CN220449565U

CN220449565U - Box girder template hoisting device

Info

Publication number: CN220449565U
Application number: CN202321826093.4U
Authority: CN
Inventors: 胡晓冬; 章其旺; 何兵; 张天宇; 苏勇
Original assignee: China 19th Metallurgical Corp
Current assignee: China 19th Metallurgical Corp
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-02-06
Anticipated expiration: 2033-07-12

Abstract

The utility model relates to a box girder formwork lifting device, and belongs to the technical field of lifting equipment in building construction. The lifting device comprises a frame and a lifting rope, wherein one end of the lifting rope is connected with a lifting hook, a roller which is rotationally arranged is arranged at the top end of the frame through a bearing and a rotating shaft, the axes of the roller and the rotating shaft are horizontally arranged, two ends of the roller are fixedly connected with the rotating shaft, the outer ring of the bearing is fixedly arranged on the frame, the rotating shaft is matched with the inner ring of the bearing, and one end of the lifting rope, which is not provided with the lifting hook, is fixedly connected with the roller; the rotary shaft at one end of the roller is fixedly connected with a manual crank, a unidirectional ratchet wheel is coaxially and fixedly arranged on the rotary shaft, an anti-reverse rod with a tension spring is arranged at the top of the unidirectional ratchet wheel at the top end of the rack, a ratchet matched with the unidirectional ratchet wheel is arranged on the anti-reverse rod, and the anti-reverse mechanism is composed of the unidirectional ratchet wheel, the anti-reverse rod, the tension spring and other parts, so that the roller is prevented from reversely rotating in the hoisting process, the safety in the hoisting process can be well guaranteed, and the construction efficiency is improved.

Description

Box girder template hoisting device

Technical Field

The utility model relates to a box girder formwork lifting device, and belongs to the technical field of lifting equipment in building construction.

Background

In building construction, installing a box girder formwork is a relatively common construction step, and installing the box girder formwork to a designated location requires operation using a hoisting device. The traditional hoisting scheme is usually realized by using large hoisting equipment such as a gantry crane, a steam crane, a tower crane and the like, has higher cost and has poorer economy for a small box girder template.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the box girder template lifting device is convenient to manually lift a small box girder template.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the box girder template hoisting device comprises a frame and a lifting rope, wherein one end of the lifting rope is connected with a lifting hook, a rotary drum is arranged at the top end of the frame through a bearing and a rotary shaft, the axes of the rotary drum and the rotary shaft are horizontally arranged, two ends of the rotary drum are fixedly connected with the rotary shaft, the outer ring of the bearing is fixedly arranged on the frame, the rotary shaft is matched with the inner ring of the bearing, and one end of the lifting rope, which is not provided with the lifting hook, is fixedly connected with the rotary drum; the rotary shaft at one end of the roller is fixedly connected with a manual crank, a unidirectional ratchet wheel is coaxially and fixedly arranged on the rotary shaft, an anti-reverse rod is arranged at the top of the unidirectional ratchet wheel, one end of the anti-reverse rod is fixedly connected or hinged with the rack, the lower surface of the other end of the anti-reverse rod is connected with the rack through a tension spring, when the end part of the anti-reverse rod is fixedly connected with the rack, the anti-reverse rod is of an elastic arm structure, a ratchet wheel matched with the unidirectional ratchet wheel is arranged on the lower surface of the middle part of the anti-reverse rod, when the tension spring is in a natural state, the ratchet wheel is clamped with the unidirectional ratchet wheel, at the moment, the unidirectional ratchet wheel can only rotate positively, and the roller can only wind a lifting rope to drive the lifting hook to rise; when the end of the anti-reverse rod provided with the tension spring is lifted upwards, the ratchet can be driven to be separated from the unidirectional ratchet, and the unidirectional ratchet can rotate in a bidirectional and free mode.

As a further preferable embodiment of the present utility model: the rotary shaft and the manual crank are of an integrated structure, and are manufactured by bending deformed steel bars, and the rotary shaft penetrates through the center of the rotary shaft and then is welded and fixed at the two ends of the rotary shaft; the rotating shaft is welded and fixed with the inner ring of the bearing; the rotating shaft is welded and fixed with the central through hole of the unidirectional ratchet wheel.

As a further preferable embodiment of the present utility model: the handle sleeve is sleeved on the manual crank, and a limiting piece for preventing the crank sleeve from falling off is arranged at the end part of the manual crank.

As a further preferable embodiment of the present utility model: the bearing is fixed at the top end of the frame through the press cover of the bearing and the bolt.

As a further preferable embodiment of the present utility model: the axial both ends of cylinder are provided with the terminal surface limiting plate respectively, and the radial extension of terminal surface limiting plate along the cylinder, and the outward flange of terminal surface limiting plate sets up for the outer disc protrusion of cylinder.

As a further preferable embodiment of the present utility model: the frame is of a frustum-shaped frame structure, the frame comprises a plurality of rectangular frame beams which are vertically layered, the centers of the inner cavities of the rectangular frame beams are positioned on the same vertical axis, the length and width dimensions of rectangular distribution wires of the rectangular frame beams are in increasing trend from top to bottom, and four corners of the rectangular frame beams are respectively connected through oblique support columns; the bearing is fixedly arranged in the middle of two beams which are oppositely arranged in the beams of the rectangular frame at the uppermost layer.

The beneficial effects of the utility model are as follows: when the box girder template is implemented, the box girder template is fixed by using a steel wire rope or other hoisting auxiliary equipment in a conventional mode and then is connected with the lifting hook, then the roller is driven to rotate by using the manual crank, and the roller winds the lifting rope to drive the lifting hook and the box girder template to ascend. The utility model is provided with the non-return mechanism composed of the unidirectional ratchet wheel, the non-return rod, the tension spring and other parts, so as to prevent the roller from reversely rotating in the hoisting process, thereby better ensuring the safety in the hoisting process, and the box girder template can hover at any height position by means of the non-return mechanism, for example, in the hoisting process, if a worker is tired, the worker can rest for a moment and then continue to rotate the manual crank; after the box girder template is hoisted in place, when the box girder template is required to be installed and positioned, the box girder template can be prevented from falling by means of the non-return mechanism, so that the number of operators can be reduced. The utility model is a small and portable simple device on the whole, so that the operation is simple, and common workers can easily grasp the technical key. The utility model is composed of a small amount of conventional parts, and compared with the traditional hoisting equipment, the cost is obviously reduced.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a schematic view of a bearing mounting structure of the present utility model.

Fig. 3 is a schematic structural view of the non-return mechanism of the present utility model.

Part numbers in the figures: the lifting device comprises a 1-roller, a 2-lifting rope, a 3-rack, a 4-reverse-preventing rod, a 5-rotating shaft, a 6-manual crank, a 7-lifting hook, an 8-bearing gland, a 9-bearing, a 10-unidirectional ratchet wheel, an 11-end face limiting plate, a 12-supporting angle steel, a 13-crank sleeve, a 14-limiting piece, a 15-tension spring, a 16-ratchet wheel, a 31-rectangular frame cross beam and a 32-oblique support column.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and examples.

As shown in fig. 1 to 3, the utility model comprises a frame 3 and a lifting rope 2, wherein one end of the lifting rope 2 is connected with a lifting hook 7, a rotary drum 1 is arranged at the top end of the frame 3 through a bearing 9 and a rotary shaft 5, the axes of the drum 1 and the rotary shaft 5 are horizontally arranged, two ends of the drum 1 are fixedly connected with the rotary shaft 5, the outer ring of the bearing 9 is fixedly arranged on the frame 3, the rotary shaft 5 is matched with the inner ring of the bearing 9, and one end of the lifting rope 2, which is not provided with the lifting hook 7, is fixedly connected with the drum 1; the rotary shaft 5 at one end of the rotary drum 1 is fixedly connected with the manual crank 6, the rotary shaft 5 is coaxially and fixedly provided with the unidirectional ratchet 10, the top end of the machine frame 3 is provided with the anti-reverse rod 4 above the unidirectional ratchet 10, one end of the anti-reverse rod 4 is fixedly connected or hinged with the machine frame 3, the lower surface of the other end of the anti-reverse rod 4 is connected with the machine frame 3 through a tension spring 15, when the end of the anti-reverse rod 4 is fixedly connected with the machine frame 3, the anti-reverse rod 4 is of an elastic arm structure (namely, the elastic deformation capacity of the rod body can be utilized to bend and deform and automatically reset), the ratchet 16 matched with the unidirectional ratchet 10 is arranged on the lower surface of the middle part of the anti-reverse rod 4, when the tension spring 15 is in a natural state, the ratchet 16 is clamped with the unidirectional ratchet 10, and the unidirectional ratchet 10 can only rotate forwards at the moment, and the rotary drum 1 can only wind the lifting rope 2 to drive the lifting hook 7 to ascend; when the end of the anti-reverse rod 4 provided with the tension spring 15 is lifted upwards, the ratchet 16 can be driven to be separated from the unidirectional ratchet 10, and the unidirectional ratchet 10 can rotate freely in two directions. It will be appreciated that the purpose of the anti-backup bar 4, whether it be in the form of a hinge or a lever arm, is to meet the mating requirements of the ratchet 16 and the unidirectional ratchet 10, the hinge pivot being parallel to the axis of the shaft 5. When the elastic arm is adopted, the anti-reverse rod 4 can be made into a long strip shape by a thin steel plate, so that the tension spring 15 and the ratchet 16 are conveniently arranged, the middle part of the anti-reverse rod 4 can be properly bent, and the ratchet 16 is generally welded and fixed. The utility model is provided with the non-return mechanism composed of the unidirectional ratchet 10, the non-return rod 4, the tension spring 15 and other parts, prevents the roller 1 from reversely rotating in the hoisting process, can better ensure the safety in the hoisting process, and can hover at any height position by means of the non-return mechanism. After the hoisting is completed, the end of the anti-reverse rod 4 provided with the tension spring 15 is lifted upwards manually to drive the ratchet 16 to separate from the unidirectional ratchet 10, and the unidirectional ratchet 10 can rotate freely in two directions at the moment, so that the lifting hook can be lowered for hoisting next time.

For convenient processing and manufacturing, the rotating shaft 5 and the manual crank 6 are of an integrated structure and are manufactured by bending deformed steel bars. The manual crank 6 may be configured in an ergonomic structure, and may generally have a Z-shaped structure, including two cross bar portions and a vertical bar portion, where one of the cross bar portions is coaxial with the shaft 5, the other cross bar portion is used as a holding end, and the length of the middle vertical bar portion is greater than the radius of the drum 1, and the middle vertical bar portion serves as a force arm. In the concrete implementation, the rotary shaft 5 passes through the center of the roller 1 and then the roller 1 and the rotary shaft 5 are welded and fixed at the two ends of the roller 1; the rotating shaft 5 is welded and fixed with the inner ring of the bearing 9; the rotating shaft 5 is welded and fixed with the central through hole of the unidirectional ratchet 10.

In order to facilitate the holding operation, a crank sleeve 13 is arranged at the holding end of the manual crank 6, the crank sleeve 13 is sleeved on the manual crank 6, and a limiting piece 14 for preventing the crank sleeve 13 from falling off is arranged at the end part of the manual crank 6. The limiting piece 14 can be welded and fixed, can be connected and fixed by utilizing a self-threaded structure, and can be connected and fixed by utilizing an independent screw.

For convenient assembly, the bearing 9 is fixed on the top end of the frame 3 through the bearing gland 8 matched with bolts in a pressing mode. Preferably, a supporting angle 12 for mounting the bearing 9 and the bearing cover 8 can be provided at the top end of the frame 3.

For the structure to be more reliable, the axial both ends of cylinder 1 are provided with terminal surface limiting plate 11 respectively, and terminal surface limiting plate 11 extends along the radial of cylinder 1, and the outward flange of terminal surface limiting plate 11 is protruding the setting for the outer disc of cylinder 1. The end surface limiting plate 11 can perform the limiting function on winding and releasing of the lifting rope 2, generally adopts a circular ring-shaped plate, and the protruding height relative to the outer circular surface of the roller 1 can be designed to be about 50 mm.

In order to make the structure simple and reliable, the rack 3 is a frustum-shaped frame structure, the rack 3 comprises a plurality of rectangular frame beams 31 which are arranged in a layered manner along the vertical direction, the centers of the inner cavities of the rectangular frame beams 31 are positioned on the same vertical axis, the rectangular distribution line length and width dimensions of the rectangular frame beams 31 are in an increasing trend from top to bottom (namely, the length and width of the rectangular frame beam 31 at the uppermost layer are minimum, the length and width of the rectangular frame beam 31 at the second layer which is counted downwards are respectively increased by the rectangular frame beam 31 at the uppermost layer, and the following is analogized), and the four corners of the rectangular frame beams 31 are respectively connected through inclined support columns 32; the bearing 9 is fixedly arranged in the middle of two beams which are oppositely arranged in the rectangular frame beam 31 at the uppermost layer. The specific number of rectangular frame beams 31 can be flexibly designed according to the overall height of the machine frame 3. The rectangular frame cross beam 31 and the diagonal support columns 32 can be made of round steel bars, then welded and fixed, and the support angle steel 12 for installing the bearing 9 and the bearing cover 8 can be additionally arranged on the rectangular frame cross beam 31 at the uppermost layer.

Claims

1. Box girder template jack-up hoist device, including frame (3) and lifting rope (2), the one end of lifting rope (2) is connected with lifting hook (7), its characterized in that: the top end of the frame (3) is provided with a rotary roller (1) through a bearing (9) and a rotating shaft (5), the axes of the roller (1) and the rotating shaft (5) are horizontally arranged, two ends of the roller (1) are fixedly connected with the rotating shaft (5), the outer ring of the bearing (9) is fixedly arranged on the frame (3), the rotating shaft (5) is matched with the inner ring of the bearing (9), and one end of the lifting rope (2) which is not provided with a lifting hook (7) is fixedly connected with the roller (1); the rotary shaft (5) at one end of the rotary drum (1) is fixedly connected with the manual crank (6), the unidirectional ratchet (10) is coaxially and fixedly arranged on the rotary shaft (5), the top end of the rack (3) is provided with the anti-reversion rod (4) above the unidirectional ratchet (10), one end of the anti-reversion rod (4) is fixedly connected or hinged with the rack (3), the lower surface of the other end of the anti-reversion rod is connected with the rack (3) through the tension spring (15), when the end of the anti-reversion rod (4) is fixedly connected with the rack (3), the anti-reversion rod (4) is of an elastic arm structure, the ratchet (16) matched with the unidirectional ratchet (10) is arranged on the lower surface of the middle part of the anti-reversion rod (4), when the tension spring (15) is in a natural state, the ratchet (16) is clamped with the unidirectional ratchet (10), the unidirectional ratchet (10) can only rotate positively, and the rotary drum (1) can only wind the lifting rope (2) to drive the lifting hook (7) to rise; when the end of the anti-reverse rod (4) provided with the tension spring (15) is lifted upwards, the ratchet (16) can be driven to be separated from the unidirectional ratchet (10), and the unidirectional ratchet (10) can rotate freely in two directions.

2. The box girder formwork lifting and hoisting device as claimed in claim 1, wherein: the rotary shaft (5) and the manual crank (6) are of an integrated structure, and are manufactured by bending deformed steel bars, and the rotary shaft (5) passes through the center of the rotary drum (1) and then is welded and fixed with the rotary drum (1) and the rotary shaft (5) at the two ends of the rotary drum (1); the rotating shaft (5) is welded and fixed with the inner ring of the bearing (9); the rotating shaft (5) is welded and fixed with the central through hole of the unidirectional ratchet wheel (10).

3. The box girder formwork lifting and hoisting device as claimed in claim 2, wherein: the hand crank (6) is provided with a crank sleeve (13) at the holding end, the crank sleeve (13) is sleeved on the hand crank (6), and a limiting piece (14) for preventing the crank sleeve (13) from falling off is arranged at the end part of the hand crank (6).

4. The box girder formwork lifting and hoisting device as claimed in claim 1, wherein: the bearing (9) is pressed and fastened at the top end of the frame (3) through the bearing gland (8) matched with the bolt.

5. The box girder formwork lifting and hoisting device as claimed in claim 1, wherein: the axial both ends of cylinder (1) are provided with terminal surface limiting plate (11) respectively, and radial extension along cylinder (1) is followed to terminal surface limiting plate (11), and the outward flange of terminal surface limiting plate (11) is protruding the setting for the outer disc of cylinder (1).

6. The box girder formwork lifting and hoisting device as claimed in any one of claims 1 to 5, wherein: the frame (3) is of a frustum-shaped frame structure, the frame (3) comprises a plurality of rectangular frame beams (31) which are vertically layered, the centers of the inner cavities of the rectangular frame beams (31) are positioned on the same vertical axis, the length and the width of rectangular distribution lines of the rectangular frame beams (31) are gradually increased from top to bottom, and four corners of the rectangular frame beams (31) are respectively connected through inclined support columns (32); the bearing (9) is fixedly arranged in the middle of two beams which are oppositely arranged in the rectangular frame beam (31) at the uppermost layer.