Compact folding crane

Abstract

Compact folding crane, including: a base (1); a telescopic vertical rail (4), the telescopic vertical rail (4) being fixed to the base (1); a boom (10), one end of the boom (10) being movably connected to the upper part of the telescopic vertical rail (4); an electric motor (3), the electric motor (3) being mounted on the base (1); an electromotive winch (2), wherein the electromotive winch (2) is connected to an output shaft of the electric motor (3); a plurality of first pulleys (12), the plurality of first pulleys (12) being rotatably connected to the other end of the boom (10) and the upper part of the telescopic vertical rail (4); a rope (7), the rope (7) being wound around the electromotive winch (2); a hook (13), wherein a free end of the rope (7) extends through the first pulley (12) to connect to the hook (13); and a controller (31), wherein the controller (31) is communicatively connected to the electric motor (3); characterized by that the compact folding crane further comprises a lifting beam (16), paired articulated arms, a plurality of hinge pins (18) and a hydraulic telescopic lever (24); that the telescopic vertical rail (4) comprises a plurality of rail segments which are telescopic, wherein the lifting support (16) is fixedly connected to one of the plurality of rail segments, with the exception of a lowermost rail segment; that the paired articulated arms comprise a first articulated arm (22) and a second articulated arm (19), wherein the middle part of the first articulated arm (22) and the middle part of the second articulated arm (19) are rotatably connected by a hinge pin (18); wherein one end of the first articulated arm (22) is articulated and displaceably connected to the base (1) by a corresponding hinge pin (18), and the other end of the first articulated arm (22) is articulated to the lifting support (16) by a corresponding hinge pin (18); wherein one end of the second articulated arm (19) is articulated to the base (1) by a corresponding hinge pin (18), the other end of the second articulated arm (19) is articulated and displaceably connected to the lifting support (16) by a corresponding hinge pin (18); that the hydraulic telescopic lever (24) is fixedly connected at one end to the first articulated arm (22) and at the other end to the second articulated arm (19), wherein the hydraulic telescopic lever (24) is communicatively connected to the controller (31), and wherein the hydraulic telescopic lever (24) is controlled to press the first articulated arm (22) and the second articulated arm (19) away from each other or towards each other.

Description

TECHNICAL FIELD

[0001] The present invention relates to a compact folding crane. STATE OF THE ART

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally transports goods within a specific area. Also known as a crown block, aerial crane, or overhead crane, this hoist has the characteristic of moving intermittently, meaning the corresponding mechanisms for actions such as lifting, moving, unloading, etc., are operated alternately in a single work cycle. These cranes have been increasingly developed and used in the market.

[0003] This application concerns a sophisticated, compact crane with a maximum lifting capacity of 500 kg. The crane can meet the needs of small construction sites, residential buildings, and light industrial operations. It utilizes cutting-edge manufacturing techniques and focuses on efficiency, safety, and durability, making it a reliable solution for performing lifting tasks in challenging environments. CONTENT OF THE PRESENT INVENTION

[0004] The present invention is based on the object of creating a compact foldable crane.

[0005] To achieve the above-mentioned object, the present invention provides the following solution: A compact folding crane comprising a base, a telescopic vertical rail, a boom, an electric motor, an electric motor winch, a plurality of first pulleys, a rope, a hook, and a controller, wherein the telescopic vertical rail is mounted on the base, one end of the boom is movably connected to the top of the telescopic vertical rail, the plurality of first pulleys are rotatably connected to the other end of the boom and the top of the telescopic vertical rail, the electric motor is mounted on the base, the electric motor winch is drivingly connected to an output shaft of the electric motor, the rope is wrapped around the electric motor winch, a free end of the rope extends through the first pulley to connect to the hook, and the controller is communicatively connected to the electric motor;characterized in that the telescopic vertical rail comprises a plurality of rail segments which are telescopic; that the compact foldable crane further comprises a lifting beam, paired articulated arms, a plurality of hinge pins and a hydraulic telescopic lever, wherein the paired articulated arms comprise a first articulated arm and a second articulated arm, wherein the lifting beam is fixedly connected to one of the plurality of rail segments, with the exception of a lowermost rail segment; that the middle part of the first articulated arm and the middle part of the second articulated arm are rotatably connected by a hinge pin; that one end of the first articulated arm is hingedly and slidably connected to the base by a corresponding hinge pin, and the other end of the first articulated arm is hingedly connected to the lifting beam by a corresponding hinge pin;that one end of the second articulated arm is articulated to the base by a corresponding hinge pin, the other end of the second articulated arm is articulated and slidably connected to the lifting beam by a corresponding hinge pin, the hydraulic telescopic lever is fixedly connected at one end to the first articulated arm and at the other end to the second articulated arm, the hydraulic telescopic lever is communicatively connected to the control unit, and the hydraulic telescopic lever is controlled to urge the first articulated arm and the second articulated arm away from each other or towards each other;

[0006] In some embodiments, two hinge sockets are provided on the base, wherein one hinge socket is slidably connected to the base and is hingedly connected to one end of the first hinge arm via a corresponding hinge pin, and wherein the other hinge socket is attached to the base and is hingedly connected to one end of the second hinge arm via a corresponding hinge pin.

[0007] In some embodiments, a guide groove is formed on the base, and a roller is provided on the lower part of one joint socket, the roller engaging in the guide groove. In some embodiments, a guide slot is formed on the lifting support, into which the joint pin at the other end of the second joint arm slidably engages.

[0008] In some embodiments, one end of the hydraulic telescopic lever is fixedly connected to the hinge pin at the other end of the first hinge arm, and the other end of the hydraulic telescopic lever is fixedly connected to the hinge pin at the other end of the second hinge arm.

[0009] In some embodiments, the base has a frame structure; the base is provided with a plurality of screws or hooks, and the base is configured to be connected to the chassis of a vehicle by a plurality of screws or hooks.

[0010] In some embodiments, the electric motor is an electric motor with a built-in brake, or the electric motor is coupled to the electric motor winch via a brake; the electric motor is powered by the vehicle battery or an external power source.

[0011] In some embodiments, a guide beam is fixedly provided on the telescopic vertical rail, with a second pulley rotatably connected to the central part of the guide beam through which the rope extends.

[0012] In some embodiments, the lifting support is firmly connected to the guide support.

[0013] In some embodiments, the boom is pivotally connected to the telescoping vertical rail. One end of a hydraulic pitching telescope is pivotally connected to the telescoping vertical rail, and the other end of the hydraulic pitching telescope is pivotally connected to the boom. The hydraulic pitching telescope is communicatively connected to the controller.

[0014] In some embodiments, the boom consists of a plurality of telescoping boom segments. One end of a hydraulic telescoping boom is fixedly connected to one of the boom segments, and the other end of the hydraulic telescoping boom is fixedly connected to another boom segment. The hydraulic telescoping boom is communicatively connected to the controller.

[0015] In some embodiments, the hook is forged from steel bar; the hook is equipped with safety locks.

[0016] In some embodiments, a plurality of adjustable feet are fixedly connected beneath the base, wherein the adjustable feet are hydraulic telescopic feet.

[0017] In some embodiments, the base is provided with a removable, foldable ramp on its rear.

[0018] In some embodiments, an overload sensor is provided at the connection point of the rope to the hook, which is communicatively connected to the controller.

[0019] In some embodiments, a position sensor is provided at the connection point of the rope to the hook, which is communicatively connected to the controller.

[0020] In some embodiments, the compact folding crane further comprises a protective cage. The protective cage is provided with a protective padding at the bottom and includes an openable door that can be locked by a latch.

[0021] In some embodiments, the protective cage uses a modular structure in which different sections of the protective cage are assembled using snap-fit ​​or quick-attach screws.

[0022] In some embodiments, a platform is mounted on the lifting beam. A protective grille and a control panel are mounted on the platform.

[0023] In some embodiments, the electric motor winch is provided with a housing which is designed to receive the rope when the compact folding crane is not in use.

[0024] The movable lifting device disclosed in the present application is intended to be able to handle heavy goods, e.g., animals such as camels, safely and efficiently. The device can be integrated into a vehicle, such as a truck or a freight wagon, and provides a compact, foldable system for lifting, holding, and transporting goods. The system uses a telescopic rail as the main vertical lifting structure. The rail consists of smoothly telescoping segments and can be compactly stored when not in use. On the top of the rail, a durable pulley guides a steel cable connected to an electric motor-driven winch. The winch is powered by the vehicle's battery or an auxiliary power source, ensuring precise control during raising and lowering. To ensure stability, adjustable, stable feet are attached to the base of the device.These feet can be telescoped, ensuring the system's stability on uneven road surfaces and preventing tipping or instability. The suspended load is housed in a protective cage made of a lightweight yet strong material. This protective cage is designed to ensure the safety of loads (e.g., camels) during suspension and transport. It includes a protective pad and a locking device to increase safety. To facilitate loading and unloading, the system is equipped with a folding ramp. The ramp is connected to the vehicle and provides a smooth, non-slip surface for moving loads onto the platform. Once the loads are secured, the system can be retracted, enabling efficient transport. The device is controlled via a central panel.This panel allows the user to operate the lifting mechanism, monitor the weight and position of the load, and activate an emergency stop if necessary. While sensors integrated into the system ensure precise movement, safety features such as automatic braking can prevent accidents. The device is lightweight, portable, and easy to install. Its compact design allows for efficient storage when not in use, making it a practical solution for outdoor use, transporting large animals, or as an emergency response. It combines stability, efficiency, and safety and is suitable for a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to explain the embodiments of the present invention or the prior art solutions more clearly, the accompanying drawings are briefly described for embodiments, in which show: Fig. 1 shows a schematic representation of the structure of a compact folding crane according to the present invention; Fig. 2 the structure of the lifting beam and the guide beam in a schematic representation; Fig. 3 the structure of the protective cage in a schematic representation; and Fig. 4 Connections between the controller and components in schematic representation. DETAILED DESCRIPTION

[0026] The technical solutions of the embodiments of the present invention will be described more clearly and completely below with reference to the drawings of the embodiments of the present invention.

[0027] In order to better understand the above-mentioned objects, features and advantages of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments.

[0028] As in Fig. 1 and Fig. 4, this embodiment provides a compact folding crane. The compact folding crane includes a base 1, a telescopic vertical rail 4, a boom 10, an electric motor 3, an electric motor winch 2, a plurality of first pulleys 12, a rope 7, a hook 13, and a controller 31. The telescopic vertical rail 4 is mounted on the base 1. One end of the boom 10 is movably connected to the top of the telescopic vertical rail 4. The plurality of first pulleys 12 are rotatably connected to the other end of the boom 10 and the top of the telescopic vertical rail 4. The electric motor 3 is mounted on the base 1. The electric motor winch 2 is drivenly connected to an output shaft of the electric motor 3. The rope 7 is wound around the electric motor winch 2.A free end of the rope 7 extends through the first pulley 12 to connect to the hook 13. The controller 31 is communicatively connected to the electric motor 3. The compact folding crane has a compact design, facilitates transport and storage, and maintains a high load capacity.

[0029] The telescopic vertical rail 4 includes a plurality of telescopic rail segments designed to be folded or laid on the base 1 when not in use, thereby minimizing the space occupied. The compact folding crane also includes a lifting beam 16, paired articulated arms, a plurality of pivot pins 18, and a hydraulic telescopic lever 24. The paired articulated arms include a first articulated arm 22 and a second articulated arm 19. The lifting beam 16 is fixedly connected to one of the plurality of rail segments, except for a lowermost rail segment; the middle part of the first articulated arm 22 and the middle part of the second articulated arm 19 are pivotally connected by a pivot pin 18;One end of the first articulated arm 22 is pivotally and slidably connected to the base 1 by a corresponding pivot pin 18, and the other end of the first articulated arm 22 is pivotally connected to the lifting beam 16 by a corresponding pivot pin 18; one end of the second articulated arm 19 is pivotally connected to the base 1 by a corresponding pivot pin 18, the other end of the second articulated arm 19 is pivotally and slidably connected to the lifting beam 16 by a corresponding pivot pin 18; the hydraulic telescopic lever 24 is fixedly connected to the first articulated arm 22 at one end and fixedly connected to the second articulated arm 19 at the other end. The hydraulic telescopic lever 24 is communicatively connected to the controller 31, and the hydraulic telescopic lever 24 is controlled to urge the first articulated arm 22 and the second articulated arm 19 away from or towards each other.

[0030] In some embodiments, the boom 10 and the telescopic vertical rail 4 are constructed of steel or a strong alloy to withstand the dynamic forces exerted by an animal such as a camel. Furthermore, a reinforced pulley system should be incorporated to ensure reliable lifting of a camel, and a double-pulley or triple-pulley system may be used to reduce moving loads.

[0031] In some embodiments, there are a plurality of pairs of articulated arms, the number of articulated arms being selected according to actual needs. In embodiments where two pairs of articulated arms are present, as in Fig. As shown in Figure 2, the corresponding articulated arms are hinged to the lifting beam 16 by a common hinge pin 18 (elongated pin), with both ends of the hydraulic telescopic lever each attached to the corresponding elongated pin. The hydraulic telescopic lever can thus move the elongated pins and thus several pairs of articulated arms toward or away from each other to raise and lower the telescopic vertical rail 4. When not in use, the telescopic vertical rail 4 is lowered to a sufficient extent to allow compact storage of the crane.

[0032] In some embodiments, the base 1 has a frame structure; the base 1 is provided with a plurality of quick-release bolts or hooks, and the base is configured to be connected to the chassis of a vehicle by a plurality of quick-release bolts or hooks, i.e., to be integrated into a vehicle such as a truck or a freight car. In some embodiments, the frame of the base 1 is made of a corrosion-resistant material to ensure long-term use in humid environments and outdoors. The base 1 is made of high-strength steel or iron with a special coating to withstand high loads and has excellent durability.The base 1 represents a precisely engineered flat balancing base 1, which, together with the telescopic vertical frame, forms a balancing system that evenly distributes weight and ensures stable operation of the crane, even under maximum load conditions. Furthermore, the base 1 is coated with a corrosion-protective coating, and the coating is bright orange to resist the influence of environmental factors such as moisture, rust, and physical wear, ensuring a longer service life. In some embodiments, the base 1 is foldable and equipped with a hinge or a folding frame to facilitate transport and storage.

[0033] In some embodiments, two hinge sockets 21 are provided on the base 1, one hinge socket 21 being slidably connected to the base 1 and hingedly connected to one end of the first hinge arm 22 via a corresponding hinge pin 18, and the other hinge socket 21 being fixed to the base 1 and hingedly connected to one end of the second hinge arm 19 via a corresponding hinge pin 18. In some embodiments, a guide groove is formed on the base 1, and a roller is provided on the lower part of a hinge socket 21, the roller engaging in the guide groove.

[0034] Furthermore, in embodiments in which two pairs of articulated arms are provided, four articulated sockets 21 are provided on the base 1. The articulated sockets 21 corresponding to the first articulated arm 22 in each pair of articulated arms are slidable.

[0035] In some embodiments, a plurality of adjustable feet 20 are permanently mounted beneath the base 1. The adjustable feet 20 are hydraulically telescopic feet to ensure the system's stability on uneven road surfaces and prevent tipping or instability, and are retracted when not in use. In some embodiments, the base 1 is provided with non-slip feet to ensure secure positioning of the crane on different surfaces and prevent unintentional movement during operation.

[0036] In some embodiments, a link 17 is formed on the lifting beam 16, into which the hinge pin 18 at the other end of the second articulated arm 19 slidably engages. In some embodiments, one end of the hydraulic telescopic lever is fixedly connected to the hinge pin 18 at the other end of the first articulated arm 22, and the other end of the hydraulic telescopic lever is fixedly connected to the hinge pin 18 at the other end of the second articulated arm 19. In embodiments in which two pairs of articulated arms are present, two aligned links 17 are formed on the lifting beam 16. The corresponding elongated pin slides in the two aligned links 17. In some embodiments, several hydraulic telescopic levers are provided, the number of which corresponds to the actual requirements.

[0037] In some embodiments, the electric motor 3 is an electric motor with a built-in brake, or the electric motor 3 is coupled to the electric motor winch 2 via a brake. The electric motor is powered by the vehicle battery or an external standard 220V power source. The electric motor 3 has a built-in overload protection function to prevent overheating and ensure safety. With a powerful electric motor, the electric motor 3 is optimized for long-term use and has stable performance. The electric motor 3 uses noise reduction technology, operates more quietly, and is suitable for use in residential and light industrial applications.

[0038] In some embodiments, a guide beam 5 is fixedly provided on the telescopic vertical rail 4, with a second pulley 66 rotatably connected to the central portion of the guide beam 5, through which the rope 7 extends to smoothly guide the hoist rope, reduce wear, and improve performance. In some embodiments, the telescopic vertical rail 4 is a gantry-type rail, and the guide beam 5 is transversely attached to one of the rail segments, except for the lowest rail segment. By precisely manufacturing the first pulley 12, second pulley 6, or loop, the hoist rope 7 is smoothly and efficiently guided, reducing friction and increasing safety.

[0039] In some embodiments, the lifting beam 16 is fixedly connected to the guide beam 5. In some embodiments, the lifting beam 16 and the guide beam 5 are each attached to different locations on the same rail segment or to different rail segments.

[0040] In some embodiments, the boom 10 is pivotally connected to the telescopic vertical rail 4. One end of a hydraulic pitch telescope 9 is pivotally connected to the telescopic vertical rail 4, and the other end of the hydraulic pitch telescope 9 is pivotally connected to the boom 10. The hydraulic pitch telescope 9 is communicatively connected to the controller 31.

[0041] In some embodiments, the boom 10 consists of a plurality of telescoping boom segments 10. One end of a hydraulic telescoping telescope 11 is fixedly connected to one of the boom segments 10, and the other end of the hydraulic telescoping telescope 11 is fixedly connected to another boom segment 10. The hydraulic telescoping telescope 11 is communicatively connected to the controller 31.

[0042] In some embodiments, the boom 10 uses a reinforced arm made of stress-resistant steel. The angle and length of the boom 10 are adjusted by the hydraulic pitching telescope 9 and the hydraulic telescoping telescope 11 to adapt to different crane situations. Furthermore, in some embodiments, both a plurality of hydraulic pitching telescopes 9 and a plurality of hydraulic telescoping telescopes 11 are provided.

[0043] In some embodiments, the hook 13 is forged from steel bar to securely grip and handle the goods. The hook 13 is equipped with safety latches to securely lock the goods in place, preventing accidental disengagement during the lifting process.

[0044] In some embodiments, the cable 7 is a steel cable constructed from an ultra-durable, high-strength steel material to resist wear and tear under high loads. In some embodiments, the surface of the cable 7 is coated with a corrosion inhibitor to significantly extend the service life of the cable 7 and ensure smooth operation in the external environment.

[0045] In some embodiments, the base 1 is provided with a removable, foldable ramp 23 at its rear. In use, the ramp 23 is connected to the vehicle, providing a smooth, non-slip surface for moving goods onto the vehicle to facilitate loading and unloading. Once the goods are secured, the ramp 23 retracts or folds to enable efficient transport.

[0046] In some embodiments, as in Fig. As shown in Figure 4, an overload sensor 27 is provided at the connection point of the rope 7 to the hook 13, which is communicatively connected to the controller 31 to effectively monitor the load. If an overload condition is detected, the controller 31 signals to automatically stop the operation of the crane. In some embodiments, as shown in Fig. As shown in Figure 4, a position sensor 26 is provided at the connection point of the rope 7 to the hook 13. This position sensor is communicatively connected to the controller 31 to monitor and record the movement distance of the goods and thus ensure accurate movement. Upon movement over a certain distance, the controller 31 receives a stop signal that shuts off the power supply to the electric motor 3 or activates the brake in the electric motor 3 to stop the movement. Safety measures further include the integration of an emergency stop button into a control panel 8 to immediately stop the crane in an emergency, protect the crane from possible damage, and prevent accidents.

[0047] In some embodiments, as in Fig.3, the compact folding crane further includes a protective cage 28. The protective cage 28 is provided with a protective pad at the bottom and is securely connected to a sling 29 at the top to ensure stability when lifting or lowering a camel. The protective cage includes an openable door that can be locked by a latch 30. This protective cage is intended to ensure the safety of goods, such as a camel, during lifting and transport. In some embodiments, the protective cage has a modular structure in which different sections of the protective cage are assembled using snap-fit ​​or quick-fastening screws. In some embodiments, the protective cage is made of a lightweight and strong material, such as lightweight steel, a reinforced aluminum alloy, or carbon fiber, thereby ensuring structural integrity.The use of a lightweight material, such as aluminum alloy or carbon fiber, reduces the overall weight of the crane while maintaining strength. During transport, the modular protective cage made of lightweight material can prevent the camel from moving or being impacted. In some embodiments, the protective cage is a flexible or foldable panel made of polycarbonate or aluminum, providing additional protection for the camel while allowing for easy storage.

[0048] In some embodiments, the protective cage also includes a foldable safety belt to securely restrain the camel and limit its movement. The foldable safety belt is made of a durable material, such as reinforced textile, nylon, or steel band, and is lightweight and easy to transport.

[0049] In some embodiments, a platform 15 is mounted on the lifting beam 16. A protective grille 14 is provided on the platform 15, and a control panel 8 of the controller 31 is mounted thereon. The control panel 8 provides user-friendly lifting and lowering control, allowing the operator to safely lift, lower, or stop the crane operation. The control panel 8 is designed as a digital display panel, which allows the weight, angle, and height of the load to be monitored in real time.

[0050] In some embodiments, the electric winch 2 forms a high-performance system for easily attracting and lifting goods. The electric winch 2 is provided with a housing designed to accommodate the rope 7 when the compact folding crane is not in use. The housing is a robust industrial-grade metal housing with high strength properties. The electric winch 2 is equipped with an advanced braking device 25 to ensure controlled lowering of the load, precise control of the load, prevent slipping, and increase overall safety.

[0051] In some embodiments, all components of the compact folding crane are modular, allowing components such as the rope, hook 13, winch, or the like to be easily replaced or upgraded to reduce downtime. All components of the compact folding crane are treated with advanced rust and corrosion protection coatings to prevent rust, corrosion, and wear of the crane, ensuring long-term reliability and durability even under extreme outdoor conditions.

[0052] In some embodiments, the boom 10 is equipped with a safety locking device for securing the position of the boom 10 for long crane work.

[0053] The compact folding crane is lightweight, portable and easy to assemble, and its compact design allows for efficient storage when not in use, making it a practical solution for outdoor use, transporting large animals or as an emergency response.

[0054] It should be noted that the present embodiments only perform optimizations on the hardware structure of the compact folding crane, but do not perform optimizations on the application software in the controller that can be realized by the existing controller. REFERENCE SYMBOL 1 base 2 electric motor winches 3 electric motor 4 telescopic vertical rails 5 leadership carriers 6 second pulley 7 rope 8 Control panel 9 hydraulic telescope for pitching 10 booms 11 hydraulic telescope for telescoping 12 first pulley 13 hooks 14 protective grilles 15 Platform 16 lifting beams 17 backdrop 18 hinge pin 19 second articulated arm 20 adjustable foot 21 joint frame 22 first articulated arm 23 Ramp 24 hydraulic telescopic lever 25 Braking device 26 Position sensor 27 Overload sensor 28 protective cage 29 Loop 30 Locking 31 Control

Claims

[1] Compact folding crane, comprising: a base (1); a telescopic vertical rail (4), the telescopic vertical rail (4) being fixed to the base (1); a boom (10), one end of the boom (10) being movably connected to the upper part of the telescopic vertical rail (4); an electric motor (3), the electric motor (3) being mounted on the base (1); an electromotive winch (2), wherein the electromotive winch (2) is connected to an output shaft of the electric motor (3); a plurality of first pulleys (12), the plurality of first pulleys (12) being rotatably connected to the other end of the boom (10) and the upper part of the telescopic vertical rail (4); a rope (7), the rope (7) being wound around the electromotive winch (2); a hook (13), wherein a free end of the rope (7) extends through the first pulley (12) to connect to the hook (13); and a controller (31), wherein the controller (31) is communicatively connected to the electric motor (3); characterized by , that the compact folding crane further comprises a lifting beam (16), paired articulated arms, a plurality of hinge pins (18) and a hydraulic telescopic lever (24); that the telescopic vertical rail (4) comprises a plurality of rail segments which are telescopic, wherein the lifting support (16) is fixedly connected to one of the plurality of rail segments, with the exception of a lowermost rail segment; that the paired articulated arms comprise a first articulated arm (22) and a second articulated arm (19), wherein the middle part of the first articulated arm (22) and the middle part of the second articulated arm (19) are rotatably connected by a hinge pin (18); wherein one end of the first articulated arm (22) is articulated and displaceably connected to the base (1) by a corresponding hinge pin (18), and the other end of the first articulated arm (22) is articulated to the lifting support (16) by a corresponding hinge pin (18); wherein one end of the second articulated arm (19) is articulated to the base (1) by a corresponding hinge pin (18), the other end of the second articulated arm (19) is articulated and displaceably connected to the lifting support (16) by a corresponding hinge pin (18); that the hydraulic telescopic lever (24) is fixedly connected at one end to the first articulated arm (22) and at the other end to the second articulated arm (19), wherein the hydraulic telescopic lever (24) is communicatively connected to the controller (31), and wherein the hydraulic telescopic lever (24) is controlled to press the first articulated arm (22) and the second articulated arm (19) away from each other or towards each other. [2] Compact folding crane according to claim 1, characterized by that two articulated sockets (21) are provided on the base (1), wherein one articulated socket is slidably connected to the base (1) and is articulated to one end of the first articulated arm (22) via a corresponding articulated pin (18), and wherein the other articulated socket is fastened to the base (1) and is articulated to one end of the second articulated arm (19) via a corresponding articulated pin (18). [3] Compact folding crane according to claim 2, characterized by that a guide groove is formed on the base (1), and a roller is provided on the lower part of one joint socket, wherein the roller engages in the guide groove. [4] Compact folding crane according to claim 1, characterized by that a link (17) is formed on the lifting support (16), into which the hinge pin (18) at the other end of the second hinge arm (19) engages displaceably. [5] Compact folding crane according to claim 1, characterized by that one end of the hydraulic telescopic lever (24) is fixedly connected to the hinge pin (18) at the other end of the first articulated arm (22), and the other end of the hydraulic telescopic lever (24) is fixedly connected to the hinge pin (18) at the other end of the second articulated arm (19). [6] Compact folding crane according to claim 1, characterized bythat the base (1) has a frame structure; that the base (1) is provided with a plurality of screws or hooks, and the base (1) is configured to be connected to the chassis of a vehicle by a plurality of screws or hooks. [7] Compact folding crane according to claim 1, characterized by that the electric motor (3) is an electric motor with a built-in brake, or that the electric motor (3) is coupled to the electric motor winch (2) via a brake; that the electric motor (3) is powered by the vehicle battery or an external energy source. [8] Compact folding crane according to claim 1, characterized by that a guide support (5) is provided fixedly on the telescopic vertical rail (4), wherein a second cable pulley (6) is rotatably connected to the central part of the guide support (5), through which the cable (7) extends. [9] Compact folding crane according to claim 8, characterized by that the lifting support (16) is firmly connected to the guide support (5). [10] Compact folding crane according to claim 1, characterized by that the boom (10) is articulated to the telescopic vertical rail (4), that one end of a hydraulic telescope for pitching (9) is articulated to the telescopic vertical rail (4), and the other end of the hydraulic telescope for pitching (9) is articulated to the boom (10), and that the hydraulic telescope for pitching (9) is communicatively connected to the controller (31). [11] Compact folding crane according to claim 1, characterized bythat the boom (10) comprises a plurality of telescopic boom segments, that one end of a hydraulic telescope for telescoping (11) is fixedly connected to one of the boom segments, and the other end of the hydraulic telescope for telescoping (11) is fixedly connected to another boom segment, and that the hydraulic telescope for telescoping (11) is communicatively connected to the controller (31). [12] Compact folding crane according to claim 1, characterized by that the hook (13) is forged from steel rod; that the hook (13) is equipped with safety locks. [13] Compact folding crane according to claim 1, characterized by that a plurality of adjustable feet (20) are fixedly connected under the base (1), wherein the adjustable feet (20) are hydraulic telescopic feet. [14] Compact folding crane according to claim 1, characterized bythat the base (1) is provided with a removable, foldable ramp (23) on its rear side. [15] Compact folding crane according to claim 1, characterized by that an overload sensor (27) is provided at the connection point of the rope (7) with the hook (13), which is communicatively connected to the control (31). [16] Compact folding crane according to claim 1, characterized by that a position sensor (26) is provided at the connection point of the rope (7) with the hook (13), which is communicatively connected to the controller (31). [17] Compact folding crane according to claim 1, characterized by that the compact foldable crane further comprises a protective cage (28), that the protective cage (28) is provided with a protective pad on the bottom, and that the protective cage (28) comprises an openable door which can be locked by a lock (30). [18] Compact folding crane according to claim 17, characterized bythat the protective cage (28) uses a modular structure in which different sections of the protective cage (28) are assembled using snap-fit ​​connections or quick-fix screws. [19] Compact folding crane according to claim 1, characterized by that a platform (15) is fastened to the lifting support (16), that a protective grille (14) is provided on the platform (15) and that an operating panel (8) of the control (31) is attached. [20] Compact folding crane according to claim 1, characterized by that the electric motor winch (2) is provided with a housing which is designed to accommodate the rope (7) when the compact folding crane is not in use.

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