Capabilities and characteristics of Mashek truck cranes

Specifications

Parameter

Models of Mashek crane installations for 15 - 32 tons

Equipment type KS3579 – 15-ton tank , installed on the chassis of a MAZ truck. The most popular model for urban conditions with dense buildings. Convenient to use during construction work and for unloading and loading cargo.

Equipment type KS45729A - 20-tonne , equipped with a limiter built into the hook that controls the weight of the load. The system allows you to determine the load permissible for a specific reach length. In conditions of limited space, the truck crane can operate at specified coordinates; the electronics automatically determine the permissible area of ​​operation.

Equipment type KS55727 is a 25-ton capacity, a reliable model for access roads of varying complexity. The truck crane is designed to perform unloading and loading operations at sites dispersed throughout the area. The machine has compact dimensions and is suitable for work in urban environments.

Equipment type 5571BY-5 is a 32-tonner, equipped with a powerful YaMZ engine with 330 horsepower. Has increased cross-country ability due to all-wheel drive of six wheels. Ideal for traveling in rural areas and off-road.

dimensions

Truck crane KS-3579

with a net lifting capacity of 15 tons, it is mounted on the chassis of a MAZ-5337A2 truck.
The KS-3579 truck crane
is designed to perform loading and unloading, construction and installation work with ordinary cargo at dispersed sites.
The chassis of the KC-3579 truck crane
has good maneuverability and ease of control, which allows the truck crane to be used with various types of access roads, and its small dimensions make it suitable for use in the cramped conditions of modern cities.

KC-3579
truck crane installation is driven by an axial piston pump, which is driven by the engine of the base vehicle through a gearbox and an additional power take-off. The winches of the lifting and turning mechanism are of the planetary type. Box-section lower frame with inclined hydraulic retractable outriggers.

Mechanisms of truck crane KS-3579

have an individual drive with independent control from hydraulic motors and hydraulic cylinders. The hydraulic system for installing the truck crane ensures smooth control of all mechanisms with a wide range of operating speeds, as well as the ability to simultaneously combine several truck crane operations.

The three-section boom length in the retracted position (8.75 m) provides the truck crane with compactness and maneuverability when moving, and in the extended position (20.75 m) it provides a large working area and a large height of cargo movement when the truck crane is operating. The ability to telescope the boom sections of a truck crane with a load allows the truck crane to perform special tasks during installation, install loads in hard-to-reach places, and carry them among mounted structures.

The safe operation of the truck crane is ensured by a complex of instruments and devices, including a microprocessor load limiter with digital display of parameters in the truck crane operator’s cabin. The load limiter can operate in coordinate protection mode and has a built-in device for recording characteristics - a “black box” and a built-in module for protecting against dangerous voltage when working near power lines.

MANIPULATING CRANES, CMU UNITS, TRUCK CRANES

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Truck crane KS-3579 Masheka and its characteristics

The KS-3579 Masheka truck crane with a lifting capacity of 15.0 tons based on the MAZ-5337 truck chassis is designed to perform loading and unloading, construction and installation work in industry, construction, agriculture and other sectors of the national economy (performing work operations with ordinary loads). The truck crane is designed for operation at an ambient temperature of ±40 °C and a relative humidity of 80% at 20 °C. Transport movement of the crane between work sites is provided on public roads. The KS-3579 Masheka truck crane with a lifting capacity of 15.0 tons on the chassis of a MAZ-5337 truck consists of load-bearing welded metal structures, mechanical and hydraulic units (assemblies), which are structurally combined into three main parts: the fixed part of the crane; rotating part of the crane; boom equipment. Hydraulic and electrical equipment with safety devices are allocated separately. The fixed part of the crane includes: the chassis of the base vehicle MAZ-5337; pump drive; frame with outriggers; suspension locking mechanism; rack; inclinometer. The rotating part of the KS-3579 Masheka truck crane includes: a rotating frame; rotation mechanism; cabin with heater, crane and engine controls, instruments, electrical equipment; counterweight; casing. The boom equipment consists of a three-section telescopic boom with power extension of sections with a long-stroke hydraulic cylinder and pulleys for extending and retracting the upper section of the boom, a winch, a cargo rope and a hook suspension, a hydraulic cylinder for lifting the boom, and a pressure roller. The telescopic boom of the truck crane is attached to the racks of the rotating frame using an axle. The cargo rope is fixed to the winch drum.

Hydraulic and electrical equipment are located on the fixed and rotating parts of the crane and on the boom equipment. Technical characteristics of the KS-3579 Masheka truck crane Type of crane - Jib truck, full-rotary with hydraulic drive mechanisms, general purpose Crane index - KS-3579 Truck crane base - MAZ-5337 chassis Maximum speed of lifting and lowering the hook suspension without load, m/min, not less — 20 Landing speed m/min, no more than — 0.4 Rotation speed, rpm: — Lowest, no more than — 0.4 — Highest, no less than — 1.6 Time of full change of departure, s, no less — 35 Speed ​​of extension and retraction of boom sections, m/min, no more than — 21 Maximum load with which boom sections can extend, t, no more than: — boom 8.75-14.75 m — 1.5 — boom 14.75-20 .75 m — 0.6 Permissible operating area of ​​an automobile KS-3579 Crane arm with a load from the longitudinal axis with the boom in the “Back” position, degrees ±120 Dimensions of the support contour, m: — in the longitudinal direction — 4.15 — in the transverse direction — 5 Control fuel consumption in crane mode, dm3, no more than — 9.6 Elevation overcome by the crane, degrees, no more than — 14 Maximum transport speed on a horizontal section of the road with a hard surface, km/h, no more than — 60 Total weight of the crane, t , no more than — 15.975 Load distribution along axles in transport position, t — front axle — 6.225 — rear axle — 9.75 Crane mechanisms KS-3579 Masheka with a lifting capacity of 15.0 tons based on MAZ-5337 Pump drive — from the chassis gearbox through power take-off gearbox. Gear ratio - 0.67. The turning mechanism is a combined planetary-cylindrical disk brake gearbox, normally closed, automatic. The boom lifting mechanism of the KS-3579 truck crane is a hydraulic cylinder, piston diameter is 200 mm, rod stroke is 1400 mm. The winch is a combined planetary-cylindrical gearbox. Counterweight - gear ratio - 29.16 drum diameter - 427 mm. normally closed disc brake, hydraulic automatic movement mechanism. Hydraulic cylinder: piston diameter - 63 mm. rod stroke - 1000 mm. The mechanism for extending and retracting the boom sections of the KS-3579 Masheka crane with a lifting capacity of 15.0 tons based on the MAZ-5337 is a hydraulic cylinder with an extension and retraction pulley, the total stroke of the sections is 12,000 mm. Piston diameter -100 mm. rod stroke - 6000 mm. Outriggers are rotatable with hydraulic cylinders for hanging the crane; they are brought into working position manually. piston diameter - 100 mm. rod stroke - 500 mm. The rear suspension locking mechanism is a hinged lever with a hydraulic locking drive. Rotary support device - a rotating, roller support with external gear teeth. Control of the mechanisms of the KS-3579 Masheka crane - hydraulic valves with manual and electrical control. The engine control drive is a pedal in the driver's cab. The cabin is closed, single, with an adjustable seat, an opening upper window, a windshield wiper, a heating and defogging system, a fan and sun visor, an upper window wiper, and a heating unit. The rotating support roller device (ROD) is designed to rotate the rotating part of the KS-3579 truck crane relative to the non-rotating one. The OPU consists of two half-clips connected to each other by bolts, a crown and rollers arranged crosswise. The output gear of the rotation mechanism is meshed with a ring bolted to the frame. The half-rings are bolted to the rotating frame. The gap between the half-clips and the rollers is adjusted by spacers. There are oil nipples for lubricating the rollers and raceways. Sealing is done with cuffs. The pump is driven from the chassis gearbox based on the MAZ-5337 using a power take-off.

The power take-off is attached to the gearbox housing on the right side. Pump 11 is attached with a bracket to the right side member of the chassis.

The power take-off and pump are connected by a cardan shaft 10. Sealing gaskets are placed between the flanges of the gearbox and power take-off housings, with the help of which, at the same time, the gear engagement is adjusted. The drive shaft 12 of the power take-off is driven into rotation from the intermediate shaft of the gearbox using a gear specially installed for this purpose on the shaft, which is in constant engagement with the idler gear 5 of the power take-off. With the idler gear 5, when the power take-off is turned on, the driven gear 15 is engaged, which can move along the outer splines of the drive shaft 12 using a sleeve 17, a pin 16, a pusher 18 and a piston 22. The activation is carried out when air pressure is supplied from the chassis pneumatic system. The shutdown occurs under the action of spring 14 when the air supply to sleeve 1 is turned off. The rotation mechanism of the KS-3579 Masheka truck crane is used to rotate the rotating part of the crane. The gearbox of the turning mechanism is combined, the design of which is similar to the design of the gearbox and winch. Rotation from the hydraulic motor is transmitted to a gear pair with internal gearing, consisting of a pinion and a gear, and then to the pinion shaft.

The satellites, rotating, roll along the epicycle attached to the body and transmit torque to the carrier. A gear connected through a shaft to a carrier transmits torque to the ring of the slewing ring. To be able to rotate the rotating part of the KS-3579 truck crane with a lifting capacity of 15.0 tons based on the MAZ-5337 manually, the intermediate shaft has a square shank brought out. Swing mechanism brake, normally closed disc brake. Its design is similar to that of a winch brake and differs only in the compression force of the springs. The boom equipment ensures the operation of the load-handling member (hook) in the working area of ​​the crane and consists of the following main components; telescopic boom, hook suspension, boom lift hydraulic cylinder, cargo rope. The telescopic boom KS-3579 is connected to a rotating frame by a lifting hydraulic cylinder, a boom and an axis in the root part of the base. The telescopic boom consists of a base 8, a middle retractable section 5 and an upper retractable section 2, which are box-shaped welded structures.

The middle section of the KS-3579 boom is moved by a hydraulic cylinder 10, hinged to the base and middle section of the boom. The upper section of the boom is moved by an extending and retracting pulley while the middle section is moving. Extension and retraction pulleys consist of ropes 6 and 14 and blocks 3. Schemes for reeving the ropes are shown in Figure B. 11, sheet 3. The tension of the ropes is carried out using rods 7. When moving sections of the boom KS-3579 rest in front on sliding plates 15 installed in the front part of the base and middle section, and at the rear on sliding plates 9 installed in the rear part of the middle and upper section. The stops are installed close to the side surfaces of the section and limit the movement of the sections from lateral displacement. The stops are installed on adjusting shims. As the stops wear, the gaskets are removed.

The change in reach is carried out by hydraulic cylinder 11, which is attached at one end with an axle to the boom eyes, and at the other end with an axle in the eyes of the rotating frame beam. In the transport position, the weight of the boom is transferred to the boom support rack. Stop 13 must always be in working position. If it is necessary to lower the boom to the lowest position, the stop 13 is removed from the working position by releasing the lock 12. The adjustment of the ropes for extending and retracting sections of the telescopic boom of the KS-3579 truck crane is carried out in the following sequence: - retract the boom sections so that the length of the boom is 8.75 m (until the middle section 5 touches the base of the boom 8); — use rope nuts 14 on the head of the boom base to adjust the tension of the rope until the stop of the upper section touches the head of the middle section; — use rope nuts b on the upper belt of the boom base to adjust the rope tension until a gap of 1...2 mm is formed between the stops of the upper section and the head of the middle section; - lock the nuts. The hook suspension of the winch of the KS-3579 Masheka truck crane with a lifting capacity of 15.0 tons consists of working blocks rotating on rolling bearings on an axis and fixed by spacer bushings, a traverse 3, on which a hook with a lock is installed on a thrust rolling bearing, cheeks. The blocks are protected from below by a casing to prevent the rope from falling out. A bracket is installed on the casing mounting studs to act on the hook lift limiter. The weight of the hook suspension is further increased with the help of weights. All crane mechanisms are powered by the MAZ-5337 chassis engine. The power taken from the engine through the chassis gearbox and pump drive through the working fluid of the hydraulic system is transmitted to the actuators and hydraulic cylinders of the crane through the starting and control equipment. At the same time, the KS-3579 Masheka truck crane with a lifting capacity of 15.0 tons based on the MAZ-5337 can perform the following operations: — blocking the rear axle suspension; — hanging the crane on outriggers; — extension of the counterweight; — raising and lowering the telescopic boom; — turning the rotating part of the crane; — lifting and lowering the load with a winch; — telescoping of boom sections; — extension (retraction) of the counterweight; — removing the crane from the outriggers; — unlocking the rear axle suspension. Using the starting and control equipment of the hydraulic system of the KS-3579 crane and the engine control of the chassis based on the MAZ-5337, you can regulate the speeds of the mechanisms performing basic crane operations. Limitation of simultaneous performance of work operations - it is prohibited to perform operations with loads exceeding 70% of the load capacity according to the load characteristics when combining the following operations: - rotation of the rotating part of the crane with lifting (lowering) of the load; — rotation of the rotating part of the crane with raising (lowering) of the boom; — combining the operations of extending (retracting) boom sections with raising (lowering) the boom or lifting (lowering) the load is allowed when the weight of the load on the hook is no more than 0.4 tons. The control drive for crane operations consists of a block, a control with handles: respectively, rotation mechanisms , telescoping boom sections, winch, raising and lowering the KS-3579 Mashek boom, connected by rods to the hydraulic valve spools using forks and axles. A button is built into the handle handle, which serves to increase the speed of raising and lowering the hook without a load and with a small load. There is a horn button built into the handle handle. The screws serve to limit the travel of the handles. The rods are equipped with stops for controlling the limit switches. The position of the stops on the rods is fixed with screws. Limit switches allow you to work when the load limiter is activated in the direction of reducing the overturning moment. Switching on and off crane operations must be done smoothly; abrupt switching on and off leads to water hammer. Do not suddenly release the handles. Adjust the crane operations control drive with the engine control drive adjusted in the following sequence: Adjusting the actuation of the limit switches of the KS-3579 Mashka truck crane with a lifting capacity of 15.0 tons based on the MAZ-5337: - adjust the vertical position of the handles with the threaded connection of the rods, - while the handles must be free , without jamming, return to the neutral position under the action of the hydraulic valve springs; — use a screw to install the surface of the stop close to the limit switch roller. In this case, operation (closing or opening contacts) of the switch should occur when using no more than 1/4 of the stroke of the levers, lock the screw with a nut; Adjusting the speed of crane operations KS-3579 Masheka: - set the engine speed - 1100 rpm; - limit the handle stroke with screws to values ​​at which the time for changing the reach from 3 m to 7.8 m and back at a maximum speed of lowering and raising the boom of 8.75 m will be 35...38 s; — set the 8.75 m boom to its highest position; - limit the handle stroke with screws to values ​​at which the extension (retraction) of the boom section is from 8.75 to 20.75 m at the maximum extension (retraction) speed of 33... 35 s.

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• Equipment KS-35714
• Hydraulic system KS-35714, KS-35715
• Equipment and mechanisms KS-3577-4
• Recommendations for repairing KS-3574
• Hydraulic equipment KS-55713
• Repair of telescopic boom KS-55713-1K-3
• Parts and mechanisms of the rotating part KS-45717-1
• Design and controls KS-4572, KS-45719
• Operation of hydraulic equipment KS-45721, KS-45715
• Device KS-55727
• Review of the KS-6476 design
• Maintenance of KS-3579
• Adjustments KS-35719
• Truck crane KS-3575
• Crane KS-5576 Ivanovets
• Truck crane KS-5473 Dnepr
• XCMG QY25K5S truck crane

• Crawler crane MKG-25 BR
• Repair of chassis DEK-251
• Crane RDK-250

Characteristic features of the technology

The category of machines to which the Masheka truck crane belongs has maneuverability and easy control, thanks to which the equipment can easily maneuver in difficult construction conditions in a limited area.

Despite its serious appearance, the car is quite compact in size, so in a cramped space, moving from object to object, it easily avoids obstacles without compromising productivity.

Load-height characteristics of the Masheka truck crane based on the MAZ-660303 chassis

The freedom of movement of the vehicle is not affected in any way by the folded boom of the truck crane. This indicates the high productivity of the equipment not only during operation, but also when moving from site to site. The movement of the boom is quite smooth, it is possible to telescope it together with the load, and this is convenient when transporting the latter to the most inaccessible points.

The crane unit is driven by a winch system, which allows it to swing and lift. While carrying out work, the stationary state of the machine is maintained by retractable hydraulic supports attached to the lower frame, which makes it possible to level out uneven terrain, achieving a stable position. This is especially true when moving large loads between structural elements of buildings.

Mashek truck cranes are equipped with electronics that allow you to control the truck crane - its load, coverage area and roll. The system allows the operator to work safely in conditions where space is limited. The cabin is equipped with a special display that displays information about the load on the equipment. The data comes from the load limiter.

Other models

The KS55727 truck crane model with its basic configuration has:

• An arrow consisting of four sections. Its length ranges from 10.08 m to 28.08 m when fully expanded. This makes the Masheka truck crane different from other models of 25-tonne trucks, whose reach usually does not exceed 24.00 meters. The boom can be raised to a height of up to 27.00 m.
• Chassis based on MAZ;
• Wheel formula 6x4;
• Engine YaMZ;
• Curb weight 24.50 tons.
• In transport condition, the dimensions of the machine reach up to 12.00 meters in length, 2.50 meters in width and 3.98 meters in height.

The Masheka 5571BY-5 truck crane based on the MAZ chassis has:

• A telescopic boom capable of extending to 28.08 m. The lifting height is limited to 20 meters, in the lower position – 3.20 meters;
• Control system and automatic blocking in case of overload;
• Wheel formula 6x6;
• Engine brand YaMZ.
• Load capacity up to 32 tons with a curb weight of 25.30 tons;
• Dimensions: 12.00 m – length, 2.50 – width and 4.00 – height;
• The speed of movement between different objects is 60 km/h.