Crane supporting leg overturning structure

Abstract

The invention relates to the technical field of hoisting instruments, in particular to a crane supporting leg overturning structure which comprises a mounting plate, a supporting leg, a supporting leg, a supporting leg, a supporting leg, a supporting leg and a supporting leg, the mounting plate is vertically fixed to the end of a supporting beam, and a sliding groove is formed in the middle of the mounting plate; a through hole is formed in the middle of the sliding block, the sliding block is arranged in the sliding groove, and the sliding groove accommodates the sliding block to vertically slide; the buffer springs are located in the sliding grooves and vertically fixed to the upper side and the lower side, and one ends of the buffer springs are connected with the sliding blocks so that the sliding blocks can be suspended in the sliding grooves; according to the crane supporting leg overturning structure provided by the invention, the supporting leg in the storage state is elastically connected with the crane through the buffer spring, and the supporting leg is buffered and protected through the buffer spring, so that the influence of vibration on the supporting leg in the moving process of the crane is reduced, the rigid impact received by the supporting leg is reduced, and the abrasion rate of all parts of the supporting leg is reduced; the service life of the supporting leg is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and particularly relates to a crane outrigger flipping structure. Background Art

[0002] The function of the crane outrigger is to provide a larger support span for the crane's operation without increasing the width of the crane, thereby improving its lifting characteristics without reducing the mobility of the crane. Common types include frog outriggers, H-shaped outriggers, X-shaped outriggers, and radial outriggers.

[0003] For the above-mentioned H-shaped outrigger, the outrigger is connected to the support beam through a shaft, and the state of the outrigger is switched by the rotation of the shaft. When in the working state, the shaft rotates to drive the outrigger to face vertically downward and contact the ground to provide support force for the crane. When the crane moves, the shaft rotates to drive the outrigger to face vertically upward to store the outrigger. However, in actual use, in industries such as coal mines and oil fields, it is inevitable that the crane needs to drive on relatively bumpy roads. With the undulation of the road, the crane will generate relatively strong vibrations. Since the outrigger is rigidly connected to the crane through the shaft, the outrigger will also show obvious vibrations during the crane's driving process, and the outrigger may also receive relatively strong rigid impacts. Whether it is vibration or rigid impact, it will cause rapid wear of the outrigger components and reduce the service life of the outrigger. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawback in the prior art that the service life of the outrigger is reduced due to road bumps of the crane, and to propose a crane outrigger flipping structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] Design a crane outrigger flipping structure, including:

[0007] A mounting plate, which is vertically fixed at the end of the support beam, and a chute is provided in the middle of the mounting plate;

[0008] A slider with a through hole in the middle, the slider is arranged in the chute, and the chute allows the slider to slide vertically;

[0009] Multiple buffer springs, the buffer springs are located in the chute and are vertically fixed on the upper and lower sides, and one end of the buffer spring is connected to the slider so that the slider floats in the chute;

[0010] An eccentric wheel and multiple guide blocks, the guide blocks are fixedly connected to the outer wall of the slider, and the multiple guide blocks are on the same circumference. A circular guide groove is provided on one end face of the eccentric wheel, and the guide blocks are in sliding fit with the guide groove so that the eccentric wheel rotates on the guide blocks. A connection structure for the outrigger is provided on the other end face of the eccentric wheel;

[0011] and an arc-shaped limiting block which is fixed on the outer wall of the mounting plate and against which the outer ring of the eccentric wheel abuts when rotating to the highest point.

[0012] Preferably, the connecting structure includes an external spline tube fixedly connected to the end face of the eccentric wheel. A first internal spline tube is sleeved outside the external spline tube. One end of the support leg is fixedly connected to the outer wall of the first internal spline tube. A fastening bolt is in threaded fit with the port of the external spline tube to limit the first internal spline tube to prevent its axial movement.

[0013] Preferably, the guiding block is made of an elastic material, has the ability of elastic deformation, and is in interference fit in the guiding groove.

[0014] Preferably, a housing is sleeved outside the support beam and fixed on the crane chassis to accommodate the horizontal sliding of the support beam.

[0015] Preferably, a transmission structure is provided in the support beam to drive the rotation of the external spline tube. The transmission structure includes a load-bearing plate fixedly connected to the inner wall of the support beam. A second internal spline tube is installed through the load-bearing plate and is rotationally matched with the load-bearing plate. A spline shaft is slidably matched in the second internal spline tube, and the end of the spline shaft is slidably matched in the external spline tube.

[0016] Preferably, a plurality of slots are equidistantly formed on the outer wall of the end of the spline shaft. A fixing ring and a rotating ring are provided in the external spline tube. The fixing ring is fixedly connected to the external spline tube, and the rotating ring is rotationally matched with the external spline tube. A plurality of insertion blocks are fixedly connected to one end face of the rotating ring, and the insertion blocks are slidably matched in the slots.

[0017] Preferably, a plurality of sliding blocks are equidistantly fixedly connected to the other end face of the rotating ring, and a plurality of fixing blocks are equidistantly fixedly connected to the end face of the fixing ring. A groove is formed between two adjacent fixing blocks, and the sliding blocks are slidably matched in the grooves.

[0018] For a crane outrigger flipping structure proposed by the present invention, the beneficial effects are as follows: for the crane outrigger flipping structure provided by the present invention, the outrigger in the retracted state is elastically connected to the crane through a buffer spring. The buffer spring buffers and protects the outrigger to reduce the impact of vibration on the outrigger during the movement of the crane, reduce the rigid impact received by the outrigger, reduce the wear rate of each component of the outrigger, and extend the service life of the outrigger. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a crane outrigger flipping structure proposed by the present invention.

[0020] Figure 2Schematic diagram of the support beam of a leg flipping structure of a crane proposed by the present invention.

[0021] Figure 3 Schematic diagram of the leg and mounting plate of a leg flipping structure of a crane proposed by the present invention.

[0022] Figure 4 Schematic cross-sectional view of the mounting plate of a leg flipping structure of a crane proposed by the present invention.

[0023] Figure 5 Schematic cross-sectional view of the first internal spline tube of a leg flipping structure of a crane proposed by the present invention.

[0024] Figure 6 Plan view of the mounting plate of a leg flipping structure of a crane proposed by the present invention.

[0025] Figure 7 Schematic diagram of the mating structure of the fastening bolt and the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0026] Figure 8 Schematic diagram of the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0027] Figure 9 Schematic diagram of the mating structure of the limit block and the mounting plate of a leg flipping structure of a crane proposed by the present invention.

[0028] Figure 10 Schematic diagram of the mating structure of the eccentric wheel and the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0029] Figure 11 Schematic diagram of the mating structure of the spline shaft and the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0030] Figure 12 Exploded view of the spline shaft and the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0031] Figure 13 Schematic diagram of the internal structure of the external spline tube of a leg flipping structure of a crane proposed by the present invention.

[0032] In the figure: 1. housing; 2. support beam; 3. connecting plate; 4. load-bearing plate; 5. second internal spline tube; 6. spline shaft; 7. electric cylinder; 8. bearing block; 9. mounting plate; 10. chute; 11. slider; 12. buffer spring; 13. eccentric wheel; 14. guide groove; 15. guide block; 16. external spline tube; 17. slot; 18. plug; 19. fixing ring; 20. rotating ring; 21. fixing block; 22. sliding block; 23. limiting block; 24. first internal spline tube; 25. fastening bolt; 26. leg. Detailed implementation manner

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Refer to Figure 1 , a leg flipping structure of a crane, including a flipping structure, a connecting structure and a transmission structure, wherein:

[0035] As Figures 1-10 shown, the flipping structure includes: a housing 1, a mounting plate 9, a slider 11 with a through hole in the middle, a plurality of buffer springs 12, a plurality of guide blocks 15, an eccentric wheel 13 and an arc-shaped limiting block 23. The housing 1 is fixed on the crane chassis, and the housing 1 is sleeved on the support beam 2 to accommodate the horizontal sliding of the support beam 2. A connecting plate 3 is fixedly connected to the end of the support beam 2 for welding and mounting the mounting plate 9, and a chute 10 is provided in the middle of the mounting plate 9; the slider 11 is arranged in the chute 10, and the chute 10 accommodates the vertical sliding of the slider 11; the buffer springs 12 are located in the chute 10 and are vertically fixed on the upper and lower sides. One end of the buffer spring 12 is connected to the slider 11 so that the slider 11 floats in the chute 10; the guide blocks 15 are fixedly connected to the outer wall of the slider 11, and a plurality of guide blocks 15 are on the same circumference. A circular guide groove 14 is provided on one end face of the eccentric wheel 13, and the guide block 15 is slidably matched with the guide groove 14 so that the eccentric wheel 13 rotates on the guide block 15. The guide block 15 is made of an elastic material and has the ability of elastic deformation, and the guide block 15 is in interference fit in the guide groove 14. The other end face of the eccentric wheel 13 is connected to the leg 26 through a connecting structure; the limiting block 23 is fixed on the outer wall of the mounting plate 9, and when the outer circle of the eccentric wheel 13 rotates to the highest point, it will abut against the inner circle of the limiting block 23.

[0036] The leg 26 is connected to the eccentric wheel 13 through a connecting structure. When the eccentric wheel 13 rotates on the guide block 15, the leg 26 will also rotate accordingly, thereby completing the flipping of the leg 26.

[0037] The action of flipping the leg 26 is used to switch the state of the leg, so that the leg 26 is switched between the retracted state and the working state, wherein:

[0038] Working status: Figure 1 and Figure 2 As shown, in the working state, the eccentric wheel 13 rotates on the guide block 15 until the leg 26 is vertically downward. At this time, the eccentric wheel 13 rotates to the top against the apex of the inner circle of the limit block 23, and the bottom of the leg 26 contacts the ground to provide support force for the crane.

[0039] Storage state: When the crane is moving, the outrigger 26 will enter the storage state. In the storage state, the eccentric wheel 13 rotates on the guide block 15 until the outrigger 26 is vertically facing upward. At this time, the eccentric wheel 13 is no longer in contact with the inner ring of the limit block 23, and the outrigger 26 is completely supported by the slider 11 to overcome the gravity, and the slider 11 is suspended in the slide 10 under the elastic force of multiple buffer springs 12. In this state, when the crane passes through a bumpy road during movement, the amplitude of the vibration of the outrigger 26 in the vertical direction will act on the buffer spring 12 through the slider 11, and the buffer spring 12 will buffer and protect the outrigger 26;

[0040] Furthermore, since the guide block 15 is interference-fitted in the guide groove 14 , the eccentric wheel 13 will not rotate on the guide block 15 at will due to the friction force therebetween.

[0041] Compared with the prior art method of rigidly connecting the outrigger 26 to the crane, the crane outrigger flipping structure provided by the present invention has the outrigger 26 in the stored state elastically connected to the crane via a buffer spring 12. The buffer spring 12 provides buffering protection for the outrigger 26 to reduce the impact of vibration on the outrigger 26 during the movement of the crane, reduce the rigid impact received by the outrigger 26, reduce the wear rate of the various components of the outrigger 26, and extend the service life of the outrigger 26.

[0042] like Figure 4 and Figure 5 As shown, the connection structure includes an external spline tube 16, which is fixedly connected to the end face of the eccentric wheel 13. A first internal spline tube 24 is sleeved on the outside of the external spline tube 16. One end of the support leg 26 is fixedly connected to the outer wall of the first internal spline tube 24. A fastening bolt 25 is provided in cooperation with the internal thread at the port of the external spline tube 16 to limit the first internal spline tube 24 to prevent the first internal spline tube 24 from axial movement.

[0043] The support leg 26 is sleeved on the outer spline tube 16 through the first inner spline tube 24 at the top, and the axial movement of the first inner spline tube 24 is limited by the fastening bolts 25 at the end of the outer spline tube 16. The connection method of the support leg 26 is simple and clear, and it is more convenient to install and disassemble the support leg 26.

[0044] like Figures 1-3 and Figures 10-13, The transmission structure is used to transmit the power of the crane to drive the external spline tube 16 to rotate. The transmission structure includes a load-bearing plate 4, which is fixedly connected to the inner wall of the support beam 2. A second internal spline tube 5 is installed through the load-bearing plate 4, and the second internal spline tube 5 is rotationally matched with the load-bearing plate 4. A spline shaft 6 is slidably matched inside the second internal spline tube 5. An electric cylinder 7 is fixedly connected to the bottom of the support beam 2, and the output end of the electric cylinder 7 is fixedly connected with a bearing seat 8. The spline shaft 6 is rotatably connected inside the bearing seat 8, and the end of the spline shaft 6 is slidably matched inside the external spline tube 16. A plurality of slots 17 are equally spaced on the outer wall of the end of the spline shaft 6. A fixing ring 19 and a rotating ring 20 are arranged inside the external spline tube 16. The fixing ring 19 is fixedly connected with the external spline tube 16, and the rotating ring 20 is rotationally matched with the external spline tube 16. A plurality of insertion blocks 18 are fixedly connected to one end face of the rotating ring 20, and the insertion blocks 18 are slidably matched inside the slots 17. A plurality of sliding blocks 22 are equally spaced and fixedly connected to the other end face of the rotating ring 20. A plurality of fixing blocks 21 are equally spaced and fixedly connected to the end face of the fixing ring 19. A groove is formed between two adjacent fixing blocks 21, and the sliding blocks 22 are slidably matched inside the groove.

[0045] Before rotating the outrigger 26 by operating the operating lever of the crane, start the electric cylinder 7, and drive the spline shaft 6 to axially move through the electric cylinder 7 so that the spline shaft 6 is inserted into the external spline tube 16.

[0046] During the process of the spline shaft 6 being inserted into the external spline tube 16, first, the sharp head of the insertion block 18 will be inserted into the slot 17 on the surface of the spline shaft 6 until both sides of the insertion block 18 abut against the inner wall of the slot 17. During the process of the insertion block 18 entering the slot 17, the insertion block 18 may rotate. Thus, the sliding block 22 on the rotating ring 20 can slide inside the groove, enabling the insertion block 18 to rotate freely within a certain range.

[0047] After the insertion block 18 completely enters the slot 17, the operator operates through the operating lever, and the generated power will cause the second internal spline tube 5 to rotate. The rotation of the second internal spline tube 5 drives the spline shaft 6 to rotate. The rotation of the spline shaft 6 will drive the rotating ring 20 to rotate through the insertion block 18. The rotation of the rotating ring 20 will cause the sliding block 22 to slide a certain distance inside the groove. When the sliding block 22 slides until it abuts against the fixing block 21, the rotating ring 20 will drive the external spline tube 16 to start rotating through the fixing ring 19, so as to rotate the outrigger 26 and thus adjust the angle of the outrigger 26.

[0048] Working principle and working state:

[0049] Before rotating the outrigger 26 by operating the operating lever of the crane, start the electric cylinder 7, and drive the spline shaft 6 to axially move through the electric cylinder 7 so that the spline shaft 6 is inserted into the external spline tube 16.

[0050] During the process of inserting the spline shaft 6 into the external spline tube 16, first of all, the sharp head of the inserting block 18 will insert into the slot 17 on the surface of the spline shaft 6 until both sides of the inserting block 18 abut against the inner wall of the slot 17. During the process of the inserting block 18 entering the slot 17, the inserting block 18 may rotate. Thus, the sliding block 22 on the rotating ring 20 can slide in the groove, enabling the inserting block 18 to rotate freely within a certain range.

[0051] After the inserting block 18 completely enters the slot 17, the staff operates through the operating rod, and the generated power will cause the second internal spline tube 5 to rotate. The rotation of the second internal spline tube 5 drives the spline shaft 6 to rotate. The rotation of the spline shaft 6 will drive the rotating ring 20 to rotate through the inserting block 18. The rotation of the rotating ring 20 will cause the sliding block 22 to slide a certain distance in the groove. When the sliding block 22 slides until it abuts against the fixed block 21, the rotating ring 20 will drive the external spline tube 16 to start rotating through the fixed ring 19, so as to rotate the support leg 26, thereby adjusting the angle of the support leg 26.

[0052] The action of the support leg 26 flipping is used to switch the state of the support leg, enabling the support leg 26 to switch between the storage state and the working state, where:

[0053] Working state: As Figure 1 and Figure 2 shown, in the working state, the eccentric wheel 13 rotates on the guiding block 15 until the support leg 26 is vertically downward. At this time, the eccentric wheel 13 rotates to the top and abuts against the vertex of the inner circle of the limiting block 23, and the bottom of the support leg 26 contacts the ground to provide support force for the crane.

[0054] Storage state: When the crane is moving, the support leg 26 will enter the storage state. In the storage state, the eccentric wheel 13 rotates on the guiding block 15 until the support leg 26 is vertically upward. At this time, the eccentric wheel 13 no longer contacts the inner circle of the limiting block 23, and the support leg 26 is completely supported by the sliding block 11 to overcome the gravity. The sliding block 11 floats in the sliding groove 10 under the elastic force of multiple buffer springs 12. In this state, when the crane passes through a bumpy road during the moving process, the amplitude generated by the vibration of the support leg 26 in the vertical direction will act on the buffer springs 12 through the sliding block 11, and the buffer springs 12 will buffer and protect the support leg 26;

[0055] Moreover, since the guiding block 15 is in interference fit in the guiding groove 14, under the action of the friction force between the two, the eccentric wheel 13 will not rotate randomly on the guiding block 15.

[0056] Compared with the prior art in which the outrigger 26 is rigidly connected to the crane, for the outrigger flipping structure of the crane provided by the present invention, the outrigger 26 in the retracted state is elastically connected to the crane through the buffer spring 12, and the buffer spring 12 is used to buffer and protect the outrigger 26, so as to reduce the influence of vibration during the movement of the crane on the outrigger 26, reduce the rigid impact received by the outrigger 26, so as to reduce the wear rate of each component of the outrigger 26 and extend the service life of the outrigger 26.

[0057] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes should be covered within the protection scope of the present invention.

Claims

1. A crane outrigger flipping structure, characterized in that Comprising: An installation plate (9), which is vertically fixed to the end of a support beam (2), and a chute (10) is provided in the middle of the installation plate (9); A slider (11) with a through hole in the middle, the slider (11) is arranged in the chute (10), and the chute (10) accommodates the vertical sliding of the slider (11); A plurality of buffer springs (12), the buffer springs (12) are located in the chute (10) and are vertically fixed on the upper and lower sides, and one end of the buffer spring (12) is connected to the slider (11) so that the slider (11) is suspended in the chute (10); An eccentric wheel (13) and a plurality of guide blocks (15), the guide blocks (15) are fixedly connected to the outer wall of the slider (11), and the plurality of guide blocks (15) are on the same circumference. A circular guide groove (14) is provided on the end face of one end of the eccentric wheel (13), and the guide block (15) is in sliding fit with the guide groove (14) so that the eccentric wheel (13) rotates on the guide block (15). A connecting structure for a support leg (26) is provided on the end face of the other end of the eccentric wheel (13); And an arc-shaped limiting block (23), the limiting block (23) is fixed on the outer wall of the installation plate (9), and when the outer circle of the eccentric wheel (13) rotates to the highest point, it will abut against the inner circle of the limiting block (23).

2. The crane outrigger flipping structure according to claim 1, characterized in that, The connecting structure includes an external spline tube (16), the external spline tube (16) is fixedly connected to the end face of the eccentric wheel (13), a first internal spline tube (24) is sleeved outside the external spline tube (16), and one end of the support leg (26) is fixedly connected to the outer wall of the first internal spline tube (24). A fastening bolt (25) is in threaded fit in the port of the external spline tube (16) to limit the first internal spline tube (24) to prevent axial movement of the first internal spline tube (24).

3. The crane outrigger flipping structure according to claim 2, characterized in that, The guide block (15) is made of an elastic material, which has the ability of elastic deformation, and the guide block (15) is in interference fit in the guide groove (14).

4. The crane outrigger flipping structure according to claim 3, wherein, A housing (1) is sleeved outside the support beam (2), and the housing (1) is fixed on the crane chassis to accommodate the horizontal sliding of the support beam (2).

5. The crane outrigger flipping structure according to claim 4, characterized in that, A transmission structure is provided in the support beam (2) to drive the external spline tube (16) to rotate. The transmission structure includes a load-bearing plate (4), the load-bearing plate (4) is fixedly connected to the inner wall of the support beam (2), a second internal spline tube (5) is installed through the load-bearing plate (4), and the second internal spline tube (5) is rotatably fitted with the load-bearing plate (4). A spline shaft (6) is slidably fitted in the second internal spline tube (5), and the end of the spline shaft (6) is slidably fitted inside the external spline tube (16).

6. The crane outrigger flipping structure according to claim 1, characterized in that, A plurality of slots (17) are equally spaced on the outer wall of the end of the spline shaft (6). A fixing ring (19) and a rotating ring (20) are provided inside the external spline tube (16). The fixing ring (19) is fixedly connected to the external spline tube (16), and the rotating ring (20) is rotatably fitted with the external spline tube (16). A plurality of insertion blocks (18) are fixedly connected to the end face of one end of the rotating ring (20), and the insertion blocks (18) are slidably fitted in the slots (17).

7. The crane outrigger flipping structure according to claim 6, characterized in that, A plurality of sliding blocks (22) are fixedly connected at equal intervals on the other end face of the rotating ring (20). Fixed blocks (21) are fixedly connected at equal intervals on the end face of the fixed ring (19). A groove is formed between two adjacent fixed blocks (21), and the sliding blocks (22) are slidably fitted in the grooves.

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