A heavy hammer position limiting device with oil stain cleaning and variable inner diameter expansion function

Abstract

The application discloses a heavy hammer limiting device with oil stain cleaning and variable inner diameter expansion functions, which is arranged at the inner ring position of the heavy hammer, wrapped outside the steel wire rope and in contact with the outer surface of the steel wire rope, and comprises an oil stain cleaning mechanism and a variable diameter mechanism arranged on the oil stain cleaning mechanism. The oil stain cleaning mechanism comprises a sleeve and a plurality of fixing rings, the fixing rings are arranged on the sleeve in a detachable mode and coaxially arranged with the sleeve, a plurality of ball bearings are arranged on the side wall of the fixing ring, the sleeve and the fixing rings are arranged at the inner ring position of the heavy hammer and wrapped outside the steel wire rope, the ball bearings are in contact with the outer surface of the steel wire rope, and the variable diameter mechanism is arranged on the sleeve and the fixing rings. The application solves the problem that the existing heavy hammer limiting device is adhered by oil stains and mis-triggered, and solves the adaptability problem of the heavy hammer cooperating with the crane.

Description

Technical Field

[0001] This invention relates to counterweight limiting technology on lifting equipment, and more specifically, to a counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions. Background Technology

[0002] Wire rope is one of the most critical components of any lifting machinery, and its safety and reliability are paramount for smooth operation. Regular lubrication (grease) is necessary to ensure the wire rope's extensibility, reduce friction, and extend its service life. However, when the wire rope is excessively contaminated with oil, the inner wall of the counterweight limit switch frequently comes into contact with the grease, leading to frequent false triggering. The hazards of this false triggering are twofold: First, it impacts the electrical control circuit and mechanical mechanisms. Because it involves a sudden, forced disconnection of the power circuit, the impact on both the electrical and mechanical structures is enormous. Second, once the counterweight limit switch is activated, manual reset is required. Personnel must climb onto the trolley, lift the eccentric counterweight, and activate the reset switch to restore power. This cumbersome and dangerous reset procedure, along with the disruption to production, cannot be effectively addressed. Furthermore, excessive oil accumulation on the inner wall of the counterweight limit switch frequently results in false triggering. Currently, cleaning is done manually, which is time-consuming, labor-intensive, and carries the risk of working at height.

[0003] Currently, most counterweight limiters are installed and used on lifting equipment. Depending on the lifting class, load and wire rope thickness, the size of the counterweight limiter varies, with the main difference being the diameter of the counterweight hole.

[0004] If this device needs to be installed on counterweights with different aperture sizes, the device's shape will need to be remolded, resulting in significant manpower and financial costs. Therefore, resolving the issue of the device's installation with the counterweight's limiting mechanism and ensuring its adaptability to all sizes is crucial to solving this problem. Summary of the Invention

[0005] To address the aforementioned deficiencies in the existing technology, the purpose of this invention is to provide a counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions, solving the problem of false triggering caused by oil stains adhering inside the existing counterweight limiting device, and also solving the problem of adaptability with cranes in the counterweight operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions is provided at the inner ring position of the counterweight and covers the outer side of the wire rope, and contacts the outer surface of the wire rope. It includes an oil stain cleaning mechanism and a variable diameter mechanism provided on the oil stain cleaning mechanism.

[0008] The oil stain cleaning mechanism includes a sleeve and multiple fixing rings. The fixing rings are detachably mounted on the sleeve and coaxially arranged with the sleeve. Multiple balls are provided on the side wall of the fixing rings. The sleeve and the fixing rings are located in the inner ring position of the counterweight and cover the outer side of the wire rope. The balls are in contact with the outer surface of the wire rope.

[0009] The variable diameter mechanism is provided on the sleeve and the fixed ring, so that the sleeve and the fixed ring can be adapted to the weights and wire ropes of different specifications.

[0010] Preferably, the weight is provided with a hook, and a traction rope is connected to the hook.

[0011] Preferably, the detachable structure specifically comprises:

[0012] The sleeve is provided with multiple mounting slots;

[0013] The fixing ring is located in the corresponding mounting slot and is fixed by a buckle.

[0014] Preferably, the variable diameter mechanism is an outward extension structure, an outward expansion structure, a folding extension structure, or a shrinking stretching structure.

[0015] Preferably, the outwardly extending structure includes a body section and a variable-diameter section connected to the body section via a variable-diameter guide rail;

[0016] Both ends of the variable diameter guide rail are connected to the end of the main body section and the end of the variable diameter section respectively by pins, and can be extended by extension.

[0017] Preferably, the outward expansion structure includes a body segment, an active segment, and a growth segment;

[0018] One end of the growth segment is connected to the end of the movable segment via a pin, and the other end of the growth segment is in contact with and adapted to the end of the body segment.

[0019] Preferably, the folding extension structure includes a body segment and a folding segment;

[0020] The main body segment and the folded segment are interleaved;

[0021] The folding section adopts a bellows structure.

[0022] Preferably, the shrink-stretch structure includes a body segment and a folded segment;

[0023] The main body segment and the folded segment are interleaved;

[0024] The folded section adopts an elastic rack and pinion structure.

[0025] Preferably, the elastic rack structure includes an elastic upper rack, an elastic lower rack, and transition teeth;

[0026] The transition tooth is located between the elastic upper rack and the elastic lower rack and meshes with them.

[0027] This invention provides a counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions. It is an automated control system for the counterweight limiting based on the operation of a hoisting mechanism in large mechanical equipment, and can achieve self-cleaning of the wire rope surface, further enhancing and expanding its applicability. The design addresses the issue of false triggering due to oil adhesion inside the counterweight limiting device when there is excessive oil contamination in the wire rope, and also overcomes the drawbacks of repeated manual cleaning of the counterweight. Furthermore, its installation methods are expanded. The variable diameter design enhances the device's multi-scenario application capabilities. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the counterweight limiting device of the present invention;

[0029] Figure 2 yes Figure 1 Exploded view of the oil spill cleanup mechanism;

[0030] Figure 3 This is a schematic diagram of the variable diameter mechanism with an outward extension structure in the counterweight limiting device of the present invention;

[0031] Figure 4 This is a schematic diagram of the variable diameter mechanism in the counterweight limiting device of the present invention, which adopts an outward expansion structure.

[0032] Figure 5 This is a schematic diagram of the variable diameter mechanism in the counterweight limiting device of the present invention, which adopts a folded extension structure.

[0033] Figure 6 This is a schematic diagram of the variable diameter mechanism in the counterweight limiting device of the present invention, which adopts a shrinkage and stretching structure. Detailed Implementation

[0034] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Combination Figure 1 As shown, the present invention provides a counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions. It is located in the inner ring position of the counterweight 1 and covers the outer side of the wire rope 2, and contacts the outer surface of the wire rope 2. It includes an oil stain cleaning mechanism and a variable diameter mechanism provided on the oil stain cleaning mechanism.

[0036] The hammer 1 is equipped with a hook 3, and a traction rope 4 is connected to the hook 3.

[0037] The limit of the counterweight 1 is determined by the height of the traction rope 4 and the hook 3. The wire rope 2 moves up and down with the movement of the winch, while the counterweight 1 is in a fixed position and will only move after the support ring on the top of the movable pulley is lifted.

[0038] The oil stain cleaning mechanism includes a sleeve 5 and multiple retaining rings 6. The retaining rings 6 are detachably mounted on the sleeve 5 and coaxially arranged with the sleeve 5. Multiple balls 7 are provided on the side wall of the retaining rings 6. The sleeve 5 and the retaining rings 6 are located in the inner ring position of the counterweight 1 and cover the outer side of the wire rope 2. The balls 7 are in contact with the outer surface of the wire rope 2.

[0039] A sleeve 5 is used to separate the wire rope 2 from the counterweight 1. Multiple retaining rings 6 are installed on the sleeve 5, and numerous ball bearings 7 are mounted on the retaining rings 6. When the wire rope 2 passes through the sleeve 5, its surface rubs against the ball bearings 7, adhering oil and dirt to their surface. Based on the movement of the ball bearings 7 under force, the adhered oil and dirt are carried to the outside of the retaining rings 6. After one rotation, the oil and dirt will naturally fall off, preventing adhesion to the inner wall of the counterweight 1. Because the contact between the wire rope 2 and the ball bearings 7 on the retaining rings 6 changes, the contact area becomes smaller, making it less likely for grease on the surface of the wire rope 2 to adhere to the inside of the sleeve 5, thus achieving a non-adhesion effect.

[0040] Combination Figure 2 As shown, the detachable structure is specifically as follows:

[0041] The sleeve 5 has multiple mounting slots 51, and the fixing ring 6 is located in the corresponding mounting slot 51 and is fixed by the latch 8.

[0042] A variable diameter mechanism is provided on the sleeve 5 and the fixed ring 6, allowing the sleeve 5 and the fixed ring 6 to be adapted to counterweights 1 and wire ropes 2 of different diameters. The variable diameter mechanism is a three-dimensional expansion structure. Through various modification methods such as outward extension, outward expansion, folding extension, or contraction and stretching, the inner diameter of the counterweight limiting device of this invention is expanded to different degrees, enabling it to limit counterweights with different inner diameters, thereby achieving the expansion function of different sizes with a uniform size structure.

[0043] Combination Figure 3 As shown, the outwardly extending structure includes a main body section 9 and a variable diameter section 11 connected to the main body section 9 via a variable diameter guide rail 10.

[0044] Both ends of the variable diameter guide rail 10 are connected to the ends of the main body section 9 and the variable diameter section 11 respectively via pins.

[0045] The outer contour of the variable diameter section 11 is extended and moved along the outside of the weight limiting device of the present invention by means of the variable diameter guide rail 10, and the body section 9 fills the gap in the movement of the variable diameter section 11, thereby achieving the effect of expanding the inner diameter of the weight limiting device of the present invention.

[0046] Combination Figure 4 As shown, the outward expansion structure includes body segment 12, active segment 13, and growth segment 14.

[0047] One end of the growth segment 14 is connected to the end of the movable segment 13 via a pin, and the other end of the growth segment 14 is in contact with and adapted to the end of the main body segment 12.

[0048] When the required scenario needs to be expanded (the size of the hammer 1 is larger than the size of the hammer limiting device of the present invention), the movable segment 13 is moved and the hidden growth segment 14 is filled in.

[0049] Combination Figure 5 As shown, the folded extension structure includes a body segment 15 and a folding segment 16.

[0050] The main body segment 15 and the folded segment 16 are interleaved.

[0051] The folding section 16 adopts a bellows structure with a telescopic function. By stretching from the inner ring to the outside, the bellows structure can expand the inner diameter of the counterweight limiting device of the present invention, thereby improving the extension performance.

[0052] Combination Figure 6 As shown, the shrinkage-stretching structure includes a body segment 17 and a folded segment 18.

[0053] The main body segment 17 and the folded segment 18 are interleaved.

[0054] The folding section 18 adopts an elastic rack structure, which is a mechanical elastic rack structure including an upper elastic rack, a lower elastic rack, and a transition tooth. The transition tooth is located between the upper and lower elastic racks and meshes with them. By stretching, the internally overlapping racks can be extended, which also has the effect of expanding the inner diameter of the counterweight limiting device of the present invention.

[0055] This invention relates to a counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions. Based on the operating motion of a large mechanical equipment hoist, the counterweight limiting device achieves self-cleaning and further enhances and expands its applicability. It addresses the issue of false triggering due to oil adhesion inside the counterweight limiting device when there is excessive oil contamination in the wire rope, and also solves the drawbacks of repeated manual cleaning of the counterweight. Furthermore, its installation methods are expanded. The design of the counterweight is based on the diameter of the wire rope. If the embedded inner ring device used with the counterweight needs to accommodate different counterweight sizes, large-scale non-standard size manufacturing is required, which incurs significant costs and manpower. Additionally, the fixed-size design of other counterweight limiting devices also presents assembly challenges. This patent improves upon the counterweight limiting device based on the operating motion of a large mechanical equipment hoist, making it multifunctional and adaptable to various scenarios. Through different methods of expansion, it enhances the device's multi-scenario application performance. It has high application value for lifting operations in similar situations and can be widely adopted by major steel enterprises in China, showing a very broad application prospect.

[0056] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions, disposed at the inner ring position of the counterweight and covering the outer side of the wire rope, and in contact with the outer surface of the wire rope, characterized in that: Includes an oil stain cleaning mechanism and a variable diameter mechanism disposed on the oil stain cleaning mechanism; The oil stain cleaning mechanism includes a sleeve and multiple fixing rings. The fixing rings are detachably mounted on the sleeve and coaxially arranged with the sleeve. Multiple balls are provided on the side wall of the fixing rings. The sleeve and the fixing rings are located in the inner ring position of the counterweight and cover the outer side of the wire rope. The balls are in contact with the outer surface of the wire rope. The variable diameter mechanism is provided on the sleeve and the fixed ring, so that the sleeve and the fixed ring can be adapted to the weights and wire ropes of different specifications.

2. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 1, characterized in that: The hammer is equipped with a hook, and a traction rope is attached to the hook.

3. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 1, characterized in that, The detachable structure is specifically as follows: The sleeve is provided with multiple mounting slots; The fixing ring is located in the corresponding mounting slot and is fixed by a buckle.

4. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 1, characterized in that: The variable diameter mechanism is an outward extension structure, an outward expansion structure, a folding extension structure, or a shrinking stretching structure.

5. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 4, characterized in that: The outwardly extending structure includes a main body section and a variable diameter section connected to the main body section via a variable diameter guide rail; Both ends of the variable diameter guide rail are connected to the end of the main body section and the end of the variable diameter section respectively by pins.

6. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 4, characterized in that: The outward expansion structure includes a body segment, an active segment, and a growth segment; One end of the growth segment is connected to the end of the movable segment via a pin, and the other end of the growth segment is in contact with and adapted to the end of the body segment.

7. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 4, characterized in that: The folding extension structure includes a body segment and a folding segment; The main body segment and the folded segment are interleaved; The folding section adopts a bellows structure.

8. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 4, characterized in that: The shrink-stretch structure includes a body segment and a folded segment; The main body segment and the folded segment are interleaved; The folded section adopts an elastic rack and pinion structure.

9. The counterweight limiting device with oil stain cleaning and variable inner diameter expansion functions according to claim 8, characterized in that: The elastic rack structure includes an elastic upper rack, an elastic lower rack, and transition teeth; The transition tooth is located between the elastic upper rack and the elastic lower rack and meshes with them.

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