Power device disassembling tool

Abstract

The utility model relates to the technical field of power device disassembling assistive devices, in particular to a power device disassembling tool which mainly comprises a base and a fixing ring which cooperatively provide support and fixation for a power device needing to be disassembled. A cylindrical cavity matched with a power device to be disassembled in diameter and depth is formed in the base and used for containing the power device to achieve preliminary positioning. The base is further provided with a supporting column. The guide rod is in sliding connection with the fixing ring and provides guide and support for movement of the fixing ring; the fixing ring is arranged to be of a turnover structure, and the two faces of the power device are disassembled by turning over the fixing ring. The tool effectively solves the problems that when the power device is fixed manually, stability is poor, accuracy is low, and product damage is prone to being caused, meanwhile, the conditions that when multiple persons work cooperatively, errors are many, and efficiency is low are improved, it is practically guaranteed that the power device is disassembled safely and efficiently, and operation quality is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for disassembling power devices, specifically to a tooling for disassembling power devices. Background Technology

[0002] In the engine power system architecture of underwater vehicles, a certain type of power unit consists of multiple components. Precise energy control is achieved through controllable valves, making it a key component ensuring the stable and efficient operation of the underwater vehicle's engine. Due to its operation in a high-pressure, high-humidity underwater environment, this power unit has stringent requirements regarding performance, reliability, and especially sealing performance. Any performance defects or sealing failures can lead to serious consequences, affecting the safe operation of the underwater vehicle. After completing the power unit's testing, the post-test processing phase begins. Operators must disassemble, clean, and polish the power unit sequentially to prevent rust and corrosion, remove residual unburned materials, avoid performance degradation, and ensure it meets usage standards. During power unit operation, to address the potential loosening and detachment of components due to high-intensity vibrations, each fastener and screw is configured with strict torque specifications, with a maximum torque value of 46N. Furthermore, the complex internal structure and numerous components of the power unit make disassembly time-consuming and place a heavy workload on the operators.

[0003] Meanwhile, the fuel carried by the power unit, as well as the gasoline and alcohol used for cleaning, are corrosive and have a strong pungent odor. To ensure the safety of the operators, they must wear full protective clothing and gas masks during operations, which further increases the workload and operational difficulty. During disassembly, due to the lack of effective fixing methods and suitable tooling, it currently relies mainly on two people working together: one to stabilize the power unit and the other to disassemble it. However, because the disassembly torque is large, it is easy to use excessive force during operation, making it difficult for the fixing personnel to stabilize the power unit, resulting in frequent bumps and scratches, seriously threatening the sealing performance of the power unit. Once the seal fails, it will greatly reduce the overall performance of the power unit and even the underwater vehicle.

[0004] Overall, there are two major problems in the current dismantling of power units:

[0005] 1. Currently, relying on operators to hold the power unit with their hands lacks the stability and precision of mechanical fixation, making it difficult to handle complex and challenging disassembly operations. In addition, the power unit fixing components and screws require high torque, up to 46N. During disassembly, it is difficult for operators to apply even and stable force with their hands. The instantaneous impact force generated by excessive force can easily cause the manually fixed device to slide or shift, resulting in product damage.

[0006] 2. The dismantling work requires 2 to 3 people to complete, increasing labor costs. Different operators have differences in strength control and movement rhythm, making seamless coordination difficult. Furthermore, the need to wear protective clothing and gas masks creates communication barriers, further increasing the difficulty of coordination, making operational errors more likely, and affecting dismantling efficiency and quality.

[0007] Therefore, it is necessary to develop a safe, reliable, efficient and labor-saving method for disassembling power components. This would solve the problems of errors caused by multiple people working together and product damage due to the lack of fixed means in the current disassembly mode, improve work efficiency, ensure product quality, and provide strong support for the research and development and maintenance of power devices. Summary of the Invention

[0008] To address the shortcomings of the existing technology, this utility model provides a power device disassembly fixture. This fixture, through the coordinated operation of a base and a retaining ring, provides support and fixation for the power device to be disassembled. The retaining ring is designed with a flip-up structure, facilitating disassembly of the power device from both sides.

[0009] This tooling effectively solves the problems of poor stability and low accuracy when manually fixing power devices, which can easily cause product damage. It also improves the situation of many errors and low efficiency when multiple people work together, effectively ensuring the safe and efficient disassembly of power devices and greatly improving the quality of work.

[0010] Specifically, this utility model provides a power device disassembly fixture, including a base and a fixing ring, which work together to provide support and fixation for the power device to be disassembled;

[0011] The base has a cylindrical cavity that matches the diameter and depth of the power device to be disassembled, which is used to place the power device for initial positioning.

[0012] The base is also provided with a support column; it is slidably connected to the fixed ring, providing guidance and support for the movement of the fixed ring;

[0013] The fixing ring is designed to be flipped, allowing for the disassembly of the two sides of the power unit by flipping the fixing ring.

[0014] Furthermore, the fixing ring is a hollow cylindrical structure with a diameter consistent with that of the power unit partition, and is used to install the power unit that needs to be disassembled.

[0015] Furthermore, the base is provided with two support columns, which are perpendicular to the placement plane of the base. The two support columns are symmetrically distributed on opposite sides of the base with the geometric center of the base as the symmetrical point, providing stable support and precise guidance for the fixing ring.

[0016] Furthermore, the support column is provided with a sliding groove, through which the support column achieves a sliding connection with the fixing ring.

[0017] Furthermore, the outer ring of the fixing ring is provided with two limiting balls, the outer diameter of which is adapted to the sliding groove on the support column, and each limiting ball is embedded in the corresponding sliding groove;

[0018] The limiting ball can slide within the groove along the vertical direction of the support column;

[0019] When the fixed ring is flipped, the limiting ball moves in an arc within the groove, based on the plane parallel to the base, and rotates around the axis of the support column. Because the limiting ball is rigidly connected to the fixed ring, its arc movement drives the fixed ring to flip synchronously, making the fixed ring movable or flippable, thus adapting to the needs of flipping the power unit and disassembling parts with different lengths on two sides.

[0020] Furthermore, the fixing ring has a through hole, which corresponds to the connection hole on the power device partition. A fixing screw passes through the through hole and is connected to a fixing nut. After the fixing screw passes through the through hole of the fixing ring and the connection hole on the power device partition in sequence, the fixing nut is tightened to fix the power device on the fixing ring.

[0021] Furthermore, a lifting ring is fixedly connected to one end of the fixing screw, and the other end is threadedly connected to a fixing nut; when the lifting ring is gripped and force is applied, the force is transmitted to the fixed ring connected to it through the fixing screw, so that the fixed ring can slide along the groove on the support column or rotate around the axis of the support column, thereby conveniently adjusting the position and angle of the fixed ring to meet the disassembly requirements of different sides of the power device.

[0022] Furthermore, the cylindrical cavity within the base is provided with a base support; when the base support abuts against the lifting ring or fixing screw, the supporting force of the base support is transmitted to the fixing ring through the lifting ring or fixing screw, thereby suspending the power device fixed on the fixing ring in the cylindrical cavity, keeping its bottom surface at a distance from the bottom of the cylindrical cavity, and preventing the power device components from directly contacting and being damaged by the bottom of the cylindrical cavity during disassembly.

[0023] Working principle: When the power unit disassembly tooling is working, in the initial state, the limiting ball 21 of the outer ring of the fixed ring 2 is embedded in the sliding groove 12 of the support column 11 on the base 1, and the two form a sliding connection relationship.

[0024] The operator holds the lifting ring 24 at the end of the fixing screw 22 and applies force to flip the fixing ring 2 using the fixed connection between the lifting ring 24 and the fixing screw 22. At this time, the limiting ball 21 moves in an arc within the slide groove 12 with the plane parallel to the base 1 as a reference, and rotates around the axis of the support column 11, causing the fixing ring 2 to flip to the position where the fixing screw 22 faces upward; a downward force is applied to the fixing ring 2, and the limiting ball 21 on the fixing ring 2 slides downward within the slide groove 12 of the support column 11 until the lifting ring 24 abuts against the base support 13, providing support for the fixing ring 2; then the fixing nut 23 on the fixing screw 22 is removed.

[0025] Next, the power unit to be disassembled is moved to the tooling area, with the short shaft power transmission column of the power unit facing downwards. The connecting hole on the power unit partition is aligned with the through hole of the fixing ring 2. Then, the fixing screw 22 is passed through the connecting hole of the power unit partition, and the fixing nut 23 is tightened to securely fix the power unit to the fixing ring 2, ensuring that the power unit will not shift during subsequent disassembly. At this time, since the top of the lifting ring 24 abuts against the base support 13 in the cylindrical cavity 14 inside the base 1, the short shaft power transmission column of the power unit fixed on the fixing ring 2 is suspended in the cylindrical cavity 14, maintaining a certain distance between the components on this surface and the bottom of the cylindrical cavity 14 to prevent damage to the components.

[0026] After the power unit is secured, the operator can begin disassembling the upward-facing long-shaft power transmission column components. After disassembly, the operator grasps the lifting ring 24 and pulls it upwards. At this time, the limiting ball 21 on the fixing ring 2 slides upwards within the groove 12 of the support column 11, causing the fixing ring 2, which holds the power unit, to move upwards, thus disengaging the components of the short-shaft power transmission column from the cylindrical cavity 14. Then, the fixing ring 2 is flipped so that the components of the short-shaft power transmission column face upwards, and a downward force is applied to the fixing ring 2 again. The limiting ball 21 on the fixing ring 2 slides downwards within the groove 12 of the support column 11 until the fixing screw 22 abuts against the base support 13 to form support. The operator can then proceed with disassembling the upward-facing short-shaft power transmission column components.

[0027] After the disassembly of the short shaft power transmission cylinder is completed, grasp the lifting ring 24 again and pull it upward. The fixing ring 2 drives the power unit to move, causing the other side that was originally facing down to flip upward and apply downward force, so that the lifting ring 24 abuts against the base support 13 to form support. The operator loosens the fixing nut 23 to remove the partition of the power unit from the fixing screw 22 to prepare for the subsequent cleaning process.

[0028] Operators can use the same method and appropriate tools to disassemble the components facing upwards. After disassembly, the components can be flipped to the other side until the disassembly of the entire power unit is completed.

[0029] Beneficial effects:

[0030] 1. This utility model uses a base and a fixing ring to form a tooling, providing stable support and fixation for the power device. The cylindrical cavity inside the base is adapted to the size of the power device, allowing for quick positioning and improving the efficiency of pre-disassembly preparation.

[0031] 2. The limiting ball on the outer ring of the fixed ring of this utility model is adapted to the sliding groove of the support column, enabling the fixed ring to move and rotate. The sliding of the limiting ball ensures the vertical and stable movement of the fixed ring, and when rotating, it drives the fixed ring to rotate synchronously, expanding the applicability of the tooling to various power devices and improving the versatility and flexibility of disassembly.

[0032] 3. The two symmetrical support columns on the base of this utility model provide stable support and precise guidance for the fixing ring. The sliding groove and the limiting ball cooperate to ensure that the fixing ring slides and flips smoothly, avoids displacement and jamming, and ensures smooth disassembly operations of the power device at different positions and angles.

[0033] 4. The fixing ring through hole of this utility model corresponds to the connection hole of the power unit partition plate. With the help of fixing screws and fixing nuts, the power unit can be easily and firmly fixed. Tightening the nut fixes the device, and loosening it releases it, making the operation convenient and quick.

[0034] 5. The base support platform inside the cylindrical cavity of this utility model plays a crucial protective role during disassembly. It abuts against the lifting ring or fixing screw, allowing the power unit to be suspended, maintaining a safe distance between its bottom surface and the bottom of the cavity, reducing the risk of equipment damage, decreasing maintenance costs, and extending the service life of the power unit.

[0035] 6. The lifting ring of this utility model provides a force application point for the operator, playing a supporting role in operation. After the power unit is fixed, the fixing ring descends until the lifting ring abuts against the base platform. The lifting ring transfers the supporting force to the fixing ring, suspending the power unit and preventing its components from contacting and being damaged by the bottom of the cylindrical cavity. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model;

[0037] Figure 2 This is a schematic diagram showing the disassembled parts of this utility model;

[0038] Figure 3 This is a schematic diagram showing the connection between the fixing ring and the power device of this utility model;

[0039] Figure 4 This is one of the schematic diagrams showing the working state of the power device of this utility model after disassembly;

[0040] Figure 5 This is a schematic diagram of the fixed ring of this utility model sliding upwards during operation.

[0041] Figure 6 This is a schematic diagram of the fixed ring flipping working state of this utility model;

[0042] Figure 7 This is a schematic diagram of the downward sliding working state of the fixed ring of this utility model;

[0043] Figure 8 This is the second schematic diagram showing the disassembly and working state of the power device of this utility model;

[0044] Figure 9 This is a cross-sectional view of the long axis power transmission cylinder of this utility model after the tooling and power device are connected, with the cylinder facing upwards.

[0045] Figure 10 This is a cross-sectional view of the short-axis power transmission cylinder with the tooling and power device of this utility model connected, facing upwards.

[0046] The diagram labels are as follows: 1—base, 11—support column, 12—slide groove, 13—base support, 14—cylindrical cavity;

[0047] 2—Fixing ring, 21—Limiting ball, 22—Fixing screw, 23—Fixing nut, 24—Lifting ring;

[0048] 3—Power unit, 31—Baffle, 32—Long-axis power transmission column, 33—Short-axis power transmission column, 34—Long rectangular block, 35—Short rectangular block, 36—Baffle fixing bolt. Detailed Implementation

[0049] The technical solution will now be described in detail with reference to the accompanying drawings of the embodiments of this utility model.

[0050] Example 1

[0051] like Figure 1 , 2 As shown, a power device disassembly fixture includes: a base 1, a support column 11, a slide groove 12, a base platform 13, a cylindrical cavity 14, a fixing ring 2, a limiting ball 21, a fixing screw 22, a fixing nut 23, and a lifting ring 24; the base 1 and the fixing ring 2 work together to provide support and fixation for the power device 3 to be disassembled;

[0052] like Figure 2 As shown, the cylindrical cavity 14 is set inside the base 1 and is adapted to the diameter and depth of the power device 3 to be disassembled, and is used to place the power device 3 to achieve preliminary positioning.

[0053] like Figure 2 , 9As shown in Figure 10, the base support 13 is disposed in the cylindrical cavity 14 inside the base 1. When the base support 13 abuts against the lifting ring 24 or the fixing screw 22, the supporting force of the base support 13 is transmitted to the fixing ring 2 through the lifting ring 24 or the fixing screw 22, thereby suspending the power device 3 fixed on the fixing ring 2 in the cylindrical cavity 14, so that its bottom surface is kept at a distance from the bottom of the cylindrical cavity 14, preventing the power device 3 components from directly contacting the bottom of the cylindrical cavity 14 and being damaged during disassembly.

[0054] like Figure 2 As shown, two support columns 11 are provided above the base 1. The support columns 11 are perpendicular to the placement plane of the base 1. The two support columns 11 are symmetrically distributed on opposite sides of the base 1 with the geometric center of the base 1 as the symmetrical point, providing stable support and precise guidance for the fixing ring 2.

[0055] like Figure 2 As shown, the slide groove 12 is located inside the support column 11, and the support column 11 is slidably connected to the fixed ring 2 through the slide groove 12.

[0056] like Figure 3 As shown, the fixing ring 2 is a hollow cylindrical structure with a diameter that is the same as the diameter of the partition of the power unit 3, and is used to install the power unit 3 that needs to be disassembled.

[0057] like Figure 1 , 6 As shown, two limiting balls 21 are provided on the outer ring of the fixing ring 2. Their outer diameter is adapted to the sliding groove 12 on the support column 11, and each limiting ball 21 is embedded in the corresponding sliding groove 12. The limiting ball 21 can slide in the sliding groove 12 along the vertical direction of the support column 11. When the fixing ring 2 is flipped, the limiting ball 21 moves in an arc shape in the sliding groove 12 with the plane parallel to the base 1 as the reference, and rotates around the axis of the support column 11. Because the limiting ball 21 is rigidly connected to the fixing ring 2, its arc shape causes the fixing ring 2 to flip synchronously. This allows the fixing ring 2 to move or flip, thereby adapting to the needs of flipping the power device 3 and disassembling parts of different lengths on two surfaces.

[0058] like Figure 6 As shown, a lifting ring 24 is fixedly connected to one end of the fixing screw 22, and the other end is threadedly connected to the fixing nut 23. When the lifting ring 24 is gripped and force is applied, the force is transmitted through the fixing screw 22 to the fixed ring 2 connected to it, so that the fixed ring 2 can slide along the groove 12 on the support column 11 or rotate around the axis of the support column 11, thereby conveniently adjusting the position and angle of the fixed ring 2 to meet the disassembly requirements of different sides of the power device 3.

[0059] like Figure 3As shown, the fixing ring 2 has a through hole, which corresponds to the connection hole on the partition of the power device 3. The fixing screw 22 passes through the through hole. After the fixing screw 22 passes through the through hole of the fixing ring 2 and the connection hole on the partition of the power device 3 in sequence, the fixing nut 23 is tightened to fix the power device 3 on the fixing ring 2.

[0060] like Figure 4 , 6 As shown in Figures 7 and 8, when the power unit disassembly tooling is in operation, in the initial state, the limiting ball 21 of the outer ring of the fixing ring 2 is embedded in the sliding groove 12 of the support column 11 on the base 1, and the two form a sliding connection relationship.

[0061] The operator holds the lifting ring 24 at the end of the fixing screw 22 and applies force to flip the fixing ring 2 using the fixed connection between the lifting ring 24 and the fixing screw 22. At this time, the limiting ball 21 moves in an arc within the slide groove 12 with the plane parallel to the base 1 as a reference, and rotates around the axis of the support column 11, causing the fixing ring 2 to flip to the position where the fixing screw 22 faces upward; a downward force is applied to the fixing ring 2, and the limiting ball 21 on the fixing ring 2 slides downward within the slide groove 12 of the support column 11 until the lifting ring 24 abuts against the base support 13, providing support for the fixing ring 2; then the fixing nut 23 of the fixing screw 22 is removed.

[0062] Next, the power unit 3 to be disassembled is moved to the tooling area, with the short shaft power transmission column 33 of the power unit 3 facing downwards. The connecting hole on the partition 31 of the power unit 3 is precisely aligned with the through hole of the fixing ring 2. Then, the fixing screw 22 is passed through the connecting hole of the partition 31 of the power unit 3, and the fixing nut 23 is tightened to firmly fix the power unit 3 to the fixing ring 2, ensuring that the power unit 3 will not shift during subsequent disassembly. At this time, since the top of the lifting ring 24 abuts against the base support 13 in the cylindrical cavity 14 of the base 1, the short shaft power transmission column 33 of the power unit 3 fixed on the fixing ring 2 is suspended in the cylindrical cavity 14, so that the components on this surface are kept at a certain distance from the bottom of the cylindrical cavity 14 to prevent damage to the components.

[0063] Following the usual disassembly procedure, the components on the short shaft power transmission column 33 surface of the power unit 3 are usually disassembled first, and then the components on the long shaft power transmission column 32 surface are disassembled. This embodiment also follows this practice.

[0064] After securing the power unit 3, the operator holds the retaining ring 2 and pulls it upwards. At this time, the limiting ball 21 on the retaining ring 2 slides upwards within the groove 12 of the support column 11, causing the retaining ring 2, which holds the power unit 3, to move upwards, thus disengaging the components on the short-axis power transmission column 33 surface of the power unit 3 from the cylindrical cavity 14. Then, the retaining ring 2 is flipped so that the components on the short-axis power transmission column 33 surface face upwards. A downward force is applied to the retaining ring 2 again, causing the limiting ball 21 on the retaining ring 2 to slide downwards within the groove 12 of the support column 11 until the fixing screw 22 abuts against the base platform 13 to form support. At this point, the long-axis power transmission column 32 surface of the power unit 3 is suspended within the cylindrical cavity 14, with the components on this surface maintaining a distance from the bottom of the cylindrical cavity 14 to avoid damage. The operator can then disassemble the upward-facing components of the short-axis power transmission column 33.

[0065] After disassembling the short shaft power transmission column 33 of the power unit 3, grasp the lifting ring 24 again and pull upwards. The fixing ring 2 drives the power unit 3 to move, causing the side that was originally facing down to flip upwards. The components on the long shaft power transmission column 32 of the power unit 3 leave the cylindrical cavity 14. Then, flip it upwards and apply downward force so that the lifting ring 24 abuts against the base support 13 to form support. The operator can then disassemble the components on the long shaft power transmission column 32 of the power unit 3. After the components of the power unit 3 are disassembled, loosen the fixing nut 23 to remove the partition 31 of the power unit 3 from the fixing screw 22, preparing for the subsequent cleaning process.

[0066] This embodiment follows the conventional disassembly procedure. The operator can choose the disassembly steps and use the same method to disassemble the components facing upwards with the appropriate tools. After disassembly, the components are flipped to the other side until the disassembly of the entire power unit is completed.

[0067] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A power unit disassembly fixture, characterized in that: Including a base (1) and a retaining ring (2), which work together to provide support and fixation for the power unit that needs to be disassembled; The base (1) has a cylindrical cavity (14) that matches the diameter and depth of the power device to be disassembled, which is used to place the power device for initial positioning. The base (1) is also provided with a support column (11); it is slidably connected to the fixing ring (2) to provide guidance and support for the movement of the fixing ring (2); The fixing ring (2) is configured as a flip-up structure, and the two sides of the power device can be disassembled separately by flipping the fixing ring (2).

2. The power unit disassembly fixture according to claim 1, characterized in that: The fixing ring (2) is a hollow cylindrical structure with a diameter that is the same as the diameter of the power unit partition, and is used to install the power unit that needs to be disassembled.

3. The power unit disassembly fixture according to claim 2, characterized in that: The base (1) has two support columns (11). The support columns (11) are perpendicular to the placement plane of the base (1). The two support columns (11) are symmetrically distributed on opposite sides of the base (1) with the geometric center of the base (1) as the symmetrical point, providing support and guidance for the fixing ring (2).

4. The power unit disassembly fixture according to claim 3, characterized in that: The support column (11) is provided with a sliding groove (12), and the support column (11) is slidably connected to the fixing ring (2) through the sliding groove (12).

5. The power unit disassembly fixture according to claim 4, characterized in that: The outer ring of the fixed ring (2) is provided with two limiting balls (21), the outer diameter of which is adapted to the sliding groove (12) on the support column (11), and each limiting ball (21) is embedded in the corresponding sliding groove (12); The limiting ball (21) can slide within the groove (12) along the vertical direction of the support column (11); When the fixed ring (2) is flipped, the limiting ball (21) takes the plane parallel to the base (1) as the reference and moves in an arc in the slide (12), rotating around the axis of the support column (11). Because the limiting ball (21) is rigidly connected to the fixed ring (2), its arc movement drives the fixed ring (2) to flip synchronously; so that the fixed ring (2) can be moved or flipped, thereby adapting to the needs of flipping the power device and disassembling parts with different lengths on two sides.

6. The power unit disassembly fixture according to claim 5, characterized in that: The fixing ring (2) has a through hole, which corresponds to the connection hole on the power device partition. A fixing screw (22) is inserted through the through hole, and a fixing nut (23) is connected to the fixing screw (22). After the fixing screw (22) passes through the through hole of the fixing ring (2) and the connection hole on the power device partition in sequence, the fixing nut (23) is tightened, thereby fixing the power device on the fixing ring (2).

7. The power unit disassembly fixture according to claim 6, characterized in that: One end of the fixing screw (22) is fixedly connected to a lifting ring (24), and the other end is threadedly connected to a fixing nut (23). When the lifting ring (24) is held, the force is transmitted through the fixing screw (22) to the fixed ring (2) connected to it, so that the fixed ring (2) can slide along the groove (12) on the support column (11) or rotate around the axis of the support column (11), thereby conveniently adjusting the position and angle of the fixed ring (2) to meet the disassembly requirements of different sides of the power device.

8. The power unit disassembly fixture according to claim 7, characterized in that: The cylindrical cavity (14) inside the base (1) is provided with a base support (13); when the base support (13) abuts against the lifting ring (24) or the fixing screw (22), the supporting force of the base support (13) is transmitted to the fixing ring (2) through the lifting ring (24) or the fixing screw (22), thereby suspending the power device fixed on the fixing ring (2) in the cylindrical cavity (14), so that its bottom surface is kept at a distance from the bottom of the cylindrical cavity (14), preventing the power device components from directly contacting the bottom of the cylindrical cavity (14) and being damaged during disassembly.

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