Pulley assembly for unloading crane

Abstract

The utility model discloses a pulley assembly for an unloading crane, and relates to the technical field of crane hoisting. The pulley assembly for the unloading crane comprises a pulley assembly support and a distance adjusting assembly, the distance adjusting assembly comprises two adjusting frames, a moving block, a motor, a mounting plate, a first gear, a second gear and a threaded rod, and the two adjusting frames are slidably connected into the pulley assembly support; the number of the moving blocks is the same as that of the adjusting frames, the moving blocks are fixedly connected to the surfaces of the corresponding adjusting frames, each moving block is slidably connected with the corresponding pulley assembly support, the number of the motors is two, the two motors are fixedly connected to the surfaces of the pulley assembly supports, and the two mounting plates are fixedly connected to the surfaces of the pulley assembly supports. Stepless adjustment of pulley spacing is realized through a gear threaded rod transmission mechanism driven by a motor, so that the wrap angle of the steel wire rope is always in an optimal state, and the hoisting stability and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crane hoisting, especially relates to a pulley assembly for unloading crane. BACKGROUND

[0002] The unloading crane is an engineering machinery for disassembling, transporting or installing heavy equipment, which is usually composed of a crane, a lifting arm, a hydraulic system, a control system and other core components. Its working principle is to realize the extension, rotation and lifting of the lifting arm through hydraulic drive or motor transmission, and to complete the precise hoisting operation of heavy objects by cooperating with the lifting appliance such as steel wire rope and lifting hook. The unloading crane is widely used in construction sites, ports, factories and other scenes, and has the characteristics of strong load capacity (up to hundreds of tons), large operation radius (adjusted by telescopic arm), flexible operation (supporting 360° rotation), etc. Modern unloading crane is usually equipped with an intelligent control system, which can realize automatic balance adjustment, overload alarm, remote monitoring and other functions, significantly improving construction safety and efficiency.

[0003] The unloading crane is an engineering machinery for disassembling, transporting or installing heavy equipment, which is usually composed of a crane, a lifting arm, a hydraulic system, a control system and other core components. Its working principle is to realize the extension, rotation and lifting of the lifting arm through hydraulic drive or motor transmission, and to complete the precise hoisting operation of heavy objects by cooperating with the lifting appliance such as steel wire rope and lifting hook. The unloading crane is widely used in construction sites, ports, factories and other scenes, and has the characteristics of strong load capacity (up to hundreds of tons), large operation radius (adjusted by telescopic arm), flexible operation (supporting 360° rotation), etc. Modern unloading crane is usually equipped with an intelligent control system, which can realize automatic balance adjustment, overload alarm, remote monitoring and other functions, significantly improving construction safety and efficiency. SUMMARY

[0004] The utility model discloses a pulley assembly for unloading crane, which can solve the problem of progressive wear of the sliding surface between the fixed bolt and the adjusting slot during long-term use, which gradually increases the fitting clearance and affects the positioning accuracy of the pulley set.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: A pulley assembly for crane, including pulley assembly support and interval adjusting assembly, interval adjusting assembly includes adjusting frame, moving block, motor, mounting plate, first gear, second gear and threaded rod, the number of adjusting frame is two and all is connected in the inside of pulley assembly support, the number of moving block is same with adjusting frame and all is fixedly connected on the surface of corresponding adjusting frame, every moving block all is connected with pulley assembly support slidingly, the number of motor is two and all is fixedly connected on the surface of pulley assembly support, the number of mounting plate is two and all is fixedly connected on the surface of pulley assembly support, the number of first gear is two and all is rotatably connected on the surface of pulley assembly support, the number of second gear is two and all is rotatably connected on the surface of corresponding mounting plate, the number of threaded rod is two and all is fixedly connected on the surface of second gear, two moving blocks are respectively threaded sleeve and connected on the outer surface of corresponding threaded rod.

[0006] Preferably, the surface of the pulley assembly support is provided with a plurality of limiting grooves, the surface of the adjusting frame is fixedly connected with a limiting strip, each limiting strip is slidably connected with a corresponding limiting groove, and the surface of the pulley assembly support is provided with a rectangular groove for sliding of the moving block.

[0007] Preferably, the inside of the pulley assembly support is provided with a containing groove, and each adjusting frame is slidably connected in the inside of the containing groove.

[0008] Preferably, the inside of the adjusting frame is boltedly connected with a mounting frame, and the inside of the mounting frame is fixedly connected with a pulley frame.

[0009] Preferably, the surface of the pulley frame is rotatably connected with a pulley, and the surface of the pulley frame is fixedly connected with a connecting rod.

[0010] Preferably, the number of the mounting frames is two and each is boltedly connected in the inside of a corresponding adjusting frame.

[0011] Preferably, the number of the pulley frames is two and each is located in the inside of a corresponding mounting frame, and the number of the pulleys and the connecting rods is same with the number of the pulley frames.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The pulley assembly for the crane, the stepless adjustment of the pulley spacing is realized through the gear screw rod transmission mechanism driven by the motor, the wire rope angle is always in the best state, the hoisting stability and safety are improved, the sliding cooperation structure of the limiting groove and the limiting strip is adopted, the movement track of the pulley in the adjustment process is ensured to be accurate and without deviation, the asymmetric adjustment is allowed by the independent control design of the double motors, the complex working condition requirements are adapted, the modular installation frame and the bolt connection structure are convenient for maintenance and replacement, the overall structure is compact and high in rigidity, the double constraints of the connecting rod and the moving block effectively eliminate the transmission gap, the adjustment accuracy is ensured while the heavy load impact is borne, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further illustrated below in combination with the drawings and embodiments:

[0015] Figure 1 It is a schematic view of the body of the utility model;

[0016] Figure 2 It is a schematic view of the utility model of the Figure 1 It is a schematic view of the utility model of the

[0017] Figure 3 It is a schematic view of the adjustment frame of the utility model;

[0018] Figure 4 It is a schematic view of the screw rod of the utility model.

[0019] The drawings are as follows: 1, pulley assembly support; 2, containing groove; 3, adjustment frame; 4, limiting groove; 5, limiting strip; 6, moving block; 7, motor; 8, rectangular groove; 9, installation frame; 10, pulley frame; 11, pulley; 12, connecting rod; 13, mounting plate; 14, first gear; 15, second gear; 16, screw rod. DETAILED DESCRIPTION

[0020] This part will describe the specific embodiments of the utility model in detail, the preferred embodiments of the utility model are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0021] In the description of the utility model, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like based on the orientation or position relationship shown in the drawings is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as the limitation of the utility model.

[0022] In the description of the utility model, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first, second is only used for distinguishing technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0023] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be broadly understood, and the specific meaning of the above words in the utility model can be reasonably determined by the person skilled in the art in combination with the specific content of the technical scheme.

[0024] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a pulley assembly for crane, including pulley assembly support 1 and interval adjusting assembly, interval adjusting assembly includes adjusting frame 3, moving block 6, motor 7, mounting plate 13, first gear 14, second gear 15 and threaded rod 16, the number of adjusting frame 3 is two and is slidably connected in the inside of pulley assembly support 1, the number of moving block 6 is same with adjusting frame 3 and is fixedly connected on the surface of corresponding adjusting frame 3, each moving block 6 is slidably connected with pulley assembly support 1, the number of motor 7 is two and is fixedly connected on the surface of pulley assembly support 1, the number of mounting plate 13 is two and is fixedly connected on the surface of pulley assembly support 1, the number of first gear 14 is two and is rotatably connected on the surface of pulley assembly support 1, the number of second gear 15 is two and is rotatably connected on the surface of corresponding mounting plate 13, the number of threaded rod 16 is two and is fixedly connected on the surface of second gear 15, two moving blocks 6 are respectively threadedly sleeved on the outer surface of corresponding threaded rod 16.

[0025] Further, the surface of pulley assembly support 1 is provided with a plurality of limiting grooves 4, the surface of adjusting frame 3 is fixedly connected with limiting strip 5, each limiting strip 5 is slidably connected with corresponding limiting groove 4, the surface of pulley assembly support 1 is provided with rectangular groove 8 for the sliding of moving block 6, the inside of pulley assembly support 1 is provided with accommodating groove 2, each adjusting frame 3 is slidably connected in the inside of accommodating groove 2, the inside of adjusting frame 3 is bolted with mounting frame 9, the inside of mounting frame 9 is fixedly connected with pulley carrier 10, the surface of pulley carrier 10 is rotatably connected with pulley 11, the surface of pulley carrier 10 is fixedly connected with connecting rod 12, the number of mounting frame 9 is two and is bolted in the inside of corresponding adjusting frame 3 respectively, the number of pulley carrier 10 is two and is located in the inside of corresponding mounting frame 9, the number of pulley 11 and connecting rod 12 is same with pulley carrier 10.

[0026] Further, the motor 7 drives the first gear 14 to rotate, drives the second gear 15 to rotate through gear engagement, and synchronously rotates the threaded rod 16 fixedly connected to the second gear 15, because the moving block 6 is threadedly connected with the threaded rod 16 and is constrained to slide in the rectangular groove 8, the rotation of the threaded rod 16 is converted into the linear motion of the moving block 6, the moving block 6 drives the adjusting frame 3 to slide in the accommodating groove 2, the cooperation of the limiting strip 5 and the limiting groove 4 ensures the accurate motion track, the displacement of the adjusting frame 3 is transmitted to the pulley bracket 10 through the mounting frame 9, so that the two pulleys 11 are moved respectively, the stepless adjustment of the pulley spacing is realized, the connecting rod 12 keeps the structural rigidity of the pulley assembly, the whole transmission system realizes the bidirectional adjustment through the forward and reverse rotation of the motor, the center distance of the pulley assembly can be dynamically adjusted according to the load demand in the hoisting operation, and it is ensured that the steel wire rope is always in the best wrapping angle state.

[0027] Further, the motor-driven gear threaded rod transmission mechanism realizes the stepless adjustment of the pulley spacing, so that the steel wire rope wrapping angle is always in the best state, the hoisting stability and safety are improved, the sliding cooperation structure of the limiting groove and the limiting strip is adopted, the motion track of the pulley in the adjustment process is ensured to be accurate and without deviation, the design of the double-motor independent control allows the asymmetric adjustment, the complex working condition demand is adapted, the modular mounting frame and the bolt connection structure are convenient for maintenance and replacement, the overall structure is compact and high in rigidity, the double constraints of the connecting rod and the moving block effectively eliminate the transmission gap, the adjustment accuracy is ensured while the heavy load impact can be borne, and the service life of the equipment is prolonged.

[0028] Structure description: Pulley assembly support 1: as the basic support structure of the whole pulley assembly, providing installation platform and motion guide function for other parts, ensuring the stability and reliability of the overall structure;

[0029] Accommodating groove 2: providing accurate sliding space for the adjusting frame, limiting its motion track, ensuring the stability and accuracy in the pulley spacing adjustment process;

[0030] Adjusting frame 3: as the moving carrier of the pulley installation, driving the pulley position change through sliding, realizing the dynamic adjustment of the pulley spacing;

[0031] Limiting groove 4: cooperating with the limiting strip to form a guide mechanism, constraining the motion direction of the adjusting frame, preventing it from deviating or being stuck during the adjustment process;

[0032] Limiting strip 5: embedded in the limiting groove and sliding, enhancing the linearity and stability of the adjusting frame motion, ensuring the accuracy of the pulley position adjustment;

[0033] Moving block 6: converting the rotary motion of the threaded rod into linear motion, and transmitting the driving force to the adjusting frame, realizing power transmission and position conversion;

[0034] Motor 7: provides power output, drives the entire adjustment mechanism to operate through the gear transmission system, realizes the automatic control of the distance between pulleys;

[0035] Rectangular groove 8: provides a specific sliding path for the moving block, limits its freedom of movement, and ensures smooth movement of the moving block in the predetermined direction;

[0036] Mounting frame 9: as the mounting base of the pulley frame, it is quickly disassembled and assembled through bolt connection, which is convenient for maintenance and replacement of the pulley assembly;

[0037] Pulley frame 10: fixes the pulley and provides rotation support for it, bears the load of the steel wire rope, and ensures the stability and durability of the pulley operation;

[0038] Pulley 11: directly contacts with the steel wire rope and guides its movement direction, reduces friction resistance, and improves the efficiency and safety of hoisting operation;

[0039] Connecting rod 12: enhances the overall rigidity of the pulley assembly, prevents structural deformation during adjustment, and ensures the accuracy and reliability of the pulley spacing adjustment;

[0040] Mounting plate 13: provides mounting support for the gear transmission system, fixes the second gear and threaded rod, and ensures stable operation of the transmission mechanism;

[0041] First gear 14: transmits motor power to the second gear, realizes power transmission and speed conversion, and ensures reasonable control of adjustment speed;

[0042] Second gear 15: engages with the first gear to drive the threaded rod to rotate, converts motor power into threaded motion, and realizes accurate position adjustment;

[0043] Threaded rod 16: converts rotary motion into linear motion through thread cooperation with the moving block, and provides accurate displacement control for pulley spacing adjustment.

[0044] The above embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A sheave assembly for a crane, characterized in that Include: Pulley assembly support (1); The distance adjusting assembly includes adjusting frame (3), moving block (6), motor (7), mounting plate (13), first gear (14), second gear (15) and threaded rod (16), the number of adjusting frame (3) is two and is slidingly connected in the inside of pulley assembly support (1), the number of moving block (6) is the same as that of adjusting frame (3) and is fixedly connected on the surface of corresponding adjusting frame (3), each moving block (6) is slidingly connected with pulley assembly support (1), the number of motor (7) is two and is fixedly connected on the surface of pulley assembly support (1), the number of mounting plate (13) is two and is fixedly connected on the surface of pulley assembly support (1), the number of first gear (14) is two and is rotatably connected on the surface of pulley assembly support (1), the number of second gear (15) is two and is rotatably connected on the surface of corresponding mounting plate (13), the number of threaded rod (16) is two and is fixedly connected on the surface of second gear (15), two moving blocks (6) are respectively threadedly sleeved on the outer surface of corresponding threaded rod (16).

2. A sheave assembly for a crane according to claim 1, wherein: The surface of the pulley assembly support (1) is provided with a plurality of limiting grooves (4), the surface of the adjusting frame (3) is fixedly connected with a limiting strip (5), each limiting strip (5) is slidingly connected with the corresponding limiting groove (4), and the surface of the pulley assembly support (1) is provided with a rectangular groove (8) for sliding of the moving block (6).

3. A sheave assembly for a crane according to claim 1, wherein: The inside of the pulley assembly support (1) is provided with a containing groove (2), and each adjusting frame (3) is slidingly connected in the inside of the containing groove (2).

4. A sheave assembly for a crane according to claim 1, wherein: The inside of the adjusting frame (3) is bolted with a mounting frame (9), and the inside of the mounting frame (9) is fixedly connected with a pulley frame (10).

5. A sheave assembly for a crane according to claim 4, wherein: The surface of the pulley frame (10) is rotatably connected with a pulley (11), and the surface of the pulley frame (10) is fixedly connected with a connecting rod (12).

6. A sheave assembly for a crane according to claim 4, wherein: The number of the mounting frame (9) is two and is bolted in the inside of the corresponding adjusting frame (3).

7. A sheave assembly for a crane according to claim 4 wherein: The number of the pulley frame (10) is two and is located in the inside of the corresponding mounting frame (9), and the number of the pulley (11) and the connecting rod (12) is the same as that of the pulley frame (10).

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