Mobile crane

Abstract

The utility model relates to the technical field of cranes, in particular to a mobile crane, which comprises a connecting bottom plate capable of being quickly detached at the bottom of a supporting structure, and pulleys capable of sliding in a spiral chute at the bottom of the supporting structure to realize extension and retraction, the device can rapidly move in the internal environment and the external environment and switch the hoisting mode, the supporting beam is supported through the supporting structure, the hoisting height is adjusted, the hoisting structure adjusts the vertical falling position of the hoisting cable in the device, and different positions of a heavy object are fixedly hoisted. According to the utility model, the supporting structure is arranged to quickly move in an external environment to carry out hoisting operation, and the hoisting structure is arranged to improve the applicability to different types of heavy objects.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, and in particular to a mobile crane. Background Art

[0002] A crane is a mechanical device used to move and carry heavy objects vertically in various construction, transportation and industrial applications. A crane usually has a hook suspended in the air, which is raised and lowered by the crane's power system and can be moved horizontally to carry heavy objects between different locations. Mobile cranes can be moved to a variety of working environments, but when working in outdoor environments, the rough and rugged road environment usually requires manual cleaning before lifting operations can be carried out, which is time-consuming and labor-intensive.

[0003] The Chinese utility model patent with the name of "A Mobile Crane" and the publication number CN220223291U that has been published includes the following components: a moving plate is located at the bottom of the entire device, and a moving wheel is installed on its lower surface so that it can move freely in the entire working area. A support frame is fixedly installed on the upper surface of the moving plate to support other components and maintain the stability of the overall structure. A fixed plate is installed in the support frame, and a connecting plate is provided on its upper surface. The connecting plate is installed on the upper surface of the fixed plate, and a fixing pin passes through its upper surface. The fixing pin passes through the connecting plate and penetrates into the fixed plate to connect and fix the components. The mobile crane can effectively prevent the goods from shaking during the movement of the components, reduce the impact of the shaking of the goods on the normal movement of the device, and thereby enhance the use effect of the components in the device during the working process. However, there are not many applicable environments, and it is not possible to maintain stability for heavy objects of different sizes and shapes. Utility Model Content

[0004] The purpose of the present application is to provide a mobile crane, which solves the technical problems of quickly performing lifting operations in different working environments and stably lifting heavy objects of different shapes and sizes.

[0005] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0006] The utility model provides a mobile crane, comprising a connecting bottom plate which can be quickly disassembled at the bottom of a supporting structure, and a pulley which can slide in a spiral sliding groove at the bottom of the supporting structure to realize telescopic movement.

[0007] Preferably, the lifting structure includes a spiral column, which rotates and wraps around one end of a lifting rope, and the other end of the lifting rope is threadedly connected to a connecting rope hook. The spiral column winds the lifting rope to drive the connecting rope hook to move vertically up and down.

[0008] Preferably, the support structure includes a first support column, which slides axially relative to the second support column to change the height of the support beam from the ground, and pulls the sliding push rod, which slides into the positioning groove on the outer wall of the first support column to fix the displacement height of the first support column.

[0009] Preferably, the top end of the first support column is rotatably connected to one end of the support beam, and the rotation of the first support column can change the angle between the support beam and the first support column.

[0010] Preferably, a support frame is provided at the bottom of the first support column, and the bottom of the first support column is hinged to one end of the support frame. The first support column and the support frame are hinged at both ends of the pneumatic spring respectively. The pneumatic spring changes the angle between itself and the connecting seat to adjust its own extension length, thereby changing the pressure of the internal chamber to form pressure to support the support frame, and the support frame is in contact with the ground.

[0011] Preferably, the lifting structure includes a rotating plate, the central axis of the rotating plate is threadedly connected to the axial through hole of the support beam, and the rotating plate rotates, driving the slide block to slide in the slide grooves at the four cross-shaped ends of the support beam through the waist grooves at the four cross-shaped ends of the rotating plate, and the lifting cable slides inside the slide block. The movement of the slide block will change the vertical hanging position of the lifting cable after passing through the slide block.

[0012] Preferably, the end of the lifting rope hanging vertically relative to the ground is threadedly connected with a connecting rope hook.

[0013] Preferably, the lifting structure includes a cover plate, a spring for applying elastic force is arranged on the back of the cover plate, and the front of the cover plate is covered with a sponge pad, which is in contact with the surface of the lifting material.

[0014] The technical solution of the present application has at least the following advantages and beneficial effects:

[0015] The detachable connecting base plate and retractable pulley allow the device to be quickly converted between indoor and outdoor working environments; the adjustable height and angle of the support column allow the device to be fixed and retracted on rugged ground environments and to switch to different lifting heights; the vertical position of the lifting rope is adjustable, allowing the device to lift heavy objects of different sizes, with a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the supporting structure.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the support structure.

[0019] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of A.

[0020] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of B.

[0021] Figure 6 It is a structural diagram of the lifting structure.

[0022] Figure 7 It is a structural diagram of the lifting structure.

[0023] Figure 8 for Figure 6 Schematic diagram of the enlarged structure of C in the figure.

[0024] Fig. 9 for Figure 6 Schematic diagram of the enlarged structure of D in the figure.

[0025] In the figure: 1-support beam; 2-connecting bottom plate; 3-support structure; 4-lifting structure; 5-connecting hook; 301-first fixed axis; 302-first support column; 303-second support column; 304-sliding push rod; 305-pull rod; 306-connecting seat; 307-first fixed block; 308-pneumatic spring; 309-second fixed block; 310-support frame; 311-second fixed axis; 312-sliding groove column ; 313-sliding circular plate; 314-locking bolt; 315-pulley; 401-support plate; 402-motor; 403-first gear; 404-second gear; 405-spiral column; 406-lifting rope; 407-rotating plate; 408-push plate; 409-sliding column; 410-connecting cylinder; 411-slide block; 412-third fixed block; 413-cover plate; 414-sponge pad; 415-spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. If the terms "center", "upper", "lower", "inner", "outer", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the figure, or the orientation or position relationship in which the product of the application is usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. It should also be noted that unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, they should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Example

[0029] Please refer to Figure 1-Figure 3 The utility model provides a mobile crane, including a support beam 1, a connecting bottom plate 2, a support structure 3 and a first fixed axis 301 in the support structure 3.

[0030] Furthermore, the support beam 1 is a support frame of the crane, which is a cross-plate structure. By rotating the first fixed shaft 301 arranged at the four ends of the cross of the support beam 1, the support structure 3 and the support beam 1 are rotatably connected, so that the support structure 3 can be rotated outwards equivalent to the support beam 1. The support structure 3 is load-bearing, and the bottom of the support structure 3 is installed with a connecting bottom plate 2 by screw connection, and the connecting bottom plate 2 can be quickly disassembled at the bottom of the support structure 3.

[0031] Specifically, when the crane is moved to an outdoor environment for lifting operations, the supporting ground in the external environment is often uneven, causing the four supporting corners of the crane to contact the ground for support at the same time, causing the center of gravity of the crane to shift and easily tip over. Therefore, at this time, the angle between the single supporting structure 3 and the supporting beam 1 can be adjusted, and the stretching length of the supporting structure 3 at that location can be adjusted accordingly to adapt to the ground at different heights. After the adjustment is completed, the supporting structure 3 and the supporting beam 1 should return to an angle of ninety degrees to ensure the horizontality of the supporting beam 1 and to ensure that the center of gravity of the crane is not shifted.

[0032] Specifically, when the crane is moved to an outdoor environment for lifting operations, the connecting base plate 2 connected to the bottom of the supporting structure 3 will contact the ground to hinder movement, and block the supporting components at the bottom of the supporting structure 3 from contacting the ground. Therefore, the connecting base plate 2 is quickly disassembled to facilitate the movement and support of the crane on the external ground; when the crane is performing lifting operations in an indoor factory environment, the installed connecting base plate 2 can be directly connected and fixed to the mobile platform in the industrial plant, so as to facilitate parallel transportation of goods directly in the plant after the crane lifts. The mobile platform is specifically a transverse plate-shaped conveying table driven by a support beam connecting seat 306000 in the prior art.

[0033] In some embodiments, the support structure 3 includes a first support column 302 , a second support column 303 , a sliding push rod 304 , and a pull rod 305 .

[0034] Furthermore, the first support column 302 has a hollow chamber inside, and the column wall of the first support column 302 is provided with a vertical slide that passes through the column wall; the outer wall is also provided with a plurality of waist-shaped grooves that are arranged in parallel up and down and vertically connected to the vertical grooves. The second support column 303 is arranged in the internal chamber of the first support column 302, and the two can slide vertically relative to each other. Two horizontal slide grooves are provided on the side of the second support column 303 near the top. When the first support column 302 moves, when it moves to the locking position, the two horizontal slide grooves of the second support column 303 will overlap with the two adjacent waist-shaped grooves of the first support column 302.

[0035] One end of the two sliding push rods 304 arranged up and down are connected as a whole through a connecting rod, and the other ends of the two sliding push rods pass through the vertical slide of the first support column 302 and are located in the horizontal slide of the second support column. The distance between the two slide push rods 304 is equal to the distance between the two horizontal slide grooves on the second support column, so that the sliding push rods 304 can slide from the vertical slide into the horizontal slide groove.

[0036] By pulling the connecting rod of the sliding push rod 304, the sliding push rod 304 can be moved in the horizontal sliding groove of the second support column 303. A pull rod 305 is set on the bottom back of the first support column 302 to facilitate people to lift the first support column 302 and make it slide relative to the second support column 303.

[0037] Specifically, when adjusting the height of the crane, the sliding push rod 304 is pulled out from the slot of the first support column 302 and the horizontal slot of the second support column 303 to the vertical slideway to unlock, and the first support column 302 and the second support column 303 can slide relative to each other. Then the pull rod 305 is pulled up, and the first support column 302 slides relative to the second support column 303, and the pulled out sliding push rod 304 slides in the external connection slot of the slot of the first support column 302. When the horizontal slot of the second support column 303 and the waist-shaped slot of the first support column 302 are relatively overlapped (i.e., locked), the sliding push rod 304 is pulled back into the aligned slot to fix the height of the first support column 302, and the height adjustment of the crane is completed.

[0038] Please refer to Figure 4-Figure 5 In some embodiments, the support structure 3 includes a connecting seat 306, a first fixed block 307, a pneumatic spring 308, a second fixed block 309, a support frame 310, a second fixed shaft 311, a slide column 312, a sliding circular plate 313, a locking bolt 314, and a pulley 315.

[0039] Further, the bottom of the second support column 303 is fixedly connected with a connection seat 306, and grooves are arranged on the four sides of the connection seat 306. The top of the groove is rotatably connected to one end of a pneumatic spring 308 through a fixed first fixing block 307, and the other end of the pneumatic spring 308 is rotatably connected to a second fixing block 309. The second fixing block 309 is located in the middle of the support frame 310. The pneumatic spring 308 is connected to the middle of the support frame 310 through the second fixing block 309, and one end of the support frame 310 is rotatably mounted on the bottom of the groove of the connection seat 306. The other end of the support frame 310 is a movable end, and when the support frame 310 is unfolded to a certain angle, the other end of the support frame 310 is used to abut against the ground or the connection base plate 2.

[0040] Specifically, when the crane is not performing lifting operations, the piston column of the pneumatic spring 308 contracts and the support frame 310 rotates and retracts into the groove of the connecting seat 306; when lifting operations are performed in an external environment, due to the loose soil structure, a relatively slender support frame 310 needs to be removed and inserted into the ground to enhance the stability of the device. At this time, the other end of the support frame 310 is manually moved, and the piston column of the pneumatic spring 308 begins to extend due to the rotation of the support frame 310. At this time, in the internal chamber of the pneumatic spring 308, the air pressure on the left side is less than the air pressure on the right side, and the extension of the piston rod of the pneumatic spring 308 will encounter resistance. When the piston rod of the pneumatic spring 308 is extended too long, the gas inside the pneumatic spring 308 is transferred due to the pumping suction when the piston rod moves, so that the air pressure on the left side is greater than the air pressure on the right side. The extension of the piston rod of the pneumatic spring 308 will be subject to its own thrust, which automatically pushes the support frame 310 to rotate to a specified angle, so that the right end of the support frame 310 contacts the ground. The working principle of the pneumatic spring 308 is known in the prior art, so the internal structural principle of the pneumatic spring 308 will not be described in detail.

[0041] Furthermore, a slide column 312 is fixedly installed at the bottom of the connecting seat 306. The slide column 312 is a hollow cylinder with a spiral slide groove on the outer wall. The main body of the sliding circular plate 313 is a circular plate, which slides inside the slide column 312. A cylinder extends from the side of the sliding circular plate 313. The cylinder of the sliding circular plate 313 slides in the spiral groove on the outer wall of the slide column 312. The cylinder spirally slides in the slide groove of the slide column 312, driving the main circular plate of the sliding circular plate 313 to move up and down inside the slide column 312. A pulley 315 is rotatably installed at the bottom of the sliding circular plate 313, and the pulley 315 can drive the crane to move. The extended cylinder of the sliding circular plate 313 is threadedly connected with a locking bolt 314. Tightening the locking bolt 314 can fix the sliding circular plate 313 at the current spiral groove position of the slide column 312.

[0042] Specifically, when the crane needs to be moved, the locking bolt 314 is loosened, the sliding circular plate 313 is moved to slide in the spiral groove, and the pulley 315 is moved out from the inside of the slide column 312. When the pulley 315 extends out of the slide column 312 and contacts the ground, the locking bolt 314 is tightened to fix the height of the pulley 315, and then the crane can be pushed to move.

[0043] Please refer to Figure 7-Figure 9In some embodiments, the mobile crane further comprises a lifting structure 4, which comprises a support plate 401, a motor 402, a first gear 403, a second gear 404, a spiral column 405, and a lifting rope 406. Further, the support plate 401 is fixedly mounted on the support beam 1, and the two are coaxial. A motor 402 is fixedly arranged on the top of the support plate 401. The motor 402 is a driving component. The spiral column 405 rotatingly arranged in the middle of the support plate 401 is driven to rotate synchronously through the engagement of the first gear 403 fixedly connected to the driving shaft of the motor 402 and the second gear 404 fixedly connected to the circular shaft of the spiral column 405. The spiral column 405 is wound around one end of the lifting rope 406 through the spiral protrusion on the shaft, so as to realize the winding of the lifting rope 406.

[0044] Specifically, when lifting materials, the lifting rope 406 serves as a rope segment for connecting the materials to lift them. The motor 402 drives the spiral column 405 to rotate, so that the lifting rope 406 can be wound around the spiral column 405, and the external lifting rope 406 can be retracted to lift the materials connected by the lifting rope 406.

[0045] Furthermore, the bottom end of the lifting rope 406 is threadedly connected with a connecting rope hook 5, and the connecting rope hook 5 can be quickly disassembled through the thread. When the lifting object can be hooked by the hook lock, the lifting can be directly hooked by the connecting rope hook 5. If there is no obvious fixed part on the surface of the lifting object, the connecting rope hook 5 can be removed and the weight can be directly tied by the rope segment of the lifting rope 406 for lifting.

[0046] In some embodiments, the lifting structure 4 includes a driving structure, a connecting piece, and a slide block 411. The driving structure drives the slide block to slide in the support beam 1 through the connecting piece.

[0047] Furthermore, the driving structure includes a rotating plate 407 and a push plate 408. There is a circular hole at the axis of the support beam 1, and a thread is arranged inside. The axis of the rotating plate 407 is coaxial with the axis of the support beam 1, and the axis of the rotating plate 407 is threadedly connected to the internal circular hole of the support beam 1. The rotating plate 407 is cross-shaped, and the rotating plate 407 is fixedly installed at the bottom of the push plate 408. When the push plate 408 is pulled, the rotating plate 407 is rotated by means of threads, and the four ends of the rotating plate 407 are respectively provided with female slide grooves distributed along the length direction, and the support beam 1 is provided with a male slide groove along the length direction of the support beam for matching with the female slide groove, and the support arms of the support beam 1 are all provided with male slide grooves.

[0048] A connecting member is provided between the rotating plate 407 and the slide block 411. The connecting member includes a slide post 409 and a connecting cylinder 410. The connecting member is located in the female slide and the male slide and can slide therein. When the rotating plate 407 rotates, the position of the female slide of the rotating plate 407 changes. Due to the force applied by the female slide to the slide post 409 during the relative movement, the slide post 409 is driven to slide in the female slide. The top of the slide post 409 is fixedly connected to one end of the connecting cylinder 410, and the other end of the connecting cylinder 410 is located in the male slide of the support beam 1, so that the connecting cylinder 410 slides in the male slide. When the slide post 409 moves through the rotating plate 407, the slide post 409 will drive the connecting cylinder 410 in the male slide. The sliding groove block 411 is hollow at the middle end, and rollers are arranged inside the hollow part. After the lifting rope 406 passes around the rollers at the hollow part of the middle end of the sliding groove block 411, the lifting gravity is shared by the sliding groove block 411. The rollers inside the sliding groove block 411 reduce the friction force generated when the sliding groove block 411 contacts with the lifting rope 406, thereby reducing the loss of the lifting rope 406.

[0049] Specifically, when lifting heavy objects with different cross-sectional areas, the push plate 408 is rotated to drive the rotating plate 407 to rotate, and the sliding column 409 is driven to slide by the rotating plate 407. The sliding of the sliding column 409 changes the position of the slide block 411 on the slide of the support beam 1, so that the hanging position of the lifting cable 406 after passing through the slide block 411 is changed, and the position of the connection between the connecting hook 5 at the bottom end of the lifting cable 406 and the lifting object is changed, so that heavy objects of different sizes or different cross-sectional areas can be lifted.

[0050] In some embodiments, an anti-sway structure is also included, and the anti-sway structure includes a third fixing block 412 , a cover plate 413 , a sponge pad 414 , and a spring 415 .

[0051] Furthermore, the bottom end of the cover plate 413 is rotatably connected to the third fixing block 412 fixed to the side of the first support column 302, the front of the cover plate 413 is covered with a sponge pad 414, the sponge pad 414 is an elastic cotton-like structure with a shock-absorbing function, the back of the cover plate 413 is connected to the side of the first support column 302 through a spring 415, and a retractable elastic force is applied to the cover plate 413 through the spring 415. The entire anti-sway structure is provided with multiple anti-sway treatments at multiple angles for lifting multiple heavy objects on the inner side of each support structure 3.

[0052] Specifically, when a heavier and larger object is lifted, a slight shaking will occur. The shaking of the object will increase the bearing capacity of the device and increase the risk of damage to the crane structure. Therefore, when lifting, the sponge pad 414 contacts the surface of the object, and the elastic force of the spring 415 at the rear end of the cover plate 413 offsets part of the shaking, reducing the shaking amplitude of the object. The elastic surface of the sponge pad 414 avoids wear on the object.

[0053] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present invention, and the scope of the present invention is defined by the attached claims.

Claims

1. A mobile crane, characterized in that: It comprises a support structure (3), a connection base plate (2) connected to the support structure in a quick-detachable manner, a pulley (315) telescopically arranged at the bottom of the support structure (3), a support beam (1) arranged at the top of the support structure (3), and a lifting structure (4) for connecting a heavy object is provided on the support beam (1); The support structure (3) comprises a first support column (302), the first support column (302) slides axially relative to the second support column (303), the first support column (302) telescopes up and down to change the height of the support beam (1) from the ground, the first support column (302) is provided with a vertical slideway corresponding to the position, the first support column (302) is provided with a plurality of waist grooves vertically connected to and parallel to the vertical slideway, the second support column (303) is provided with a waist groove vertical to the vertical slideway, and the sliding push rod (304) is located in the vertical slideway of the first support column (302); when the waist grooves of the first support column (302) and the second support column (303) overlap, the sliding push rod (304) slides into the waist groove to complete the height fixation of the first support column (302); The top end of the first support column (302) is rotatably connected to one end of the support beam (1) via a fixedly installed first fixed shaft (301), and the first support column (302) rotates around one end of the support beam (1) to expand outward; the angle between the first support column (302) and the support beam (1) changes, and the first support column (302) slides axially along the second support column (303) at different ground heights.

2. A mobile crane according to claim 1, characterized in that: The bottom of the first support column (302) is hinged to one end of the support frame (310), and the two ends of the pneumatic spring (415) are respectively hinged to the first support column (302) and the support frame (310); the support frame (310) is in contact with the ground when unfolded.

3. A mobile crane according to claim 1, characterized in that: The lifting structure (4) comprises a spiral column (405), wherein the spiral column (405) rotates and wraps around one end of a lifting rope (406); the spiral column (405) winds around a plurality of separated rope segments of the lifting rope (406) and moves synchronously.

4. A mobile crane according to claim 1, characterized in that: The supporting arms of the support beam (1) are all provided with a male slide groove, and a slide groove block (411) is provided in the male slide groove and is movable relative to the slide groove. A roller for the lifting rope (406) to pass around is rotatably mounted on the slide groove block (411); when the lifting rope (406) passes around the roller, the driving structure drives the slide groove block (411) to move.

5. A mobile crane according to claim 3, characterized in that: The end of the lifting rope (406) hanging vertically relative to the ground is threadedly connected with a connecting rope hook (5).

6. A mobile crane according to claim 3, characterized in that: It also includes an anti-sway structure, which includes a cover plate (413), the back of which is fixedly connected to one end of a spring (415) for applying elastic force, the other end of which is fixedly connected to the outer wall of the first support column (302), and the front of the cover plate (413) is covered with a sponge pad (414), which is in contact with the surface of the lifting material.

7. A mobile crane according to claim 4, characterized in that: The driving structure comprises a cross-shaped rotating plate (407), the axis of which is threadedly connected to the internal circular hole of the support beam (1), the four ends of which are respectively provided with female slide grooves distributed along the length direction, the support beam (1) is provided with a male slide groove for matching with the female slide groove along the length direction of the support beam (1), a connecting piece is provided between the rotating plate (407) and the slide groove block (411), the connecting piece is fixedly connected to the slide groove block (411), and the connecting piece is located in the female slide groove and the male slide groove and slides; when the rotating plate (407) is rotated by means of the thread, the position of the female slide groove changes, and the female slide groove drives the connecting piece to slide in the male slide groove in relative motion, and the sliding of the connecting piece drives the slide groove block (411) to move.

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