Lossless dismounting tool for oil film bearing

Abstract

The utility model discloses an oil film bearing lossless dismounting tool which comprises a hydraulic cylinder, a taper rod is installed in the hydraulic cylinder, a taper sleeve located on the output end side of the hydraulic cylinder is arranged on the taper rod in a sleeved mode, a taper block is arranged on the taper rod, a taper cavity corresponding to the taper block is formed in the taper sleeve, and the lower end of the taper block is connected with a threaded rod. A nut is meshed on the screw rod, a cross groove is arranged on the taper sleeve, and steps are arranged on the circumference of the taper sleeve. The hydraulic cylinder is installed on the eccentric sleeve, the conical block is matched with the conical cavity in the conical sleeve, the conical sleeve is expanded, the upper end face of the oil film bearing is clamped by the step on the circumference of the conical sleeve, then the hydraulic cylinder applies pressure to the conical sleeve to eject the oil film bearing, the oil film bearing dismounting efficiency is improved, and the oil film bearing dismounting efficiency is improved. And the whole upper end surface of the oil film bearing is uniformly stressed during disassembly, so that the oil film bearing is prevented from being damaged.

Description

Technical Field

[0001] This utility model belongs to the field of oil film bearing disassembly technology, specifically relating to a non-destructive disassembly tool for oil film bearings. Background Technology

[0002] As a crucial and indispensable piece of equipment in steel rolling production, the roller box is characterized by high speed and high load. Due to its harsh operating environment, the frequency of roller box maintenance and installation is gradually increasing. Key components of the roller box include the box panel, eccentric sleeve, roller shaft, herringbone plate, and lead screw, while supporting components include rolling bearings and oil film bearings. Rolling bearings mainly bear the axial force of the roller shaft, while oil film bearings mainly bear the radial force. During the rolling process, the diameter of the steel billet decreases as it passes through the roller box, resulting in very high forces on the oil film bearings. The eccentric sleeve, as the carrier of the oil film bearing, generally does not experience much wear. However, the oil film bearing, as the carrier of the roller shaft, typically shows wear after one maintenance cycle, thus requiring very frequent replacement.

[0003] Basically, when maintaining the roller box, the oil film bearing must be replaced. Due to the eccentric sleeve structure, the mounting hole of the small-end oil film bearing is a blind hole structure, which cannot be disassembled using conventional tools. Currently, it can only be removed by destructive means. Generally, mechanical processing or tools such as electric grinders are used to destroy the oil film bearing. Both of these methods are labor-intensive, take about 1 hour to disassemble, and are very likely to damage the eccentric sleeve body and render it unusable. Furthermore, during the assembly of a new roller box, if the oil film bearing is not installed in the correct position, the oil film bearing can only be destroyed, resulting in wasted costs. Utility Model Content

[0004] The purpose of this invention is to provide a non-destructive disassembly tool for oil film bearings, thereby solving the problems mentioned in the background section. The non-destructive disassembly tool for oil film bearings provided by this invention has the characteristics of improving the disassembly efficiency of oil film bearings and preventing damage to the bearings.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-destructive disassembly tool for oil film bearings, comprising a hydraulic cylinder, a tapered rod installed inside the hydraulic cylinder, a tapered sleeve located on the output end side of the hydraulic cylinder fitted on the tapered rod, a tapered block provided on the tapered rod, a tapered cavity corresponding to the tapered block provided on the tapered sleeve, a screw connected to the lower end of the tapered block, a nut engaged on the screw, a cross groove provided on the tapered sleeve, and a step provided on the circumference of the tapered sleeve.

[0006] In order to enable the tapered sleeve to automatically reset after separation from the tapered rod, thus allowing for reuse, the tapered sleeve is further made of spring steel.

[0007] In order to apply pressure to the tapered sleeve and disassemble the oil film bearing, the hydraulic cylinder further includes a cylinder body, an internal cavity, a piston ring sliding inside the cavity, an oil inlet communicating with the cavity at the upper end of the cylinder body, and a limit ring connected to the lower end of the cylinder body.

[0008] To further seal the piston rings and the cavity, sealing rings are provided on both the inner and outer circumferences of the piston rings.

[0009] To further install the hydraulic cylinder onto the eccentric sleeve, a mounting ring is provided around the circumference of the cylinder body.

[0010] To achieve circumferential limiting of the tapered rod, it will not rotate when the nut is tightened. Furthermore, a mounting cavity is provided at the center of the cylinder body, and an internal hexagonal hole is provided at the lower end of the mounting cavity. An external hexagonal rod is connected to the upper end of the tapered block.

[0011] In order to allow the tapered rod to automatically reset after the piston ring retracts inward, a spring is further fitted on the outer hexagonal rod, and the spring is located inside the mounting cavity.

[0012] To further limit the movement of the spring, a pressure cap is provided at the upper end of the external hexagonal rod, and the pressure cap is connected to the external hexagonal rod by a fixing bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model installs a hydraulic cylinder on an eccentric sleeve. The tapered block cooperates with the tapered cavity inside the tapered sleeve to open the tapered sleeve, so that the step on the circumference of the tapered sleeve jams the upper end face of the oil film bearing. Then, the hydraulic cylinder applies pressure to the tapered sleeve to push out the oil film bearing. This not only improves the disassembly efficiency of the oil film bearing, but also avoids damage to the oil film bearing because the entire upper end face of the oil film bearing is evenly stressed during disassembly.

[0015] 2. The tapered sleeve of this utility model is made of spring steel. After the tapered sleeve separates from the tapered rod, the tapered sleeve can automatically return to its original position, thereby enabling repeated use.

[0016] 3. This utility model achieves circumferential limiting of the tapered rod by cooperating with the external hexagonal rod and the internal hexagonal hole, so that the tapered rod will not rotate when tightening the nut;

[0017] 4. A spring is fitted on the external hexagonal rod of this utility model, so that the tapered rod can automatically reset after the piston ring retracts inward. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model;

[0020] Figure 3 This is a cross-sectional view of the hydraulic cylinder of this utility model;

[0021] Figure 4 This is a schematic diagram of the cone sleeve of this utility model;

[0022] Figure 5 This is a cross-sectional view of the tapered sleeve of this utility model;

[0023] Figure 6 This is a schematic diagram of the tapered rod of this utility model;

[0024] Figure 7 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the oil film bearing during disassembly according to this utility model;

[0026] In the diagram: 1. Fixing bolt; 2. Gland; 3. Hydraulic cylinder; 31. Cylinder body; 32. Mounting ring; 33. Limiting ring; 34. Piston ring; 35. Internal hexagonal hole; 36. Sealing ring; 37. Mounting cavity; 38. Oil inlet; 39. Cavity; 4. Tapered sleeve; 41. Tapered cavity; 42. Cross groove; 43. Step; 5. Nut; 6. Tapered rod; 61. Tapered block; 62. External hexagonal rod; 63. Screw; 7. Spring; 8. Mounting bolt; 9. Eccentric sleeve; 10. Oil film bearing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 1-8 The present invention provides the following technical solution: a non-destructive disassembly tool for oil film bearings, comprising a hydraulic cylinder 3, a tapered rod 6 installed inside the hydraulic cylinder 3, a tapered sleeve 4 located on the output end side of the hydraulic cylinder 3 fitted on the tapered rod 6, a tapered block 61 provided on the tapered rod 6, a tapered cavity 41 corresponding to the tapered block 61 provided on the tapered sleeve 4, a screw 63 connected to the lower end of the tapered block 61, a nut 5 engaged on the screw 63, a cross groove 42 provided on the tapered sleeve 4, and a step 43 provided on the circumference of the tapered sleeve 4.

[0030] By adopting the above technical solution, the present invention installs the hydraulic cylinder 3 on the eccentric sleeve 9, and the tapered block 61 cooperates with the tapered cavity 41 inside the tapered sleeve 4 to open the tapered sleeve 4, so that the step 43 on the circumference of the tapered sleeve 4 jams the upper end face of the oil film bearing 10. Then, the hydraulic cylinder 3 applies pressure to the tapered sleeve 4 to push out the oil film bearing 10. This not only improves the disassembly efficiency of the oil film bearing 10, but also avoids damage to the oil film bearing 10 because the entire upper end face of the oil film bearing 10 is evenly stressed during disassembly.

[0031] Specifically, the cone sleeve 4 is made of spring steel.

[0032] By adopting the above technical solution, the tapered sleeve 4 can automatically reset after it separates from the tapered rod 6, thus enabling reuse.

[0033] Specifically, the hydraulic cylinder 3 includes a cylinder body 31, an internal cavity 39, a piston ring 34 sliding inside the cavity 39, an oil inlet 38 communicating with the cavity 39 at the upper end of the cylinder body 31, and a limit ring 33 connected to the lower end of the cylinder body 31.

[0034] By adopting the above technical solution, pressure is applied to the tapered sleeve 4 to disassemble the oil film bearing 10.

[0035] Specifically, sealing rings 36 are provided on both the inner and outer circumferences of the piston ring 34.

[0036] The above technical solution is used for sealing the piston ring 34 and the cavity 39.

[0037] Specifically, the cylinder block 31 is provided with an mounting ring 32 around its circumference.

[0038] The above technical solution is used to install the hydraulic cylinder 3 onto the eccentric sleeve 9.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that: specifically, a mounting cavity 37 is provided at the center of the cylinder body 31, an internal hexagonal hole 35 is provided at the lower end of the mounting cavity 37, and an external hexagonal rod 62 is connected to the upper end of the conical block 61.

[0041] By adopting the above technical solution, the tapered rod 6 is circumferentially limited by the cooperation between the external hexagonal rod 62 and the internal hexagonal hole 35, so that the tapered rod 6 will not rotate when the nut 5 is tightened.

[0042] Example 3

[0043] The difference between this embodiment and embodiment 1 is that, specifically, a spring 7 is sleeved on the external hexagonal rod 62, and the spring 7 is located inside the mounting cavity 37.

[0044] By adopting the above technical solution, the tapered rod 6 can be automatically reset after the piston ring 34 retracts inward.

[0045] Specifically, the upper end of the external hexagonal rod 62 is provided with a pressure cap 2, and the pressure cap 2 is connected to the external hexagonal rod 62 by a fixing bolt 1.

[0046] By adopting the above technical solution, the spring 7 is limited.

[0047] The steps for using this utility model are as follows:

[0048] (1) Install the hydraulic cylinder 3 onto the eccentric sleeve 9 using mounting bolts 8;

[0049] (2) Insert the tapered sleeve 4 into the lower end of the tapered rod 6 and tighten the nut 5. At this time, the tapered sleeve 4 will be opened by the action of the tapered block 61, so that the step 43 on the circumference of the tapered sleeve 4 will be stuck on the upper end face of the oil film bearing 10.

[0050] (3) Use a high-pressure pump to inject hydraulic oil into the cavity 39 through the oil inlet 38, so that the piston ring 34 extends out and acts on the end face of the tapered sleeve 4, pushing the tapered sleeve 4 downward, thereby realizing the disassembly of the oil film bearing 10.

[0051] (4) Unscrew the nut 5 and remove the tapered sleeve 4. Then, draw back the hydraulic oil, retract the piston ring 34, and reset the tapered rod 6 under the action of the spring 7. Then, remove the mounting bolt 8 and take out the hydraulic cylinder 3 along with the tapered rod 6.

[0052] In summary, this invention mounts the hydraulic cylinder 3 on the eccentric sleeve 9. The tapered block 61 engages with the tapered cavity 41 within the tapered sleeve 4 to open the tapered sleeve 4, causing the step 43 on the circumference of the tapered sleeve 4 to lock onto the upper end face of the oil film bearing 10. Then, the hydraulic cylinder 3 applies pressure to the tapered sleeve 4 to push out the oil film bearing 10. This not only improves the disassembly efficiency of the oil film bearing 10 but also prevents damage to the oil film bearing 10 during disassembly because the entire upper end face of the oil film bearing 10 is evenly stressed. The tapered sleeve 4 is made of spring steel, allowing it to automatically reset after separation from the tapered rod 6, thus enabling reuse. The external hexagonal rod 62 engages with the internal hexagonal hole 35 to achieve circumferential positioning of the tapered rod 6, preventing rotation when tightening the nut 5. A spring 7 is fitted onto the external hexagonal rod 62, allowing the tapered rod 6 to automatically reset after the piston ring 34 retracts inward.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-destructive disassembly tool for oil film bearings, characterized in that: The device includes a hydraulic cylinder, inside which a tapered rod is installed. A tapered sleeve located on the output end of the hydraulic cylinder is fitted onto the tapered rod. A tapered block is provided on the tapered rod. A tapered cavity corresponding to the tapered block is provided on the tapered sleeve. A screw is connected to the lower end of the tapered block. A nut is engaged on the screw. A cross groove is provided on the tapered sleeve. A step is provided on the circumference of the tapered sleeve.

2. The non-destructive disassembly tool for oil film bearings according to claim 1, characterized in that: The tapered sleeve is made of spring steel.

3. The non-destructive disassembly tool for oil film bearings according to claim 1, characterized in that: The hydraulic cylinder includes a cylinder body, an internal cavity, a piston ring that slides inside the cavity, an oil inlet communicating with the cavity at the upper end of the cylinder body, and a limit ring connected to the lower end of the cylinder body.

4. The non-destructive disassembly tool for oil film bearings according to claim 3, characterized in that: The piston rings are provided with sealing rings on both the inner and outer circumferences.

5. The non-destructive disassembly tool for oil film bearings according to claim 3, characterized in that: The cylinder body is provided with a mounting ring around its circumference.

6. The non-destructive disassembly tool for oil film bearings according to claim 3, characterized in that: The cylinder body has a mounting cavity at its center, and the lower end of the mounting cavity has an internal hexagonal hole.

7. The non-destructive disassembly tool for oil film bearings according to claim 6, characterized in that: The upper end of the conical block is connected to an external hexagonal rod.

8. The non-destructive disassembly tool for oil film bearings according to claim 7, characterized in that: A spring is fitted onto the external hexagonal rod, and the spring is located inside the mounting cavity.

9. The non-destructive disassembly tool for oil film bearings according to claim 8, characterized in that: The upper end of the external hexagonal rod is provided with a pressure cap, and the pressure cap is connected to the external hexagonal rod by fixing bolts.

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