Crane clamp main shaft structure capable of monitoring numerical value of clamping force

Abstract

The invention discloses a crane clamp main shaft structure capable of monitoring a clamping force numerical value, which comprises a central shaft fixedly arranged on a clamp rack, and a driving rotating sleeve and a driven rotating sleeve which are pivoted on the central shaft, a belt pulley is fixedly arranged on the driving rotating sleeve, and a driving gear is fixedly arranged on the driven rotating sleeve. The number of the driven rotating sleeves is two, the two driven rotating sleeves are located on the left side and the right side of the driving rotating sleeve, the motor drives the driving rotating sleeve through a transmission belt, the driving rotating sleeve drives the driven rotating sleeves at the same time, and driving gears on the driven rotating sleeves drive a pair of racks distributed up and down to conduct reverse transmission. The pair of clamping jaws fixedly connected with the pair of racks get close to each other or get away from each other. The torsion meter on the passive rotating sleeve feeds back the numerical value change to the main control unit, so that an operator can know whether any pair of clamping jaws clamps the container or not and whether any pair of clamping jaws releases the container or not, and a guarantee is provided for carrying safety of the container.

Description

TECHNICAL FIELD

[0001] The present application relates to hoisting equipment, in particular to a container crane. BACKGROUND

[0002] The container crane is provided with a large clamp for clamping a container. The clamp comprises a clamp frame connected with a crane cable, a central shaft fixedly installed on the clamp frame, a driving rotating sleeve and a driven rotating sleeve pivotally connected to the central shaft, a belt pulley fixedly installed on the driving rotating sleeve, and a driving gear fixedly installed on the driven rotating sleeve. The number of the driven rotating sleeves is two, and the two driven rotating sleeves are located on the left and right sides of the driving rotating sleeve. A motor drives the driving rotating sleeve through a transmission belt, and the driving rotating sleeve simultaneously drives the driven rotating sleeves. The driving gear on the driven rotating sleeve drives a pair of upward and downward distributed racks in reverse transmission, and a pair of jaws fixedly connected with the pair of racks move towards each other or away from each other. Two pairs of jaws clamp or release the container synchronously.

[0003] In actual operation, whether any pair of jaws has clamped the container and the value of the clamping force need to be fed back to the master control unit, and the master control unit displays to the operator according to the feedback, so that the operator knows the state of the clamp clamping the container. SUMMARY

[0004] The technical problem solved by the present application is to provide a main shaft structure of a large clamp of a container crane, which provides a structural basis for monitoring the size of the clamping force of any pair of jaws.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a crane clamp main shaft structure capable of monitoring the value of the clamping force, comprising a central shaft fixedly installed on a clamp frame, a driving rotating sleeve and a driven rotating sleeve pivotally connected to the central shaft, a belt pulley fixedly installed on the driving rotating sleeve, and a driving gear fixedly installed on the driven rotating sleeve.

[0006] The number of the driven rotating sleeves is two, and the two driven rotating sleeves are located on the left and right sides of the driving rotating sleeve. A motor drives the driving rotating sleeve through a transmission belt, and the driving rotating sleeve simultaneously drives the driven rotating sleeves. The driving gear on the driven rotating sleeve drives a pair of upward and downward distributed racks in reverse transmission, and a pair of jaws fixedly connected with the pair of racks move towards each other or away from each other.

[0007] One end of the driven rotating sleeve is connected with the driving rotating sleeve, and the other end of the driven rotating sleeve is fixedly installed with the driving gear. A torsion meter is fixedly sleeved on the driven rotating sleeve, and the torsion meter is located between the two ends of the driven rotating sleeve.

[0008] The motor drives the driving rotating sleeve through the transmission belt, the driving rotating sleeve drives two passive rotating sleeves, the driving gear on each passive rotating sleeve drives a pair of rack gears distributed above and below in reverse transmission, and a pair of clamping jaws fixedly connected with the rack gears move towards each other or move away from each other.

[0009] The motor drives the driving rotating sleeve to rotate through the transmission belt, the driving rotating sleeve drives one end of the passive rotating sleeve to rotate, the passive rotating sleeve is twisted, and the detection part of the torsion meter installed on the passive rotating sleeve is relatively rotated with the magnet. The greater the force acting on the passive rotating sleeve, the greater the torsion amplitude, the greater the relative displacement between the detection part and the magnet, and the greater the stress value detected by the torsion meter. The twisted passive rotating sleeve transmits the torsion to the other end, the other end drives the driving gear to rotate, and the driving gear drives the rack gears engaged therewith to linearly displace.

[0010] After any pair of clamping jaws clamps the container, the torsion amplitude of the passive rotating sleeve corresponding to the pair of clamping jaws increases, and the value of the torsion meter on the passive rotating sleeve increases. The value is transmitted to the master control unit, and the master control unit informs the operator through the display screen. The operator can know that a pair of clamping jaws has clamped the container through the sharp increase of the value.

[0011] The driving rotating sleeve is provided with forward and reverse ratchets, a forward ratchet electromagnet matched with the forward ratchet, and a reverse ratchet electromagnet matched with the reverse ratchet. The forward ratchet is arranged on a forward ratchet sleeve, and the reverse ratchet is arranged on a reverse ratchet sleeve. The forward ratchet sleeve and the reverse ratchet sleeve can axially displace along the driving rotating sleeve. A forward ratchet spring is arranged between the forward ratchet sleeve and the forward ratchet electromagnet, and a reverse ratchet spring is arranged between the reverse ratchet sleeve and the reverse ratchet electromagnet.

[0012] The end of the passive rotating sleeve is fixedly provided with forward and reverse driven ratchets. When the forward ratchet electromagnet is electrified to attract the forward ratchet sleeve, the forward ratchet spring is compressed, and the forward ratchet is disengaged from the forward driven ratchet. When the forward ratchet electromagnet is de-energized, the forward ratchet spring is stretched, and the forward ratchet is engaged with the forward driven ratchet.

[0013] When the reverse ratchet electromagnet is electrified to attract the reverse ratchet sleeve, the reverse ratchet spring is compressed, and the reverse ratchet is disengaged from the reverse driven ratchet. When the reverse ratchet electromagnet is de-energized, the reverse ratchet spring is stretched, and the reverse ratchet is engaged with the reverse driven ratchet.

[0014] The forward ratchet is engaged with the forward driven ratchet, the driving gear rotates forward under the drive of the motor, and any pair of clamping jaws moves towards each other to clamp the container. The reverse ratchet is engaged with the reverse driven ratchet, the forward ratchet is disengaged from the forward driven ratchet, the driving gear rotates reversely under the drive of the motor, and any pair of clamping jaws moves away from each other to release the container.

[0015] The forward ratchet sleeve is sleeved on the driving rotation sleeve and is matched with the driving rotation sleeve through the first spline; the reverse ratchet sleeve is movably sleeved on the central shaft, and the periphery of the reverse ratchet sleeve is matched with the inner wall of the driving rotation sleeve through the second spline.

[0016] The forward ratchet electromagnet is fixedly installed on the driving rotation sleeve, and the reverse ratchet electromagnet is fixedly installed on the central shaft.

[0017] The central shaft is hollow, the central shaft is provided with a first wire through hole and a second wire through hole, and a first conductive ring is fixedly installed on the central shaft; the driving rotation sleeve is provided with a third wire through hole.The wire passing through the central shaft is electrically connected with the first conductive ring through the first wire through hole, a first conductive rod is matched in the third wire through hole, the inner end of the first conductive rod is in contact with the first conductive ring, and the outer end of the first conductive rod is electrically connected with the forward ratchet electromagnet. The wire passing through the central shaft is electrically connected with the reverse ratchet electromagnet through the second wire through hole.

[0018] The passive rotation sleeve is provided with a fourth wire through hole, a second conductive rod is inserted in the fourth wire through hole, the central shaft is provided with a fifth wire through hole, a second conductive ring is fixedly sleeved on the central shaft, the wire passing through the central shaft is electrically connected with the second conductive ring through the fifth wire through hole, the second conductive ring is in contact with the inner end of the second conductive rod, and the outer end of the second conductive rod is electrically connected with the torque meter. The torque meter transmits signals to the master control unit through the second conductive rod, the second conductive ring and the wire.

[0019] The passive rotation sleeve is fixedly installed with a gear seat, and the driving gear is installed on the gear seat.

[0020] The value change of the torque meter on the passive rotation sleeve fed back to the master control unit can enable the operator to know whether any pair of clamping jaws has clamped the container and whether any pair of clamping jaws has released the container, thereby providing guarantee for the safety of container handling. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described below in combination with the drawings:

[0022] Figure 1 It is a schematic view of the appearance of the crane clamp main shaft structure;

[0023] Figure 2 It is a sectional view of the crane clamp main shaft structure;

[0024] Figure 3 It is a partial enlarged view of Figure 2

[0025] Figure 4 It is a schematic view of the meshing of the forward ratchet 22 and the forward driven ratchet 31;

[0026] Figure 5Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32;

[0027] Figure 6 Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32; Figure 4 Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32;

[0028] Figure 7 Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32. Figure 5 Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32.

[0029] Fig. 4 is a schematic view of the reverse ratchet 23 meshing with the reverse driven ratchet 32.

[0030] 10, central shaft; 11, first wire through hole; 12, second wire through hole; 13, first conductive ring; 14, second conductive ring; 15, fifth wire through hole;

[0031] 20, driving rotating sleeve; 21, pulley; 22, forward ratchet; 221, forward ratchet electromagnet; 222, forward ratchet sleeve; 223, forward ratchet spring; 224, first spline;

[0032] 23, reverse ratchet; 231, reverse ratchet electromagnet; 232, reverse ratchet sleeve; 233, reverse ratchet spring; 234, second spline; 24, third wire through hole;

[0033] 30, driven rotating sleeve; 31, forward driven ratchet; 32, reverse driven ratchet; 33, fourth wire through hole; 34, gear seat;

[0034] 40, torsion meter. DETAILED DESCRIPTION

[0035] Referring to Figures 1 to 3 A crane clamp spindle structure capable of monitoring the clamping force value, comprising a central shaft 10 fixedly installed on a clamp rack, a driving rotating sleeve 20 and a driven rotating sleeve 30 pivoted to the central shaft, a pulley 21 fixedly installed on the driving rotating sleeve, and a driving gear fixedly installed on the driven rotating sleeve. The number of the driven rotating sleeves 30 is two, and the two driven rotating sleeves are located on the left and right sides of the driving rotating sleeve 20. A motor drives the driving rotating sleeve through a transmission belt, and the driving rotating sleeve simultaneously drives the driven rotating sleeves. The driving gear on the driven rotating sleeve drives a pair of upward and downward distributed rack gears in reverse transmission, and a pair of clamping jaws fixedly connected with the rack gears move towards each other or move away from each other. One end of the driven rotating sleeve 30 is connected with the driving rotating sleeve 20, and the other end of the driven rotating sleeve is fixedly installed with the driving gear. A torsion meter 40 is fixedly sleeved on the driven rotating sleeve, and the torsion meter is located between the two ends of the driven rotating sleeve.

[0036] As Figure 3The active rotating sleeve 20 is provided with a forward ratchet 22 and a reverse ratchet 23, a forward ratchet electromagnet 221 matched with the forward ratchet, and a reverse ratchet electromagnet 231 matched with the reverse ratchet. The forward ratchet is arranged on a forward ratchet sleeve 222, and the reverse ratchet is arranged on a reverse ratchet sleeve 232. The forward ratchet sleeve and the reverse ratchet sleeve are capable of axial displacement along the active rotating sleeve 20. A forward ratchet spring 223 is arranged between the forward ratchet sleeve and the forward ratchet electromagnet, and a reverse ratchet spring 233 is arranged between the reverse ratchet sleeve and the reverse ratchet electromagnet.

[0037] As shown in Figure 6 The end of the passive rotating sleeve 30 is fixedly provided with a forward driven ratchet 31 and a reverse driven ratchet 32. When the forward ratchet electromagnet is powered to attract the forward ratchet sleeve, the forward ratchet spring is compressed, and the forward ratchet is disengaged from the forward driven ratchet. When the forward ratchet electromagnet 221 loses power, the forward ratchet spring 223 is stretched, and the forward ratchet is engaged with the forward driven ratchet.

[0038] As shown in Figure 7 When the reverse ratchet electromagnet 231 is powered to attract the reverse ratchet sleeve 232, the reverse ratchet spring 233 is compressed, and the reverse ratchet 23 is disengaged from the reverse driven ratchet 32. When the reverse ratchet electromagnet loses power, the reverse ratchet spring 233 is stretched, and the reverse ratchet is engaged with the reverse driven ratchet.

[0039] As shown in Figure 3 The forward ratchet sleeve 222 is sleeved on the active rotating sleeve 20, and the forward ratchet sleeve is matched with the active rotating sleeve 20 through a first spline 224. The reverse ratchet sleeve 232 is movably sleeved on the central shaft 10, and the periphery of the reverse ratchet sleeve is matched with the inner wall of the active rotating sleeve 20 through a second spline 234.

[0040] The forward ratchet electromagnet 221 is fixedly installed on the active rotating sleeve 20, and the reverse ratchet electromagnet 231 is fixedly installed on the central shaft 10.

[0041] The central shaft 10 is hollow, and is provided with a first wire through hole 11 and a second wire through hole 12. A first conductive ring 13 is fixedly installed on the central shaft. The active rotating sleeve 20 is provided with a third wire through hole 24. A wire passing through the central shaft 10 is electrically connected with the first conductive ring 13 through the first wire through hole. A first conductive rod is matched with the third wire through hole 24. The inner end of the first conductive rod is in contact with the first conductive ring, and the outer end of the first conductive rod is electrically connected with the forward ratchet electromagnet 221. A wire passing through the central shaft is electrically connected with the reverse ratchet electromagnet 231 through the second wire through hole 12.

[0042] The passive rotating sleeve 30 is provided with a fourth wire through hole 33, and a second electrically-conductive rod is inserted in the fourth wire through hole. The central shaft 10 is provided with a fifth wire through hole 15, and a second electrically-conductive ring 14 is fixedly sleeved on the central shaft. The wire inserted in the central shaft is electrically connected with the second electrically-conductive ring through the fifth wire through hole. The second electrically-conductive ring is in contact with the inner end of the second electrically-conductive rod, and the outer end of the second electrically-conductive rod is electrically connected with the torque meter 40.

[0043] The passive rotating sleeve 30 is provided with a fourth wire through hole 33, and a second electrically-conductive rod is inserted in the fourth wire through hole. The central shaft 10 is provided with a fifth wire through hole 15, and a second electrically-conductive ring 14 is fixedly sleeved on the central shaft. The wire inserted in the central shaft is electrically connected with the second electrically-conductive ring through the fifth wire through hole. The second electrically-conductive ring is in contact with the inner end of the second electrically-conductive rod, and the outer end of the second electrically-conductive rod is electrically connected with the torque meter 40.

[0044] Reference Figures 1 to 3 The motor drives the driving rotating sleeve 20 through a transmission belt. The driving rotating sleeve drives two passive rotating sleeves 30 to rotate. The driving gears on each passive rotating sleeve drive a pair of upper and lower rack gears to move in opposite directions, so that a pair of clamping jaws connected with the rack gears move towards each other or away from each other.

[0045] The motor drives the driving rotating sleeve 20 to rotate through a transmission belt. The driving rotating sleeve drives one end of the passive rotating sleeve 30 to rotate. The passive rotating sleeve is twisted, so that the detection part of the torque meter 40 installed on the passive rotating sleeve rotates relative to the magnet. The greater the force acting on the passive rotating sleeve 30, the greater the twisting amplitude, the greater the relative displacement between the detection part and the magnet, and the greater the stress value detected by the torque meter 40. The twisted passive rotating sleeve transmits the torque to the other end, which drives the driving gear to rotate, and the driving gear drives the rack gear meshing therewith to linearly displace.

[0046] When any pair of clamping jaws clamps a container, the corresponding passive rotating sleeve is twisted to a greater extent, and the value of the torque meter on the passive rotating sleeve increases. The value is transmitted to the main control unit, which informs the operator through a display screen. The operator can know that a pair of clamping jaws has clamped a container according to the sharp increase in the value.

[0047] The above is only a preferred embodiment of the present application. Those skilled in the art can make changes in specific embodiments and application ranges according to the idea of the present application. The content of the specification should not be understood as a limitation of the present application.

Claims

1. A crane clamp spindle structure capable of monitoring the clamping force value, comprising a central shaft (10) fixedly installed on a clamp rack, a driving rotating sleeve (20) and a driven rotating sleeve (30) pivoted on the central shaft, a belt pulley (21) fixedly installed on the driving rotating sleeve, and a driving gear fixedly installed on the driven rotating sleeve. The number of the driven rotating sleeves (30) is two, and the two driven rotating sleeves are located on the left and right sides of the driving rotating sleeve (20). A motor drives the driving rotating sleeve through a transmission belt, and the driving rotating sleeve simultaneously drives the driven rotating sleeves. The driving gear on the driven rotating sleeve drives a pair of upper and lower distributed racks in reverse transmission, and a pair of jaws fixedly connected with the racks move towards each other or away from each other. characterized in that One end of the driven rotating sleeve (30) is connected with the driving rotating sleeve (20), and the other end of the driven rotating sleeve is fixedly installed with the driving gear. A torsion meter (40) is fixedly sleeved on the driven rotating sleeve, and the torsion meter is located between the two ends of the driven rotating sleeve.

2. A crane fixture spindle structure capable of monitoring the clamping force value according to claim 1, characterized in that: The driving rotating sleeve (20) is provided with a forward ratchet (22) and a reverse ratchet (23), a forward ratchet electromagnet (221) matched with the forward ratchet, and a reverse ratchet electromagnet (231) matched with the reverse ratchet. The forward ratchet is arranged on a forward ratchet sleeve (222), and the reverse ratchet is arranged on a reverse ratchet sleeve (232). The forward ratchet sleeve and the reverse ratchet sleeve are capable of axially displacing along the driving rotating sleeve (20). A forward ratchet spring (223) is arranged between the forward ratchet sleeve and the forward ratchet electromagnet, and a reverse ratchet spring (233) is arranged between the reverse ratchet sleeve and the reverse ratchet electromagnet. The end of the driven rotating sleeve (30) is fixedly installed with a forward driven ratchet (31) and a reverse driven ratchet (32). When the forward ratchet electromagnet is electrified to attract the forward ratchet sleeve, the forward ratchet spring is compressed, and the forward ratchet is separated from the forward driven ratchet. When the forward ratchet electromagnet (221) is de-energized, the forward ratchet spring (223) is stretched, and the forward ratchet is engaged with the forward driven ratchet. When the reverse ratchet electromagnet (231) is electrified to attract the reverse ratchet sleeve (232), the reverse ratchet spring (233) is compressed, and the reverse ratchet (23) is separated from the reverse driven ratchet (32). When the reverse ratchet electromagnet is de-energized, the reverse ratchet spring (233) is stretched, and the reverse ratchet is engaged with the reverse driven ratchet.

3. A crane clamp spindle structure capable of monitoring the clamping force value according to claim 2, characterized in that: The forward ratchet sleeve (222) is sleeved on the driving rotating sleeve (20), and the forward ratchet sleeve is matched with the driving rotating sleeve (20) through a first spline (224). The reverse ratchet sleeve (232) is movably sleeved on the central shaft (10), and the periphery of the reverse ratchet sleeve is matched with the inner wall of the driving rotating sleeve (20) through a second spline (234).

4. A crane clamp spindle structure capable of monitoring the clamping force value according to claim 3, characterized in that: The forward ratchet electromagnet (221) is fixedly installed on the driving rotating sleeve (20), and the reverse ratchet electromagnet (231) is fixedly installed on the central shaft (10).

5. A crane clamp spindle structure capable of monitoring the clamping force value according to claim 4, characterized in that: The central shaft (10) is hollow, and is provided with a first wire through hole (11) and a second wire through hole (12). A first conductive ring (13) is fixedly installed on the central shaft. The driving rotating sleeve (20) is provided with a third wire through hole (24). The wire passing through the center shaft (10) is electrically connected with the first conductive ring (13) through the first wire through hole, and the first conductive rod is matched in the third wire through hole (24). The inner end of the first conductive rod is in contact with the first conductive ring, and the outer end of the first conductive rod is electrically connected with the positive ratchet electromagnet (221); The wire passing through the center shaft is electrically connected with the reverse ratchet electromagnet (231) through the second wire through hole (12).

6. A crane clamp spindle structure capable of monitoring the clamping force value according to claim 1, characterized in that: The passive rotating sleeve (30) is provided with the fourth wire through hole (33), the second conductive rod is inserted in the fourth wire through hole, the center shaft (10) is provided with the fifth wire through hole (15), the second conductive ring (14) is fixedly sleeved on the center shaft, the wire passing through the center shaft is electrically connected with the second conductive ring through the fifth wire through hole, the second conductive ring is in contact with the inner end of the second conductive rod, and the outer end of the second conductive rod is electrically connected with the torque meter (40).

7. A clamp spindle structure of a crane capable of monitoring the value of clamping force according to claim 1, characterized in that: The passive rotating sleeve (30) is fixedly installed with the gear seat (34), and the driving gear is installed on the gear seat.

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