A novel tower crane transport slewing locking device and its disassembly and installation method

Abstract

The present invention discloses a novel tower crane transportation slewing locking device and a disassembly and installation method. The device comprises a lower bearing support, a pin shaft 1, a locking rod, a pin shaft 2 and an upper bearing support. Both ends of the locking rod are provided with ear plates, and the two ear plates are 90° apart. The lower end of the locking rod is connected to the lower bearing support through a pin shaft 1 and a locking nut gasket 1, and the upper end is connected to the upper bearing support through a pin shaft 2 and a locking nut gasket 2. When disassembling, first remove the locking nut gasket 1 and the pin shaft 1; then remove the locking nut gasket 2 and the pin shaft 2; move the locking rod along the direction of the locking rod until the lower end ear plate leaves the lower bearing support; move the locking rod along the horizontal direction until the upper end ear plate leaves the upper bearing support. The steps are reversed during installation. The present invention can realize safe and reliable slewing locking, can effectively deal with the slewing load occurring during transportation, avoid motor damage caused by the slewing load exceeding the motor braking limit, and reasonably utilize the structural space.

Description

Technical Field

[0001] The invention relates to a tower crane slewing locking device and a disassembly and installation method, belonging to the technical field of crane safety devices. Background Art

[0002] In the transportation process of existing tower cranes, the slewing parts, i.e., the upper and lower bearings connected by the slewing support, are generally transported as a whole. Especially when the semi-complete machine is transported overseas, the slewing parts need to be locked to prevent the slewing parts from rotating under external influences during transportation, which may cause dangers such as collisions of tower crane parts and displacement of the center of gravity. Therefore, slewing locking plays a very important role in tower crane transportation operations. The current conventional solution is to use the tower crane slewing motor reducer for braking. This method has the potential safety hazard of objective unfavorable loads exceeding the limit of the slewing brake itself under poor transportation stability conditions. Once the braking limit of the slewing device is exceeded, the slewing device will be damaged and fail, and even slewing motion will occur, causing dangers such as collisions and displacement of the center of gravity, which is very unfavorable to tower crane transportation operations. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a stable and safe tower crane slewing locking device in view of the defects in the prior art.

[0004] To solve this technical problem, the present invention provides a new type of tower crane transport rotation locking device, including a lower bearing support, a pin shaft 1, a locking rod, a pin shaft 2 and an upper bearing support. Ear plates are provided at both ends of the locking rod, and the two ear plates are 90° apart; the lower end of the locking rod is connected to the lower bearing support through a pin shaft 1 and a locking nut gasket 1, and the upper end of the locking rod is connected to the upper bearing support through a pin shaft 2 and a locking nut gasket 2.

[0005] An open slot is provided between the ear plates at the upper end of the locking rod, and the slot width is equivalent to the inner spacing of the ear plates.

[0006] The device is symmetrically arranged between the upper and lower bearings and outside the slewing support with the rotation center axis; the lower bearing support is installed on the upper flange plate of the lower bearing of the tower crane, and the upper bearing support is welded on the upper bearing. The ear plate connected to the locking rod is at an angle of 30° relative to the horizontal plane, which is the same as the inclination angle of the configured locking rod after installation.

[0007] The present invention also provides a method for disassembling and installing the novel tower crane transport slewing locking device, comprising the following steps:

[0008] (I) Disassembly method:

[0009] 1) Remove the locking nut, washer 1 and pin 1;

[0010] 2) Remove the locking nut, washer 2 and pin 2;

[0011] 3) Move the locking rod along the direction of the locking rod until the lower end ear plate leaves the lower bearing seat;

[0012] 4) Move the locking rod horizontally until the upper ear plate leaves the upper bearing seat.

[0013] (2) Installation method: opposite to the disassembly steps.

[0014] Beneficial effects: The present invention can achieve safe and reliable rotation locking. Compared with traditional rotation motor braking, the present invention is a pure mechanical brake, which can effectively cope with the rotation load occurring during transportation and avoid damage to the motor caused by the rotation load exceeding the motor braking limit; relative to the vertical direction pin locking, an inclined locking rod is adopted, which can not only fully convert the bending moment in the horizontal plane direction into the axial tension and compression of the locking rod, but also reasonably utilize the limited space between the upper and lower bearings, which can not only safely and stably solve the large torque caused by the rotation, but also reasonably utilize the structural space, avoiding the related waste of materials and the adverse effects of the whole machine caused by the weight increase of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the axial explosion of the present invention;

[0017] Figure 3 It is a schematic diagram of the working state of the present invention.

[0018] In the figure: 1 lower bearing support, 2 pin shaft 1, 3 locking nut gasket 1, 4 locking rod, 5 pin shaft 2, 6 upper bearing support, 7 locking nut gasket 2. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 Shown is a schematic structural diagram of the present invention.

[0021] Figure 2 Shown is a schematic diagram of an axial explosion of the present invention.

[0022] The present invention provides a new type of tower crane transport rotation locking device, including a lower bearing support 1, a pin shaft 2, a locking rod 4, a pin shaft 5 and an upper bearing support 6, wherein ear plates are provided at both ends of the locking rod 4, and the two ear plates are 90° apart; the lower end of the locking rod 4 is connected to the lower bearing support 1 through a pin shaft 2 and a locking nut gasket 3, and the upper end thereof is connected to the upper bearing support 6 through a pin shaft 5 and a locking nut gasket 7.

[0023] An open slot is provided between the ear plates at the upper end of the locking rod 4, and the slot width is equivalent to the inner spacing of the ear plates.

[0024] Figure 3 Shown is a schematic diagram of the working state of the present invention.

[0025] The device is symmetrically arranged between the upper and lower bearings and outside the slewing support with the central axis of rotation; the lower bearing support 1 is installed on the upper flange plate of the lower bearing of the tower crane, and the upper bearing support 6 is welded on the upper bearing. The ear plate connected to the locking rod 4 is at an angle of 30° relative to the horizontal plane, which is the same as the tilt angle of the configured locking rod 4 after installation. It can be adjusted according to the installation space of the locking device.

[0026] The present invention also provides a method for disassembling and installing the novel tower crane transport slewing locking device, comprising the following steps:

[0027] (I) Disassembly method:

[0028] 1) Remove the locking nut, washer-3 and pin-2;

[0029] 2) Remove the locking nut washer 27 and the pin 25;

[0030] 3) Move the locking rod 4 along the direction of the locking rod 4 until the lower end ear plate leaves the lower bearing support 1;

[0031] 4) Move the locking rod 4 in the horizontal direction until the upper end ear plate leaves the upper bearing support 6.

[0032] (2) Installation method: opposite to the disassembly steps.

[0033] The present invention can realize the slewing locking in tower crane transportation, especially in the whole machine assembly transportation operation, to avoid the rotation of the slewing parts under the influence of the outside world during the transportation process, which may cause the tower crane parts to collide, the center of gravity to shift and other dangers. Therefore, the slewing locking plays a very important role in the tower crane transportation operation. The present invention fully considers the large torque caused by the free rotation of the upper and lower structures of the slewing support or the rotation under the action of external loads. Since the height of the slewing support of a large tower crane is generally large, the slewing braking torque generated by this torque will be very large. It is difficult to achieve safe and effective slewing locking by slewing motor braking and simple pin locking. The former has the risk of exceeding the braking load limit and damaging the slewing motor, and the latter has a large size of the bearing pin, resulting in insufficient installation space for the upper and lower bearings or unnecessary material utilization of the upper and lower bearings, and even the upper and lower connecting structural parts of the slewing support themselves are difficult to bear; therefore, the present invention creatively adopts an inclined locking rod, which can not only fully convert the bending moment in the horizontal plane direction into the axial tension and compression of the locking rod, but also reasonably utilize the limited control unit between the upper and lower bearings, which not only safely and stably solves the large torque caused by the rotation, but also reasonably utilizes the structural space, avoiding the related material waste and the adverse effects of the whole machine caused by the weight increase of components, and has great practical significance and economic value in the slewing locking operation of the tower crane.

[0034] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A new type of tower crane transport rotation locking device, characterized in that: It comprises a lower bearing support (1), a pin shaft 1 (2), a locking rod (4), a pin shaft 2 (5) and an upper bearing support (6), wherein both ends of the locking rod (4) are provided with ear plates, and the two ear plates are 90° apart; the lower end of the locking rod (4) is connected to the lower bearing support (1) through a pin shaft 1 (2) and a locking nut gasket 1 (3), and the upper end of the locking rod (4) is connected to the upper bearing support (6) through a pin shaft 2 (5) and a locking nut gasket 2 (7); the device is symmetrically arranged between the upper and lower bearings and outside the slewing support with a rotation center axis; the lower bearing support (1) is installed on the upper flange plate of the lower bearing of the tower crane, and the upper bearing support (6) is welded on the upper bearing, and the ear plate connected to the locking rod (4) is at an angle of 30° relative to the horizontal plane, which is the same as the tilt angle of the configured locking rod (4) after installation; During disassembly: 1) remove the locking nut washer 1 (3) and the pin 1 (2); 2) remove the locking nut washer 2 (7) and the pin 2 (5); 3) move the locking rod (4) along the direction of the locking rod (4) until the lower end ear plate leaves the lower bearing support (1); 4) move the locking rod (4) in the horizontal direction until the upper end ear plate leaves the upper bearing support (6); The installation method is the reverse of the removal steps.

2. The new tower crane transport rotation locking device according to claim 1 is characterized in that: An open slot is provided between the ear plates at the upper end of the locking rod (4), and the slot width is equivalent to the inner spacing of the ear plates.

3. A method for disassembling and installing the new tower crane transport slewing locking device according to claim 1 or 2, characterized in that: The steps include: (I) Disassembly method: 1) Remove the locking nut washer 1 (3) and the pin 1 (2); 2) Remove the locking nut washer 2 (7) and the pin 2 (5); 3) moving the locking rod (4) along the direction of the locking rod (4) until the lower end ear plate leaves the lower bearing support (1); 4) moving the locking rod (4) in the horizontal direction until the upper end ear plate leaves the upper bearing seat (6); (2) Installation method: opposite to the disassembly steps.

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