Multi-lifting-point portal crane
By installing the lifting mechanism on the gantry legs in the gantry crane and using the redirection pulley set, the top drive equipment on the trolley is eliminated, and the problem of height limitation in the prior art is solved, and the increase of lifting height is achieved.
Patent Information
- Application Number
- CN202422291570.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The lifting mechanism of the existing gantry crane is installed on the top of the trolley, resulting in a large space required to be reserved between the top of the workshop and the top of the trolley, which limits the lifting height and cannot be applied to places with limited height such as wind power laboratories.
The multi-lifting point gantry crane design is adopted, and the lifting mechanism is set on the ground beam of the door frame legs, and the wire rope is connected through a series of redirection pulleys and pulley sets. The drive motor, reducer and reel mechanism on the top of the car is cancelled, and the lifting function is achieved using the door frame legs and pulley sets on the car.
There is no need to reserve space on the top of the car, which increases the height of the car, thereby increasing the lifting height, suitable for places with height limitations.
Smart Images
Figure CN223213681U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gantry cranes, in particular to a multi-hoisting-point gantry crane. Background Art
[0002] Gantry crane is the most widely applicable and largest type of lifting equipment at present. Gantry crane is generally composed of gantry and trolley running mechanism, trolley and trolley running mechanism, lifting mechanism and other parts.
[0003] The lifting mechanism of existing gantry cranes is typically mounted on top of a trolley. This requires space between the workshop ceiling and the trolley roof, limiting the lifting height. However, gantry cranes with this structure are not well suited for certain locations with limited workshop height, such as wind power laboratories.
[0004] For this purpose, we designed a multi-lifting point gantry crane. Utility Model Content
[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a multi-hoisting-point gantry crane.
[0006] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:
[0007] A multi-lifting point gantry crane includes a gantry, a trolley running mechanism, a trolley, and a lifting mechanism, wherein the lifting mechanism includes:
[0008] a hoisting device, provided on the ground beam of the gantry legs;
[0009] The rope winding system has a steel wire rope which is connected to the hoisting device at one end, and the other end of the steel wire rope is passed through the first redirecting pulley at the top of the support leg on the corresponding side of the gantry, the second redirecting pulley at the corresponding end of the trolley, the first fixed pulley group and the first movable pulley group at the corresponding end of the trolley, the balancing pulley in the middle of the trolley, the second fixed pulley group and the second movable pulley group at the other section of the trolley and the third redirecting pulley at the other end of the trolley, and is fixed to the top of the support leg on the other side of the gantry.
[0010] Preferably, each trolley is connected to two lifting mechanisms, and the hoisting devices in the two lifting mechanisms are located on the ground beam of the same gantry leg or respectively on the ground beams of the two gantry legs.
[0011] Preferably, the portal crossbeam is provided with two rails arranged along its length direction at intervals along its width direction, and each rail is equipped with one of the trolleys.
[0012] Preferably, the two first movable pulley sets and the second movable pulley set are commonly connected to a sling.
[0013] Preferably, the portal frame legs are provided with zigzag ladders.
[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:
[0015] 1. Compared with the existing crane trolley, the top of the trolley does not need to be equipped with a driving motor, a reducer, a reel and other supporting reel mechanisms. Therefore, there is no need to reserve a large space between the top of the workshop and the top surface of the trolley, and the function of increasing the lifting height can be achieved by increasing the height of the trolley. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is the main view of the utility model;
[0017] Figure 2 It is a left view of the utility model;
[0018] Figure 3 This is the front view of the small and medium-sized vehicle of the utility model;
[0019] Figure 4 Schematic diagram of the rope winding system in the present invention;
[0020] Figure 5 This is a schematic diagram of a single trolley corresponding to two sets of lifting mechanisms in the present utility model;
[0021] Figure 6 This is a schematic diagram of another structure in which a single trolley corresponds to two sets of lifting mechanisms in the present invention.
[0022] In the figure: 1. Gantry; 11. Zigzag ladder; 2. Carriage running mechanism; 3. Trolley; 4. Hoisting mechanism; 41. Winch; 42. Rope winding system; 421. Wire rope; 422. First redirecting pulley; 423. Second redirecting pulley; 424. First fixed pulley group; 425. First movable pulley group; 426. Balance pulley; 427. Second fixed pulley group; 428. Second movable pulley group; 429. Third redirecting pulley; 5. Hoist. DETAILED DESCRIPTION
[0023] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right" and so on to indicate directions or positional relationships, they only correspond to the drawings of the present application and are for the convenience of describing the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "transverse", "longitudinal" and so on to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail area of the corresponding part in the length direction, and "side part" indicates the head and tail area of the corresponding part in the width direction; this is for the convenience of describing the present invention and does not indicate or imply that the device or element referred to must have a specific direction.
[0024] Example 1, combined with the attached Figure 1-2 A multi-lifting point gantry crane includes a gantry 1, a trolley running mechanism 2, a trolley 3, and a lifting mechanism 4;
[0025] In order to facilitate the maintenance of the trolley 3 and the rope winding system 42, the legs of the gantry 1 are provided with a zigzag ladder 11; that is, the staff can climb to the top of the gantry 1 via the zigzag ladder 11 to inspect the trolley 3 and the rope winding system 42.
[0026] The lifting mechanism 4 includes a hoisting device 41 and a rope winding system 42 provided on the ground beam of the gantry 1 leg;
[0027] Combined with attachment Figure 4 The rope winding system 42 has a steel wire rope 421, one end of which is connected to the hoisting device 41. The other end of the steel wire rope 421 is passed through the first redirecting pulley 422 provided at the top of the support leg on the corresponding side of the gantry 1, the second redirecting pulley 423 provided at the corresponding end of the trolley 3, the first fixed pulley group 424 and the first movable pulley group 425 provided at the corresponding end of the trolley 3, the balancing pulley 426 provided in the middle of the trolley 3, the second fixed pulley group 427 and the second movable pulley group 428 provided at the other section of the trolley 3 and the third redirecting pulley 429 provided at the other end of the trolley 3, and is fixed to the top of the support leg on the other side of the gantry 1.
[0028] In actual use, combined with the attached Figure 3 The two first movable pulley sets 425 and the second movable pulley set 428 are commonly connected to a sling 5.
[0029] During use, when the hoisting mechanism 4 needs to lift, the hoisting device 41 rotates forward to reel in the wire rope 421. Since the distances between the hoisting device 41, the first redirecting pulley 422, the second redirecting pulley 423, and the first fixed pulley set 424 do not change, and the distances between the second fixed pulley set 427, the third redirecting pulley 429, and the outer ends of the wire rope 421 do not change, the distances between the wire rope between the first fixed pulley set 424 and the first movable pulley set 425 and the wire rope between the second fixed pulley set 427 and the second movable pulley set 428 can only be reduced. Since the heights of the first fixed pulley set 424 and the second fixed pulley set 427 remain unchanged, the first movable pulley set 425 and the second movable pulley set 428 are raised, achieving the lifting function. Similarly, when the hoisting device 41 rotates in the reverse direction, the first movable pulley set 425 and the second movable pulley set 428 are lowered.
[0030] Compared with the existing crane trolley, this arrangement does not require the installation of a drive motor, reducer, reel and other supporting reel mechanisms on the top. Therefore, a large space is no longer required between the top of the workshop and the top surface of the trolley, and the function of increasing the lifting height can be achieved by increasing the height of the trolley.
[0031] Furthermore, each trolley 3 is connected to two lifting mechanisms 4, that is, it has two slings 5. Figure 5 , the hoisting devices 41 in the two lifting mechanisms 4 can be located on the ground beam of the same gantry 1 leg. Figure 6 The hoisting devices 41 in the two lifting mechanisms 4 can be respectively located on the ground beams of the two gantry legs 1.
[0032] Furthermore, combined with Figure 2 The crossbeam of the portal frame 1 is provided with two tracks arranged along its length direction at intervals along its width direction, and each track is equipped with a trolley 3, that is, there are two trolleys.
[0033] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.
Claims
1. A multi-lifting point gantry crane, comprising a gantry (1), a trolley running mechanism (2), a trolley (3), and a lifting mechanism (4), characterized in that: The lifting mechanism (4) comprises: A hoisting device (41) is provided on the ground beam of the support leg of the portal frame (1); A rope winding system (42) includes a steel wire rope (421) connected at one end to a hoisting device (41), the other end of the steel wire rope (421) sequentially winding around a first redirecting pulley (422) provided at the top of a leg on the corresponding side of the gantry (1), a second redirecting pulley (423) provided at the corresponding end of the trolley (3), a first fixed pulley group (424) and a first movable pulley group (425) provided at the corresponding end of the trolley (3), a balancing pulley (426) provided at the middle of the trolley (3), a second fixed pulley group (427) and a second movable pulley group (428) provided at the other section of the trolley (3), and a third redirecting pulley (429) provided at the other end of the trolley (3), and is fixed to the top of the leg on the other side of the gantry (1).
2. The multi-lifting point gantry crane according to claim 1, characterized in that: Each trolley (3) is connected to two lifting mechanisms (4), and the hoisting devices (41) in the two lifting mechanisms (4) are located on the ground beam of the same door frame (1) support leg or respectively on the ground beams of two door frame (1) support legs.
3. The multi-lifting point gantry crane according to claim 1, characterized in that: The crossbeam of the portal frame (1) is provided with two rails spaced apart along its width direction and arranged along its length direction, and each rail is equipped with one of the trolleys (3).
4. The multi-lifting point gantry crane according to claim 1, characterized in that: The two first movable pulley sets (425) and the second movable pulley set (428) are commonly connected to a sling (5).
5. The multi-lifting point gantry crane according to claim 1, characterized in that: The door frame (1) supporting legs are provided with a zigzag ladder (11).