A bearing puller

Abstract

This utility model relates to the field of bearing disassembly technology, and in particular to a bearing disassembly tool, including a back plate, columns, connecting beams, support sleeves, hydraulic jacks, a base plate, and a pad. The back plate is located at one end of the base plate. Columns are arranged laterally on both sides of the back plate at a distance from the base plate. The columns and the back plate are connected by a connecting beam. A hydraulic jack is located on one side of the back plate between the back plate and the columns, and a support sleeve is located on one side of the columns. The tail end of the hydraulic jack rests against the surface of the back plate, and the outer surfaces of the support sleeve on both sides rest against the surfaces of the columns. A bearing hole is located in the center of the support sleeve, and bolt through holes are provided around the outer circumference of the bearing hole. The advantages of this utility model are: no heating required, no space limitations, no damage to the bearing, low disassembly cost, and good disassembly effect.

Description

Technical Field

[0001] This utility model relates to the field of bearing disassembly technology, and in particular to a bearing disassembly tool. Background Technology

[0002] Roller rollers in heavy machinery or large equipment require rolling bearings on both sides to withstand extremely high radial or axial loads while accommodating low or medium speed rotation. During the rotation of heavy equipment, these bearings bear extremely high loads and require periodic disassembly, inspection, and replacement.

[0003] There are many existing tools and methods for disassembling bearings, but most are a combination of heating and a bearing puller. While this combination is convenient for disassembling small bearings, its disassembly capability decreases for bearings with a diameter exceeding 200 mm. When space is limited and heating is not an option, destructive disassembly is often the only choice, resulting in bearing waste. Furthermore, while flame heating reduces the interference fit between the bearing and shaft, thus decreasing friction, this method suffers from uneven heating, leaving residual thermal stress after cooling. The flame temperature is also difficult to control; excessively high temperatures can cause annealing of the bearing outer ring and rolling elements, affecting bearing life. Improper flame heating can lead to similar thermal deformation on the bearing and shaft surfaces, making disassembly impossible. Flame heating also requires a long time, necessitating large amounts of oxygen and combustible gas, increasing costs. It can also easily cause scratches or grooves on the shaft surface and bearing inner bore, damaging the bearing and rendering it unusable. Overall, the disassembly cost is high, and the results are poor. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a bearing disassembly tool. It employs a hydraulic jack and a support sleeve between a back plate and a column. The hydraulic jack pushes the end of the roller shaft, and the bearing hole of the support sleeve fixes the bearing on the shaft. Through the pushing of the jack and the limiting of the support sleeve, the bearing on the roller is disassembled without heating. The disassembly work is not limited by space, does not damage the bearing, has low disassembly cost, and has good disassembly effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bearing disassembly tool includes a back plate, columns, connecting beams, support sleeves, hydraulic jacks, a through cover, a base plate, and a pad. The back plate is located at one end of the base plate. Columns are arranged on both sides of the back plate at intervals. The columns and the back plate are connected by a connecting beam. A hydraulic jack is located on one side of the back plate between the back plate and the columns. A support sleeve is located on one side of the columns. The tail end of the hydraulic jack rests against the surface of the back plate. The outer surfaces of the support sleeve on both sides rest against the inner surfaces of the columns. A bearing hole is located at the center of the support sleeve. Bolt through holes are located on the outer circumference of the support sleeve around the bearing hole. The support sleeve is bolted to the through cover. A pad is located on the upper surface of the base plate.

[0007] Furthermore, the bearing hole diameter of the support sleeve is consistent with the inner diameter of the bearing housing of the bearing to be replaced.

[0008] Furthermore, the transparent cover is disposed on the outer surface of the support sleeve on the side away from the hydraulic jack.

[0009] Furthermore, a rubber pad layer is provided on the upper surface of the pad plate.

[0010] Furthermore, the bearing disassembly tool also includes an extension rod, which is positioned at the top of the hydraulic jack's push rod when the bearing is pushed.

[0011] Furthermore, the center line of the bearing hole of the support sleeve coincides with the center line of the hydraulic jack.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) Simple structure, economical and practical, easy and flexible installation and disassembly, suitable for long shafts with diameters of 300 or more and heavy loads, protective disassembly, low bearing damage, and extended bearing service life.

[0014] 2) No flame heating is required, there is no residual stress, the bearing has a long service life, there is no consumption of hydraulic oil, combustible gas and combustion-supporting gas, the disassembly cost is low, the bearing disassembly effect is good, the bearing can be reused, and the bearing utilization rate is high.

[0015] 3) It has a compact structure, is not limited by the space required for bearing disassembly, is highly practical, and has a wide range of applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the bearing disassembly tool described in this utility model.

[0017] In the diagram: 1. Back plate; 2. Hydraulic jack; 3. Support sleeve; 4. Connecting beam; 5. Column; 6. Base plate; 7. Pad plate; 8. Bearing; 9. Roller body; 11. Support plate; 31. Bolt through hole; 32. Baffle. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0019] like Figure 1 As shown, the working principle of a bearing disassembly tool is as follows: A back plate 1 and a column 5 are set on one side of the base plate 6, with a distance between the back plate 1 and the column 5. A hydraulic jack 2 and a support sleeve 3 are set between the back plate 1 and the column 5. The hydraulic jack 2 rests against the back plate 1, and the support sleeve 3 rests against the surface of the column 5. The roller body 9 is set on the base plate and supported by a pad 7. The shaft head for installing the bearing 8 is set between the column 5 and the back plate 1. The bearing 8 is set in the bearing hole of the support sleeve 3. A bearing cover is installed on the side of the support sleeve 3 facing the roller body 9. The bearing cover is fixed by bolt through holes 31. The bearing cover contacts the outer ring of the bearing 8, restricting the bearing 8 from moving axially with the roller body 9 during the pushing process. The jack rod of the hydraulic jack 2 rests against the end of the shaft head of the roller body 9. The bearing is fixed by the support sleeve 3. The column 5 limits the support sleeve 3. The pushing of the hydraulic jack 2 disassembles and separates the bearing 8 from the shaft head of the roller body 9.

[0020] like Figure 1As shown, a bearing disassembly tool includes a back plate 1, columns 5, connecting beams 4, support sleeves 3, hydraulic jacks 2, a base plate 6, and a pad 7. The back plate 1 is mounted on one end of the base plate 6, and a support plate 11 is mounted on the back of the back plate 1. The support plate 11 provides support and strengthens the back plate 1 during bearing disassembly by pushing. Columns 5 are positioned laterally on both sides of the base plate 6 at intervals. The columns 5 are connected to the back plate 1 by the connecting beams 4, which in turn connect the columns 5 to the back plate 1, reinforcing the support force of the columns 5. A hydraulic jack 2 is installed on one side of the back plate 1 between the back plate 1 and the column 5, and a support sleeve 3 is installed on one side of the column 5. The tail end of the hydraulic jack 2 abuts against the surface of the back plate 1, and the outer surfaces of the support sleeve 3 on both sides abut against the surface of the column 5. The support sleeve 3 can be widened laterally by processing baffles 32 on both sides to increase the contact area between the column 5 and the support sleeve 3, thereby increasing the limiting force during the pushing and disassembling of the bearing 8. The hydraulic jack 2 is placed laterally between the column 5 and the back plate 1, and the push rod of the hydraulic jack 2 extends towards the column 5. The tail end of the hydraulic jack 2 rests against the back plate 1, which supports the hydraulic jack 2. The support sleeve 3 has a bearing hole at its center and bolt through holes 31 on its outer circumference. A through cover is bolted to the support sleeve 3. A bearing 8 on the shaft head of the roller body 9 is installed inside the bearing hole of the support sleeve 3. The through cover is bolted to the surface of the support sleeve 3 facing the roller body 9 through the bolt through holes 31. The through cover latches onto the bearing 8 from one side of the roller body 9, with the inner ring of the through cover contacting the outer ring of the bearing 8. During the process of pushing the roller body 9 on the circular surface, the bearing 8 is restricted from moving together with the roller body 9 towards the roller body 9. The support sleeve 3 is restricted from moving towards the roller body 9 by the column 5. The bearing 8 inside the support sleeve is restricted from moving towards the roller body 9 during the pushing and disassembly. The push rod of the hydraulic jack 2 is pushed against the end of the shaft of the roller body 9. The bearing 8 is disassembled by pushing with the hydraulic jack 2. A pad 7 is provided on the upper surface of the base plate 6. The pad 7 supports the roller body 9 to prevent damage to the roller body 9 during the disassembly process.

[0021] Furthermore, the bearing hole diameter of the support sleeve 3 is consistent with the inner diameter of the bearing seat of the bearing to be replaced 8.

[0022] Furthermore, the through cover is disposed on the outer surface of the support sleeve 3 on the side away from the hydraulic jack 2, and the through cover limits the bearing 8 to the outside in the direction of the roller body 9.

[0023] Furthermore, a rubber pad layer is provided on the upper surface of the pad 7, which serves to prevent slipping, shock absorption, and impact.

[0024] Furthermore, the bearing disassembly tool also includes an extension rod, which is set at the top of the push rod of the hydraulic jack 2 when pushing the bearing. When the extension of the push rod of the hydraulic jack 2 is insufficient to disassemble the bearing 8, an extension rod is set at the end of the push rod of the hydraulic jack 2 to increase the extension of the push rod and disassemble the bearing 8.

[0025] Furthermore, the center line of the bearing hole of the support sleeve 3 coincides with the center line of the hydraulic jack 2.

[0026] 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 concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bearing disassembly tool, comprising a back plate, a column, a connecting beam, a support sleeve, a hydraulic jack, a through cover, a base plate, and a pad, wherein the back plate is provided at one end of the base plate, characterized in that, The back plate has columns spaced at intervals on both sides of the base plate. The columns are connected to the back plate by a connecting beam. A hydraulic jack is installed on one side of the back plate between the back plate and the columns, and a support sleeve is installed on one side of the columns. The tail end of the hydraulic jack rests against the surface of the back plate, and the outer surfaces of the support sleeve on both sides rest against the inner surface of the column. A bearing hole is provided in the center of the support sleeve, and bolt through holes are provided on the outer circumference of the support sleeve. The support sleeve is bolted to a through cover. A pad is provided on the upper surface of the base plate.

2. The bearing disassembly tool according to claim 1, characterized in that, The bearing hole diameter of the support sleeve is the same as the inner diameter of the bearing housing of the bearing to be replaced.

3. A bearing disassembly tool according to claim 1, characterized in that, The transparent cover is located on the outer surface of the support sleeve on the side away from the hydraulic jack.

4. A bearing disassembly tool according to claim 1, characterized in that, A rubber pad layer is provided on the upper surface of the pad plate.

5. A bearing disassembly tool according to claim 1, characterized in that, The bearing disassembly tool also includes an extension rod, which is positioned at the top of the hydraulic jack's push rod when the bearing is being pushed.

6. A bearing disassembly tool according to claim 1, characterized in that, The center line of the bearing hole of the support sleeve coincides with the center line of the hydraulic jack.

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