Multipurpose gantry crane capable of turning and walking

Abstract

The invention relates to the technical field of hoisting equipment, in particular to a multipurpose gantry crane capable of turning and walking, a telescopic bridge frame comprises a first suspension frame and a second suspension frame, the outer ends of the first suspension frame and the second suspension frame are fixed to the top ends of two supporting legs respectively, the inner ends of the first suspension frame and the second suspension frame are clamped in a sliding mode, a vertically-bent chain type guide rail is connected between the outer ends of the top faces of the first suspension frame and the second suspension frame, and a hoisting trolley transversely moves along the chain type guide rail; the first base comprises a first box body fixed to the bottom end of one supporting leg and a rotating ring set which is arranged on the lower side of the outer edge of the bottom face of the first box body and can rotate and vertically move, and the periphery of the middle of the bottom face of the first box body is fixedly sleeved with a plurality of sleeves; the second base comprises a second box fixed to the bottom end of the other supporting leg, a plurality of rotating bases rotationally arranged on the periphery of the middle of the bottom face of the second box in a sleeving mode and a second driving piece used for driving the rotating bases to rotate synchronously. The tops of the multiple walking wheel mechanisms are fixedly sleeved with the corresponding sleeves and inner cavities of the rotating bases correspondingly. And the problem that the gantry crane is difficult to flexibly turn and walk is well solved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, in particular to a multi-purpose gantry crane capable of turning and traveling. Background Art

[0002] A gantry crane, also known as a portal crane, is a type of overhead crane with a bridge supported on ground tracks by two outriggers. It structurally consists of a gantry, a trolley mechanism, a lifting trolley, and electrical components. Gantry cranes are primarily used outdoors.

[0003] Traditionally, the trolley operating mechanisms in commonly used gantry cranes mostly run along fixed tracks, that is, they can only perform lifting and material transfer work within a fixed rectangular range. In order to expand the coverage of the gantry crane's lifting work, there are methods in the existing technology that use curved tracks to meet the gantry crane's steering needs, and there are also methods that use trackless wheeled travel. However, both methods require a large turning radius, which requires a sufficiently large turning space, and are difficult to apply to some sites with limited space. In addition, whether it is a curved track turning method or a trackless wheel turning method, it is necessary to fully consider and solve the problem of precise matching of the displacement difference and steering angle difference of the trolley operating mechanisms on both sides when turning. The technical difficulty is relatively high, and the requirements for the equipment structure are also high, making it difficult to achieve.

[0004] Therefore, there is an urgent need for a multi-purpose gantry crane that can turn and travel to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-purpose gantry crane that can turn and move, so as to solve the problem in the prior art that gantry cranes are difficult to turn and move flexibly.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-purpose gantry crane capable of turning and walking, comprising legs and a lifting trolley, a retractable bridge comprising a suspension 1 and a suspension 2 whose outer ends are respectively fixed to the top ends of the two legs and whose inner ends slide and engage with each other along the axial direction, a vertically bendable chain guide rail is respectively connected between the front and rear parts of the outer end of the top surface of the suspension 1 and the front and rear parts of the outer end of the top surface of the suspension 2, and the lifting trolley moves laterally along the chain guide rail; a base 1 comprises a base fixed to the bottom of one of the legs The base comprises a box body 1 at the end and a rotating ring group which is arranged on the lower side of the outer edge of the bottom surface of the box body 1 and can rotate and move vertically. The outer periphery of the middle part of the bottom surface of the box body 1 is fixedly sleeved with multiple sleeves evenly distributed along the circumference; the base 2 includes a box body 2 fixed to the bottom end of the other support leg, multiple rotating seats rotatably sleeved on the outer periphery of the middle part of the bottom surface of the box body 2 and evenly distributed along the circumference, and a driving member 2 for driving the multiple rotating seats to rotate synchronously; the tops of the multiple walking wheel mechanisms are respectively fixedly sleeved on the corresponding sleeves and the inner cavity of the rotating seat.

[0007] Preferably, the walking wheel mechanism comprises a T-shaped commutator, a support cylinder fixedly connected to the outer edge of the top surface of the T-shaped commutator, a servo motor three fixedly connected to the top end of the support cylinder and having a power output shaft fixedly connected to the power input shaft of the top surface of the T-shaped commutator, and rollers fixedly sleeved on the power output shafts on both sides of the T-shaped commutator, and the support cylinder is fixedly sleeved with the corresponding sleeve and the inner cavity of the rotating seat.

[0008] Preferably, the base one comprises a rotating support, the rotating support comprises a lifting frame arranged in the inner cavity of the box one and used to drive the rotating ring set to move vertically, and a driving member one arranged in the inner cavity of the box one and used to drive the lifting frame to move vertically.

[0009] Preferably, the box one comprises a disc-shaped shell one and a top cover one, the sleeve is fixedly sleeved on the outer periphery of the middle part of the bottom surface of the disc-shaped shell one, the disc-shaped shell one is provided with a guide sleeve in the inner cavity bottom surface near the outer edge position and corresponding to the space between two adjacent sleeves, the top cover one comprises a connecting plate one fixedly connected to the bottom end of the supporting leg and a crescent plate one fixedly connected to the both sides of the connecting plate one and stitchedly connected to the outer edge of the top surface of the disc-shaped shell one, and the bottom part of the lifting frame is fixedly connected to the inner ring of the rotating ring set through the inner cavity of the guide sleeve.

[0010] Preferably, the driving member one comprises a servo motor one fixedly connected to the middle part of the inner cavity bottom surface of the disc-shaped shell one and a lead screw fixedly connected to the top end of the power output shaft of the servo motor one, the lifting frame comprises a cross frame, a threaded sleeve fixedly sleeved on the center of the cross frame and threadedly sleeved with the lead screw, and a vertical rod fixedly connected to the bottom surface of the outer end of the cross frame and slidably sleeved with the guide sleeve, and the rotating ring set comprises a fixed inner ring, a rotating outer ring rotatably sleeved on the outside of the fixed inner ring, a supporting ring fixedly connected to the bottom surface of the rotating outer ring, and a connecting block fixedly connected to the inner circumferential wall of the fixed inner ring and fixedly connected to the bottom end of the vertical rod.

[0011] Preferably, the box two comprises a disc-shaped shell two and a top cover two, the inner cavity bottom surface of the disc-shaped shell two is provided with a plurality of sleeve holes uniformly distributed along the circumference in the middle part of the outer periphery, the top cover two comprises a connecting plate two fixedly connected to the bottom end of the supporting leg and a crescent plate two fixedly connected to the both sides of the connecting plate two and stitchedly connected to the outer edge of the top surface of the disc-shaped shell two, and the rotating seat is rotatably sleeved in the sleeve hole.

[0012] Preferably, the sleeve hole top end outer edge is provided with an annular groove, the rotating seat comprises a cylinder body fixedly sleeved with the support cylinder, a ring body sleeved on the cylinder body near the bottom end and matched with the annular groove, and a gear one fixedly sleeved on the top end of the cylinder body, the driving part two comprises a servo motor two fixedly arranged on the middle part of the bottom surface of the inner cavity of the disc-shaped shell two, and a gear two fixedly sleeved on the top end of the power output shaft of the servo motor two and matched with the gear one.

[0013] Preferably, the suspension one comprises an end beam one fixedly arranged on the top surface of the support leg, and a pair of parallelly arranged cross beams one with outer ends fixedly connected to the front and rear ends of the top surface of the end beam one, the middle part of the top surface of the cross beam one is provided with a clamping groove along the axial direction, and the front and rear walls of the cross beam one are respectively provided with sliding grooves extending along the axial direction, the suspension two comprises an end beam two fixedly arranged on the top surface of the support leg, a pair of parallelly arranged cross beams two with outer ends fixedly connected to the front and rear ends of the top surface of the end beam two, and a plurality of short shafts rotatably sleeved in the middle part of the cross beam two, the cross beam two is slidingly clamped in the clamping groove, and the front and rear ends of the short shafts are respectively slidingly clamped in the sliding grooves, and the two ends of the chain guide rail are respectively connected to the outer end top surfaces of the corresponding cross beam one and cross beam two.

[0014] Preferably, the outer end of the top surface of the cross beam one is fixedly provided with a hinged seat one, the outer end of the top surface of the cross beam two is fixedly provided with a hinged seat two, the chain guide rail comprises a plurality of rectangular plates connected end to end, an ear plate integrally formed in the middle part of one end of the rectangular plate, and a hinged groove integrally formed in the middle part of the other end of the rectangular plate and rotatably clamped and matched with the ear plate, the ear plate is connected with the hinged seat two, and the hinged groove is connected with the hinged seat one.

[0015] Preferably, the short shafts are respectively sleeved with limiting rings penetrating through the front and rear ends of the sliding grooves.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The middle bridge of the multi-purpose turnable gantry crane disclosed by the present application is of telescopic structure, and the top surface of the telescopic bridge is provided with a vertically bendable chain guide rail, which not only facilitates reducing the turning range when the gantry crane turns as a whole, but also can be matched to bend vertically when the telescopic bridge telescopes, so as to meet the requirement of smooth telescoping of the bridge.

[0018] 2. The multi-purpose turnable gantry crane disclosed by the present application can complete the turning operation of the whole gantry crane by positioning and supporting one side support leg by the conversion assembly to serve as the turning center and making the walking wheel mechanism at the lower part of the other side support leg walk, so that the whole turning operation is efficient, smooth and convenient, the turning structure is simple, the technical difficulty is low, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The schematic diagram of the whole structure of the present application;

[0020] Figure 2 The schematic diagram of the whole structure of the present application;

[0021] Figure 3 The schematic diagram of the whole structure of the present application;

[0022] Figure 4 The schematic diagram of the whole structure of the present application;

[0023] Figure 5 The schematic diagram of the whole structure of the present application;

[0024] Figure 6 The schematic diagram of the whole structure of the present application;

[0025] Figure 7 The schematic diagram of the whole structure of the present application;

[0026] Figure 8 The schematic diagram of the whole structure of the present application;

[0027] Figure 9 The schematic diagram of the whole structure of the present application;

[0028] Figure 10 The schematic diagram of the whole structure of the present application;

[0029] Figure 11 The schematic diagram of the whole structure of the present application;

[0030] Figure 12 The schematic diagram of the whole structure of the present application;

[0031] Figure 13 The schematic diagram of the whole structure of the present application.

[0032] In the figure: 1-branch leg;

[0033] 2-Telescopic bridge; 2.1-Suspension 1; 2.1.1-End beam 1; 2.1.2-Cross beam 1; 2.1.2.1-Slot; 2.1.2.2-Sliding groove; 2.1.3-Hinge seat 1; 2.2-Suspension 2; 2.2.1-End beam 2; 2.2.2-Cross beam 2; 2.2.3-Short shaft; 2.2.4-Limiting ring; 2.2.5-Hinge seat 2; 2.3-Chain guide rail; 2.3.1-Rectangular plate; 2.3.2-Ear plate; 2.3.3-Hinge groove;

[0034] 3-Overhead travelling crane;

[0035] 4-base one; 4.1-box one; 4.1.1-disk-shaped housing one; 4.1.1.1-sleeve; 4.1.1.2-guide sleeve; 4.1.2-top cover one; 4.1.2.1-connection plate one; 4.1.2.2-crescent plate one; 4.2-rotary support; 4.2.1-lifting frame; 4.2.1.1-cross; 4.2.1.2-vertical rod; 4.2.1.3-threaded sleeve; 4.2.2-rotary ring group; 4.2.2.1-fixed inner ring; 4.2.2.2-rotary outer ring; 4.2.2.3-support ring; 4.2.2.4-connection block; 4.2.3-driving member one; 4.2.3.1-servo motor one; 4.2.3.2-screw rod;

[0036] 5-base two; 5.1-box two; 5.1.1-disk-shaped housing two; 5.1.1.1-sleeve hole; 5.1.1.2-annular groove; 5.1.2-top cover two; 5.1.2.1-connection plate two; 5.1.2.2-crescent plate two; 5.2-rotary seat; 5.2.1-cylinder; 5.2.2-gear one; 5.2.3-ring body; 5.3-driving member two; 5.3.1-servo motor two; 5.3.2-gear two;

[0037] 6-traveling wheel mechanism; 6.1-T-shaped commutator; 6.2-supporting cylinder; 6.3-servo motor three; 6.4-roller. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0039] Please refer to Figures 1-13The application provides a technical scheme, a multi-purpose turning walking gantry crane, which comprises a supporting leg 1 and a hoist trolley 3, and a telescopic bridge 2 which comprises a suspension 1 and a suspension 2, the outer ends of the top surfaces of the suspensions are respectively fixed to the top ends of the two supporting legs 1 and the inner ends of the suspensions slide and match with each other in the axial direction, the front and back parts of the outer ends of the top surfaces of the suspensions are respectively connected with vertically bendable chain rails 2.3, and the hoist trolley 3 moves laterally along the chain rails 2.3. The suspension 1 comprises an end beam 1.1 fixed to the top surface of the supporting leg 1 and a pair of parallelly arranged cross beams 1.2, the outer ends of which are respectively fixed to the front and back ends of the top surface of the end beam 1.1, the middle part of the top surface of the cross beam 1.2 is provided with a clamping groove 1.2.1 in the axial direction, and the front and back walls of the cross beam 1.2 are respectively provided with sliding grooves 1.2.2 extending in the axial direction, the suspension 2 comprises an end beam 2.1 fixed to the top surface of the supporting leg 1, a pair of parallelly arranged cross beams 2.2, the outer ends of which are respectively fixed to the front and back ends of the top surface of the end beam 2.1, and a plurality of short shafts 2.3 rotatably sleeved to the inner ends of the cross beams 2.2, the cross beam 2.2 is slidably connected to the clamping groove 1.2.1, the front and back ends of the short shaft 2.3 are respectively slidably connected to the sliding grooves 1.2.2, and in addition, the front and back ends of the short shaft 2.3 are respectively sleeved with limiting rings 2.4.

[0040] The two ends of the chain guide rail 2.3 are connected to the outer top surfaces of the corresponding beam one 2.1.2 and beam two 2.2.2. Among them, the outer end of the top surface of the beam one 2.1.2 is fixed with the hinge seat one 2.1.3, the outer end of the top surface of the beam two 2.2.2 is fixed with the hinge seat two 2.2.5, the chain guide rail 2.3 includes a plurality of rectangular plates 2.3.1 connected end to end, an ear plate 2.3.2 integrally formed in the middle of one end of the rectangular plate 2.3.1, and a hinge groove 2.3.3 integrally formed in the middle of the other end of the rectangular plate 2.3.1 and rotatably connected with the ear plate 2.3.2. The ear plate 2.3.2 is connected with the hinge seat two 2.2.5, and the hinge groove 2.3.3 is connected with the hinge seat one 2.1.3. That is, when the beam two 2.2.2 slides in the clamping groove 2.1.2.1, the short shaft 2.2.3 slides along the sliding groove 2.1.2.2 to realize the lengthening and shortening operation of the telescopic bridge 2 as a whole. When the telescopic bridge 2 as a whole is shortened, the trolley 3 can be moved to the position close to one end of the telescopic bridge 2 first. With the shortening of the telescopic bridge 2, the rectangular plates 2.3.1 in the chain guide rail 2.3 gradually present a wave shape to achieve the effect of shortening the transverse length of the guide rail 2.3, so as to adapt to the shortening operation of the telescopic bridge 2 as a whole. When the telescopic bridge 2 as a whole is lengthened to the longest state, the chain guide rail 2.3 is in a straightened state, and the width of the chain guide rail 2.3 is wider than the width of the clamping groove 2.1.2.1. In this way, the beam one 2.1.2 and the beam two 2.2.2 can effectively support the chain guide rail 2.3 together, so as to ensure that the chain guide rail 2.3 is in a straight state to meet the transverse walking of the trolley 3.

[0041] The walking wheel mechanism 6 includes a T-shaped commutator 6.1, a support cylinder 6.2 fixedly connected to the outer edge of the top surface of the T-shaped commutator 6.1, a servo motor three 6.3 fixed to the top end of the support cylinder 6.2 and having a power output shaft fixedly connected to a power input shaft on the top surface of the T-shaped commutator 6.1, and rollers 6.4 fixedly sleeved on the power output shafts on both sides of the T-shaped commutator 6.1. The support cylinder 6.2 is fixedly sleeved and matched with the corresponding sleeve 4.1.1.1 and the inner cavity of the rotating seat 5.2. That is, the servo motor three 6.3 drives the rollers 6.4 on both sides to roll synchronously through the T-shaped commutator 6.1 to realize the load walking process of the walking wheel mechanism 6.

[0042] The base 4 comprises a box 4.1 fixed to the bottom end of one of the legs 1 and a rotating ring set 4.2.2 arranged on the lower side of the outer edge of the bottom surface of the box 4.1 and capable of rotating and vertical movement. The outer periphery of the middle part of the bottom surface of the box 4.1 is fixedly sleeved with four sleeve 4.1.1.1 uniformly distributed in the circumferential direction. The base 4 comprises a rotating support 4.2, which comprises a lifting frame 4.2.1 arranged in the inner cavity of the box 4.1 and used to drive the vertical movement of the rotating ring set 4.2.2, and a driving member 4.2.3 arranged in the inner cavity of the box 4.1 and used to drive the vertical movement of the lifting frame 4.2.1. The specific structure of the box 4.1: the box 4.1 comprises a disc-shaped shell 4.1.1 and a top cover 4.1.2, the sleeve 4.1.1.1 is fixedly sleeved on the outer periphery of the middle part of the bottom surface of the disc-shaped shell 4.1.1, and the sleeve 4.1.1.1 is fixedly sleeved with the support cylinder 6.2. The inner cavity of the disc-shaped shell 4.1.1 is sleeved with a guide sleeve 4.1.1.2 near the outer edge of the bottom surface and corresponding to the space between the adjacent two sleeves 4.1.1.1. The top cover 4.1.2 comprises a connecting plate 4.1.2.1 fixedly connected with the bottom end of the leg 1 and a crescent plate 4.1.2.2 fixedly connected with the outer edge of the top surface of the disc-shaped shell 4.1.1 on both sides of the connecting plate 4.1.2.1 and connected by bolt stitching. The bottom of the lifting frame 4.2.1 is fixedly connected with the inner ring of the rotating ring set 4.2.2 through the inner cavity of the guide sleeve 4.1.1.2, wherein the driving member 4.2.3 comprises a servo motor 4.2.3.1 fixedly connected with the middle part of the bottom surface of the inner cavity of the disc-shaped shell 4.1.1 and a lead screw 4.2.3.2 fixedly connected with the top end of the power output shaft of the servo motor 4.2.3.1. The lifting frame 4.2.1 comprises a cross frame 4.2.1.1, a threaded sleeve 4.2.1.3 fixedly sleeved with the cross frame 4.2.1.1 at the center and threadedly sleeved with the lead screw 4.2.3.2, and a vertical rod 4.2.1.2 fixedly connected with the outer end bottom surface of the cross frame 4.2.1.1 at the top and slidably sleeved with the guide sleeve 4.1.1.2. The rotating ring set 4.2.2 comprises a fixed inner ring 4.2.2.1, a rotating outer ring 4.2.2.2 rotatably sleeved outside the fixed inner ring 4.2.2.1, a support ring 4.2.2.3 fixedly connected with the bottom surface of the rotating outer ring 4.2.2.2, and a connecting block 4.2.2.4 fixedly connected with the bottom end of the vertical rod 4.2.1.2.That is, the servo motor 4.2.3.1 drives the screw rod 4.2.3.2 to rotate, and the rotating screw rod 4.2.3.2 drives the entire lifting frame 4.2.1 to move downward through the threaded sleeve 4.2.1.3, the vertical rod 4.2.1.2 moves downward along the guide sleeve 4.1.1.2, so as to realize the overall descent of the rotating ring group 4.2.2, until the supporting ring 4.2.2.3 is pressed and supported on the ground, and the ground of the supporting ring 4.2.2.3 is provided with a resistance increasing layer, so that the bottom surface of the supporting ring 4.2.3 has a large frictional resistance with the ground, and the bottom of the walking wheel mechanism 6 fixedly sleeved in the sleeve 4.1.1.1 is in a state close to being separated from the ground.

[0043] The base two 5 includes a box two 5.1 fixed to the bottom end of the other leg 1, four rotating seats 5.2 rotatingly sleeved on the outer periphery of the middle part of the bottom surface of the box two 5.1 and uniformly distributed in the circumferential direction, and a driving member two 5.3 for driving the four rotating seats 5.2 to rotate synchronously. Among them, the box two 5.1 includes a disc-shaped shell two 5.1.1 and a top cover two 5.1.2, the disc-shaped shell two 5.1.1 is provided with four sleeve holes 5.1.1.1 uniformly distributed in the circumferential direction on the outer periphery of the middle part of the bottom surface of the inner cavity, and the top cover two 5.1.2 includes a connecting plate two 5.1.2.1 fixedly connected with the bottom end of the leg 1 and two crescent plates two 5.1.2.2 fixedly connected with the outer edge of the top surface of the disc-shaped shell two 5.1.1 on both sides of the connecting plate two 5.1.2.1, and the rotating seats 5.2 are respectively rotatingly sleeved in the sleeve holes 5.1.1.1. The outer edge of the top end of the sleeve hole 5.1.1.1 is provided with an annular groove 5.1.1.2, the rotating seat 5.2 includes a cylinder 5.2.1 fixedly sleeved with the supporting cylinder 6.2, a ring body 5.2.3 sleeved on the cylinder 5.2.1 close to the bottom end position and sleeved with the annular groove 5.1.1.2, and a gear one 5.2.2 fixedly sleeved on the top end of the cylinder 5.2.1, and the driving member two 5.3 includes a servo motor two 5.3.1 fixedly sleeved on the middle part of the bottom surface of the inner cavity of the disc-shaped shell two 5.1.1 and a gear two 5.3.2 fixedly sleeved on the top end of the power output shaft of the servo motor two 5.3.1 and engaged with the gear one 5.2.2. That is, the servo motor two 5.3.1 drives the gear two 5.3.2 to rotate, the gear two 5.3.2 is engaged with the gear one 5.2.2 to drive, so that the rotating seat 5.2 rotates as a whole, and the walking wheel mechanism 6 is fixedly sleeved in each rotating seat 5.2, so as to realize the synchronous adjustment of the movement direction of the corresponding four walking wheel mechanisms 6.

[0044] In summary, when the gantry crane is normally hoisting and straight walking, the telescopic bridge 2 is elongated to the longest state to ensure that the chain guide rail 2.3 maintains a straight state, so that the lifting trolley 3 can smoothly walk along the chain guide rail 2.3. At this time, the rotating ring group 4.2.2 is located above the ground and at the peripheral position of the corresponding four walking wheel mechanisms 6. The walking wheel mechanisms 6 at the bottom of the two side legs 1 are kept in the state of walking forward and backward.

[0045] When the gantry crane needs to turn and walk, the driving member 1 4.2.3 first drives the lifting frame 4.2.1 to move downward until the support ring 4.2.2.3 is pressed to support on the ground.

[0046] Then the driving member 2 5.3 drives the four rotating seats 5.2 on the periphery to synchronously rotate to 90°, that is, the corresponding four walking wheel mechanisms 6 are rotated by 90° in the running direction, and the four walking wheel mechanisms 6 are started to walk synchronously to carry the support leg 1 above to move in the direction of another support leg 1, at this time the telescopic bridge 2 is shortened accordingly, and when the end of the cross beam 2.2.2 moves to the end of the clamping groove 2.1.2.1, the running of the four walking wheel mechanisms 6 is stopped.

[0047] Then the driving member 2 5.3 is reversely driven to make the four walking wheel mechanisms 6 at the base 2 5 rotate to the original position with the rotating seats 5.2.

[0048] Then the four walking wheel mechanisms 6 at the base 2 5 are started to run synchronously, at this time the base 1 4 does not have horizontal displacement and serves as the center of rotation, that is, with the walking of the four walking wheel mechanisms 6 at the base 2 5, the support ring 4.2.2.3 is kept fixed by being pressed on the ground, and the base 1 4 and the corresponding four walking wheel mechanisms 6 are rotated with the fixed inner ring 4.2.2.1 relative to the rotating outer ring 4.2.2.2, so that the running direction of the gantry crane as a whole is adjusted to complete the turning of the gantry crane as a whole.

[0049] Then, the driving member 2 5.3 drives the corresponding four walking wheel mechanisms 6 to rotate by 90° through the four rotating seats 5.2 on the periphery, and then the four walking wheel mechanisms 6 are started to make the corresponding support leg 1 of the base 2 5 move away from the other support leg 1, and the telescopic bridge 2 is elongated as a whole, and when the telescopic bridge 2 is elongated to the longest state, the chain guide rail 2.3 also returns to the flat state.

[0050] Then the driving member 2 5.3 resets the running direction of the corresponding four walking wheel mechanisms 6.

[0051] Then the driving member 1 4.2.3 drives the rotating ring group 4.2.2 as a whole through the lifting frame 4.2.1 to rise to the position where the support ring 4.2.2.3 is separated from the ground, and the four walking wheel mechanisms 6 at the bottom of the base 1 4 are used again to carry the support leg 1 to walk. Thus the gantry crane after turning is restored to the normal state of hoisting and straight-line walking.

[0052] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0053] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A multi-purpose gantry crane capable of turning and traveling, comprising a support leg (1) and a lifting trolley (3), characterized in that: Also includes: The retractable bridge (2) comprises a suspension frame (2.1) and a suspension frame (2.2) whose outer ends are respectively fixed to the top ends of the two legs (1) and whose inner ends are axially slidably engaged with each other, and a vertically bendable chain guide rail (2.3) is correspondingly connected between the front and rear parts of the outer end of the top surface of the suspension frame (2.1) and the front and rear parts of the outer end of the top surface of the suspension frame (2.2), and the lifting trolley (3) moves laterally along the chain guide rail (2.3); A base (4) comprising a box (4.1) fixed to the bottom end of one of the legs (1) and a rotating ring assembly (4.2.2) provided on the lower side of the outer edge of the bottom surface of the box (4.1) and capable of rotating and vertically moving, wherein a plurality of sleeves (4.1.1.1) uniformly distributed along the circumference are mounted on the outer fixed sleeve in the middle of the bottom surface of the box (4.1); A second base (5) comprises a second box body (5.1) fixed to the bottom end of the other leg (1), a plurality of rotating seats (5.2) rotatably mounted on the periphery of the middle portion of the bottom surface of the second box body (5.1) and evenly distributed along the circumference, and a second driving member (5.3) for driving the plurality of rotating seats (5.2) to rotate synchronously; A walking wheel mechanism (6), wherein the tops of the plurality of walking wheel mechanisms (6) are respectively fixedly sleeved on the corresponding inner cavities of the sleeve (4.1.1.1) and the rotating seat (5.2).

2. A multi-purpose gantry crane capable of turning and traveling according to claim 1, characterized in that: The walking wheel mechanism (6) comprises a T-shaped commutator (6.1), a support tube (6.2) whose bottom end is fixedly connected to the outer edge of the top surface of the T-shaped commutator (6.1), a servo motor (6.3) fixed to the top of the support tube (6.2) and whose power output shaft is fixedly docked with the power input shaft on the top surface of the T-shaped commutator (6.1), and rollers (6.4) respectively fixedly sleeved on the power output shafts on both sides of the T-shaped commutator (6.1). The support tube (6.2) is respectively fixedly sleeved and matched with the corresponding sleeve (4.1.1.1) and the inner cavity of the rotating seat (5.2).

3. The multi-purpose gantry crane capable of turning and traveling according to claim 1, characterized in that: The base (4) includes a rotating support (4.2), and the rotating support (4.2) includes a lifting frame (4.2.1) arranged in the inner cavity of the box (4.1) and used to drive the rotating ring group (4.2.2) to move vertically, and a driving member (4.2.3) arranged in the inner cavity of the box (4.1) and used to drive the lifting frame (4.2.1) to move vertically.

4. The multi-purpose gantry crane capable of turning and traveling according to claim 3, characterized in that: The box body (4.1) includes a disc-shaped shell (4.1.1) and a top cover (4.1.2). The sleeve (4.1.1.1) is fixedly mounted on the periphery of the middle portion of the bottom surface of the disc-shaped shell (4.1.1). The bottom surface of the inner cavity of the disc-shaped shell (4.1.1) is close to the outer edge and is respectively mounted with a guide sleeve (4.1.1.2) between two adjacent sleeves (4.1.1.1). The top cover (4 .1.2) includes a connecting plate (4.1.2.1) fixedly connected to the bottom end of the support leg (1) and a crescent plate (4.1.2.2) fixed on both sides of the connecting plate (4.1.2.1) and sewn to the outer edge of the top surface of the disc-shaped shell (4.1.1), and the bottom of the lifting frame (4.2.1) is fixedly connected to the inner ring of the rotating ring group (4.2.2) through the inner cavity of the guide sleeve (4.1.1.2).

5. The multi-purpose gantry crane capable of turning and traveling according to claim 4, characterized in that: The driving member (4.2.3) comprises a servo motor (4.2.3.1) whose bottom is fixedly connected to the middle of the bottom surface of the inner cavity of the disc-shaped shell (4.1.1) and a screw (4.2.3.2) fixedly docked to the top of the power output shaft of the servo motor (4.2.3.1). The lifting frame (4.2.1) comprises a cross (4.2.1.1), a threaded sleeve (4.2.1.3) fixedly sleeved on the center of the cross (4.2.1.1) and threadedly sleeved with the screw (4.2.3.2), and a top fixedly connected to the cross (4.

2. 1.1) and is slidably sleeved on the bottom surface of the outer end of the vertical rod (4.2.1.2) and the guide sleeve (4.1.1.2), the rotating ring group (4.2.2) includes a fixed inner ring (4.2.2.1), a rotating outer ring (4.2.2.2) rotatably sleeved on the outside of the fixed inner ring (4.2.2.1), a supporting ring (4.2.2.3) fixedly connected to the bottom surface of the rotating outer ring (4.2.2.2) and a connecting block (4.2.2.4) fixed to the inner circumferential wall of the fixed inner ring (4.2.2.1) and fixedly connected to the bottom end of the vertical rod (4.2.1.2).

6. The multi-purpose gantry crane capable of turning and traveling according to claim 2, characterized in that: The second box body (5.1) includes a second disc-shaped shell (5.1.1) and a second top cover (5.1.2). The outer periphery of the middle portion of the inner cavity bottom surface of the second disc-shaped shell (5.1.1) is evenly provided with a plurality of sleeve holes (5.1.1.1) along the circumferential direction. The second top cover (5.1.2) includes a second connecting plate (5.1.2.1) fixedly connected to the bottom end of the support leg (1) and a second crescent plate (5.1.2.2) fixed to both sides of the second connecting plate (5.1.2.1) and sewn to the outer edge of the top surface of the second disc-shaped shell (5.1.1). The rotating seat (5.2) is respectively rotatably fitted into the sleeve holes (5.1.1.1).

7. The multi-purpose gantry crane capable of turning and traveling according to claim 6, characterized in that: The outer edge of the top of the sleeve hole (5.1.1.1) is provided with an annular groove ( 5.1.1.2), the rotating seat (5.2) includes a cylinder (5.2.1) fixedly sleeved and matched with the support cylinder (6.2), a ring body (5.2.3) sleeved on the cylinder (5.2.1) near the bottom end and sleeved and matched with the annular groove (5.1.1.2), and a gear one (5.2.2) fixedly sleeved on the top of the cylinder (5.2.1), and the driving member two (5.3) includes a servo motor two (5.3.1) whose bottom end is fixed to the middle of the bottom surface of the inner cavity of the disc-shaped shell two (5.1.1) and a gear two (5.3.2) fixedly sleeved on the top of the power output shaft of the servo motor two (5.3.1) and meshing with the gear one (5.2.2).

8. The multi-purpose gantry crane capable of turning and traveling according to claim 1, characterized in that: The suspension frame 1 (2.1) comprises an end beam 1 (2.1.1) fixed to the top surface of the support leg (1) and a cross beam 1 (2.1.2) arranged in pairs in parallel and with the outer ends respectively fixedly connected to the front and rear ends of the top of the end beam 1 (2.1.1), a clamping groove (2.1.2.1) is provided in the middle of the top surface of the cross beam 1 (2.1.2) along its axial direction, and the front and rear walls of the cross beam 1 (2.1.2) are respectively provided with a sliding groove (2.1.2.2) extending along its axial direction, and the suspension frame 2 (2.2) comprises an end beam 2 (2.2.1) fixed to the top surface of the support leg (1), a cross beam 1 (2.2.1) arranged in pairs in parallel and with the outer ends respectively fixedly connected to the front and rear ends of the top of the end beam 1 (2.1.1), A second crossbeam (2.2.2) is arranged and its outer ends are respectively fixedly connected to the front and rear ends of the top of the second end beam (2.2.1) and a plurality of short shafts (2.2.3) whose middle parts are rotatably sleeved on the inner ends of the second crossbeam (2.2.2); the second crossbeam (2.2.2) is slidably engaged in the card slot (2.1.2.1); the front and rear ends of the short shafts (2.2.3) are respectively slidably engaged in the slide slot (2.1.2.2); the two ends of the chain guide rail (2.3) are respectively connected to the outer end top surfaces of the corresponding first crossbeam (2.1.2) and second crossbeam (2.2.2).

9. The multi-purpose gantry crane capable of turning and traveling according to claim 8, characterized in that: The outer end of the top surface of the first crossbeam (2.1.2) is fixed with a hinge seat 1 (2.1.3), the outer end of the top surface of the second crossbeam (2.2.2) is fixed with a hinge seat 2 (2.2.5), the chain guide rail (2.3) comprises a plurality of rectangular plates (2.3.1) connected end to end, an ear plate (2.3.2) integrally formed in the middle of one end of the rectangular plate (2.3.1), and a hinge groove (2.3.3) integrally formed in the middle of the other end of the rectangular plate (2.3.1) and rotatably engaged with the ear plate (2.3.2), the ear plate (2.3.2) is connected to the second hinge seat (2.2.5), and the hinge groove (2.3.3) is connected to the first hinge seat (2.1.3).

10. The multi-purpose gantry crane capable of turning and traveling according to claim 8, characterized in that: The front and rear ends of the short shaft (2.2.3) passing through the slide groove (2.1.2.2) are respectively fitted with limiting rings (2.2.4).

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