Auxiliary devices for aviation maintenance

Abstract

The present invention provides an auxiliary device for aviation maintenance, which relates to the technical field of maintenance auxiliary devices and includes: a driving mechanism, wherein the driving rod is inserted into the interior of a non-slip grip, and a control mechanism can rotate unidirectionally under the drive of the driving mechanism, and the rotation direction of the control mechanism can be freely adjusted for use, thereby enabling the installation, removal, and tightening of screws. The device does not need to be rotated when installing and loosening the screws, and the installation, removal, and tightening of the screws can be achieved by pressing the non-slip grip. The device is convenient and flexible to use, simplifies the operating steps and the use process, greatly reduces the labor intensity of workers, and has high work efficiency. The device solves the problem that when using the screw installation and removal device, one end of the installation and removal rod needs to be pressed against the top of the screw, and then the screw installation and removal device needs to be manually rotated to achieve the installation, removal, and tightening of the screw, which is relatively cumbersome and requires multiple repetitions of the above steps to complete the installation, removal, and tightening of the screw, resulting in low work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of maintenance auxiliary devices, and in particular to an auxiliary device for aviation maintenance. Background Art

[0002] In recent years, aircraft have been loved by more and more people, especially flapping-wing aircraft, because they usually have the characteristics of small size, low noise, good concealment, etc., which makes them have great application prospects and development space in both civilian and military aspects. At present, when repairing various parts of the aircraft, it is necessary to tighten and loosen the screws, which requires the use of a screw installation device. The most common screw installation device is a screwdriver. At present, the screwdriver can be equipped with different installation heads at one end of the installation rod, which can be used to remove screws of different models and outer diameters.

[0003] However, as for the current screw installation and removal device, when it is used, one end of the installation and removal rod needs to be pressed against the top of the screw, and then the screw installation and removal device needs to be manually rotated to achieve the installation and removal of the screw. Tightening and loosening operations are relatively cumbersome and require repeated steps many times to complete the installation and removal of the screw. When repairing aircraft parts, a large number of screw tightening and removal operations need to be performed. Obviously, the use of traditional screw installation and removal devices during maintenance is labor-intensive, inefficient, and not practical. Summary of the Invention

[0004] In view of this, the present invention provides an auxiliary device for aviation maintenance, which has a one-way drive component. The drive mechanism of the squeezed non-slip grip can drive the control mechanism to rotate in one direction, and the rotation direction of the control mechanism of the device can be freely adjusted for use, so that the screws can be installed and disassembled as well as loosened and tightened. It is convenient and flexible to use, and the installation, loosening and tightening operations of the screws can be achieved without manually twisting the device, which simplifies the operation process and use steps, greatly reduces the labor intensity of workers, and has high work efficiency. After the device is reset by a single press, the control mechanism will not rotate, thereby avoiding the phenomenon of invalid rotation of the screw caused by the reset of the device during installation and use. It is stable to use and has high flexibility and practicality.

[0005] The present invention provides an auxiliary device for aviation maintenance, which specifically includes: an anti-slip grip, a one-way drive assembly installed inside the anti-slip grip; the one-way drive assembly is composed of a drive mechanism and a control mechanism, the drive mechanism includes a drive rod and a positioning block, the drive rod is inserted into the inside of the anti-slip grip, and the positioning block is rotatably connected to the top of the drive rod, and the positioning block is inserted into the inside of the anti-slip grip; the control mechanism includes an operating rod, a control rod and a positioning lever, and a quick-release joint is fixedly installed on the bottom of the operating rod; the operating rod is inserted into the inside of the drive rod, and the control rod is inserted into the inside of the operating rod, the positioning lever is rotatably connected to the bottom of the control rod, and the positioning lever is inserted into the rod body of the operating rod.

[0006] Optionally, the driving mechanism also includes a bidirectional gear set, and the bidirectional gear set consists of a fixed gear, a free gear and a reversing gear. The fixed gear is fixedly mounted on the top of the driving rod, and the free gear is rotatably connected to the inside of the positioning block. The reversing gear is rotatably connected to the inside of the positioning block, and the teeth at the top and bottom of the reversing gear are respectively engaged with the teeth of the fixed gear and the free gear for transmission.

[0007] Optionally, a synchronous gear is provided on the top of the control rod, and the synchronous gear is plugged into the outside of the operating rod, and synchronous tooth grooves are provided inside the fixed gear and the free gear.

[0008] Optionally, two switching positioning grooves, one high and one low, are provided inside the rod body of the operating lever, and the groove bodies on one side of the two switching positioning grooves are connected to each other, and the positioning lever is inserted into the inside of the switching positioning groove.

[0009] Optionally, the cross section of the positioning block is a regular polygon, and a track groove is provided inside the anti-slip handle, and the positioning block is inserted into the track groove.

[0010] Optionally, a driving protrusion is provided inside the driving rod, and one end of the driving protrusion is rotatably connected to the inside of the driving rod, a return torsion spring is provided at the rotating shaft position of the driving protrusion, and the two ends of the return torsion spring are respectively fixedly connected to the inside of the driving protrusion and the inside of the driving rod, and the driving protrusion can only rotate upward inside the driving rod.

[0011] Optionally, a spiral driving groove is provided inside the anti-slip handle, and one end of the driving protrusion is inserted into the driving groove.

[0012] Optionally, a reset spring is provided on the top of the positioning block, and two ends of the reset spring are fixedly connected to the top of the positioning block and the inside of the anti-slip handle respectively.

[0013] Optionally, a spring baffle is provided in the middle of the rod body of the control rod, and the spring baffle is inserted into the inside of the operating rod. A positioning top spring is sleeved on the outside of the rod body of the control rod at the top of the spring baffle, and the two ends of the positioning top spring are respectively fixedly connected to the top of the spring baffle and the inside of the operating rod.

[0014] Beneficial effects

[0015] When the device is in use, the control mechanism can rotate in one direction under the drive of the driving mechanism, and the rotation direction of the control mechanism can be freely adjusted, so that the installation and removal of the screws can be tightened or loosened. The device does not need to be rotated when installing and loosening the screws. The installation and removal of the screws can be tightened or loosened by pressing the non-slip grip. It is convenient and flexible to use, simplifies the operating steps and the use process, greatly reduces the labor intensity of workers, and has high work efficiency. At the same time, the non-slip grip of the device will not drive the control mechanism to rotate when it is reset, so that the screws can be installed and loosened or loosened stably, and the phenomenon that the screws cannot be installed or loosened due to reciprocating rotation will not occur. The use is stable, and the flexibility and practicality of the device are improved.

[0016] In addition, a screw installation head is installed on the outside of the quick-release joint at the bottom of the operating rod of the device, and the device can realize the installation and tightening of the screw through the installation head, and when in use, the device only needs to press the screw and press the non-slip grip to realize the installation and tightening of the screw, which is easy to use. When the non-slip grip is pressed down, the driving groove inside the non-slip grip can drive the driving rod to rotate through the driving protrusion, and because the driving protrusion cannot rotate downward to avoid the guiding effect of the driving groove, the non-slip grip can stably drive the driving rod to rotate when it moves downward, and when the driving rod rotates, it can drive the two-way gear set to rotate, so that the synchronous tooth groove inside the two-way gear set can drive the operating rod to rotate through the synchronous gear, so that after pressing the non-slip grip, the device can drive the control mechanism to rotate through the driving mechanism to realize the installation and tightening of the screw, which is easy and flexible to use.

[0017] In addition, after a single press, the anti-slip grip can automatically move up and reset under the action of the reset spring, and the anti-slip grip will not drive the control mechanism to rotate when it is reset. When the anti-slip grip moves up and resets, since the driving protrusion can rotate upward, the driving groove cannot drive the driving rod to rotate at this time, thereby ensuring that the control mechanism cannot rotate when the anti-slip grip is reset, and the installation, removal, and tightening operations of the screws can be stably realized, and it is stable to use.

[0018] In addition, the rotation directions of the free gear and the fixed gear are always opposite. When the driving rod rotates, the free gear can synchronously follow the driving rod to rotate. Since the free gear and the reversing gear are installed inside the positioning block, the positioning block cannot rotate under the limiting effect of the track groove, so that the free gear and the reversing gear are fixed in the use position inside the positioning block. When the fixed gear rotates, the fixed gear can drive the free gear to reverse synchronously through the reversing gear. Therefore, by controlling the use position of the synchronous gear, the rotation direction of the control mechanism can be adjusted, which is flexible to adjust and easy to use.

[0019] In addition, the rotation direction of the control mechanism can be adjusted by the positioning lever, so that when the non-slip grip is pressed, the control mechanism has two convenient uses: forward rotation and reverse rotation. When the positioning lever is located inside the top switching positioning slot, the synchronous gear is located inside the free gear. At this time, the control mechanism and the free gear have the same rotation direction. When the positioning lever is located inside the bottom switching positioning slot, the control mechanism and the fixed gear have the same rotation direction. Therefore, when using the device, the rotation direction of the control mechanism can be independently selected for use, and it has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0021] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached figure:

[0023] Figure 1 A schematic diagram showing the structure of the present invention;

[0024] Figure 2 A schematic diagram showing the internal structure of the anti-slip handle of the present invention is shown;

[0025] Figure 3 A schematic diagram of the structure of the disassembled drive mechanism and control mechanism of the present invention is shown;

[0026] Figure 4 Shows a schematic diagram of the internal structure of the present invention;

[0027] Figure 5 It shows a schematic diagram of the internal structure of the present invention after the rotation direction of the control mechanism is changed;

[0028] Figure 6 A schematic diagram showing the internal structure of the anti-slip handle of the present invention when it is pressed down;

[0029] Figure 7 It shows a schematic diagram of the internal structure of the anti-slip handle of the present invention when it is moved upward and reset;

[0030] Figure 8 The present invention is shown Figure 4 A schematic diagram of the structure of the enlarged part A in the middle;

[0031] Figure 9 The present invention is shown Figure 5 Schematic diagram of the structure of the enlarged part B in the middle;

[0032] Figure 10 The present invention is shown Figure 6 Schematic diagram of the structure of the enlarged part C in the middle;

[0033] Figure 11 The present invention is shown Figure 7 Schematic diagram of the enlarged structure of part D in the middle.

[0034] Reference Signs List

[0035] 1. Anti-slip grip; 101. Track groove; 102. Drive groove; 2. Drive mechanism; 201. Drive rod; 2011. Drive bump; 202. Positioning block; 2021. Reset spring; 203. Fixed gear; 2031. Synchronizing tooth groove; 204. Free gear; 205. Reversing gear; 3. Control mechanism; 301. Operating lever; 3011. Switch positioning groove; 302. Control lever; 3021. Synchronizing gear; 3022. Positioning spring; 303. Positioning lever. DETAILED DESCRIPTION

[0036] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0037] Example: Please refer to Figures 1 to 11 :

[0038] The present invention provides an auxiliary device for aviation maintenance, comprising: an anti-slip grip 1, wherein a one-way drive assembly is installed inside the anti-slip grip 1; the one-way drive assembly is composed of a drive mechanism 2 and a control mechanism 3, wherein the drive mechanism 2 includes a drive rod 201 and a positioning block 202, wherein the drive rod 201 is inserted into the interior of the anti-slip grip 1, and the positioning block 202 is rotatably connected to the top of the drive rod 201, and the positioning block 202 is inserted into the interior of the anti-slip grip 1; the control mechanism 3 includes an operating rod 301, a control rod 302, and a positioning lever 303, wherein a quick-release joint is fixedly installed at the bottom of the operating rod 301, and the bottom of the quick-release joint can be installed with mounting heads of different screws; the operating rod 301 is inserted into the interior of the drive rod 201, and the control rod 302 is inserted into the interior of the operating rod 301, the positioning lever 303 is rotatably connected to the bottom of the control rod 302, and the positioning lever 303 is inserted into the rod body of the operating rod 301.

[0039] Furthermore, according to an embodiment of the present invention, Figure 3As shown, the driving mechanism 2 also includes a bidirectional gear set, and the bidirectional gear set consists of a fixed gear 203, a free gear 204 and a reversing gear 205. The fixed gear 203 is fixedly mounted on the top of the driving rod 201, and the free gear 204 is rotatably connected to the inside of the positioning block 202. The reversing gear 205 is rotatably connected to the inside of the positioning block 202, and the gear teeth at the top and bottom of the reversing gear 205 are respectively engaged with the gear teeth of the fixed gear 203 and the free gear 204 for transmission. This design makes the free gear 204 and the fixed gear The rotation direction of 203 is always opposite. When the driving rod 201 rotates, the free gear 204 can synchronously follow the driving rod 201 to rotate. Since the free gear 204 and the reversing gear 205 are installed inside the positioning block 202, the positioning block 202 cannot rotate under the limiting effect of the track groove 101, so that the free gear 204 and the reversing gear 205 are fixed in the use position inside the positioning block 202. When the fixed gear 203 rotates, the fixed gear 203 can drive the free gear 204 to reverse synchronously through the reversing gear 205.

[0040] Furthermore, according to an embodiment of the present invention, Figure 3 As shown, a synchronous gear 3021 is provided on the top of the control rod 302, and the synchronous gear 3021 is inserted into the outside of the operating rod 301, and a synchronous tooth groove 2031 is provided inside the fixed gear 203 and the free gear 204. During use, the rotation direction of the control mechanism 3 can be adjusted by controlling the use position of the synchronous gear 3021, which is flexible and easy to use.

[0041] Furthermore, according to an embodiment of the present invention, Figure 3 As shown, two switching positioning grooves 3011, one high and one low, are provided inside the rod body of the operating lever 301, and the groove bodies on one side of the two switching positioning grooves 3011 are connected to each other, and the positioning lever 303 is inserted into the inside of the switching positioning groove 3011. In use, when the positioning lever 303 is located inside the top switching positioning groove 3011, the synchronous gear 3021 is located inside the free gear 204. At this time, the control mechanism 3 has the same rotation direction as the free gear 204. When the positioning lever 303 is located inside the bottom switching positioning groove 3011, the control mechanism 3 has the same rotation direction as the fixed gear 203. Therefore, when using the device, the rotation direction of the control mechanism 3 can be independently selected for use, and it has strong adaptability.

[0042] Furthermore, according to an embodiment of the present invention, Figure 2As shown, the cross-section of the positioning block 202 is a regular polygon, and a track groove 101 is provided inside the anti-slip handle 1. The positioning block 202 is inserted into the track groove 101. During use, the track groove 101 can limit the moving trajectory of the positioning block 202, so that the positioning block 202 will not be skewed or twisted during movement, causing the device to be stuck and fail, and the use is stable.

[0043] Furthermore, according to an embodiment of the present invention, Figure 2 and Figure 3 As shown, the interior of the anti-slip grip 1 is provided with a spiral driving groove 102, and one end of the driving protrusion 2011 is inserted into the interior of the driving groove 102. During use, when the anti-slip grip 1 is pressed down, the driving groove 102 inside the anti-slip grip 1 can drive the driving rod 201 to rotate through the driving protrusion 2011, and because the driving protrusion 2011 cannot rotate downward to avoid the guiding effect of the driving groove 102, the anti-slip grip 1 can stably drive the driving rod 201 to rotate when it moves downward, and when the driving rod 201 rotates, it can drive the bidirectional gear set to rotate, so that the synchronous tooth groove 2031 inside the bidirectional gear set can drive the operating rod 301 to rotate through the synchronous gear 3021, so that after pressing the anti-slip grip 1, the device can drive the control mechanism 3 to rotate through the driving mechanism 2 to realize the operation of installing and loosening the screws, which is convenient and flexible to use.

[0044] Furthermore, according to an embodiment of the present invention, Figure 3 As shown, a driving protrusion 2011 is provided inside the driving rod 201, and one end of the driving protrusion 2011 is rotatably connected to the inside of the driving rod 201, a reset torsion spring is provided at the rotating shaft position of the driving protrusion 2011, and the two ends of the reset torsion spring are respectively fixedly connected to the inside of the driving protrusion 2011 and the inside of the driving rod 201, and the driving protrusion 2011 can only rotate upward inside the driving rod 201, and a reset top spring 2021 is provided on the top of the positioning block 202, and the two ends of the reset top spring 2021 are respectively fixedly connected to the inside of the driving protrusion 2011 and the inside of the driving rod 201. The top of the positioning block 202 and the inside of the anti-slip grip 1, during use, the anti-slip grip 1 can automatically move up and reset under the action of the reset spring 2021 after a single press, and the anti-slip grip 1 will not drive the control mechanism 3 to rotate when it is reset. When the anti-slip grip 1 moves up and resets, since the driving protrusion 2011 can rotate upward, the driving groove 102 cannot drive the driving rod 201 to rotate at this time, thereby ensuring that the control mechanism 3 cannot rotate when the anti-slip grip 1 is reset, and the installation and tightening operations of the screws can be stably realized.

[0045] Furthermore, according to an embodiment of the present invention, Figure 3As shown, a spring baffle is provided in the middle of the rod body of the control rod 302, and the spring baffle is inserted into the inside of the operating rod 301. The outside of the rod body of the control rod 302 located at the top of the spring baffle is sleeved with a positioning top spring 3022, and the two ends of the positioning top spring 3022 are respectively fixedly connected to the top of the spring baffle and the inside of the operating rod 301. During use, the use position of the positioning lever 303 can be positioned by the positioning top spring 3022, so that the device will not accidentally change the rotation direction of the control mechanism 3 during use, and is stable to use.

[0046] Specific usage and function of this embodiment: In the present invention, when repairing aircraft accessories, the bottom of the operating rod 301 is installed with the installation and removal head of the corresponding screw, and the installation and removal of the screw can be tightened or loosened by the installation and removal head. According to the installation and removal tightness requirements of the screw, the rotation direction of the control mechanism 3 is adjusted. The rotation direction of the control mechanism 3 can be adjusted by the positioning lever 303. The rotation directions of the free gear 204 and the fixed gear 203 of the device are always opposite. When the driving rod 201 rotates, the free gear 204 can synchronously follow the driving rod 201 to rotate. Since the free gear 204 and the reversing gear 205 are installed inside the positioning block 202, the positioning block 202 cannot be limited by the track groove 101. The free gear 204 and the reversing gear 205 are fixed in their respective positions inside the positioning block 202. When the fixed gear 203 rotates, the fixed gear 203 can drive the free gear 204 to reverse synchronously through the reversing gear 205. Thus, by controlling the position of the synchronous gear 3021, the rotation direction of the control mechanism 3 can be adjusted. When the positioning lever 303 is located inside the top switching positioning slot 3011, the synchronous gear 3021 is located inside the free gear 204. At this time, the control mechanism 3 has the same rotation direction as the free gear 204. When the positioning lever 303 is located inside the bottom switching positioning slot 3011, the control mechanism 3 has the same rotation direction as the fixed gear 203. Therefore, when using the device, the rotation direction of the control mechanism 3 can be independently selected for use. When installing or removing the screw, it is only necessary to tighten the screw and press the anti-slip grip 1 to achieve the installation and tightening of the screw, which is convenient to use. When the anti-slip grip 1 is pressed down, the driving groove 102 inside the anti-slip grip 1 can drive the driving rod 201 to rotate through the driving protrusion 2011, and because the driving protrusion 2011 cannot rotate downward to avoid the guiding effect of the driving groove 102, the anti-slip grip 1 can stably drive the driving rod 201 to rotate when it moves downward, and when the driving rod 201 rotates, it can drive the bidirectional gear set to rotate, so that the synchronous tooth groove 2031 inside the bidirectional gear set can drive the operating rod 301 to rotate through the synchronous gear 3021. , so that after pressing the anti-slip grip 1, the device can drive the control mechanism 3 to rotate through the driving mechanism 2 to realize the operation of installing and tightening the screw. After a single press is completed, the anti-slip grip 1 is released, and the anti-slip grip 1 can automatically move up and reset under the action of the reset top spring 2021, and the anti-slip grip 1 will not drive the control mechanism 3 to rotate when it is reset. When the anti-slip grip 1 moves up and resets, since the driving protrusion 2011 can rotate upward, the driving groove 102 cannot drive the driving rod 201 to rotate at this time, thereby ensuring that the control mechanism 3 cannot rotate when the anti-slip grip 1 is reset, thereby avoiding the problem of invalid rotation of the screw due to screw reversal and inability to install and tighten. Repeat the above steps to realize the operation of quickly installing and tightening the screw.

[0047] Finally, it should be noted that when describing the positions of various components and the matching relationships between them, the present invention usually takes one / a pair of components as an example. However, those skilled in the art should understand that such positions, matching relationships, etc. are also applicable to other components / other pairs of components.

[0048] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. An auxiliary device for aviation maintenance, characterized in that: include: The invention relates to a non-slip grip (1), wherein a one-way drive assembly is installed inside the non-slip grip (1); the one-way drive assembly is composed of a drive mechanism (2) and a control mechanism (3); the drive mechanism (2) includes a drive rod (201) and a positioning block (202); the drive rod (201) is inserted into the inside of the non-slip grip (1), and the positioning block (202) is rotatably connected to the top of the drive rod (201); the positioning block (202) is inserted into the inside of the non-slip grip (1); the control mechanism (3) is composed of a drive mechanism (2) and a control mechanism (3); the drive mechanism (2) includes a drive rod (201) and a positioning block (202); the drive rod (201) is inserted into the inside of the non-slip grip (1), and the positioning block (202) is rotatably connected to the top of the drive rod (201); the positioning block (202) is inserted into the inside of the non-slip grip (1); The control mechanism (3) includes an operating rod (301), a control rod (302) and a positioning lever (303); a quick-release joint is fixedly installed at the bottom of the operating rod (301); the operating rod (301) is plugged into the interior of the driving rod (201), and the control rod (302) is plugged into the interior of the operating rod (301); the positioning lever (303) is rotatably connected to the bottom of the control rod (302), and the positioning lever (303) is plugged into the interior of the rod body of the operating rod (301); The driving mechanism (2) further comprises a bidirectional gear set, and the bidirectional gear set comprises a fixed gear (203), a free gear (204) and a reversing gear (205), wherein the fixed gear (203) is fixedly mounted on the top of the driving rod (201), and the free gear (204) is rotatably connected to the inside of the positioning block (202), and the reversing gear (205) is rotatably connected to the inside of the positioning block (202), and the gear teeth at the top and bottom of the reversing gear (205) are respectively engaged with the gear teeth of the fixed gear (203) and the free gear (204) for transmission; The top of the control rod (302) is provided with a synchronous gear (3021), and the synchronous gear (3021) is plugged into the outside of the operating rod (301), and the interiors of the fixed gear (203) and the free gear (204) are both provided with synchronous tooth grooves (2031); The operating lever (301) is provided with two switching positioning grooves (3011), one high and one low, inside the lever body, and the groove bodies on one side of the two switching positioning grooves (3011) are connected to each other, and the positioning lever (303) is inserted into the inside of the switching positioning groove (3011); A driving protrusion (2011) is provided inside the driving rod (201), and one end of the driving protrusion (2011) is rotatably connected to the inside of the driving rod (201). A return torsion spring is provided at the rotation axis position of the driving protrusion (2011), and the two ends of the return torsion spring are respectively fixedly connected to the inside of the driving protrusion (2011) and the inside of the driving rod (201). The driving protrusion (2011) can only rotate upward inside the driving rod (201); A spiral driving groove (102) is provided inside the anti-slip handle (1), and one end of the driving protrusion (2011) is inserted into the driving groove (102).

2. The aviation maintenance auxiliary device according to claim 1, characterized in that: The cross section of the positioning block (202) is a regular polygon, and a track groove (101) is provided inside the anti-slip handle (1), and the positioning block (202) is inserted into the track groove (101).

3. The aviation maintenance auxiliary device according to claim 1, characterized in that: A reset spring (2021) is provided on the top of the positioning block (202), and two ends of the reset spring (2021) are fixedly connected to the top of the positioning block (202) and the inside of the anti-slip handle (1), respectively.

4. The aviation maintenance auxiliary device according to claim 1, wherein: The middle part of the rod body of the control rod (302) is provided with a spring baffle, and the spring baffle is inserted into the interior of the operating rod (301). The exterior of the rod body of the control rod (302) located at the top of the spring baffle is sleeved with a positioning top spring (3022), and the two ends of the positioning top spring (3022) are respectively fixedly connected to the top of the spring baffle and the interior of the operating rod (301).

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