Manual rotating cantilever crane capable of fixing angle

Abstract

The utility model relates to the technical field of hoisting equipment, in particular to a manual rotating cantilever crane capable of fixing an angle, which comprises a lower upright post, a rotating upright post is sleeved at the upper end of the lower upright post, and a fixing device is arranged between the rotating upright post and the lower upright post. When the lifting appliance is used, the bolt is taken down from the hoop groove, the movable arm rod of the manual rotating device is displayed, and the second rotating bearing and the first rotating bearing are matched with the pressure-bearing bearing to rotate between the lower stand column and the rotating stand column, so that the cantilever upper lifting appliance is adjusted to a preset angle; and then the hoop angle of the anti-rotation device on the lower stand column is adjusted, so that the hoop groove corresponds to the fixing pin hole, the plug pin is inserted and fixed, and the lifting equipment is maintained under the condition of different angles.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a cantilever crane capable of manually rotating at a fixed angle. Background Art

[0002] The column-type cantilever crane is a light and small lifting equipment with the advantages of novel, reasonable, simple structure, convenient operation, flexible rotation, large working space, etc. It is an energy-saving and efficient material lifting equipment. It is widely used in factories, mines, workshops, production lines, assembly lines, upper and lower workpieces of machine tools, and heavy lifting in warehouses, docks and other occasions. It is usually composed of a column, a slewing cantilever, a chain electric hoist, an electronic control system, etc. The slewing part is divided into manual and electric slewing (the cycloid pinwheel reducer is installed on the upper or lower support plate to drive the rotating tube arm to rotate), and the chain hoist is installed on the cantilever track for lifting heavy objects.

[0003] The cantilever cranes actually used in special maintenance stations at docks are required to have a fixed turning radius and be able to lift equipment at different angles for equipment maintenance. The boom cannot rotate during the hoisting process. Therefore, those skilled in the art provide a cantilever crane with a fixed angle and manual rotation to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a cantilever crane with a fixed angle of manual rotation, comprising a lower column, a rotating column is sleeved on the upper end of the lower column, a fixing device is arranged between the rotating column and the lower column, and the fixing device comprises a second rotating bearing, a fixing sleeve, a first rotating bearing, a pressure bearing, a lubricating oil hole, a dust cover, a fixing pin hole, an anti-rotation device, a hoop groove and a latch, the second rotating bearing is sleeved on the upper end of the lower column, the second rotating bearing is fixedly installed in the rotating column, the first rotating bearing is fixedly installed on the inner wall of the lower part of the rotating column, a fixing sleeve is fixedly installed on the outer side of the lower part of the rotating column, and the pressure bearing is fixedly installed on the inner wall of the fixing sleeve, a plurality of fixing pin holes are annularly opened on the fixing sleeve, a latch is arranged in the fixing pin hole, an anti-rotation device is arranged on the lower column, a hoop groove is opened on the anti-rotation device, and the hoop groove corresponds to the latch.

[0005] Preferably, a manual rotating device is symmetrically welded to the side end of the rotating column, and the rotating angle of the rotating column is changed by grasping and rotating the rotating column through the manual rotating device.

[0006] Preferably, a cantilever is fixedly mounted on the upper end of the rotating column, a sling is hoisted and mounted on the lower end of the cantilever, grid wire troughs are provided inside the cantilever and the rotating column, and the grid wire troughs facilitate wire management of the sling.

[0007] Preferably, both the first rotary bearing and the second rotary bearing adopt deep groove ball bearings. The two sides of the deep groove ball bearings are provided with retaining covers, and the deep groove ball bearings are lubrication-free, which is beneficial to reducing contact with air and preventing aging.

[0008] Preferably, the lower part of the fixed socket is fixed by dust cover screws, so as to prevent impurities from entering the connection between the lower column and the rotary column.

[0009] Preferably, the pressure-bearing bearing adopts a tapered roller bearing. While the tapered roller bearing can effectively bear the pressure on the rotary column, it can ensure smooth rotation. A lubricating oil hole is opened at the side end of the fixed socket, and the lubricating oil hole is arranged corresponding to the pressure-bearing bearing.

[0010] The technical effects and advantages of the present utility model:

[0011] 1. When the present utility model is in use, by removing the pin from the hoop groove, the movable arm of the manual rotating device is shown. The cooperation of the second rotary bearing and the first rotary bearing with the pressure-bearing bearing enables the rotation between the lower column and the rotary column, so as to adjust the sling on the cantilever to a preset angle. Then, by adjusting the hoop angle of the anti-rotation device on the lower column, the hoop groove is made to correspond to the fixed pin hole, and the pin is inserted and fixed for the maintenance of the lifting equipment in different angles.

[0012] 2. When the present utility model is in use, the pressure-bearing bearing adopts a tapered roller bearing. While the tapered roller bearing can effectively bear the pressure on the rotary column, it can ensure smooth rotation. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram provided by the present application;

[0014] Figure 2 is the structural schematic diagram of the fixing device provided by the present application;

[0015] Figure 3 is the structural schematic diagram of the rotary column provided by the present application;

[0016] In the figure: 1. Lower column; 2. Rotary column; 3. Cantilever; 4. Manual rotating device; 5. Sling; 6. Fixing device; 7. Grid wire trough;

[0017] 61. Second rotary bearing; 62. Fixed socket; 63. First rotary bearing; 64. Pressure-bearing bearing; 65. Lubricating oil hole; 66. Dust cover; 67. Fixed pin hole; 68. Anti-rotation device; 69. Hoop groove; 610. Pin. Detailed Embodiment

[0018] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present utility model are given for the purpose of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0019] Please refer to Figures 1 to 3 , in this embodiment, a manually rotatable cantilever crane with a fixed angle is provided, including a lower column 1. A rotating column 2 is sleeved on the upper end of the lower column 1. A fixing device 6 is arranged between the rotating column 2 and the lower column 1. Manually rotating devices 4 are symmetrically welded to the side end of the rotating column 2. The rotating column 2 is grabbed and rotated through the manually rotating devices 4 to change the rotation angle of the rotating column 2. A cantilever 3 is fixedly installed at the upper end of the rotating column 2. A lifting appliance 5 is installed by hoisting at the lower end of the cantilever 3. Grid wire grooves 7 are formed inside the cantilever 3 and the rotating column 2. The grid wire grooves 7 facilitate wire routing for the lifting appliance 5.

[0020] The fixing device 6 includes a second rotating bearing 61, a fixing socket 62, a first rotating bearing 63, a pressure-bearing bearing 64, a lubricating oil hole 65, a dust-proof cover 66, a fixing pin hole 67, an anti-rotation device 68, a hoop groove 69 and a pin 610. The second rotating bearing 61 is sleeved on the upper end of the lower column 1, and the second rotating bearing 61 is fixedly installed inside the rotating column 2. The first rotating bearing 63 is fixedly installed on the inner wall of the lower part of the rotating column 2. Both the first rotating bearing 63 and the second rotating bearing 61 adopt deep groove ball bearings. Both sides of the deep groove ball bearings are provided with retaining covers, and the deep groove ball bearings are lubrication-free, which is beneficial to reducing contact with air and preventing aging. A fixing socket 62 is fixedly installed on the outer side of the lower part of the rotating column 2. The lower part of the fixing socket 62 is fixed by screws with the dust-proof cover 66, so as to prevent impurities from entering the connection between the lower column 1 and the rotating column 2. A pressure-bearing bearing 64 is fixedly installed on the inner side wall surface of the fixing socket 62. The pressure-bearing bearing 64 adopts a tapered roller bearing. The tapered roller bearing can effectively bear the pressure of the rotating column 2 while ensuring smooth rotation. A lubricating oil hole 65 is opened at the side end of the fixing socket 62, and the lubricating oil hole 65 is arranged corresponding to the pressure-bearing bearing 64. A plurality of fixing pin holes 67 are annularly opened on the fixing socket 62, and a pin 610 is arranged in the fixing pin holes 67. An anti-rotation device 68 is arranged on the lower column 1, and a hoop groove 69 is opened on the anti-rotation device 68, and the hoop groove 69 corresponds to the pin 610.

[0021] The working principle of the present utility model is:

[0022] When the utility model is in use, the bolt 610 is removed from the hoop groove 69 to display the movable arm of the manual rotating device 4. The second rotating bearing 61 and the first rotating bearing 63 cooperate with the pressure-bearing bearing 64 to rotate between the lower column 1 and the rotating column 2, so as to adjust the sling 5 on the cantilever 3 to a preset angle. Then, by adjusting the hoop angle of the anti-rotation device 68 on the lower column 1, the hoop groove 69 is made to correspond to the fixed pin hole 67, and the bolt 610 is inserted and fixed for the maintenance of the lifting equipment in different angles.

[0023] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A cantilever crane capable of manually rotating at a fixed angle, comprising a lower column (1), characterized in that: The upper end of the lower column (1) is sleeved with a rotating column (2), and a fixing device (6) is arranged between the rotating column (2) and the lower column (1). The fixing device (6) comprises a second rotating bearing (61), a fixing sleeve (62), a first rotating bearing (63), a pressure bearing (64), a lubricating oil hole (65), a dust cover (66), a fixing pin hole (67), an anti-rotation device (68), a hoop groove (69) and a latch (610). The upper end of the lower column (1) is sleeved with a second rotating bearing (61), and the second rotating bearing (61) is fixedly mounted on the rotating column (2). Inside the column (2), a first rotating bearing (63) is fixedly installed on the inner wall of the lower part of the rotating column (2), a fixed sleeve (62) is fixedly installed on the outer side of the lower part of the rotating column (2), a pressure bearing (64) is fixedly installed on the inner wall of the fixed sleeve (62), a plurality of fixing pin holes (67) are annularly opened on the fixing sleeve (62), a plug pin (610) is arranged in the fixing pin hole (67), an anti-rotation device (68) is arranged on the lower column (1), a clamp groove (69) is opened on the anti-rotation device (68), and the clamp groove (69) corresponds to the plug pin (610).

2. A cantilever crane with a fixed angle and manual rotation according to claim 1, characterized in that: A manual rotating device (4) is symmetrically welded to the side end of the rotating column (2).

3. A cantilever crane with a fixed angle and manual rotation according to claim 2, characterized in that: A cantilever (3) is fixedly mounted on the upper end of the rotating column (2), a sling (5) is hoisted and mounted on the lower end of the cantilever (3), and a grid wire trough (7) is provided inside the cantilever (3) and the rotating column (2).

4. A manually rotatable cantilever crane with a fixed angle according to claim 1, characterized in that: The first rotary bearing (63) and the second rotary bearing (61) are both deep groove ball bearings, and both sides of the deep groove ball bearings are covered.

5. The cantilever crane with a fixed angle and manual rotation according to claim 1, characterized in that: The lower part of the fixing sleeve (62) is fixed by a dust cover (66) screw.

6. A manually rotatable cantilever crane with a fixed angle according to claim 5, characterized in that: The pressure bearing (64) is a tapered roller bearing, and a lubricating oil hole (65) is provided at the side end of the fixed sleeve (62), and the lubricating oil hole (65) is arranged corresponding to the pressure bearing (64).

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