Crane steel wire rope balance adjusting device

Abstract

The invention relates to a crane steel wire rope balance adjusting device in the technical field of crane lifting. The crane steel wire rope balance adjusting device comprises a base plate, an adjusting motor, two adjusting movable pulleys and two worm and gear transmission pairs. Driven gears are coaxially fixed to the two worm wheels, an output shaft of the adjusting motor is in transmission connection with a gear shaft through a flexible shaft, a driving gear is coaxially fixed to the gear shaft, and a shifting fork mechanism is arranged on one side of the gear shaft; each worm is rotationally sleeved with an inner connecting rod, the outer ends of the two inner connecting rods are fixedly connected with the wheel frames of the two adjusting movable pulleys respectively, a sliding rail is arranged below each adjusting movable pulley, a sliding block is installed on each sliding rail in a sliding mode, and the sliding blocks are connected with the wheel frames of the corresponding adjusting movable pulleys; a starting end fixed pulley and a terminal fixed pulley are correspondingly arranged on the two sides of each adjusting movable pulley; the balance adjusting device can directly, correspondingly and stably adjust the unbalance offset of the steel wire rope in a large-range, high-efficiency and high-safety mode.

Description

Technical Field

[0001] The invention relates to the technical field of crane hoisting, and in particular to a crane wire rope balance adjustment device. Background Art

[0002] With the continuous development and progress of society, the demand for large-tonnage and high-lift cranes is increasing. Affected by different usage conditions and environments, and the different ductility of wire ropes from different batches, the change in the lifting length of the wire rope will cause the sling to deflect when lifting the cargo, causing the cargo to become unstable, which is very likely to cause safety accidents. The instability of cargo during lifting causes great safety hazards and a high risk factor. Therefore, solving the instability of cargo caused by the ductility of the wire rope has become an operational problem in the lifting process. There are two main existing wire rope balance adjustment methods. One is to set a tensioning mechanism through a spring. However, due to the uncertain elasticity of the spring, it can only play a relieving role, especially when lifting very heavy objects, the effect is even smaller; the other is to use a balance arm structure. For example, the Chinese utility model patent with announcement number CN201002922Y discloses a balance arm device for preventing the wire rope of the crane hoisting mechanism from rotating. The balance arm connected by the middle rotation is used to adaptively and dynamically adjust the wire ropes connected to the two ends of the balance arm. However, this adjustment is also lagging, and it is in a shaking and unstable state, and the fundamental problem is not solved. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses a crane wire rope balance adjustment device, which can directly and stably adjust the unbalanced offset of the wire rope in a large range, with high efficiency and high safety.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A crane wire rope balance adjustment device comprises a base plate, an adjustment motor arranged on the base plate, two adjustment movable pulleys and two worm gear transmission pairs; the worms of the two worm gear transmission pairs are coaxially and symmetrically arranged on both sides of the output shaft of the adjustment motor, the worm wheels of the two worm gear transmission pairs are coaxially fixed with driven gears, the output shaft of the adjustment motor is connected to a gear shaft through a flexible shaft transmission, the gear shaft is coaxially fixed with a driving gear, and one side of the gear shaft is provided with a shifting fork mechanism for shifting the gear shaft back and forth so that the driving gear can mesh with any driven gear; Each worm is configured as a hollow rod and is rotatably sleeved with an inner connecting rod, the outer ends of the two inner connecting rods are respectively fixedly connected to the wheel frames of the two adjusting movable pulleys, and a slide rail fixedly installed on the base plate and coaxial with the worm is provided below each adjusting movable pulley, a slider is slidably installed on the slide rail, and the slider is fixedly connected to the wheel frame of the corresponding adjusting movable pulley; both sides of each adjusting movable pulley are correspondingly provided with a starting fixed pulley and a terminal fixed pulley installed on the base plate, so that the rope end of the external wire rope can pass through the starting fixed pulley, the corresponding adjusting movable pulley and the terminal fixed pulley in sequence, and then be connected to the upper surface of the base plate.

[0005] Furthermore, the balance adjustment device also includes a control unit and an imbalance detection unit arranged corresponding to the steel wire rope, and the control unit is respectively connected with the imbalance detection unit, the adjustment motor and the fork mechanism in accordance with the signals.

[0006] Furthermore, the imbalance detection unit is configured as a tension detection component for detecting the tightness of the wire rope, or a distance detection component for detecting the deflection of the wire rope hoisting object.

[0007] Furthermore, the regulating motor cover is provided with a chassis, and the worm gear and the driven gear are both rotatably mounted on the outer wall of the chassis; the corresponding box wall of the chassis is provided with a waist-shaped hole through which the corresponding gear shaft passes and is moved to limit the position.

[0008] Furthermore, an intermediate gear for meshing and transmitting the driven gear and the driving gear is rotatably mounted on the outer wall of the chassis.

[0009] Furthermore, the fork mechanism includes a fork rod whose middle part is rotatably mounted on the chassis through a hinge shaft, the head end of the fork rod is provided with a U-shaped clip corresponding to the gear shaft, and the tail end of the fork rod is connected to a driving component that controls its swing.

[0010] Furthermore, a plurality of redirecting fixed pulleys are arranged between one of the adjusting movable pulleys and the corresponding starting fixed pulley, so that the two starting fixed pulleys can be symmetrically arranged at both ends of the base plate.

[0011] Furthermore, the axle of the adjusting movable pulley is perpendicular to the base plate, and the axles of the starting fixed pulley and the terminal fixed pulley are parallel to the base plate.

[0012] Furthermore, two slide rails are arranged side by side at intervals under each adjustable movable pulley.

[0013] Furthermore, the regulating motor is configured as a servo motor.

[0014] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The crane wire rope balance adjustment device disclosed in the present invention can drive the driving gear, the driven gear, the turbine and the worm to rotate in sequence by adjusting the motor, thereby driving the inner connecting rod to move axially, so as to adjust the movable pulley to move and adjust the positioning along the slide rail, and directly change the sagging length of the left and right wire ropes by adjusting the offset of the movable pulley, so as to ensure the stability of the hoisting cargo and reduce the safety hazards when hoisting cargo; in addition to satisfying the above basic stable adjustment function, the present invention also has the following advantages: First, by integrating the layout on the base plate and adjusting the plane on the plate surface, it not only saves a lot of space, but also prevents interference with other lifting components, making it easier to disassemble and use modularly; Second, the horizontal adjustment of the upper edge of the base plate increases the adjustment range. Not only can the single wire rope be adjusted, but the left and right wire ropes can also be adjusted accordingly. While further increasing the adjustment range, it can also avoid excessive adjustment of a single wire rope, which affects the performance of the bearing structure. Third, a single regulating motor is used for one-to-two regulation control, which saves costs and facilitates modular integrated setting. It can also produce a limiting effect when the inner ends of the two worms collide with each other. When in a conflicting state, one worm can be adjusted and the two worms can move in the same direction, and the two wire ropes can be prevented from loosening while being tightened at the same time. Fourth, the adjustment process does not require human intervention. The adjustment action can be started at the moment the lifting is offset. Multiple adjustments can be made according to the different weights of the goods. The adjustment process is fast, efficient and safe. In working conditions where the spreader needs to be tilted, it can also actively achieve unilateral deflection of the spreader to meet the needs of different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the implementation structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A after removing the chassis; Figure 3 is a schematic structural diagram of the flexible shaft; Figure 4 is a schematic structural diagram of the gear shaft; Figure 5 is a structural schematic diagram of the fork mechanism; Figure 6It is a three-dimensional schematic diagram of the matching transmission structure from another angle of the implementation structure of the present invention.

[0016] In the figure: 1. base plate; 2. adjusting movable pulley; 3. terminal fixed pulley; 4. starting fixed pulley; 5. slider; 6. slide rail; 7. chassis; 8. worm gear transmission pair; 801. worm; 802. worm wheel; 9. shift fork mechanism; 901. shift fork rod; 902. hinge shaft; 903. drive assembly; 10. gear shaft; 11. flexible shaft; 12. adjusting motor; 13. driven gear; 14. intermediate gear; 15. inner connecting rod; 16. driving gear; 17. redirecting fixed pulley. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction: Combined with Figure 1-6 The crane wire rope balance adjustment device comprises a base plate 1, and an adjustment motor 12, two adjustment movable pulleys 2 and two worm gear transmission pairs 8 arranged on the upper surface of the base plate 1. The adjustment motor 12 is generally set as a servo motor for easy rotation adjustment control. The wheel axle of the adjustment movable pulley 2 is perpendicular to the base plate 1, and of course it can also be at an acute angle. However, it is more convenient for installation conditions and winding wire ropes when the wheel surface of the adjustment movable pulley 2 is parallel to the base plate 1; The worms 801 of the two worm gear transmission pairs 8 are coaxially and symmetrically arranged on both sides of the output shaft of the adjusting motor 12, and a certain adjustment spacing is left between the two worm gears 801. The worm wheels 802 of the two worm gear transmission pairs 8 are coaxially fixed with driven gears 13. The output shaft of the adjusting motor 12 is connected to the gear shaft 10 through a flexible shaft 11. The flexible shaft 11 can also be bent to a certain extent while transmitting torque. According to needs, the outer cover of the adjusting motor 12 is provided with a chassis 7 to play a certain role in protecting dust. The worm wheel 802 and the driven gear 13 are both rotatably installed on the outer wall of the chassis 7. The corresponding box wall of the chassis 7 is provided with a waist-shaped hole corresponding to the gear shaft 10 that rotates through and moves the limit. The box wall of the chassis 7 can also be installed and supported; the gear shaft 10 is coaxially fixed with a driving gear 16, and one side of the gear shaft 10 is provided with a gear for moving the gear shaft 1 back and forth. 0, so that the driving gear 16 can mesh with any driven gear 13 of the fork mechanism 9; according to the needs, the fork mechanism 9 includes a fork rod 901 whose middle part is rotatably mounted on the chassis 7 through a hinge shaft 902, the head end of the fork rod 901 is provided with a U-shaped card corresponding to the card-engaged gear shaft 10, and the tail end of the fork rod 901 is connected with a driving component 903 for controlling its swing, and the driving component 903 can be set as an electric telescopic cylinder, and the two ends of the electric telescopic cylinder are respectively hinged with the tail end of the fork rod 901 and the base plate 1, and the tail end of the fork rod 901 is pushed to swing, thereby controlling the gear shaft 10 to move back and forth; in addition, the outer wall of the chassis 7 is rotatably mounted with an intermediate gear 14 for meshing transmission connection with the driven gear 13 and the driving gear 16, and the intermediate gear 14 can be set to multiple, mainly to allow the two worms 801 to have a larger distance adjustment space before they collide; Each worm 801 is configured as a hollow rod and is rotatably sleeved with an inner connecting rod 15. A plurality of bearings can be installed and fixed between the outer wall of the inner connecting rod and the inner wall of the worm 801 to ensure that when the worm wheel 802 drives the worm 801 to rotate, the worm 801 can only transmit axial thrust to the inner connecting rod 15. The outer ends of the two inner connecting rods 15 are respectively fixedly connected to the wheel frames of the two adjustable movable pulleys 2. A slide rail 6 fixedly installed on the base plate 1 and coaxial with the worm 801 is provided below each adjustable movable pulley 2. Two slide rails 6 are arranged side by side at intervals below each adjustable movable pulley 2. A slider 5 is slidably mounted on the slide rail 6. The slider 5 is fixedly connected to the wheel frame of the corresponding adjustable movable pulley 2 to ensure that Driven by the inner connecting rod 15, the adjustable movable pulley 2 can move along the slide rail 6; each of the two sides of the adjustable movable pulley 2 is provided with a starting fixed pulley 4 and a terminal fixed pulley 3 installed on the base plate 1, and the wheel axles of the starting fixed pulley 4 and the terminal fixed pulley 3 are parallel to the base plate 1, so that the end of the external steel wire rope can pass through the upper part of the starting fixed pulley 4, the corresponding adjustable movable pulley 2 and the terminal fixed pulley 3 in turn, and then be connected to the upper surface of the base plate 1; according to needs, a plurality of redirecting fixed pulleys 17 are provided between one of the adjustable movable pulleys 2 and the corresponding starting fixed pulley 4, so that the two starting fixed pulleys 4 can be symmetrically arranged at both ends of the base plate 1, and the symmetrical arrangement can make it easier to connect the steel wire rope wrapped around the outside.

[0018] As needed, the balance adjustment device also includes a control unit and an imbalance detection unit arranged corresponding to the wire rope, and the control unit is respectively connected to the imbalance detection unit, the adjustment motor 12 and the fork mechanism 9 for corresponding signals; in addition, the imbalance detection unit can be set as a tension detection component for detecting the tightness of the wire rope, or a distance detection component for detecting the deflection of the wire rope hoisting object. The tension detection component is generally set as a tension sensor connected to the wire rope, or a dual-probe infrared macro measuring instrument installed on the inner wall of the wire rope clamp kit corresponding to the wire rope, and the distance detection component is generally installed on the trolley frame to measure the distance of the corresponding sling to see whether the sling is tilted.

[0019] The crane wire rope balance adjustment device described in the present invention can immediately feedback control the shift fork mechanism 9 when it is detected that the wire rope on one side is too long or too short, causing the hoisted object to tilt, so as to shift the gear shaft 10 to the worm gear transmission pair 8 on the side where the corresponding wire rope needs to be adjusted, and make the driving gear 16 and the corresponding worm wheel 802 mesh correspondingly, and then start the adjustment motor 12, drive the worm 801 and the inner connecting rod 15 to move axially through the transmission, and then push the adjustment movable pulley 2 to move along the slide rail 6, so as to tighten or loosen the wire rope on this side, and realize the hoisting balance of the left and right wire ropes.

[0020] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A crane wire rope balance adjustment device, characterized in that: The invention comprises a base plate (1), an adjusting motor (12), two adjusting movable pulleys (2) and two worm gear transmission pairs (8) arranged on the upper surface of the base plate (1); the worms (801) of the two worm gear transmission pairs (8) are coaxially and symmetrically arranged on both sides of the output shaft of the adjusting motor (12); the worm wheels (802) of the two worm gear transmission pairs (8) are coaxially fixed with a driven gear (13); the output shaft of the adjusting motor (12) is connected to a gear shaft (10) through a flexible shaft (11); the gear shaft (10) is coaxially fixed with a driving gear (16); one side of the gear shaft (10) is provided with a shifting fork mechanism (9) for shifting the gear shaft (10) back and forth so that the driving gear (16) can mesh with any driven gear (13); each Each worm (801) is configured as a hollow rod and is rotatably sleeved with an inner connecting rod (15). The outer ends of the two inner connecting rods (15) are respectively fixedly connected to the wheel frames of the two adjustable movable pulleys (2). A slide rail (6) fixedly mounted on the base plate (1) and coaxial with the worm (801) is provided below each adjustable movable pulley (2). A slider (5) is slidably mounted on the slide rail (6). The slider (5) is fixedly connected to the wheel frame of the corresponding adjustable movable pulley (2). Both sides of each adjustable movable pulley (2) are correspondingly provided with a starting fixed pulley (4) and a terminal fixed pulley (3) mounted on the base plate (1), so that the rope end of the external steel wire rope can be connected to the upper plate surface of the base plate (1) after passing through the starting fixed pulley (4), the corresponding adjustable movable pulley (2) and the terminal fixed pulley (3) in sequence.

2. The crane wire rope balance adjustment device according to claim 1 is characterized in that: The balance adjustment device further comprises a control unit and an imbalance detection unit arranged corresponding to the steel wire rope, wherein the control unit is respectively connected to the imbalance detection unit, the adjustment motor (12) and the shifting fork mechanism (9) in accordance with signals.

3. The crane wire rope balance adjustment device according to claim 2 is characterized in that: The imbalance detection unit is configured as a tension detection component for detecting the tightness of the wire rope, or a distance detection component for detecting the deflection of the wire rope hoisting object.

4. The crane wire rope balance adjustment device according to claim 1 is characterized in that: The outer cover of the regulating motor (12) is provided with a case (7); the worm gear (802) and the driven gear (13) are both rotatably mounted on the outer wall of the case (7); and the corresponding case wall of the case (7) is provided with a waist-shaped hole through which the corresponding gear shaft (10) passes and is moved to limit the position.

5. The crane wire rope balance adjustment device according to claim 4 is characterized in that: An intermediate gear (14) for meshing and transmitting a driven gear (13) and a driving gear (16) is rotatably mounted on the outer wall of the chassis (7).

6. The crane wire rope balance adjustment device according to claim 4 is characterized in that: The shift fork mechanism (9) comprises a shift fork rod (901) whose middle portion is rotatably mounted on the chassis (7) via a hinge shaft (902); a U-shaped clip corresponding to the snap-fit ​​gear shaft (10) is provided at the head end of the shift fork rod (901); and a driving assembly (903) for controlling the swing of the shift fork rod (901) is connected to the tail end of the shift fork rod (901).

7. The crane wire rope balance adjustment device according to claim 1 is characterized in that: A plurality of redirecting fixed pulleys (17) are arranged between the adjusting movable pulley (2) and the corresponding starting fixed pulley (4), so that the two starting fixed pulleys (4) can be symmetrically arranged at the two ends of the base plate (1).

8. The crane wire rope balance adjustment device according to claim 1 is characterized in that: The wheel axle of the adjusting movable pulley (2) is perpendicular to the base plate (1), and the wheel axles of the starting fixed pulley (4) and the terminal fixed pulley (3) are parallel to the base plate (1).

9. The crane wire rope balance adjustment device according to claim 1 is characterized in that: Two slide rails (6) are arranged side by side at intervals below each adjusting movable pulley (2).

10. The crane wire rope balance adjustment device according to claim 1, characterized in that: The regulating motor (12) is configured as a servo motor.

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