CN105236276A - Foldable gantry crane capable of ascending and descending - Google Patents

Abstract

The invention discloses a liftable and foldable gantry lifting device, which belongs to the field of transport tools. A liftable and foldable gantry lifting device of the present invention comprises a beam and outriggers arranged on both sides of the beam, and the outriggers include a lifting support rod connected with the beam and a fixed leg telescopically matched with the lifting support rod , a lifting mechanism is provided between the lifting support rod and the fixed leg, the middle of the beam is cut off and hinged to each other, and the hinged part is connected and fixed through the connecting plate, and the two ends of the beam are respectively connected to the upper part of the lifting support rod through hinges; After the connecting plate is removed, the beam can be bent downwards, so that the legs on both sides of the beam are retracted inwardly. The gantry lifting device of the present invention can realize height adjustment according to needs when in use, and is simple and convenient to use; when not in use, the height of the beam can be lowered and folded to reduce the occupied space and facilitate transportation; the structure is simple, the operation is convenient, and the cost is low .

Description

A liftable and foldable gantry lifting device

technical field

The invention relates to a lifting device, in particular to a liftable and foldable gantry lifting device.

Background technique

The small and medium-sized gantry lifting device is a small lifting support platform developed according to the needs of handling equipment, warehouse import and export, lifting and maintenance of heavy equipment and material transportation in the daily production of small and medium-sized factories. It is widely used in mold manufacturing factories , auto repair factories, mines, civil construction sites and other occasions that require lifting. The use of gantry lifting devices can realize lifting mechanization, reduce manpower, reduce production and operation costs, and improve work efficiency.

The currently used gantry lifting device mainly has the following disadvantages:

(1) The height of the gantry frame is fixed, and the height cannot be adjusted according to the specific space of the construction site, which brings some inconvenience to the use;

(2) Since the height of the gantry frame is non-adjustable and has an integral structure, it takes up a lot of space during transportation, which also brings inconvenience to the transportation of the gantry type lifting device.

In order to overcome the above-mentioned shortcomings of the existing gantry-type lifting device, the Chinese patent number ZL201520098602.5, the date of authorization announcement is July 1, 2015, and the name of the invention is: a liftable gantry. Lifting gantry, including beams and brackets on both sides of the beams, each side bracket includes a fixed sleeve and a lifting frame body sleeved in the fixed sleeve, the fixed sleeve is equipped with a supporting fixed pulley at the top, and under the supporting fixed pulley There is a steel wire rope turntable, and the lifting frame body is equipped with a lifting pulley at the bottom. One end of the steel wire rope is fixed on the top of the fixed sleeve and goes around the lifting pulley downwards, and then is wound on the wire rope turntable through the supporting fixed pulley. The tops of the lifting frame bodies on both sides are connected. The brackets on both sides of the gantry in this application adopt the form of a combination of a fixed sleeve and a lifting frame body, so that the lifting frame body can move freely in the fixed sleeve, so that the height of the entire gantry frame can be adjusted, which is convenient to meet various lifting requirements. If necessary, it can also be reduced in size for easy transportation. However, in this application, it is still difficult to solve the problem that the gantry occupies a large space only by adjusting the height of the gantry. When the beam is long, it is still very inconvenient to transport; in addition, the application uses lifting pulleys and The way of fixed pulley realizes the lifting function of the gantry frame. Although it is convenient to use, the winding of the wire rope is complicated and cumbersome. The wire rope turntable can only be used for the lifting of the gantry frame and cannot be used for other purposes.

Contents of the invention

1. The technical problem to be solved by the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the existing gantry lifting device, and provide a liftable and foldable gantry lifting device. By adopting the technical solution of the present invention, the height of the gantry lifting device can be adjusted up and down, and the beam can be It can be folded, and the height can be adjusted according to the needs when in use, which is simple and convenient to use; when not in use, the height of the beam can be lowered and folded to reduce the occupied space and facilitate transportation; at the same time, the structure is simple, the operation is convenient, and the cost is low, which greatly reduces the It reduces the labor intensity of workers and meets the needs of small and medium-sized enterprises.

2. Technical solution

In order to achieve the above object, the technical scheme provided by the invention is:

A liftable and foldable gantry lifting device of the present invention comprises a crossbeam and outriggers arranged on both sides of the crossbeam, the outriggers include a lifting support rod connected with the crossbeam, Fixed legs, a lifting mechanism is provided between the lifting support rod and the fixed legs, the middle of the beam is cut off and hinged to each other, and the hinged part is connected and fixed by a connecting plate, the two ends of the beam They are respectively connected to the upper part of the lifting support rod through hinges; after the connecting plate is removed, the cross beam can be bent downward, so that the legs on both sides of the cross beam are retracted inward.

Furthermore, the middle of the crossbeam is connected by a hinge installed on the upper part of the crossbeam.

Furthermore, the beam is I-beam.

Furthermore, two ends of the crossbeam extend outward respectively, and a triangular fixing plate is connected between the extension section and the lifting support rod through bolts.

Furthermore, the lifting mechanism includes a manual winch with self-locking function, lifting lugs and pulleys, the manual winch and lifting lugs are respectively installed on both sides of the upper part of the fixed leg, and the lower part of the fixed leg There is a rope groove running through both sides of the fixed leg, the lifting support rod is sleeved in the fixed leg, the pulley is installed on the lower part of the lifting support rod, and the wire rope drawn from the manual winch goes around The back of the pulley is connected with the lifting lug; the upper part of the fixed leg is also provided with a positioning jack, and the lifting support rod is also provided with a row of spaced height adjustment holes matched with the positioning jack.

Furthermore, hooks are connected to the rope ends of the wire ropes drawn from the manual winch, the upper and lower ends of the rope groove are respectively provided with winding notches for the hooks to pass through, and the extension sections at both ends of the beam A hook hole is provided on the top, and when the wire rope in the manual winch is connected with the hook hole through the hook, the folded beam can be pulled up and stretched.

Furthermore, the bottom of the fixed leg is also equipped with castors with brake function.

3. Beneficial effect

Compared with the existing known technology, the technical solution provided by the invention has the following remarkable effects:

(1) A liftable and foldable gantry lifting device of the present invention, which includes a beam and liftable outriggers arranged on both sides of the beam. The connection is fixed, and the two ends of the beam are respectively connected to the upper part of the lifting support rod through hinges. After removing the connecting plate, the beam can be bent downward, so that the legs on both sides of the beam can be retracted inward; the height of the gantry lifting device It can be adjusted up and down, and the beam can be folded. When in use, the height can be adjusted according to the needs, which is simple and convenient to use; when not in use, the height of the beam can be lowered and folded to reduce the occupied space and facilitate transportation;

(2) In the liftable and foldable gantry lifting device of the present invention, the middle of the crossbeam is connected by a hinge installed on the top of the crossbeam, so that the crossbeam can be folded inward by 180°, which greatly reduces the gantry lifting capacity. the footprint of the device;

(3) In the liftable and foldable gantry lifting device of the present invention, two ends of the crossbeam extend outward respectively, and a triangle is fixed between the extension and the lifting support rod through bolts. plate, using the triangular fixed plate to further strengthen the structural stability of the gantry lifting device and improve the carrying capacity of the gantry lifting device;

(4) A liftable and foldable gantry lifting device of the present invention, its lifting mechanism includes a manual winch with self-locking function, lifting lugs and pulleys, and the manual winch and lifting lugs are respectively installed on the upper two sides of the fixed leg. On the side, the lower part of the fixed leg is provided with a rope groove that runs through both sides of the fixed leg. The lifting support rod is sleeved in the fixed leg, and the pulley is installed on the lower part of the lifting support rod. Connected with the lifting lug, the upper part of the fixed leg is also provided with a positioning jack, and a row of spaced height adjustment holes matched with the positioning jack is provided on the lifting support rod; the lifting mechanism is realized by a manual winch, and the wire rope The winding is simple, the operation is convenient, and the height of the gantry lifting device can be adjusted in multiple stages to meet the needs of different occasions;

(5) A liftable and foldable gantry lifting device of the present invention, the rope end of the steel wire rope drawn from the manual winch is connected with a hook, and the upper and lower ends of the rope groove are respectively provided with winding ropes for the hook to pass through. Notch, there are hook holes on the extensions at both ends of the beam. When the wire rope in the manual winch is connected to the hook hole through the hook, the folded beam can be pulled up and opened. It can also assist in the folding or unfolding of the gantry lifting device, which reduces the labor intensity of manual height adjustment and gantry folding or unfolding;

(6) In the liftable and foldable gantry lifting device of the present invention, the bottom of the fixed leg is also provided with casters with braking function, so that the gantry lifting device has the dual functions of lifting and transferring heavy objects, which is very convenient. It greatly reduces the labor intensity of workers and meets the needs of small and medium-sized enterprises;

(7) A liftable and foldable gantry lifting device of the present invention has simple structure, convenient operation, low cost, economical and practical, and is convenient for transportation.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a liftable and foldable gantry lifting device of the present invention;

Fig. 2 is the structural representation of fixed leg among the present invention;

Fig. 3 is the structural representation of lifting support bar and crossbeam among the present invention;

FIG. 4 is a schematic diagram of a partially enlarged structure at K in FIG. 3 .

Explanation of the labels in the schematic diagram:

1. Fixed leg; 11. Rope groove; 12. Rope winding gap; 13. Positioning jack; 2. Lifting support rod; 21. Height adjustment hole; 22. Opening; 23. Pulley; 3. Beam; 31. Closure Page; 32, connecting plate; 33, hook hole; 4, hinge; 5, triangle fixing plate; 6, manual winch; 7, lifting lug; 8, caster.

detailed description

In order to further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figure 1, Figure 2 and Figure 3, a liftable and foldable gantry lifting device in this embodiment has the functions of lifting and folding, and it includes a beam 3 and legs arranged on both sides of the beam 3, The supporting legs include a lifting support rod 2 connected to the crossbeam 3, a fixed supporting leg 1 telescopically matched with the lifting supporting rod 2, a lifting mechanism is arranged between the lifting supporting rod 2 and the fixed supporting leg 1, and the two sides of the fixed supporting leg 1 There are diagonal braces on the side, which are welded into a triangular stable structure; the above-mentioned lifting mechanism includes a manual winch 6 with self-locking function, lifting lug 7 and pulley 23, and the manual winch 6 and lifting lug 7 are installed on the upper two sides of the fixed leg 1 respectively. side, wherein the manual winch 6 is installed on the outside of the fixed leg 1 through the winch seat, the lifting lug 7 is welded on the inner side of the fixed leg 1, and the lower part of the fixed leg 1 is provided with a rope groove running through the inner and outer sides of the fixed leg 1 11. The lifting support rod 2 is sleeved in the fixed leg 1. In this embodiment, the fixed leg 1 and the lifting support rod 2 are made of square hollow steel pipes. The pulley 23 is installed on the lower part of the lifting support rod 2. Manually The wire rope drawn in the winch 6 is connected with the lifting lug 7 after going around the pulley 23, like this, when the manual winch 6 is rotated to tighten the wire rope, the wire rope pushes up the lifting support rod 2 so that the height of the lifting support rod 2 is raised, and Steel wire rope transitions through pulley 23, has reduced frictional noise, and manual winch 6 has self-locking function, is easy to operate; A row of matched height adjustment holes 21 (see Fig. 3 ) distributed at intervals, when the cross beam 3 is adjusted to a suitable height, insert the pin or bolt into the positioning socket 13 and the height adjustment hole 21 to fix the cross beam 3 Height, the manual winch 6 is adopted in the present embodiment to realize the lifting of the gantry lifting device, the winding of the wire rope is simple, the operation is convenient, and the height of the gantry lifting device can be adjusted in multiple stages, which meets the needs of different occasions. The middle of the crossbeam 3 in this embodiment is cut off and hinged together, and the hinged part is connected and fixed by the connecting plate 32. I-shaped steel is used, and the connecting plate 32 is connected with the beam 3 by bolts, and the connecting plate 32 is arranged on both sides of the middle plate of the I-shaped steel. After the connecting plate 32 is removed, the beam 3 can be bent downward, so that the two sides of the beam 3 The outriggers are retracted inward, and the middle of the crossbeam 3 is connected by the hinge 31 installed on the top of the crossbeam 3, so that the crossbeam 3 can be folded inward by 180°, which greatly reduces the footprint of the gantry lifting device.

As shown in Fig. 1 and Fig. 3, the two ends of the crossbeam 3 in this embodiment extend outward respectively, and a triangular fixing plate 5 is connected between the extension section and the lifting support rod 2 by bolts. The triangular fixing plate 5 has ribs, and when the beam 3 is folded, the connecting screws between the triangular fixing plate 5 and the beam 3 can be removed, and the triangular fixing plate 5 is used to further strengthen the structural stability of the gantry lifting device in use. The carrying capacity of the gantry lifting device is improved. The rope end of the wire rope drawn in the manual winch 6 is connected with a hook (not shown in the figure), and the upper and lower ends of the rope groove 11 are respectively provided with a rope winding gap 12 (as shown in Figure 2 ) for making the hook pass. 3. The extension section at both ends is provided with a hook hole 33, which can be a hole directly opened on the extension section, or a lifting lug welded on the lower side of the extension section. The wire rope in the manual winch 6 passes through the hook and the hook. When the hole 33 is connected, the folded crossbeam 3 can be pulled up and stretched to realize the deployment of the crossbeam 3; The opening 22 corresponding to the rope notch 12 can facilitate hooks and wire ropes to go around like this, so as to realize different usage modes of the manual winch 6 . In this embodiment, the manual winch 6 is used in one machine, which can not only realize the lifting of the gantry lifting device, but also assist in the folding or unfolding of the gantry lifting device, which reduces the labor of manually adjusting the height and folding or unfolding the gantry. Labor intensity. In addition, the bottom of the fixed leg 1 is also equipped with a caster 8 with a brake function, so that the gantry lifting device has the dual functions of lifting and transferring heavy objects, which greatly reduces the labor intensity of workers and meets the needs of small and medium-sized enterprises. .

The height of the liftable and foldable gantry lifting device of this embodiment can be adjusted up and down, and the crossbeam can be folded. When in use, the height can be adjusted according to the needs, and the use is simple and convenient; the height of the crossbeam can be lowered when not in use. And it can be folded up to reduce the occupied space and facilitate transportation. The following is a brief description of the use process of a liftable and foldable gantry lifting device of this embodiment in conjunction with the accompanying drawings:

During use, a tackle and a hoisting block are installed on the beam 3 . Hook the hooks of the manual winches 6 on both sides of the legs to the hook holes 33 on the extensions at both ends of the crossbeam 3, and simultaneously turn the manual winches 6 on both sides to tighten the wire rope and drive the folded crossbeam 3 to rotate around the hinge 4 until The crossbeam 3 is unfolded to a horizontal position, and under the self-locking function of the manual winch 6, the manual winch 6 is released without worrying about the collapse of the crossbeam 3; The bolts are fixed, and the expansion of the beam 3 is completed. According to the use requirements of the construction site, the hooks of the manual winches 6 on the legs on both sides are bypassed from the bottom of the pulley 23 and hooked upwards to the lifting lug 7 welded on the fixed leg 1. The wire rope goes around the pulley 23 and rotates the manual The winch 6 tightens the wire rope, so that the beam 3 is lifted up. Under the action of the self-locking function of the manual winch 6, there is no need to worry that the beam 3 will fall back when the manual winch 6 is released; after reaching a suitable height, insert the latch or bolt for positioning Insertion hole 13 and corresponding height adjustment hole 21, thereby the height of crossbeam 3 is fixed.

The liftable and foldable gantry lifting device of the present invention has the advantages of simple structure, convenient operation, low cost, economical and practical, and convenient transportation. When in use, the height can be adjusted according to the needs, which is simple and convenient to use; when not in use, the height of the beam can be lowered and folded to reduce the occupied space and facilitate transportation; the use of the gantry lifting device greatly reduces the labor intensity of workers, It meets the needs of small and medium-sized enterprises.

The present invention and its implementations have been schematically described above, and the description is not restrictive. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of the present invention .

Claims (7)

1. A liftable and foldable gantry lifting device, comprising a crossbeam (3) and legs arranged on both sides of the crossbeam (3), said legs comprising lifting support rods connected to the crossbeam (3) (2), the fixed leg (1) telescopically matched with the lifting support rod (2), a lifting mechanism is provided between the lifting support rod (2) and the fixed leg (1), it is characterized in that: the The middle of the crossbeam (3) is cut off and hinged together, and the hinged part is connected and fixed through the connecting plate (32), and the two ends of the crossbeam (3) are respectively connected by the joints of the hinge (4) and the lifting support rod (2). The upper parts are connected; after the connecting plate (32) is removed, the crossbeam (3) can be bent downward, so that the legs on both sides of the crossbeam (3) are retracted inwardly. 2. A liftable and foldable gantry lifting device according to claim 1, characterized in that: the middle of the beam (3) is connected by a hinge (31) installed on the upper part of the beam (3). connect. 3. A liftable and foldable gantry lifting device according to claim 2, characterized in that: said beam (3) is I-beam. 4. A liftable and foldable gantry lifting device according to claim 1, 2 or 3, characterized in that: the two ends of the crossbeam (3) respectively extend out an extension section, and A triangular fixing plate (5) is also connected by bolts between the extension section and the lifting support rod (2). 5. A liftable and foldable gantry lifting device according to claim 4, characterized in that: said lifting mechanism includes a manual winch (6) with self-locking function, lifting lugs (7) and pulleys (23), the manual winch (6) and lifting lug (7) are respectively installed on both sides of the upper part of the fixed leg (1), and the lower part of the fixed leg (1) is provided with a penetrating fixed leg (1) Rope grooves (11) on both sides, the lifting support rod (2) is sleeved in the fixed leg (1), the pulley (23) is installed on the lower part of the lifting support rod (2), The wire rope drawn from the manual winch (6) is connected to the lifting lug (7) after bypassing the pulley (23); the upper part of the fixed leg (1) is also provided with a positioning jack (13), so that The lifting support rod (2) is also provided with a row of spaced height adjustment holes (21) matched with the positioning socket (13). 6. A liftable and foldable gantry lifting device according to claim 5, characterized in that: a hook is connected to the rope end of the wire rope drawn out of the manual winch (6), and the rope groove The upper and lower ends of (11) are respectively provided with the rope winding gap (12) that is used to make the hook pass through, and the extension at the two ends of the crossbeam (3) is provided with a hook hole (33), and the manual winch (6 ) when the wire rope in the hook is connected with the hook hole (33), the folded crossbeam (3) can be pulled up and strutted. 7. A liftable and foldable gantry lifting device according to claim 6, characterized in that: the bottom of the fixed leg (1) is also provided with casters (8) with a braking function.