A cable crane

Abstract

The present invention discloses a cable crane, which includes a traveling truss, a body, a motor, a cable, a self-rotating rod, a rotating member, a fixing ring, a wedge block, a movable plate, a rotating plate, a pressing member, and a switching member; when the hook is lowered, the motor is started, and through the rotating member, the pressing member makes a reciprocating rotation. The pressing member presses the wedge block on one of the fixing rings, causing the fixing ring to rotate with a gap, and being stably fixed in cooperation with the stabilizing member, and the rotation direction is always the same, repeating in sequence, so that the hook under the cable is smoothly lowered at intervals, avoiding the hook being lowered or lifted too fast, which may cause potential safety hazards. The intermittent movement in the present invention has a small and continuous interval, and has little impact on the hoisting efficiency; when the hook is lifted, through the switching member, the rotation direction of the motor remains unchanged, so that the other fixing ring rotates with a gap, and the rotation direction is opposite, enabling the hook under the cable to be smoothly lifted at intervals. This application does not require switching the rotation direction of the motor, reducing the wear on the bearings of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of crane structures, and particularly to a cable crane. Background Art

[0002] The cable crane can directly move on the ground track or the main cable. Compared with the traditional lifting crane, it has the effects of strong mobility and strong applicability.

[0003] For the existing cable crane, the lowering or lifting of the hook is generally controlled by the forward and reverse rotation of the motor. The frequent forward and reverse rotation of the motor will damage the components of the motor. The most easily damaged component is the bearing of the motor. Moreover, there is no structure for a short stop with a set gap during the lowering or lifting of the cable, resulting in too fast lowering or lifting speed. Although the efficiency is improved to a certain extent, the improvement of the efficiency is relatively low, increasing the potential safety hazard.

[0004] Therefore, we propose a cable crane. Summary of the Invention

[0005] The purpose of the present invention is to provide a cable crane to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides a cable crane, including a walking truss, a machine body is provided on the walking truss, and a motor and a cable passing through the machine body are provided inside the machine body;

[0007] It further includes a self-rotating rod, a rotating member, and two fixedly connected fixing rings. The cable is wound around the self-rotating rod. A plurality of wedge-shaped blocks with opposite directions are respectively fixedly connected to the two fixing rings. The output shaft of the motor is rotatably connected with a movable plate cooperating with the cable through the rotating member. A rotating plate is movably inserted at the end of the movable plate. A pressing member cooperating with the wedge-shaped block is rotatably connected to the rotating plate. The self-rotating rod is inserted and cooperated with the middle of the fixing ring. A switching member is further provided inside the machine body to drive the two fixing rings to move, so that the pressing member switches positions on the two fixing rings.

[0008] Preferably, the pressing member includes a rotating shaft rotatably connected to the rotating plate. Two ratchet teeth that rotate with each other are respectively provided on the rotating shaft through two first torsion spring rods. The length of one of the ratchet teeth is less than that of the other ratchet tooth. The ratchet teeth are in pressing cooperation with the wedge-shaped block. A limiting member is provided in the middle of the fixing ring.

[0009] Preferably, the limiting member includes a fixing plate fixedly connected to the inside of the machine body. The self-rotating rod is rotatably connected to the fixing plate and the rotating plate. A plurality of connecting plates are fixedly connected to the inner wall of the fixing ring. A sliding groove slidably cooperating with the self-rotating rod is opened in the middle of the connecting plate.

[0010] Preferably, the rotating member includes a telescopic rod with a compression member inside. One end of the telescopic rod is fixedly connected to the output shaft of the motor, and the other end of the telescopic rod is fixedly connected to a connecting plate. The other end of the connecting plate is rotatably connected to the movable plate. A plug rod penetrating the movable plate is fixedly connected to the rotating plate. A stabilizing member for maintaining the stability of the fixed ring is also provided in the machine body.

[0011] Preferably, the stabilizing member includes two pressure-receiving plates rotatably connected to the machine body. The end of the pressure-receiving plate has an inclined surface that is in pressure contact with the wedge-shaped block, and the two pressure-receiving plates are arranged in opposite inclined directions.

[0012] Preferably, the switching member includes a cooperating member and a telescopic cylinder fixedly connected to the machine body. The output end of the telescopic cylinder is fixedly connected to a rotating block rotatably connected to the connecting plate. The cooperating member is used to drive the pressure-receiving plate to move synchronously when switching and moving the fixed ring.

[0013] Preferably, the cooperating member includes a limiting ring fixedly connected to the edge of the fixed ring. The pressure-receiving plate is located between the two limiting rings. A rectangular rod is inserted into the machine body, and a second torsion spring rod is provided between the rectangular rod and the pressure-receiving plate.

[0014] Preferably, two limiting disks are fixedly connected to the self-rotating rod. The cable is located between the two limiting disks. A plurality of avoiding grooves are formed in the limiting disk close to the movable plate. A brush cooperating with the cable is fixedly connected to the movable plate, and the brush moves in the avoiding grooves.

[0015] Preferably, a first elastic pulling member is hung between the movable plate and the rotating plate. A limiting groove is formed on the outer surface of the sleeve rod of the telescopic rod, and a limiting sliding plate slidably cooperating with the limiting groove is fixedly connected to the sleeve of the telescopic rod.

[0016] Preferably, a second elastic pulling member is hung between the movable plate and the connecting plate to ensure the reciprocating movement of the movable plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] When the lifting hook is lowered, the motor is started. Through the rotating member, the rotating plate makes a reciprocating rotation at a certain angle, so that the pressing member makes a reciprocating rotation. The pressing member presses the wedge-shaped block on one of the fixed rings, causing the fixed ring to rotate with a gap. The stabilizing member cooperates to fix it, and the rotating direction is always the same. Repeating this process in sequence, the lifting hook under the cable is lowered smoothly at intervals, avoiding the lifting hook being lowered or lifted too fast, which may cause potential safety hazards. Moreover, the interval movement in this application is small and continuous, having little impact on the lifting efficiency.

[0019] When the lifting hook is lifted, through the switching member, the rotation direction of the motor remains unchanged, and the pressing member acts on the wedge block on the other fixed ring. Since the inclination direction of this wedge block is opposite to that of the wedge block on one fixed ring, the rotation of the gap of the other fixed ring is caused, and the rotation direction is opposite. This process repeats in sequence, so that the lifting hook under the cable is lifted smoothly at intervals. In this application, there is no need to switch the rotation direction of the motor, reducing the wear of the motor bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the split structure of the walking truss and the body of the present invention;

[0022] Figure 3 It is a schematic diagram of the split of the internal structure of the body, the body and the motor of the present invention;

[0023] Figure 4 It is an enlarged schematic diagram of the internal structure of the body of the present invention;

[0024] Figure 5 It is a side view schematic diagram of the internal structure of the body of the present invention;

[0025] Figure 6 It is a top view schematic diagram of the internal structure of the body of the present invention;

[0026] Figure 7 It is a schematic diagram of the split of the connecting plate, the movable plate and the second elastic tension member of the present invention;

[0027] Figure 8 It is a schematic diagram of the split of the rotating block and the fixed ring of the present invention;

[0028] Figure 9 It is a schematic diagram of the split of the movable plate and the insertion rod of the present invention;

[0029] Figure 10 It is a schematic diagram of the split of the self-rotating rod and the limiting disk of the present invention;

[0030] Figure 11 It is a left side view schematic diagram of the split structure of the self-rotating rod, the limiting disk and the movable plate of the present invention;

[0031] Figure 12 It is a schematic diagram of the split of the self-rotating rod, the rotating plate and the fixed plate of the present invention;

[0032] Figure 13 It is a schematic diagram of the split structure of the pressure plate and the wedge block of the present invention;

[0033] Figure 14 It is a schematic diagram of the split structure of the two fixed rings of the present invention;

[0034] Figure 15 This is a schematic diagram of the split structure of the two ratchets, the pressure plate and the wedge block of the present invention.

[0035] In the figure: 1, traveling truss; 2, body; 3, motor; 4, cable; 5, self-rotating rod; 6, fixed ring; 7, wedge block; 8, movable plate; 9, rotating plate; 10, rotating shaft; 11, ratchet; 12, fixing plate; 13, connecting plate; 14, sliding groove; 15, telescopic rod; 16, connecting plate; 17, inserting rod; 18, pressure plate; 19, telescopic cylinder; 20, rotating block; 21, limiting ring; 22, rectangular rod; 23, limiting disc; 24, avoiding groove; 25, brush; 26, first elastic tension member; 27, second elastic tension member. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-15 , the present invention provides a cable crane, including a traveling truss 1, a body 2 is arranged on the traveling truss 1, a motor 3 and a cable 4 passing through the body 2 are arranged in the body 2;

[0038] It further includes a self-rotating rod 5, a rotating member and two fixedly connected fixed rings 6, the cable 4 is wound around the self-rotating rod 5, a plurality of wedge blocks 7 with opposite directions are respectively fixedly connected to the two fixed rings 6, the output shaft of the motor 3 is rotationally connected with a movable plate 8 cooperating with the cable 4 through the rotating member, the end of the movable plate 8 is movably inserted with a rotating plate 9, and a pressing member cooperating with the wedge block 7 is rotationally connected to the rotating plate 9. The self-rotating rod 5 is inserted and cooperated with the middle of the fixed ring 6, and a switching member for driving the two fixed rings 6 to move so that the pressing member switches positions on the two fixed rings 6 is further arranged in the body 2;

[0039] When the hook under the cable 4 needs to be lowered: the motor 3 rotates, through the rotating member, the rotating plate 9 makes a reciprocating rotation at a certain angle, so that the pressing member makes a reciprocating rotation. The pressing member presses the wedge block 7 on one of the fixed rings 6, so that the fixed ring 6 rotates with a gap and is fixedly cooperated by the stabilizing member, and the rotation direction is always the same. Repeating in turn, so that the hook under the cable 4 is lowered at intervals smoothly;

[0040] The hook under the cable 4 needs to be lifted: Through the switching part, the two fixing rings 6 are moved, while the position of the pressing part remains unchanged, so that one fixing ring 6 is disengaged from contact with the pressing part, and the wedge block 7 on the other fixing ring 6 is pressed against the pressing part. The motor 3 continues to rotate, and the reciprocating pressing part acts on the wedge block 7 on the other fixing ring 6. Since the inclination direction of this wedge block 7 is opposite to that of the wedge block 7 on one fixing ring 6, the other fixing ring 6 rotates with a gap and in the opposite direction. Repeating this process in turn, the hook under the cable 4 is lifted smoothly at intervals;

[0041] In this application, the rotation clockwise direction of the motor 3 is always the same and does not require forward and reverse rotation.

[0042] The pressing part includes a rotating shaft 10 rotatably connected to the rotating plate 9. Two ratchet teeth 11 that are rotatably matched with each other are respectively arranged on the rotating shaft 10 through two first torsion spring rods. The length of one ratchet tooth 11 is less than that of the other ratchet tooth 11. The ratchet teeth 11 are in pressing fit with the wedge block 7, and a limiting part is arranged in the middle of the fixing ring 6;

[0043] The rotating plate 9 that makes reciprocating rotation drives the two ratchet teeth 11 to make synchronous reciprocating rotation. The ratchet teeth 11 are initially in the upper position. The ratchet teeth 11 press against one of the wedge blocks 7 and make a circular rotation, driving the fixing ring 6 to rotate half a turn. At this time, the ratchet teeth 11 move to the lower position, and the ratchet teeth 11 contact the pressing plate 18, causing the pressing plate 18 to rotate, so that one of the wedge blocks 7 that moves to the lower position passes over the rotating pressing plate 18. Then the ratchet teeth 11 reset and rotate to the upper position, and the reset ratchet teeth 11 release the pressure on the pressing plate 18, and the pressing plate 18 resets, thus restricting one of the wedge blocks 7 and preventing the wedge block 7 from rotating back and the fixing ring 6 from rotating back;

[0044] During the process of the ratchet teeth 11 resetting and rotating to the upper position, the two ratchet teeth 11 pass over the other wedge block 7 (at this time the other wedge block 7 is in the upper position), causing the ratchet teeth 11 to press against the other wedge block 7, facilitating the next reciprocating movement of the two ratchet teeth 11 and driving the fixing ring 6 to rotate in the same clockwise direction again, so that the cable 4 is retracted and released stably at intervals.

[0045] The limiting part includes a fixing plate 12 fixedly connected to the inside of the machine body 2. The self-rotating rod 5 is rotatably connected to the fixing plate 12 and the rotating plate 9. A plurality of connecting plates 13 are fixedly connected to the inner wall of the fixing ring 6. A sliding groove 14 that is slidably matched with the self-rotating rod 5 is opened in the middle of the connecting plate 13. The end of the self-rotating rod 5 is slidably connected to the sliding groove 14, facilitating the connecting plate 13 to slide along the self-rotating rod 5 when the telescopic cylinder 19 drives the fixing ring 6 and the connecting plate 13 to move and switch, and does not affect the rotation of the connecting plate 13 and the fixing ring 6 to drive the self-rotating rod 5 to rotate.

[0046] The rotating member includes a telescopic rod 15 with a compression member inside. One end of the telescopic rod 15 is fixedly connected to the output shaft of the motor 3, and the other end of the telescopic rod 15 is fixedly connected to a connecting plate 16. The other end of the connecting plate 16 is rotatably connected to the movable plate 8. A plug rod 17 passing through the movable plate 8 is fixedly connected to the rotating plate 9. A stabilizing member for maintaining the stability of the fixed ring 6 is also provided in the machine body 2;

[0047] The motor 3 rotates, driving the telescopic rod 15 to rotate, thereby causing the connecting plate 16 to perform circular rotation (with the axis of the telescopic rod 15 as the center of rotation). Under the action of the second elastic pulling member 27, the rotation amplitude of the movable plate 8 is restricted, so that the movable plate 8 performs reciprocating motion at a certain angle, and then drives the rotating plate 9 to perform reciprocating rotation at a certain angle through the plug rod 17. The self-rotating rod 5 rotates, and the self-rotating rod 5 rotates with the fixed ring 6, so that the cable 4 is continuously wound;

[0048] By restricting the lengths of the connecting plate 16 and the movable plate 8 and cooperating with the second elastic pulling member 27, the two ratchet teeth 11 are prevented from bypassing the topmost and bottommost positions of the fixed ring 6, thus ensuring the reciprocating rotation of the rotating plate 9.

[0049] The stabilizing member includes two pressure-receiving plates 18 rotatably connected to the machine body 2. The end portions of the pressure-receiving plates 18 are inclined surfaces that are in pressure-contact cooperation with the wedge-shaped blocks 7. The two pressure-receiving plates 18 are arranged with opposite inclination directions. When the two ratchet teeth 11 at the upper position perform reciprocating rotation, they first drive a wedge-shaped block 7 (at the upper position) of the fixed ring 6 to move, so that the wedge-shaped block 7 performs circular rotation. When the wedge-shaped block 7 moves to the lower position, it comes into pressure-contact with the pressure-receiving plate 18, causing the pressure-receiving plate 18 to rotate to facilitate the passage of the wedge-shaped block 7. After the wedge-shaped block 7 passes through the pressure-receiving plate 18, under the action of the second torsion spring rod, the pressure-receiving plate 18 rotates back, fits against the fixed ring 6, and presses against the wedge-shaped block 7 to prevent the fixed ring 6 from rotating back. When the other wedge-shaped block 7 moves to the upper position and the two reciprocatingly rotating ratchet teeth 11 pass over the other wedge-shaped block 7 and press against the wedge-shaped block 7, it is convenient to rotate the fixed ring 6 again.

[0050] The switching member includes a cooperating member and a telescopic cylinder 19 fixedly connected to the machine body 2. The output end of the telescopic cylinder 19 is fixedly connected to a rotating block 20 that is rotatably connected to the connecting plate 13. The cooperating member is used to drive the pressure-receiving plate 18 to move synchronously when switching the movement of the fixed ring 6;

[0051] When it is necessary to reverse the operation of the hook at the bottom of the cable 4 (for example, when it is necessary to lift upward after the hook is below), at this time, the two ratchets 11 cooperate with the wedges 7 on the fixing ring 6 close to the cable 4. The output end of the telescopic cylinder 19 is telescoped by the remote control, so that the positions of the two fixing rings 6 move synchronously. The two pressure plates 18 move synchronously with the fixing rings 6. The two fixing rings 6 move relative to the two ratchets 11, so that the two ratchets 11 cooperate with the two wedges 7 on the fixing ring 6 in the direction away from the cable 4. When the motor 3 continues to rotate, the two ratchets 11 act on the wedges 7 reciprocally, so that the cable 4 rotates and the hook is lifted.

[0052] The fitting includes a limiting ring 21 fixedly connected to the edge of the fixing ring 6. The pressure plate 18 is located between the two limiting rings 21. A rectangular rod 22 is inserted into the body 2. A second torsion spring rod is provided between the rectangular rod 22 and the pressure plate 18. Under the telescopic action of the output end of the telescopic cylinder 19 (which can be a cylinder or an electric telescopic rod), the fixing ring 6 moves. While the fixing ring 6 moves, under the action of the limiting ring 21, the pressure plate 18 that does not rotate temporarily within the limiting ring 21 moves synchronously, the second torsion spring rod moves synchronously, and the rectangular rod 22 moves along the body 2. During the whole process, the rectangular rod 22 does not rotate relative to the body 2 at an angle.

[0053] Two limiting discs 23 are fixedly connected to the self-rotating rod 5. The cable 4 is located between the two limiting discs 23. A plurality of avoiding grooves 24 are formed in the limiting disc 23 close to the movable plate 8. A brush 25 that cooperates with the cable 4 is fixedly connected to the movable plate 8. The brush 25 in this application has a certain elasticity, and the long length of the brush 25 is also convenient for replacement. The brush 25 moves within the avoiding groove 24, and the movable plate 8 makes a reciprocating movement at a certain angle relative to the limiting disc 23, so as to drive the brush 25 to move along the limiting disc 23. The brush 25 with a certain elasticity enters the avoiding groove 24, so that the brush 25 contacts the coiled and moving cable 4, simply cleaning the dust on the cable 4 and avoiding the accumulation of dust.

[0054] A first elastic pulling member 26 is hung between the movable plate 8 and the rotating plate 9. A limiting groove is formed on the outer surface of the sleeve of the telescopic rod 15. A limiting sliding plate that is slidably matched with the limiting groove is fixedly connected to the sleeve of the telescopic rod 15. Through the limitation of the limiting sliding plate and the limiting groove, the motor 3 drives the connecting plate 16 to make a circular motion through the telescopic rod 15. At the same time, under the action of the first elastic pulling member 26, it does not affect the movement of the connecting plate 16 close to or away from the cable 4, which is convenient for the movable plate 8 to drive the rotating plate 9 to make a continuous reciprocating movement on the one hand, and drive the brush 25 to act on the cable 4 along the limiting disc 23 on the other hand.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable crane, comprising: A walking truss, wherein a machine body is arranged on the walking truss, and a motor and a cable passing through the machine body are arranged in the machine body; The invention is characterized in that it also includes: a self-rotating rod, a rotating member and two mutually connected and fixed fixing rings, the cable is wound around the self-rotating rod, and the two fixing rings are respectively fixedly connected with a plurality of wedge-shaped blocks arranged in opposite directions, the output shaft of the motor is rotatably connected with a movable plate matched with the cable through the rotating member, the end of the movable plate is movably plugged with a rotating plate, the rotating plate is rotatably connected with a pressing member matched with the wedge block, the self-rotating rod is plugged and matched with the middle part of the fixing ring, and the machine body is also provided with a switching member that drives the two fixing rings to move so that the pressing member switches positions on the two fixing rings; The pressing member comprises a rotating shaft rotatably connected to the rotating plate, and two ratchet teeth rotatably matched with each other are respectively arranged on the rotating shaft through two first torsion spring rods, wherein the length of one of the ratchet teeth is smaller than the length of the other ratchet teeth, and the ratchet teeth are pressed and matched with the wedge block, and a limiting member is arranged in the middle of the fixing ring; The position-limiting member comprises a fixed plate connected and fixed to the body, the self-rotating rod is rotatably connected to the fixed plate and the rotating plate, a plurality of connecting plates are fixedly connected to the inner wall of the fixed ring, and a sliding groove is provided in the middle of the connecting plate to slide with the self-rotating rod; The rotating part includes a telescopic rod with a compression part inside, one end of the telescopic rod is fixedly connected to the output shaft of the motor, the other end of the telescopic rod is fixedly connected to a connecting plate, the other end of the connecting plate is rotatably connected to the movable plate, the rotating plate is fixedly connected to an insertion rod that passes through the movable plate, and a stabilizing part for maintaining the stability of the fixed ring is also provided in the machine body.

2. The cable crane according to claim 1, characterized in that: The stabilizing member comprises two pressing plates rotatably connected to the machine body, the ends of the pressing plates are inclined surfaces pressed against the wedge blocks, and the two pressing plates are arranged in opposite inclined directions.

3. The cable crane according to claim 2, characterized in that: The switching member includes a matching member and a telescopic cylinder fixedly connected to the machine body, the output end of the telescopic cylinder is fixedly connected to a rotating block rotatably connected to the connecting plate, and the matching member is used to drive the pressure plate to move synchronously when switching the movable fixed ring.

4. The cable crane according to claim 3, characterized in that: The matching piece includes a limiting ring connected and fixed to the edge of the fixing ring, the pressing plate is located between the two limiting rings, a rectangular rod is inserted in the body, and a second torsion spring rod is provided between the rectangular rod and the pressing plate.

5. The cable crane according to claim 1, characterized in that: Two limit plates are fixedly connected to the rotating rod, the cable is located between the two limit plates, a plurality of avoidance grooves are provided on the limit plate close to the movable plate, a brush cooperating with the cable is fixedly connected to the movable plate, and the brush moves in the avoidance groove.

6. The cable crane according to claim 1, characterized in that: A first elastic pull piece is hung between the movable plate and the rotating plate, a limiting groove is arranged on the outer surface of the sleeve rod of the telescopic rod, and a limiting slide plate which is slidably matched with the limiting groove is fixedly connected inside the sleeve of the telescopic rod.

7. The cable crane according to claim 1, characterized in that: A second elastic puller is hung between the movable plate and the connecting plate.

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