Hoisting mechanism of crane

Abstract

The crane hoisting mechanism comprises a speed reducer, a coupler, a hoisting motor and a winding drum, first supporting plates are arranged on the two sides of the winding drum, a center rotating shaft penetrating through the first supporting plates is arranged in the winding drum, and an anti-falling mechanism is arranged at the right end of the center rotating shaft; the right side of the anti-falling mechanism is rotationally connected with a locking mechanism; the right side of the locking mechanism is in engaged connection with a compound gear which is in engaged connection with a driving assembly. A synchronous transmission component is arranged on the right side of the central rotating shaft; a reciprocating lead screw and a limiting sliding assembly are arranged below the first supporting plate, and an anti-falling auxiliary mechanism is arranged on the reciprocating lead screw. Through the combined action of the anti-falling mechanism, the locking mechanism and the auxiliary anti-falling mechanism, the heavy object falling accident caused by rapid rotation of the winding drum due to unexpected situations can be effectively prevented, and the safety and reliability of operation of the hoisting mechanism of the crane are remarkably improved. And the overall mechanical structure is simple in design, and large-scale production and application in the crane hoisting mechanism industry are easy.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to a crane hoisting mechanism. Background Art

[0002] In the field of crane technology, the lifting mechanism is one of the most core functional components of the crane, and its performance is directly related to the safety and efficiency of the lifting operation. The traditional crane lifting mechanism usually includes key components such as reducer, coupling, lifting motor and drum. These components are connected through precise mechanical connections to achieve the lifting and lowering operation of heavy objects.

[0003] It has been found in the use of existing crane hoisting mechanisms that in unexpected situations such as failure of the braking system, interruption of power supply or sudden failure of the reducer, the drum may lose control and rotate rapidly, causing the wire rope to slide down rapidly, thereby causing the risk of heavy objects falling suddenly. This uncontrolled rapid fall phenomenon not only seriously threatens the safety of the work site, but may also cause serious consequences such as damage to equipment, damage to heavy objects and even casualties. In the prior art, when such an unexpected situation occurs, the drum cannot be braked and controlled in time; in addition, the wire rope is easily disordered during the winding process on the drum, and the arrangement of the wire rope on the drum is poor, resulting in low reliability in use. Summary of the invention

[0004] Purpose of the invention: The present invention proposes a crane hoisting mechanism, the purpose of which is to solve the problems existing in the prior art.

[0005] Technical solution: The present invention proposes a crane hoisting mechanism, including a reducer 1, a coupling 2, a hoisting motor 3, and a drum 5. The hoisting motor 3 is connected to the reducer 1 through the coupling 2, and the reducer 1 is connected to the drum 5 through the coupling 2; first support plates 6 are provided on both sides of the drum 5, a steel wire rope 15 is wound around the drum 5, a central rotating shaft 4 penetrating the first support plate 6 is provided inside the drum 5, and an anti-falling mechanism 7 is provided at the right end of the central rotating shaft 4; the anti-falling mechanism 7 includes a fixed block 701 and an anti-falling plug block 702; the fixed block 701 is fixedly installed at the right end of the central rotating shaft 4, and a sliding cavity 706 is provided inside the fixed block 701, and an anti-falling plug block 702 is slidably embedded in the sliding cavity 706; the anti-falling plug block 702 is provided on both sides of the insertion end There is a rectangular groove 707, in which a limit block 703 and a compression spring 704 are arranged, and the limit block 703 is elastically connected to the anti-fall plug block 702 through the compression spring 704; the anti-fall mechanism 7 is rotatably connected to the locking mechanism 8 on the right side; the locking mechanism 8 is meshedly connected to the composite gear 9 on the right side, and one side of the composite gear 9 is rotatably connected to the second support plate 10; the composite gear 9 includes an outer gear 901 and an inner gear ring 902, wherein the inner gear ring 902 is fixed on one side of the outer gear 901; the outer gear 901 is meshedly connected to the drive assembly 11; a synchronous transmission assembly 12 is arranged on the right side of the central shaft 4; a reciprocating screw 14 and a limit sliding assembly 16 are arranged below the first support plate 6, and an anti-fall auxiliary mechanism 13 is arranged on the reciprocating screw 14.

[0006] Furthermore, the locking mechanism 8 includes a support seat 801, a locking ring 802 and a reset assembly; the locking ring 802 is fixedly installed on the support seat 801 and is embedded in the outside of the anti-fall mechanism 7; a plurality of locking protrusions 803 are arranged inside the locking ring 802, and reset grooves 810 are arranged at intervals between the locking protrusions 803; a rotating cavity 806 is penetrated through the middle of the support seat 801, and the rotating cavity 806 is aligned with the middle of the locking ring 802. The sizes of the rotating cavity 806 and the locking ring 802 are larger than the size of the anti-fall mechanism 7, and the locking protrusions 803 do not contact the anti-fall mechanism 7; the reset assembly is arranged on the outer ring of the rotating cavity 806, and the support seat 801 is meshed and connected with the composite gear 9.

[0007] Furthermore, the reset assembly includes a reset rail 804, a reset plug 805, a first transmission gear 807, a transmission shaft 808 and a second transmission gear 809; the first transmission gear 807 is meshed and connected with the inner gear ring 902 of the composite gear 9; the reset rail 804 is fixedly installed on the support seat 801, and the reset plug 805 is slidably connected to the support seat 801 through the reset rail 804; a rack 811 is provided on one side of the reset plug 805, and the rack 811 is meshed and connected with the second transmission gear 809; the reset plug 805 is slidably connected with the locking ring 802 through the reset groove 810; the second transmission gear 809 is fixedly connected to the first transmission gear 807 through the transmission shaft 808.

[0008] Furthermore, there are multiple reset components, and the number of reset components is equal to the number of reset grooves 810.

[0009] Furthermore, the anti-fall auxiliary mechanism 13 includes an outer box body 1301 ; rope holes 1302 are provided on the upper and lower sides of the outer box body 1301 ; a reciprocating nut 1303 is fixedly installed on the rear side of the outer box body 1301 , and the reciprocating nut 1303 is sleeved on the reciprocating screw rod 14 .

[0010] Furthermore, the anti-fall auxiliary mechanism 13 also includes a fixed pulley 1304 and a transmission bar 1311; two pulley shafts 1305 are fixed side by side inside the outer box 1301, the pulley shaft 1305 is rotatably connected to the fixed pulley 1304, and a wire rope 15 is wound around the fixed pulley 1304; a first claw 1309 and a second claw 1310 are rotatably installed on one side of the fixed pulley 1304, and the rotating ends of the first claw 1309 and the second claw 1310 are symmetrical about the pulley shaft 1305; the rotating end of the first claw 1309 and the claw end of the second claw 1310 are connected by the transmission bar 13 11 are rotatably connected at both ends; a magnet block 1313 is fixedly installed on one side of the fixed pulley 1304, and a response spring 1312 is fixedly installed on the non-magnetic end of the magnet block 1313; the claw end of the first claw 1309 is magnetically attracted to one end of the magnetic surface of the magnet block 1313, and the other end of the response spring 1312 is fixedly installed on the rotating end of the second claw 1310; a fixed base 1306 is fixedly installed inside the outer box body 1301, and a limit clamping ring 1307 is provided on the fixed base 1306, and a plurality of clamping blocks 1308 are provided on the inner ring of the limit clamping ring 1307, and the pulley shaft 1305 passes through the middle of the limit clamping ring 1307.

[0011] Furthermore, the driving assembly 11 includes a driving gear 1101 and a driving motor 1102 ; the output shaft of the driving motor 1102 is fixedly connected to the driving gear 1101 , and the driving gear 1101 is meshedly connected to the outer gear 901 of the composite gear 9 .

[0012] Furthermore, a movable ball 705 is provided on the front side of the insertion end of the anti-fall plug 702; the sliding cavity 706 and the anti-fall plug 702 are T-shaped; the reciprocating screw 14 is installed for transverse rotation under the first support plate 6, and the right end of the reciprocating screw 14 passes through the first support plate 6; a reciprocating thread is provided on the reciprocating screw 14.

[0013] Furthermore, the limit sliding assembly 16 includes a limit sliding rod 1601 and a limit sliding block 1602, and the limit sliding block 1602 is slidably mounted on the limit sliding rod 1601; the limit sliding rod 1601 is laterally fixedly installed between the first support plates 6 and is located below the reciprocating screw 14; the limit sliding block 1602 is fixedly connected to the lower side of the anti-fall auxiliary mechanism 13.

[0014] Furthermore, the synchronous transmission assembly 12 includes a first transmission wheel 1201, a transmission belt 1202 and a second transmission wheel 1203; the first transmission wheel 1201 is fixedly installed on the right side of the central rotating shaft 4 and is located on the left side of the anti-fall mechanism 7; the second transmission wheel 1203 is fixedly installed on the right end of the reciprocating screw rod 14; the transmission belts are respectively mounted on the first transmission wheel 1201 and the second transmission wheel 1203.

[0015] Beneficial effects:

[0016] 1. Compared with the prior art, the crane hoisting mechanism, through the cooperation of the anti-fall mechanism, the locking mechanism and the auxiliary anti-fall mechanism, significantly improves the safety and reliability of the crane hoisting mechanism. In specific situations such as when the brake fails or the brake fails to brake in a power outage, the anti-fall mechanism will promptly brake the drum to prevent the drum from rotating rapidly and causing the heavy object to fall rapidly. Even in the most unfavorable situation, when the anti-fall plug has not yet prevented the drum from rotating rapidly, the auxiliary anti-fall mechanism can provide additional safety protection, effectively slowing down the speed of the wire rope falling and reducing the risk of accidents.

[0017] 2. Compared with the prior art, the crane hoisting mechanism has an anti-fall plug embedded in the sliding cavity of the anti-fall mechanism, which responds quickly under the action of increased centrifugal force, and the anti-fall plug is inserted into the locking protrusion interval of the locking mechanism, thereby realizing the rapid locking of the drum rotation, and effectively preventing falling accidents caused by rapid rotation of the drum due to unexpected situations such as failure of the braking system, power supply interruption or sudden failure of the reducer. It can respond quickly in an emergency and realize the locking of the drum, and the overall mechanical structure design is simple, the production technology difficulty is low, and it is easy to be mass-produced and applied in the crane hoisting mechanism industry.

[0018] 3. Compared with the prior art, the hoisting mechanism of the crane, when an unexpected situation causes the drum to rotate rapidly, when the drum rotates too fast, the anti-fall mechanism is triggered, the anti-fall plug block is affected by the increased centrifugal force, the balance state is broken, the limit block is pressed into the rectangular groove, the anti-fall plug block slides out of the sliding cavity, and the moving ball at the front end uses the rolling characteristics to significantly reduce the friction between the contact surface, thereby ensuring that the plug block can be quickly and smoothly inserted into the locking protrusion interval, realizing instant drum rotation locking.

[0019] 4. Compared with the prior art, the hoisting mechanism of the crane is also designed with a reset component in the locking mechanism, and is equipped with a composite gear and a drive component. When it returns to normal, the reset component can push the anti-fall plug back into the sliding cavity of the fixed block under the cooperation of the composite gear and the drive component. At this time, the limit block pops out again and restores the anti-fall plug to its initial position. Then, under the reverse drive of the drive motor, the reset component returns to its initial state, ready to respond again when needed next time, greatly improving work efficiency and safety, and reducing downtime and maintenance costs.

[0020] 5. Compared with the prior art, the hoisting mechanism of the crane integrates a reciprocating screw, a limit sliding assembly, an anti-falling auxiliary mechanism and a synchronous transmission assembly. The wire rope enters from the rope threading hole above the outer box of the anti-falling auxiliary mechanism and passes out from the rope threading hole below. Through the synergistic effect of the above structures, the anti-falling auxiliary mechanism plays a key guiding and stabilizing role in the process of retracting and releasing the wire rope, ensuring that the wire rope is wound on the drum in an orderly manner to prevent confusion, improve the arrangement effect and reliability, and further avoid performance degradation or safety hazards caused by winding confusion. At the same time, it improves the degree of automation and ease of operation of the equipment and reduces the need and cost of manual intervention.

[0021] 6. Compared with the prior art, the hoisting mechanism of the crane is also specially provided with a fixed pulley, a first clamping claw, a second clamping claw and a limit clamping ring in parallel in the auxiliary anti-falling mechanism. When the drum rotates abnormally rapidly, causing the heavy object to fall rapidly, the anti-falling auxiliary mechanism is triggered, and the first clamping claw breaks the balance due to the increase of centrifugal force, so that the first clamping claw and the second clamping claw are clamped into the clamping block of the limit clamping ring, forming a double lock, effectively limiting the rapid rotation of the fixed pulley, thereby changing the rolling friction into sliding friction, achieving a fast response and effective deceleration of the fast falling speed of the wire rope under specific conditions, thereby assisting in preventing the heavy object from falling rapidly due to the rapid release of the wire rope, and improving the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the crane hoisting mechanism from the first perspective;

[0023] Figure 2 It is a structural schematic diagram of the crane hoisting mechanism from a second perspective;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the anti-fall mechanism;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the anti-fall plug;

[0026] Figure 5 It is a schematic diagram of the structure of the locking mechanism from a first-person perspective;

[0027] Figure 6It is a structural schematic diagram of the locking mechanism from a second perspective;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the locking ring;

[0029] Figure 8 A schematic diagram of the partial structure of the reset component;

[0030] Fig. 9 It is a schematic diagram of the structure of the compound gear;

[0031] Fig.10 is a schematic diagram of the structure of the drive component;

[0032] Fig.11 It is a structural schematic diagram of a synchronous transmission component;

[0033] Fig.12 It is a schematic diagram of the cross-sectional structure of the anti-fall auxiliary mechanism;

[0034] Fig.13 It is a schematic diagram of the partial structure of the anti-fall auxiliary mechanism;

[0035] Fig.14 It is a structural schematic diagram of the limited sliding component.

[0036] Reference numerals:

[0037] 1. Reducer; 2. Coupling; 3. Hoisting motor; 4. Central shaft; 5. Reel; 6. First support plate; 7. Anti-fall mechanism; 8. Locking mechanism; 9. Composite gear; 10. Second support plate; 11. Driving assembly; 12. Synchronous transmission assembly; 13. Anti-fall auxiliary mechanism; 14. Reciprocating screw rod; 15. Wire rope; 16. Limiting sliding assembly; 701. Fixed block; 702. Anti-fall plug; 703. Limiting block; 704. Compression spring; 705. Moving ball; 706. Sliding cavity; 707. Rectangular groove; 801. Support seat; 802. Locking ring; 803. Locking protrusion; 804. Reset slide rail; 805. Reset plug; 806. Rotating cavity; 807. First transmission gear; 808. Transmission shaft; 809. Second transmission gear; 810. Reset groove; 811. Rack; 901. External gear; 902. Internal gear ring; 1101. Driving gear; 1102. Driving motor; 1201. First transmission wheel; 1202. Transmission belt; 1203. Second transmission wheel; 1301. Outer box; 1302. Rope threading hole; 1303. Reciprocating nut; 1304. Fixed pulley; 1305. Pulley shaft; 1306. Fixed base; 1307. Limiting clamp ring; 1308. Clamp block; 1309. First clamping claw; 1310. Second clamping claw; 1311. Transmission strip; 1312. Response spring; 1313. Magnet block; 1601. Limiting slide bar; 1602. Limiting slide block. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Reference Figure 1-Figure 14 The hoisting mechanism of the crane provided by the present invention includes a reducer 1, a coupling 2, a lifting motor 3, and a drum 5. The lifting motor 3 is connected to the reducer 1 through the coupling 2, and the reducer 1 is connected to the drum 5 through the coupling 2. A first support plate 6 is provided on both sides of the drum 5 for supporting the drum 5. A steel wire rope 15 is wound around the drum 5, and a central shaft 4 is provided inside the drum 5 to penetrate the first support plate 6. An anti-fall mechanism 7 is provided at the right end of the central shaft 4 to prevent the drum 5 from rotating rapidly and causing the heavy object to fall rapidly in certain circumstances such as when the brake fails or the brake fails to brake in a power outage. The anti-fall mechanism 7 includes a fixed block 701 and an anti-fall plug block 702. The fixed block 701 is fixedly installed at the right end of the central shaft 4, and is provided with a sliding cavity 706. The sliding cavity 706 is a T-shaped structure with a smooth inner wall to minimize the friction resistance between the anti-fall plug block 702 and the sliding cavity 706. The anti-falling plug block 702 is slidably embedded in the sliding cavity 706; the anti-falling plug block 702 is the core movable part of the anti-falling mechanism 7, and its shape is a T-shaped structure and matches the sliding cavity 706, so that the anti-falling plug block 702 can move back and forth in the sliding cavity 706 to perform the anti-falling task. Rectangular grooves 707 are provided on both sides of the insertion end of the anti-falling plug block 702, and a limit block 703 and a compression spring 704 are provided in the rectangular groove 707. The limit block 703 is elastically connected to the anti-falling plug block 702 through the compression spring 704; when the reel 5 rotates normally, the limit block 703 limits the anti-falling plug block 702 in the sliding cavity 706, and the centrifugal force on the anti-falling plug block 702 is equal to the blocking force of the limit block 703 and the compression spring 704.

[0040] The right side of the anti-fall mechanism 7 is rotatably connected with a locking mechanism 8; the locking mechanism 8 includes a support seat 801, a locking ring 802 and a reset assembly; the reset assembly includes a reset slide rail 804, a reset plug 805, a first transmission gear 807, a transmission shaft 808 and a second transmission gear 809; the locking ring 802 is fixedly mounted on the support seat 801 and is embedded in the outside of the anti-fall mechanism 7, and a plurality of locking protrusions 803 are arranged inside the locking ring 802, which are spaced and arranged to prevent or limit the further rotation of the anti-fall mechanism 7 under certain conditions. The size of the locking ring 802 and the size of the rotating cavity 806 are larger than the size of the anti-fall mechanism, and the locking protrusion 803 does not contact the anti-fall mechanism 7, ensuring that in the normal state (the anti-fall plug is not inserted), the anti-fall mechanism can rotate in the locking ring 802 without obstacles. At the intervals between the locking protrusions 803, reset grooves 810 are provided, which are used to cooperate with the reset plug 805 in the reset assembly to realize the reset function of the anti-fall mechanism 7. The reset assembly is provided with multiple, and the number of reset assemblies is equal to the number of reset grooves 810. A rotating cavity 806 is provided through the middle of the support seat 801, and the rotating cavity 806 is aligned with the middle of the locking ring 802 to allow the anti-fall mechanism 7 to be embedded and rotated. The reset assembly is arranged on the outer ring of the rotating cavity 806, and the support seat 801 is meshed with the composite gear 9. The reset slide rail 804 is fixedly installed on the support seat 801, providing a sliding track for the reset plug 805 to ensure its smooth movement in a specific direction. The reset plug 805 is slidably connected to the support seat 801 through the reset slide rail 804, and a rack 811 is provided on one side thereof, which is meshed with the second transmission gear 809. The other end of the reset plug 805 is slidably connected to the locking ring 802 through the reset groove 810. The first transmission gear 807 is meshedly connected with the inner gear ring 902 of the compound gear 9 to receive the rotational power from the compound gear 9. A second support plate 10 is rotatably connected to one side of the compound gear 9; the compound gear 9 includes an outer gear 901 and an inner gear ring 902, wherein the inner gear ring 902 is fixed to one side of the outer gear 901; the outer gear 901 is meshedly connected with a driving assembly 11; the driving assembly 11 includes a driving gear 1101 and a driving motor 1102; the driving motor 1102 serves as a power source, and its output shaft is fixedly connected to the driving gear 1101 to ensure that the rotational power of the driving motor 1102 can be directly transmitted to the driving gear 1101. The driving gear 1101 is meshedly connected with the outer gear 901 part of the compound gear 9. When the driving motor 1102 is started and rotated, the driving gear 1101 is driven to rotate through the output shaft.Due to the meshing relationship between the driving gear 1101 and the outer gear 901, the rotation of the driving gear 1101 will drive the inner gear ring 902 of the compound gear 9 to rotate synchronously through the outer gear 901 of the compound gear 9, thereby driving the first transmission gear 807 to rotate. The second transmission gear 809 is fixedly connected to the first transmission gear 807 through the transmission shaft 808 to form a part of the transmission chain, and the rotation of the first transmission gear 807 is transmitted to the rack 811 on the reset block 805, thereby driving the movement of the reset block 805, so that the reset block 805 can push the anti-fall block 702 when driven to change the locking state and reset the anti-fall block 702 to its original position.

[0041] A reciprocating screw 14 and a limit sliding assembly 16 are provided below the first support plate 6, and the right end of the reciprocating screw 14 passes through the first support plate 6, and an anti-falling auxiliary mechanism 13 is provided at the through end of the reciprocating screw 14. The anti-falling auxiliary mechanism 13 includes an outer box 1301; rope holes 1302 are provided above and below the outer box 1301 for the wire rope 15 to pass in and out. A reciprocating nut 1303 is fixedly installed on the rear side of the outer box 1301, and the reciprocating nut 1303 is sleeved on the reciprocating screw 14, and a reciprocating thread matching the reciprocating nut 1303 is provided on the reciprocating screw 14. When the reciprocating screw 14 rotates, the reciprocating nut 1303 and the outer box 1301 are driven to reciprocate along the direction of the reciprocating screw 14 by the action of the thread. Through the synergistic effect of the above structures, the anti-fall auxiliary mechanism 13 plays a key guiding and stabilizing role in the winding process of the wire rope 15, ensuring that the wire rope 15 can be wound on the drum 5 according to the predetermined path and sequence, effectively avoiding the disorder of the wire rope 15 in the winding process of the drum 5, thereby significantly improving the arrangement effect and use reliability of the wire rope 15, and further avoiding the performance degradation or safety hazards caused by the disorder of winding. At the same time, the mechanism also improves the automation degree and operation convenience of the entire system, and reduces the demand and cost of manual intervention.

[0042] The anti-fall auxiliary mechanism 13 also includes a fixed pulley 1304 and a transmission bar 1311; two pulley shafts 1305 are fixed side by side inside the outer box 1301, and the two fixed pulleys 1304 are installed side by side inside the outer box 1301 through the pulley shafts 1305. The wire rope 15 passes through the rope hole 1302 above the outer box 1301, and passes through the rope hole 1302 below the outer box 1301 after being wound around the fixed pulley 1304. A first claw 1309 and a second claw 1310 are rotatably mounted on one side of the fixed pulley 1304. The rotating ends of the first claw 1309 and the second claw 1310 are centrally symmetrical with respect to the pulley shaft 1305. The rotating end of the first claw 1309 and the claw end of the second claw 1310 are rotatably connected through the two ends of the transmission bar 1311 to form a linkage mechanism. When the rotating end of the first claw 1309 rotates, the claw end of the second claw 1310 is driven to rotate synchronously through the transmission bar 1311. A magnet block 1313 is fixedly mounted on one side of the fixed pulley 1304. One end of the magnet block 1313 is provided with a magnetic surface for generating magnetic attraction, and the other end is connected to a response spring 1312. One end of the response spring 1312 is directly fixed to the non-magnetic end of the magnet block 1313, and the other end is connected to the rotating end of the second claw 1310. This connection allows the response spring 1312 to recover its original shape from the compressed state according to the force (such as the change of centrifugal force), thereby driving the movement of the second claw 1310. A fixed base 1306 is fixedly installed inside the outer box 1301, and a limit clamp ring 1307 is provided on the fixed base 1306. The inner ring of the limit clamp ring 1307 is provided with a plurality of blocks 1308. These blocks 1308 are used to capture and limit the movement of the first and second claws 1310 under specific conditions. The pulley shaft 1305 passes through the middle of the limit clamp ring 1307. The claw end of the first claw 1309 is kept in contact with the magnetic surface of the magnet block 1313 through magnetic attraction. Under normal circumstances, the centrifugal force on the first claw 1309, the elastic force of the response spring 1312 and the magnetic attraction of the magnet block 1313 reach a balance of forces, so that the first claw 1309 remains in a locked state. When the drum 5 rotates rapidly and the wire rope 15 falls rapidly under the action of the weight, the centrifugal force on the first claw 1309 becomes larger and the balance is broken. Under the action of centrifugal force and elastic force, the first claw 1309 breaks away from the magnetic attraction of the magnet block 1313 and is clamped in the clamping block 1308; at this time, the second claw 1310 is also clamped in the clamping block 1308 under the action of the elastic force of the spring and the transmission bar 1311, so as to limit the rapid rotation of the fixed pulley 1304. Under certain conditions, it can respond quickly and change the rolling friction into sliding friction, thereby playing a role in assisting in alleviating the anti-falling effect.

[0043] The limit sliding assembly 16 includes a limit sliding rod 1601 and a limit sliding block 1602. The limit sliding block 1602 is slidably mounted on the limit sliding rod 1601. The limit sliding rod 1601 is fixedly installed horizontally between the first support plates 6 and is located below the reciprocating screw rod 14. The limit sliding rod 1601 serves as a sliding track for the limit sliding block 1602 to ensure that the limit sliding block 1602 can slide stably along its direction. The limit sliding block 1602 is slidably mounted on the limit sliding rod 1601 and is fixedly connected to the lower side of the anti-falling auxiliary mechanism 13. When the anti-falling auxiliary mechanism 13 moves with the reciprocating screw rod 14, the limit sliding block 1602 slides on the limit sliding rod 1601 accordingly, playing a role of guiding and limiting.

[0044] A synchronous transmission assembly 12 is provided on the right side of the central rotating shaft 4; the synchronous transmission assembly 12 includes a first transmission wheel 1201, a transmission belt 1202 and a second transmission wheel 1203; the first transmission wheel 1201 is fixedly mounted on the right side of the central rotating shaft 4 and is located on the left side of the anti-fall mechanism 7; the second transmission wheel 1203 is fixedly mounted on the right end of the reciprocating screw 14; the transmission belt is respectively sleeved on the first transmission wheel 1201 and the second transmission wheel 1203. The rotation of the reel 5 directly drives the first transmission wheel 1201 to rotate synchronously, and then the rotational power is transmitted to the second transmission wheel 1203 through the close cooperation of the transmission belt 1202, so as to cause the second transmission wheel 1203 and the reciprocating screw 14 connected thereto to rotate. The reciprocating thread on the reciprocating screw 14 is closely meshed with the thread in the reciprocating nut 1303, driving the reciprocating nut 1303 to move linearly along the axial direction of the screw, and finally driving the anti-fall auxiliary mechanism 13 to achieve its smooth movement in the left and right directions.

[0045] The present invention can explain its anti-fall function principle through the following operation mode:

[0046] When the drum 5 rotates normally, the limit block 703 limits the anti-falling plug 702 in the sliding cavity 706. At this time, the centrifugal force on the anti-falling plug 702 is equal to the blocking force of the limit block 703 and the compression spring 704, that is, the three are in a state of force balance, and the anti-falling plug 702 is completely in the sliding cavity 706 and rotates with the fixed block 701. In abnormal circumstances (such as the rapid rotation of the drum 5 causing the wire rope 15 to fall rapidly), when the drum 5 rotates too fast, the anti-falling mechanism 7 is triggered, and the anti-falling plug 702 is affected by the increased centrifugal force, the balance state is broken, the limit block 703 is pressed into the rectangular groove 707, and the anti-falling plug 702 slides out of the sliding cavity 706 and is inserted into the interval of the locking protrusion 803, thereby limiting the rotation of the drum 5. At the same time, the anti-falling auxiliary mechanism 13 is triggered, and the first clamping claw 1309 breaks the balance due to the increase of centrifugal force, and breaks away from the magnetic attraction of the magnet block 1313. Then, under the joint action of the centrifugal force and the elastic force of the response spring 1312, it is clamped into the clamping block 1308 of the limit clamp ring 1307 to achieve preliminary locking. With the action of the first clamping claw 1309, the further deformation of the response spring 1312 drives the second clamping claw 1310 to move to the clamping block 1308 through the transmission bar 1311 and clamp it, forming a double lock, which more effectively limits the rapid rotation of the fixed pulley 1304, thereby changing the rolling friction into sliding friction, achieving a rapid response and effective deceleration under specific conditions, thereby assisting in preventing the heavy object from falling sharply due to the rapid release of the wire rope 15. The two work together to prevent the rapid rotation of the drum 5 and the rapid fall of the heavy object in the case of power outage or brake abnormality.

[0047] After the anti-fall plug 702 is stopped by the locking protrusion 803, the anti-fall plug 702 can be restored to the initial position by the reset assembly, so as to re-activate or adjust the anti-fall mechanism 7. The driving motor 1102 is started, and the outer gear 901 of the composite gear 9 is driven to rotate through the driving gear 1101. The inner gear ring 902 of the composite gear 9 is meshed with the first transmission gear 807, and then the rotational power is transmitted to the second transmission gear 809. The second transmission gear 809 is meshed with the rack 811 on the reset plug 805, driving the reset plug 805 to move along the reset slide rail 804 to push the anti-fall plug 702 back into the sliding cavity 706 of the fixed block 701. At this time, the limit block 703 pops up again, and the anti-fall plug 702 is confined in the sliding cavity 706. Then, under the reverse driving action of the driving motor 1102, the reset component also returns to the initial state, and the first claw 1309 and the second claw 1310 of the anti-fall auxiliary mechanism 13 are manually reset, ready to respond again when needed next time.

[0048] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A crane hoisting mechanism, comprising a reducer (1), a coupling (2), a hoisting motor (3), and a drum (5), wherein the hoisting motor (3) is connected to the reducer (1) via the coupling (2), and the reducer (1) is connected to the drum (5) via the coupling (2); characterized in that: The drum (5) is provided with a first support plate (6) on both sides, a steel wire rope (15) is wound on the drum (5), a central shaft (4) penetrating the first support plate (6) is provided inside the drum (5), and an anti-fall mechanism (7) is provided at the right end of the central shaft (4); the anti-fall mechanism (7) comprises a fixed block (701) and an anti-fall plug block (702); the fixed block (701) is fixedly installed at the right end of the central shaft (4), and a sliding cavity (706) is provided inside the fixed block (701), and the anti-fall plug block (702) is slidably embedded in the sliding cavity (706); rectangular grooves (707) are provided on both sides of the insertion end of the anti-fall plug block (702), and a limit block (703) and a compression spring (704) are provided in the rectangular groove (707), and the limit block (703) ) is elastically connected to the anti-fall plug block (702) through a compression spring (704); the right side of the anti-fall mechanism (7) is rotatably connected to a locking mechanism (8); the right side of the locking mechanism (8) is meshedly connected to a composite gear (9), and one side of the composite gear (9) is rotatably connected to a second support plate (10); the composite gear (9) includes an outer gear (901) and an inner gear ring (902), wherein the inner gear ring (902) is fixed to one side of the outer gear (901); the outer gear (901) is meshedly connected to a driving assembly (11); a synchronous transmission assembly (12) is provided on the right side of the central rotating shaft (4); a reciprocating screw (14) and a limit sliding assembly (16) are provided below the first support plate (6), and an anti-fall auxiliary mechanism (13) is provided on the reciprocating screw (14).

2. A crane hoisting mechanism according to claim 1, characterized in that: The locking mechanism (8) comprises a support seat (801), a locking ring (802) and a reset assembly; the locking ring (802) is fixedly mounted on the support seat (801) and is sleeved on the outside of the anti-fall mechanism (7); a plurality of locking protrusions (803) are arranged inside the locking ring (802), and reset grooves (810) are arranged at intervals between the locking protrusions (803); a rotating cavity (806) is provided through the middle of the support seat (801), the rotating cavity (806) is aligned with the middle of the locking ring (802), the size of the rotating cavity (806) and the locking ring (802) is larger than the size of the anti-fall mechanism (7), and the locking protrusions (803) do not contact the anti-fall mechanism (7); the reset assembly is arranged on the outer ring of the rotating cavity (806), and the support seat (801) is meshedly connected with the composite gear (9).

3. A crane hoisting mechanism according to claim 2, characterized in that: The reset assembly comprises a reset rail (804), a reset plug (805), a first transmission gear (807), a transmission shaft (808) and a second transmission gear (809); the first transmission gear (807) is meshedly connected with the inner gear ring (902) of the composite gear (9); the reset rail (804) is fixedly mounted on the support seat (801), and the reset plug (805) is slidably connected to the support seat (801) via the reset rail (804); a rack (811) is provided on one side of the reset plug (805), and the rack (811) is meshedly connected with the second transmission gear (809); the reset plug (805) is slidably connected with the locking ring (802) via the reset groove (810); and the second transmission gear (809) is fixedly connected with the first transmission gear (807) via the transmission shaft (808).

4. A crane hoisting mechanism according to any one of claims 2 or 3, characterized in that: There are multiple reset components, and the number of reset components is equal to the number of reset grooves (810).

5. A crane hoisting mechanism according to claim 1, characterized in that: The anti-fall auxiliary mechanism (13) comprises an outer box body (1301); the upper side and the lower side of the outer box body (1301) are both provided with rope threading holes (1302); a reciprocating nut (1303) is fixedly installed on the rear side of the outer box body (1301), and the reciprocating nut (1303) is sleeved on the reciprocating screw rod (14).

6. A crane hoisting mechanism according to claim 4, characterized in that: The anti-fall auxiliary mechanism (13) further comprises a fixed pulley (1304) and a transmission bar (1311); two pulley shafts (1305) are fixedly arranged side by side inside the outer box (1301); the pulley shafts (1305) are rotatably connected to the fixed pulley (1304), and a steel wire rope (15) is wound around the fixed pulley (1304); a first clamping claw (1309) and a second clamping claw (1310) are rotatably mounted on one side of the fixed pulley (1304); the rotating ends of the first clamping claw (1309) and the second clamping claw (1310) are symmetrical about the pulley shaft (1305); the rotating end of the first clamping claw (1309) and the clamping claw end of the second clamping claw (1310) are connected to each other through the transmission bar (1311). ) are rotatably connected at both ends; a magnet block (1313) is fixedly mounted on one side of the fixed pulley (1304), and a response spring (1312) is fixedly mounted on the non-magnetic end of the magnet block (1313); the claw end of the first claw (1309) is magnetically attracted to one end of the magnetic surface of the magnet block (1313), and the other end of the response spring (1312) is fixedly mounted on the rotating end of the second claw (1310); a fixed base (1306) is fixedly mounted inside the outer box body (1301), a limit clamping ring (1307) is provided on the fixed base (1306), and a plurality of clamping blocks (1308) are provided on the inner ring of the limit clamping ring (1307), and the pulley shaft (1305) passes through the middle of the limit clamping ring (1307).

7. A crane hoisting mechanism according to claim 1, characterized in that: The driving assembly (11) comprises a driving gear (1101) and a driving motor (1102); the output shaft of the driving motor (1102) is fixedly connected to the driving gear (1101), and the driving gear (1101) is meshingly connected to the outer gear (901) of the composite gear (9).

8. The crane hoisting mechanism according to claim 1, characterized in that: The sliding cavity (706) and the anti-fall plug block (702) are T-shaped; a moving ball (705) is provided on the front side of the insertion end of the anti-fall plug block (702); the reciprocating screw rod (14) is installed for transverse rotation below the first support plate (6), and the right end of the reciprocating screw rod (14) passes through the first support plate (6); and a reciprocating thread is provided on the reciprocating screw rod (14).

9. A crane hoisting mechanism according to claim 1, characterized in that: The limiting sliding assembly (16) comprises a limiting sliding rod (1601) and a limiting sliding block (1602), wherein the limiting sliding block (1602) is slidably sleeved on the limiting sliding rod (1601); the limiting sliding rod (1601) is transversely fixedly installed between the first support plates (6) and is located below the reciprocating screw rod (14); the limiting sliding block (1602) is fixedly connected to the lower side of the anti-falling auxiliary mechanism (13).

10. The crane hoisting mechanism according to claim 1, characterized in that: The synchronous transmission assembly (12) comprises a first transmission wheel (1201), a transmission belt (1202) and a second transmission wheel (1203); the first transmission wheel (1201) is fixedly mounted on the right side of the central rotating shaft (4) and is located on the left side of the anti-falling mechanism (7); the second transmission wheel (1203) is fixedly mounted on the right end of the reciprocating screw rod (14); and the transmission belts are respectively sleeved on the first transmission wheel (1201) and the second transmission wheel (1203).

Images