Special lifting appliance for port crane

Abstract

A special lifting appliance for a port crane relates to the technical field of cranes. The lifting appliance aims at solving the problem that when a traditional lifting appliance is matched with a crane to lift large annular goods, time and labor are wasted, and therefore working efficiency is low. The telescopic end of the hydraulic cylinder is used for driving the driving disc to move downwards, so that the bottom of the supporting arm hinged to the supporting disc is shrunk towards the middle; at the moment, the lifting appliance is transported to the middle of an inner hole of the large annular cargo through a crane, then the hydraulic cylinder is reset, the driving disc is driven by the hydraulic cylinder to move upwards, and the bottom ends of all the hinged supporting arms on the supporting disc continuously expand outwards through sliding of the outer surfaces of balls on the driving disc and the side faces of the supporting arms, so that the large annular cargo is lifted. And when the stop blocks on the side surfaces of the bottom ends of the support arms are in close contact with the inner bottom edge of the large annular cargo, outward pressure is applied to all the support arms in cooperation with the driving disc, so that the lifting appliance and the large annular cargo can be fixed. The annular cargo hoisting device is suitable for hoisting annular cargoes.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a special hoisting device for port cranes. Background Art

[0002] At present, when containers are loaded and unloaded at the dock, the dock berth needs to be equipped with corresponding container loading and unloading cranes. Existing container cranes are usually composed of a trolley travel mechanism, outriggers, main beams, and a trolley frame assembly. Two trolley tracks are arranged on the main beam, and the trolley frame runs along the trolley direction on the main beam track. The trolley frame includes a lifting mechanism, a trolley running mechanism, a sling system, a trolley frame steel structure, and a driver's cab. The operation of the main lifting mechanism completes the lifting and lowering of the goods through the lifting wire rope and the sling system, and realizes the horizontal movement of the trolley direction through the tire-type trolley running mechanism and the trolley running mechanism; but when hoisting annular goods (such as large tires), it is necessary to manually pass the steel cable through the large annular goods, and then fix the steel cable on the hook of the crane before the large annular goods can be hoisted; when manually passing the steel cable through the large annular goods, it is necessary to use a forklift to lift one end of the large annular goods so that the steel cable can pass through the large annular goods smoothly.

[0003] In summary, using traditional slings in conjunction with cranes to lift large ring-shaped cargoes is time-consuming and labor-intensive, resulting in low work efficiency. Utility Model Content

[0004] The utility model provides a special hoist for port cranes to solve the problem that it is time-consuming and labor-intensive to hoist large annular goods by using traditional hoists in combination with cranes, thus resulting in low working efficiency.

[0005] The utility model is a special lifting device for a port crane, which comprises a lifting lug 1, an I-shaped shaft 2, a slewing sleeve 3, a sleeve 5, a hydraulic cylinder 6, a supporting plate 7, a supporting arm 8, a ball bearing 10 and a driving plate 11;

[0006] A lifting ear 1 is provided at the center of the upper surface of the I-shaped shaft 2, a rotating sleeve 3 is sleeved in the middle of the outer surface of the I-shaped shaft 2, the bottom end of the rotating sleeve 3 is fixedly connected to the top of the sleeve 5, the bottom end of the sleeve 5 is fixedly connected to the center of the upper surface of the support plate 7, a hydraulic cylinder 6 is provided at the center of the lower surface of the support plate 7, and the base of the hydraulic cylinder 6 is detachably connected to the lower surface of the support plate 7, the output end of the hydraulic cylinder 6 is fixedly connected to the center of the upper surface of the driving plate 11, the outer surface of the driving plate 11 is uniformly provided with n hemispherical grooves along the circumferential direction, n is a positive integer, and a ball 10 is embedded in each hemispherical groove, the outer surface of the support plate 7 is uniformly provided with m support arms 8 along the circumferential direction, m is a positive integer, and the top of the support arm 8 is hinged to the outer surface of the support plate 7;

[0007] Furthermore, a bearing 4 is provided between the inner surface of the rotary sleeve 3 and the middle of the outer surface of the I-shaped shaft 2;

[0008] Furthermore, the diameter of the support disk 7 is smaller than the diameter of the driving disk 11;

[0009] Furthermore, the number m of the supporting arms 8 is 4≤m≤6;

[0010] Furthermore, the number n of the hemispherical grooves on the outer circumferential surface of the driving disk 11 is 50≤n≤400;

[0011] Furthermore, a stopper 9 is provided on the side of the bottom end of the support arm 8;

[0012] Furthermore, the cross section of the stopper 9 is semicircular or rectangular, and the outer surface of the stopper 9 is provided with a non-slip rubber layer;

[0013] Furthermore, the rotary sleeve 3, the sleeve 5 and the support plate 7 are integrally arranged;

[0014] Furthermore, the lower surface of the support plate 7 is evenly provided with two guide posts along the circumferential direction, and the upper surface of the driving plate 11 is evenly provided with two through holes along the circumferential direction, and a linear bearing is embedded in each through hole. After the bottom end of the guide post on the support plate 7 passes through the inner ring of the linear bearing inside the through hole on the driving plate 11, it is detachably connected to the center of the top of the limit block;

[0015] Furthermore, the outer surface of the ball 10 on the driving disk 11 is slidably connected to the side of the support arm 8;

[0016] Furthermore, when it is necessary to lift large annular cargo, the sling of the structure is installed on the hook of the starter, which is essentially to connect the hook of the crane with the lifting ear 1 on the sling, and drive the drive plate 11 to move downward at a uniform speed by the telescopic end of the hydraulic cylinder 6, so that the bottom of the support arm 8 hinged on the support plate 7 can be retracted toward the middle; at this time, the sling is transported to the middle of the inner hole of the large annular cargo by the crane, and the hydraulic cylinder 6 is reset, so that the hydraulic cylinder 6 is used to drive the drive plate 11 to move upward at a uniform speed, and And by sliding the outer surface of the ball 10 on the driving plate 11 with the side of the support arm 8, the bottom ends of all the hinged support arms 8 on the support plate 7 are continuously expanded outward until the block 9 on the side of the bottom end of the support arm 8 is in close contact with the inner bottom edge of the large annular cargo, and then the driving plate 11 is used to apply an outward pressure to all the support arms 8, so that the sling and the large annular cargo can be fixed, thereby realizing the lifting operation of the large annular cargo; the use of a sling with this structure does not require manual threading of the rope, thereby improving the work efficiency of lifting large annular cargo.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model overcomes the shortcomings of the prior art and utilizes the telescopic end of the hydraulic cylinder to drive the driving disk to move downward at a uniform speed, so that the bottom of the support arm hinged on the support disk can be retracted toward the middle; at this time, the crane is used to transport the sling to the middle of the inner hole of the large annular cargo, and the hydraulic cylinder is reset, so that the hydraulic cylinder is used to drive the driving disk to move upward at a uniform speed, and the outer surface of the ball on the driving disk slides with the side of the support arm, so that the bottom ends of all the hinged support arms on the support disk are continuously expanded outwards until the stopper on the side of the bottom end of the support arm is in close contact with the inner bottom edge of the large annular cargo, and then the driving disk cooperates to apply an outward pressure to all the support arms, so that the sling can be fixed to the large annular cargo, thereby realizing the lifting operation of the large annular cargo; the sling using this structure does not require manual threading of the rope, thereby improving the work efficiency of lifting large annular cargo. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a main sectional view of a special spreader for a port crane described in the utility model;

[0020] Figure 2 It is a main sectional view of a driving disc in a special spreader for a port crane described in the utility model. DETAILED DESCRIPTION

[0021] Specific implementation method 1: Combination Figure 1 and Figure 2 The present embodiment is described as a special lifting device for a port crane, which comprises a lifting lug 1, an I-shaped shaft 2, a slewing sleeve 3, a sleeve 5, a hydraulic cylinder 6, a support plate 7, a support arm 8, a ball bearing 10 and a driving plate 11;

[0022] A lifting ear 1 is provided at the center of the upper surface of the I-shaped shaft 2, a rotating sleeve 3 is sleeved in the middle of the outer surface of the I-shaped shaft 2, the bottom end of the rotating sleeve 3 is fixedly connected to the top of the sleeve 5, the bottom end of the sleeve 5 is fixedly connected to the center of the upper surface of the support plate 7, a hydraulic cylinder 6 is provided at the center of the lower surface of the support plate 7, and the base of the hydraulic cylinder 6 is detachably connected to the lower surface of the support plate 7, the output end of the hydraulic cylinder 6 is fixedly connected to the center of the upper surface of the driving plate 11, the outer surface of the driving plate 11 is uniformly provided with n hemispherical grooves along the circumferential direction, n is a positive integer, and a ball 10 is embedded in each hemispherical groove, the outer surface of the support plate 7 is uniformly provided with m support arms 8 along the circumferential direction, m is a positive integer, and the top of the support arm 8 is hinged to the outer surface of the support plate 7;

[0023] In this specific embodiment, when it is necessary to hoist large annular goods, the hoisting device of this structure is installed on the hook of the starter, which is essentially to connect the hook of the crane with the lifting ear 1 on the hoisting device, and drive the driving plate 11 to move downward at a uniform speed by the telescopic end of the hydraulic cylinder 6, so that the bottom of the support arm 8 hingedly connected to the support plate 7 can be retracted toward the middle; at this time, the hoisting device is transported to the middle of the inner hole of the large annular goods by the crane, and the hydraulic cylinder 6 is reset, so that the driving plate 11 is driven by the hydraulic cylinder 6 to move upward at a uniform speed. And by sliding the outer surface of the ball 10 on the driving plate 11 with the side of the support arm 8, the bottom ends of all the hinged support arms 8 on the support plate 7 are continuously expanded outwards until the block 9 on the side of the bottom end of the support arm 8 is in close contact with the inner bottom edge of the large annular cargo, and then the driving plate 11 is used to apply an outward pressure to all the support arms 8, so that the sling and the large annular cargo can be fixed, thereby realizing the lifting operation of the large annular cargo; the use of a sling with this structure does not require manual threading of the rope, thereby improving the work efficiency of lifting large annular cargo.

[0024] Specific implementation method 2: Combination Figure 1 and Figure 2 This embodiment is described as a further limitation of the spreader described in the first embodiment. This embodiment is a special spreader for a port crane, and a bearing 4 is provided between the inner surface of the slewing sleeve 3 and the middle part of the outer surface of the I-shaft 2.

[0025] Specific implementation method three: Combination Figure 1 and Figure 2 This embodiment is described as a further limitation of the spreader described in the first specific embodiment. In the spreader dedicated to a port crane described in this embodiment, the diameter of the support plate 7 is smaller than the diameter of the drive plate 11 .

[0026] Specific implementation method four: Combination Figure 1 and Figure 2 The present embodiment is described as further limiting the spreader described in the first specific embodiment. The present embodiment is a special spreader for a port crane, and the number of the supporting arms 8 is m, 4≤m≤6.

[0027] Specific implementation method five: Combination Figure 1 and Figure 2 The present embodiment is described as a further limitation of the spreader described in the first specific embodiment. The present embodiment is a special spreader for a port crane, and the number n of the hemispherical grooves on the outer circumferential surface of the driving disc 11 is 50≤n≤400.

[0028] Specific implementation method six: Combination Figure 1 and Figure 2The present embodiment is described as a further limitation of the spreader described in the fourth embodiment. The present embodiment is a special spreader for a port crane, and a stopper 9 is provided on the side surface of the bottom end of the support arm 8.

[0029] Specific implementation method seven: Combination Figure 1 and Figure 2 This embodiment is described as a further limitation of the spreader described in the sixth embodiment. This embodiment is a special spreader for port cranes, wherein the cross-section of the stopper 9 is semicircular or rectangular, and an anti-slip rubber layer is provided on the outer surface of the stopper 9.

[0030] Specific implementation method eight: Combination Figure 1 and Figure 2 The present embodiment is described as a further limitation of the spreader described in the first specific embodiment. The present embodiment is a special spreader for a port crane, wherein the slewing sleeve 3, the sleeve 5 and the support plate 7 are integrally arranged.

[0031] Specific implementation method nine: Combination Figure 1 and Figure 2 The present embodiment is described. The present embodiment is a further limitation of the spreader described in the first embodiment. The present embodiment is a special spreader for a port crane. The lower surface of the support plate 7 is evenly provided with two guide columns along the circumferential direction, and the upper surface of the drive plate 11 is evenly provided with two through holes along the circumferential direction. A linear bearing is embedded in each through hole. After the bottom end of the guide column on the support plate 7 passes through the inner ring of the linear bearing inside the through hole on the drive plate 11, it is detachably connected to the center of the top end of the limit block.

[0032] This specific embodiment is configured in this way so as to provide a guiding effect on the driving disk 11, and the limit block at the bottom of the guide column is used to limit the movement stroke of the driving disk 11.

[0033] Specific implementation method ten: Combination Figure 1 and Figure 2 This embodiment is described. This embodiment is a further limitation of the spreader described in the specific embodiment 1. In this embodiment, a special spreader for a port crane is described. The outer surface of the ball 10 on the driving plate 11 is slidably connected to the side of the support arm 8.

[0034] In this specific embodiment, the ball 10 is connected to the inner rolling surface of the hemispherical groove on the outer circumferential surface of the driving disk 11. When the outer surface of the ball 10 on the driving disk 11 is in sliding contact with the side of the support arm 8, the friction force is greatly reduced, the lubricity between the two is improved, and the service life of the device is extended.

[0035] How it works

[0036] When in use, when it is necessary to hoist large annular cargo, the sling of this structure is installed on the hook of the starter, which is essentially to connect the hook of the crane with the lifting ear 1 on the sling, and drive the driving plate 11 to move downward at a uniform speed by the telescopic end of the hydraulic cylinder 6, so that the bottom of the support arm 8 hinged on the support plate 7 can be retracted toward the middle; at this time, the sling is transported to the middle of the inner hole of the large annular cargo by the crane, and the hydraulic cylinder 6 is reset, so that the hydraulic cylinder 6 is used to drive the driving plate 11 to move upward at a uniform speed, and the outer surface of the ball 10 on the driving plate 11 slides with the side of the support arm 8, so that the bottom ends of all the hinged support arms 8 on the support plate 7 are continuously expanded outward, until the stopper 9 on the side of the bottom end of the support arm 8 is in close contact with the inner bottom edge of the large annular cargo, and then the driving plate 11 is used to apply an outward pressure to all the support arms 8, so that the sling can be fixed to the large annular cargo, and the lifting operation of the large annular cargo is realized; the use of a sling with this structure does not require manual threading, thereby improving the work efficiency of hoisting large annular cargo.

Claims

1. A special spreader for a port crane, characterized in that: It comprises a lifting lug (1), an I-shaped shaft (2), a rotating sleeve (3), a sleeve (5), a hydraulic cylinder (6), a supporting plate (7), a supporting arm (8), a ball bearing (10) and a driving plate (11); A lifting lug (1) is provided at the center of the upper surface of the I-shaped shaft (2); a rotating sleeve (3) is sleeved in the middle of the outer surface of the I-shaped shaft (2); the bottom end of the rotating sleeve (3) is fixedly connected to the top end of the sleeve (5); the bottom end of the sleeve (5) is fixedly connected to the center of the upper surface of the support plate (7); a hydraulic cylinder (6) is provided at the center of the lower surface of the support plate (7); the base of the hydraulic cylinder (6) is detachably connected to the lower surface of the support plate (7); the output end of the hydraulic cylinder (6) is fixedly connected to the center of the upper surface of the driving plate (11); the outer surface of the driving plate (11) is uniformly provided with n hemispherical grooves along the circumferential direction, n is a positive integer; a ball (10) is embedded in each hemispherical groove; the outer surface of the support plate (7) is uniformly provided with m support arms (8) along the circumferential direction, m is a positive integer; the top of the support arm (8) is hingedly connected to the outer surface of the support plate (7).

2. A special lifting device for port crane according to claim 1, characterized in that: A bearing (4) is provided between the inner surface of the rotating sleeve (3) and the middle of the outer surface of the I-shaped shaft (2).

3. A special lifting device for port crane according to claim 1, characterized in that: The diameter of the support disk (7) is smaller than the diameter of the driving disk (11).

4. A special lifting device for port crane according to claim 1, characterized in that: The number m of the supporting arms (8) is 4≤m≤6.

5. The special lifting device for port crane according to claim 1, characterized in that: The number n of the hemispherical grooves on the outer circumferential surface of the driving disk (11) is 50≤n≤400.

6. A special lifting device for port crane according to claim 4, characterized in that: A stopper (9) is provided on the side surface of the bottom end of the support arm (8).

7. A special lifting device for port crane according to claim 6, characterized in that: The cross section of the stopper (9) is semicircular or rectangular, and the outer surface of the stopper (9) is provided with an anti-slip rubber layer.

8. The special lifting device for port crane according to claim 1, characterized in that: The rotating sleeve (3), the sleeve (5) and the supporting plate (7) are integrally arranged.

9. The special lifting device for port crane according to claim 1, characterized in that: The lower surface of the support plate (7) is evenly provided with two guide columns along the circumferential direction, and the upper surface of the driving plate (11) is evenly provided with two through holes along the circumferential direction, and a linear bearing is embedded in each through hole. After the bottom end of the guide column on the support plate (7) passes through the inner ring of the linear bearing inside the through hole on the driving plate (11), it is detachably connected to the center of the top end of the limit block.

10. The special lifting device for port crane according to claim 1, characterized in that: The outer surface of the ball (10) on the driving disk (11) is slidably connected to the side surface of the support arm (8).

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