Hoisting device for purline

Abstract

The invention relates to the technical field of building construction, and discloses a purline hoisting device which comprises a crawler, a first rotating arm, a second rotating arm, a first hydraulic cylinder, a second hydraulic cylinder, a pulley assembly and a winding assembly. Each pulley assembly comprises two paired pulleys, and the winding assembly comprises a lifting rope capable of being released or wound. During use, the first hydraulic cylinder is controlled to work, and the first rotating arm can rotate relative to the crawler. The second hydraulic cylinder is controlled to work, and the second rotating arm can rotate relative to the first rotating arm. And the winding assembly is controlled to work, so that the lifting rope can be wound or released. Therefore, through cooperative work of the first hydraulic cylinder, the second hydraulic cylinder and the winding assembly, the purline can be hoisted to the roof from the ground, and the hoisting work of the purline is completed. Moreover, in the process that the lifting rope is wound or released, the lifting rope sequentially penetrates through the multiple pairs of pulleys, so that the lifting rope can be surrounded by the two paired pulleys, and the lifting rope is prevented from falling off from the two paired pulleys.

Description

Technical Field

[0001] This application relates to the field of construction technology, and particularly to a hoisting device for purlins. Background Art

[0002] A hoisting structure for hoisting roof purlins disclosed in the related technology (Publication No.: CN216997258U) includes a hook ring, a hoisting belt, and a towing rope. The hoisting belts are n in number, where n is a natural number greater than or equal to 2. The lengths of the n hoisting belts are set to increase in a gradient of 2m. Each hoisting belt is respectively hung on the hook ring, and each hoisting belt corresponds to fixing one purlin. The hook ring includes a ring buckle, a shaft rod, and a locking nut. The upper end of the ring buckle presses on the hoisting belt, and the lower end of the ring buckle is locked and fixed through the shaft rod and the locking nut, so that the hoisting belt and the hook both pass through the hook ring. The towing ropes are n in number, and each purlin corresponds to fixing one towing rope.

[0003] In the process of implementing the technical solution of the present disclosure, it is found that at least the following problems exist in the related technology:

[0004] For the hoisting structure for hoisting roof purlins, during the hoisting process, multiple (at least two) purlins can be hoisted in one hook drop, reducing the hook drop frequency, shortening the hook drop time, and improving the hoisting efficiency. At the same time, due to the reduction of the hook drop frequency, the risk coefficient is reduced, which has certain advantages for operations in complex on-site environments. However, this hoisting structure for hoisting roof purlins needs to be used in conjunction with a crane, and the lifting ropes of traditional cranes are prone to falling off risks during the hoisting process.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] To have a basic understanding of some aspects of the disclosed technical solutions, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or delineate the protection scope of these technical solutions, but rather serves as a preface to the subsequent detailed description.

[0007] The technical solution of the present disclosure provides a hoisting device for purlins to solve the problems raised in the above background art.

[0008] In some technical solutions, the hoisting device for a purlin includes: a crawler vehicle; a first rotating arm rotatably mounted on the crawler vehicle; a second rotating arm rotatably mounted on the first rotating arm; a first hydraulic cylinder rotatably mounted between the crawler vehicle and the first rotating arm and configured to drive the first rotating arm to rotate relative to the crawler vehicle; a second hydraulic cylinder rotatably mounted between the first rotating arm and the second rotating arm and configured to drive the second rotating arm to rotate relative to the first rotating arm; a pulley assembly evenly mounted on the first rotating arm and the second rotating arm, each pulley assembly including two paired pulleys, and meshing teeth being provided on the edge of each pulley, and the meshing teeth on the edges of the two paired pulleys meshing with each other; a winding assembly mounted on the crawler vehicle, the winding assembly including a lifting rope that can be released or wound, and the lifting rope passing through multiple pairs of the pulleys in sequence; wherein, under the drive of the first hydraulic cylinder and the second hydraulic cylinder, the lifting heights of the first rotating arm and the second rotating arm are changed.

[0009] Optionally, each pulley assembly further includes: a U-shaped plate, one of the opposite side walls of the U-shaped plate being connected to the first rotating arm or the second rotating arm; a third hydraulic cylinder mounted on the other of the opposite side walls of the U-shaped plate; a moving plate mounted on the moving end of the third hydraulic cylinder and located inside the U-shaped plate; a moving seat located inside the U-shaped plate and opposite to the moving plate, and one of the two paired pulleys being rotatably mounted on the moving seat; a spring evenly mounted between the moving seat and the moving plate along the movement direction of the moving end of the third hydraulic cylinder; a fixed seat mounted on the inner wall of the U-shaped plate and opposite to the moving seat, and the other of the two paired pulleys being rotatably mounted on the fixed seat; wherein, under the drive of the third hydraulic cylinder, a plurality of the springs are compressed, and the meshing teeth on the edges of the two paired pulleys mesh with each other.

[0010] Optionally, each pulley assembly further includes: guide rails evenly mounted on the inner wall of the U-shaped plate along the movement direction of the moving end of the third hydraulic cylinder, and the straight lines where the plurality of guide rails are located being parallel to each other; sliders respectively slidably mounted on the plurality of guide rails and each connected to the moving plate.

[0011] Optionally, each pulley assembly further includes: guide shafts respectively slidably penetrating through the plurality of moving plates along the movement direction of the moving end of the third hydraulic cylinder, one ends of the plurality of guide shafts being connected to the moving seat; fixed rings respectively mounted on the other ends of the plurality of guide shafts; wherein, the plurality of springs are respectively sleeved on the plurality of guide shafts.

[0012] Optionally, each of the pulley assemblies further includes: linear bearings, which are respectively sleeved on a plurality of the guide shafts and are all mounted on the moving plate.

[0013] Optionally, each of the pulley assemblies further includes: metal gaskets, which are respectively sleeved on a plurality of the guide shafts and are respectively located at the contact positions between a plurality of the springs and the moving plate and the moving seat.

[0014] Optionally, the winding assembly further includes: a support seat mounted on the crawler vehicle; a rotating shaft rotatably mounted on the support seat; a winding disc mounted on the rotating shaft, and the lifting rope is wound around the winding disc; wherein, the rotating shaft can be controlled to rotate so as to drive the winding disc to release or store the lifting rope.

[0015] Optionally, the winding assembly further includes: a motor mounted on the crawler vehicle, the axis of the rotating end of the motor being parallel to the axis of the rotating shaft; a driving pulley mounted on the rotating end of the motor; a driven pulley mounted on the rotating shaft; a belt sleeved between the driving pulley and the driven pulley; wherein, the diameter of the driving pulley is smaller than the diameter of the driven pulley.

[0016] Optionally, the winding assembly further includes: a bearing mounted between the support seat and the rotating shaft.

[0017] Optionally, it further includes: a hook mounted on the lifting rope for lifting the bundled purlins.

[0018] A purlin lifting device provided by the technical solution of the present disclosure can achieve the following technical effects:

[0019] A hoisting device for purlins provided by the technical solution of the present disclosure includes a crawler vehicle, a first rotating arm, a second rotating arm, a first hydraulic cylinder, a second hydraulic cylinder, a pulley assembly, and a winding assembly. The crawler vehicle is used to drive the entire device to move, and has the advantages of small unit pressure on the ground and strong driving ability. It is suitable for construction machinery vehicles to operate under harsh conditions, such as snow, slopes, grasslands, paddy fields, swamps, muddy farm roads, rugged mountain roads, soft deserts, etc. The first rotating arm is rotatably installed on the crawler vehicle and can rotate relative to the crawler vehicle. The second rotating arm is rotatably installed on the first rotating arm and can rotate relative to the first rotating shaft. The first hydraulic cylinder is rotatably installed between the crawler vehicle and the first rotating arm, and the tail end and the mobile end of the first hydraulic cylinder can rotate relative to the crawler vehicle and the first rotating arm respectively. The first hydraulic cylinder is used to provide driving force to drive the first rotating arm to rotate relative to the crawler vehicle. The second hydraulic cylinder is rotatably installed between the first rotating arm and the second rotating arm, and the tail end and the mobile end of the second hydraulic cylinder can rotate relative to the first rotating arm and the second rotating arm respectively. The second hydraulic cylinder is used to provide driving force to drive the second rotating arm to rotate relative to the first rotating arm. The pulley assemblies are evenly installed on the first rotating arm and the second rotating arm. The pulley assemblies on the first rotating arm and the second rotating arm are both used to play a guiding role and change the direction of the acting force. Each pulley assembly includes two paired pulleys, and meshing teeth are provided on the edge of each pulley. The meshing teeth on the edges of the two paired pulleys mesh with each other, so that one of the two paired pulleys can rotate in the opposite direction as the other rotates. The winding assembly is installed on the crawler vehicle, and the winding assembly includes a lifting rope that can be released or wound. After the lifting rope passes through multiple pairs of pulleys in sequence, it is used to lift the bundled purlins. Among them, under the drive of the first hydraulic cylinder and the second hydraulic cylinder, the lifting heights of the first rotating arm and the second rotating arm change.

[0020] During use, control the first hydraulic cylinder to work. Under the push or pull of the mobile end of the first hydraulic cylinder, the first rotating arm can rotate relative to the crawler vehicle. Control the second hydraulic cylinder to work. Under the push or pull of the mobile end of the second hydraulic cylinder, the second rotating arm can rotate relative to the first rotating arm, and finally adjust the lifting position and lifting height. Control the winding assembly to work, and the lifting rope can be wound or released, thereby driving the bundled purlins to move up and down. Therefore, through the coordinated work of the first hydraulic cylinder, the second hydraulic cylinder, and the winding assembly, the purlins can be lifted from the ground to the roof to complete the hoisting work of the purlins. Moreover, during the process of the lifting rope being wound or released, since the lifting rope passes through multiple pairs of pulleys in sequence, it can be surrounded by two paired pulleys, thereby preventing the lifting rope from falling off between the two paired pulleys. And through the design of the meshing teeth, the meshing teeth on the edges of the two paired pulleys can mesh with each other, so that one of the two paired pulleys can rotate in the opposite direction as the other rotates. This can prevent the two paired pulleys from slipping relative to each other and causing wear and damage at the edges, ensuring the transmission effect.

[0021] The above general description and the following description are only exemplary and explanatory, and are not intended to limit this application. Description of the Drawings

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is the front view structural schematic diagram of a purlin hoisting device provided by an embodiment of the present disclosure;

[0024] Figure 2 is Figure 1 the enlarged structural schematic diagram at A in

[0025] Figure 3 is Figure 1 the enlarged structural schematic diagram at B in

[0026] Figure 4 is Figure 1 the enlarged structural schematic diagram at C in

[0027] Figure 5 is Figure 1 the enlarged structural schematic diagram at D in

[0028] Figure 6 is the side view structural schematic diagram of a pulley assembly of a purlin hoisting device provided by an embodiment of the present disclosure;

[0029] Figure 7 is the left view structural schematic diagram of a winding assembly of a purlin hoisting device provided by an embodiment of the present disclosure;

[0030] Figure 8 is the right view structural schematic diagram of a winding assembly of a purlin hoisting device provided by an embodiment of the present disclosure.

[0031] Reference Numerals:

[0032] 100, crawler vehicle; 200, first rotating arm; 300, second rotating arm; 400, first hydraulic cylinder; 500, second hydraulic cylinder; 600, pulley assembly; 601, pulley; 602, C-shaped plate; 603, third hydraulic cylinder; 604, moving plate; 605, moving seat; 606, spring; 607, fixed seat; 608, guide rail; 609, slider; 610, guide shaft; 611, fixed ring; 612, linear bearing; 700, winding assembly; 701, lifting rope; 702, support seat; 703, rotating shaft; 704, winding disc; 705, motor; 706, driving pulley; 707, driven pulley; 800, hook. Detailed implementation manners

[0033] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and explanation, and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0034] In the specification, claims and above-mentioned drawings of the embodiments of the present disclosure, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] In the embodiments of the present disclosure, the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent orientation or positional relationships, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] In addition, the terms "arranged", "connected", "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] Unless otherwise specified, the term "plurality" means two or more.

[0038] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0039] The term "and / or" describes the relationship between objects and indicates that three relationships can exist. For example, A and / or B means: A or B, or, A and B, these three relationships.

[0040] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0041] Combined Figures 1 to 8 As shown, the embodiment of the present disclosure provides a hoisting device for purlins, including a crawler vehicle 100, a first swing arm 200, a second swing arm 300, a first hydraulic cylinder 400, a second hydraulic cylinder 500, a pulley assembly 600, and a winding assembly 700. The crawler vehicle 100 is used to drive the entire device to move, and has the advantages of small unit pressure on the ground and strong driving ability, and is suitable for construction machinery vehicles to operate under harsh conditions, such as snow, hillside, grassland, paddy field, swamp, muddy field road, rugged mountain road, soft desert, etc. The first swing arm 200 is rotatably installed on the crawler vehicle 100 and can rotate relative to the crawler vehicle 100. The second swing arm 300 is rotatably installed on the first swing arm 200 and can rotate relative to the first rotating shaft 703. The first hydraulic cylinder 400 is rotatably installed between the crawler vehicle 100 and the first swing arm 200, and the tail end and the mobile end of the first hydraulic cylinder 400 can rotate relative to the crawler vehicle 100 and the first swing arm 200 respectively. The first hydraulic cylinder 400 is used to provide driving force to drive the first swing arm 200 to rotate relative to the crawler vehicle 100. The second hydraulic cylinder 500 is rotatably installed between the first swing arm 200 and the second swing arm 300, and the tail end and the mobile end of the second hydraulic cylinder 500 can rotate relative to the first swing arm 200 and the second swing arm 300 respectively. The second hydraulic cylinder 500 is used to provide driving force to drive the second swing arm 300 to rotate relative to the first swing arm 200. The pulley assembly 600 is evenly installed on the first swing arm 200 and the second swing arm 300. The pulley assemblies 600 on the first swing arm 200 and the second swing arm 300 are both used for guiding and changing the direction of the acting force. Each pulley assembly 600 includes two paired pulleys 601. Meshing teeth are provided on the edges of each pulley 601, and the meshing teeth on the edges of the two paired pulleys 601 mesh with each other so that one of the two paired pulleys 601 can rotate in the opposite direction as the other rotates. The winding assembly 700 is installed on the crawler vehicle 100. The winding assembly 700 includes a lifting rope 701 that can be released or wound. After the lifting rope 701 passes through multiple pairs of pulleys 601 in sequence, it is used to lift the bundled purlins. Among them, under the drive of the first hydraulic cylinder 400 and the second hydraulic cylinder 500, the lifting heights of the first swing arm 200 and the second swing arm 300 change.

[0042] A hoisting device for purlins provided by an embodiment of the present disclosure controls the operation of the first hydraulic cylinder 400. Under the pushing or pulling of the moving end of the first hydraulic cylinder 400, the first rotating arm 200 can rotate relative to the crawler vehicle 100. By controlling the operation of the second hydraulic cylinder 500, under the pushing or pulling of the moving end of the second hydraulic cylinder 500, the second rotating arm 300 can rotate relative to the first rotating arm 200, and finally the hoisting position and hoisting height are adjusted. By controlling the operation of the winding assembly 700, the hoisting rope 701 can be wound or released, thereby driving the bundled purlins to move up and down. Therefore, through the coordinated operation of the first hydraulic cylinder 400, the second hydraulic cylinder 500 and the winding assembly 700, the purlins can be hoisted from the ground to the roof to complete the hoisting work of the purlins. Moreover, during the process of winding or releasing the hoisting rope 701, since the hoisting rope 701 passes through multiple pairs of pulleys 601 in sequence, it can be surrounded by a pair of two pulleys 601, thereby preventing the hoisting rope 701 from falling off between the pair of two pulleys 601. Additionally, through the design of meshing teeth, the meshing teeth on the edges of a pair of two pulleys 601 can be meshed with each other, so that one of the pair of two pulleys 601 can rotate in the opposite direction as the other rotates. This can prevent the pair of two pulleys 601 from slipping relative to each other and causing wear and damage at the edges, ensuring the transmission effect.

[0043] Optionally, in combination with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, each pulley assembly 600 further includes a C-shaped plate 602, a third hydraulic cylinder 603, a moving plate 604, a moving seat 605, a spring 606 and a fixed seat 607. One of the opposite side walls of the C-shaped plate 602 is connected to the first rotating arm 200 or the second rotating arm 300, and the plurality of C-shaped plates 602 of the plurality of pulley assemblies 600 are evenly installed on the first rotating arm 200 and the second rotating arm 300. The third hydraulic cylinder 603 is installed on the other of the opposite side walls of the C-shaped plate 602 for providing a driving force to achieve a linear movement function. The moving plate 604 is installed on the moving end of the third hydraulic cylinder 603 and is located inside the C-shaped plate 602, and moves under the drive of the plurality of third hydraulic cylinders 603 respectively. The moving seat 605 is located inside the C-shaped plate 602 and is opposite to the moving plate 604. One of the pair of two pulleys 601 is rotatably installed on the moving seat 605 and can rotate relative to the moving seat 605. The spring 606 is evenly installed between the moving seat 605 and the moving plate 604 along the movement direction of the moving end of the third hydraulic cylinder 603, and is used to provide an elastic force so that the moving seat 605 has a tendency to move away from the moving plate 604. The fixed seat 607 is installed on the inner wall of the C-shaped plate 602 and is opposite to the moving seat 605. Under the elastic force of the plurality of springs 606, the moving seat 605 has a tendency to move close to the fixed seat 607. The other of the pair of two pulleys 601 is rotatably installed on the fixed seat 607 and can rotate relative to the fixed seat 607. Among them, under the drive of the third hydraulic cylinder 603, the plurality of springs 606 are compressed, and the meshing teeth on the edges of the pair of two pulleys 601 are meshed with each other.

[0044] In the embodiment of the present disclosure, controlling the third hydraulic cylinder 603 to work can drive the moving plate 604 to move. Then, under the drive of the plurality of springs 606, the moving seat 605 can move close to the fixed seat 607, and finally the meshing teeth on the edges of the pair of two pulleys 601 are meshed with each other. Thereby surrounding the lifting rope 701 to prevent the lifting rope 701 from falling off between the pair of two pulleys 601. And, through the design of the plurality of springs 606, the moving seat 605 has a tendency to move close to the fixed seat 607, and further there is a tendency of relative movement between the pair of two pulleys 601. Therefore, after the tooth tip of one of the pair of two pulleys 601 abuts against the tooth tip of the other, when one of the pair of two pulleys 601 rotates under the drive of the lifting rope 701, the other pulley 601 will automatically engage with it without pre-adjusting the initial positions of the pair of two pulleys 601.

[0045] Optionally, in combination with Figure 6As shown, each pulley assembly 600 further includes a guide rail 608 and a slider 609. The guide rail 608 is uniformly installed on the inner wall of the C-shaped plate 602 along the moving direction of the moving end of the third hydraulic cylinder 603, and the straight lines where multiple guide rails 608 are located are parallel to each other. The sliders 609 are respectively slidably installed on multiple guide rails 608 and are all connected to the moving plate 604.

[0046] In the embodiment of the present disclosure, each pulley assembly 600 further includes multiple guide rails 608 and sliders 609 slidably installed on multiple guide rails 608. The multiple guide rails 608 and the multiple sliders 609 together play a role of guiding and supporting, so as to improve the stability of the moving plate 604 during movement and reduce the radial force received by the moving end of the third hydraulic cylinder 603.

[0047] Optionally, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , each pulley assembly 600 further includes a guide shaft 610 and a fixing ring 611. The guide shaft 610 is respectively slidably inserted through multiple moving plates 604 along the moving direction of the moving end of the third hydraulic cylinder 603. One ends of the multiple guide shafts 610 are all connected to the moving seat 605 and are all used to play a role of guiding and supporting. The fixing rings 611 are respectively installed at the other ends of the multiple guide shafts 610 and are all used to play a role of limiting. Among them, multiple springs 606 are respectively sleeved on the multiple guide shafts 610.

[0048] In the embodiment of the present disclosure, each pulley assembly 600 further includes multiple guide shafts 610 and multiple fixing rings 611. The multiple guide shafts 610 are all used to play a role of guiding and supporting, so that the moving seat 605 can only move along the axial direction of the multiple guide shafts 610, avoiding the moving seat 605 from bouncing due to the elasticity of the multiple springs 606. The multiple fixing rings 611 are all used to play a role of limiting, so as to prevent the multiple guide shafts 610 from falling off the moving plate 604 and adjust the maximum elongation of the multiple springs 606. And, by adopting the design of sleeving multiple springs 606 on the multiple guide shafts 610 respectively, the installation effect of the multiple springs 606 can be improved, and the multiple springs 606 can be prevented from falling off between the moving seat 605 and the moving plate 604.

[0049] Optionally, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , each pulley assembly 600 further includes a linear bearing 612. The linear bearings 612 are respectively sleeved on the multiple guide shafts 610 and are all installed on the moving plate 604.

[0050] In the embodiments of the present disclosure, each pulley assembly 600 further includes linear bearings 612 that are respectively sleeved on a plurality of guide shafts 610 and are all mounted on the moving plate 604. The plurality of linear bearings 612 are used to reduce the frictional force between the plurality of guide shafts 610 and the moving plate 604 and improve the accuracy when the plurality of guide shafts 610 slide relative to the moving plate 604.

[0051] Optionally, each pulley assembly 600 further includes metal gaskets. The metal gaskets are respectively sleeved on the plurality of guide shafts 610 and are respectively located at the contact positions between the plurality of springs 606 and the moving plate 604 and the moving seat 605.

[0052] In the embodiments of the present disclosure, each pulley assembly 600 further includes metal gaskets that are respectively sleeved on the plurality of guide shafts 610 and are respectively located at the contact positions between the plurality of springs 606 and the moving plate 604 and the moving seat 605. The plurality of metal gaskets are all used for protection to prevent the contact positions between the plurality of springs 606 and the moving plate 604 and the moving seat 605 from being worn and damaged by the plurality of metal gaskets.

[0053] Optionally, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 , each pulley assembly 600 further includes a floating joint. The floating joint is mounted between the moving end of the third hydraulic cylinder 603 and the moving plate 604.

[0054] In the embodiments of the present disclosure, each pulley assembly 600 further includes a floating joint mounted between the moving end of the third hydraulic cylinder 603 and the moving plate 604. The working principle of the floating joint is to use the movable connection method of the internal spherical surface to achieve the offset and angle adjustment between the connecting components through the rotation and inclination of the spherical surface. In the hydraulic system, the cylinder floating joint allows the piston rod to have a certain offset and angle adjustment during operation, so as to ensure the normal operation of the system and extend the service life of the equipment.

[0055] Optionally, as shown in Figure 7 and Figure 8 , the winding assembly 700 further includes a support seat 702, a rotating shaft 703 and a winding disc 704. The support seat 702 is mounted on the tracked vehicle 100 and is used to support and mount the rotatable rotating shaft 703. The rotating shaft 703 is rotatably mounted on the support seat 702 and can perform a rotational motion relative to the support seat 702. The winding disc 704 is mounted on the rotating shaft 703 and rotates driven by the rotating shaft 703. The lifting rope 701 is wound around the winding disc 704 and is released or wound by the winding disc 704. Among them, the rotating shaft 703 can be controlled to rotate to drive the winding disc 704 to release or store the lifting rope 701.

[0056] In the embodiments of the present disclosure, when the rotating shaft 703 makes a rotational movement under the drive of an external force, the winding disc 704 can be driven to rotate, thereby releasing or winding the lifting rope 701, and finally driving the bundled purlin to move up and down. Cooperating with the first hydraulic cylinder 400 and the second hydraulic cylinder 500, the purlin can be lifted from the ground to the roof to complete the lifting work of the purlin.

[0057] Optionally, as shown in Figure 7 and Figure 8 , the winding assembly 700 further includes a motor 705, a driving pulley 706, a driven pulley 707 and a belt. The motor 705 is installed on the crawler vehicle 100, and the axis of the rotating end of the motor 705 is parallel to the axis of the rotating shaft 703, and is used to provide driving force to realize the rotational movement function. The driving pulley 706 is installed on the rotating end of the motor 705 and rotates under the drive of the motor 705. The driven pulley 707 is installed on the rotating shaft 703 and is used to drive the rotating shaft 703 to make a rotational movement. The belt is sleeved between the driving pulley 706 and the driven pulley 707 and is used to transmit the driving force so that the driven pulley 707 can rotate with the rotation of the driving pulley 706. Among them, the diameter size of the driving pulley 706 is smaller than the diameter size of the driven pulley 707.

[0058] In the embodiments of the present disclosure, controlling the motor 705 to work can drive the driving pulley 706 to make a rotational movement. Through the belt, the driven pulley 707 can be driven to make a rotational movement. Further drive the rotating shaft 703 to make a rotational movement, and finally realize the automatic release or winding function of the lifting rope 701, so as to facilitate the lifting work. Moreover, using the motor 705 as the power source is very convenient to use and control, and has the capabilities of self-starting, accelerating, braking, reversing, holding, etc., and can meet various operating requirements.

[0059] Optionally, the winding assembly 700 further includes a bearing. The bearing is installed between the support seat 702 and the rotating shaft 703.

[0060] In the embodiments of the present disclosure, the winding assembly 700 further includes a bearing installed between the support seat 702 and the rotating shaft 703. The bearing is used to reduce the friction between the support seat 702 and the rotating shaft 703 and improve the accuracy when the rotating shaft 703 rotates relative to the support seat 702. Further improve the rotation accuracy of the winding disc 704, and finally improve the release or winding effect of the lifting rope 701.

[0061] Optionally, as shown in Figure 1 and Figure 5 , a hook 800 is further included. The hook 800 is installed on the lifting rope 701 and is used to lift the bundled purlin.

[0062] In the embodiments of the present disclosure, it further includes a hook 800 installed on the suspension rope 701. The hook 800 is used to lift the bundled purlins. As a common mechanical accessory, the hook 800 is widely used in industries, construction, logistics and other fields. It has unique designs and functions, can carry and suspend heavy objects, improve work efficiency and ensure safety.

[0063] The above description and the drawings fully disclose the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A hoisting device for purlins, characterized in that, Comprising: Crawler vehicle; First swing arm, rotatably mounted on the crawler vehicle; Second swing arm, rotatably mounted on the first swing arm; First hydraulic cylinder, rotatably mounted between the crawler vehicle and the first swing arm, configured to drive the first swing arm to rotate relative to the crawler vehicle; Second hydraulic cylinder, rotatably mounted between the first swing arm and the second swing arm, configured to drive the second swing arm to rotate relative to the first swing arm; Pulley assemblies, evenly mounted on the first swing arm and the second swing arm, each pulley assembly includes two paired pulleys, and engaging teeth are provided on the edge of each pulley, and the engaging teeth on the edges of the two paired pulleys mesh with each other; Winching assembly, mounted on the crawler vehicle, the winching assembly includes a lifting rope that can be released or wound, and the lifting rope passes through multiple pairs of pulleys in sequence; Wherein, under the drive of the first hydraulic cylinder and the second hydraulic cylinder, the lifting heights of the first swing arm and the second swing arm are changed.

2. The hoisting device for a purlin according to claim 1, wherein Each pulley assembly further includes: C-shaped plate, one of the opposite side walls of the C-shaped plate is connected to the first swing arm or the second swing arm; Third hydraulic cylinder, mounted on the other of the opposite side walls of the C-shaped plate; Moving plate, mounted on the moving end of the third hydraulic cylinder and located inside the C-shaped plate; Moving seat, located inside the C-shaped plate and opposite to the moving plate, and one of the two paired pulleys is rotatably mounted on the moving seat; Spring, evenly mounted between the moving seat and the moving plate along the movement direction of the moving end of the third hydraulic cylinder; Fixed seat, mounted on the inner wall of the C-shaped plate and opposite to the moving seat, and the other of the two paired pulleys is rotatably mounted on the fixed seat; Wherein, under the drive of the third hydraulic cylinder, multiple springs are compressed, and the engaging teeth on the edges of the two paired pulleys mesh with each other.

3. The hoisting device for purlins according to claim 2, wherein Each pulley assembly further includes: Guide rails, evenly mounted on the inner wall of the C-shaped plate along the movement direction of the moving end of the third hydraulic cylinder, and the straight lines where multiple guide rails are located are parallel to each other; Sliders, respectively slidably mounted on multiple guide rails and all connected to the moving plate.

4. The hoisting device for purlins according to claim 2, characterized in that, Each pulley assembly further includes: Guide shafts, respectively slidably passing through multiple moving plates along the movement direction of the moving end of the third hydraulic cylinder, and one ends of multiple guide shafts are all connected to the moving seat; Fixed rings, respectively mounted on the other ends of multiple guide shafts; Wherein, multiple springs are respectively sleeved on multiple guide shafts.

5. The hoisting device for purlins according to claim 4, characterized in that, Each pulley assembly further includes: Linear bearings, respectively sleeved on multiple guide shafts and all mounted on the moving plate.

6. The hoisting device for purlins according to claim 4, characterized in that, Each pulley assembly further includes: Metal gaskets, respectively sleeved on multiple guide shafts and respectively located at the contact positions of multiple springs with the moving plate and the moving seat.

7. The hoisting device for purlins according to claim 1, characterized in that, The winching assembly further includes: Support seat, mounted on the crawler vehicle; Rotating shaft, rotatably mounted on the support seat; Winching disc, mounted on the rotating shaft, and the lifting rope is wound around the winching disc; Wherein, the rotating shaft can be controllably rotated to drive the winding disc to release or store the suspension rope.

8. The hoisting device for a purlin according to claim 7, characterized in that, The winding assembly further includes: A motor, installed on the crawler vehicle, and the axis of the rotating end of the motor is parallel to the axis of the rotating shaft; A driving pulley, installed on the rotating end of the motor; A driven pulley, installed on the rotating shaft; A belt, sleeved between the driving pulley and the driven pulley; Wherein, the diameter of the driving pulley is smaller than the diameter of the driven pulley.

9. The hoisting device for purlins according to claim 7, characterized in that, The winding assembly further includes: A bearing, installed between the support seat and the rotating shaft.

10. A hoisting device for purlins according to any one of claims 1 to 9, characterized in that, It further includes: A hook, installed on the suspension rope for lifting the bundled purlins.

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