Light and small precise rotating shaft dismounting device

Abstract

The utility model relates to the technical field of bearing assembly, and provides a light and small precise rotating shaft dismounting device which comprises an outer shell, a bearing seat, an annular cover body, a heat insulation piece, an adjusting block and an ejection assembly, the end part of one end of the outer shell is arranged in a sinking table type, and a through hole part and a mounting part which are communicated with each other are formed; the bearing seat is arranged on the mounting part, the inner end part of the bearing seat extends from the mounting part to the direction of the through hole part, and the inner end part of the bearing seat is in interference connection with the outer ring of the bearing; the inner edge part of the annular cover body is concaved inwards in the direction towards the through hole part to form a heating cavity, and a preset distance t is formed between the inner edge part and the bearing; the heat insulation piece is arranged between the annular cover body and the bearing seat; the adjusting block is arranged between the outer edge part of the annular cover body and the outer shell; the ejection assembly abuts against one end of the rotating shaft through an inner opening of the annular cover body. The temperature range needed in the rotating shaft and bearing dismounting process is continuously maintained, and the rotating shaft and bearing dismounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing assembly, in particular to a light and small precision shaft disassembly device. Background Art

[0002] Since the design of light and small precision shaft systems usually requires interference fit between the shaft and the bearing, the shaft and the inner ring of the bearing need to be heated and separated when the shaft is disassembled. Usually, the shaft and the bearing are placed in an oven together for overall heating, or the shaft and the bearing are fixed on a simple tooling and heated directly.

[0003] However, although heating in an oven can evenly heat the shaft and bearings and accurately control the heating temperature, there will be a lot of heat loss in the process of removing the shaft and bearings and installing them on the tooling after heating. It is difficult to accurately control the heating temperature and it is difficult to evenly heat the disassembly parts by directly heating the shaft and bearing surfaces with a hot air gun on a simple tooling. In addition, it is necessary to repeat the heating and disassembly many times, which is time-consuming and laborious. Utility Model Content

[0004] The utility model provides a light and small precision shaft disassembly device, which is used to solve the technical defects in the prior art that the temperature of the shaft and bearing disassembly process is difficult to maintain and control, resulting in low disassembly efficiency, and achieves continuous maintenance of the temperature range required for the shaft and bearing disassembly process, thereby improving the disassembly efficiency of the shaft and bearing.

[0005] The utility model provides a light and small precision shaft disassembly device, comprising:

[0006] An outer shell, wherein an end portion of one end of the outer shell is arranged in a sunken platform type, and is formed with a through hole portion and a mounting portion that are interconnected;

[0007] A bearing seat, wherein the bearing seat is arranged on the mounting portion, an inner end portion of the bearing seat extends from the mounting portion toward the through hole portion, and the inner end portion of the bearing seat is interference connected with the outer ring of the bearing;

[0008] an annular cover body, the annular cover body covers a side of the mounting portion away from the through hole portion, the outer edge of the annular cover body abuts against the outer shell, the inner edge of the annular cover body is concave inwardly toward the through hole portion to form a heating cavity, and a preset distance t is spaced between the inner edge and the bearing;

[0009] A heat insulating member, the heat insulating member being arranged between the annular cover and the bearing seat;

[0010] An adjustment block, the adjustment block is arranged between the outer edge of the annular cover body and the outer shell;

[0011] The ejector assembly is installed on a side of the annular cover body away from the outer shell, and the ejector assembly abuts against one end of the rotating shaft through the inner opening of the annular cover body.

[0012] According to a light and small precision shaft disassembly device provided by the utility model, the light and small precision shaft disassembly device also includes a temperature measuring module. A connecting port is provided on the peripheral wall surface of the outer shell corresponding to the through hole portion, and the temperature measuring module is installed close to one end of the shaft connected to the bearing through the connecting port.

[0013] According to a light and small precision shaft disassembly device provided by the utility model, the light and small precision shaft disassembly device also includes a cushion block, and the cushion block is arranged at one end of the shaft abutting against the ejection assembly.

[0014] According to a light and small precision shaft disassembly device provided by the utility model, the ejection assembly includes a support rod and a push rod, the support rod is laterally arranged on one side of the heating chamber and is connected to the annular cover body, the push rod is extended along the axial direction of the outer shell, and the push rod is threadedly connected to the support rod.

[0015] According to a light and small precision shaft disassembly device provided by the utility model, the light and small precision shaft disassembly device also includes a cover plate, and the cover plate is arranged to cover an end of the through hole portion away from the installation cavity.

[0016] According to a light and small precision shaft disassembly device provided by the utility model, the light and small precision shaft disassembly device also includes a buffer component, which is arranged in the through hole portion and abuts between the cover plate and the shaft.

[0017] According to a light and small precision shaft disassembly device provided by the utility model, the adjustment block is a polyimide adjustment block.

[0018] According to a light and small precision shaft disassembly device provided by the utility model, an end portion of the outer shell away from the annular cover body is provided with a seat portion protruding radially outward.

[0019] According to a light and small precision shaft disassembly device provided by the utility model, an outer peripheral wall of the bearing seat in the axial direction is spaced apart from an inner wall of the outer shell.

[0020] According to a light and small precision shaft disassembly device provided by the utility model, the heat insulating member is any one of glass fiber reinforced plastics, asbestos, ceramics or aerogel. The light and small precision shaft disassembly device provided by the utility model strictly controls the pre-test distance t between the inner edge of the annular cover and the bearing by setting an adjustment block between the outer edge of the annular cover and the outer shell, and at the same time, by setting a heat insulating member between the annular cover and the bearing seat, it can effectively block the heat from being transferred to the bearing seat, thereby continuously maintaining the temperature range required for the shaft and bearing disassembly process, improving the disassembly efficiency of the shaft and the bearing, and can safely protect the machining accuracy of the bearing seat during the disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of a light and small precision shaft disassembly device provided by the utility model;

[0023] Figure 2 yes Figure 1 A longitudinal section view of a small to medium precision shaft disassembly device;

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0025] Reference numerals:

[0026] 10. Light and small precision shaft disassembly device;

[0027] 100, outer shell; 110, through hole portion; 120, mounting portion; 130, communication port; 140, seat portion;

[0028] 200, bearing seat;

[0029] 300, annular cover; 310, outer edge; 320, inner edge; 330, heating chamber; 340, inner opening;

[0030] 400, thermal insulation;

[0031] 500, adjustment block;

[0032] 600, ejector assembly; 610, support rod; 620, ejector rod;

[0033] 700, temperature measurement module;

[0034] 800, pad;

[0035] 900, cover plate;

[0036] 20. Buffer parts;

[0037] 30. Rotating shaft;

[0038] 40. Bearings. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0042] The utility model provides a light and small precision shaft disassembly device.

[0043] In the embodiment of the present utility model, Figure 1 to Figure 2As shown, the light and small precision shaft disassembly device 10 includes an outer shell 100, a bearing seat 200, an annular cover 300, a heat insulating member 400, an adjustment block 500 and an ejection assembly 600. The end of one end of the outer shell 100 is arranged in a sunken table type, forming a through hole portion 110 and a mounting portion 120 that are interconnected; the bearing seat 200 is arranged on the mounting portion 120, and the inner end portion of the bearing seat 200 extends from the mounting portion 120 toward the through hole portion 110, and the inner end portion of the bearing seat is interference connected with the outer ring of the bearing; the annular cover 300 covers the side of the mounting portion 120 away from the through hole portion 110, and the annular cover The outer edge portion 310 of the body 300 abuts against the outer shell 100, and the inner edge portion 320 of the annular cover body 300 is concave inward toward the through hole portion 110 to form a heating chamber 330, and the inner edge portion 320 and the bearing 40 are spaced apart by a preset distance t; the heat insulating member 400 is arranged between the annular cover body 300 and the bearing seat 200; the adjustment block 500 is arranged between the outer edge portion 310 of the annular cover body 300 and the outer shell 100; the ejection assembly 600 is installed on the side of the annular cover body 300 away from the outer shell 100, and the ejection assembly 600 abuts against one end of the rotating shaft 30 through the inner opening 340 of the annular cover body 300.

[0044] The sunken platform design at one end of the outer shell 100 not only enhances the structural stability, but also facilitates the installation of other components, making the entire device more compact and orderly. The through hole portion 110 serves as a passage for the rotating shaft 30 to pass through, ensuring the smooth movement of the rotating shaft 30 during disassembly; the mounting portion 120 is used to fix the bearing seat 200, and its reasonable design ensures the stability of the bearing seat 200 during disassembly.

[0045] The bearing seat 200 is a key component for supporting the bearing 40. Its structural design can evenly distribute the load of the bearing 40 and maintain the stability of the bearing 40 during the disassembly process. The inner end of the bearing seat is interference-connected with the outer ring of the bearing 40 to facilitate the disassembly of the rotating shaft 30 and the bearing 40.

[0046] The close fit between the annular cover 300 and the mounting portion 120 ensures the sealing of the heating space, facilitates the accumulation and retention of heat, and improves the heating efficiency. The design of the heating chamber 330 allows the heat to be concentrated on the contact part between the rotating shaft 30 and the bearing 40, which speeds up the disassembly process. At the same time, its structure also facilitates the uniform distribution of heat and avoids local overheating.

[0047] Precise control of the preset distance t is the key to ensure the disassembly effect. The adjusting block 500 can adapt to the rotating shaft 30 and the bearing 40 of different specifications and materials. The gap t is designed to be a fixed value, so as to prevent heat from being transferred to the bearing seat 200.

[0048] The heat insulating member 400 is disposed between the annular cover body 300 and the bearing seat 200 . The heat insulating member 400 serves as a barrier layer for heat transfer. Its material and thickness are carefully selected and designed, which can effectively reduce the transfer of heat to the bearing seat 200 and protect the stability and service life of the bearing seat 200 .

[0049] The adjustment block 500 is disposed between the outer edge 310 of the annular cover body 300 and the outer shell 100. The design of the adjustment block 500 allows the distance between the annular cover body 300 and the bearing 40 to be within a predetermined value, thereby reducing the heat transfer between the annular cover body 300 and the bearing seat 200. At the same time, it also allows the device to adapt to rotating shafts 30 and bearings 40 of different sizes and shapes, thereby improving the versatility and flexibility of the device.

[0050] The ejection assembly 600 is installed on the side of the annular cover body 300 away from the outer shell 100. By abutting against one end of the rotating shaft 30, the ejection assembly 600 can smoothly push out the rotating shaft 30 during the disassembly process, avoiding the tediousness and uncertainty of manual operation and improving the disassembly efficiency and safety.

[0051] The utility model provides a light and small precision shaft disassembly device 10, which strictly controls the preliminary distance t between the inner edge 320 of the annular cover body 300 and the bearing 40 by setting an adjustment block 500 between the outer edge 310 of the annular cover body 300 and the outer shell 100, and at the same time effectively blocks the heat from being transferred to the bearing seat 200 by setting a heat insulating member 400 between the annular cover body 300 and the bearing seat 200, thereby continuously maintaining the temperature range required for the disassembly process of the shaft 30 and the bearing 40, improving the disassembly efficiency of the shaft 30 and the bearing 40, and safely protecting the machining accuracy of the bearing seat 200 during the disassembly process.

[0052] Reference Figure 1 and Figure 2 According to a light and small precision shaft disassembly device 10 provided by the utility model, the light and small precision shaft disassembly device 10 also includes a temperature measuring module 700. A connecting port 130 is provided on the peripheral wall surface of the outer shell 100 corresponding to the through hole portion 110. The temperature measuring module 700 is installed close to one end of the shaft 30 connected to the bearing 40 through the connecting port 130.

[0053] It is understandable that the temperature measurement module 700 can be used to monitor the temperature changes of related components during the disassembly process to ensure that the operation is within a suitable temperature range. Through the connecting port 130, the temperature measurement module 700 can easily approach the position where the shaft 30 is connected to the bearing 40, and monitor the temperature of the area in real time. The operator can adjust the heating intensity and time according to the real-time data provided by the temperature measurement module 700 to ensure that the disassembly process is always carried out within a suitable temperature range, thereby improving the efficiency and success rate of disassembly. At the same time, precise temperature control also helps to protect the bearing seat 200 and other related components and extend their service life.

[0054] Reference Figure 2 and Figure 3 According to a light and small precision shaft disassembly device 10 provided by the utility model, the light and small precision shaft disassembly device 10 also includes a cushion block 800, and the cushion block 800 is arranged at one end of the shaft 30 abutting against the ejection assembly 600.

[0055] It is understandable that the pad 800 can be used to increase the contact area between the rotating shaft 30 and the ejection assembly 600, disperse the pressure during ejection, and prevent the rotating shaft 30 from being damaged during the disassembly process. In addition, the pad 800 can also provide a certain buffering effect, reduce the impact of the ejection assembly 600 on the rotating shaft 30, and protect the integrity of the rotating shaft 30. At the same time, the pad 800 can have a certain heat insulation ability to prevent the heat of the rotating shaft 30 from being transmitted to the ejection assembly 600 and lost after being heated.

[0056] The material of the pad 800 can be selected according to the material of the rotating shaft 30 and the disassembly requirements to ensure that it has good thermal insulation, wear resistance, pressure resistance and high temperature resistance. Common materials of the pad 800 include high temperature resistant rubber, metal or composite materials. Selecting an appropriate material of the pad 800 can further improve the disassembly efficiency and protect the rotating shaft 30.

[0057] Reference Figures 1 to 3 According to a light and small precision shaft disassembly device 10 provided by the utility model, the ejection assembly 600 includes a support rod 610 and a push rod 620. The support rod 610 is laterally arranged on one side of the heating chamber 330 and is connected to the annular cover body 300. The push rod 620 is extended along the axial direction of the outer shell 100, and the push rod 620 is threadedly connected to the support rod 610.

[0058] It is understandable that the ejection assembly 600 is a key part of the disassembly device, which is used to smoothly eject the heated rotating shaft 30 from the bearing 40. The support rod 610 is a fixed part of the ejection assembly 600, which is horizontally arranged on one side of the heating chamber 330 and connected to the annular cover body 300. It plays the role of fixing the entire ejection assembly 600 to ensure that no shaking or deviation occurs during the ejection process. The ejector rod 620 is a movable part in the ejection assembly 600, which is extended along the axial direction of the outer shell 100. The ejector rod 620 acts on the rotating shaft 30 and ejects the rotating shaft 30 by applying a thrust. The threaded pair between the ejector rod 620 and the support rod 610 adopts a fine-pitch thread connection to ensure uniform thrust and controllable feed amount of the ejector rod 620 during the disassembly process, thereby reducing the risk of excessive stress.

[0059] Reference Figure 2 According to a light and small precision shaft disassembly device 10 provided by the utility model, the light and small precision shaft disassembly device 10 also includes a cover plate 900, and the cover plate 900 is covered at one end of the through hole portion 110 away from the installation cavity.

[0060] It is understandable that the through hole portion 110 serves as a passage through which the rotating shaft 30 passes. When a disassembly operation is required, the operator can conveniently open the cover plate 900, take out the disassembled rotating shaft 30 through the through hole portion 110, and then cover the cover plate 900 after the operation is completed to achieve the closure and protection of the through hole portion 110. The design of the cover plate 900 may also help maintain the overall structural integrity of the device and provide additional support and protection. After the disassembly operation is completed, the cover plate 900 can effectively close the through hole portion 110 to ensure the normal operation and safe use of the device.

[0061] Reference Figure 1 to Figure 2 According to a light and small precision shaft disassembly device 10 provided by the utility model, the light and small precision shaft disassembly device 10 also includes a buffer member 20, the buffer member 20 is arranged in the through hole portion 110, and the buffer member 20 abuts between the cover plate 900 and the shaft 30.

[0062] It can be understood that, in this embodiment, by providing a buffer 20 between the cover plate 900 and the shaft 30, the shaft 30 can be prevented from falling suddenly during the disassembly process, thereby achieving effective protection after the shaft 30 and the bearing 40 are separated. The buffer 20 can be a buffer spring or a buffer cotton, and the buffer spring is selected to have a small elastic coefficient and a large stroke.

[0063] Optionally, the adjustment block 500 is a polyimide adjustment block 500. It is understandable that polyimide is a high-performance engineering plastic with excellent heat resistance, chemical stability and mechanical strength. Selecting polyimide as the material of the adjustment block 500 may help improve the durability, stability and reliability of the device. Of course, in other embodiments, the adjustment block 500 may also be a polyetheretherketone adjustment block 500, a polycarbonate adjustment block 500 or a polymethyl methacrylate adjustment, etc., which is not specifically limited here.

[0064] Reference Figure 1 and Figure 2 According to a light and small precision shaft disassembly device 10 provided by the utility model, an end portion of the outer shell 100 away from the annular cover 300 is provided with a seat portion 140 protruding radially outward.

[0065] It is understandable that the arrangement of the seat portion 140 increases the stability and support of the end of the outer shell 100 away from the annular cover 300. Since the seat portion 140 protrudes radially outward, it can provide a larger contact area and support force, making the entire disassembly device more stable when placed or used, and not easy to tip over or shake. This helps to ensure the accuracy and safety of the disassembly operation and avoid accidents caused by unstable devices.

[0066] Reference Figure 3 According to a light and small precision shaft disassembly device 10 provided by the utility model, the outer peripheral wall of the bearing seat 200 in the axial direction is spaced apart from the inner wall of the outer shell 100 .

[0067] It is understandable that by setting the outer peripheral wall of the bearing seat 200 in the axial direction and the inner wall of the outer shell 100 at a distance, the contact area between the bearing seat 200 and the outer shell 100 can be reduced, thereby reducing the heat transferred to the outer shell 100 through the bearing seat 200, further improving the heat preservation capacity of the bearing 40 and the rotating shaft 30, and preventing the heat from dissipating quickly. At the same time, the interval setting can also reduce the precision requirements of the disassembly device during the manufacturing and assembly process. Since the bearing seat 200 and the outer shell 100 do not need to be completely fitted, a certain manufacturing error and assembly deviation can be tolerated, reducing the production cost and difficulty.

[0068] Optionally, the thermal insulation member 400 is any one of fiberglass, asbestos, ceramic or aerogel. It is understandable that the thermal insulation member in the present application is to prevent heat transfer and effectively protect the bearing seat from thermal shock and deformation, thereby affecting its structural accuracy. Among them, fiberglass has good mechanical properties and corrosion resistance, and is light in weight, and has good insulation and thermal insulation properties. Asbestos has excellent thermal insulation and high temperature resistance, and is suitable for thermal insulation protection in high temperature environments. Ceramic materials generally have good wear resistance and high temperature resistance, and are suitable for some occasions with high requirements for wear resistance and high temperature resistance. Aerogel is widely used in the field of thermal insulation due to its ultra-low density and excellent thermal insulation properties, and is suitable for occasions requiring light weight and good thermal insulation effects.

[0069] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A light and small precision shaft disassembly device, characterized in that: include: An outer shell, wherein an end portion of one end of the outer shell is arranged in a sunken platform type, and is formed with a through hole portion and a mounting portion that are interconnected; A bearing seat, wherein the bearing seat is arranged on the mounting portion, an inner end portion of the bearing seat extends from the mounting portion toward the through hole portion, and the inner end portion of the bearing seat is interference connected with the outer ring of the bearing; an annular cover body, the annular cover body covers a side of the mounting portion away from the through hole portion, the outer edge of the annular cover body abuts against the outer shell, the inner edge of the annular cover body is concave inwardly toward the through hole portion to form a heating cavity, and a preset distance t is spaced between the inner edge and the bearing; A heat insulating member, the heat insulating member being arranged between the annular cover and the bearing seat; An adjustment block, the adjustment block is arranged between the outer edge of the annular cover body and the outer shell; The ejector assembly is installed on a side of the annular cover body away from the outer shell, and the ejector assembly abuts against one end of the rotating shaft through the inner opening of the annular cover body.

2. The light and small precision shaft disassembly device according to claim 1 is characterized in that: The light and small precision shaft disassembly device also includes a temperature measuring module. A communication port is provided on the peripheral wall surface of the outer shell corresponding to the through hole portion. The temperature measuring module is installed close to one end of the shaft connected to the bearing through the communication port.

3. The light and small precision shaft disassembly device according to claim 1 is characterized in that: The light and small precision rotating shaft disassembly device also includes a cushion block, which is arranged at one end of the rotating shaft abutting against the ejection assembly.

4. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: The ejection assembly includes a support rod and a push rod. The support rod is transversely arranged on one side of the heating chamber and connected to the annular cover body. The push rod is extended along the axial direction of the outer shell, and the push rod is threadedly connected to the support rod.

5. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: The light and small precision shaft disassembly device further comprises a cover plate, and the cover plate is arranged to cover an end of the through hole portion away from the mounting portion.

6. The light and small precision shaft disassembly device according to claim 5, characterized in that: The light and small precision shaft disassembly device further comprises a buffer member, which is arranged in the through hole portion and abuts between the cover plate and the shaft.

7. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: The adjustment block is a polyimide adjustment block.

8. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: The end portion of the outer shell away from the annular cover body protrudes radially outward and is provided with a seat body portion.

9. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: An outer peripheral wall of the bearing seat in the axial direction is spaced apart from an inner wall of the outer shell.

10. The light and small precision shaft disassembly device according to any one of claims 1 to 3, characterized in that: The heat insulating member is any one of glass fiber reinforced plastics, asbestos, ceramics or aerogel.

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