing - 0.0067 (0.4) Speed of the telescoping mechanism for boom sections of the KS-55727-1 truck crane, m/s (m/min) - 0.3 (18) Turning mechanism speeds (rotation frequency), rad/s (rpm): - lowest, no more than - 0.021 (0.2) - highest, no less than - 0.1 (0.96) Rotation angle, rad (deg) : - without load on the hook - 6.28 (360) - with load on the hook - 4.19 (240) Geometric parameters of the KS-55727-1 truck crane Dimensions of the support contour, m: - in the longitudinal direction - 5.08 - in the transverse direction direction - 5.4 Overall dimensions in transport position, m, no more - length - 12.0 - width - 2.5 - height - 3.8 Technically permissible total weight of the KS-55727-1 truck crane, t - 24.5 Technically permissible axial load in transport position, t: - front axle - 6.5 - rear bogie - 18.0 Mechanisms of the KS-55727-1 truck crane Pump drive of the KS-55727-1 truck crane From the power take-off, gear ratio - 1. Pump axial piston - 310.3.112.04 or MG 112/32.4 or A1.112.25.04. From the power take-off box on the chassis transfer case. Axial piston pump 310.3.112.03 or A1.112.25.03. Rotation mechanism of the truck crane KS-55727-1 Planetary gearbox - 705T2G Trasmital BONFIGLIOLI SpA (Italy). Gear ratio - 43.8. Open gear transmission with a gear ratio of 16.4. The brake is automatic, normally closed, multi-disc. Gerotor hydraulic motor - MG 80SD. Mechanism for lifting the boom of a truck crane KS-55727-1 Double-acting hydraulic cylinder: — Piston diameter — 200 mm. — Piston stroke — 2550 mm Boom KS-55727-1 — Telescopic, box-section, four-section. Mechanism - Hydraulic cylinders with pulley pulley for extension and retraction of boom sections. 2 hydraulic cylinders: Piston diameter - 100 mm, Piston stroke - 6000 mm 2 hydraulic cylinders: - 1st hydraulic cylinder: Piston diameter - 100 mm, Piston stroke - 6000 mm - 2nd hydraulic cylinder: Piston diameter - 125 mm, Piston stroke - 6000 mm Truck crane winch KS-55727-1 Planetary gearbox - 706С2В (Italy). Gear ratio - 44.6. The brake is automatic, normally closed, multi-disc. Axial piston unregulated hydraulic motor - 303.3.112.503 or MGE 112/32 / MGP 112/32. Drum diameter - 520 mm. Outriggers of the truck crane KS-55727-1 Retractable with hydraulic cylinders for hanging the truck crane. Piston diameter - 140 mm. Rod stroke - 625/700 mm; The following beams are brought into working position by hydraulic cylinders: - Piston diameter - 63 mm, Rod stroke - 1565 mm - Piston diameter - 63 mm, Rod stroke - 1770 mm. Rotary support - Rotary, roller support with external teeth. Control of mechanisms of the KS-55727-1 truck crane - Manually controlled hydraulic valves. Engine control drive - Pedal in the driver's cab. Cabin - Closed, single, with adjustable seat, opening rear window with wiper, heating and ventilation system and sunshade, windshield washer. Microclimate creation system - Heating unit, cabin air conditioning (optional). Electrical equipment of the KS-55727-1 truck crane Electrical system - Single-wire with a rated voltage of 24V DC. Current collector - Ring type. Cabin interior lighting - Lamp. Exterior lighting - Two lights: on the cab and boom head, marker light on the boom head. Fuses - Fuse block with fusible links. Devices - Crane load limiter ONK-160S or OGM 240-14. Other equipment - Limit switches, switches, switches, control buttons. Hydraulic equipment of the KS-55727-1 truck crane Hydraulic cylinders - Piston, double-acting or single-acting. Pump and hydraulic motors - Axial piston. Hydraulic distributors - Sectional, spool type. Other hydraulic equipment - Manually controlled hydraulic valves, electrically controlled hydraulic valves, hydraulic locks, safety valves, brake valves. Safety devices of the truck crane KS-55727-1 Hook lift limiter - Limit switch on the head of the boom suspension. Rewind Stop - Limit switch on the winch rope bracket. Load limiter - Load limiter with a protection module against dangerous ONK-160S or OGM 240-14 voltage and a telemetric memory unit. Truck crane tilt angle indicators - Fluid instruments on the support frame and in the driver's cabin. Filling tanks, l: — Hydraulic system (full capacity) — 430 — Heater fuel tank — 12 — Swing gearbox — 3.1 — Winch gearbox — 2
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Modifications
The plant produced a number of modifications of the machine, which differed in the basic chassis and elements of the crane installation. The carrying capacity of the equipment remains unchanged. The basic delivery version uses a shortened driver's cabin that does not have a berth. The modification with a sleeping bunk is made on separate orders and is rare.
KS-55727-1
The KS-55727-1 truck crane is installed on a MAZ-6303 truck equipped with a rear bogie wheel drive. To increase the stability of the crane on a vehicle chassis, a forced locking of the rear suspension is used. The system turns on automatically when the machine is suspended on supports. The crane installation is located on a moving part mounted on a chassis through a roller ring equipped with a ring gear with external gearing of the rotation drive.
KS-55727-7
The vehicle is installed on a MAZ-6303A3 chassis, equipped with a 250-horsepower YaMZ-6562 diesel engine that meets Euro-3 requirements. The driver is located in a closed metal cabin equipped with autonomous heating and a ventilation system with forced air supply. The rear window is installed in a folding frame, which provides additional ventilation. Air conditioning was used on some of the cars.
The design of the machine uses boom lift and cable winding limiters, which are limit switches.
Tilt angle indicators are installed in the driver's cabin and on the support contour. Additionally, an electronic load limiter is installed, which is equipped with a voltage protection module. The device does not allow work near power lines. All operational data is recorded in non-volatile memory.
KS-55727-A-12
The vehicle is a further development of the KS-55727-7-12 modification. A special feature of the design is the use of the MAZ-6312V3 chassis, equipped with a 270-horsepower YaMZ-5361 turbodiesel that meets Euro-4 requirements. The machine uses upgraded boom drive hydraulics, which provide improved performance.
The crane installation features a redesigned operator's cabin. The design uses a panoramic windshield, and the thickness of the pillars is reduced. The walls are lined with material that provides sound insulation. The standard equipment includes a Russian-made diesel heater; imported analogues are used upon request. Air conditioning may be used.
