A machining lathe for hoisting opening and closing the winding drum shaft body of large hoisting equipment

Abstract

The utility model discloses a machining lathe for large -scale hoisting equipment hoist open -and -close reel shaft body, it includes small -size lathe work platform, tool rest subassembly, thimble subassembly, the small -size lathe work platform includes bottom plate, support plate, tool rest mounting panel, the bottom plate is fixedly connected with the bearing seat seat of reel shaft body, support plate is connected with bottom plate and tool rest mounting panel respectively, the tool rest subassembly includes tool rest base, tool rest upper plate, tool rest lower plate, turning tool and a plurality of locking bolt, the thimble subassembly includes fixed ring, thimble, fixed ring is equipped with thimble bearing in, the thimble includes the axle body of cooperation with thimble bearing, one end of axle body is equipped with the convex of cylindrical, the end face of reel shaft body is equipped with round recess, the convex and round recess can be interlocked. The utility model realizes the machining to large -scale equipment reel shaft body in the limited maintenance operation space to improve the maintenance efficiency, reduce the influence to production operation.

Description

Technical Field

[0001] This utility model relates to a machining lathe for the hoisting and closing drum shaft of large lifting equipment, belonging to the field of machining lathes and their components. Background Technology

[0002] Currently, the repair of drum shafts for large port equipment (such as ship loaders, ship unloaders, and gantry cranes) mainly relies on external machining. While traditional repair methods can repair drum shafts, they have many shortcomings. First, the repair efficiency is low, as external machining requires prolonged downtime for disassembly and transportation, leading to extended repair cycles. Second, the repair cost is high, with expensive external machining fees and additional costs related to labor and logistics. Furthermore, replacing the shaft with a new one incurs significant procurement costs. Additionally, the disassembly and installation processes require lifting equipment, which poses a risk of equipment tipping over and personnel injury if not handled properly. Third, the workspace is limited. Repair areas for drum shafts of large port lifting equipment (such as ship loaders, ship unloaders, and gantry cranes) are typically narrow, making it difficult to accommodate the large equipment. Moreover, traditional lathes are bulky and cannot be moved flexibly, preventing on-site machining operations. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a machining lathe for the shaft of the hoisting and closing drum of large lifting equipment. This solves the problems of complex processes, low efficiency, high costs, and safety hazards in the maintenance of the drum shaft of large equipment in ports. It enables the machining of the drum shaft of large equipment within a limited maintenance work space, thereby improving maintenance efficiency and reducing the impact on production operations.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A machining lathe for hoisting and closing drum shafts of large lifting equipment, comprising a small lathe work platform, a tool post assembly, and a center assembly; The small lathe working platform includes a base plate, a support plate, and a tool holder mounting plate. The base plate is located on one side of the bearing seat of the drum shaft, and one end of the base plate is fixedly connected to the bearing seat. One end of the support plate is connected to the base plate, and the other end is connected to the bottom surface of the tool holder mounting plate. The tool holder mounting plate is arranged at an angle and one end of it forms an angle of 30° to 35° with the upper surface of the bearing seat. The tool holder assembly includes a tool holder base, a tool holder upper plate, a tool holder lower plate, a lathe tool, and several locking bolts. The tool holder base is connected to the tool holder mounting plate, the tool holder lower plate is connected to the tool holder base, a support block is provided in the middle of the tool holder lower plate, the middle of the tool holder upper plate is connected to the top of the support block, and several bolt holes I are provided on the tool holder upper plate. The locking bolts are screwed into the bolt holes I and fix the lathe tool located between the tool holder upper plate and the tool holder lower plate. The ejector pin assembly includes a fixing ring and an ejector pin; the size of the fixing ring is the same as the size of the bearing of the drum shaft, and the fixing ring is provided with an ejector pin bearing; the ejector pin includes a shaft that mates with the ejector pin bearing, one end of the shaft is provided with a cylindrical protrusion, the end face of the drum shaft is provided with a circular groove, the center of the shaft and the protrusion are aligned, the center of the drum shaft and the circular groove are aligned, and the protrusion and the circular groove can engage with each other.

[0005] Furthermore, the base plate is welded to the bearing seat, and the tool holder base is connected to the tool holder mounting plate by bolts.

[0006] Furthermore, an adjusting plate is provided on the outer side of the lower tool post plate. The adjusting plate is perpendicularly connected to the lower tool post plate, and a bolt hole II is provided on the adjusting plate, with a matching adjusting bolt. By adjusting the bolt against the end of the cutting tool, the cutting tool is limited. In conjunction with the clamping plate and other locking bolts, fine-tuning of the cutting tool position can be achieved, thereby obtaining an accurate cutting depth.

[0007] Furthermore, a dial indicator bracket is provided on the side of the upper plate of the tool holder for mounting a dial indicator.

[0008] Furthermore, the outer side of the fixing ring is provided with two handles. The handles facilitate the installation of the fixing ring.

[0009] Compared with existing technologies, this technical solution has the following beneficial effects: 1. This utility model allows for the processing of the drum shaft without disassembling the drum, significantly shortening the maintenance cycle compared to sending it to an external machine for processing or purchasing finished products for maintenance. This not only reduces maintenance and processing costs but also improves maintenance efficiency and operational safety, avoiding additional economic losses caused by prolonged equipment downtime or safety accidents.

[0010] 2. This utility model securely mounts a lathe platform structure consisting of a base plate, a support plate, and a tool post mounting plate onto the bearing seat of the drum shaft. A tool post assembly is mounted on the tool post mounting plate, and the tool can be precisely positioned on the drum shaft for machining through the cooperation of the upper plate, lower plate, and locking bolts. By fixing a fixing ring to the bearing seat of the drum shaft, and then engaging the protrusion of the ejector pin with the groove on the drum shaft, the ejector pin is placed in the fixing ring, thus supporting the drum shaft. This ensures the axial horizontality of both ends of the drum shaft during machining, thereby guaranteeing stable machining operation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the machining lathe used for the hoisting and closing drum shaft of large lifting equipment as described in Embodiment 1.

[0012] Figure 2 This is a schematic diagram of the structure of the small lathe work platform described in Example 1.

[0013] Figure 3 This is a schematic diagram of the tool holder assembly described in Embodiment 1.

[0014] Figure 4 This is a schematic diagram of the ejector pin assembly described in Embodiment 1.

[0015] Figure 5 This is a schematic diagram of the structure of the small lathe work platform described in Example 2.

[0016] Reference numerals: 1-Drum shaft, 2-Bearing seat, 3-Base plate, 4-Support plate, 5-Tool holder mounting plate, 6-Tool holder base, 7-Tool holder upper plate, 8-Tool holder lower plate, 9-Locking bolt, 10-Fixing ring, 11-Shaft, 12-Ejector bearing, 13-Protrusion, 14-Circular groove, 15-Adjusting plate, 16-Adjusting bolt, 17-Dial indicator bracket, 18-Support block, 19-Lathe tool. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments. Specific experimental conditions and methods not specified in the following embodiments are generally conventional methods well known to those skilled in the art.

[0018] Example 1: As shown in the attached document Figures 1-4 As shown, a machining lathe for lifting and closing drum shafts of large lifting equipment includes a small lathe work platform, a tool post assembly, and an ejector pin assembly; The small lathe working platform includes a base plate 3, a support plate 4, and a tool holder mounting plate 5. The base plate 3 is located on one side of the bearing seat 2 of the drum shaft 1, and one end of the base plate 3 is fixedly connected to the bearing seat 2. One end of the support plate 4 is connected to the base plate 3, and the other end is connected to the bottom surface of the tool holder mounting plate 5. The tool holder mounting plate 5 is arranged at an angle and one end of it forms an angle of 30° with the upper surface of the bearing seat 2. The tool holder assembly includes a tool holder base 6, a tool holder upper plate 7, a tool holder lower plate 8, a lathe tool 19, and two locking bolts 9. The tool holder base 6 is connected to the tool holder mounting plate 5, and the tool holder lower plate 8 is connected to the tool holder base 6. A support block 18 is provided in the middle of the tool holder lower plate 8, and the middle of the tool holder upper plate 7 is connected to the top of the support block 18. The tool holder upper plate 7 is provided with several bolt holes I, and the locking bolts 9 are screwed into the bolt holes I to fix the lathe tool 19 located between the tool holder upper plate 7 and the tool holder lower plate 8. The ejector pin assembly includes a fixing ring 10 and an ejector pin; the size of the fixing ring 10 is the same as the size of the bearing of the drum shaft 1, and an ejector pin bearing 12 is provided inside the fixing ring 10; the ejector pin includes a shaft 11 that cooperates with the ejector pin bearing 12, one end of the shaft 11 is provided with a cylindrical protrusion 13, the end face of the drum shaft 111 is provided with a circular groove 14, the centers of the shaft 11 and the protrusion 13 are aligned, the centers of the drum shaft 11 and the circular groove 14 are aligned, and the protrusion 13 and the circular groove 14 can engage with each other; The base plate 3 is welded to the bearing seat 2, and the tool holder base 6 is connected to the tool holder mounting plate 5 by bolts; An adjusting plate 15 is provided on the outer side of the lower plate 8 of the tool holder. The adjusting plate 15 is perpendicularly connected to the lower plate 8 of the tool holder. A bolt hole II is provided on the adjusting plate 15. A matching adjusting bolt 16 is provided in the bolt hole II. The adjusting bolt 16 abuts against the end of the cutting tool 19 to limit the position of the cutting tool 19. When used with the clamping plate and other locking bolts 9, the position of the cutting tool 19 can be finely adjusted to obtain an accurate cutting depth.

[0019] The method of using the machining lathe for the hoisting and closing drum shaft of large lifting equipment described in this embodiment is as follows: In use, first remove the bearing portion at one end of the drum shaft 1 to expose the end of the drum shaft 1. Then, install the base plate 3 on one side of the bearing seat 2 of the drum shaft 1 by bolts or welding. Next, fix the support plate 4 and the tool holder mounting plate 5. Then, take the ejector pin and engage its protrusion 13 with the circular groove 14 of the drum shaft 1. Then, place the shaft 11 of the ejector pin in the ejector pin bearing 12 of the fixing ring 10. Finally, fix the fixing ring 10 on the bearing seat 2 of the drum shaft 1, so that the centers of the fixing ring 10, ejector pin bearing 12, shaft 11, protrusion 13 and circular groove 14 are aligned. Next, the tool holder base 6 is fixed to the tool holder mounting plate 5. The cutting tool 19 is placed between the upper tool holder plate 7 and the lower tool holder plate 8, with one end of the cutting tool 19 positioned at the drum shaft 1 and the other end close to the adjusting plate 15. Two locking bolts 9 are then screwed into bolt hole I and used to secure the cutting tool 19. Simultaneously, adjusting bolt 16 is screwed into bolt hole II of adjusting plate 15 and used to secure the cutting tool 19. The cutting depth of the cutting tool 19 is adjusted by controlling the position of adjusting bolt 16. Finally, the drive motor directly drives the drum shaft 1 to rotate at a uniform speed. While rotating, the cutting tool 19 performs cutting on the drum shaft 1. The tool holder assembly is further reinforced to the small lathe work platform using an electric welding machine to ensure the stability and accuracy of the cutting process. At the same time, the cutting depth and the diameter change of the drum shaft are periodically checked using an outside micrometer and vernier calipers to ensure that the machining process meets the design requirements. During the cutting process, use an angle grinder and sandpaper as needed to clean the burrs and impurities generated during cutting, and keep the working surface clean and flat.

[0020] Example 2: The machining lathe for the hoisting and closing drum shaft of large lifting equipment described in this example differs from the machining lathe described in Example 1 only in that, as Figure 5 As shown, the upper plate 7 of the tool holder is provided with a dial indicator bracket 17 on its side for mounting a dial indicator; the outer side of the fixing ring 10 is provided with two handles, which facilitate the installation of the fixing ring 10.

[0021] This utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A machining lathe for machining the shaft of a hoisting and closing drum of a large lifting equipment, characterized in that: Includes a small lathe work platform, tool post assembly, and ejector pin assembly; The small lathe working platform includes a base plate (3), a support plate (4), and a tool holder mounting plate (5). The base plate (3) is located on one side of the bearing seat (2) of the drum shaft (1), and one end of the base plate (3) is fixedly connected to the bearing seat (2). One end of the support plate (4) is connected to the base plate (3), and the other end is connected to the bottom surface of the tool holder mounting plate (5). The tool holder mounting plate (5) is arranged at an angle and the angle between one end and the upper surface of the bearing seat (2) is 30° to 35°. The tool holder assembly includes a tool holder base (6), a tool holder upper plate (7), a tool holder lower plate (8), a lathe tool (19), and several locking bolts (9). The tool holder base (6) is connected to the tool holder mounting plate (5), and the tool holder lower plate (8) is connected to the tool holder base (6). A support block (18) is provided in the middle of the tool holder lower plate (8), and the middle of the tool holder upper plate (7) is connected to the top of the support block (18). Several bolt holes I are provided on the tool holder upper plate (7), and the locking bolts (9) are screwed into the bolt holes I and fix the lathe tool (19) located between the tool holder upper plate (7) and the tool holder lower plate (8). The ejector assembly includes a fixing ring (10) and an ejector pin; the size of the fixing ring (10) is the same as the size of the bearing of the drum shaft (1), and an ejector pin bearing (12) is provided inside the fixing ring (10); the ejector pin includes a shaft (11) that cooperates with the ejector pin bearing (12), one end of the shaft (11) is provided with a cylindrical protrusion (13), the end face of the drum shaft (1) is provided with a circular groove (14), the center of the shaft (11) and the protrusion (13) are aligned, the center of the drum shaft (1) and the circular groove (14) are aligned, and the protrusion (13) and the circular groove (14) can engage with each other.

2. The machining lathe for the hoisting and closing drum shaft of large lifting equipment according to claim 1, characterized in that: The base plate (3) is welded to the bearing seat (2), and the tool holder base (6) is connected to the tool holder mounting plate (5) by bolts.

3. The machining lathe for the hoisting and closing drum shaft of large lifting equipment according to claim 1, characterized in that: An adjustment plate (15) is provided on the outer side of the lower plate (8) of the tool holder. The adjustment plate (15) is vertically connected to the lower plate (8) of the tool holder. A bolt hole II is provided on the adjustment plate (15), and a matching adjustment bolt (16) is provided in the bolt hole II.

4. The machining lathe for the hoisting and closing drum shaft of large lifting equipment according to claim 1, characterized in that: The upper plate (7) of the tool holder is provided with a dial indicator bracket (17) on its side for mounting a dial indicator.

5. The machining lathe for the hoisting and closing drum shaft of large lifting equipment according to claim 1, characterized in that: The outer side of the fixed ring (10) is provided with two handles.

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