An assembly integrated machine for processing a rotor assembly

Abstract

The present invention discloses an assembly integrated machine for processing a rotor assembly, which includes a base and a bracket fixed on the upper end surface of the base; it further includes: a servo motor is bolted to the left side of the bracket, and the output end of the servo motor is fixed to one end of a threaded rod, and the other end of the threaded rod extends into the bracket and is rotatably connected to the bracket. Moreover, a moving seat is also threadedly connected to the outer side of the threaded rod; a clamping mechanism is arranged at the lower end of the moving seat. This assembly integrated machine for processing the rotor assembly not only enables the linkage rod to drive the clamping member to contact the rotor and clamp the rotor, and then drives the fixed disk upward by the first cylinder, thereby driving the rotor upward together to achieve the purpose of moving the rotor, but also does not require a separate device to hoist the rotor. It saves time and effort, and greatly improves the assembly efficiency of the rotor assembly. Moreover, it achieves the effect of automatic lubrication, eliminating the need for manual lubricant application, which not only saves labor but also improves efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor assembly processing, and specifically provides an integrated assembly machine for rotor assembly processing. Background Art

[0002] The rotor assembly is usually installed on the rotor seat. After operations such as cutting, grinding, polishing, and inspection of the rotor, an assembly machine can be used to assemble the rotor. It can be used for the assembly of high-pressure rotors from the part level to the unit body. For example, in the patent with the application number "CN202211073453.8" and the patent name "Rotor Assembly Device", the pressing mechanism includes a pressing ring and a plurality of axial tension rods; the upper end surface of the pressing ring cooperates with the upper end surface of the rotor, the lower end surface of the pressing ring is connected to the plurality of axial tension rods, and the pressing ring is used to apply a downward axial pressing force to the rotor; the plurality of axial tension rods are used to apply an upward axial pressing force to the pressing ring, and the plurality of axial tension rods are evenly distributed on the lower end surface of the pressing ring. The strength of the axial tension rods needs to be checked by the load of the axial force, and the axial tension rods can be easily removed, so as to facilitate the hoisting of the rotor. However, the following problems still exist in the actual use of the above structure:

[0003] The above structure applies pressure to the rotor through the pressing ring, and then is used to assist in achieving the assembly effect. However, before installation, the rotor needs to be hoisted separately, so separate equipment or manual operation is required. This not only greatly increases the production time and cost, and the efficiency is relatively low, but also it is not convenient to lubricate the device, resulting in the need for manual lubrication when installing it with the rotor seat, and it is also more difficult to install the rotor without prior lubrication.

[0004] Therefore, we propose an integrated assembly machine for rotor assembly processing, which can well solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated assembly machine for rotor assembly processing, so as to solve the problems in the above background art that currently in the market, the rotor needs to be hoisted separately before installation, so separate equipment or manual operation is required. This not only greatly increases the production time and cost, and the efficiency is relatively low, but also it is not convenient to lubricate the device, resulting in the need for manual lubrication when installing it with the rotor seat, and it is also more difficult to install the rotor without prior lubrication.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An integrated assembly machine for rotor assembly processing, including a base and a bracket fixed on the upper end surface of the base;

[0007] It further includes: a servo motor is fixedly bolted to the left side of the bracket, and the output end of the servo motor is fixed to one end of a threaded rod. The other end of the threaded rod extends into the bracket and is rotatably connected to the bracket. Moreover, a moving seat is also threadedly connected to the outer side of the threaded rod;

[0008] A clamping mechanism is arranged at the lower end of the moving seat, and the clamping and fixing effect is achieved through the extrusion between two groups of clamping members;

[0009] Coating mechanisms are arranged on the front and rear sides of the moving seat. The lubricating oil in the lubricating oil accommodating cavity is extruded onto the sponge block, so that the sponge block absorbs the lubricating oil to achieve the purpose of lubrication.

[0010] Preferably, the clamping mechanism includes a first cylinder and a fixed disk. The first cylinder is fixed to the lower end surface of the moving seat, and the lower end of the first cylinder is fixed to the fixed disk. At the same time, a second cylinder is fixed to the lower end surface of the fixed disk, and the lower end of the second cylinder is rotatably connected to one end of a connecting rod. The other end of the connecting rod is rotatably connected to a linkage rod.

[0011] Preferably, the upper end of the linkage rod is rotatably connected to the fixed disk, and a clamping member is fixedly arranged inside the lower end of the linkage rod. The inner side of the clamping member is arranged in an arc structure, so as to facilitate clamping.

[0012] Preferably, the coating mechanism includes tooth blocks and a gear. The tooth blocks are evenly distributed on the lower surface of the bracket, and there are two rows of tooth blocks. The tooth blocks and the gear are meshed with each other, and the gear is fixed to the outer side of a reciprocating lead screw.

[0013] Preferably, the reciprocating lead screw penetrates through the moving seat and is rotatably connected to the moving seat. A moving rod is threadedly connected to the outer side of the reciprocating lead screw. The lower end of the moving rod is fixed to a connecting disk. The connecting disk is arranged in a semi-circular structure, and a sponge block is embedded in the upper surface of the connecting disk.

[0014] Preferably, a plug rod is slidably arranged through the middle of the moving rod. The inner end of the plug rod is fixed to the fixed disk. At the same time, a first magnet is fixed to the lower end surface of the plug rod. After the first magnet is displaced to a certain position, it is on the same vertical line as the second magnet.

[0015] Preferably, the second magnet is arranged inside the moving rod and fixed to the upper end of a sliding rod. The sliding rod is elastically slidably connected to the moving rod through a return spring. The two ends of the return spring are respectively fixed to the sliding rod and the moving rod. Moreover, an extrusion disk is arranged at the lower end of the sliding rod, and a cavity is arranged below the extrusion disk. The cavity is communicated with a lubricating oil accommodating cavity opened inside the moving rod.

[0016] Preferably, the bottom end of the lubricating oil accommodating cavity is communicated with an infusion channel, and the other end of the infusion channel extends to the lower part of the sponge block inside the connecting disk.

[0017] Preferably, a support seat is arranged on the right side of the upper surface of the base, a rotor seat is placed above the support seat, and the support seat is elastically and slidably connected to the base through a compression spring. The two ends of the compression spring are respectively fixed to the support seat and the base. At the same time, the outer side of the lower end of the support seat is fixed to one end of a pull rope, and the other end of the pull rope is fixed to one end of a connecting slide bar.

[0018] Preferably, the connecting slide bar is slidably arranged on both sides of the support seat on the upper surface of the base. One end of a tension spring is fixed to the outer side of the connecting slide bar, and the other end of the tension spring is fixed to the base. At the same time, a limiting ring is fixed to the inner side of the upper end of the connecting slide bar. The limiting ring is arranged in an arc structure and fits with the outer side of the rotor seat.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The assembly machine for processing the rotor assembly not only enables the linkage rod to drive the clamping member to contact the rotor and clamp the rotor, and then drives the fixed disk upward through the first cylinder, thereby driving the rotor upward together to achieve the purpose of moving the rotor, but also does not require a separate device to hoist the rotor. It saves time and effort and greatly improves the assembly efficiency of the rotor assembly. Moreover, it realizes the effect of automatic lubrication and does not require manual application of lubricating oil, which not only saves labor but also improves efficiency. The specific content is as follows:

[0020] Through the rotational connection formed by the other end of the connecting rod and the linkage rod, the linkage rod rotates inward, so that the linkage rod drives the clamping member to contact the rotor and clamp the rotor. Then, the first cylinder drives the fixed disk upward, thereby driving the rotor upward together to achieve the purpose of moving the rotor.

[0021] The servo motor drives the threaded rod to rotate, so that the threaded rod drives the moving seat connected by threads to move to the right, and the rotor moves above the rotor seat. At this time, only need to control the first cylinder to drive the fixed disk and the rotor clamped below it to be docked with the rotor seat, without the need for a separate device to hoist the rotor, which saves time and effort and greatly improves the assembly efficiency of the rotor assembly.

[0022] Air can enter the lubricating oil accommodating cavity through the one-way channel, so that the lubricating oil in the lubricating oil accommodating cavity is squeezed by the air, and then enters the connecting disk through the one-way liquid infusion groove, thereby wetting the sponge block and lubricating the lower end of the rotor, so that there is no need for manual application of lubricating oil, which not only saves labor but also improves efficiency.

[0023] Further, when the first magnet at the lower end of the plug rod moves to the same vertical line as the second magnet, at this time, through the repulsive force between the magnets, the second magnet drives the sliding rod to slide downward, so that the sliding rod can squeeze the air below it while sliding downward.

[0024] The weight of the rotor seat presses the support seat downward, causing the support seat to slide downward under force, which in turn drives one end of the pulling rope downward, causing the other end of the pulling rope to pull the connecting sliding rod to slide inward, thereby driving the fixed limit ring to contact the rotor seat, and then achieving the effect of limiting and fixing the rotor seat. This not only realizes the self-limiting effect but also avoids the displacement of the rotor seat during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view structural schematic diagram of the present invention;

[0026] Figure 2 It is a bottom view structural schematic diagram of the bracket of the present invention;

[0027] Figure 3 For the present invention Figure 2 An enlarged structural schematic diagram of part A in it;

[0028] Figure 4 It is a front view structural schematic diagram of the clamping mechanism of the present invention;

[0029] Figure 5 It is a sectional view structural schematic diagram of the coating mechanism of the present invention;

[0030] Figure 6 For the present invention Figure 5 An enlarged structural schematic diagram of part B in it;

[0031] Figure 7 It is a sectional view structural schematic diagram of the moving rod of the present invention;

[0032] Figure 8 It is a front view structural schematic diagram of the connection between the support seat and the base of the present invention;

[0033] Figure 9 It is a sectional view structural schematic diagram of the connection between the support seat and the base of the present invention.

[0034] In the figure: 1. Base; 2. Bracket; 3. Servo motor; 4. Threaded rod; 5. Limit ring; 6. Moving seat; 7. First cylinder; 8. Fixed disk; 9. Second cylinder; 10. Link; 11. Linkage rod; 12. Clamping piece; 13. Tooth block; 14. Gear; 15. Reciprocating lead screw; 16. Moving rod; 17. Connection disk; 18. Sponge block; 19. Plug rod; 20. First magnet; 21. Tensile spring; 22. Sliding rod; 23. Second magnet; 24. Return spring; 25. Lubricating oil cavity; 26. Support seat; 27. Rotor seat; 28. Pressure spring; 29. Pulling rope; 30. Connecting sliding rod. DETAILED DESCRIPTION OF THE INVENTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1-9 , the present invention provides the following technical solutions:

[0037] Embodiment 1: To solve the problem proposed in the prior art that the rotor needs to be hoisted separately before installation, so separate equipment or manual operation is required. This not only greatly increases the production time and cost, but also has relatively low efficiency. At the same time, it is not convenient to lubricate the device, resulting in the need for manual lubrication when installing it with the rotor seat 27, and it is also difficult to install the rotor without prior lubrication. Therefore, the following solution is disclosed, including a base 1 and a bracket 2 fixed on the upper end surface of the base 1; further including: a servo motor 3 is bolted to the left side of the bracket 2, and the output end of the servo motor 3 is fixed to one end of a threaded rod 4, and the other end of the threaded rod 4 extends into the bracket 2 and is rotatably connected to the bracket 2. Moreover, a moving seat 6 is also threadedly connected to the outer side of the threaded rod 4; a clamping mechanism is arranged at the lower end of the moving seat 6, and the clamping and fixing effect is achieved through the extrusion between two sets of clamping members 12; lubricating mechanisms are arranged on the front and rear sides of the moving seat 6, and the lubricating oil in the lubricating oil accommodating cavity 25 is extruded onto the sponge block 18, so that the sponge block 18 absorbs the lubricating oil to achieve the purpose of lubrication. The clamping mechanism includes a first cylinder 7 and a fixed disk 8. Among them, the first cylinder 7 is fixed to the lower end surface of the moving seat 6, and the lower end of the first cylinder 7 is fixed to the fixed disk 8. At the same time, a second cylinder 9 is fixed to the lower end surface of the fixed disk 8, and the lower end of the second cylinder 9 is rotatably connected to one end of a connecting rod 10, and the other end of the connecting rod 10 is rotatably connected to a linkage rod 11. The upper end of the linkage rod 11 is rotatably connected to the fixed disk 8, and a clamping member 12 is fixedly arranged on the inner side of the lower end of the linkage rod 11. Moreover, the inner side of the clamping member 12 is arranged in an arc structure, so as to facilitate clamping.

[0038] First, the first cylinder 7 drives the fixed disk 8 downward, so that the clamping members 12 are located on both sides of the rotor. Subsequently, by starting the second cylinder 9, one end of the connecting rod 10 is driven upward by the second cylinder 9. Through the rotational connection formed by the other end of the connecting rod 10 and the linkage rod 11, the linkage rod 11 rotates inward, so that the linkage rod 11 drives the clamping members 12 to contact the rotor and clamp the rotor. Then, the first cylinder 7 drives the fixed disk 8 upward, thereby driving the rotor upward together, thus achieving the purpose of moving the rotor. At this time, only the servo motor 3 needs to be started, so that the servo motor 3 drives the threaded rod 4 to rotate, so that the threaded rod 4 drives the moving seat 6 connected by threads to move to the right, so that the rotor moves above the rotor seat 27. At this time, only the first cylinder 7 needs to be controlled to drive the fixed disk 8 and the rotor clamped below it to be docked with the rotor seat 27, without the need for a separate device to hoist the rotor, which saves time and effort and greatly improves the assembly efficiency of the rotor assembly.

[0039] Embodiment 2: On the basis of Embodiment 1, a new technical solution is added, so that there is no need for manual lubricating oil application, which not only saves labor but also improves efficiency. For details, refer to Figures 1-7 , the lubricating mechanism includes a tooth block 13 and a gear 14. The tooth blocks 13 are evenly distributed on the lower surface of the bracket 2, and there are two rows of tooth blocks 13. The tooth blocks 13 and the gear 14 are in meshing connection. The gear 14 is fixed on the outer side of the reciprocating lead screw 15. The reciprocating lead screw 15 passes through the moving seat 6 and is rotationally connected with the moving seat 6. A moving rod 16 is threadedly connected to the outer side of the reciprocating lead screw 15. The lower end of the moving rod 16 is fixed to the connecting disk 17, and the connecting disk 17 is arranged in a semi-circular structure. A sponge block 18 is embedded in the upper surface of the connecting disk 17. An insertion rod 19 is slidably arranged through the middle of the moving rod 16, and the inner end of the insertion rod 19 is fixed to the fixed disk 8. At the same time, a first magnet 20 is fixed to the lower end surface of the insertion rod 19, and after the first magnet 20 is displaced to a certain position, it is on the same vertical line as the second magnet 23. The second magnet 23 is arranged inside the moving rod 16 and fixed to the upper end of the sliding rod 22. The sliding rod 22 is elastically slidably connected with the moving rod 16 through a return spring 24. At the same time, both ends of the return spring 24 are fixed to the sliding rod 22 and the moving rod 16 respectively. A pressing disk is arranged at the lower end of the sliding rod 22, and there is a cavity below the pressing disk. The cavity is communicated with the lubricating oil containing cavity 25 opened inside the moving rod 16. The bottom end of the lubricating oil containing cavity 25 is communicated with the infusion channel, and the other end of the infusion channel extends to the lower part of the sponge block 18 inside the connecting disk 17.

[0040] Moreover, during the movement of the moving seat 6, the gear 14 will also be driven to move. When the gear 14 moves to mesh with the tooth block 13, the gear 14 will rotate at this time. Through the rotation of the gear 14, the reciprocating lead screw 15 will be driven to rotate together. Through the rotation of the reciprocating lead screw 15, the two groups of moving rods 16 will be driven to move inward, so that the moving rods 16 drive the connecting disk 17 to dock and be located at the lower end of the rotor, making the sponge block 18 fit with the lower end of the rotor. At the same time, when the moving rods 16 move, the inserting rod 19 will slide in the moving rods 16. When the first magnet 20 at the lower end of the inserting rod 19 moves to the same vertical line as the second magnet 23, at this time, through the repulsive force between the magnets, the second magnet 23 drives the sliding rod 22 to slide downward, so that the air below the sliding rod 22 can be squeezed while the sliding rod 22 moves downward. The cavity below the sliding rod 22 is replenished with air through a separate one-way air inlet. At the same time, when the first magnet 20 and the second magnet 23 are not on the same vertical line, the sliding rod 22 can be reset by the return spring 24 later, which is convenient for the next use. Then the air can enter the lubricating oil containing cavity 25 through the one-way channel, so that the lubricating oil in the lubricating oil containing cavity 25 is squeezed by the air, and then enters the connecting disk 17 through the one-way infusion groove, thereby wetting the sponge block 18, so that the sponge block 18 absorbs the lubricating fluid and lubricates the lower end of the rotor, thus eliminating the need for manual lubrication application, which not only saves labor but also improves efficiency, and can make the assembly of the rotor and the rotor seat 27 more smooth. At the same time, when the rear gear 14 meshes with the tooth block 13 again, the reciprocating lead screw 15 will rotate again, driving the moving rod 16 to move outward, and then driving the connecting disk 17 outward, so that the connecting disk 17 is no longer located below the rotor. At this time, the first cylinder 7 can drive the fixed disk 8 and the rotor clamped below it to move above the rotor seat 27 for assembly.

[0041] Embodiment 3: On the basis of Embodiment 1, a new technical solution is added, thus achieving the effect of self-limitation and avoiding the displacement of the rotor seat 27 during assembly. Specifically refer to Figures 8-9 , a support seat 26 is arranged on the right side of the upper surface of the base 1, and a rotor seat 27 is placed above the support seat 26. The support seat 26 is elastically slidably connected to the base 1 through a pressure spring 28, and both ends of the pressure spring 28 are fixed to the support seat 26 and the base 1 respectively. At the same time, the outer side of the lower end of the support seat 26 is fixed to one end of a pull rope 29, and the other end of the pull rope 29 is fixed to one end of a connecting slide rod 30. The connecting slide rod 30 is slidably arranged on both sides of the support seat 26 on the upper surface of the base 1. The outer side of the connecting slide rod 30 is fixed to one end of a tension spring 21, and the other end of the tension spring 21 is fixed to the base 1. At the same time, a limiting ring 5 is fixed to the inner side of the upper end of the connecting slide rod 30, and the limiting ring 5 is arranged in an arc structure and fits with the outer side of the rotor seat 27.

[0042] Moreover, the rotor seat 27 is placed on the support seat 26. The weight of the rotor seat 27 itself presses the support seat 26 downward, causing the support seat 26 to slide downward under the force. As the support seat 26 moves downward, one end of the pull rope 29 is driven downward together, causing the other end of the pull rope 29 to pull the connecting slide bar 30 to slide inward. As the connecting slide bar 30 moves, the fixed limit ring 5 is driven to contact the rotor seat 27, thereby achieving the effect of limiting and fixing the rotor seat 27. This not only realizes the self-limiting effect but also avoids the displacement of the rotor seat 27 during assembly. At the same time, a pressure spring 28 is provided at the lower end of the support seat 26. In the later stage, the pressure spring 28 can drive the support seat 26 to reset. When the support seat 26 resets, one end of the pull rope 29 is driven upward together, so that the pull rope 29 no longer pulls the connecting slide bar 30 to slide inward. At this time, the connecting slide bar 30 can be pulled to move outward by the setting of the tension spring 21, so that the connecting slide bar 30 drives the limit ring 5 to move outward together, which is convenient for limiting the rotor seat 27 again next time.

[0043] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembly integrated machine for processing a rotor assembly, comprising a base (1) and a bracket (2) fixed to the upper end surface of the base (1); It is characterized in that It further includes: A servo motor (3) is bolted to the left side of the bracket (2), and the output end of the servo motor (3) is fixed to one end of a threaded rod (4). The other end of the threaded rod (4) extends into the bracket (2) and is rotatably connected to the bracket (2). Moreover, a moving seat (6) is also threadedly connected to the outer side of the threaded rod (4); A clamping mechanism is arranged at the lower end of the moving seat (6), and the clamping and fixing effect is achieved through the extrusion between two groups of clamping members (12); Coating mechanisms are arranged on the front and rear sides of the moving seat (6). The lubricating oil in the lubricating oil accommodating cavity (25) is squeezed onto the sponge block (18), so that the sponge block (18) absorbs the lubricating oil to achieve the purpose of lubrication; The clamping mechanism includes a first cylinder (7) and a fixed disk (8). The first cylinder (7) is fixed to the lower end surface of the moving seat (6), and the lower end of the first cylinder (7) is fixed to the fixed disk (8). At the same time, a second cylinder (9) is fixed to the lower end surface of the fixed disk (8), and the lower end of the second cylinder (9) is rotatably connected to one end of a connecting rod (10). Moreover, the other end of the connecting rod (10) is rotatably connected to a linkage rod (11); The upper end of the linkage rod (11) is rotatably connected to the fixed disk (8), and a clamping member (12) is fixed to the inner side of the lower end of the linkage rod (11). Moreover, the inner side of the clamping member (12) is arranged in an arc structure, so as to facilitate clamping the rotor; The coating mechanism includes a tooth block (13) and a gear (14). The tooth blocks (13) are evenly distributed on the lower surface of the bracket (2), and there are two rows of tooth blocks (13). Moreover, the tooth blocks (13) are meshed with the gear (14), and the gear (14) is fixed to the outer side of a reciprocating lead screw (15); The reciprocating lead screw (15) penetrates through the moving seat (6) and is rotatably connected to the moving seat (6). Moreover, a moving rod (16) is threadedly connected to the outer side of the reciprocating lead screw (15). The lower end of the moving rod (16) is fixed to a connecting disk (17), and the connecting disk (17) is arranged in a semi-circular structure. Moreover, a sponge block (18) is embedded in the upper surface of the connecting disk (17); A plug rod (19) is slidably arranged through the middle of the moving rod (16), and the inner end of the plug rod (19) is fixed to the fixed disk (8). At the same time, a first magnet (20) is fixed to the lower end surface of the plug rod (19), and after the first magnet (20) is displaced to a certain position, it is located on the same vertical line as the second magnet (23).

2. An assembly integrated machine for processing a rotor assembly according to claim 1, wherein: The second magnet (23) is arranged inside the moving rod (16) and fixed to the upper end of a sliding rod (22). The sliding rod (22) is elastically slidably connected to the moving rod (16) through a return spring (24). At the same time, both ends of the return spring (24) are fixed to the sliding rod (22) and the moving rod (16) respectively. Moreover, an extrusion disk is arranged at the lower end of the sliding rod (22), and a cavity is arranged below the extrusion disk. The cavity is communicated with a lubricating oil accommodating cavity (25) opened inside the moving rod (16).

3. An assembly integrated machine for processing a rotor assembly according to claim 2, wherein: The bottom end of the lubricating oil accommodating cavity (25) is communicated with the infusion channel, and the other end of the infusion channel extends to the lower part of the inner sponge block (18) of the connecting disc (17).

4. An assembly integrated machine for processing a rotor assembly according to claim 1, characterized in that: A support seat (26) is arranged on the right side of the upper surface of the base (1), a rotor seat (27) is placed above the support seat (26), and the support seat (26) is elastically and slidably connected to the base (1) through a compression spring (28). Both ends of the compression spring (28) are fixed to the support seat (26) and the base (1) respectively. At the same time, the outer side of the lower end of the support seat (26) is fixed to one end of a pull rope (29), and the other end of the pull rope (29) is fixed to one end of a connecting slide rod (30).

5. An assembly integrated machine for processing a rotor assembly according to claim 4, characterized in that: The connecting slide rod (30) is slidably arranged on both sides of the support seat (26) on the upper surface of the base (1). The outer side of the connecting slide rod (30) is fixed to one end of a tension spring (21), and the other end of the tension spring (21) is fixed to the base (1). At the same time, a limiting ring (5) is fixed to the inner side of the upper end of the connecting slide rod (30). The limiting ring (5) is arranged in an arc structure and fits with the outer side of the rotor seat (27).

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