Cantilever crane

Abstract

The utility model discloses a cantilever crane and relates to the technical field of cranes. The cantilever crane comprises a base, a hydraulic rod is fixedly installed on the upper surface of the base, the top of the hydraulic rod is sleeved with a sleeve, a cross beam is fixedly installed on the top of the sleeve, a positioning ring and a limiting rod are arranged on the two sides of the bottom of the cross beam respectively, a limiting block is slidably connected to the limiting rod, and a round hole is formed in the limiting block; according to the lifting device, the motor is controlled to work, then the motor drives the threaded rod to rotate, the threaded rod drives the movable block and the sliding plate to move in the opposite or opposite directions, and therefore the gravity center of the lifting device can be conveniently adjusted in the follow-up lifting process; and the weights of the two ends of the cross beam are balanced, in the subsequent use process, parts on the crane are prevented from being damaged, the service life of the crane is prolonged, subsequent use is facilitated, and the use convenience of the crane is improved.

Description

Technical Field

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

[0002] The picking device of a cantilever crane is suspended at the end of the arm or on a lifting trolley that can run along the jib. A jib crane in which the jib can rotate but cannot pitch is called a cantilever crane. An existing patent, patent announcement number CN218595977U, discloses a cantilever of a cantilever crane, including a support column and a transverse cantilever, and the transverse cantilever is fixedly mounted on the top of the support column. The cantilever of the cantilever crane drives the walking gear on the rack through the motor at the rear end of the lower connecting slider, so that the lower connecting slider moves outside the transverse cantilever. During the movement of the lower connecting slider outside the transverse cantilever, the inner rollers at the top and bottom ends of the lower connecting slider roll in the rolling groove, thereby converting the sliding friction into rolling friction, greatly reducing the friction resistance of the lower connecting slider when it moves outside the transverse cantilever. In this way, the friction resistance of the lower connecting slider when it moves on the transverse cantilever is small, and no sliding wear will occur, thereby ensuring the service life of the cantilever. The problem that the sliding friction resistance of the lower connecting block on the cantilever is large, especially when suspending heavier objects, is not only large in sliding friction resistance, but also will cause sliding wear, affecting the service life of the cantilever.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: in actual application, when a crane lifts an object, its force point and the center of gravity of the machine change during movement. If the force point and the center of gravity cannot be adjusted, the subsequent use of the machine will cause damage to the machine, reducing the service life of the crane. Therefore, we proposed a cantilever crane to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a cantilever crane, which solves the problem that it is inconvenient to adjust the center of gravity of the crane during use, thereby reducing the service life of the crane.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a cantilever crane, including a base, a hydraulic rod is fixedly installed on the upper surface of the base, a sleeve is provided on the top of the hydraulic rod, a crossbeam is fixedly installed on the top of the sleeve, and a positioning ring and a limit rod are respectively provided on both sides of the bottom of the crossbeam.

[0006] The limiting rod is slidably connected to a limiting block, a circular hole is provided inside the limiting block, a slot connected to the circular hole is provided on one side of the limiting block, a circular disc is provided inside the circular hole, a steel cable is fixedly installed at the bottom of the circular disc, and a hook is fixedly installed at the bottom of the steel cable.

[0007] A counterweight block is provided inside the positioning ring, a cavity is opened inside the crossbeam, a moving block and a slide plate are slidably connected inside the cavity respectively, the bottom of the moving block is fixedly connected to the top of the positioning ring, the bottom of the slide plate is fixedly connected to the top of the limit block through a sliding rod, a motor is fixedly installed on one side of the inner wall of the cavity, a threaded rod is fixedly installed on the output shaft of the motor, one end of the threaded rod passes through the moving block and the slide plate in sequence and extends to the outside of the slide plate.

[0008] Preferably, mounting plates are fixedly mounted at the four corners of the bottom of the base, mounting holes are provided on the mounting plates, the mounting holes are oblong holes, and anti-slip grooves are provided on the lower surface of the mounting plates.

[0009] Preferably, inclined rods are fixedly installed on both sides of the sleeve, the top of the inclined rod is fixedly connected to the bottom of the cross beam, and the sleeve is rotatably connected to the top of the hydraulic rod through a bearing.

[0010] Preferably, limit plates are fixedly installed on both sides of the counterweight block, limit grooves for the limit plates to slide are provided on both sides of the inner wall of the positioning ring, a plate groove for the limit plates to pass through is provided on one side of the positioning ring, and the plate groove is connected to the limit groove.

[0011] Preferably, screw rods are inserted on both sides of the bottom of the limiting block, a rotating block is fixedly installed on the bottom of the screw rod, and anti-slip grooves are provided on the surface of the rotating block.

[0012] Preferably, one end of the threaded rod is sleeved with a sleeve rotatably connected to the threaded rod, and one end of the sleeve is fixedly connected to one side of the inner wall of the cavity.

[0013] Preferably, the threaded rod is provided with two opposite threads, and the two opposite threads are respectively threadedly connected to the moving block and the slide plate. Beneficial Effects

[0014] The utility model provides a cantilever crane. Compared with the prior art, it has the following beneficial effects:

[0015] The cantilever crane works by controlling the motor, and then the motor drives the threaded rod to rotate, and the threaded rod drives the moving block and the slide plate to move in relative or opposite directions, so as to facilitate the subsequent adjustment of its center of gravity during the lifting process, so that the weight at both ends of the beam is balanced, and in the subsequent use process, damage to the components of the crane is avoided, thereby increasing the service life of the crane, facilitating subsequent use, and improving the ease of use of the crane.

[0016] At the same time, during use, the screw rod is loosened, and then the disc moves upward, and then pulled out from the inside of the plate slot, which facilitates the replacement of the steel cable. At the same time, the counterweight block is lifted so that the limit plate on the counterweight block coincides with the plate slot, thereby facilitating the removal of the counterweight block, and vice versa, facilitating the installation of the counterweight block. This also improves the disassembly and assembly operation of the crane for components, facilitates subsequent disassembly and assembly operations as needed, and improves the ease of use of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the limit block of the utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the crossbeam of the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the positioning ring of the utility model;

[0021] Figure 5 For this utility model Figure 1 A schematic diagram of the enlarged structure in the middle.

[0022] In the figure: 1. base; 2. hydraulic rod; 3. sleeve; 4. crossbeam; 5. positioning ring; 6. limit rod; 7. limit block; 8. disc; 9. steel cable; 10. hook; 11. counterweight; 12. slide plate; 13. moving block; 14. slide rod; 15. motor; 16. threaded rod; 17. inclined rod; 18. limit plate; 19. screw rod; 20. rotating block; 21. mounting plate. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-5 The utility model provides a technical solution: a cantilever crane includes a base 1, a hydraulic rod 2 is fixedly installed on the upper surface of the base 1, a sleeve 3 is sleeved on the top of the hydraulic rod 2, a crossbeam 4 is fixedly installed on the top of the sleeve 3, and a positioning ring 5 and a limit rod 6 are respectively arranged on both sides of the bottom of the crossbeam 4.

[0025] A limiting block 7 is slidably connected to the limiting rod 6, a circular hole is provided inside the limiting block 7, a slot connected to the circular hole is provided on one side of the limiting block 7, a circular disc 8 is provided inside the circular hole, a steel cable 9 is fixedly installed at the bottom of the circular disc 8, and a hook 10 is fixedly installed at the bottom of the steel cable 9.

[0026] A counterweight block 11 is provided inside the positioning ring 5, and a cavity is opened inside the cross beam 4. A moving block 13 and a slide plate 12 are slidably connected inside the cavity. The bottom of the moving block 13 is fixedly connected to the top of the positioning ring 5, and the bottom of the slide plate 12 is fixedly connected to the top of the limit block 7 through a slide rod 14. A motor 15 is fixedly installed on one side of the inner wall of the cavity, and a threaded rod 16 is fixedly installed on the output shaft of the motor 15. One end of the threaded rod 16 passes through the moving block 13 and the slide plate 12 in sequence and extends to the outside of the slide plate 12.

[0027] The motor 15 is controlled to work, and then the motor 15 drives the threaded rod 16 to rotate, and the threaded rod 16 drives the moving block 13 and the slide plate 12 to move in relative or opposite directions, so as to facilitate the subsequent adjustment of its center of gravity during the lifting process, so that the weight at both ends of the beam 4 is balanced. In the subsequent use process, damage to the components on the crane is avoided, the service life of the crane is increased, the subsequent use is convenient, and the convenience of use of the crane is improved.

[0028] Preferably, mounting plates 21 are fixedly mounted at the four corners of the bottom of the base 1 , mounting holes are provided on the mounting plates 21 , and the mounting holes are oblong holes. The lower surface of the mounting plates 21 is provided with anti-slip grooves.

[0029] The provided mounting plate 21 facilitates the positioning and mounting of the crane during use, thereby facilitating subsequent use and improving the installation stability of the crane.

[0030] Preferably, inclined rods 17 are fixedly installed on both sides of the sleeve 3, the top of the inclined rod 17 is fixedly connected to the bottom of the cross beam 4, and the sleeve 3 is rotatably connected to the top of the hydraulic rod 2 through a bearing.

[0031] The arrangement of the oblique rod 17 facilitates the support of the crossbeam 4 .

[0032] Preferably, limit plates 18 are fixedly installed on both sides of the counterweight block 11, limit grooves for the limit plates 18 to slide are provided on both sides of the inner wall of the positioning ring 5, and a plate groove for the limit plates 18 to pass through is provided on one side of the positioning ring 5, and the plate groove is connected to the limit groove.

[0033] The setting of the limiting plate 18 can facilitate the limiting of the counterweight 11 during use, and the setting of the limiting groove and the plate groove can facilitate the disassembly and assembly thereof.

[0034] Preferably, screw rods 19 are inserted on both sides of the bottom of the limiting block 7, and a rotating block 20 is fixedly installed on the bottom of the screw rod 19, and the surface of the rotating block 20 is provided with anti-slip grooves.

[0035] The screw rod 19 is provided to facilitate the limiting of the disc 8 during use, thereby preventing the disc 8 from falling off during use.

[0036] Loosen the screw rod 19, then move the disc 8 upward, and then pull it out from the inside of the plate slot, which facilitates the replacement operation of the steel cable 9. At the same time, lift the counterweight block 11 so that the limit plate 18 on the counterweight block 11 coincides with the plate slot, thereby facilitating the removal of the counterweight block 11, and vice versa, facilitating the installation of the counterweight block 11. This also improves the disassembly and assembly operation of the crane for components, facilitates the subsequent disassembly and assembly operation according to needs, and improves the convenience of using the crane.

[0037] Preferably, one end of the threaded rod 16 is sleeved with a sleeve rotatably connected to the threaded rod 16 , and one end of the sleeve is fixedly connected to one side of the inner wall of the cavity.

[0038] The provided sleeve can achieve the effect of conveniently limiting one end of the threaded rod 16 during use, which is convenient for subsequent use.

[0039] Preferably, the threaded rod 16 is provided with two opposite threads, and the two opposite threads are threadedly connected to the moving block 13 and the slide plate 12 respectively.

[0040] The two opposite threads can make the moving block 13 and the sliding plate 12 move relative to or in opposite directions during the rotation of the threaded rod 16, so as to facilitate the subsequent position adjustment.

[0041] During operation, the motor 15 is controlled to work, and then the motor 15 drives the threaded rod 16 to rotate, and the threaded rod 16 drives the moving block 13 and the slide plate 12 to move in relative or opposite directions, so as to facilitate the subsequent adjustment of its center of gravity during the lifting process, so that the weight at both ends of the beam 4 is balanced, and in the subsequent use process, damage to the components on the crane is avoided, the service life of the crane is improved, the subsequent use is convenient, and the use convenience of the crane is improved. During use, the screw rod 19 is loosened, and then the disc 8 moves upward, and then it is pulled out from the inside of the plate groove, and then it is convenient to replace the steel cable 9. At the same time, the counterweight block 11 is lifted so that the limiting plate 18 on the counterweight block 11 coincides with the plate groove, thereby facilitating the removal of the counterweight block 11, and vice versa, it is convenient to install the counterweight block 11, thereby improving the disassembly and assembly operation of the crane, facilitating the subsequent disassembly and assembly operation according to needs, and improving the use convenience of the crane.

[0042] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A cantilever crane, comprising a base (1), characterized in that: A hydraulic rod (2) is fixedly mounted on the upper surface of the base (1); a sleeve (3) is sleeved on the top of the hydraulic rod (2); a crossbeam (4) is fixedly mounted on the top of the sleeve (3); and a positioning ring (5) and a limit rod (6) are respectively arranged on both sides of the bottom of the crossbeam (4); The limit rod (6) is slidably connected to a limit block (7), a circular hole is provided inside the limit block (7), a slot connected to the circular hole is provided on one side of the limit block (7), a circular disc (8) is provided inside the circular hole, a steel cable (9) is fixedly installed at the bottom of the circular disc (8), and a hook (10) is fixedly installed at the bottom of the steel cable (9); A counterweight block (11) is arranged inside the positioning ring (5), a cavity is provided inside the crossbeam (4), a moving block (13) and a slide plate (12) are slidably connected inside the cavity, the bottom of the moving block (13) is fixedly connected to the top of the positioning ring (5), the bottom of the slide plate (12) is fixedly connected to the top of the limit block (7) via a slide rod (14), a motor (15) is fixedly mounted on one side of the inner wall of the cavity, a threaded rod (16) is fixedly mounted on the output shaft of the motor (15), one end of the threaded rod (16) passes through the moving block (13) and the slide plate (12) in sequence and extends to the outside of the slide plate (12).

2. A cantilever crane according to claim 1, characterized in that: The four corners of the bottom of the base (1) are fixedly mounted with mounting plates (21), the mounting plates (21) are provided with mounting holes, the mounting holes are oblong holes, and the lower surface of the mounting plates (21) is provided with anti-slip grooves.

3. A cantilever crane according to claim 1, characterized in that: Inclined rods (17) are fixedly mounted on both sides of the sleeve (3); the top of the inclined rod (17) is fixedly connected to the bottom of the crossbeam (4); and the sleeve (3) is rotatably connected to the top of the hydraulic rod (2) via a bearing.

4. A cantilever crane according to claim 1, characterized in that: Limiting plates (18) are fixedly mounted on both sides of the counterweight block (11), limiting grooves for the limiting plates (18) to slide are provided on both sides of the inner wall of the positioning ring (5), and a plate groove for the limiting plates (18) to pass through is provided on one side of the positioning ring (5), and the plate groove is communicated with the limiting groove.

5. The cantilever crane according to claim 1, characterized in that: Screw rods (19) are inserted into both sides of the bottom of the limit block (7), a rotating block (20) is fixedly mounted on the bottom of the screw rod (19), and anti-slip grooves are provided on the surface of the rotating block (20).

6. A cantilever crane according to claim 1, characterized in that: One end of the threaded rod (16) is sleeved with a sleeve rotatably connected to the threaded rod (16), and one end of the sleeve is fixedly connected to one side of the inner wall of the cavity.

7. A cantilever crane according to claim 1, characterized in that: The threaded rod (16) is provided with two sections of opposite threads, and the two sections of opposite threads are respectively threadedly connected to the moving block (13) and the slide plate (12).

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