Crane roller

Abstract

The invention provides a crane winding drum, and relates to the technical field of crane winding drums, the crane winding drum comprises a crane winding drum main body, a reciprocating guide assembly and a rope guide assembly, the reciprocating guide assembly comprises a reciprocating screw rod, and the rope guide assembly comprises two guide arms, a trapezoidal block, two pulleys, a supporting arm, two first sliding blocks, a seat plate, a driving arm and a multi-stage electric push rod; annular grooves are formed in the surfaces of the two pulleys; in the process that a reciprocating guide assembly controls a rope guide assembly to reciprocate along the axis of a reciprocating lead screw, a multi-stage electric push rod retracts one stage to control a driving arm to move between two guide arms, and the inclined face of a right trapezoid at one end of the driving arm is matched with the inclined face of the bottom of a trapezoid block; the two guide arms are pulled to slide in one end of the supporting arm, so that the guide arms carry the two pulleys to be away from each other, the crane roller body is conveniently guided to wind the rope to the next layer, the rope can be sequentially wound circle by circle and layer by layer, and the crane roller is convenient to adapt to ropes with different lengths.

Description

Technical Field

[0001] The invention relates to the technical field of crane drums, in particular to a crane drum. Background Art

[0002] A crane is a multi-functional machine capable of vertically lifting and horizontally transporting heavy objects within a certain range. Some lifting equipment features intermittent motion, meaning that the corresponding mechanisms for retrieving, transporting, and unloading alternate within a single cycle. Cranes are becoming increasingly widespread in the market. Accidents often occur when lifting without outriggers and traveling with a load, and their speed is faster than crawler cranes. They offer stable operation, a large lifting capacity, and can travel with a load within a specific range. However, the road must be smooth and firm, the tire pressure must meet requirements, and the crane must not exceed 50 cm above the ground. Long-distance travel with a load is prohibited. To ensure operational safety, lifting without outriggers is generally prohibited in China. Wire ropes used with cranes include phosphate-coated, galvanized, and smooth-surfaced wire ropes.

[0003] Lifting machinery used in bridge construction projects can generally be divided into four categories based on their structure and performance: light and small lifting equipment, bridge-type lifting machinery, jib-type cranes, and cable cranes. Light and small lifting equipment includes jacks, pneumatic hoists, electric hoists, balance hoists (also known as balance cranes), and winches. Bridge-type lifting machinery includes beam cranes. Jib-type cranes include fixed slewing cranes, tower cranes, truck cranes, tire cranes, and crawler cranes. Cable cranes include elevators. Based on their structural form, cranes are mainly divided into light and small lifting equipment, bridge-type (bridge and gantry cranes), jib-type (self-propelled, tower, portal, railway, floating, and mast cranes), and cable cranes.

[0004] The structure of a crane generally consists of three main parts: the frame; the mechanism (including the hoisting mechanism, operating mechanism, rotating mechanism, and luffing mechanism); and the control system. The hoisting mechanism usually consists of a main transmission device connected by a belt clutch or gears. During operation, the hoist drum rotates forward and reverse, retracting and releasing the drum wire rope, and raising and lowering the hook.

[0005] The patent document with announcement number CN107074512B discloses a rope guiding device for a rope drum in a crane with an open modular body structure, which can easily and advantageously realize the guiding work of ropes of different sizes. When the rope drum diameter has a small range, the change of the same rope guiding device is very small, and there is no need to add more links. At the same time, the openness of the body not only allows the basic elements of the rope guiding device to be positioned inside it, but also allows the installation of limit switches, sensors and elements for keeping the rope groove clean in the open space of the body. In addition, the open setting also makes it easy to clean the rope guiding device, and the relevant components and cleaning conditions can be directly observed.

[0006] However, in the process of implementing the above technical solution, it was found that the above technical solution had the following technical problems: The rope guide device of the rope drum in this crane can realize telescopic guiding winding and releasing structures of different sizes through an open modular body structure, while maintaining visibility and easy cleaning. However, in actual application, because the rope guide device moves in a ring shape outside the crane drum and remains open, allowing the rope to pass through the interior of the rope guide device, it is difficult to wind the rope in multiple layers outside the drum, which is not conducive to meeting the requirements of different lifting heights of a single crane. Summary of the Invention

[0007] In order to overcome the shortcomings of the rope guide device of the rope drum in the existing crane in actual application, since the rope guide device is ring-shaped and moves outside the crane drum and remains in an open state for the rope to pass through the interior of the rope guide device, it is difficult to wind the rope in multiple layers outside the drum, which is not conducive to meeting the different lifting height requirements of a single crane, the embodiment of the present application provides a crane drum. When the reciprocating screw rotates, the screw rod assembly is driven to reciprocate along the axis of the reciprocating screw rod, so that the support arm fixed to the two first sliding blocks moves along the direction of the two guide long rods, so that the support arm can drive the two pulleys between the two guide arms to drive the crane drum body passing therebetween to be wound around the outside of the crane drum body one circle at a time; At the same time, when the reciprocating screw control screw assembly drives the support arm to move to one end, the multi-stage electric push rod retracts the first-level control drive arm to move between the two guide arms toward one side of the reciprocating guide assembly. With the help of the inclined surface of the right-angled trapezoid at one end of the drive arm and the inclined surface at the bottom of the trapezoidal block, the two guide arms are pulled to slide inside one end of the support arm, so that the guide arm carries the two pulleys away, which is convenient for guiding the crane drum body to reel in the rope to the next layer, which is conducive to orderly reeling in the rope one circle and layer by layer, and is convenient for adapting to ropes of different lengths.

[0008] The technical solution adopted by the embodiment of the present application to solve the technical problem is: A crane drum comprises a crane drum body, a reciprocating guide assembly and a rope guide assembly, wherein the reciprocating guide assembly is arranged on the top of the crane drum body; The rope guide assembly is arranged on one side of the crane drum body; A reducer assembly and a support seat are respectively provided at both ends of the crane drum body, and a motor parallel to the axis of the crane drum body is provided at the bottom of one end of the reducer assembly; The reciprocating guide assembly includes a reciprocating screw, both ends of the reciprocating screw are integrally formed with a support shaft, the outside of the reciprocating screw is sleeved with a screw sleeve, the inside of the screw sleeve is assembled and connected with a limit head extending into the inside of the reciprocating screw groove, the bottom of the screw sleeve is assembled and connected with a second sliding block, and both ends of the second sliding block are provided with a guide rod parallel to the reciprocating screw; The rope guide assembly includes two guide arms, one end of the two guide arms is integrally formed with the same trapezoidal block, two pulleys are arranged between the ends of the two guide arms away from the trapezoidal block, and annular grooves are provided on the surfaces of the two pulleys, and the outside of the two guide arms is provided with the same support arm, and the end of the support arm away from the trapezoidal block is assembled with two first sliding blocks, the outer surface of the support arm is integrally formed with a seat plate, and a driving arm is slidably connected between the tops of the two guide arms, one end of the driving arm is in a right-angled trapezoid and is adapted to be connected between the bottom surfaces of the trapezoidal blocks, and a multi-stage electric push rod is assembled between the end of the driving arm away from the trapezoidal block and the surface of the seat plate; Among them, the two first sliding blocks are respectively located on both sides of the second sliding block, and the interiors of the two second sliding blocks and one first sliding block pass through two assembly short rods together, and nuts are connected at both ends of the assembly short rods to fix the second sliding block and the first sliding block. When the reciprocating screw is in a rotating state, the screw rod kit drives the second sliding block and the first sliding block to move back and forth along the direction of the reciprocating screw rod axis by utilizing the cooperation between the limit head and the surface groove, and the second sliding block slides on the outside of the two guide long rods, so that the screw rod kit drives the second sliding block and the first sliding block to move back and forth along the direction of the reciprocating screw rod axis, and controls the support arm to drive the two pulleys between the two guide arms at the bottom of the trapezoidal block to move, changing the position of the rope passing between the two pulleys and winding around the surface of the crane drum body.

[0009] In one possible implementation, one end of the motor shaft is connected to the gear transmission inside the reducer assembly and passes through the interior of the reducer assembly, and the part of the motor shaft passing through the reducer assembly is assembled and connected to a first pulley; an extension shaft is integrally formed at one end of the support shaft, and the outside of the extension shaft is pin-connected to a second pulley, and the outsides of the first pulley and the second pulley are commonly connected to a transmission belt.

[0010] In one possible implementation, a stand is provided on the outside of one end of the two supporting shafts, and the bottom of one of the stands is assembled and connected to a seat frame; the two guide long rods are symmetrically arranged on both sides of the bottom of the reciprocating screw rod, and the two ends are respectively assembled and fixed to the two stands, and the other stand is assembled to the top of the reducer assembly, and the seat frame is assembled to the top of the support seat, supporting the rotating reciprocating screw rod to drive the rope guide assembly connected to the second sliding block to move along the direction of the axis of the crane drum body.

[0011] In one possible implementation, the guide arm and the support arm remain in a vertical state, and the angle between the two guide arms and the horizontal plane is forty-five degrees, and the distance between the inner surface of the support arm and the side surface of the guide arm close to the crane drum body and the axis of the crane drum body are the same.

[0012] In a possible implementation, the rope passes between the two pulleys in a vertical state, and the connecting point of the annular grooves on the two pulleys is vertically projected onto a plane to form a circle.

[0013] In one possible implementation, a filling block is assembled and connected between the middle parts of the two guide arms, a spring is provided between the top of the filling block and the bottom of one end of the support arm, and the top and bottom of the spring are both welded with screws; one of the screws is threadedly connected to the inside of the support arm, and the other screw is threadedly connected to the inside of the filling block.

[0014] In one possible implementation, the inner angle of the support arm is one hundred and thirty-five degrees, the support arm is divided into a horizontal section and an inclined section, a strip groove is provided at the bottom of the driving arm, and a limiting bar is integrally formed on the outer inclined surface of the support arm; the driving arm is slidably connected to the outside of the limiting bar through the strip groove, and the bottoms of both ends of the first sliding block are buckled to the top of the guide long rod at the corresponding position through the arc-shaped strip grooves.

[0015] In a possible implementation, the exteriors of the second pulley and the first pulley are machined into gear shapes, and the interior of the transmission belt is machined with a rack meshing with the second pulley and the first pulley.

[0016] In a possible implementation, the exterior of the extension shaft and the exterior of the portion of the motor shaft extending from the reducer assembly are equipped with mutually meshing gears.

[0017] In one possible implementation, a mounting block is provided at the bottom of each of the two supporting shafts, and a proximity switch is assembled and connected internally of the mounting block; the two proximity switches are arranged facing each other, and the second sliding block carries the two first sliding blocks to move between the two proximity switches. The processor monitors the position of the second sliding block with the help of the two proximity switches to control the extension status of multiple sections of the multi-stage electric push rod.

[0018] The beneficial effects of this application are: First, in this solution, when the reciprocating screw rotates, the screw assembly is driven to reciprocate along the axis of the reciprocating screw, so that the support arm fixed to the two first sliding blocks moves along the direction of the two guide long rods, which can support the support arm to drive the two pulleys between the two guide arms to drive the crane drum body passing therebetween to be wound around the outside of the crane drum body in circles; At the same time, when the reciprocating screw control screw assembly drives the support arm to move to one end, the multi-stage electric push rod retracts the first-level control driving arm to move between the two guide arms to one side of the reciprocating guide assembly. With the help of the inclined surface of the right-angled trapezoid at one end of the driving arm and the inclined surface at the bottom of the trapezoidal block, the two guide arms are pulled to slide inside one end of the support arm, so that the guide arm carries the two pulleys away, which is convenient for guiding the crane drum body to reel in the rope to the next layer, which is conducive to orderly reeling in the rope one circle at a time and layer by layer, and is convenient for adapting to ropes of different lengths. Secondly, in this solution, two proximity switches in a facing state are simultaneously set at the bottom of the two supporting shafts. When the rotating reciprocating screw drives the screw assembly to drive the second sliding block and the first sliding block to reciprocate outside the two guide long rods, the positions are monitored by the two proximity switches. With the help of the starting state of the two proximity switches, the multi-stage movable ends on the multi-stage electric push rod can be gradually retracted into the interior of the fixed end, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the overall structural diagrams of a crane drum according to the present invention; Figure 2 This is the second schematic diagram of the overall structure of a crane drum according to the present invention; Figure 3 A crane drum according to the present invention Figure 2 A magnified schematic diagram of part A in the middle; Figure 4 This is a schematic diagram of the connection structure of a crane drum rope guide assembly and a reciprocating guide assembly according to the present invention; Figure 5 This is a structural schematic diagram of a crane drum reciprocating guide assembly according to the present invention; Figure 6 This is a structural schematic diagram of a crane drum support arm and a first sliding block in a disconnected state according to the present invention; Figure 7 This is a cross-sectional view of a crane drum support arm according to the present invention; Figure 8 A top view of a crane drum rope guide assembly and a crane drum body in a connected state according to the present invention; Figure 9 This is a left side view of a crane drum with a rope guide assembly and a crane drum body connected; Figure 10 This is a rear view of a crane drum in which a rope guide assembly and a crane drum body are connected.

[0020] Reference numerals: 1. Motor; 2. First pulley; 3. Reducer assembly; 4. Drive belt; 5. Mounting block; 6. Rope guide assembly; 601. Guide arm; 602. Drive arm; 603. Trapezoidal block; 604. Support arm; 605. First sliding block; 606. Multi-stage electric push rod; 607. Pulley; 608. Filling block; 609. Spring; 610. Screw; 611. Seat plate; 612. Limiting bar; 7. Reciprocating guide assembly; 701. Stand; 702. Second sliding block; 703. Long guide rod; 704. Reciprocating screw rod; 705. Screw rod kit; 706. Support shaft; 707. Limiting head; 708. Assembly short rod; 8. Second pulley; 9. Support seat; 10. Seat frame; 11. Crane drum body; 12. Proximity switch; 13. Arc groove; 14. Annular groove; 15. Strip groove. DETAILED DESCRIPTION

[0021] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Example

[0022] This embodiment introduces a specific structure of a crane drum. Figure 1 、 Figure 2 、 Figures 4 to 9 As shown, it includes a crane drum body 11, a reciprocating guide assembly 7 arranged on the top of the crane drum body 11, and a rope guide assembly 6 arranged on one side of the crane drum body 11. The two ends of the crane drum body 11 are respectively provided with a reducer assembly 3 and a support seat 9. The bottom of one end of the reducer assembly 3 is provided with a motor 1 parallel to the axis of the crane drum body 11; The reciprocating guide assembly 7 includes a reciprocating screw 704, with support shafts 706 integrally formed at both ends of the reciprocating screw 704. A screw assembly 705 is sleeved on the outside of the reciprocating screw 704, and a limit head 707 is assembled and connected inside the screw assembly 705, which extends into the groove of the reciprocating screw 704. The bottom of the screw assembly 705 is assembled and connected to the second sliding block 702. A guide rod 703 parallel to the reciprocating screw 704 is provided inside each end of the second sliding block 702. The rope guide assembly 6 includes two guide arms 601, one end of the two guide arms 601 is integrally formed with a same trapezoidal block 603, two pulleys 607 are provided between the ends of the two guide arms 601 away from the trapezoidal block 603, and an annular groove 14 is provided on the surface of the two pulleys 607. The outside of the two guide arms 601 is provided with a same support arm 604, and the end of the support arm 604 away from the trapezoidal block 603 is assembled and connected with two first sliding blocks 605. The first sliding block 60 The bottoms of both ends are buckled to the tops of the corresponding guide rods 703 through the arcuate grooves 13. The outer surfaces of the support arms 604 are integrally formed with a seat plate 611. A driving arm 602 is slidably connected between the tops of the two guide arms 601. One end of the driving arm 602 is in a right-angled trapezoidal shape and is adapted to be connected between the bottom surfaces of the trapezoidal blocks 603. A multi-stage electric push rod 606 is assembled and connected between the end of the driving arm 602 away from the trapezoidal blocks 603 and the surface of the seat plate 611. Among them, the two first sliding blocks 605 are respectively located on both sides of the second sliding block 702, and the interiors of the two second sliding blocks 702 and one first sliding block 605 pass through two assembly short rods 708, and nuts are connected at both ends of the assembly short rods 708 to fix the second sliding blocks 702 and the first sliding blocks 605. A stand 701 is provided on the outside of one end of the two support shafts 706, and the bottom of one stand 701 is assembled and connected to the seat frame 10. By making the two guide long rods 703 symmetrically arranged on both sides of the bottom of the reciprocating screw rod 704, and the two ends They are respectively assembled and fixed with two upright seats 701, the other upright seat 701 is assembled to the top of the reducer assembly 3, and the seat frame 10 is assembled to the top of the support seat 9. When the reciprocating screw 704 is controlled to rotate inside the two upright seats 701 (the reciprocating screw 704 is in the rotating state), the screw assembly 705 can drive the second sliding block 702 and the first sliding block 605 to reciprocate along the axis of the reciprocating screw 704 by means of the cooperation between the limit head 707 and the surface groove, and the sliding of the second sliding block 702 on the outside of the two guide long rods 703; At the same time, because one end of the support arm 604 is fixedly assembled with one end of the two first sliding blocks 605, when the rotating reciprocating screw 704 drives the screw assembly 705 to move along the direction of its axis, the rope guide assembly 6 connected to the second sliding block 702 can be moved along the direction of the axis of the crane drum body 11, so that the rope guide assembly 6 reciprocates on one side of the crane drum body 11 to wind the rope around the outside of the crane drum body 11, changing the position of the rope passing between the two pulleys 607 and winding around the surface of the crane drum body 11, so that the rope is wound around the outside of the crane drum body 11 in turns; In addition, the connecting point of the annular grooves 14 on the two pulleys 607 is circular when vertically projected onto a plane, which is conducive to the rope passing between the two pulleys 607 in a vertical state; Secondly, by making the inner angle of the support arm 604 135 degrees, the support arm 604 is divided into a horizontal section and an inclined section. The horizontal section is assembled and fixed to one end of the two first sliding blocks 605, while the inclined section is connected to the two guide arms 601 at the bottom of the trapezoidal block 603. The guide arms 601 and the support arm 604 remain in a vertical state, and the angle between the two guide arms 601 and the horizontal plane is 45 degrees. By making the distance between the inner surface of the support arm 604 and the side surface of the guide arm 601 close to the crane drum body 11 and the axis of the crane drum body 11 the same, it is possible to leave a maximum gap between the support arm 604 and the surface of the crane drum body 11, as well as between the guide arm 601 and the surface of the crane drum body 11, while maintaining the maximum number of layers of winding on the outside of the crane drum body 11. Furthermore, the multi-stage electric push rod 606 controls the driving arm 602 to move between the two guide arms 601 toward one side of the reciprocating guide assembly 7. With the help of the right-angled trapezoidal slope at one end of the driving arm 602 and the bottom slope of the trapezoidal block 603, the trapezoidal block 603 is pushed to move away from the inclined section of the support arm 604, and the two guide arms 601 are pulled to slide inside the inclined section of the support arm 604, so that the guide arms 601 and the two pulleys 607 are moved away, which facilitates the guidance of the crane drum body 11 to reel in the rope to the next layer (such as Figure 9 shown); Furthermore, in order to ensure that the bottom surface of the driving arm 602 always fits in with the outer surface of the supporting arm 604, Figure 7 and Figure 9 As shown, a strip groove 15 is formed at the bottom of the driving arm 602, and a limiting bar 612 is integrally formed on the outer inclined surface of the support arm 604. By slidingly connecting the driving arm 602 to the outside of the limiting bar 612 via the strip groove 15, the surface of the driving arm 602 can be limited from being disconnected from the surface of the support arm 604. In some examples, one end of the motor 1 shaft is connected to the gear transmission inside the reducer assembly 3 and passes through the reducer assembly 3. The portion of the motor 1 shaft passing through the reducer assembly 3 is assembled and connected to the first pulley 2. An extension shaft is integrally formed at one end of a support shaft 706. The exterior of the extension shaft is pin-connected to the second pulley 8. The exteriors of the first pulley 2 and the second pulley 8 are commonly connected to a transmission belt 4. Among them, when the motor 1 works and controls the gear assembly inside the reducer assembly 3 through its rotating shaft to rotate the crane drum body 11 between the support seat 9 and the reducer assembly 3, the first pulley 2 can be controlled to rotate by means of its rotating shaft. The first pulley 2 drives the extension shaft through the transmission belt 4 connected between the first pulley 2 and the second pulley 8, so that the support shaft 706 drives the reciprocating screw rod 704 to rotate. The same motor 1 can provide power for the rotation of the crane drum body 11 and the reciprocating screw rod 704 at the same time, which is conducive to keeping the crane drum body 11 and the reciprocating screw rod 704 in a synchronous rotation state; Secondly, the outside of the second pulley 8 and the first pulley 2 are processed into a gear type, and the inside of the transmission belt 4 is processed with a rack that meshes with the second pulley 8 and the first pulley 2, which is beneficial to prevent the transmission belt 4 from slipping when connected between the second pulley 8 and the first pulley 2; Furthermore, the outer portion of the extension shaft and the outer portion of the rotating shaft of the motor 1 passing through the reducer assembly 3 are equipped with meshing gears. The meshing of the gears can ensure transmission efficiency (but the distance between the two needs to be taken into consideration); In some examples, a shim block 608 is assembled and connected between the middle portions of the two guide arms 601, a spring 609 is provided between the top of the shim block 608 and the bottom of one end of the support arm 604, and screws 610 are welded to the top and bottom of the spring 609; Among them, by threading one screw 610 into the inside of the support arm 604 and threading another screw 610 into the inside of the shim block 608, the spring 609 is supported between the shim block 608 and the surface of the support arm 604. The shim block 608 can be used to pull the two guide arms 601 to make the trapezoidal block 603 and the drive arm 602 close to each other, preventing the rope from passing between the two pulleys 607 and driving the guide arm 601 to slide inside the inclined section of the support arm 604.

[0023] The above design first uses the motor 1 to drive the gear assembly inside the reducer assembly 3 to rotate the crane drum body 11 between the support seat 9 and the reducer assembly 3. The rotating crane drum body 11 can be used to retract and release the rope thereon. On the other hand, the rotation shaft of the motor 1 controls the rotation of the first pulley 2, and the first pulley 2 drives the extension shaft via the transmission belt 4 connected between the first pulley 2 and the second pulley 8, so that the support shaft 706 drives the reciprocating screw 704 to rotate. This facilitates the use of the same motor 1 to provide power for the rotation of the crane drum body 11 and the reciprocating screw 704 at the same time, which is conducive to maintaining the crane drum body 11 and the reciprocating screw 704 in a synchronous rotation state. Then, when the reciprocating screw 704 is in a rotating state inside the two upright seats 701, with the cooperation of the limit head 707 and the surface groove, and the sliding of the second sliding block 702 outside the two guide rods 703, the screw assembly 705 can drive the second sliding block 702 and the first sliding block 605 to reciprocate along the axis of the reciprocating screw 704; At the same time, because one end of the support arm 604 is fixedly assembled with one end of the two first sliding blocks 605, when the rotating reciprocating screw 704 drives the screw assembly 705 to move along its axis, the support arm 604 fixedly assembled with the second sliding block 702 drives the trapezoidal block 603 at one end thereof and the guide arm 601 to move along the axis of the crane drum body 11, thereby driving the two pulleys 607 between the two guide arms 601 to drive the crane drum body 11 passing therebetween to be wound around the outside of the crane drum body 11 one by one. In addition, when the reciprocating screw 704 rotates to cause the screw assembly 705 to move from one end to the other and back, the multi-stage electric push rod 606 retracts one level (based on the step-by-step contraction and extension of the multi-stage electric push rod 606) to control the driving arm 602 to move toward one side of the reciprocating guide assembly 7 between the two guide arms 601. With the help of the inclined surface of the right-angled trapezoid at one end of the driving arm 602 and the inclined surface at the bottom of the trapezoidal block 603, the trapezoidal block 603 is pushed to move in the direction away from the inclined section of the support arm 604, pulling the two guide arms 601 to slide inside one end of the support arm 604, so that the guide arm 601 carries the two pulleys 607 away, making it easier to guide the crane drum body 11 to reel in the rope to the next layer and keep it wound around the outside of the crane drum body 11 in circles. Example

[0024] Based on Example 1, this example introduces the related structures of the reciprocating guide assembly 7 and the rope guide assembly 6. Figures 1 to 3 、 Figure 10As shown, one end of the driving arm 602 is in a right-angled trapezoidal shape and is adapted to be connected between the bottom surfaces of the trapezoidal block 603. A multi-stage electric push rod 606 is assembled and connected between the end of the driving arm 602 away from the trapezoidal block 603 and the surface of the base plate 611. The bottom of the two supporting shafts 706 is provided with a mounting block 5, and the interior of the mounting block 5 is assembled and connected with a proximity switch 12; The multi-stage electric push rod 606 is typically composed of multiple telescopic guide rods or sliders of varying lengths. The motor drives the reducer, which then transmits power step by step through a screw or gear set. For example, in a three-stage structure, the first fixed stage contains core components such as the motor and controller, while the second and third stages extend in stages via ropes or threaded connections. When the push rod reaches the set travel distance, a limit switch cuts off the power supply and stops the movement. Secondly, the two proximity switches 12 are arranged facing each other. When the second sliding block 702 carries the two first sliding blocks 605 and moves between the two proximity switches 12, the processor monitors the position of the first sliding block 605 with the help of the two proximity switches 12 to control the multi-stage electric push rod 606 to extend in multiple sections. When any proximity switch 12 detects that the second sliding block 702 is approaching, the reciprocating screw 704 can be rotated inside the two stands 701. With the help of the cooperation between the limit head 707 and the surface groove, and the second sliding block 702 slides outside the two guide rods 703, the screw rod kit 705 drives the second sliding block 702 and the first sliding block 605 to move back and forth along the direction of the axis of the reciprocating screw 704. The position of the rope guide assembly 6 is judged according to the starting state of the proximity switch 12, which is convenient for controlling the state of the multiple movable ends in the multi-stage electric push rod 606 to extend step by step.

[0025] The above design simultaneously sets two proximity switches 12 in a facing state at the bottom of the two supporting shafts 706. When the rotating reciprocating screw 704 drives the screw assembly 705 to drive the second sliding block 702 and the first sliding block 605 to reciprocate outside the two guide long rods 703, the positions are monitored by the two proximity switches 12. With the help of the activation state of the two proximity switches 12, the multi-stage movable ends on the multi-stage electric push rod 606 can be gradually retracted into the interior of the fixed end, so that the trapezoidal block 603 can be pulled by the driving arm 602 to make the two guide arms 601 slide inside the support arm 604, thereby controlling the state of the two pulleys 607 away from the crane drum body 11, thereby adapting to the number of layers of rope wound to the outside of the crane drum body 11.

[0026] It is worth noting that the linkage control between the multi-stage electric linear actuator 606 and the two proximity switches 12 can be based on the same processor, or independent circuit systems can be set up for the two proximity switches 12 and connected in series with the power supply system on the multi-stage electric linear actuator 606. When the proximity switch 12 detects that the first sliding block 605 has reached the target position, the power supply circuit of the multi-stage electric linear actuator 606 is connected, so that the two proximity switches 12 can jointly control the operation of the multi-stage electric linear actuator 606. Only some control contents are exemplified here, and the specific control scheme between the two proximity switches 12 and the multi-stage electric linear actuator 606 is not limited. Any control scheme that can achieve the relevant functions can be used for reference and application.

[0027] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A crane drum, characterized in that: include: Crane drum body (11); A reciprocating guide assembly (7) disposed on the top of the crane drum body (11); A rope guide assembly (6) is provided on one side of the crane drum body (11); The rope guide assembly (6) includes two guide arms (601), one end of the two guide arms (601) is integrally formed with a same trapezoidal block (603), two pulleys (607) are provided between the ends of the two guide arms (601) away from the trapezoidal block (603), and an annular groove (14) is provided on the surface of the two pulleys (607), the outside of the two guide arms (601) is provided with a same support arm (604), and a driving arm (602) is slidably connected between the tops of the two guide arms (601), and one end of the driving arm (602) is in a right-angled trapezoid shape and is adapted to be connected between the bottom surfaces of the trapezoidal block (603); The rope passes between the two pulleys (607) in a vertical state, and the connection point of the annular grooves (14) on the two pulleys (607) is vertically projected into a circular shape in a plane. The driving arm (602) cooperates with the bottom of the trapezoidal block (603) to push the trapezoidal block (603) to move away from the support arm (604), so that the guide arm (601) carries the two pulleys (607) to tilt and move away from the crane drum body (11).

2. A crane drum according to claim 1, characterized in that: The reciprocating guide assembly (7) includes a reciprocating screw (704), the reciprocating screw (704) is sleeved with a screw assembly (705) on the outside, the screw assembly (705) is internally assembled with a limit head (707) extending into the groove of the reciprocating screw (704), the bottom of the screw assembly (705) is assembled with a second sliding block (702), and both ends of the second sliding block (702) are internally provided with a guide rod (703) parallel to the reciprocating screw (704); A reducer assembly (3) and a support seat (9) are respectively provided at both ends of the crane drum body (11); a motor (1) parallel to the axis of the crane drum body (11) is provided at the bottom of one end of the reducer assembly (3); one end of the motor (1) shaft is connected to the gear transmission inside the reducer assembly (3) and passes through the inside of the reducer assembly (3); a first pulley (2) is assembled and connected to the portion of the motor (1) shaft passing through the reducer assembly (3); Both ends of the reciprocating screw rod (704) are integrally formed with a support shaft rod (706), one end of the support shaft rod (706) is integrally formed with an extension shaft rod, the outside of the extension shaft rod is pin-connected to a second pulley (8), and the outsides of the first pulley (2) and the second pulley (8) are commonly connected to a transmission belt (4).

3. A crane drum according to claim 2, characterized in that: A stand (701) is provided on the outside of one end of the two support shafts (706), and a seat frame (10) is assembled and connected to the bottom of one of the stands (701); The two guide rods (703) are symmetrically arranged on both sides of the bottom of the reciprocating screw (704), and the two ends are respectively assembled and fixed with the two stands (701), the other stand (701) is assembled to the top of the reducer assembly (3), and the seat frame (10) is assembled to the top of the support seat (9), supporting the rotating reciprocating screw (704) to drive the rope guide assembly (6) connected to the second sliding block (702) to move along the direction of the axis of the crane drum body (11).

4. A crane drum according to claim 1, characterized in that: The outer surface of the support arm (604) is integrally formed with a seat plate (611), and a multi-stage electric push rod (606) is assembled and connected between the end of the drive arm (602) away from the trapezoidal block (603) and the surface of the seat plate (611); The multi-stage electric push rod (606) controls the driving arm (602) to move between the two guide arms (601) toward one side of (7), the guide arm (601) and the support arm (604) are kept in a vertical state, and the angle between the two guide arms (601) and the horizontal plane is forty-five degrees, and the inner surface of the support arm (604) and the side surface of the guide arm (601) close to the crane drum body (11) are at the same distance from the axis of the crane drum body (11).

5. A crane drum according to claim 2, characterized in that: One end of the support arm (604) away from the trapezoidal block (603) is assembled and connected to two first sliding blocks (605), the two first sliding blocks (605) are respectively located on both sides of the second sliding block (702), the two second sliding blocks (702) and the one first sliding block (605) pass through two assembly short rods (708) at the inside, and nuts are connected at both ends of the assembly short rods (708) to fix the second sliding blocks (702) and the first sliding block (605); The reciprocating screw (704) is in a rotating state, and the limit head (707) cooperates with the surface groove, and the second sliding block (702) slides outside the two guide rods (703), so that the screw assembly (705) drives the second sliding block (702) and the first sliding block (605) to move back and forth along the axis of the reciprocating screw (704), and the control support arm (604) drives the two pulleys (607) between the two guide arms (601) at the bottom of the trapezoidal block (603) to move, thereby changing the position of the rope passing between the two pulleys (607) and winding around the surface of the crane drum body (11).

6. A crane drum according to claim 1, characterized in that: A shim block (608) is assembled and connected between the middle parts of the two guide arms (601), a spring (609) is provided between the top of the shim block (608) and the bottom of one end of the support arm (604), and the top and bottom of the spring (609) are both welded and connected with screws (610); One of the screws (610) is threadedly connected to the interior of the support arm (604), and the other screw (610) is threadedly connected to the interior of the shim block (608).

7. A crane drum according to claim 5, characterized in that: The inner angle of the support arm (604) is 135 degrees. The support arm (604) is divided into a horizontal section and an inclined section. A strip groove (15) is provided at the bottom of the driving arm (602). A limiting bar (612) is integrally formed on the outer inclined surface of the support arm (604). The driving arm (602) is slidably connected to the outside of the limiting bar (612) through a bar groove (15), and the bottoms of both ends of the first sliding block (605) are buckled to the top of the guide long rod (703) at the corresponding position through the arc-shaped bar groove (13).

8. A crane drum according to claim 2, characterized in that: The exterior of the second pulley (8) and the first pulley (2) are processed into gear shapes, and the interior of the transmission belt (4) is processed with a rack meshing with the second pulley (8) and the first pulley (2).

9. A crane drum according to claim 2, characterized in that: The outside of the extension shaft and the outside of the portion of the motor (1) rotating shaft passing through the reducer assembly (3) are equipped with gears that mesh with each other.

10. The crane drum according to claim 2, characterized in that: The bottoms of the two supporting shafts (706) are each provided with a mounting block (5), and a proximity switch (12) is assembled and connected inside the mounting block (5); The two proximity switches (12) are arranged facing each other, the second sliding block (702) carries the two first sliding blocks (605) and moves between the two proximity switches (12), and the processor monitors the position of the second sliding block (702) with the help of the two proximity switches (12) to control the multi-stage extension state of the multi-stage electric push rod (606).

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