A port ship crane

Abstract

The present application relates to the technical field of crane, especially to a kind of crane for port ship, including pedestal, the upper surface of the pedestal is equipped with rotating groove, rotating seat is rotatably connected in the rotating groove by bearing, and hoisting mechanism is arranged above the rotating seat;The hoisting mechanism includes door-shaped rack, the rack is fixedly connected with the upper surface of rotating seat, hoisting motor is fixedly connected with the side wall of the rack by support, the output shaft of the hoisting motor is rotatably connected with the side wall of the rack by bearing, the output shaft of the hoisting motor is fixedly connected with rotating cylinder, and L-shaped pipe is fixedly connected in the side wall of the rotating cylinder.The advantages are that the crane of the present application can be automatically fixed with the ground when hoisting goods, to ensure the stability and safety of the crane during hoisting, and the size of the fixing force can be automatically adjusted according to the hoisted goods, while preventing the goods from falling, further improving safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crane technology, in particular to a port ship crane. BACKGROUND

[0002] At present, the existing small mobile crane is provided with a lockable universal wheel, which is locked when pushed to the required hoisting position, so that the hoisting of goods can be carried out. However, the locked universal wheel cannot guarantee the stability of the crane. When hoisting some light goods, the crane can remain stable, but when hoisting a heavy good, the crane may tend to fall, which is less safe. In order to stabilize the crane, it is necessary to fix the crane at the hoisting position. The advantage of the small mobile crane is flexibility and convenience. If the crane needs to be fixed every time, the small mobile crane will lose its flexible feature. SUMMARY

[0003] The present application relates to the field of crane technology, in particular to a port ship crane.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A port ship crane, comprising a base, a rotating groove is formed on the upper surface of the base, a rotating seat is rotatably connected in the rotating groove through a bearing, and a hoisting mechanism is arranged above the rotating seat;

[0006] The hoisting mechanism comprises a door-shaped rack, the rack is fixedly connected with the upper surface of the rotating seat, a hoisting motor is fixedly connected with the side wall of the rack through a support, the output shaft of the hoisting motor is rotatably connected with the side wall of the rack through a bearing, the output shaft of the hoisting motor is fixedly connected with a rotating cylinder, an L-shaped pipe is fixedly connected with the side wall of the rotating cylinder, a high-strength hose is fixedly connected with one end of the L-shaped pipe outside the rotating cylinder, a fixed block is fixedly connected with the end of the high-strength hose away from the L-shaped pipe, a cavity is formed in the fixed block, the high-strength hose extends into the cavity, an I-shaped block is sealingly and slidably connected with the cavity, a plurality of first springs are fixedly connected between the I-shaped block and the inner bottom wall of the cavity, and a main hook is fixedly connected with the lower surface of the I-shaped block.

[0007] Further, the hoisting mechanism further comprises a plurality of grooves and a plurality of communication cavities and a transfer cavity formed in the base, the communication cavities are communicated with the transfer cavity, a sliding plate is sealingly and slidably connected in the grooves, a plurality of suction cups are fixedly connected to the lower surface of the base and communicated with the corresponding grooves, a fixed tube is fixedly connected to the frame and the rotating base, the fixed tube is rotatably connected to the side wall of the rotating cylinder through a bearing and extends into the rotating cylinder, the fixed tube is rotatably connected to the base through a bearing and extends into the transfer cavity, and the grooves, the transfer cavity, the rotating cylinder and the cavity are filled with hydraulic oil.

[0008] Further, a pressure relief valve is arranged in each of the communication cavities, a plurality of walking mechanisms are arranged on the side wall of the base, a horizontal plate is fixedly connected to the side wall of the frame, a guide wheel is fixedly connected to the top wall of the frame and the lower surface of the horizontal plate, the high-strength hose abuts against the guide wheel, and two annular plates are fixedly connected to the side wall of the rotating cylinder.

[0009] Further, the rotating base is in interference fit with a gear ring in the rotating groove, a steering motor is fixedly connected to the upper surface of the base through a support, the output shaft of the steering motor extends into the rotating groove and is in interference fit with a driving gear, and the driving gear is in mesh with the gear ring.

[0010] Further, the fixed block is provided with an anti-falling mechanism, the anti-falling mechanism comprises two functional grooves formed in the fixed block, a rotating shaft is rotatably connected to the inner side wall of the functional groove through a bearing, the rotating shaft is in interference fit with a rope wheel and a locking gear, a torsion spring is arranged between the rope wheel and the inner side wall of the functional groove, a steel wire rope is arranged on the rope wheel, the steel wire rope is fixedly connected with a secondary hook, an electric push rod is embedded in the inner side wall of the functional groove, and the output end of the electric push rod is fixedly connected with a locking block.

[0011] Further, the I-shaped block is a hollow mechanism, the anti-falling mechanism further comprises a counterweight, the counterweight is slidably connected in the I-shaped block, a follower plate is slidably connected in the I-shaped block, a plurality of second springs are fixedly connected between the follower plate and the bottom wall of the I-shaped block, a button switch is fixedly connected to the bottom wall of the I-shaped block, and the button switch and the electric push rod are electrically connected through wires.

[0012] The present application has the following advantages:

[0013] 1. During the hoisting process, the hoisted goods are lifted by hooks, causing the I-shaped block to slide down. As the I-shaped block slides down, hydraulic oil in the groove is drawn into the cavity through high-strength hoses and fixing pipes, which causes the sliding plate to slide up. Then, the upward sliding of the sliding plate draws air from the suction cup into the groove, creating negative pressure in the suction cup. The suction cup fixes the base to the ground, effectively securing the crane and preventing it from tipping over during the hoisting process, making the crane safer to use.

[0014] 2. The weight of the goods themselves generates suction in the suction cup to fix the crane in place. The heavier the goods being lifted, the stronger the suction generated by the suction cup. This allows the crane to automatically adjust the fixing strength of the base according to the weight of the goods being lifted, further improving the stability of the crane.

[0015] 3. During the hoisting process, suction force is generated in the suction cup to fix the base to the ground. When no goods are being hoisted, suction force is not generated in the suction cup. The position of the crane can be moved quickly through the traveling mechanism, ensuring the stability of the crane while maintaining the flexibility of the small mobile crane.

[0016] 4. During the hoisting process, the anti-fall mechanism ensures that if the cargo becomes detached or the main hook falls off, the change in the state of the counterweight will trigger a switch, which will activate the electric push rod. The locking block will then lock the locking gear, allowing the secondary hook to continue holding the cargo. This prevents the cargo from falling directly and injuring the operators, further improving the safety of the crane. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a port ship crane proposed in this invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0019] Figure 3 for Figure 1 Enlarged view of point B in the image;

[0020] Figure 4 for Figure 3 Enlarged view of point C in the image;

[0021] Figure 5 for Figure 1 Partial cross-sectional view at DD in the middle;

[0022] Figure 6 for Figure 1 Cross-sectional view at EE in the middle;

[0023] Figure 7 forFigure 3 Cross-sectional view at F-F in Fig. 1.

[0024] In the figure: 1 base, 2 frame, 3 cross plate, 4 rotating cylinder, 5 L-shaped pipe, 6 high-strength hose, 7 fixed block, 8 cavity, 9 I-shaped block, 10 main hook, 11 fixed pipe, 12 transfer cavity, 13 groove, 14 communication cavity, 15 sliding plate, 16 suction cup, 17 annular plate, 18 rotating seat, 19 hoisting motor, 20 first spring, 21 function groove, 22 rotating shaft, 23 rope wheel, 24 locking gear, 25 steel wire rope, 26 secondary hook, 28 counterweight, 29 follower plate, 30 second spring, 31 button switch, 32 electric push rod, 33 locking block, 34 pressure relief valve, 35 walking mechanism, 36 rotating groove, 37 gear ring, 38 steering motor, 39 drive gear, 40 guide wheel. DETAILED DESCRIPTION

[0025] Referring to Figures 1-7 A port ship crane, comprising a base 1, a rotating groove 36 is formed on the upper surface of the base 1, a rotating seat 18 is rotatably connected in the rotating groove 36 through a bearing, and a hoisting mechanism is arranged above the rotating seat 18;

[0026] The hoisting mechanism comprises a frame 2 in the shape of a door, the frame 2 is fixedly connected to the upper surface of the rotating seat 18, a hoisting motor 19 is fixedly connected to the side wall of the frame 2 through a support, the output shaft of the hoisting motor 19 is rotatably connected to the side wall of the frame 2 through a bearing, the output shaft of the hoisting motor 19 is fixedly connected to a rotating cylinder 4, and the side wall of the rotating cylinder 4 is fixedly connected to an L-shaped pipe 5, such as Figure 2As shown, the L-shaped pipe 5 is located outside the rotating cylinder 4 and is attached to the outer wall of the rotating cylinder 4, so as to ensure that the rotating cylinder 4 is in communication with the high-strength hose 6, and the rotation of the rotating cylinder 4 can also make the high-strength hose 6 coil on the outer wall. One end of the L-shaped pipe 5 fixedly connected with the high-strength hose 6, the high-strength hose 6 is made of engineering plastic, and a metal skeleton is embedded inside, so that the high-strength hose 6 can load heavy goods, and also plays a role in hydraulic oil transmission, and because of the setting of the metal skeleton, it will not be crushed during coiling, causing the volume to change. The end of the high-strength hose 6 away from the L-shaped pipe 5 is fixedly connected with a fixed block 7, the fixed block 7 is provided with a cavity 8, the high-strength hose 6 extends through the cavity 8, the cavity 8 is sealingly and slidably connected with an I-shaped block 9, a plurality of first springs 20 are fixedly connected between the I-shaped block 9 and the inner bottom wall of the cavity 8, and a main hook 10 is fixedly connected to the lower surface of the I-shaped block 9.The hoisting mechanism further comprises a plurality of grooves 13, a plurality of communication cavities 14 and a transfer cavity 12 formed in the base 1, the communication cavities 14 communicate the corresponding communication cavities 14 with the transfer cavity 12, the sliding plates 15 are sealingly and slidably connected in the grooves 13, a plurality of suction cups 16 are fixedly connected to the lower surface of the base 1, the suction cups 16 are made of relatively hard rubber material and externally glued with metal skeletons, so that the suction cups 16 have certain deformation capacity and will not be flattened by the weight of the crane, thereby ensuring that the negative pressure generated in the suction cups 16 can adsorb the crane on the ground, the suction cups 16 communicate with the corresponding grooves 13, the fixed pipe 11 is fixedly connected with the rotating base 18, the fixed pipe 11 is rotatably connected with the side wall of the rotating cylinder 4 through bearings and extends into the rotating cylinder 4, the fixed pipe 11 is rotatably connected with the base 1 through bearings and extends into the transfer cavity 12, the grooves 13, the transfer cavity 12, the rotating cylinder 4 and the cavity 8 are filled with hydraulic oil, during hoisting, the goods are hoisted by the main hook 10, the weight of the goods acts on the I-shaped block 9, so that the I-shaped block 9 slides downward, and the sliding of the I-shaped block 9 can cause the hydraulic oil in the grooves 13 to be sucked into the cavity 8 through the communication cavities 14, the transfer cavity 12 and the rotating cylinder 4 through the high-strength hose 6 and the fixed pipe 11, and as the hydraulic oil is sucked away, the sliding plates 15 in the grooves 13 slide upward, sucking the air in the corresponding suction cups 16 into the grooves 13, so that the suction cups 16 generate negative pressure, and the base 1 is fixed to the ground through the suction cups 16, avoiding the tendency of the crane to fall during hoisting, making the crane safer to use, and the suction force is applied by the weight of the goods itself, that is, the force of the main hook 10 driving the I-shaped block 9 to slide downward is the weight of the goods itself, and the force of the I-shaped block 9 sliding downward is the suction force when the suction cup 16 is fixed, that is, the size of the weight of the goods itself determines the size of the suction force of the crane and the ground, when the goods are heavy, the crane can automatically generate a larger suction force in the suction cup 16 to fix the crane on the ground, so that the crane can automatically adjust the fixing strength of the base according to the weight of the hoisted goods, further improving the stability of the crane.

[0027] It is worth mentioning that the suction cups 16 generate suction force to fix the base on the ground during hoisting, and the suction cups 16 do not generate suction force when not hoisting goods, so the position of the crane can be quickly moved through the traveling mechanism 35, ensuring the stability of the crane and the flexibility of the small mobile crane.

[0028] Each connecting cavity 14 is equipped with a pressure relief valve 34. The opening pressure of the pressure relief valve 34 is relatively small, and the pressure of the liquid is equal everywhere. Therefore, when the hydraulic oil flows, the pressure relief valve 34 will open synchronously. The main purpose of setting the pressure relief valve 34 is to make the hydraulic oil in the multiple grooves 13 flow synchronously into the transfer cavity 12, thereby making the multiple sliding plates 15 rise synchronously, and thus making the suction force generated in each suction cup 16 consistent, thereby ensuring the stability of the adsorption. The side wall of the base 1 is equipped with multiple sets of walking mechanisms 35, such as... Figure 1 As shown, the traveling mechanism 35 consists of a hydraulic cylinder and a caster wheel. When the crane needs to be moved, the hydraulic cylinder makes the caster wheel contact the ground, thus moving the crane. During lifting, the caster wheel is disengaged from the ground, allowing the suction cup 16 to contact the ground. A horizontal plate 3 is fixedly connected to the side wall of the frame 2. Guide wheels 40 are fixedly connected to the inner top wall of the frame 2 and the lower surface of the horizontal plate 3. The high-strength hose 6 abuts against the guide wheels 40. Two annular plates 17 are fixedly connected to the side wall of the rotating cylinder 4. The distance between the two annular plates 17 is exactly the outer diameter of the high-strength hose 6, thus allowing the high-strength hose 6 to coil in an orderly manner through the two annular plates 17, preventing it from becoming tangled. Figure 1 As shown, the extension direction of the high-strength hose 6 is guided by two guide wheels 40.

[0029] The rotating seat 18 has an interference fit with a gear ring 37 inside the rotating groove 36. The upper surface of the base 1 is fixedly connected to a steering motor 38 by a bracket. The output shaft of the steering motor 38 extends through the rotating groove 36 and is interference fitted with a drive gear 39. The drive gear 39 meshes with the gear ring 37. By starting the steering motor 38, the meshing of the drive gear 39 and the gear ring 37 causes the entire rotating seat 18 to rotate, thereby changing the direction of the hoisted goods and hoisting the goods to any direction.

[0030] A fall prevention mechanism is installed within the fixed block 7. This mechanism includes two functional slots 21 within the fixed block 7. A rotating shaft 22 is rotatably connected to the inner wall of each functional slot 21 via bearings. The rotating shaft 22 is interference-fitted with a rope pulley 23 and a locking gear 24. A torsion spring is installed between the rope pulley 23 and the inner wall of the functional slot 21. A steel wire rope 25 is wound around the rope pulley 23. A secondary hook 26 is fixedly connected to the steel wire rope 25. When not locked, the secondary hook 26 can be pulled out with the steel wire rope 25 and fixed at any position on the goods, thus ensuring that the two secondary hooks 26 can stably hook the goods when they are unhooked. An electric push rod 32 is embedded in the inner wall of the functional slot 21. A locking block 33 is fixedly connected to the output end of the electric push rod 32. Figure 7The locking block 33 is an arc-shaped block, and a tooth is arranged on the side close to the locking gear 24, which can be engaged with the tooth of the locking gear 24, so that the locking function of the locking gear 24 is achieved. When the anti-falling mechanism is triggered, the electric push rod 32 extends through the locking block 33 to lock the locking gear 24, so that the rope wheel 23 cannot continue to rotate, and the sub-hook 26 can hook the goods to prevent falling.

[0031] It is worth mentioning that the two sub-hooks hung on the side edges of the goods can also stabilize the goods to some extent, avoiding the left and right shaking of the goods under the action of wind force or external force during hoisting.

[0032] The I-shaped block 9 is a hollow mechanism, and the anti-falling mechanism further comprises a counterweight 28 which is slidingly connected in the I-shaped block 9. A follower plate 29 is slidingly connected in the I-shaped block 9, and a plurality of second springs 30 are fixedly connected between the follower plate 29 and the bottom wall of the I-shaped block 9. A button switch 31 is fixedly connected to the bottom wall of the I-shaped block 9, and the button switch 31 is electrically connected to the electric push rod 32 through wires. When the button switch 31 is pressed, the electric push rod 32 is energized to extend. During hoisting, if the goods are normally lowered, the upper sliding of the I-shaped block 9 is relatively gentle at this time, and the counterweight 28 slides upward together with the I-shaped block 9. When the hook is released, due to the sudden disappearance of the weight of the goods, the I-shaped block 9 will slide upward instantaneously under the elastic force of the first spring 20 and the pressure of the suction cup 16. At this time, the sudden upward sliding of the I-shaped block 9, the counterweight 28 remains in the original state under the action of inertia, so that the upward movement of the counterweight 28 lags behind the I-shaped block 9, and at this time, the counterweight 28 is in an overweight state, which generates downward pressure on the follower plate 29, so that the follower plate 29 triggers the button switch 31 to trigger the anti-falling mechanism and prevent the goods from falling.

[0033] In the present application, after the crane is moved to the desired position by the universal wheels of the walking mechanism 35, the hydraulic cylinder of the walking mechanism 35 is started to separate the universal wheels from the ground, the suction cup 16 contacts the ground, and then the main hook 10 is hung on the goods to be hoisted, and the two sub-hooks 26 are pulled out and hung on the two sides of the goods.

[0034] After the main hook 10 and the auxiliary hook 26 are hung, the hoisting motor 19 is started, and the hoisting motor 19 drives the rotating cylinder 4 to rotate, so that the high-strength hose 6 is reeled in, and the position of the fixed block 7 rises with the reeling of the high-strength hose 6. At this time, the main hook 10 can lift the goods, and at the same time, the gravity of the goods is applied to the main hook 10, so that the main hook 10 drives the I-shaped block 9 to slide down. When the I-shaped block 9 slides down, the hydraulic oil in the groove 13 is sucked into the cavity 8 through the high-strength hose 6, the fixed pipe 11, the communication cavity 14, the transfer cavity 12 and the rotating cylinder 4. With the hydraulic oil being sucked away, the sliding plate 15 in the groove 13 slides up, and the air in the corresponding suction cup 16 is sucked into the groove 13, so that the suction cup 16 generates negative pressure, and the base 1 is fixed to the ground through the suction cup 16, avoiding the tendency of the crane to fall during the lifting of the goods, so that the crane is safer to use.

[0035] After lifting to the appropriate height, the steering motor 38 is started, and through the rotation of the steering motor 38, the drive gear 39 drives the gear ring 37 to rotate, so that the rotating seat 18 rotates, the orientation of the goods is adjusted, and after the goods are placed, the main hook 10 and the auxiliary hook 26 are removed.

[0036] If the goods are placed normally during the process, the I-shaped block 9 slides up relatively gently at this time, the counterweight 28 slides up with the I-shaped block 9, the counterweight 28 does not drive the follower plate 29 to move, the button switch 31 is not triggered, and the anti-falling mechanism is not triggered. If the goods are unhooked during lifting, the I-shaped block 9 will instantly slide up under the elastic force of the first spring 20 and the pressure of the suction cup 16 due to the sudden disappearance of the weight of the goods. At this time, the sudden upward sliding of the I-shaped block 9, the counterweight 28 remains in the original state under the action of inertia, so that the upward movement of the counterweight 28 lags behind the I-shaped block 9. At this time, the counterweight 28 is in an overweight state, and the downward pressure is generated on the follower plate 29, so that the follower plate 29 triggers the button switch 31, triggers the anti-falling mechanism, and the electric push rod 32 is energized to extend, so that the teeth of the locking block 33 mesh with the teeth of the locking gear 24, so that the locking gear 24 is locked. At this time, the rope wheel 23 cannot continue to rotate, and the steel wire rope 25 cannot be released, so that the goods are hung by the two auxiliary hooks 26, avoiding the falling of the goods after unhooking.

Claims

1. A port ship crane, comprising a base (1), characterized in that, The upper surface of the base (1) is provided with a rotating groove (36), and a rotating seat (18) is rotatably connected in the rotating groove (36) through a bearing. A lifting mechanism is provided above the rotating seat (18). The lifting mechanism includes a portal frame (2), which is fixedly connected to the upper surface of a rotating seat (18). A lifting motor (19) is fixedly connected to the side wall of the frame (2) via a bracket. The output shaft of the lifting motor (19) is rotatably connected to the side wall of the frame (2) via a bearing. A rotating cylinder (4) is fixedly connected to the output shaft of the lifting motor (19). An L-shaped tube (5) is fixedly connected to the side wall of the rotating cylinder (4). The L-shaped tube (5) is located outside the rotating cylinder (4). A high-strength hose (6) is fixedly connected to one end. A fixing block (7) is fixedly connected to the end of the high-strength hose (6) away from the L-shaped tube (5). A cavity (8) is opened in the fixing block (7). The high-strength hose (6) extends through into the cavity (8). An I-shaped block (9) is slidably connected to the cavity (8). Several first springs (20) are fixedly connected between the I-shaped block (9) and the bottom wall of the cavity (8). A main hook (10) is fixedly connected to the lower surface of the I-shaped block (9). The lifting mechanism also includes multiple grooves (13), multiple connecting cavities (14), and a transfer cavity (12) opened in the base (1). The connecting cavity (14) connects the corresponding connecting cavity (14) with the transfer cavity (12). A sliding plate (15) is sealed and slidably connected in the groove (13). Multiple suction cups (16) are fixedly connected to the lower surface of the base (1). The suction cups (16) are connected to the corresponding grooves (13). The frame (2) and the rotating seat (18) are connected by a fixed pipe (11). The fixed pipe (11) is rotatably connected to the side wall of the rotating cylinder (4) through a bearing and extends into its interior. The fixed pipe (11) is rotatably connected to the base (1) through a bearing and extends into the transfer cavity (12). The grooves (13), transfer cavity (12), rotating cylinder (4), and cavity (8) are all filled with hydraulic oil.

2. A port ship crane according to claim 1, characterized in that, Each of the connecting cavities (14) is provided with a pressure relief valve (34). The side wall of the base (1) is provided with multiple sets of walking mechanisms (35). The side wall of the frame (2) is fixedly connected with a horizontal plate (3). The top wall of the frame (2) and the lower surface of the horizontal plate (3) are both fixedly connected with guide wheels (40). The high-strength hose (6) abuts against the guide wheels (40). The side wall of the rotating cylinder (4) is fixedly connected with two annular plates (17).

3. A port ship crane according to claim 1, characterized in that, The rotating seat (18) is located inside the rotating groove (36) with an interference fit of a gear ring (37). The upper surface of the base (1) is fixedly connected to a steering motor (38) by a bracket. The output shaft of the steering motor (38) extends through the rotating groove (36) and is interference fitted with a drive gear (39). The drive gear (39) meshes with the gear ring (37).

4. A port ship crane according to claim 1, characterized in that, The fixed block (7) is provided with a fall protection mechanism, which includes two functional slots (21) opened in the fixed block (7). The inner wall of the functional slot (21) is rotatably connected to a rotating shaft (22) through a bearing. The rotating shaft (22) is interference-fitted with a rope wheel (23) and a locking gear (24). A torsion spring is provided between the rope wheel (23) and the inner wall of the functional slot (21). A steel wire rope (25) is wound on the rope wheel (23). The steel wire rope (25) is fixedly connected to a secondary hook (26). An electric push rod (32) is embedded in the inner wall of the functional slot (21). The output end of the electric push rod (32) is fixedly connected to a locking block (33).

5. A port ship crane according to claim 4, characterized in that, The I-shaped block (9) is a hollow mechanism. The anti-fall mechanism also includes a counterweight (28). The counterweight (28) is slidably connected inside the I-shaped block (9). A follower plate (29) is slidably connected inside the I-shaped block (9). Several second springs (30) are fixedly connected between the follower plate (29) and the inner bottom wall of the I-shaped block (9). A button switch (31) is fixedly connected to the inner bottom wall of the I-shaped block (9). The button switch (31) is electrically connected to the electric push rod (32) through a wire.

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