CN213679516U - Gantry hoisting device with adjustable height - Google Patents

Abstract

The utility model discloses a gantry hoisting device with adjustable height, which comprises a girder, a stand column assembly and a height adjusting assembly, wherein the stand column assembly comprises a lower bracket and an upper stand column which is arranged on the lower bracket and extends vertically upwards; the height adjusting assembly is arranged on the lower support and connected with the lower end of the upper stand column, the height adjusting assembly is provided with a first state and a second state, the height adjusting assembly in the first state can drive the upper stand column to move upwards in a single direction in the vertical direction relative to the lower support, and the height adjusting assembly in the second state can drive the upper stand column to move downwards in a single direction in a single segmentation mode in the vertical direction relative to the lower support, so that the height of the main beam is adjusted. The utility model discloses a height-adjustable longmen hoisting accessory through switching between height adjusting subassembly's the first state and the second state, realizes the quick rise and the steady decline of segmentation of stand, effectively improves regulation stability and factor of safety.

Description

Gantry hoisting device with adjustable height

Technical Field

The utility model belongs to the technical field of hoisting machinery equipment, especially, relate to a height-adjustable longmen hoisting accessory.

Background

The hoisting support is a part of hoisting operation mechanical equipment, is widely applied to industrial production of various industries, and can use different types of hoisting supports under different working environments. In the use, in order to adapt to different work heights, often need to adjust the height of lifting support. The existing hoisting support is mostly divided into an upper upright post and a lower upright post, an adjusting hole is formed in the upper upright post, and the relative position between the upper upright post and the lower upright post is fixed through a locking piece, so that the height of the hoisting support is adjusted. However, when the height of the existing lifting support is adjusted, the position between the upper stand column and the lower stand column can be adjusted only by applying force by at least two persons at the same time, the labor intensity is high, the adjusting efficiency is low, when the locking piece is loosened, the upper stand column can easily and rapidly slide downwards, the height adjustment is unstable, potential safety hazards exist, and even irreversible consequences can be caused. Therefore, a technical solution is needed to solve the above problems.

The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a height-adjustable longmen hoisting accessory effectively promotes height-adjusting's stability, guarantees operation safety, improves work efficiency.

In order to achieve the above object, the utility model provides a height-adjustable gantry crane, which is characterized in that, the height-adjustable gantry crane comprises a main beam, a column assembly and a height adjusting assembly, the column assembly comprises a lower bracket and an upper column which is arranged on the lower bracket and extends vertically and upwardly, a connecting piece is arranged at the top of the lower bracket, a chute is arranged in the connecting piece, the upper column is connected with the connecting piece in a sliding way through the chute, the upper end of the upper column is connected with the end part of the main beam, and the two column assemblies respectively support two ends of the main beam; the height adjusting assembly is arranged on the lower support and connected with the lower end of the upper upright post, the height adjusting assembly is provided with a first state and a second state, the height adjusting assembly in the first state can drive the upper upright post to perform unidirectional ascending motion along the vertical direction relative to the lower support, and the height adjusting assembly in the second state can drive the upper upright post to perform unidirectional subsection descending motion along the vertical direction relative to the lower support, so that the height of the main beam is adjusted.

In one example, the height adjusting assembly comprises a mounting seat, a ratchet wheel shaft, a ratchet wheel, a first stopping piece, a handle and a second stopping piece, wherein the mounting seat is fixedly arranged on the lower bracket, the ratchet wheel shaft is rotatably arranged on the mounting seat and is in transmission connection with the lower end of the upper upright post, the ratchet wheel is fixedly arranged on the ratchet wheel shaft, the first stopping piece is arranged on the mounting seat and is next to the ratchet wheel, the first stopping piece can contact the ratchet wheel and only allows the ratchet wheel to rotate in the ascending direction, and the two first stopping pieces are arranged at intervals of a plurality of gear teeth in the rotating direction of the ratchet wheel; the handle is connected with the ratchet shaft and can rotate around the ratchet shaft, a driving part is arranged at the connecting end of the handle and the ratchet shaft, and the driving part can be driven by the rotation of the handle to sequentially push the two first stop pieces away from the ratchet; the second stop piece is arranged on the handle and is close to the ratchet wheel, the second stop piece can contact the ratchet wheel and only allows the ratchet wheel to rotate along the ascending direction, one side of the second stop piece, which is far away from the ratchet wheel, is provided with a pulling part, and the pulling part can be operated to drive the second stop piece to be close to or far away from the ratchet wheel, so that the height adjusting assembly is switched to the first state or the second state.

In one example, the ratchet shaft penetrates through the mounting seat, the two ratchets are symmetrically arranged on two outer sides of the mounting seat and sleeved on the ratchet shaft, and the end part of the handle is sleeved on two ends of the ratchet shaft and positioned on the outer sides of the two ratchets; and/or, the height adjusting assembly further comprises a transmission belt, one end of the transmission belt is connected with the ratchet shaft on the inner side of the mounting seat, the other end of the transmission belt is connected with the lower end of the upper upright post, and the ratchet shaft rotates to be capable of rolling or unreeling the transmission belt, so that the upper upright post is driven to move up and down.

In one example, the height adjusting assembly further comprises a first elastic piece, the first stopping piece is a clamping plate which is arranged on the mounting seat in a sliding mode, and one side of the clamping plate can be clamped into a tooth groove of the ratchet wheel; the first elastic piece is arranged between one side, away from the ratchet, of the clamping plate and the mounting seat and can generate force towards the ratchet to the clamping plate.

In one example, the driving portion of the handle is a flange, and a front side of the flange in a rotation ascending direction of the ratchet wheel is an arc-shaped side, and a rear side of the flange is a bevel side, so that the flange can sequentially push open the two first stoppers to rotate the ratchet wheel tooth by tooth.

In one example, the height adjustment assembly further comprises a second elastic member, the second stopper is slidably disposed on the handle, and the second elastic member is disposed between a side of the second stopper facing away from the ratchet and the handle and is capable of generating a force to the second stopper toward the ratchet.

In one example, the height-adjustable gantry crane further comprises a wheel traveling assembly, wherein the wheel traveling assembly is arranged at the bottom of the lower support and can be used for supporting and moving the height-adjustable gantry crane.

In one example, the height-adjustable gantry hoisting device further comprises an adjusting support leg assembly, the adjusting support leg assembly comprises an installation shell and support legs, the installation shell is fixedly arranged on one side of the bottom of the lower support, the support legs are sleeved on the installation shell and extend out of the bottom of the installation shell, and the length of the support legs extending out of the installation shell can be adjusted so as to adjust the relative height of the bottoms of the support legs and the bottoms of the walking wheel assemblies in the vertical direction.

In one example, the height-adjustable gantry hoisting device further comprises a locking assembly, wherein the locking assembly is arranged on one side of the lower support and can be abutted against the upper stand column so as to lock and reinforce the position of the upper stand column relative to the lower support.

Through the utility model provides a height-adjustable longmen hoisting accessory can bring following beneficial effect:

1. the vertical column assembly is divided into the lower support and the upper vertical column, so that the height of the lifting device can be changed by changing the relative position between the upper vertical column and the lower support, the lifting device is suitable for lifting operation under different conditions, the application range is wider, and the adaptability is stronger; the relative position between the upper stand column and the lower support can be stably adjusted by arranging the height adjusting assembly, the height adjusting assembly can drive the upper stand column to ascend fast in a single direction in a first state, manual lifting is not needed, the labor intensity is effectively reduced, and the height adjusting efficiency is improved; the height adjusting assembly can drive the upper stand column to descend in a one-way sectional mode under the second state, the upper stand column is effectively prevented from falling down rapidly due to dead weight, height adjustment is stable, the upper stand column is prevented from falling and being damaged, the service life is effectively prolonged, potential safety hazards are eliminated, safety factors are improved, operation safety is guaranteed, practicability is high, and the wide market prospect is achieved.

2. The height adjusting assembly can be fixedly arranged on one side of the lower support through the arrangement of the mounting seat, so that the height adjusting assembly is prevented from deviating in the adjusting process, the adjusting stability is effectively improved, and the safety performance is improved; when the height adjusting assembly is in a first state, the second stop piece is in close contact with the ratchet wheel, the handle can drive the second stop piece to freely rotate clockwise (anticlockwise) relative to the ratchet wheel, and when the handle drives the second stop piece to rotate anticlockwise (clockwise), the handle can drive the ratchet wheel to synchronously rotate anticlockwise (clockwise), so that the ratchet wheel drives the ratchet wheel shaft to drive the upper upright post to vertically move upwards; the pulling part is arranged to drive the second stop piece to be far away from the ratchet wheel so as to switch the height adjusting assembly to a second state, so that the handle cannot drive the ratchet wheel to synchronously rotate when rotating anticlockwise (clockwise); the rotation direction of the ratchet wheel can be limited by arranging the two first stop pieces, so that the ratchet wheel can only rotate anticlockwise (clockwise), and when the height adjusting assembly is in the second state, after the driving part jacks one first stop piece, the other first stop piece can still limit the ratchet wheel, so that the upper stand column is prevented from rapidly descending due to free rotation of the ratchet wheel after the first stop piece is jacked, the use stability is effectively improved, and the safety factor is improved; can push up two first stoppers in proper order through setting up the drive division for the ratchet can be segmented and accomplish the alternative of a tooth position when altitude mixture control subassembly 3 is in the second state, thereby realizes the segmentation decline of stand, effectively improves the stability of declining, improves factor of safety, and altitude mixture control is stable safety, and the practicality is strong.

3. The two ratchet wheels are symmetrically arranged on the two sides of the ratchet shaft, so that the ratchet wheels on the two sides can be stressed simultaneously, the bearing capacity is stronger, the operation stability is effectively improved, the ratchet wheel abrasion is reduced, and the service life is effectively prolonged; the upper stand column can be driven to do lifting motion through the winding or unwinding transmission belt, the structure is simple, and the use is convenient.

4. Can push up first retainer card through setting up first elastic component and go into in the tooth's socket of ratchet to can make first retainer reset fast after first retainer is backed up by the drive division, keep first retainer and ratchet in close contact with, guarantee that first retainer can block into the tooth's socket of ratchet rapidly, avoid the ratchet free rotation, effectively promote regulation stability, improve factor of safety.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a front view of a gantry crane with an adjustable height according to an embodiment of the present invention;

fig. 2 is a left side view of a gantry crane with an adjustable height provided by the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a height adjustment assembly according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a handle and a second stopper assembly according to an embodiment of the present invention;

FIG. 5 is a top view of a handle and second retainer assembly provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural view of a mounting seat and a first stopper assembly according to an embodiment of the present invention.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the description of the terms "an aspect," "some aspects," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.

As shown in fig. 1 to 4, an embodiment of the present invention provides a height-adjustable gantry crane 100, the height-adjustable gantry crane 100 includes a main beam 1, a column assembly 2 and a height adjusting assembly 3, the column assembly 2 includes a lower bracket 21 and an upper column 22 disposed on the lower bracket 21 and extending vertically and upwardly, an upper end of the upper column 22 is connected to an end of the main beam 1, and the two column assemblies 2 respectively support two ends of the main beam 1; the height adjusting assembly 3 is arranged on the lower support 21 and connected with the lower end of the upper upright post 22, the height adjusting assembly 3 has a first state and a second state, the height adjusting assembly 3 in the first state can drive the upper upright post 22 to move upwards in a single direction in the vertical direction relative to the lower support 21, and the height adjusting assembly 3 in the second state can drive the upper upright post 22 to move downwards in a single direction in a segmented mode in the vertical direction relative to the lower support 21, so that the height of the main beam 1 is adjusted. By dividing the upright post assembly 2 into the lower bracket 21 and the upper upright post 22, the height of the hoisting device can be changed by changing the relative position between the upper upright post 22 and the lower bracket 21, so that the hoisting device is suitable for hoisting operation under different conditions, and has wider application range and stronger adaptability; the relative position between the upper stand column 22 and the lower support 21 can be stably adjusted by arranging the height adjusting assembly 3, the height adjusting assembly 3 can drive the upper stand column 22 to ascend fast in a single direction in a first state, manual lifting is not needed, the labor intensity is effectively reduced, and the height adjusting efficiency is improved; height adjusting assembly 3 can drive the one-way sectional type of stand 22 and descend under the second state, effectively avoids last stand 22 because of the dead weight falls down fast, and height adjusting is stable, avoids last stand 22 to drop the damage, and effective increase of service life eliminates the potential safety hazard, improves factor of safety, guarantees to operate safely, and the practicality is strong, has wide market prospect.

In a specific embodiment, the top of lower carriage 21 is provided with trapezoidal connecting piece, is provided with the spout in the trapezoidal connecting piece, and last stand 22 passes through spout and trapezoidal connecting piece sliding connection, and the spout can lead spacing for the elevating movement of lower carriage 21 to last stand 22, and the motion is more steady, and difficult skew direction of motion adjusts the height stability, and the practicality is strong.

Specifically, the height adjusting assembly 3 comprises a mounting seat 31, a ratchet shaft 32, a ratchet wheel 33, a first stopping piece 34, a handle 35 and a second stopping piece 36, wherein the mounting seat 31 is fixedly arranged on the lower bracket 21, the ratchet shaft 32 is rotatably arranged on the mounting seat 31 and is in transmission connection with the lower end of the upper upright post 22, the ratchet wheel 33 is fixedly arranged on the ratchet shaft 32, the first stopping piece 34 is arranged on the mounting seat 31 and is next to the ratchet wheel 33, the first stopping piece 34 can contact the ratchet wheel 33 and only allows the ratchet wheel 33 to rotate in the ascending direction, and the two first stopping pieces 34 are arranged at intervals of a plurality of teeth in the rotating direction of the ratchet wheel 33; the handle 35 is connected with the ratchet shaft 32 and can rotate around the ratchet shaft 32, a driving part 351 is arranged at the connecting end of the handle 35 and the ratchet shaft 32, and the driving part 351 can be driven by the rotation of the handle 35 to sequentially lift the two first stopping pieces 34 away from the ratchet 33; the second stopping member 36 is disposed on the handle 35 and adjacent to the ratchet wheel 33, the second stopping member 36 can contact the ratchet wheel 33 and only allow the ratchet wheel 33 to rotate in the ascending direction, and a pulling portion 361 is disposed on a side of the second stopping member 36 away from the ratchet wheel 33, and the pulling portion 361 can be operated to drive the second stopping member 36 to approach or separate from the ratchet wheel 33, so as to switch the height adjusting assembly 3 to the first state or the second state. The height adjusting assembly 3 can be fixedly arranged on one side of the lower bracket 21 by arranging the mounting seat 31, so that the height adjusting assembly 3 is prevented from deviating in the adjusting process, the adjusting stability is effectively improved, and the safety performance is improved; (ii) a When the height adjusting assembly 3 is in the first state, the second stop piece 36 is in close contact with the ratchet wheel 33, the handle 35 can drive the second stop piece 36 to freely rotate clockwise (anticlockwise) relative to the ratchet wheel 33, when the handle 35 drives the second stop piece 36 to rotate anticlockwise (clockwise), the second stop piece 36 can drive the ratchet wheel 33 to synchronously rotate anticlockwise (clockwise), the ratchet wheel 33 drives the ratchet shaft 32 to synchronously rotate anticlockwise (clockwise), and the ratchet shaft 32 drives the upper upright column 22 to vertically move upwards; the pulling part 361 is arranged to drive the second stopping piece 36 to be far away from the ratchet wheel 33, so as to switch the height adjusting assembly 3 to the second state, and the second stopping piece 36 does not drive the ratchet wheel 33 to synchronously rotate when the handle 35 rotates anticlockwise (clockwise); the rotation direction of the ratchet wheel 33 can be limited by arranging the two first stop pieces 34, so that the ratchet wheel 33 can only rotate in the counterclockwise (clockwise) direction, and when the height adjusting assembly 3 is in the second state, after the driving part 351 jacks one first stop piece 34, the other first stop piece 34 can still limit the ratchet wheel 33, and after the first stop piece 34 is jacked, the ratchet wheel 33 freely rotates to enable the upper upright post 22 to rapidly descend, so that the use stability is effectively improved, and the safety factor is improved; can push up two first retainer 34 in proper order through setting up drive division 351 for the ratchet 33 can be segmented and accomplish the alternative of a tooth position when altitude mixture control subassembly 3 is in the second state, thereby realizes the segmentation decline of last stand 22, effectively improves descending stability, improves factor of safety, and altitude mixture control is stable safety, and the practicality is strong.

When the height adjusting assembly 3 is in the first state, the first stop piece 34 and the second stop piece 36 can limit the movement of the ratchet wheel 33, and even if the two first stop pieces 34 are simultaneously pushed open by the driving part 351, the movement of the ratchet wheel 33 can be limited by the second stop piece 36, so that the safety is further improved.

In one embodiment, the upper first stop 34 abuts closely against the limit end of the gear tooth of the ratchet 33, and the lower first stop 34 is away from the limit end of the gear tooth of the ratchet 33 and close to the guide end of the adjacent gear tooth, so that the ratchet 33 can rotate clockwise by half the gear tooth position when the upper first stop 34 is pushed open and is limited by the lower stop 34, and the ratchet 33 continues to rotate clockwise to complete the movement of the latter half gear tooth position when the lower first stop 34 is pushed open.

Specifically, the ratchet shaft 32 penetrates through the mounting seat 31, the two ratchets 33 are symmetrically arranged on two outer sides of the mounting seat 31 and sleeved on the ratchet shaft 32, and the end of the handle 35 is sleeved on two ends of the ratchet shaft 32 and located on the outer sides of the two ratchets 33; and/or, the height adjusting assembly 3 further comprises a transmission belt 37, one end of the transmission belt 37 is connected with the ratchet shaft 32 inside the mounting seat 31, the other end of the transmission belt 37 is connected with the lower end of the upper upright post 22, and the ratchet shaft 32 rotates to wind or unwind the transmission belt 37, so that the upper upright post 22 is driven to move up and down. The two ratchet wheels 33 are symmetrically arranged on the two sides of the ratchet shaft 32, so that the ratchet wheels 33 on the two sides can be stressed simultaneously, the stress is uniform, the bearing capacity is stronger, the operation stability is effectively improved, the abrasion of the ratchet wheels 33 is reduced, and the service life is effectively prolonged; the upper upright post 22 can be driven to do lifting motion through the rolling or unreeling transmission belt 37, the structure is simple, and the use is convenient.

In one embodiment, the belt 37 may be a drive chain.

Specifically, the height adjusting assembly 3 further includes a first elastic member 38, the first stopper 34 is a clamping plate slidably disposed on the mounting seat 31, and one side of the clamping plate can be clamped into a tooth slot of the ratchet wheel 33; the first elastic member 38 is disposed between the side of the card board away from the ratchet wheel 33 and the mounting seat 31, and is capable of generating a force toward the ratchet wheel 33 to the card board. The first elastic piece 38 is arranged to push the first stop piece 34 to be clamped into the tooth grooves of the ratchet wheel 33, the first stop piece 34 can be reset quickly after the first stop piece 34 is pushed open by the driving portion 351, the first stop piece 34 is kept in close contact with the ratchet wheel 33, the first stop piece 34 can be clamped into the tooth grooves of the ratchet wheel 33 quickly, free rotation of the ratchet wheel 33 is avoided, adjustment stability is effectively improved, and safety factors are improved.

Specifically, the driving portion 351 of the handle 35 is a flange, and the front side of the flange in the rotation ascending direction of the ratchet wheel 33 is an arc-shaped side, and the rear side thereof is a bevel side, so that the flange can sequentially push the two first stoppers 34 open to rotate the ratchet wheel 33 tooth by tooth. The flange integrated with the handle 35 is arranged, so that the structural strength is effectively improved, the breakage is avoided, and the service life is effectively prolonged; the front side of the flange in the ascending direction is set to be an arc-shaped edge, so that the friction force when the flange is contacted with the two first stop pieces 34 can be reduced, the equipment abrasion is reduced, the external force required to be applied during operation is reduced, and the labor intensity is effectively reduced; set up to the hypotenuse through the rear side with flange rising direction, can dodge first retainer 34 at the in-process of clockwise (anticlockwise) rotation handle to realize the flange and push up two first retainer 34 from ratchet 33 in proper order, effectively avoid descending in-process maloperation, guarantee to descend the safety and stability, the practicality is strong.

Specifically, the height adjusting assembly 3 further includes a second elastic member 39, the second stopper 36 is slidably disposed on the handle 35, and the second elastic member 39 is disposed between a side of the second stopper 36 facing away from the ratchet wheel 33 and the handle 35 and is capable of generating a force to the second stopper 36 toward the ratchet wheel 33. The second stop piece 36 away from the ratchet wheel 33 can be reset through the second elastic piece 39, so that the second stop piece is abutted against the ratchet wheel 33, manual reset is not needed, time and labor are saved, the second stop piece 36 is kept in close contact with the ratchet wheel 33, the tooth groove of the ratchet wheel 33, which is disengaged from the second stop piece 36 in the process of driving the ratchet wheel 33, is avoided, the adjustment safety and stability are ensured, and the safety factor is improved.

Specifically, the height-adjustable gantry crane 100 further comprises a traveling wheel assembly 4, wherein the traveling wheel assembly 4 is arranged at the bottom of the lower support 21, and the height-adjustable gantry crane 100 can be supported and moved by the traveling wheel assembly 4. The position of the gantry lifting device 100 with the adjustable height can be quickly transferred by arranging the walking wheel assembly 4, so that the lifting operation at different positions is realized, manual carrying is not needed, the operation is simple and convenient, the labor intensity is effectively reduced, the working efficiency is improved, the actual use requirement is fully met, the application range is wide, and the practicability is high.

Specifically, the height-adjustable gantry hoisting device 100 further comprises an adjusting leg assembly 5, the adjusting leg assembly 5 comprises a mounting shell 51 and legs 52, the mounting shell 51 is fixedly arranged on one side of the bottom of the lower support 21, the legs 52 are sleeved on the mounting shell 51 and extend out from the bottom of the mounting shell 51, and the length of the legs 52 extending out of the mounting shell 51 can be adjusted, so that the relative height of the bottoms of the legs 52 and the bottom of the traveling wheel assembly 4 in the vertical direction can be adjusted. The adjusting support leg assembly 5 can be stably installed on one side of the bottom of the lower support 21 through the installation shell 51, the walking wheel assembly 4 can be far away from the ground through adjusting the extending length of the support legs 52 relative to the installation shell 51, and further the switching between the support legs 52 and the walking wheel assembly 4 can be realized, so that the mounting and dismounting are not needed, the use is convenient and fast, the operation is simple and convenient, the adjustability is strong, and the working efficiency is effectively improved; the height-adjustable gantry hoisting device 100 is supported by the support legs 52, the contact area between the support legs 52 and the ground is larger, the height-adjustable gantry hoisting device 100 is stable and reliable in standing, the situation that the position of the travelling wheel assembly 4 deviates in the working process is avoided, the working stability is effectively improved, the safety factor is improved, and the practicability is high.

Specifically, the height-adjustable gantry crane 100 further includes a locking assembly 6, and the locking assembly 6 is disposed at one side of the lower bracket 21 and can abut against the upper column 22 to lock and reinforce the position of the upper column 22 relative to the lower bracket 21. Through setting up locking Assembly 6 and can fix the relative position of upper column 22 and lower carriage 21 to reduce the pressure that drive belt 37 receives, avoid drive belt 37 fracture to appear, effective increase of service life effectively improves positioning stability.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. The height-adjustable gantry hoisting device is characterized by comprising a main beam, an upright post assembly and a height adjusting assembly, wherein the upright post assembly comprises a lower support and an upper upright post which is arranged on the lower support and vertically extends upwards, a connecting piece is arranged at the top of the lower support, a sliding groove is formed in the connecting piece, the upper upright post is slidably connected with the connecting piece through the sliding groove, the upper end of the upper upright post is connected with the end part of the main beam, and the two upright post assemblies respectively support two ends of the main beam; the height adjusting assembly is arranged on the lower support and connected with the lower end of the upper upright post, the height adjusting assembly is provided with a first state and a second state, the height adjusting assembly in the first state can drive the upper upright post to perform unidirectional ascending motion along the vertical direction relative to the lower support, and the height adjusting assembly in the second state can drive the upper upright post to perform unidirectional subsection descending motion along the vertical direction relative to the lower support, so that the height of the main beam is adjusted.

2. A gantry crane with adjustable height as claimed in claim 1, wherein said height adjusting assembly comprises a mounting base, a ratchet shaft, a ratchet wheel, a first stop member, a handle and a second stop member, said mounting base is fixedly arranged on said lower bracket, said ratchet shaft is rotatably arranged on said mounting base and is in transmission connection with the lower end of said upper column, said ratchet wheel is fixedly arranged on said ratchet shaft, said first stop member is arranged on said mounting base and is adjacent to said ratchet wheel, said first stop member can contact said ratchet wheel and only allows said ratchet wheel to rotate in the ascending direction, and two first stop members are arranged at intervals of a plurality of teeth along the rotation direction of said ratchet wheel;

the handle is connected with the ratchet shaft and can rotate around the ratchet shaft, a driving part is arranged at the connecting end of the handle and the ratchet shaft, and the driving part can be driven by the rotation of the handle to sequentially push the two first stop pieces away from the ratchet;

the second stop piece is arranged on the handle and is close to the ratchet wheel, the second stop piece can contact the ratchet wheel and only allows the ratchet wheel to rotate along the ascending direction, one side of the second stop piece, which is far away from the ratchet wheel, is provided with a pulling part, and the pulling part can be operated to drive the second stop piece to be close to or far away from the ratchet wheel, so that the height adjusting assembly is switched to the first state or the second state.

3. A gantry crane with adjustable height as claimed in claim 2, wherein the ratchet shafts are disposed through the mounting base, the two ratchet wheels are symmetrically disposed at two outer sides of the mounting base and sleeved on the ratchet shafts, and the end of the handle is sleeved at two ends of the ratchet shafts and located at the outer sides of the two ratchet wheels; and/or, the height adjusting assembly further comprises a transmission belt, one end of the transmission belt is connected with the ratchet shaft on the inner side of the mounting seat, the other end of the transmission belt is connected with the lower end of the upper upright post, and the ratchet shaft rotates to be capable of rolling or unreeling the transmission belt, so that the upper upright post is driven to move up and down.

4. A gantry crane with adjustable height as claimed in claim 2, wherein the height adjustment assembly further comprises a first elastic member, the first stopper is a clamping plate slidably disposed on the mounting base, and one side of the clamping plate can be clamped into the tooth socket of the ratchet wheel; the first elastic piece is arranged between one side, away from the ratchet, of the clamping plate and the mounting seat and can generate force towards the ratchet to the clamping plate.

5. A gantry crane having an adjustable height as claimed in claim 2, wherein the driving portion of the handle is a flange, and the front side of the flange along the ascending direction of the rotation of the ratchet wheel is an arc-shaped edge and the rear side thereof is a bevel edge, so that the flange can sequentially push the two first stoppers apart to rotate the ratchet wheel tooth by tooth.

6. A height adjustable gantry crane apparatus as claimed in claim 2, wherein the height adjustment assembly further comprises a second elastic member, the second stop member is slidably disposed on the handle, and the second elastic member is disposed between a side of the second stop member facing away from the ratchet wheel and the handle and is capable of generating a force to the second stop member toward the ratchet wheel.

7. A height adjustable gantry crane as claimed in any one of claims 1 to 6, further comprising a wheel assembly disposed at the bottom of the lower frame, by which the height adjustable gantry crane can be supported and moved.

8. The gantry crane with adjustable height of claim 7, further comprising an adjusting leg assembly, wherein the adjusting leg assembly comprises a mounting shell and a leg, the mounting shell is fixedly arranged on one side of the bottom of the lower support, the leg is sleeved on the mounting shell and extends out from the bottom of the mounting shell, and the length of the leg extending out of the mounting shell can be adjusted to adjust the relative height of the bottom of the leg and the bottom of the walking wheel assembly in the vertical direction.

9. A height adjustable gantry crane apparatus as claimed in claim 1, further comprising a locking assembly disposed at one side of the lower frame and capable of abutting against the upper column to lock and reinforce the position of the upper column relative to the lower frame.

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