A special tool for horizontal installation of large diameter roller bearing

Abstract

The utility model relates to a special tool for horizontal installation of large-diameter roller bearing, belonging to the technical field of railway diesel locomotive maintenance tool equipment, and the technical scheme is: containing annular air bag (1), fan -shaped inflation cabin (2), air chamber diaphragm (3) and inflation mouth (4), annular air bag (1) is composed of multiple fan -shaped inflation cabin (2), every fan -shaped inflation cabin (2) is connected with an inflation mouth (4), and two fan -shaped inflation cabin (2) are separated with air chamber diaphragm (3) between adjacent two; Every fan -shaped inflation cabin (2) is independent airtight structure, and the outer circle arc radian of full air is matched with bearing inner ring radian, the inner end that inflation mouth (4) is connected with fan -shaped inflation cabin (2) is equipped with air nozzle check piece (5), and the outer end of inflation mouth (4) is equipped with air nozzle plug (6). The utility model has the beneficial effects that: the bearing replacement of high efficiency, fast, safe can be realized, satisfies the fast, accurate alignment demand when horizontal installation, effectively avoids the damage to bearing.

Description

Technical Field

[0001] This utility model relates to a special tool for horizontal installation of large-diameter roller bearings, belonging to the technical field of railway diesel locomotive maintenance tools and equipment. Background Technology

[0002] Large-diameter roller bearings are used in heavy-duty and low-speed applications, typically in large mechanical equipment. These bearings are designed to withstand enormous radial and axial loads and have a long service life.

[0003] Railway diesel locomotive axle box bearings are large-diameter roller bearings. Their main function is to bear the weight of the entire vehicle and various impact forces during operation. Therefore, they require regular disassembly, inspection, flaw detection, and maintenance. Due to the heavy weight of the locomotive axle box wheelsets, the axle box bearings must be installed horizontally. During horizontal installation, the upper half of the roller bearing's rollers 8 will sink under gravity. Although the bearing cage 10 prevents the rollers from falling off, it causes the bore formed by the rollers 8 to become elliptical, resulting in the end face of the roller 8 coinciding with the end face of the bearing's inner ring 11, as shown in the attached diagram. Figure 3 As shown, this prevents the bearing from being installed horizontally.

[0004] Traditional installation tools, such as metal expansion rings or tapered sleeves, have significant drawbacks: firstly, they are not adaptable and require custom-made expansion rings or tapered sleeves for different bearing specifications; secondly, it is difficult to align the upper half of the bearing rollers with the inner ring of the bearing; and thirdly, they are prone to damaging the bearing during operation.

[0005] To solve the above problems and improve locomotive maintenance efficiency, it is urgent to design a special tool for horizontal installation of large-diameter roller bearings. Utility Model Content

[0006] The purpose of this utility model is to provide a special tool for horizontal installation of large-diameter roller bearings, which can realize efficient, fast and safe bearing replacement, meet the requirements of fast and accurate alignment during horizontal installation, effectively avoid damage to the bearing, and solve the problems existing in the background art.

[0007] The technical solution of this utility model is: A special tool for horizontal installation of large-diameter roller bearings includes an annular airbag, a fan-shaped air chamber, an air chamber diaphragm, and an air nozzle. The annular airbag is composed of multiple fan-shaped air chambers, each of which is connected to an air nozzle. Adjacent fan-shaped air chambers are separated by an air chamber diaphragm.

[0008] Each of the sector-shaped air chambers is an independent, sealed structure, and the outer arc of the air-filled chamber matches the arc of the inner ring of the bearing.

[0009] The inner end of the air nozzle connected to the fan-shaped air chamber is provided with an air nozzle check plate, and the outer end of the air nozzle is provided with an air nozzle plug.

[0010] The diameter of the valve check plate matches the diameter of the inflation nozzle, and the valve check plate is connected to the port of the inflation nozzle via a ring handle.

[0011] The air plug at the outer end of the air inlet is conical.

[0012] The beneficial effects of this utility model are: it can effectively replace the original metal expansion ring or conical sleeve type special tools. By inflating a transparent annular air bladder, it lifts the bearing rollers, allowing for direct observation and alignment, and rapid and efficient bearing installation, thus meeting the installation requirements of different types of roller bearings. Its transparent and observable alignment during installation enhances operational flexibility and safety, representing a practical improvement in locomotive maintenance. This device is adaptable to bearings in various vehicle models, and bearing replacement is quick and safe. Its multi-compartment structure allows for a wide range of diameter adjustment, making operation convenient and reliable, reducing labor intensity while improving maintenance efficiency. Attached Figure Description

[0013] Figure 1 This is the front view of the present utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram illustrating the installation and use of this utility model; Figure 4 This is a schematic diagram of the bearing structure adapted to this utility model; In the diagram: 1. Annular airbag; 2. Fan-shaped inflatable chamber; 3. Inflatable chamber diaphragm; 4. Inflatable nozzle; 5. Nozzle check plate; 6. Nozzle plug; 7. Bearing outer ring; 8. Bearing roller; 9. Bearing inner ring outline; 10. Bearing roller cage; 11. Bearing inner ring. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] See attached document Figure 1-4 A special tool for horizontal installation of large-diameter roller bearings includes an annular airbag 1, a fan-shaped air chamber 2, an air chamber diaphragm 3, and an air nozzle 4. The annular airbag 1 is composed of multiple fan-shaped air chambers 2, each of which is connected to an air nozzle 4. Adjacent fan-shaped air chambers 2 are separated by an air chamber diaphragm 3.

[0016] In this embodiment, refer to the appendix Figure 1-4 The tool consists of an annular airbag 1, a fan-shaped inflation chamber, an air chamber diaphragm 3, an inflation nozzle 4, an air nozzle check plate 5, and an air nozzle plug 6, wherein: The annular airbag 1 is made of a transparent plastic material with excellent toughness. It consists of multiple fan-shaped inflatable chambers 2. Each fan-shaped inflatable chamber 2 is inlaid with an inflation nozzle 4. The end faces of adjacent fan-shaped inflatable chambers 2 are separated by a common air chamber diaphragm 3.

[0017] Each sector-shaped air chamber 2 is in an independent and sealed state. The outer arc of the air-filled chamber is close to the arc of the inner ring of the bearing. The side of the sector-shaped air chamber 2 is equipped with an air nozzle 4, which can realize the functions of inflation, pressure holding and degassing as needed. The air chamber diaphragm 3 divides the annular airbag body 1 into several fan-shaped inflatable chambers 2, which can be used in combination with variable diameter, increasing the adaptability range of the tool to large diameter changes. The inflation nozzle 4 consists of an air valve check piece 5 at the inner end of the tubular body and an air valve plug 6 at the outer end. Its main function is to inflate or deflate the fan-shaped inflation chamber 2 through the inflation nozzle 4. The air valve check piece 5 prevents backflow of inflation air. The air valve check piece 5 has a ring handle connected to the inner port of the inflation nozzle 4. It is circular and relies on the elasticity of the ring handle to cover the inner port of the inflation nozzle 4. After being filled with air, the air valve plug 6 further seals and maintains pressure. When deflation, the check piece 5 can be opened. The annular airbag 1 is composed of multiple transparent fan-shaped inflatable chambers 2 that can be combined to increase the adaptability to changes in bearing diameter. The transparency allows for easy and timely adjustment of the up, down, left, and right positions, resulting in higher alignment efficiency. The compartmentalized structure design has the advantage that leakage in individual chambers will not result in the loss of all functions.

[0018] The working process of this utility model is as follows: Comparison Appendix Figure 1-4 As shown, during use, first install the bearing inner ring 11 on the axle head according to the process requirements, then install the bearing outer ring 7 together with the bearing rollers 8 and the bearing roller cage 10 into the axle box. At this time, place the annular air bag 1 into the bearing to be installed, and inflate each sector-shaped air chamber 2 through the air inlet 4 according to the bearing diameter. Under the expansion of the annular air bag 1, when all the bearing rollers 8 are close to the raceway of the bearing outer ring 7, tighten the air plug 6 on the air inlet 4. Then lift the axle box and observe the bearing inner ring contour line 9 through the transparent annular air bag 1 to adjust and align the bearing inner ring 11 before slowly pushing it in to complete the purpose of quick installation.

[0019] This invention is used in scenarios involving the horizontal installation of large-diameter roller bearings, achieving safe, fast, and precise installation. It ensures the accuracy and stability of bearing replacement operations. Its design fully considers ease of operation, enabling operators to quickly and safely complete maintenance and replacement tasks, further guaranteeing the safety and smooth operation of railway transportation.

[0020] An embodiment of this utility model is as follows: The maximum diameter of the circular airbag 1 after being fully inflated is approximately 230 mm. The diameter of the fan-shaped inflatable chamber 2 after being fully inflated is approximately 60mm. The air chamber diaphragm 3 has a diameter of 60mm and six evenly distributed diaphragms; The inflation nozzle 4 has a diameter of 10mm, and there is one on each of the fan-shaped inflation chambers 2; The air valve check plate 5 has a ring handle connected to the inner port of the air valve 4. It is circular with a diameter of 13mm. The elasticity of the ring handle allows it to cover the inner port of the air valve 4. The air plug 6 has a ring handle connected to the outer port of the air nozzle 4. It is conical, with the small end of the cone smaller than the inner diameter of the air nozzle 4 and the large end larger than the inner diameter of the air nozzle 4.

Claims

1. A special tool for horizontal installation of large-diameter roller bearings, characterized in that: It includes an annular airbag (1), a fan-shaped inflatable chamber (2), an air chamber diaphragm (3) and an inflation nozzle (4). The annular airbag (1) is composed of multiple fan-shaped inflatable chambers (2), each fan-shaped inflatable chamber (2) is connected to an inflation nozzle (4), and adjacent fan-shaped inflatable chambers (2) are separated by an air chamber diaphragm (3).

2. The special tool for horizontal installation of large-diameter roller bearings according to claim 1, characterized in that: Each of the sector-shaped air chambers (2) is an independent sealed structure, and the outer arc of the air-filled chamber matches the arc of the inner ring of the bearing.

3. The special tool for horizontal installation of large-diameter roller bearings according to claim 1, characterized in that: The inner end of the air nozzle (4) connected to the fan-shaped air chamber (2) is provided with an air nozzle check plate (5), and the outer end of the air nozzle (4) is provided with an air nozzle plug (6).

4. The special tool for horizontal installation of large-diameter roller bearings according to claim 3, characterized in that: The diameter of the air valve check plate (5) matches the diameter of the air inlet (4), and the air valve check plate (5) is connected to the port of the air inlet (4) through a ring handle.

5. A special tool for horizontal installation of large-diameter roller bearings according to claim 3, characterized in that: The air plug (6) at the outer end of the air inlet (4) is conical.

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