Bearing pulling-out device of electric shovel lifting reduction gearbox

Abstract

The utility model discloses a bearing pulling-out device of an electric shovel lifting reduction gearbox, belongs to the technical field of maintenance of mine excavating equipment, and solves the problems that a first-shaft bearing of an existing electric shovel lifting reduction gearbox is difficult to disassemble and cannot be conveniently disassembled. A plurality of round holes, a plurality of installation holes and a shaft hole are formed in the disc, the shaft hole is located in the center of the disc, the installation holes are formed outside the shaft hole, the round holes are formed along the circumference of the disc, a plurality of pins are installed on the installation plate, the positions and the number of the pins correspond to those of the round holes, and the pins are inserted into the round holes in a one-to-one correspondence mode. The device is simple in structure, the bearing can be disassembled without a gas cutting method in the detection process, smoke dust is avoided, and the device has extremely high generalization performance.

Description

Technical Field

[0001] This utility model belongs to the field of maintenance technology for mining excavation equipment, specifically relating to a bearing removal device for an electric shovel lifting gearbox. Background Technology

[0002] Electric shovels are domestically produced open-pit mining equipment. Currently, the commonly known electric shovel push shaft shaft end clamping device uses two semi-circular shaft end clamps connected and fixed to the shaft end of the push shaft.

[0003] For mining companies, electric shovels are indispensable excavation equipment. The lifting mechanism of an electric shovel primarily consists of a lifting motor acting on the first shaft (small herringbone gear shaft) of the lifting gearbox, which then decelerates through the second shaft (large herringbone gear and shaft) before acting on the lifting drum. This pulls the lifting rope, driving the bucket and shovel arm to achieve digging and lifting. However, the bearings on the first shaft of the lifting gearbox often fail due to long-term use and wear. Replacement has traditionally been done by oxy-fuel cutting, which burns oil and grease inside the gearbox and bearings during cutting, producing smoke and dust with an unpleasant odor that seriously affects the health of maintenance workers. Furthermore, the difficulty of disassembly results in slow maintenance speed, high labor intensity, and a lack of convenience and speed. Utility Model Content

[0004] This utility model provides a bearing removal device for an electric shovel lifting gearbox, which solves the problem of difficult and inconvenient disassembly of the first shaft bearing of the existing electric shovel lifting gearbox.

[0005] The technical solution of this utility model is: a bearing removal device for an electric shovel lifting gearbox, comprising a disc and a mounting plate. The disc is provided with multiple circular holes, multiple mounting holes and shaft holes. The shaft holes are located at the center of the disc. Multiple mounting holes are provided along the outside of the shaft holes. The circular holes are arranged along the circumference of the disc. Multiple pins are installed on the mounting plate. The position and number of the pins and the circular holes correspond to each other. The pins are inserted into the circular holes one by one.

[0006] As a further improvement of this utility model, the mounting hole is an elliptical hole, which facilitates the positioning of the disc and the bearing and makes disassembly easier.

[0007] As a further improvement of this utility model, two discs are provided, and the two discs are respectively connected to the outer side and the inner side of the shaft of the electric shovel reducer.

[0008] The beneficial effects of this utility model are as follows: This utility model connects a disc to one shaft of the electric shovel reducer, relying on bolts and mounting holes on the reducer for positioning and connection. It then uses round holes and pins on the disc for connection. By using a mounting plate to disassemble the bearing of the electric shovel reducer, the one shaft of the reducer can be directly disassembled, eliminating the need for gas cutting. No smoke or dust is generated during maintenance, reducing harm to workers' health. This utility model has a simple structure, eliminates the need for gas cutting to disassemble the bearing during inspection, avoids smoke and dust generation, and has strong applicability. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0010] Figure 2 This is a schematic diagram of the disc structure of this utility model;

[0011] Figure 3 This is a schematic diagram of the mounting plate structure of this utility model;

[0012] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0013] In the diagram: 1-disc; 2-pin; 3-round hole; 4-mounting hole; 5-mounting plate; 6-shaft hole. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Example 1:

[0016] like Figure 1-3 As shown, a bearing removal device for an electric shovel lifting gearbox includes a disc 1 and a mounting plate 5. The disc 1 is provided with multiple circular holes 3, multiple mounting holes 4 and shaft holes 6. The shaft holes 6 are located at the center of the disc 1, and multiple mounting holes 4 are provided around the shaft holes 6. The circular holes 3 are arranged around the circumference of the disc 1. Multiple pins 2 are installed on the mounting plate 5. The position and number of the pins 2 and the circular holes 3 correspond to each other, and the pins 2 are inserted into the circular holes 3 one by one.

[0017] Mounting hole 4 is an elliptical hole. The bolt is installed and positioned through mounting hole 4. The elliptical hole makes it easy to install the bolt.

[0018] There are two discs 1, and the two discs 1 are respectively connected to the outer side and the inner side of the shaft of the electric shovel reducer.

[0019] In use, place the disc 1 at the bearing housing, pass the bearing through the shaft hole 6, first align it with a crosshair, then align it through the mounting hole 4 on the outside of the disc 1, mark it, and weld the high-strength bolt to the bearing outer sleeve according to the marks. The high-strength bolt should be perpendicular to the end face of the bearing outer sleeve. First assemble the pin 2 with the mounting plate 5, then pass the pin 2 through the round hole 3 to connect the disc 1 and the pin 2 together. Insert a 6mm diameter cotter pin into the end of the pin 2 to prevent it from coming out. At this time, the high-strength bolt can just pass through the mounting hole 4 on the outside of the disc 1. Tighten the high-strength nut evenly through the mounting hole 4, and slowly pull the bearing out of the housing. After the bearing has moved a certain distance, the pin 2 can be replaced with an extended pin to create a certain distance between the bearing and the disc 1. Tighten the high-strength nut evenly again, and pull out the roller balls in the bearing skeleton one by one from the mounting notch. After removing the bearing skeleton, the bearing inner sleeve can be removed. When removing the inner sleeve, the high-strength bolts can increase the amount of welding. The inner sleeve expands after absorbing the heat of the electric arc, making it easier to pull out, until finally the outer sleeve of the bearing is completely pulled out.

[0020] Example 2:

[0021] like Figure 4 As shown, this utility model can also be used without the mounting plate 5. The pin 2 can be directly connected to the disc 1 through the round hole 3. By using the pin 2 to press against the screw on the bearing cover, the first shaft of the electric shovel reducer bearing can be disassembled. At this time, the shaft hole 6 of the disc 1 is passed through the bearing, and then it can be aligned with the outer sleeve of the lifting shaft bearing through the mounting hole 4. The outer sleeve of the bearing is welded to the bearing housing with high-strength bolts, which pass through the elongated hole on the outer ring of the disc. The disc connection is then tightened with a nut. The pin 2 is supported in the bearing cover area outside the bearing canal, allowing the bearing cover to be disassembled.

Claims

1. A bearing removal device for an electric shovel lifting gearbox, characterized in that: Includes a disc (1) and a mounting plate (5). The disc (1) is provided with multiple round holes (3), multiple mounting holes (4) and shaft holes (6). The shaft holes (6) are located at the center of the disc (1). Multiple mounting holes (4) are provided along the outside of the shaft holes (6). The round holes (3) are arranged along the circumference of the disc (1). Multiple pins (2) are installed on the mounting plate (5). The position and number of the pins (2) and the round holes (3) correspond to each other. The pins (2) are inserted into the round holes (3) one by one.

2. The bearing removal device for an electric shovel lifting gearbox according to claim 1, characterized in that: The mounting hole (4) is an elliptical hole.

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