Dismounting method and dismounting tool for small bearing inner ring

Abstract

The invention relates to the technical field of small bearing disassembly, in particular to a disassembly method and tool for a small bearing inner ring, and the disassembly method comprises the following steps that firstly, a plurality of short disassembly bolts are installed on a loading plate, a disassembly pressing plate and a positioning plate are arranged from the two sides of a test shaft in a sleeving mode, and the loading plate is clamped and fixed, so that the integrated disassembly tool is formed; then the tool is pushed to move towards one side along the spacer bush, the short dismounting bolt is placed in the semicircular through hole of the shaft shoulder of the test shaft until the inner ring of the bearing to be dismounted is partially separated from the test shaft, then the dismounting tool is moved away from the shaft shoulder of the test shaft, the long dismounting bolt is replaced, and force is continuously applied to the dismounting tool until the inner ring of the bearing to be dismounted is completely separated from the test shaft; through the steps, the disassembly space of the small bearing inner ring can be effectively increased, the stress condition of the small bearing inner ring during disassembly is balanced, and therefore the failure problems of deformation, damage and the like occurring in the disassembly process of the small bearing inner ring are effectively solved, meanwhile, the disassembly time is shortened, and the disassembly efficiency is improved.

Description

Technical Field

[0001] The 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 reasons for premature bearing damage. It is very difficult to install and remove the inner ring of a small bearing with interference fit, 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 are generally: knocking method, pulling method, pushing method and thermal disassembly method. In the knocking method, the knocking force is generally applied to the inner ring of the bearing, but the knocking force is not easy to control and can easily cause damage to the inner ring of the bearing; the pulling method often uses a special tool "puller", with the puller's claws clamped on the end face of the inner ring of the bearing, the test shaft supported by the screw, and the inner ring of the bearing pulled out by rotating the handle, but the puller has poor stability, the screw is easy to be skewed, and the force of the claws on the inner ring of the bearing is uneven, which can easily cause deformation of the inner ring of the bearing; the pushing method uses a special press, places a square iron on the shoulder of the shaft, and uses the press to press the test shaft to push out the inner ring of the bearing; the thermal disassembly method uses a special heater to quickly heat the inner ring of the bearing, so that the inner ring of the bearing expands due to heat, but it is necessary to confirm that the thermal expansion of the bearing is greater than the thermal expansion of the test shaft to ensure that the bearing and the shaft are in a clearance fit after heating, but induction heating will heat the bearing unnecessarily, which may cause annealing of the bearing structure and reduce bearing performance in severe cases. 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, traditional disassembly tools cannot be used due to the particularity of the structure, so it has the disadvantages of great difficulty in disassembly and high time consumption.

[0005] In the prior art, for example, Chinese patent CN202211189179.0 discloses a small and medium-sized bearing disassembly device, which includes a base, a bearing disassembly hole is provided in the center of the base, wherein the inner ring of the bearing to be disassembled is installed on the shaft; three grooves are evenly provided in the radial direction on the upper surface of the base, and a claw is slidably installed in each groove, and the claw is driven to rotate by a spiral transmission disk so that the head of the claw rests against the end face of the inner ring of the bearing; the spiral transmission disk is installed at the bottom of the base, and the small bearing can be disassembled by the above-mentioned three-jaw chuck structure, but the structure requires a large operating space, and therefore cannot be applied to the test shaft described in this article to complete the disassembly process. Summary of the invention

[0006] In order to solve the technical problems in the prior art that the inner rings of small and medium-sized bearings are difficult to disassemble and take a long time to disassemble in a narrow space, the purpose of the present invention is to provide a disassembly method and disassembly tool for the inner rings of small bearings.

[0007] The technical solution adopted by the present invention is: a method for disassembling the inner ring of a small bearing, the steps are as follows: S1. Screw several short disassembly bolts into the threaded holes of the two semicircular loading plates respectively, then clamp the two semicircular loading plates on the spacer, clamp the disassembly pressure plate and the positioning plate on both sides of the loading plate, and use the locking parts to form an integrated disassembly tool with the disassembly pressure plate, the positioning plate and the two semicircular loading plates, then push the tool to move to one side along the spacer and put the short disassembly bolts into the semicircular through holes on the test shaft shoulder; S2. Continue to apply force to the disassembly tool. After the short disassembly bolt is subjected to force, it pushes 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 tool is against the shoulder of the test shaft. S3. Then move the disassembly tool away from the shoulder of the test shaft, remove the short disassembly bolt, screw the long disassembly bolt into the threaded hole of the loading plate, apply force to the disassembly tool again, the long disassembly bolt moves and contacts the end face of the inner ring of the bearing to be disassembled, and continue to push the disassembly tool until the inner ring of the bearing to be disassembled is completely separated from the test shaft.

[0008] As a preferred solution, in step S1, a number of disassembly bolts are evenly distributed on two semicircular loading plates to balance the stress on the inner ring of the bearing during disassembly, and the number of disassembly bolts is the same as the number of semicircular through holes on the shoulder of the test shaft.

[0009] As a preferred solution, in step S1, a circular groove having a shape matching that of the loading plate is processed on the clamping surfaces of the disassembly pressure plate and the positioning plate respectively to stably clamp the loading plate.

[0010] The present solution also includes a disassembly tool for the inner ring of a small bearing, which is clamped on the spacer sleeve of the test shaft and located in the gap between the test shaft shoulder and the large bearing. The disassembly tool includes an annular loading plate, a disassembly pressure plate and a positioning plate clamped on both sides of the loading plate, and a locking piece. The loading plate is a split structure, and the disassembly pressure plate, the positioning plate and the loading plate are fixed into an integrated structure by the locking piece. A number of threaded holes for installing disassembly bolts are evenly distributed on the loading plate.

[0011] As a preferred solution, the loading plate is formed by splicing two semicircular plates.

[0012] As a preferred solution, 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.

[0013] As a preferred solution, 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.

[0014] 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 the grooves is adapted to the shape of the loading plate.

[0015] As a preferred solution, the disassembly pressure plate and the positioning plate are respectively provided with mounting holes for mounting locking members at their outer edges relative to the spacer.

[0016] As a preferred solution, the disassembly pressure plate and the positioning plate are fastened to both sides of the loading plate by arranging connecting bolts and nuts in the mounting holes.

[0017] The beneficial effects of the present invention are: Based on the defects existing in the prior art, the present application provides a method for disassembling the inner ring of a small bearing, and the disassembly steps are optimized as follows: first, a number of short disassembly bolts are installed on the loading plate, and the disassembly pressure plate and the positioning plate are inserted from both sides of the test shaft and clamped to fix the loading plate, and then the tooling is pushed to move to one side along the spacer and the short disassembly bolts are placed into the semicircular through hole on the shoulder of the test shaft until the inner ring of the bearing to be disassembled is partially detached from the test shaft, and then the disassembly tooling is moved away from the shoulder of the test shaft, and the long disassembly bolts are replaced, and force is applied to the disassembly tooling until the inner ring of the bearing to be disassembled is completely detached 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 condition of the inner ring of the small bearing during disassembly can be balanced, thereby effectively avoiding deformation, damage and other failure problems of the inner ring of the small bearing during the disassembly process, while reducing the disassembly time and improving the disassembly efficiency.

[0018] The present solution also includes a disassembly tool, which is an integrated disassembly tool formed by combining a disassembly pressure plate, a positioning plate, a loading plate, a disassembly bolt and a locking piece. The tool is just stuck 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 disassembly bolts of different lengths. Therefore, disassembly bolts of different lengths can be installed according to different disassembly spaces, thereby solving the problem that the disassembly space is small and the inner ring of the small bearing cannot be subjected to force. At the same time, the assembled disassembly bolts are placed in the semicircular through holes at the shoulder of the test shaft, 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 inner ring of the small bearing during the disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] 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; Figure 2 It is a schematic diagram of the disassembly tooling of the present invention in a specific implementation state; Figure 3 An exploded view of the disassembly tooling of the present invention; Figure 4-Figure 6 The figure is a schematic diagram of the disassembly process of the present invention.

[0021] Figure numerals: 1. test shaft, 2. inner ring of bearing to be disassembled, 3. short disassembly bolt, 4. loading plate, 5. nut, 6. positioning plate, 7. disassembly pressure plate, 8. connecting bolt, 9. spacer, 10. long disassembly bolt, 11. shaft shoulder, 12. large bearing, 13. threaded hole. DETAILED DESCRIPTION

[0022] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantitative limitations, but indicate the existence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0024] In order to more clearly describe the specific structural composition of a small bearing inner ring disassembly tool and the disassembly process of the bearing inner ring, combined with the attached Figure 1-6 The detailed description is as follows: like Figure 2-3 As shown, a disassembly tool for the inner ring of a small bearing 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, a disassembly pressure plate 7 clamped on both sides of the loading plate 4, a positioning plate 6 and a locking member. The loading plate 4 adopts a split structure, and the disassembly pressure plate 7, the positioning plate 6 and the split loading plate 4 are fixed into an integrated structure by the locking member. A plurality 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 lengths can be installed according to different disassembly spaces, thereby solving the problem that the disassembly space is small and the inner ring of the small bearing cannot be subjected to force.

[0025] like Figure 3 As shown, in this embodiment, the loading plate 4 is formed by splicing two semicircular plates, so that the two plates can be clamped on the spacer 9 at both sides.

[0026] 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 that the disassembly pressure plate 7 and the positioning plate 6 can be inserted through both sides of the test shaft 1 and clamped on the loading plate 4.

[0027] like Figure 3 As 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.

[0028] In this embodiment, the disassembly pressure plate 7 and the positioning plate 6 are respectively provided with mounting holes for installing locking members at the outer edges relative to the spacer sleeve 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.

[0029] This solution also includes a method for disassembling the inner ring of a small bearing, such as Figure 4-6 As shown, the disassembly steps are as follows: 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 the two sides of the test shaft 1 and clamp them on the two sides of the loading plate 4, and then fix the disassembly pressure plate, the positioning plate and the split loading plate into an integrated disassembly tooling by connecting bolts and nuts, and then push the tooling to move to one side along the spacer and put the short disassembly bolts 3 into the semicircular through holes of the test shaft shoulder 11; 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; 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 inner ring 2 of the bearing to be disassembled, and continue to push the disassembly tool to move until the inner ring 2 of the bearing to be disassembled is completely separated from the test shaft, as shown in FIG. Figure 6 shown.

[0030] In step one, a number of 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 assembled at the same time 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 inner ring of the small bearing during the disassembly process.

[0031] In step one, in order to stably clamp the loading plate, a circular groove having a shape matching that of the loading plate can be processed on the clamping surfaces of the disassembly pressure plate and the positioning plate respectively.

[0032] The parts not described in detail in this embodiment are prior art.

[0033] It should be noted that although the present invention is described by the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope of protection of 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: Here are the steps: S1. Screw several short disassembly bolts into the threaded holes of the two semicircular loading plates respectively, then clamp the two semicircular loading plates on the spacer, clamp the disassembly pressure plate and the positioning plate on both sides of the loading plate, and use the locking parts to form an integrated disassembly tool with the disassembly pressure plate, the positioning plate and the two semicircular loading plates, then push the tool to move to one side along the spacer and put the short disassembly bolts into the semicircular through holes on the test shaft shoulder; S2. Continue to apply force to the disassembly tool. After the short disassembly bolt is subjected to force, it pushes 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 tool is against the shoulder of the test shaft. S3. Then move the disassembly tool away from the shoulder of the test shaft, remove the short disassembly bolt, screw the long disassembly bolt into the threaded hole of the loading plate, apply force to the disassembly tool again, the long disassembly bolt moves and contacts the end face of the inner ring of the bearing to be disassembled, and continue to push the disassembly tool until the inner ring of the bearing to be disassembled is completely separated from the test shaft.

2. A method for disassembling a small bearing inner ring according to claim 1, characterized in that: In step S1, a number of disassembly bolts are evenly distributed on two semicircular loading plates to balance the stress on the inner ring of the bearing during disassembly, and the number of disassembly bolts is the same as the number of semicircular through holes on the shoulder of the test shaft.

3. The method for disassembling the inner ring of a small bearing according to claim 1, characterized in that: In step S1, a circular groove having a shape matching that of the loading plate is processed on the clamping surfaces of the disassembly pressing plate and the positioning plate respectively to stably clamp the loading plate.

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

5. The disassembly tool according to claim 4, characterized in that: The loading plate is formed by splicing two semicircular plates.

6. The disassembly tool according to claim 4, characterized in that: 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 disassembly tool according to claim 6, characterized in that: 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 tool according to claim 4, characterized in that: Circular grooves are correspondingly arranged on the clamping surfaces of the disassembly pressing plate and the positioning plate, and the shape of the grooves is adapted to the shape of the loading plate.

9. The disassembly tool according to claim 4, characterized in that: The disassembly pressing plate and the positioning plate are respectively provided with mounting holes for mounting locking members at their outer edges relative to the spacer.

10. The disassembly tool according to claim 9, characterized in that: The disassembly pressing plate and the positioning plate are fastened to the two sides of the loading plate by arranging connecting bolts and nuts in the mounting holes.

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