Cantilever hoist

Abstract

A cantilever hoist comprises a stand column, a supporting frame, an electric walking mechanism and an electric hoist, the supporting frame comprises a rotating circular shaft, a cross beam and a reinforcing inclined rod, one end of the cross beam and one end of the reinforcing inclined rod are both welded to the peripheral face of the rotating circular shaft, and the reinforcing inclined rod is located above the cross beam; the other end of the reinforcing inclined rod is fixedly connected with a fixed pull rod welded to the top of the other end of the cross beam, and the electric hoist is installed on the cross beam in a sliding mode through an electric walking mechanism. An upper mounting base and a lower mounting base located below the upper mounting base are welded to the stand column, a vertical cavity is formed in the rotating circular shaft in the axial direction, a vertical circular shaft is inserted into the vertical cavity in a penetrating mode, the upper end of the vertical circular shaft is fixed to the upper mounting base, and the lower end of the vertical circular shaft is fixed to the lower mounting base; and a bearing structure for rotationally connecting the rotating circular shaft with the vertical circular shaft is arranged in the vertical cavity. According to the utility model, the stability, the bearing capacity and the use efficiency of the equipment are improved, and the practical value is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever hoisting, and particularly relates to a cantilever hoisting device. Background Art

[0002] The cantilever hoisting belongs to industrial components and is a light-duty crane, which plays a very important role in modern production and construction projects.

[0003] Referring to the column cantilever material hoisting device disclosed in the technical solution of patent number 201821339705.6, which includes a column, two bearing seats, two bearings, a support frame and an electric hoist. The column is fixedly erected on the ground, and the two bearing seats are respectively fixedly installed on the column through two fixed clamps; the support frame includes a cross beam and a rotating shaft vertically fixed to one end of the cross beam. Both ends of the rotating shaft are rotatably installed in the two bearing seats through two bearings. A fixing plate is fixedly connected to the peripheral wall of the rotating shaft, and the top end of the fixing plate is connected to the extended end of the cross beam through a wire rope to form a triangular support structure. The electric hoist is slidably installed on the cross beam; a single-direction thrust ball bearing is installed in a single-direction thrust ball bearing seat, and the single-direction thrust ball bearing seat is installed under the lower bearing seat. The above technical solution improves the rotation stability of the support frame through the bearings and the single-direction thrust ball bearings, and can make the support frame rotate smoothly for material transfer.

[0004] However, in this technical solution, the two bearing seats are respectively fixedly installed on the column through two fixed clamps. When the fixed clamps are fixed on the column, if the fixation is not tight enough, after the support frame operates under long-term load, the bearing seats are likely to displace downward in the vertical direction, and the installation height of the support frame also decreases accordingly, affecting the normal use of the support frame. In addition, when the triangular support structure formed by the wire ropes bears heavy objects, due to the low strength of the wire ropes, it is easy to cause the cross beam to bend and pull the wire ropes, and then the wire ropes break, affecting the stability of the support frame. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a cantilever hoisting device.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A cantilever hoisting device, including a column, a support frame, an electric walking mechanism and an electric hoist, characterized in that:

[0008] The support frame includes a rotating circular shaft, a cross beam and a reinforcing diagonal rod. One end of the cross beam and one end of the reinforcing diagonal rod are both welded on the outer peripheral surface of the rotating circular shaft. The reinforcing diagonal rod is located above the cross beam. The other end of the reinforcing diagonal rod is fixedly connected to a fixed pull rod welded on the top of the other end of the cross beam. The electric hoist is slidably installed on the cross beam through the electric walking mechanism;

[0009] An upper mounting seat and a lower mounting seat located below the upper mounting seat are welded on the column, a vertical cavity is provided along the axial direction of the rotating circular shaft, a vertical circular shaft is inserted in the vertical cavity, the upper end of the vertical circular shaft is fixed on the upper mounting seat, and the lower end is fixed on the lower mounting seat;

[0010] A bearing structure is provided in the vertical cavity to rotatably connect the rotating circular shaft with the vertical circular shaft; a motor device is provided on the top of the column to drive the support frame to rotate with the vertical circular shaft as the rotation center, and the motor device is connected to the rotating circular shaft through a gear transmission mechanism.

[0011] In the utility model, a plurality of reinforcing rods are welded to the bottom surface of the reinforcing diagonal rod, and the plurality of reinforcing rods are horizontally arranged along the length direction of the crossbeam and distributed between the rotating circular shaft and the fixed rod.

[0012] In the utility model, a reinforcement support plate is welded on the outer circumferential surface of the rotating circular shaft, the top of the reinforcement support plate is welded and fixed to the bottom surface of the reinforcement oblique rod, and the bottom is welded and fixed to the top of the crossbeam.

[0013] In the utility model, a motor base is installed on the top of the column, and the motor device includes a drive motor and a reducer. The reducer is installed on the top of the motor base. The drive motor is powered by a motor cable. The drive motor is installed on the reducer. The output shaft of the drive motor is transmission-connected to the rotation input end of the reducer, and the rotation output shaft of the reducer is transmission-connected to the gear transmission mechanism.

[0014] In the utility model, the gear transmission mechanism includes a rotating toothed disc, a driving shaft and a driving gear. The rotating toothed disc is mounted on the outside of the rotating circular shaft and is fixedly connected to the rotating circular shaft by welding. The upper mounting seat is provided with an avoidance through hole extending from top to bottom. The upper end of the driving shaft passes through the avoidance through hole and is fixed to the rotating output shaft of the reducer by a coupling. The driving gear is fixed to the lower end of the driving shaft and meshes with the rotating toothed disc.

[0015] In the utility model, the bearing structure includes a first tapered roller bearing, a second tapered roller bearing and a one-way thrust ball bearing which are sleeved outside the vertical circular shaft. The upper part of the vertical cavity is provided with a first mounting cavity, the first tapered roller bearing is mounted in the first mounting cavity, the inner ring of the first tapered roller bearing abuts against the bottom of the upper mounting seat and the outer circumferential surface of the vertical circular shaft at the same time, and the outer ring abuts against the cavity wall of the first mounting cavity;

[0016] A second mounting cavity is provided at the lower part of the vertical cavity. The second tapered roller bearing is installed in the second mounting cavity. The inner ring of the second tapered roller bearing abuts against the outer circumferential surface of the vertical circular shaft, and the outer ring abuts against the cavity wall of the second mounting cavity.

[0017] An avoidance cavity for allowing the shaft ring of the single-direction thrust ball bearing to rotate is provided in the second mounting cavity. The seat ring of the single-direction thrust ball bearing abuts against the top of the lower mounting seat, and the shaft ring of the single-direction thrust ball bearing abuts against the bottom of the inner ring of the second tapered roller bearing in the avoidance cavity.

[0018] In the present utility model, the upper mounting seat is provided with a fitting through hole penetrating from top to bottom. After the column passes through the fitting through hole, it is fixedly welded to the upper mounting seat by welding.

[0019] In the present utility model, at least two reinforcing support plates are provided at the bottom of the lower mounting seat. One side end of the reinforcing support plate is fixedly welded to the outer circumferential surface of the column, and the top is fixedly welded to the bottom of the lower mounting seat.

[0020] In the present utility model, a cable protection pipe is provided on the side surface of the column, and at least part of the motor cable and the cantilever cable pass through the cable protection pipe.

[0021] In the present utility model, a first buffer rubber block for buffering when the electric traveling mechanism moves to the starting point of the stroke and a second buffer rubber block for buffering when the electric traveling mechanism moves to the end point of the stroke are provided on the cross beam. The electric traveling mechanism is located between the first buffer rubber block and the second buffer rubber block.

[0022] Advantages of the present utility model: In the present utility model, the upper mounting seat and the lower mounting seat are fixedly welded to the column, so that the upper mounting seat and the lower mounting seat cannot move relative to the column. Then, the support frame is rotationally mounted by using the upper mounting seat and the lower mounting seat, effectively improving the mounting stability of the support frame. Moreover, the rotating circular shaft, the cross beam, the reinforcing diagonal rod and the fixed pull rod form a trapezoidal support structure, effectively enhancing the rigidity and load-bearing capacity of the support frame and effectively improving the use stability of the support frame. In summary, while solving the problems of the prior art, the cantilever hoisting of the present utility model significantly improves the stability, load-bearing capacity and use efficiency of the equipment, and has good practical value. Brief Description of the Drawings

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0024] Figure 1 is a structural schematic diagram of the cantilever hoisting;

[0025] Figure 2 is a combined schematic diagram of the support frame and the column;

[0026] Figure 3 Schematic diagram of the combination of a motor device, a gear transmission mechanism and the rotating circular shaft;

[0027] Figure 4 Schematic diagram of the installation of the vertical circular shaft. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0029] It should be noted that if there are any directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present utility model, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0031] Refer to Figures 1-4, a cantilever hoisting device, comprising a column 1, a support frame 2, an electric traveling mechanism 3 and an electric hoist 5. A support base for connecting to the ground is provided at the bottom of the column 1. The support frame 2 includes a rotating circular shaft 21, a cross beam 22 and a reinforcing diagonal rod 23. One end of the cross beam 22 and one end of the reinforcing diagonal rod 23 are both welded to the outer peripheral surface of the rotating circular shaft 21. The reinforcing diagonal rod 23 is located above the cross beam 22. The other end of the reinforcing diagonal rod 23 is fixedly connected to a fixed pull rod 24 welded to the top of the other end of the cross beam 22. The electric hoist 5 is slidably mounted on the cross beam 22 through the electric traveling mechanism 3. This design enables the rotating circular shaft 21, the cross beam 22, the reinforcing diagonal rod 23 and the fixed pull rod 24 to form a trapezoidal support structure, effectively enhancing the rigidity and load-bearing capacity of the support frame 2. An upper mounting seat 6 and a lower mounting seat 7 located below the upper mounting seat 6 are welded to the column 1. This fixing method avoids the loosening problem that may be caused by traditional fixing clamps, improving the installation accuracy and stability of the support frame 2. A vertical cavity 211 is provided along the axial direction of the rotating circular shaft 21. A vertical circular shaft 8 is inserted into the vertical cavity 211. The upper end of the vertical circular shaft 8 is fixed to the upper mounting seat 6, and the lower end is fixed to the lower mounting seat 7. A bearing structure for rotatably connecting the rotating circular shaft 21 and the vertical circular shaft 8 is provided in the vertical cavity 211. A motor device 9 for driving the support frame 2 to rotate around the vertical circular shaft 8 is provided at the top of the column 1. The motor device 9 is in transmission connection with the rotating circular shaft 21 through a gear transmission mechanism 10. The motor device 9 can drive the support frame 2 to rotate smoothly around the vertical circular shaft 8, realizing the flexible transfer of materials.

[0032] In this embodiment, the upper mounting seat 6 and the lower mounting seat 7 are welded and fixed to the column 1, so that the upper mounting seat 6 and the lower mounting seat 7 cannot move relative to the column 1. Then, the support frame 2 is rotatably mounted by using the upper mounting seat 6 and the lower mounting seat 7, effectively improving the installation stability of the support frame 2. Moreover, the rotating circular shaft 21, the cross beam 22, the reinforcing diagonal rod 23 and the fixed pull rod 24 form a trapezoidal support structure, effectively enhancing the rigidity and load-bearing capacity of the support frame 2 and effectively improving the use stability of the support frame 2. In summary, while solving the problems of the prior art, the cantilever hoisting device of this embodiment significantly improves the stability, load-bearing capacity and use efficiency of the equipment, and has good practical value.

[0033] In this embodiment, in order to improve the combined quality between the reinforced diagonal rod 23 and the cross beam 22, a plurality of reinforced tie rods 25 are welded to the bottom surface of the reinforced diagonal rod 23. The plurality of reinforced tie rods 25 are horizontally arranged and distributed between the rotating circular shaft 21 and the fixed tie rod 24 along the length direction of the cross beam 22, and the bottom of the reinforced tie rod 25 is fixedly welded to the top of the cross beam 22. Further, the reinforced diagonal rod 23, the fixed tie rod 24, and the reinforced tie rod 25 are all made of square tubes with the same cross-sectional size, which is beneficial for the fixed tie rod 24 and the reinforced tie rod 25 to be welded together with the reinforced diagonal rod 23 and then welded and fixed to the rotating circular shaft 21 and the cross beam 22.

[0034] In this embodiment, in order to improve the combined quality among the rotating circular shaft 21, the cross beam 22, and the reinforced diagonal rod 23, a reinforced support plate 26 is welded to the outer peripheral surface of the rotating circular shaft 21. The top of the reinforced support plate 26 is fixedly welded to the bottom surface of the reinforced diagonal rod 23, and the bottom is fixedly welded to the top of the cross beam 22.

[0035] In this embodiment, a motor base 11 is installed at the top of the column 1. The motor device 9 includes a driving motor 91 and a speed reducer 92. The speed reducer 92 is installed on the top of the motor base 11. The driving motor 91 is powered by a motor cable. The driving motor 91 is installed on the speed reducer 92. The output rotating shaft of the driving motor 91 is in transmission connection with the rotating input end of the speed reducer 92, and the rotating output shaft of the speed reducer 92 is in transmission connection with the gear transmission mechanism 10.

[0036] In this embodiment, the gear transmission mechanism 10 includes a rotating gear disk 101, a driving rotating shaft 102, and a driving gear 103. The rotating gear disk 101 is sleeved outside the rotating circular shaft 21 and is fixedly connected to the rotating circular shaft 21 by welding to ensure the installation quality of the rotating gear disk 101. The upper mounting seat 6 is provided with an avoidance through hole penetrating from top to bottom. The rotating output shaft of the speed reducer 92 corresponds to the upper part of the avoidance through hole. The upper end of the driving rotating shaft 102 passes through the avoidance through hole and is fixed to the rotating output shaft of the speed reducer 92 by a coupling 104. The driving gear 103 is fixed to the lower end of the driving rotating shaft 102 and meshes with the rotating gear disk 101, so that the motor device 9 can drive the support frame 2 to rotate under the transmission of the driving gear 103 and the rotating gear disk 101.

[0037] In this embodiment, the bearing structure includes a first tapered roller bearing 12, a second tapered roller bearing 13, and a single-direction thrust ball bearing 14 sleeved outside the vertical circular shaft 8. The upper part of the vertical cavity 211 is provided with a first mounting cavity, and the first tapered roller bearing 12 is mounted in the first mounting cavity. The inner ring of the first tapered roller bearing 12 is in contact with both the bottom of the upper mounting seat 6 and the outer circumferential surface of the vertical circular shaft 8, and the outer ring is in contact with the wall of the first mounting cavity. Further, the lower part of the vertical cavity 211 is provided with a second mounting cavity, and the second tapered roller bearing 13 is mounted in the second mounting cavity. The inner ring of the second tapered roller bearing 13 is in contact with the outer circumferential surface of the vertical circular shaft 8, and the outer ring is in contact with the wall of the second mounting cavity. Still further, a relief cavity for allowing the shaft ring of the single-direction thrust ball bearing 14 to rotate is provided in the second mounting cavity. The seat ring of the single-direction thrust ball bearing 14 abuts against the top of the lower mounting seat 7, and the shaft ring of the single-direction thrust ball bearing 14 abuts against the bottom of the inner ring of the second tapered roller bearing 13 in the relief cavity. Through the arrangement of the first tapered roller bearing 12, the second tapered roller bearing 13, and the single-direction thrust ball bearing 14, the rotational stability of the support frame 2 can be improved.

[0038] In this embodiment, the upper mounting seat 6 is provided with a mating through hole penetrating from top to bottom. After the column 1 passes through and enters the mating through hole, it is welded and fixed to the upper mounting seat 6 by welding. By welding after the column 1 is adapted to the mating through hole, the combined quality between the upper mounting seat 6 and the column 1 is better, effectively enhancing the structural stability of the upper mounting seat 6.

[0039] In this embodiment, at least two reinforcing support plates 71 are provided at the bottom of the lower mounting seat 7. One side end of the reinforcing support plate 71 is welded and fixed to the outer circumferential surface of the column 1, and the top is welded and fixed to the bottom of the lower mounting seat 7. Through the reinforcing support plate 71, the structural stability of the lower mounting seat 7 fixed on the column 1 can be enhanced.

[0040] In this embodiment, both the upper mounting base 6 and the lower mounting base 7 are flat plates. The upper mounting base 6 is provided with an upper fitting hole penetrating from top to bottom. The upper end of the vertical circular shaft 8 is fitted in the upper fitting hole. A top screw section 81 protruding above the top of the upper mounting base 6 is provided on the top of the vertical circular shaft 8. An upper locking structure 15 pressing against the top of the upper mounting base 6 is mounted on the top screw section 81. The upper locking structure 15 includes a first round nut gasket and two first grooved round nuts respectively located at the upper and lower ends of the first round nut gasket. The first round nut gasket is sleeved on the top screw section 81. The first grooved round nut is threadedly sleeved on the upper screw end. The lower first grooved round nut abuts against the top of the upper mounting base 6, and the upper first grooved round nut abuts against the top of the first round nut gasket, so that the upper first grooved round nut locks the lower first grooved round nut to ensure the installation stability of the upper end of the vertical circular shaft 8. Similarly, the lower mounting base 7 is provided with a lower fitting hole penetrating from top to bottom. The lower end of the vertical circular shaft 8 is fitted in the lower fitting hole. A bottom screw section 82 protruding below the bottom of the lower mounting base 7 is provided on the bottom of the vertical circular shaft 8. A lower locking structure 16 pressing against the top of the lower mounting base 7 is mounted on the bottom screw section 82. The lower locking structure 16 includes a second round nut gasket and two second grooved round nuts respectively located at the upper and lower ends of the second round nut gasket. The second round nut gasket is sleeved on the bottom screw section 82. The second grooved round nut is threadedly sleeved on the upper screw end. The upper second grooved round nut abuts against the bottom of the lower mounting base 7, and the lower second grooved round nut abuts against the bottom of the second round nut gasket, so that the lower second grooved round nut locks the upper second grooved round nut to ensure the installation stability of the lower end of the vertical circular shaft 8.

[0041] In this embodiment, two support arms 27 are provided on the cross beam 22. A steel wire rope 28 is commonly connected by the two support arms 27. A plurality of cable trolleys 29 are slidably mounted on the steel wire rope 28. The plurality of cable trolleys 29 are commonly connected with a cantilever cable. The length of the cantilever cable connected to each cable trolley 29 is the same. The cantilever cable extends and folds along with the movement of the cable trolley 29. The cantilever cable is electrically connected to the electric traveling mechanism 3 and the electric hoist 5.

[0042] In this embodiment, the drive motor 91, the electric traveling mechanism 3 and the electric hoist 5 are all connected and controlled by a control device. The control device can be mounted on the electric traveling mechanism 3 or on the column 1, depending on the actual situation. The control device is communicatively connected to a remote controller. The user can send a control command to the control device by using the remote controller. The control device controls the drive motor 91, the electric traveling mechanism 3 or the electric hoist 5 to work according to the control command. The motor cable, the control device and the remote controller are not shown in the drawings.

[0043] In this embodiment, a first rotation limit switch 72 and a second rotation limit switch 73 are provided on the lower mounting base 7, and both the first rotation limit switch 72 and the second rotation limit switch 73 are electrically connected to the control device; when the support frame 2 abuts against the monitoring end of the first rotation limit switch 72 during clockwise rotation, the control device controls the driving motor 91 to stop working, so that the support frame 2 cannot continue to rotate clockwise. When the support frame 2 abuts against the monitoring end of the second rotation limit switch 73 during counterclockwise rotation, the control device controls the driving motor 91 to stop working, so that the support frame 2 cannot continue to rotate counterclockwise, thereby ensuring the safety of use.

[0044] In this embodiment, a cable protection pipe 17 is provided on the side surface of the column 1, and at least part of the motor cable and the cantilever cable pass through the cable protection pipe 17, thereby reducing the probability of damage to the motor cable and the cantilever cable when the column 1 is collided by external objects.

[0045] In this embodiment, a first buffer rubber block 18 for buffering when the electric traveling mechanism 3 moves to the starting point of the stroke and a second buffer rubber block 19 for buffering when the electric traveling mechanism 3 moves to the end point of the stroke are provided on the cross beam 22. The electric traveling mechanism 3 is located between the first buffer rubber block 18 and the second buffer rubber block 19, thereby reducing the impact force when the electric traveling mechanism 3 moves to the starting point and the end point of the stroke.

[0046] The above are only the preferred embodiments of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. A cantilever hoist, comprising a column (1), a support frame (2), an electric travel mechanism (3) and an electric hoist (5), characterized in that: The support frame (2) comprises a rotating circular shaft (21), a crossbeam (22) and a reinforcing inclined rod (23); one end of the crossbeam (22) and one end of the reinforcing inclined rod (23) are both welded to the outer circumferential surface of the rotating circular shaft (21); the reinforcing inclined rod (23) is located above the crossbeam (22); the other end of the reinforcing inclined rod (23) is fixedly connected to a fixed pull rod (24) welded to the top of the other end of the crossbeam (22); and the electric hoist (5) is slidably mounted on the crossbeam (22) via an electric walking mechanism (3); An upper mounting seat (6) and a lower mounting seat (7) located below the upper mounting seat (6) are welded to the column (1); a vertical cavity (211) is provided on the rotating circular shaft (21) along the axial direction; a vertical circular shaft (8) is inserted into the vertical cavity (211); the upper end of the vertical circular shaft (8) is fixed to the upper mounting seat (6), and the lower end is fixed to the lower mounting seat (7); A bearing structure is provided in the vertical cavity (211) for rotatably connecting the rotating circular shaft (21) and the vertical circular shaft (8); a motor device (9) is provided at the top of the column (1) for driving the support frame (2) to rotate with the vertical circular shaft (8) as the rotation center; the motor device (9) is connected to the rotating circular shaft (21) through a gear transmission mechanism (10).

2. The cantilever hoisting according to claim 1, characterized in that: A plurality of reinforcing tie rods (25) are welded to the bottom surface of the reinforcing diagonal rod (23), and the plurality of reinforcing tie rods (25) are horizontally arranged along the length direction of the crossbeam (22) and distributed between the rotating circular shaft (21) and the fixed tie rod (24).

3. A cantilever hoisting according to claim 1, characterized in that: A reinforcement support plate (26) is welded to the outer circumferential surface of the rotating circular shaft (21); the top of the reinforcement support plate (26) is welded and fixed to the bottom surface of the reinforcement oblique rod (23), and the bottom is welded and fixed to the top of the crossbeam (22).

4. A cantilever hoisting according to claim 1, characterized in that: A motor base (11) is installed on the top of the column (1); the motor device (9) comprises a drive motor (91) and a reducer (92); the reducer (92) is installed on the top of the motor base (11); the drive motor (91) is powered by a motor cable; the drive motor (91) is installed on the reducer (92); the output shaft of the drive motor (91) is transmission-connected to the rotation input end of the reducer (92); and the rotation output shaft of the reducer (92) is transmission-connected to the gear transmission mechanism (10).

5. A cantilever hoisting according to claim 4, characterized in that: The gear transmission mechanism (10) includes a rotating gear disk (101), a driving rotating shaft (102), and a driving gear (103). The rotating gear disk (101) is sleeved outside the rotating circular shaft (21) and is fixedly connected to the rotating circular shaft (21) by welding; the upper mounting seat (6) is provided with an avoidance through hole penetrating from top to bottom. The upper end of the driving rotating shaft (102) passes through the avoidance through hole and is fixedly mounted on the rotating output shaft of the speed reducer (92) by a coupling (104); the driving gear (103) is fixed to the lower end of the driving rotating shaft (102) and meshes with the rotating gear disk (101).

6. A cantilever hoisting according to claim 1, wherein: The bearing structure includes a first tapered roller bearing (12), a second tapered roller bearing (13), and a single-direction thrust ball bearing (14) sleeved outside the vertical circular shaft (8). The upper part of the vertical cavity (211) is provided with a first mounting cavity. The first tapered roller bearing (12) is mounted in the first mounting cavity. The inner ring of the first tapered roller bearing (12) abuts against both the bottom of the upper mounting seat (6) and the outer circumferential surface of the vertical circular shaft (8), and the outer ring abuts against the wall of the first mounting cavity; The lower part of the vertical cavity (211) is provided with a second mounting cavity. The second tapered roller bearing (13) is mounted in the second mounting cavity. The inner ring of the second tapered roller bearing (13) abuts against the outer circumferential surface of the vertical circular shaft (8), and the outer ring abuts against the wall of the second mounting cavity; The second mounting cavity is provided with an avoidance cavity for allowing the shaft ring of the single-direction thrust ball bearing (14) to rotate. The seat ring of the single-direction thrust ball bearing (14) abuts against the top of the lower mounting seat (7), and the shaft ring of the single-direction thrust ball bearing (14) abuts against the bottom of the inner ring of the second tapered roller bearing (13) in the avoidance cavity.

7. A cantilever hoisting according to claim 1, characterized in that: The upper mounting seat (6) is provided with a mating through hole penetrating from top to bottom. After the column (1) passes through the mating through hole, it is fixedly welded to the upper mounting seat (6) by welding.

8. A cantilever hoisting according to claim 1, characterized in that: At least two reinforcing support plates (71) are provided at the bottom of the lower mounting seat (7). One side end of the reinforcing support plate (71) is fixedly welded to the outer circumferential surface of the column (1), and the top is fixedly welded to the bottom of the lower mounting seat (7).

9. A cantilever hoisting according to claim 1, characterized in that: A cable protection pipe (17) is provided on the side surface of the column (1). At least part of the motor cable and the cantilever cable pass through the cable protection pipe (17).

10. A cantilever hoisting according to claim 1, characterized in that: The cross beam (22) is provided with a first buffer rubber block (18) for buffering when the electric traveling mechanism (3) moves to the starting point of the stroke and a second buffer rubber block (19) for buffering when the electric traveling mechanism (3) moves to the end point of the stroke. The electric traveling mechanism (3) is located between the first buffer rubber block (18) and the second buffer rubber block (19).

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