Device for preventing upper pulley of crane from falling off track

Abstract

The device comprises a protective shell, a transmission shaft is rotatably connected to the interior of the protective shell, a rotating pulley is fixedly connected to the surface of the transmission shaft, a steel wire rope is slidably connected to the surface of the rotating pulley, and limiting supporting plates are fixedly connected to the left end and the right end of the protective shell. The left end and the right end of the protective shell are fixedly connected with fixing supports, the tops of the fixing supports are fixedly connected with supporting transverse rods, the surfaces of the supporting transverse rods are fixedly connected with supporting clamping blocks, the left end and the right end of the protective shell are fixedly connected with fixing transverse plates, and the front faces of the fixing transverse plates are fixedly connected with supporting rods; and the top of the supporting rod is slidably connected with an anti-deviation frame, the interior of the anti-deviation frame is in threaded connection with a distance adjusting screw rod, the surface of the distance adjusting screw rod is in threaded connection with a locking nut, and the rear end of the anti-deviation frame is fixedly connected with a limiting spring.

Description

Technical Field

[0001] This invention belongs to the field of crane pulley anti-fall technology, specifically relating to a crane pulley anti-fall device. Background Technology

[0002] Crane wire rope anti-derailment devices are systematic protection mechanisms specifically designed to prevent high-risk accidents such as wire ropes detaching from the hook or pulleys. The structure of this device directly impacts the safety of personnel and the surrounding environment. Its design requires thorough consideration of the actual operating conditions of each component of the system and the potential risk levels resulting from operational defects. The anti-derailment device is a crucial component of the crawler crane's hook pulley system; its primary function is to prevent accidents caused by accidental slippage of heavy objects during lifting.

[0003] In existing pulley anti-derailment structures, the wire rope may slip out or bounce out of the pulley groove after prolonged use, leading to a derailment accident. This also makes it difficult for equipment operators to flexibly limit and adjust the rotating wire rope.

[0004] In view of the above factors, a crane pulley anti-derailment device is provided to prevent the wire rope from slipping out of the groove inside the rotating pulley. When the anti-derailment frame contacts the front surface of the rotating pulley and the wire rope, it can ensure that the rotating pulley and the wire rope drive deviate. Summary of the Invention

[0005] The purpose of this invention is to provide a crane pulley anti-derailment device to solve the problems mentioned in the background art.

[0006] The objective of this invention is achieved through the following technical solution: a crane pulley anti-fall device, comprising a protective housing, a drive shaft rotatably connected inside the protective housing, a rotating pulley fixedly connected to the surface of the drive shaft, and a steel wire rope slidably connected to the surface of the rotating pulley;

[0007] Limiting plates are fixedly connected to both the left and right ends of the protective shell, and fixed brackets are fixedly connected to both the left and right ends of the protective shell. A support crossbar is fixedly connected to the top of the fixed bracket, and a support block is fixedly connected to the surface of the support crossbar.

[0008] The protective shell is fixedly connected to both the left and right ends with fixed horizontal plates, and a support rod is fixedly connected to the front of the fixed horizontal plate. An anti-deviation frame is slidably connected to the top of the support rod.

[0009] Furthermore, the anti-deviation frame is internally threaded with an adjusting screw, the adjusting screw is externally threaded with a locking nut, and a limit spring is fixedly connected to the rear end of the anti-deviation frame.

[0010] Furthermore, the anti-deviation frame is located on the front of the protective shell, and the adjusting screw extends through the locking nut and the anti-deviation frame into the interior of the protective shell. Support crossbars extend from the top of two fixed brackets and support blocks are welded on them.

[0011] Furthermore, there are two support rods and limiting springs, and the two support rods and limiting springs are symmetrically distributed with respect to the protective shell.

[0012] Furthermore, the limiting spring is positioned at the top of the support rod and makes elastic contact with the back of the frame.

[0013] Furthermore, the rotating pulleys and wire ropes are provided in multiple quantities, and the multiple rotating pulleys and wire ropes are distributed at equal intervals around the transmission shaft.

[0014] Furthermore, the drive shaft surface is fixedly connected with several rotating pulleys that are equidistantly distributed around it. These rotating pulleys together form a multi-stage guiding system. The rotating pulleys cause the wire rope to maintain a straight trajectory during operation, and each of the rotating pulleys slides with the same wire rope to form a continuous traction circuit.

[0015] Furthermore, the support block is fixedly connected to the surface of the support rod, the limiting spring is located at the top of the support rod, and the fixing cross plate is fixedly connected to the top of the support rod;

[0016] The fixed bracket and supporting crossbar are configured as two, and the two fixed brackets and supporting crossbars are symmetrically distributed on the left and right sides with the protective shell as the center.

[0017] A method for using a crane pulley anti-derailment device includes the following steps;

[0018] When the anti-deviation frame moves back and forth on the top of the support rod by rotating the adjusting screw, the locking nut 13 on the surface can drive the rotating pulley and wire rope on the surface of the drive shaft, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-deviation frame contacts the front surface of the rotating pulley and wire rope, it can ensure that the rotating pulley and wire rope are driven to deviate. By setting two fixed brackets, support crossbars are extended from the top of each bracket, and support blocks are welded on them for auxiliary positioning and load distribution. Fixed crossbars are also set on both sides of the protective shell. The fixed crossbars are rigidly connected to the vertical support rod below, forming a stable column-type load-bearing structure. By setting limit springs, they are placed on the top of the support rod and elastically contact the back of the frame, which plays a buffering and shock absorption function, absorbing excess kinetic energy and quickly returning to the original shape, preventing the accumulation of damage caused by rigid collision.

[0019] An application of a crane pulley anti-derailment device is disclosed. This device is applied to the field of crane pulley anti-derailment. When the operator rotates the adjusting screw, the locking nut on the surface moves the anti-derailment frame back and forth on the top of the support rod. This drives the rotating pulley and wire rope on the drive shaft surface, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-derailment frame contacts the front surface of the rotating pulley and wire rope, it ensures that the rotating pulley and wire rope are driven to deviate.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention allows the anti-deviation frame to move back and forth on the top of the support rod by rotating the adjusting screw, which in turn drives the locking nut on the surface. This drives the rotating pulley and wire rope on the surface of the transmission shaft, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-deviation frame contacts the front surface of the rotating pulley and wire rope, it ensures that the rotating pulley and wire rope are driven to deviate.

[0022] This invention features two fixed supports with crossbars extending from their tops, each welded with a support block for auxiliary positioning and load distribution. Fixed crossbars are also provided on both sides of the protective outer shell, rigidly connected to the vertically erected support rods below, forming a stable column-type load-bearing structure. A limiting spring is installed at the top of the support rods and elastically contacts the back of the frame, thus providing a buffer and shock absorption function, absorbing excess kinetic energy and quickly restoring the original shape, preventing the accumulation of damage caused by rigid collisions. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of another state of the present invention;

[0025] Figure 3 This is a bottom-view schematic diagram of the present invention;

[0026] Figure 4 This is a schematic diagram of the oblique projection of the present invention. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Specific Implementation Example 1:

[0031] like Figures 1-4 As shown, a crane pulley anti-fall device includes a protective shell 1, a drive shaft 2 is rotatably connected inside the protective shell 1, a rotating pulley 3 is fixedly connected to the surface of the drive shaft 2, and a steel wire rope 4 is slidably connected to the surface of the rotating pulley 3.

[0032] Limiting plates 5 are fixedly connected to both the left and right ends of the protective shell 1. Fixed brackets 6 are fixedly connected to both the left and right ends of the protective shell 1. A supporting crossbar 7 is fixedly connected to the top of the fixed bracket 6. A supporting block 8 is fixedly connected to the surface of the supporting crossbar 7. Fixed plates 9 are fixedly connected to both the left and right ends of the protective shell 1. A supporting rod 10 is fixedly connected to the front of the fixed plate 9. An anti-deviation frame 11 is slidably connected to the top of the supporting rod 10. An adjusting screw 12 is threaded inside the anti-deviation frame 11. A locking nut 13 is threaded on the surface of the adjusting screw 12. A limiting spring 14 is fixedly connected to the rear end of the anti-deviation frame 11.

[0033] The number of rotating pulleys 3 and wire ropes 4 is set to several, and the several rotating pulleys 3 and wire ropes 4 are distributed at equal intervals around the transmission shaft 2.

[0034] The drive shaft 2 is a key component for power transmission. Several rotating pulleys 3 are fixedly connected to its surface and are equidistantly distributed around it. These pulleys together form a multi-stage guiding system to ensure that the wire rope 4 always maintains a straight trajectory during operation and avoids lateral displacement caused by off-center load or vibration. Each rotating pulley 3 slides with the same wire rope 4 to form a continuous traction circuit. This symmetrical arrangement balances the force distribution and improves the overall transmission efficiency.

[0035] The number of fixed brackets 6 and supporting crossbars 7 is set to two. The two fixed brackets 6 and supporting crossbars 7 are symmetrically distributed on the left and right sides with the protective shell 1 as the center. When the operator rotates the adjusting screw 12, it drives the locking nut 13 on the surface to move the anti-deviation frame 11 back and forth on the top of the supporting rod 10. This can drive the rotating pulley 3 and steel wire rope 4 on the surface of the transmission shaft 2, preventing the steel wire rope 4 from sliding out of the groove inside the rotating pulley 3. When the anti-deviation frame 11 contacts the front surface of the rotating pulley 3 and steel wire rope 4, it can ensure that the rotating pulley 3 and steel wire rope 4 are driven to deviate.

[0036] The support block 8 is fixedly connected to the surface of the support rod 10, the limiting spring 14 is located at the top of the support rod 10, and the fixing plate 9 is fixedly connected to the top of the support rod 10.

[0037] The number of support rods 10 and limiting springs 14 is set to two, and the two support rods 10 and limiting springs 14 are symmetrically distributed with the protective shell 1 as the center.

[0038] The anti-deviation frame 11 is located on the front of the protective shell 1. The adjusting screw 12 passes through the locking nut 13 and the anti-deviation frame 11 and extends into the interior of the protective shell 1. Two fixed brackets 6 are provided, with support crossbars 7 extending from the top of each bracket, and support blocks 8 are welded on them for auxiliary positioning and load distribution. Fixed crossbars 9 are also provided on both sides of the protective shell 1. They are rigidly connected to the vertically erected support rods 10 below, forming a stable column-type load-bearing structure. A limiting spring 14 is provided, which is placed on the top of the support rods 10 and elastically contacts the back of the frame, thus playing a buffering and vibration absorption function, absorbing excess kinetic energy and quickly returning to its original shape, preventing the accumulation of damage caused by rigid collisions.

[0039] The rear end of the locking nut 13 contacts the front surface of the anti-deviation frame 11, the adjusting screw 12 is located at the top of the support rod 10, and the support rod 10 is located at the top of the limiting plate 5. Specific Implementation Example 2:

[0041] A method for using a crane pulley anti-derailment device includes the following steps;

[0042] When the anti-deviation frame moves back and forth on the top of the support rod by rotating the adjusting screw, thereby driving the locking nut 13 on the surface, it can drive the rotating pulley and wire rope on the surface of the drive shaft, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-deviation frame contacts the front surface of the rotating pulley and wire rope, it can ensure that the rotating pulley and wire rope are driven to deviate. By setting two fixed brackets, support crossbars extend from the top of each bracket, and support blocks are welded on them for auxiliary positioning and load distribution. Fixed crossbars are also set on both sides of the protective shell, which are rigidly connected to the vertically erected support rod below, forming a stable column-type load-bearing structure. By setting limit springs, it is Placed on top of the support rod and in elastic contact with the back of the frame, it serves as a buffer and shock absorber, absorbing excess kinetic energy and quickly returning to its original shape, preventing the accumulation of damage caused by rigid collisions. Using the above technical solution and inspection and recovery methods, the driver immediately contacts the inspector via walkie-talkie to board the vehicle for inspection. The driver then resets all controllers to zero, boards the vehicle to check if the upper pulley has derailed or exhibits other abnormalities. If no derailment or other abnormalities occur, the driver returns to the cab and presses and holds the "Light Test" button on the left-side control panel for ten seconds. At this point, the continuous beeping stops, the main lifting mechanism has successfully reset, and is in trigger state. If the main lifting mechanism is improperly operated and this device is triggered, the main lifting mechanism will be de-energized, all other mechanisms will operate normally, and the continuous beeping will resume. Specific Implementation Example 3:

[0044] An application of a crane pulley anti-derailment device is disclosed. This device is applied to the field of crane pulley anti-derailment. When the operator rotates the adjusting screw, the locking nut on the surface moves the anti-derailment frame back and forth on the top of the support rod. This drives the rotating pulley and wire rope on the drive shaft surface, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-derailment frame contacts the front surface of the rotating pulley and wire rope, it ensures that the rotating pulley and wire rope are driven to deviate.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for preventing crane pulleys from derailing, characterized in that: The system includes a protective housing, with a drive shaft rotatably connected inside the protective housing, a rotating pulley fixedly connected to the surface of the drive shaft, and a steel wire rope slidably connected to the surface of the rotating pulley. Limiting plates are fixedly connected to both the left and right ends of the protective shell, and fixed brackets are fixedly connected to both the left and right ends of the protective shell. A support crossbar is fixedly connected to the top of the fixed bracket, and a support block is fixedly connected to the surface of the support crossbar. The protective shell is fixedly connected to both the left and right ends with fixed horizontal plates, and a support rod is fixedly connected to the front of the fixed horizontal plate. An anti-deviation frame is slidably connected to the top of the support rod.

2. The anti-derailment device for crane pulleys according to claim 1, characterized in that: The anti-deviation frame is internally threaded with an adjusting screw, and the adjusting screw is threaded with a locking nut. A limit spring is fixedly connected to the rear end of the anti-deviation frame.

3. The anti-derailment device for crane pulleys according to claim 2, characterized in that: The anti-deviation frame is located on the front of the protective shell. The adjusting screw passes through the locking nut and the anti-deviation frame and extends into the interior of the protective shell. Support crossbars extend from the top of two fixed brackets and support blocks are welded on them.

4. The anti-derailment device for crane pulleys according to claim 3, characterized in that: The support rod and the limiting spring are provided in pairs, and the two support rods and the limiting springs are symmetrically distributed with the protective shell as the center.

5. The anti-derailment device for crane upper pulleys according to claim 4, characterized in that: The limiting spring is positioned at the top of the support rod and makes elastic contact with the back of the frame.

6. The anti-derailment device for crane upper pulleys according to claim 5, characterized in that: The rotating pulleys and wire ropes are configured in multiples, and the multiple rotating pulleys and wire ropes are equidistantly distributed around the transmission shaft.

7. The anti-derailment device for crane pulleys according to claim 6, characterized in that: The drive shaft surface is fixedly connected to several rotating pulleys that are equidistantly distributed around it. These rotating pulleys together form a multi-stage guiding system. The rotating pulleys cause the wire rope to maintain a straight trajectory during operation, and each of the rotating pulleys slides with the same wire rope to form a continuous traction circuit.

8. The anti-derailment device for crane upper pulleys according to claim 7, characterized in that: The support block is fixedly connected to the surface of the support rod, the limiting spring is located at the top of the support rod, and the fixing cross plate is fixedly connected to the top of the support rod. The fixed bracket and supporting crossbar are configured as two, and the two fixed brackets and supporting crossbars are symmetrically distributed on the left and right sides with the protective shell as the center.

9. A method of using the anti-derailment device for the upper pulley of a crane according to claim 8, characterized in that: Includes the following steps; When the anti-deviation frame moves back and forth on the top of the support rod by rotating the adjusting screw, the locking nut 13 on the surface can drive the rotating pulley and wire rope on the surface of the drive shaft, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-deviation frame contacts the front surface of the rotating pulley and wire rope, it can ensure that the rotating pulley and wire rope are driven to deviate. By setting two fixed brackets, support crossbars are extended from the top of each bracket, and support blocks are welded on them for auxiliary positioning and load distribution. Fixed crossbars are also set on both sides of the protective shell. The fixed crossbars are rigidly connected to the vertical support rod below, forming a stable column-type load-bearing structure. By setting limit springs, they are placed on the top of the support rod and elastically contact the back of the frame, which plays a buffering and vibration absorption function, absorbing excess kinetic energy and quickly returning to the original shape, preventing the accumulation of damage caused by rigid collision.

10. An application of the crane pulley anti-derailment device according to claim 8, wherein the crane pulley anti-derailment device is applied to the field of crane pulley anti-derailment, and when the operator rotates the adjusting screw to drive the locking nut on the surface to move the anti-deviation frame back and forth on the top of the support rod, the rotating pulley and wire rope on the surface of the transmission shaft can be driven, preventing the wire rope from slipping out of the groove inside the rotating pulley. When the anti-deviation frame contacts the front surface of the rotating pulley and the wire rope, it can ensure that the rotating pulley and the wire rope are driven to deviate.

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