A disassembly method and disassembly tooling for a small bearing inner ring

Abstract

A method and tooling for disassembling the inner ring of a small bearing, relating to the technical field of small bearing disassembly. The disassembly method includes the following steps: First, install several short disassembly bolts on the loading plate, sleeve the disassembly pressure plate and the positioning plate from both sides of the test shaft and clamp and fix the loading plate, thereby forming an integrated disassembly tooling. Then, push the tooling to move along the spacer sleeve to one side and place the short disassembly bolts into the semi-circular through holes of the shaft shoulder of the test shaft until a part of the inner ring of the bearing to be disassembled is separated from the test shaft. Then, move the disassembly tooling away from the shaft shoulder of the test shaft, replace the short disassembly bolts with long disassembly bolts, and continue to apply force to the disassembly tooling until the inner ring of the bearing to be disassembled is completely separated from the test shaft. Through the above steps, the disassembly space of the inner ring of the small bearing can be effectively increased, and the force on the inner ring of the small bearing during disassembly can be balanced, thereby effectively avoiding failure problems such as deformation and damage of the inner ring of the small bearing during disassembly. At the same time, the disassembly time is reduced and the disassembly efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing disassembly, and in particular to a disassembly method and a disassembly tool for an inner ring of a small bearing. Background Art

[0002] Practice has shown that improper operation during the installation or removal of bearings is one of the causes of premature bearing damage. Installing and removing the inner ring of a small bearing with interference fit is a very difficult task, so it is necessary to consider how to install and remove the bearing and how to facilitate installation and removal.

[0003] Traditional bearing disassembly methods generally include: tapping, pulling, pushing, and thermal removal. In the tapping method, the striking force is generally applied to the bearing inner ring, but this force is difficult to control and can easily damage the bearing inner ring. The pulling method often uses a specialized tool called a "puller." The puller's jaws engage the end face of the bearing inner ring, a screw is used to support the test shaft, and the inner ring is pulled out by rotating the handle. However, the puller is unstable, the screw is prone to skew, and the jaws exert uneven force on the bearing inner ring, which can easily cause deformation. The pushing method uses a specialized press. A square iron is placed on the shaft shoulder and the press is used to press against the test shaft to push the bearing inner ring out. The thermal removal method uses a specialized heater to rapidly heat the bearing inner ring, causing it to expand. However, it is important to ensure that the thermal expansion of the bearing exceeds that of the test shaft to ensure a clearance fit between the bearing and the shaft after heating. However, induction heating can cause unnecessary heating of the bearing, which can severely anneal the bearing structure and reduce bearing performance. Moreover, the knocking method, the pulling method, and the pushing method all require a larger operating space.

[0004] In a high-speed bearing testing machine, the test shaft installation structure used is as follows Figure 1 As shown, the inner ring 2 of the bearing to be removed is installed on the shoulder of the test shaft 1, and the spacer 9 and the large bearing 12 are installed in sequence on the other side of the shoulder 11. Since the inner ring 2 of the bearing to be removed is a small bearing with a nominal outer diameter size range of 26-55mm, during the disassembly process, the inner ring 2 of the bearing must be removed first, and then the large bearing 12 can be removed. Since the gap between the large bearing 12 and the shoulder 11 is only 10-25mm, the operating space is small, and there is a certain distance between the end face of one side of the shoulder 11 and the inner ring 2 of the bearing to be removed. Due to the special structure, traditional disassembly tools cannot be used, so it has the disadvantages of being difficult to disassemble and time-consuming.

[0005] In the prior art, for example, in Chinese Patent CN202211189179.0, a small and medium-sized bearing disassembly device is disclosed, which includes a base. A bearing disassembly hole is provided at the center of the base. The inner ring of the bearing to be disassembled is installed on the shaft. Three clamping slots are evenly provided on the upper surface of the base along the radial direction. A clamping jaw is slidably installed in each clamping slot. The clamping jaw is driven to rotate by a spiral drive disk, so that the head of the clamping jaw abuts against the end face of the inner ring of the bearing. The spiral drive disk is installed at the bottom of the base. The disassembly of small bearings can be realized through the above three-jaw chuck structure, but this structure requires a large operating space, so it cannot be applied to the test shaft described in this article to complete the disassembly process. Summary of the Invention

[0006] To solve the technical problems of the large disassembly difficulty and long disassembly time of the inner ring of small bearings in a narrow space in the prior art, the purpose of the present invention is to propose a disassembly method and a disassembly tooling for the inner ring of a small bearing.

[0007] The technical solution adopted by the present invention is as follows: A disassembly method for the inner ring of a small bearing, the steps are as follows:

[0008] S1. Screw a number of short disassembly bolts into the threaded holes of the two semi-circular loading plates respectively, then clamp the two semi-circular loading plates on the spacer sleeve, clamp the disassembly pressing plate and the positioning plate on both sides of the loading plate, and form an integrated disassembly tooling through the locking parts for the disassembly pressing plate, the positioning plate and the two semi-circular loading plates. Then push the tooling along the spacer sleeve to one side and put the short disassembly bolts into the semi-circular through holes of the test shaft shoulder.

[0009] S2. Continue to apply force to the disassembly tooling. After the short disassembly bolts are stressed, they push the inner ring of the bearing to be disassembled to move, so that the inner ring of the bearing to be disassembled is partially separated from the test shaft. At this time, one side of the disassembly tooling abuts against the test shaft shoulder.

[0010] S3. Then move the disassembly tooling away from the test shaft shoulder, remove the short disassembly bolts, screw the long disassembly bolts into the threaded holes of the loading plate, apply force to the disassembly tooling again, the long disassembly bolts move and contact the end face of the inner ring of the bearing to be disassembled, and continue to push the disassembly tooling until the inner ring of the bearing to be disassembled is completely separated from the test shaft.

[0011] As a preferred solution, in step S1, a number of disassembly bolts are evenly distributed on the two semi-circular loading plates to balance the force on the inner ring of the bearing during disassembly. The number of disassembly bolts is the same as the number of semi-circular through holes on the test shaft shoulder.

[0012] As a preferred solution, in step S1, a circular groove with a shape adapted to the shape of the loading plate is machined on the clamping surfaces of the disassembly pressing plate and the positioning plate respectively to stably clamp the loading plate.

[0013] This solution also includes a disassembly tooling for the inner ring of a small bearing. This disassembly tooling is clamped on the spacer sleeve of the test shaft and located within the gap between the shoulder of the test shaft and the large bearing. The disassembly tooling includes an annular loading plate, disassembly pressure plates and positioning plates clamped on both sides of the loading plate, and locking components. The loading plate is of a split structure, and the disassembly pressure plates, positioning plates and loading plate are fixed into an integral structure through the locking components. A number of threaded holes for installing disassembly bolts are evenly distributed on the loading plate.

[0014] As a preferred solution, the loading plate is formed by splicing two semi-circular plate pieces.

[0015] As a preferred solution, a through hole is provided in the middle of the disassembly pressure plate, and the diameter of this through hole is larger than the outer diameter of the large bearing.

[0016] As a preferred solution, a through hole is provided in the middle of the positioning plate, and the diameter of this through hole is larger than the outer diameter of the shoulder of the test shaft.

[0017] As a preferred solution, circular grooves are correspondingly provided on the clamping surfaces of the disassembly pressure plate and the positioning plate, and the shape of this groove is adapted to the shape of the loading plate.

[0018] As a preferred solution, mounting holes for installing locking components are respectively provided at the outer edges of the disassembly pressure plate and the positioning plate relative to the spacer sleeve.

[0019] As a preferred solution, the disassembly pressure plate and the positioning plate are fastened on both sides of the loading plate by setting connecting bolts and nuts in the mounting holes.

[0020] The beneficial effects of the present invention are as follows:

[0021] Based on the defects existing in the prior art, this application provides a method for disassembling the inner ring of a small bearing. The disassembly steps are optimized as follows: First, a number of short disassembly bolts are installed on the loading plate, the disassembly pressure plate and the positioning plate are sleeved from both sides of the test shaft and clamped to fix the loading plate. Then, the tooling is pushed to move along the spacer sleeve to one side and the short disassembly bolts are placed into the semi-circular through holes of the shoulder of the test shaft until a part of the inner ring of the bearing to be disassembled is separated from the test shaft. Then, the disassembly tooling is moved away from the shoulder of the test shaft, the short disassembly bolts are replaced with long disassembly bolts, and a force is applied to the disassembly tooling until the inner ring of the bearing to be disassembled is completely separated from the test shaft. Through the above steps, the disassembly space of the inner ring of the small bearing can be effectively increased, and the stress condition of the inner ring of the small bearing during disassembly can be balanced, thereby effectively avoiding failure problems such as deformation and damage of the inner ring of the small bearing during the disassembly process. At the same time, the disassembly time is reduced and the disassembly efficiency is improved.

[0022] This solution also includes a disassembly tooling. By combining a disassembly pressing plate, a positioning plate, a loading plate, disassembly bolts and locking parts into an integrated disassembly tooling, this tooling is just clamped in the gap between the large bearing and the inner ring of the bearing to be disassembled, and the disassembly process is completed by adjusting the disassembly bolts of different lengths. Therefore, disassembly bolts of different length specifications can be installed according to different disassembly spaces, solving the problem that the disassembly space is narrow and the inner ring of the small bearing cannot bear force. At the same time, the assembled disassembly bolts are placed in the semi-circular through hole at the shaft shoulder part of the test shaft, so as to resist the inner ring of the bearing to be disassembled. Through the guiding function of the semi-circular through hole, the force on the inner ring of the small bearing during disassembly can be balanced, avoiding failure problems such as deformation and damage of the inner ring of the small bearing during the disassembly process. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the installation structure of the inner ring of the bearing to be disassembled in the prior art;

[0025] Figure 2 It is a schematic diagram of the specific implementation state of the disassembly tooling described in the present invention;

[0026] Figure 3 It is an exploded view of the disassembly tooling described in the present invention;

[0027] Figures 4 - 6 It is a process schematic diagram of the disassembly method described in the present invention.

[0028] Reference Numerals: 1. Test shaft, 2. Inner ring of the bearing to be disassembled, 3. Short disassembly bolt, 4. Loading plate, 5. Nut, 6. Positioning plate, 7. Disassembly pressing plate, 8. Connecting bolt, 9. Sleeve, 10. Long disassembly bolt, 11. Shaft shoulder, 12. Large bearing, 13. Threaded hole. Detailed Description of the Embodiments

[0029] Next, the present invention will be specifically described through exemplary embodiments. However, it should be understood that without further description, the elements, structures and features in one embodiment can also be beneficially combined into other embodiments.

[0030] It should be noted that: Unless otherwise defined, the technical terms or scientific terms used in this article shall have the ordinary meanings understood by those with ordinary skills in the field to which this invention belongs. The words such as "a", "an", or "the" used in the description and claims of this patent application for invention do not express a limitation of quantity, but mean that there is at least one. Words such as "comprising" or "including" indicate that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, but do not exclude other elements or objects with the same functions.

[0031] In order to more clearly describe the specific structural composition of a disassembly tool for a small bearing inner ring and the disassembly process of the bearing inner ring, in conjunction with the attached Figures 1 - 6 It is described in detail as follows:

[0032] As Figures 2 - 3 shown, a disassembly tool for a small bearing inner ring is clamped on the spacer sleeve 9 of the test shaft 1 and is located in the gap between the shaft shoulder 11 of the test shaft and the large bearing 12. The disassembly tool includes an annular loading plate 4, disassembly pressure plates 7, a positioning plate 6 and locking parts clamped on both sides of the loading plate 4. The loading plate 4 adopts a split structure, and the disassembly pressure plates 7, the positioning plate 6 and the split loading plate 4 are fixed into an integral structure through the locking parts. A number of threaded holes 13 for installing disassembly bolts are evenly distributed on the loading plate 4. The disassembly tool completes the disassembly process by adjusting disassembly bolts of different lengths. Therefore, disassembly bolts of different length specifications can be installed according to different disassembly spaces to solve the problem that the disassembly space is narrow and the inner ring of the small bearing cannot be stressed.

[0033] As Figure 3 shown, in this embodiment, the loading plate 4 is formed by splicing two semi-circular plate parts to facilitate the two plate parts to be clamped on the spacer sleeve 9 from both sides.

[0034] In this embodiment, a through hole is provided in the middle of the disassembly pressure plate 7, and the diameter of the through hole is larger than the outer diameter of the large bearing 12; a through hole is provided in the middle of the positioning plate 6, and the diameter of the through hole is larger than the outer diameter of the shaft shoulder 11, so as to enable the disassembly pressure plate 7 and the positioning plate 6 to be sleeved from both sides of the test shaft 1 and clamped on the loading plate 4.

[0035] As Figure 3 shown, in this embodiment, circular grooves are correspondingly provided on the clamping surfaces of the disassembly pressure plate 7 and the positioning plate 6, and the shape of the grooves is adapted to the shape of the loading plate 4 to achieve a stable clamping effect.

[0036] In this embodiment, the disassembly pressure plate 7 and the positioning plate 6 are respectively provided with mounting holes for installing locking parts at the outer edges relative to the spacer 9, and the disassembly pressure plate 7 and the positioning plate 6 are fastened to the two side surfaces of the loading plate 4 by arranging connecting bolts 8 and nuts 5 in the mounting holes.

[0037] This solution also includes a method for disassembling the inner ring of a small bearing, such as Figures 4 - 6 As shown, the disassembly steps are as follows:

[0038] Step 1: Screw several short disassembly bolts 3 into the threaded holes 13 of the two semicircular loading plates 4 respectively, then clamp the two semicircular loading plates 4 on the spacer 9, insert the disassembly pressure plate 7 and the positioning plate 6 through both sides of the test shaft 1 and clamp them on both sides of the loading plate 4, and then fix the disassembly pressure plate, positioning plate and split loading plate into an integrated disassembly tool by connecting bolts and nuts. Then push the tool to one side along the spacer and place the short disassembly bolts 3 into the semicircular through-holes of the test shaft shoulder 11;

[0039] Step 2: Continue to apply force to the disassembly tool. After the short disassembly bolts are loaded, they push the inner ring of the bearing to be disassembled to move so that the inner ring of the bearing to be disassembled is partially separated from the test shaft. Figure 4 As shown, at this time, one side of the loading plate 4 in the disassembly tool is against the end face of the shoulder 11 of the test shaft;

[0040] Step 3: Figure 5 As shown, then move the disassembly tool away from the test shaft shoulder, remove the short disassembly bolt, screw the long disassembly bolt 10 into the threaded hole of the loading plate, apply force to the disassembly tool again, the long disassembly bolt 10 moves and contacts the end face of the bearing inner ring 2 to be disassembled, and continue to push the disassembly tool to move until the bearing inner ring 2 to be disassembled is completely separated from the test shaft, as shown in FIG. Figure 6 shown.

[0041] In step one, several disassembly bolts are evenly distributed on two semicircular loading plates, and the number of disassembly bolts is the same as the number of semicircular through holes on the test shaft shoulder; to ensure that the disassembly bolts after assembly are placed in the semicircular through holes on the test shaft shoulder, thereby supporting the inner ring of the bearing to be disassembled. The guiding effect of the semicircular through holes can balance the force on the inner ring of the small bearing during disassembly, thereby avoiding deformation, damage and other failure problems of the small bearing inner ring during the disassembly process.

[0042] In step 1, in order to stably clamp the loading plate, a circular groove having a shape that matches the shape of the loading plate can be processed on the clamping surfaces of the disassembly pressure plate and the positioning plate respectively.

[0043] Parts not described in detail in this embodiment are prior art.

[0044] It should be noted that although the present invention has been described through the above embodiments, the present invention can also have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope protected by the appended claims of the present invention and their equivalents.

Claims

1. A method for disassembling the inner ring of a small bearing, characterized in that: The disassembly tooling used in this disassembly method includes an annular loading plate, disassembly pressure plates and positioning plates clamped on both sides of the loading plate, and locking parts. The loading plate is of a split structure, and a number of threaded holes for installing disassembly bolts are distributed on the loading plate. The disassembly steps are as follows: S1. Screw a number of short disassembly bolts into the threaded holes of the two semi-circular loading plates respectively, then clamp the two semi-circular loading plates on the spacer sleeve, clamp the disassembly pressure plate and the positioning plate on both sides of the loading plate, and form an integrated disassembly tooling by means of the locking parts. Then push the tooling along the spacer sleeve to move to one side and place the short disassembly bolts into the semi-circular through holes of the test shaft shoulder; S2. Continue to apply force to the disassembly tooling. After the short disassembly bolts are stressed, they push the inner ring of the bearing to be disassembled to move, so that the inner ring of the bearing to be disassembled is partially separated from the test shaft. At this time, one side of the disassembly tooling abuts against the test shaft shoulder; S3. Then move the disassembly tooling away from the test shaft shoulder, remove the short disassembly bolts, screw the long disassembly bolts into the threaded holes of the loading plate, apply force to the disassembly tooling again, the long disassembly bolts move and contact the end face of the inner ring of the bearing to be disassembled, and continue to push the disassembly tooling until the inner ring of the bearing to be disassembled is completely separated from the test shaft.

2. The disassembly method of a small bearing inner ring according to claim 1, characterized in that: In step S1, a number of disassembly bolts are evenly distributed on the two semi-circular loading plates to balance the force on the inner ring of the bearing during disassembly. The number of disassembly bolts is the same as the number of semi-circular through holes on the test shaft shoulder.

3. A method for disassembling a small bearing inner ring according to claim 1, characterized in that: In step S1, a circular groove whose shape is adapted to the shape of the loading plate is machined on the clamping surfaces of the disassembly pressure plate and the positioning plate respectively to stably clamp the loading plate.

4. The disassembly tooling used for the disassembly method of a small bearing inner ring according to any one of claims 1-3, the disassembly tooling is clamped on the spacer sleeve of the test shaft and located in the gap between the shoulder of the test shaft and the large bearing, and is characterized in that: The disassembly tooling includes an annular loading plate, disassembly pressure plates and positioning plates clamped on both sides of the loading plate, and locking parts. The loading plate is of a split structure, and the disassembly pressure plates, the positioning plates and the loading plate are fixed into an integrated structure by means of the locking parts. A number of threaded holes for installing disassembly bolts are evenly distributed on the loading plate.

5. The disassembly tooling according to claim 4, characterized in that: The loading plate is formed by splicing two semi-circular plate parts.

6. The disassembling tooling according to claim 4, wherein: A through hole is provided in the middle of the disassembly pressure plate, and the diameter of the through hole is larger than the outer diameter of the large bearing.

7. The disassembling tooling according to claim 6, wherein: A through hole is provided in the middle of the positioning plate, and the diameter of the through hole is larger than the outer diameter of the test shaft shoulder.

8. The disassembly tooling according to claim 4, wherein: Circular grooves are correspondingly provided on the clamping surfaces of the disassembly pressure plate and the positioning plate, and the shape of the grooves is adapted to the shape of the loading plate.

9. The disassembly tooling according to claim 4, wherein: On the outer edges of the disassembly pressure plate and the positioning plate relative to the spacer sleeve, mounting holes for installing the locking parts are respectively provided.

10. The disassembly tooling according to claim 9, wherein: The disassembly pressure plate and the positioning plate are fastened on both sides of the loading plate by arranging connecting bolts and nuts in the mounting holes.

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