Lifting device for replacing driving shaft of mining electric shovel

Abstract

The utility model relates to a dismounting tool, in particular to a mining electric shovel driving shaft replacement lifting device which comprises a workbench with a lifting mechanism installed at the bottom, the workbench comprises a workbench base and a dismounting mechanism installed on the workbench base, and the dismounting mechanism comprises a propelling device, an adjusting device and a dismounting head which are sequentially arranged from bottom to top; the adjusting device comprises a direction adjusting seat and a rotary adjusting seat, the direction adjusting seat comprises an outer frame and an inner frame, the outer frame and the inner frame are both square frames, hinge structures are arranged on the four edges of the outer frame, the hinge structures on the two corresponding edges are hinged to the workbench, and the hinge structures on the two corresponding edges are hinged to the inner frame; the outer frame and the inner frame are both matched with fine adjustment driving mechanisms. The device is high in automation degree, can realize accurate adjustment at multiple degrees of freedom, and greatly saves manpower and time cost.

Description

Technical Field

[0001] This utility model relates to a disassembly tool, and more particularly to a lifting device for replacing the drive shaft of a mining electric shovel. Background Technology

[0002] Currently, the P&H4100 electric shovel holds the largest market share in open-pit mines. Its drive shaft weighs over 1.7 tons and its main function is to drive the shovel's main body in rotation. It bears significant loads during operation and generally requires annual maintenance and replacement. The current disassembly and assembly method primarily involves manual labor supplemented by machining. Because the drive shaft is located below the shovel's center plate, operating space is limited. Operators, loaders, and equipment piping are all in the same area, leading to overlapping personnel movement and equipment operation. Therefore, disassembly and assembly require at least three personnel.

[0003] The disassembly and assembly of the drive shaft follows a top-to-bottom disassembly and bottom-to-top installation procedure. Furthermore, because the drive shaft itself uses double-row radial spherical bearings, if the installation angle is tilted during installation, the bearing housing will shift, causing it to tilt and press against the bearing seat, making installation difficult. In addition, some electric shovels are older, and the installation fit has changed. Therefore, disassembly and assembly require a large amount of manpower and heavy disassembly tools, which is time-consuming, labor-intensive, and poses a significant danger. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a lifting device for replacing the drive shaft of a mining electric shovel.

[0005] The technical solution adopted by this utility model is: a mining electric shovel drive shaft replacement lifting device, including a workbench with a lifting mechanism installed at the bottom, the workbench including a workbench base and a disassembly and assembly mechanism installed on the workbench base, the disassembly and assembly mechanism including a pushing device, an adjusting device and a disassembly head arranged sequentially from bottom to top;

[0006] The adjustment device includes a direction adjustment seat and a rotation adjustment seat. The direction adjustment seat includes an outer frame and an inner frame. Both the outer frame and the inner frame are square frames. The outer frame has hinge structures on all four sides. Two corresponding side hinge structures are hinged to the worktable, and two corresponding side hinge structures are hinged to the inner frame. Both the outer frame and the inner frame are matched with a fine-tuning drive mechanism.

[0007] Furthermore, the track system is connected to the chassis frame via a walking connector. The chassis frame is equipped with a corresponding lifting rail, and a lifting slider is installed on the lifting rail. The walking connector is fixedly connected to the corresponding lifting slider. A lifting cylinder is installed inside the lifting slider. The cylinder barrel of the lifting cylinder is placed inside the lifting slider and fixed to the lifting slider. The piston rod of the lifting cylinder extends upward and abuts against the top beam of the chassis frame.

[0008] Furthermore, two transverse slide rails are installed on the top of the workbench base. A first adjusting mounting plate is mounted on each of the transverse slide rails via a slider. A transverse hydraulic cylinder is installed on the workbench base, with its cylinder barrel fixed to the workbench base frame and its piston rod fixed to the bottom of the first adjusting mounting plate. Two longitudinal slide rails are installed on the top of the first adjusting mounting plate, with a second adjusting mounting plate mounted on each of the longitudinal slide rails via a slider. A longitudinal hydraulic cylinder is installed on the first adjusting mounting plate, with its cylinder barrel fixed to the bottom of the first adjusting mounting plate and its piston rod fixed to the bottom of the second adjusting mounting plate.

[0009] Furthermore, the propulsion device includes a motor reducer with an output shaft, a drive shaft, a worm gear mechanism, a lead screw, and a guide post. Worm gear mechanisms are respectively installed on both sides of the motor reducer. The drive shaft connects the output end of the motor reducer to the input end of the worm gear mechanism, and the bottom of the longitudinally positioned lead screw is connected to the output end of the worm gear mechanism.

[0010] Furthermore, a third adjustment mounting plate is provided above the second adjustment mounting plate. The third adjustment mounting plate is provided with screw holes corresponding to the lead screw. The third adjustment mounting plate is driven to move forward and retract by driving the lead screw. The direction adjustment seat, the rotation adjustment seat, and the disassembly head are provided on the third adjustment mounting plate.

[0011] Furthermore, a disassembly rod is installed at the top of the lead screw, and the lower end face of the disassembly rod has a screw hole corresponding to the lead screw.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model adopts a lifting track chassis. The tracks have strong grip and stable movement. The lifting of the tracks is achieved by the extension and retraction of 4 hydraulic cylinders. When working, the tracks are raised and the chassis contacts the ground to bear the force as a whole, making the chassis more stable during operation.

[0014] 2. This utility model is equipped with a scissor fork lifting mechanism and a screw lifting mechanism, which greatly increases the lifting height of the equipment;

[0015] 3. This utility model can be adjusted in 8 degrees of freedom, which greatly increases the installation accuracy;

[0016] 4. This utility model achieves a high degree of automation and can be operated by a single person. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a two-dimensional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the chassis frame structure of this utility model;

[0020] Figure 4This is a schematic diagram of the installation structure of the first and second adjustment mounting plates of this utility model;

[0021] Figure 5 View 1 of the mounting structure of the direction adjustment seat and rotation adjustment seat of this utility model;

[0022] Figure 6 View 2 of the mounting structure for the direction adjustment seat and rotation adjustment seat of this utility model.

[0023] In the diagram: 1-Chassis frame, 2-Crawler system, 3-Workbench base, 4-First adjustment mounting plate, 5-Second adjustment mounting plate, 6-Third adjustment mounting plate.

[0024] 11-Lifting slide rail, 12-Lifting slider, 13-Lifting cylinder, 14-Scissor lift,

[0025] 21-Travel connector,

[0026] 31-Transverse slide rail, 32-Transverse hydraulic cylinder, 33-Longitudinal slide rail, 34-Longitudinal hydraulic cylinder

[0027] 51-Motor reducer, 52-Drive shaft, 53-Worm gear mechanism, 54-Screw, 55-Guide post, 56-Disassembly push rod.

[0028] 61-Direction adjustment seat, 611-Outer frame, 612-Inner frame

[0029] 62-Rotary adjusting seat, 63-External hinge, 64-External fine-tuning cylinder, 65-Internal fine-tuning cylinder

[0030] 7. Remove the head. Detailed Implementation

[0031] like Figure 1-6 As shown, a mining electric shovel drive shaft replacement and lifting device includes a chassis frame 1. Track systems 2 are symmetrically arranged on both sides of the chassis frame 1. Each track system 2 is connected to the chassis frame 1 via two walking connectors 21. The chassis frame 1 is equipped with four sets of lifting slide rails 11, each with a lifting slider 12. Each walking connector 21 is fixedly connected to its corresponding lifting slider 12. A lifting cylinder 13 is installed inside the lifting slider 12, with its cylinder barrel placed inside and fixed to it. The piston rod of the lifting cylinder 13 extends upwards and eventually abuts against the top beam above it. By controlling the extension amount of the piston rod of the lifting cylinder 13, the relative height between the chassis frame 1 and the track system 2 can be controlled.

[0032] The chassis frame 1 is also equipped with a lifting mechanism. In this embodiment, the lifting mechanism is a scissor lift 14. The chassis frame 1 is provided with four hinged mounting positions to fix the bottom of the scissor lift 14. The top of the scissor lift 14 is connected to the workbench base 3. The workbench base 3 is a frame structure, and the bottom is provided with four hinged mounting positions to connect with the top of the scissor lift 14.

[0033] Two transverse slide rails 31 are mounted on the top of the workbench base 3. A first adjusting mounting plate 4 is mounted on the transverse slide rails 31 via sliders. A transverse hydraulic cylinder 32 is mounted on the workbench base 3. The cylinder barrel of the transverse hydraulic cylinder 32 is fixed to the frame of the workbench base 3, and the piston rod is fixed to the bottom of the first adjusting mounting plate 4. Two longitudinal slide rails 33 are mounted on the top of the first adjusting mounting plate 4. A second adjusting mounting plate 5 is mounted on the longitudinal slide rails 33 via sliders. A longitudinal hydraulic cylinder 34 is mounted on the first adjusting mounting plate 4. The cylinder barrel of the longitudinal hydraulic cylinder 34 is fixed to the bottom of the first adjusting mounting plate 4, and the piston rod is fixed to the bottom of the second adjusting mounting plate 5.

[0034] The second adjusting mounting plate 5 is equipped with a propulsion device, including a dual-output shaft motor reducer 51, a drive shaft 52, a worm gear mechanism 53, a lead screw 54, and guide posts 55. Worm gear mechanisms 53 are respectively installed on both sides of the motor reducer 51. The drive shaft 52 connects the output end of the motor reducer 51 to the input end of the worm gear mechanism 53. The bottom of the longitudinally arranged lead screw 54 is connected to the output end of the worm gear mechanism 53. A guide post 55 is installed at each of the four corners of the second adjusting mounting plate 5.

[0035] A third adjustment mounting plate 6 is provided above the second adjustment mounting plate 5. The third adjustment mounting plate 6 has screw holes corresponding to the lead screw 54 and through holes corresponding to the guide post 55. The third adjustment mounting plate 6 is driven to advance and retract by the lead screw 54. A direction adjustment seat 61 is provided on the upper end face of the third adjustment mounting plate 6. The direction adjustment seat 61 includes an outer frame 611 and an inner frame 612. Both the outer frame 611 and the inner frame 612 are square frames. The outer frame 611 has hinge structures on all four sides. The outer frame 611 is mounted on the third adjustment mounting plate 6. Two opposite sides are respectively provided with external hinge members 63 for mounting the outer frame 611. The external hinge members 63 are hinged to allow the outer frame 611 to rotate and be finely adjusted in the front-back direction in the figure. The hinge structures on the other two opposite sides of the outer frame 611 are used to hinge and mount the inner frame 612, allowing the inner frame 612 to rotate and be finely adjusted in the left-right direction relative to the outer frame 611 in the figure. The outer frame 611 is fitted with an outer fine-tuning cylinder 64. The cylinder barrel of the outer fine-tuning cylinder 64 is hinged to the third adjusting mounting plate 6 via a connecting piece, and the piston rod is hinged to the outer frame 611 via a connecting piece, thereby enabling the outer frame 611 to rotate and adjust in the front-to-back direction as shown in the figure. The inner frame 612 is fitted with an inner fine-tuning cylinder 65. The cylinder barrel of the inner fine-tuning cylinder 65 is hinged to the outer frame 611 via a connecting piece, and the piston rod is hinged to the inner frame 612 via a connecting piece, thereby enabling the inner frame to rotate and adjust in the left-to-right direction as shown in the figure.

[0036] A rotary adjustment seat 62 is installed on the upper end face of the inner frame 612. In this embodiment, the rotary adjustment seat 62 is a worm gear rotary platform. Its bottom is fixedly connected to the upper end face of the inner frame 612, and the upper rotating part is equipped with a disassembly head 7.

[0037] Furthermore, a disassembly rod 56 is installed on the top of the lead screw 54, and the lower end face of the disassembly rod 56 has a screw hole corresponding to the lead screw 54. An electro-hydraulic workstation is installed on the first adjusting mounting plate 4 to provide power and hydraulic output, and a railing is provided to facilitate the worker's standing during operation.

[0038] When the device is in use, with the piston rod of the lifting cylinder 13 extended sufficiently, the bottom surface of the chassis frame 1 is higher than the bottom surface of the track system 2. The track system drives the entire device to move to a suitable area below the shovel's rotating shaft. Once in position, the piston rod of the lifting cylinder 13 retracts until the chassis frame 1 contacts the ground, increasing the device's stability. The disassembly head 7 is lifted to the mounting hole position and pushed into it via the scissor lift 14, lead screw 54, lateral cylinder 32, and longitudinal cylinder 34. During this process, the lateral cylinder 32, longitudinal cylinder 34, outer fine-tuning cylinder 64, and inner fine-tuning cylinder 65 continuously make fine adjustments according to the orientation of the mounting hole. Simultaneously, the teeth of the disassembly head 7 are aligned with the teeth inside the mounting hole by rotating the adjusting seat 62, ensuring the disassembly head is fully pushed into the mounting hole in the correct direction. Then, the flange on the disassembly head 7 is bolted to the shovel's rotating shaft. Finally, the scissor lift 14 is driven down to pull out the shovel's rotating shaft. If the device cannot pull out the rotary shaft by its own weight, the disassembly rod 56 needs to be installed on the top of the lead screw 54, and the top of the disassembly rod 56 is pressed against the bottom of the electric shovel's central plate through a threaded connection. Then, the scissor lift 14 is used to pull out the rotary shaft.

Claims

1. A lifting device for changing the drive shaft of a mining electric shovel, characterized in that: The device includes a worktable with a lifting mechanism installed at the bottom. The worktable includes a worktable base and a disassembly and assembly mechanism installed on the worktable base. The disassembly and assembly mechanism includes a pushing device, an adjusting device, and a disassembly head arranged sequentially from bottom to top. The adjustment device includes a direction adjustment seat (61) and a rotation adjustment seat (62). The direction adjustment seat (61) includes an outer frame (611) and an inner frame (612). Both the outer frame (611) and the inner frame (612) are square frames. The outer frame (611) has hinge structures on all four sides. The two corresponding side hinge structures are hinged to the worktable, and the two corresponding side hinge structures are hinged to the inner frame (612). Both the outer frame (611) and the inner frame (612) are matched with fine-tuning drive mechanisms.

2. The mining electric shovel drive shaft replacement lifting device according to claim 1, characterized in that: The track system (2) is connected to the chassis frame (1) via the walking connector (21). The chassis frame (1) is provided with a lifting slide rail (11), and a lifting slider (12) is provided on the lifting slide rail. The walking connector (21) is fixedly connected to the corresponding lifting slider (12). A lifting cylinder (13) is provided inside the lifting slider (12). The cylinder of the lifting cylinder (13) is placed inside the lifting slider (12) and fixed to the lifting slider (12). The piston rod of the lifting cylinder (13) extends upward and abuts against the top beam of the chassis frame (1).

3. The mining electric shovel drive shaft replacement lifting device according to claim 1, characterized in that: The top of the workbench base is equipped with two transverse slide rails (31). The transverse slide rails (31) are equipped with a first adjustment mounting plate (4) via a slider. The workbench base (3) is equipped with a transverse hydraulic cylinder (32). The cylinder barrel of the transverse hydraulic cylinder (32) is fixed to the frame of the workbench base (3), and the piston rod is fixed to the bottom of the first adjustment mounting plate (4). The top of the first adjustment mounting plate (4) is equipped with two longitudinal slide rails (33). The longitudinal slide rails (33) are connected to the second adjustment mounting plate (5) via a slider. The first adjustment mounting plate (4) is equipped with a longitudinal oil cylinder (34). The cylinder barrel of the longitudinal oil cylinder (34) is fixed to the bottom of the first adjustment mounting plate (4), and the piston rod is fixed to the bottom of the second adjustment mounting plate (5).

4. The mining electric shovel drive shaft replacement lifting device according to claim 3, characterized in that: The propulsion device includes a motor reducer (51) with an output shaft, a transmission shaft (52), a worm gear mechanism (53), a lead screw (54), and a guide column (55). The motor reducer (51) is provided with worm gear mechanisms (53) on both sides. The transmission shaft (52) connects the output end of the motor reducer (51) and the input end of the worm gear mechanism (53). The bottom of the longitudinally arranged lead screw (54) is connected to the output end of the worm gear mechanism (53).

5. A mining electric shovel drive shaft replacement lifting device according to claim 4, characterized in that: A third adjustment mounting plate (6) is provided above the second adjustment mounting plate (5). The third adjustment mounting plate (6) is provided with screw holes corresponding to the lead screw (54). The third adjustment mounting plate (6) is driven to move forward and retract by driving the lead screw (54). The direction adjustment seat (61), the rotation adjustment seat (62), and the disassembly head are provided on the third adjustment mounting plate (6).

6. The mining electric shovel drive shaft replacement lifting device according to claim 4, characterized in that: A disassembly rod (56) is installed on the top of the lead screw (54), and a screw hole corresponding to the lead screw (54) is opened on the lower end face of the disassembly rod (56).

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