A crane drum support shaft fracture protection adjustment device

Abstract

This utility model provides a crane drum support shaft fracture protection adjustment device, relating to the field of lifting machinery. It includes: a base, fixed to a platform below the drum by anchor bolts or welding; the base has a lower slide rail surface and side guide grooves inside, anchor mounting holes at both ends, and tapping holes at the top for installing a top cover; a lifting bracket installed above the base, its lower part designed as a ramp, with freely rotatable brackets at both ends of the upper part for supporting the drum; a slide rail set in a groove in the base, with a slot at the bottom and a guide nut installed; the slide rail moves horizontally to push the lifting bracket up and down; a two-way push rod connected to the guide nut of the slide rail, driving the slide rail to move left and right by rotation; and a top cover fixed to the upper part of the base. It effectively prevents the drum from falling after shaft breakage; it features high flexibility and adjustability, automatic centering, wide applicability, convenient installation and debugging, and strong promotion potential.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery, and in particular to a crane drum support shaft fracture protection adjustment device. Background Technology

[0002] Cranes are essential process equipment in modern industrial production, widely used in factories, warehouses, docks, and other locations as material handling equipment. A bridge crane mainly consists of mechanical parts, a metal structure, and electrical parts. The hoisting mechanism within the mechanical parts primarily comprises a drive unit, a transmission unit, a drum assembly, a pulley system, a lifting device, and a braking device. The drum assembly achieves lifting or traction functions by rotating and unwinding the wire rope. As the terminal component of power transmission, the drum converts the input power into the tension of the wire rope, thereby driving the lifting device to move up and down.

[0003] The drum assembly mainly consists of a drum, drum shaft, gear hub, drum hub, bearing housing, and bearings. In actual operation, the drum shaft and the reducer output shaft work together to rotate the drum assembly overhead. If the support shaft at one end breaks, it will cause instantaneous instability, and may even lead to the wire rope cutting, resulting in the risk of the suspended load falling or the risk of the hook coming off the hook. A broken drum shaft will cause the hoisting mechanism to completely lose its load-bearing capacity, the wire rope to lose tension control, and the wire rope to suddenly slacken at the moment of shaft breakage. The wire rope will fall out of the rope groove and wrap around the drive shaft, causing the system to jam or break again. The suspended load will fall freely under the action of gravity. If it is a casting crane used in a metallurgical environment, it will cause molten metal to splash, which can destroy the equipment below and cause mass casualties.

[0004] Traditional crane hoisting mechanisms lack anti-shaft devices under the drum assembly. They only have features to prevent the drum from falling from the trolley platform to the ground. Furthermore, replacing the drum assembly after a breakage requires the assistance of an upper maintenance crane for repositioning and reassembly. This traditional manufacturing method has the following drawbacks: (1) No safety devices: No stop device to prevent falling after shaft breakage and no measures to prevent further rope breakage hazards are installed, which does not protect the wire rope; (2) Complex installation and debugging: When replacing a new drum assembly, the crane above needs to cooperate with the operation, and the installation position needs to be adjusted multiple times; (3) No adjustability: The traditional installation method is to install a fixed plate under the drum, which does not play an adjustment role in the later drum replacement operation; (4) Long maintenance period: When replacing the drum, the entire crane needs to be stopped, and both the large and small trolleys are parked in the fixed maintenance area. If the crane is located in the middle of the factory, the working range of the cranes on the left and right will be affected; (5) High maintenance cost: The adjustment and replacement time is long, which hinders the operation of the surrounding equipment and increases the cost of use.

[0005] In recent years, crane manufacturers and owners have installed anti-fall plates or supporting sleepers to address the above problems. However, these mechanisms have not played a significant role in preventing falls or assisting in installation during actual use.

[0006] Therefore, developing a crane drum support shaft fracture protection adjustment device that is easy to install, simple to debug, highly reliable, and low in cost is of great practical significance. Utility Model Content

[0007] This utility model provides a crane drum support shaft fracture protection adjustment device, which solves the problem of existing crane drum support shaft fracture causing the wire rope to be cut, resulting in the risk of the suspended object falling or the hidden danger of the hook becoming detached.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A crane drum support shaft fracture protection adjustment device includes: The base is fixed to the table below the drum by anchor bolts or welding. The base has a lower slide rail surface and a side guide groove inside, and anchor mounting holes at both ends. The upper part has tapping holes for installing the top cover. The support bracket is installed above the base. Its lower part is designed as a ramp, and the upper two ends are equipped with freely rotating brackets to support the drum. The slide rail is set in the groove of the base, with a slot at the bottom and a guide nut installed. The slide rail moves horizontally to push the lifting bracket up and down. A two-way push rod is connected to the guide nut of the slide rail, and drives the slide rail to move left and right by rotation; The top cover, fixed to the upper part of the base, is used to protect the internal structure and guide the movement of the slide rail.

[0009] Furthermore, the lower part of the lifting bracket is provided with two first mounting holes for installing guide columns. After the guide columns pass through the mounting holes, they cooperate with the side guide grooves of the base to realize the up and down movement of the lifting bracket.

[0010] Furthermore, a second mounting hole is provided on each of the two sides of the upper part of the lifting bracket, and the bracket pin passes through the second mounting hole to install the bracket on the lifting bracket.

[0011] Furthermore, the support bracket has a smooth surface and a center distance of 5-10mm from the drum surface to prevent damage to the wire rope when the drum falls.

[0012] Furthermore, the lower plane of the guide groove of the slide rail contacts the lower plane of the slope of the lifting bracket, and the slide rail is moved horizontally by the rotation of the bidirectional push rod, thereby driving the lifting bracket to rise and fall.

[0013] Furthermore, the upper cover is fixed above the base by an upper cover nut assembly, and the upper cover is provided with a strip hole for the support bracket to pass through.

[0014] Furthermore, a push rod cap is fixedly installed on the outer side of the bidirectional push rod by bolts.

[0015] The beneficial effects of this utility model are as follows: The entire structure is made of mechanical parts, eliminating the need for limit switches and electrical controls. The components are modular, and the corresponding parts can be replaced and adjusted in a timely manner according to the size of the matching drum. The installation position is flexible and does not interfere with the normal operation of the mechanism.

[0016] High reliability: The lifting support rises and falls by using a screw to guide the slide rail to generate horizontal movement and using the wedge principle to drive its operation. It has fewer parts, higher strength, and its own mechanism can lock when there is no external power. Key components are heat-treated to improve hardness and wear resistance, so it maintains stability and reliability even in harsh environments with high temperature radiation and a lot of dust.

[0017] Low maintenance costs: All parts are mechanical structures with a long service life, requiring no frequent maintenance or replacement, thus reducing operating costs.

[0018] Currently, this crane drum support shaft fracture protection adjustment device has been widely applied to the company's bridge cranes, and its effectiveness has been well verified. From both the investment and usage, it has achieved excellent results. Safe operation ensures the safety of personnel and equipment on the ground, thus achieving safe production.

[0019] This utility model has the advantages of simple manufacturing, low investment, convenient installation and debugging, easy replacement, and reliable use. It can effectively prevent the drum from falling after the shaft breaks. It has the characteristics of high flexibility and automatic centering, wide application range, convenient installation and debugging, and strong promotion.

[0020] This invention protects the safe operation of the drum assembly, effectively preventing wire rope breakage accidents caused by shaft breakage. It also significantly shortens the time required to replace spare parts. Furthermore, this invention does not affect the existing crane layout. It can be installed independently, is flexible in location, and has adjustable space. It can also operate relatively independently, reducing the time spent by fixed cranes above the factory. This makes the invention more flexible and efficient, ensuring the efficient operation of the production line and reducing the risk of downtime due to accidents. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is the general drawing of the device of this utility model.

[0023] Figure 2 This is an exploded view of the components of the device of this utility model.

[0024] Figure 3 This is a schematic diagram of the installation of the device of this utility model.

[0025] Explanation of icon numbers: 1. Base; 2. Support bracket; 3. Slide rail; 4. Two-way push rod; 5. Bracket; 6. Top cover; 7. Top cover nut assembly; 8. Guide column; 9. Guide nut; 10. Bracket pin; 11. Push rod cover. Detailed Implementation

[0026] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0031] This utility model provides a technical solution: a crane drum support shaft fracture protection adjustment device, such as... Figure 1-3 As shown, it is installed below the drum, and its structure includes a base 1, a support bracket 2, a slide rail 3, a two-way push rod 4, an upper cover 6, and guide accessories.

[0032] The base 1 is fixed to the table below the drum by anchor bolts or welding. The base 1 has a lower slide rail 3 and a side guide groove inside, and anchor mounting holes at both ends. The upper part has tapping holes for installing the upper cover 6. The lifting bracket 2 is installed above the base 1. Its lower part is designed as a slope, and the upper two ends are equipped with freely rotatable brackets 5 for supporting the drum. The slide rail 3 is set in the groove of the base 1, with a slot at the bottom and a guide nut 9 installed. The slide rail 3 pushes the lifting bracket 2 to move up and down by moving horizontally. The bidirectional push rod 4 is connected to the guide nut 9 of the slide rail 3, and drives the slide rail 3 to move left and right by rotation; The top cover 6 is fixed to the upper part of the base 1 and is used to protect the internal structure and guide the movement of the slide rail 3.

[0033] The base 1 is a steel structure, which can be made of cast steel or steel plate splicing. It has a lower slide rail 3 and a side guide groove inside. There are foot mounting holes at both ends of the lower part, and tapping holes at the top for installing the top cover 6.

[0034] The lifting bracket 2 adopts a mechanical structure with a sloping lower part for raising and lowering the bracket. Two first mounting holes are provided at the bottom of the lifting bracket 2 for mounting guide columns 8. The guide columns 8 pass through the mounting holes and engage with the side guide grooves of the base 1, enabling the lifting bracket 2 to move up and down. A second mounting hole is provided on each side of the upper part of the lifting bracket 2. The bracket pin 10 passes through the second mounting hole to mount the bracket 5 onto the lifting bracket 2. The bracket 5 can rotate freely within a certain range to accommodate different drum diameters without causing hard damage to the drum surface.

[0035] The slide rail 3 is installed in the groove of the base 1. The lower part is slotted and a guide nut 9 is installed. When the bidirectional push rod 4 rotates, it moves left and right. The lower plane of the upper guide groove pushes the lifting bracket 2 to achieve up and down movement.

[0036] The lower plane of the guide groove of the slide rail 3 contacts the lower plane of the slope of the lifting bracket 2. The slide rail 3 is moved horizontally by the rotation of the bidirectional push rod 4, which drives the lifting bracket 2 to rise and fall.

[0037] The upper cover 6 is fixed above the base 1 by the upper cover nut assembly 7, and the upper cover 6 is provided with a strip hole for the support bracket 2 to pass through.

[0038] The outer side of the bidirectional push rod 4 is fixed with a push rod cap 11 by bolts.

[0039] When the bidirectional push rod 4 rotates clockwise, it pushes the guide nut 9, which in turn pushes the slide rail 3 to the right. The lower plane of the guide groove of the slide rail 3 pushes the lower plane of the lifting bracket 2 upward, thus achieving the purpose of the up-and-down movement of the lifting bracket 2. The slide rail 3 and the lower plane of the lifting bracket 2 are subject to physical friction, and the material needs to be heat-treated to improve its hardness and wear resistance.

[0040] This device can be fixed to the platform below the drum using anchor bolts or welding. The height is adjusted by changing the height of the support under base 1 according to the required dimensions. After installation, the distance between the top of the bracket 5 on the lifting bracket 2 and the center of the drum surface is 5-10mm. This device does not participate in any operation when the drum is working normally. If the drum shaft or the reducer shaft on the other side breaks, the drum will be caught by this device upon falling. Because the surface of bracket 5 is relatively smooth, it will not damage the wire rope. When a new drum or reducer needs to be installed, the drum is placed on this device, and the center height of the drum is adjusted by rotating the bidirectional push rod 4 on the side, thus greatly improving work efficiency. Installation position as follows: Figure 3 .

[0041] The invention operates by installing a support device below the drum. This device provides effective support should the drum support shaft break in an accident, causing the drum to fall. It also prevents the wire rope from coming into contact with other parts and causing friction that could lead to breakage. Furthermore, it provides positioning and adjustment mechanisms for later drum or support shaft replacement work. This achieves the goals of ensuring safe production and shortening maintenance time.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A crane drum support shaft fracture protection adjustment device, characterized in that, include: The base (1) is fixed to the table below the drum by anchor bolts or welding. The base (1) has a lower slide rail surface and a side guide groove inside, and foot mounting holes at both ends. The upper part has tapping holes for installing the top cover (6). The support bracket (2) is installed above the base (1). Its lower part is designed as a ramp, and the upper two ends are equipped with freely rotatable brackets (5) for receiving the drum. The slide rail (3) is set in the groove of the base (1), with a slot at the bottom and a guide nut (9) installed. The slide rail (3) pushes the lifting bracket (2) to move up and down by moving horizontally. The bidirectional push rod (4) is connected to the guide nut (9) of the slide rail (3) and drives the slide rail (3) to move left and right by rotation; The top cover (6) is fixed to the upper part of the base (1) to protect the internal structure and guide the movement of the slide rail (3).

2. The crane drum support shaft fracture protection adjustment device according to claim 1, characterized in that, The lower part of the lifting bracket (2) is provided with two first mounting holes for installing guide columns (8). After the guide columns (8) pass through the first mounting holes, they cooperate with the side guide groove of the base (1) to realize the up and down movement of the lifting bracket (2).

3. The crane drum support shaft fracture protection adjustment device according to claim 2, characterized in that, The upper two sides of the support bracket (2) are respectively provided with a second mounting hole, and the bracket pin (10) passes through the second mounting hole to install the bracket (5) on the support bracket (2).

4. The crane drum support shaft fracture protection adjustment device according to claim 1, characterized in that, The support bracket (5) of the lifting bracket (2) has a smooth surface and a center distance of 5~10mm from the surface of the drum, which is used to prevent the wire rope from being damaged when the drum falls.

5. The crane drum support shaft fracture protection adjustment device according to claim 1, characterized in that, The lower plane of the guide groove of the slide rail (3) contacts the lower plane of the slope of the lifting bracket (2). The slide rail (3) is moved horizontally by the rotation of the bidirectional push rod (4), which drives the lifting bracket (2) to rise and fall.

6. The crane drum support shaft fracture protection adjustment device according to claim 1, characterized in that, The upper cover (6) is fixed above the base (1) by the upper cover nut assembly (7), and the upper cover (6) is provided with a strip hole for the support bracket (2) to pass through.

7. The crane drum support shaft fracture protection adjustment device according to claim 1, characterized in that, The outer side of the bidirectional push rod (4) is fixed with a push rod cap (11) by bolts.

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