Movable arm variable-amplitude vertical pulley block
By optimizing the combination structure of movable and fixed pulleys, and combining them with support shafts and reinforcing plates, the problems of visibility obstruction and cumbersome disassembly and assembly in small-volume, high-load mechanical equipment have been solved, achieving efficient and stable operation and low maintenance costs.
Patent Information
- Application Number
- CN202520044979.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In the pursuit of small size and large load capacity, the existing luffing boom lifting system of mechanical equipment has problems such as increased rope density and length affecting the operator's vision, and the pulley mechanism is cumbersome to disassemble and assemble and increases weight.
By using a combination of movable and fixed pulleys connected in series via a support shaft, and incorporating reinforcing plates and guide wheels, the pulley block structure is optimized, reducing weight and wear, increasing load-bearing capacity, and simplifying the assembly and disassembly process.
The pulley block has been compactly designed, reducing equipment maintenance costs and safety hazards, improving equipment efficiency and wire rope life, and enhancing the operator's field of vision and equipment stability.
Smart Images
Figure CN223852182U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of mechanical equipment with amplitude arm lifting, specifically relates to a movable arm amplitude vertical pulley block. BACKGROUND
[0002] According to the demand of quality safety system, the mechanical equipment with amplitude arm lifting, wherein the truss type amplitude arm is changing with the times, and the market demand develops towards smaller equipment volume, larger lifting carrying capacity and safer quality, but in order to obtain smaller equipment volume, the overall quality of the equipment is increased, if the lifting carrying capacity is increased, the rope density and the length of the rope of the amplitude arm lifting pulley mechanism of the equipment are increased, the operator's sight is affected, and the disassembly and assembly of the pulley mechanism are relatively cumbersome after failure. In order to solve this problem, the existing manufacturers mostly adopt the method of placing the pulley block horizontally in parallel, so that the force of the pulley block is uniformly distributed and dispersed, and then the lifting weight is improved, but the volume of the pulley block is not much different from the initial form of the pulley block. Some manufacturers cancel the movable pulley and the triangular supporting arm, and adopt a variable-angle movable pulley mechanism supporting arm to replace the triangular supporting arm and the movable pulley block, compared with the triangular supporting arm, the variable-angle fixed pulley mechanism supporting arm can increase the lifting carrying capacity, but the fixed pulley mechanism supporting arm itself bears more load, so the thickness of the structure plate needs to be increased, and the structure plate needs to be increased, so that the self weight is also increased. CONTENT OF THE UTILITY MODEL
[0003] The utility model aims at providing a movable arm amplitude vertical pulley block to improve the small volume and lifting carrying capacity of the equipment.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:
[0005] A movable arm amplitude vertical pulley block, comprising a movable pulley, a fixed pulley, a supporting shaft, a pulley, a rope blocking plate, a reinforcing plate, an anti-rolling plate, a rope head plate, a supporting shaft sleeve, a guide wheel, a connecting plate, a connecting pin, a steel wire rope, an extension plate, a straight moving plate and a tight end cover.
[0006] The lengthened plate and the straight moving plate in the movable pulley select one of them to make rotary motion through the connecting pin and the amplitude arm according to the working condition, one end of the fixed pulley is connected with the connecting plate to make rotary motion through the connecting pin, the other end of the connecting plate is connected with the connecting shaft of the triangular supporting arm to make rotary motion, two bearings are arranged in the inner hole of the pulley, a snap spring retainer ring is arranged between the two bearings, and the pulleys are connected together through the supporting shaft to make rotary motion at a fixed position on the movable pulley and the fixed pulley respectively, the rope blocking plate is arranged outside the circumference of the pulley, the head end of the supporting shaft is supported by the supporting shaft sleeve and fixed by the fixed end cover, the tail end of the supporting shaft is provided with a clamping groove and is embedded with the anti-rolling plate, and the anti-rolling plate is fixed on the movable pulley and the fixed pulley respectively, the reinforcing plate is arranged at the intermediate position of the pulley in the axial direction, the rope head plate is arranged on the fixed pulley, the guide wheel is arranged on the connecting shaft of the triangular supporting arm to make rotary motion, and the steel wire rope is wound in the groove of the pulley on the movable pulley and the fixed pulley.
[0007] Wherein, when the lengthened plate is connected with the overlength amplitude arm, a steel wire cable is arranged between the lengthened plate and the overlength amplitude arm; when the length of the steel wire rope is sufficient, the straight moving plate is directly connected with the amplitude arm to make rotary motion.
[0008] Wherein, the connecting position of the amplitude arm is at the head end of the amplitude arm.
[0009] Wherein, the connecting plate is arranged on the inner side of the two end supporting plates of the triangular supporting arm.
[0010] Wherein, a spacer sleeve is arranged between the pulleys, an oil channel is arranged in the supporting shaft, and oil injection holes are arranged at the two ends.
[0011] Wherein, the number of the pulleys arranged on the movable pulley is X, and X is an even number.
[0012] Wherein, the number of the pulleys arranged on the fixed pulley is Y, and Y is X-1.
[0013] Wherein, the rope blocking plate is arranged along the outer circle of the pulley.
[0014] Wherein, the head end of the supporting shaft is supported by the supporting shaft sleeve and fixed by the fixed end cover, the supporting shaft sleeve is higher than the extension height of the supporting shaft, and the fixed end cover is supported on the supporting shaft sleeve and is axially fastened to the supporting shaft through bolts.
[0015] Wherein, the fixing port of the anti-rolling plate is a long hole, the anti-rolling plate is tightly attached to the clamping groove of the supporting shaft in the radial direction, and the anti-rolling plate is fastened through bolts.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] The vertical pulley is more compact in structure, and the horizontal distance is short, which is beneficial to the overall pulley stress, all the pulleys are installed on a through shaft, the precision is more accurate, and the installation is more convenient. The vertical pulley eliminates the gravity influence of the pulley set and the flexible steel wire rope, so that the pulley wear is uniform, and the service life of the pulley and the steel wire rope is improved. The vertical pulley structure has high design requirements for the pulley set structure, and the pulley shaft is provided with a reinforcing plate in the middle, so that the pulley set transmission is more smooth and reasonable. After the improvement is put into use, it is proved that the wear of the pulley is greatly reduced, so that the maintenance cost and the maintenance frequency of the equipment are reduced, and the use efficiency and the reliability of the equipment are improved. The service life of the steel wire rope is also greatly improved, the cost of replacing the steel wire rope is saved for the customer, and the safety hidden danger caused by the damage of the steel wire rope is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 Fig. 1 is a schematic diagram of a vertical pulley set structure of a dynamic arm luffing provided by an embodiment of the present utility model;
[0019] Figure 2 Fig. 2 is a first schematic diagram of a vertical pulley set installation structure of a dynamic arm luffing provided by an embodiment of the present utility model;
[0020] Figure 3 Fig. 3 is a second schematic diagram of a vertical pulley set installation structure of a dynamic arm luffing provided by an embodiment of the present utility model. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the present utility model will be clearly and completely described in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present utility model.
[0022] In the description of the present utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model.
[0023] In the description of the patent, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set, which can refer to direct connection or indirect connection. For those skilled in the art, the specific meaning of the above terms in the patent can be understood according to the specific circumstances.
[0024] Please refer to Figures 1-3 The embodiment structure provided by the utility model is shown.
[0025] Specific implementation method one: combined with Figure 1 And Figure 2 The embodiment is described, and the dynamic arm amplitude vertical pulley set of the embodiment comprises a movable pulley 1, a fixed pulley 2, a support shaft 3, a pulley 4, a rope blocking plate 5, a reinforcing plate 6, an anti-rolling plate 7, a rope head plate 8, a support shaft sleeve 9, a guide wheel 10, a connecting plate 11, a connecting pin 12, a steel wire rope 13, an extension plate 15, a straight moving plate 14, and a tight end cover 16.
[0026] The extension plate 15 and the straight moving plate 14 in the movable pulley 1 are connected by the connecting pin 12 and the amplitude arm connection port to make rotary motion according to the situation, one end of the fixed pulley 2 is connected to the connecting plate 11 by the connecting pin 12 to make rotary motion, the other end of the connecting plate 11 is connected to the triangular support connecting shaft to make rotary motion, the inner holes of the pulleys 4 are both provided with two bearings and are blocked by the inner snap spring retainer ring, and are connected in series by the support shaft 3 to make rotary motion at a fixed position on the movable pulley 1 and the fixed pulley 2 respectively, the rope blocking plate 5 is arranged on the outer side of the circumference of the pulley 4, the head end of the support shaft 3 is supported by the support shaft sleeve 9 and fixed by the tight end cover 16, the tail end of the support shaft 3 is provided with a clamping groove and is embedded with the anti-rolling plate 7, and the anti-rolling plate 7 is fixed on the movable pulley 1 and the fixed pulley 2 respectively, the reinforcing plate 6 is arranged at the middle position of the axial pulley 4, the rope head plate 8 is arranged on the fixed pulley frame 2, the guide wheel 10 is arranged on the triangular support connecting shaft to make rotary motion, and the steel wire rope 13 is wound in the groove of the pulley 4 on the movable pulley 1 and the fixed pulley 2.
[0027] Specific implementation method two: combined with Figure 1 And Figure 2The embodiment is described, the straight moving plate 14 and the lengthening plate 15 in the movable pulley 1 described in the first embodiment are axially horizontal, the uneven force of the twisted steel wire rope 13 during operation is prevented, the wear of the pulley and the steel wire is generated, the effective length of the steel wire rope 13 is exceeded after the lengthening of the luffing arm, the steel wire cable needs to be connected in series between the luffing arm and the movable pulley 1 to ensure the normal operation of the equipment, and the lengthening plate 15 must be connected to the high-strength lengthening plate 15 to ensure the safe operation of the pulley mechanism. The straight moving plate 14 belongs to the reinforcing plate in the movable pulley 1, the lengthening plate 15 is placed in the wrong position after the disassembly of the boom, and is directly connected. According to the quality safety system, it is not allowed, so the position of the straight plate 14 needs to be set in parallel after the disassembly of the luffing arm.
[0028] The third embodiment is described. Figure 1 And Figure 2 The embodiment is described, one end of the fixed pulley 2 is connected to the connecting plate 11 through the connecting pin 12 and rotates. After the connecting plate is connected to the coaxial shaft of the triangular support arm, it needs to be ensured that it is installed in the support plate on both sides of the support shaft, and plays a role in positioning the fixed pulley 2, preventing the fixed pulley 2 from moving along the axis, ensuring that the horizontal center and the vertical center of the movable pulley 1 and the fixed pulley 2 coincide, preventing the center of gravity from deviating during the operation of the steel wire rope 13, and preventing the derailment accident of the steel wire rope 13.
[0029] The fourth embodiment is described. Figure 1 And Figure 2 The embodiment is described, two bearings are installed in the inner hole of the pulley 4, and a snap spring retainer is installed between them, and the support shaft 3 is connected in series together and rotates at a fixed position on the movable pulley 1 and the fixed pulley 2. After the support shaft 3 is installed in the fixed pulley 2 and the movable pulley 1, the two shafts of the movable pulley 1 and the fixed pulley 2 are parallel to each other during operation, preventing accidents such as derailment of the steel wire rope 13 during operation.
[0030] The fifth embodiment is described. Figure 1 And Figure 2 The embodiment is described, two bearings are installed in the inner hole of the pulley 4, and a snap spring retainer is installed between them, and the support shaft 3 is connected in series together and rotates at a fixed position on the movable pulley 1 and the fixed pulley 2. The support shaft sleeve 9 needs to be connected between the pulleys 4 to ensure that there is no interference between them during operation, and to reduce unnecessary losses caused by mutual friction.
[0031] The sixth embodiment is described. Figure 1 And Figure 2The embodiment is described, the embodiment is two bearings in the inner hole of the pulley 4 and is supported by the snap spring retainer, and is rotated in a fixed position on the movable pulley 1 and the fixed pulley 2 respectively through the support shaft 3. The two bearings in the inner hole of the pulley 4 are supported by the snap spring retainer, the mutual rotation friction loss of the two bearings is prevented, the stress concentration phenomenon caused by the single shaft bearing is reduced, the lubricating oil channel in the support shaft 3 is reserved, and the clearance between the bearings is also beneficial to the circulation of the lubricating grease.
[0032] Specific embodiment seven: in combination Figure 1 And Figure 2 The embodiment is described, the embodiment is that the rope blocking plate 5 is arranged on the outer side of the circumference of the pulley 4, the protection function is always ensured from the combination point of the pulley 4 and the steel wire rope 13 to the leaving point of the pulley 4 and the steel wire rope 13, so that the accident of the steel wire rope 13 derailment is prevented, but the running track of the steel wire rope 13 in the normal running process is not affected.
[0033] Specific embodiment eight: in combination Figure 1 And Figure 2 The embodiment is described, the embodiment is that the head end of the support shaft 3 is supported by the support shaft sleeve 9 and fixed by the fixed end cover 16, the tail end of the support shaft 3 is embedded with the anti-rolling plate 7, and the anti-rolling plate 7 is fixed on the movable pulley 1 and the fixed pulley 2 respectively. It is ensured that the support shaft sleeve 9 is higher than the protruding part of the support shaft 3, so that the support shaft sleeve 9 does not support the fixed end cover 16, the left and right movement of the support shaft 3 is prevented, the running of the pulley 4 is affected, and the accident is caused.
[0034] Specific embodiment nine: in combination Figure 1 And Figure 2 The embodiment is described, the embodiment is further limited to the eighth embodiment, the inner slot of the tail end of the support shaft 3 is absolutely close to the anti-rolling plate 7, the cooperation of the fixed end cover 16 can fix the support shaft 3, the movement and rotation of the support shaft 3 are not affected by any external force, and the running safety of the whole pulley set is ensured.
[0035] Specific embodiment ten: in combination Figure 1 And Figure 2 The embodiment is described, the embodiment is that the reinforcing plate 6 is arranged in the middle position of the axial pulley 4, in order to reduce the weight, the pulley set adopts high-strength steel material, and the thickness and weight are reduced, the strength is ensured, the support plate must be arranged according to the position, the vertical and horizontal between the structure support plates are ensured, the two support shafts 3 are kept parallel during running, and the running of the steel wire 13 is prevented.
[0036] Specific embodiment eleven: in combination Figure 1 And Figure 2The embodiment is described, the large rope head plate 8 of the embodiment is installed on the fixed pulley frame, the guide wheel 10 is installed on the triangular support arm and rotates, so that the steel wire rope 13 is wound on the movable pulley 1 and the fixed pulley 2 in turn, and it is ensured that the steel wire rope 13 does not interfere with each other during operation. The guide wheel 10 is arranged on the left side of the rope head plate 8, which is opposite to the guide wheel 10, so as to ensure that the steel wire rope 13 forms a closed loop in the pulley block.
[0037] Specific implementation twelve: in combination Figure 1 And Figure 2 Figure 1 Figure 2 The embodiment is described, the rope head plate 8 of the embodiment is installed on the fixed pulley frame, the guide wheel 10 is installed on the triangular support arm connecting shaft and rotates. The guide wheel 10 and the power motor are arranged in vertical position to prevent dislocation rotation, which causes the steel wire rope 13 to derail or rub against the guide wheel 10, resulting in unnecessary friction loss.
[0038] In addition, the reinforcing plate 6 is arranged at the middle position of the pulley 4 axis, the movable pulley 1 and the pulley 4 are x, x is an even number, the reinforcing plate 6 is arranged at the middle position of the pulley 4 on both sides, the number of the fixed pulley 2 is x-1, the reinforcing plate 6 of the fixed pulley 2 is arranged at the middle position close to the rope head plate 8, and the number of the pulley 4 on both sides of the reinforcing plate 6 is 1.
[0039] The rope head plate 8 is arranged on the fixed pulley 2, which is used as a support plate of the support shaft 3 and is arranged at the opposite position of the initial winding of the steel wire rope 13 into the pulley 4.
[0040] The guide wheel 10 is arranged on the coaxial rotating shaft of the triangular support shaft connecting shaft, and is arranged in vertical position with the power motor. The outer side of the guide wheel 10 also needs a rope blocking rod.
[0041] The steel wire rope 13 is wound on the pulley 4 slot of the movable pulley 1 and the fixed pulley 2, the rope head is fixed on the power motor, and the steel wire rope 13 is wound into the pulley block from the opposite end of the rope head plate 8, and is wound on the movable pulley 1 and the fixed pulley 2 in turn and finally fixed on the rope head plate 8 by the unloading buckle.
[0042] The movable pulley 1 and the movable pulley 2 are reinforced by the reinforcing ring in the position matched with the shaft hole of the structure plate.
[0043] Working principle
[0044] The pulley block is arranged between the triangular supporting arm and the luffing arm, and the luffing arm is lifted by winding and unwinding the steel wire rope 13, one end of the steel wire rope 13 is controlled to be wound and unwound by the luffing motor, the other end is wound and unwound between the fixed pulley 2 and the movable pulley 1 and is finally fixed on the fixed pulley rope head plate, the movable pulley 1 is connected to the luffing arm, the fixed pulley 2 is connected to the triangular supporting arm, the steel wire rope 13 is wound from the front of the guide wheel 10, then is wound and unwound from the first pulley 4 at one end of the movable pulley 1, and then is wound and unwound from the first pulley 4 at the same end of the fixed pulley 2 and the driven wheel, and finally is fixed on the rope head plate through the shackle, so that the steel wire rope 13 forms a closed loop.
[0045] In use, the luffing motor rotates to contract or release the steel wire rope 13, and the steel wire rope 13 drives the fixed pulley 2 and the movable pulley 1 to approach or move away, so that the luffing arm is lifted.
[0046] There are two pairs of connecting plates on the movable pulley 1, which are the lengthening plate 14 and the straight moving plate 15, because of weight reduction and different lengths of the luffing arm, the steel wire rope 13 is set to a certain length, and when the length exceeds the certain length, the movable pulley cannot be directly connected to the luffing arm, the greatest feature of the design is that the steel wire rope is equivalent to its highest strength under the condition of not being damaged by stress but only being subjected to tension, so that the movable pulley 1 and the luffing arm can be connected by a plurality of steel wire cables, the lengthening plate 14 is connected to the movable pulley 1 to ensure the strength, the steel wire cable is inserted into the lengthening plate 14, which reduces the stretching length of the steel wire rope 13 between the movable pulley 1 and the fixed pulley 2, reduces the visual obstruction of the operator, reduces the weight, and is connected to the triangular supporting shaft through the connecting plate 11 at one end of the fixed pulley 2, so that the luffing arm can be easily disassembled when the pulley block fails, and the entire luffing mechanism of the luffing arm does not need to be disassembled for maintenance and replacement. The lengthening of the connecting plate 11 also moves the fixed pulley 2 away from the inner corner point, increases the pitch angle of the luffing arm, and does not affect the stability of the pulley block.
[0047] The design retains the triangular supporting arm, makes changes to the pulley block, and further improves the lifting carrying capacity, reduces the size, simplifies the whole pulley block, facilitates maintenance, reduces the wear and loss of the pulley and the steel wire rope, and provides a wider view during operation, which makes it easier to find and eliminate problems when checking faults.
[0048] The application designs a simple movable arm luffing vertical pulley block to reduce the weight of the entire machine device, improve the lifting tonnage of the device, and make installation simpler, the operator has a wider view when observing the working state of the luffing mechanism, the existence of faults is more easily found and eliminated, the occurrence of accidents is reduced, and the working efficiency is improved, the mechanism can be simply changed when in use, and is used as a lifting hoist. The utility model is suitable for the field of mechanical equipment with luffing arm lifting.
[0049] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A luffing vertical pulley block, characterized by: The device comprises a movable pulley (1), a fixed pulley (2), a supporting shaft (3), a pulley (4), a rope blocking plate (5), a reinforcing plate (6), an anti-rolling plate (7), a rope head plate (8), a supporting shaft sleeve (9), a guide wheel (10), a connecting plate (11), a connecting pin (12), a steel wire rope (13), an extension plate (15), a direct-acting plate (14), and a fixed end cover (16). The extension plate (15) and the direct-acting plate (14) in the movable pulley (1) are connected to the variable amplitude arm through the connecting pin (12) and make rotational movement according to the working condition, one end of the fixed pulley (2) is connected to the connecting plate (11) through the connecting pin (12) to make rotational movement, the other end of the connecting plate (11) is connected to the triangular supporting arm connecting shaft to make rotational movement, the inner holes of the pulleys (4) are each provided with two bearings and a clamping spring retainer ring therebetween, and the pulleys (4) are connected together through the supporting shaft (3) to make rotational movement at a fixed position on the movable pulley (1) and the fixed pulley (2) respectively, the rope blocking plate (5) is arranged outside the circumference of the pulley (4), the head end of the supporting shaft (3) is supported by the supporting shaft sleeve (9) and fixed by the fixed end cover (16), the tail end of the supporting shaft (3) is provided with a clamping groove and embedded with the anti-rolling plate (7), and the anti-rolling plate (7) is fixed on the movable pulley (1) and the fixed pulley (2) respectively, the reinforcing plate (6) is arranged at the middle position of the axial pulley (4), the rope head plate (8) is arranged on the fixed pulley (2), the guide wheel (10) is arranged on the triangular supporting arm connecting shaft to make rotational movement, and the steel wire rope (13) is wound in the groove of the pulley (4) on the movable pulley (1) and the fixed pulley (2).
2. A luffing vertical pulley block according to claim 1, characterized in that: When the extension plate (15) is connected with the excessively long variable amplitude arm, a steel wire cable is arranged between them for connection.
3. A luffing vertical pulley block according to claim 2, characterized in that: The connecting positions of the variable amplitude arms are at the head end positions of the variable amplitude arms.
4. A luffing vertical pulley block according to claim 1, characterized in that: The connecting plate (11) is installed on the inner side of the two end supporting plates of the triangular supporting arm.
5. A luffing vertical pulley block according to claim 1, characterized in that: The supporting shaft sleeve (9) is arranged between the pulleys, an oil channel is arranged in the supporting shaft (3), and oil injection holes are arranged at the two ends.
6. A luffing vertical pulley block according to claim 5, characterized in that: The number of the pulleys (4) arranged on the movable pulley (1) is X, and X is an even number.
7. A luffing vertical pulley block according to claim 6, characterized in that: The number of the pulleys (4) arranged on the fixed pulley (2) is Y, and Y is X-1.
8. A luffing vertical pulley block according to claim 1, characterized in that: The rope blocking plate (5) is arranged along the outer circle of the pulley (4).
9. A luffing vertical pulley block according to claim 1, characterized in that: The head end of the supporting shaft (3) is fixed by the fixed end cover (16) supported by the supporting shaft sleeve (9), the supporting shaft sleeve (9) is higher than the extension height of the supporting shaft (3), the fixed end cover (16) is supported on the supporting shaft sleeve (9) and is axially fixed to the supporting shaft (3) through bolts.
10. A luffing vertical pulley block according to claim 9, characterized in that: The fixing hole of the anti-rolling plate (7) is a long hole, the anti-rolling plate (7) is tightly attached to the clamping groove of the supporting shaft (3) in the radial direction, and is fixed through bolts.