A bolt-on tab pneumatic fastening tool for use in a narrow space above a rotor

Abstract

The application discloses a bolt locking piece pneumatic fastening tool for a rotor upper narrow space, which comprises a gas gun mechanism and a connecting mechanism, wherein the gas gun mechanism comprises a shell, an air inlet pipe located in the shell, a switch located outside the air inlet pipe, an air outlet hole located at the top of the shell, a support located at the periphery of the air inlet pipe, a ball valve located at the end of the air inlet pipe, an air outlet pipe located outside the ball valve, a piston located in the air outlet pipe and a first spring located outside the piston; and the connecting mechanism is connected with the bolt locking piece. The bolt locking piece can be knocked tightly by the pushing of the piston through air pressure, without the need of the user to make a swinging action, so that the bolt locking piece can be effectively avoided from being damaged and the bolt can be effectively avoided from falling off due to the unknocking of the bolt locking piece during the knocking process. Meanwhile, the bolt locking piece has the advantages of simple structure, high portability, great significance for improving work efficiency, guaranteeing installation quality and not damaging other adjacent components.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water turbine generator rotor, in particular to a bolt locking plate pneumatic fastening tool for narrow space above rotor. BACKGROUND

[0002] The wind baffle on large water turbine generator rotor is usually fixed baffle type, which is used to close the air gap between the stator and rotor, improve the effective wind volume and reduce the ventilation loss. For the closed self-circulating ventilation cooling system, it is required that there is no gap between the wind baffle and air cover, and there is enough gap between the wind baffle and rotating parts, so the part of the wind baffle near the air cover needs to have a certain curvature. The adjacent two wind baffles are connected by bolts, and locking plates are arranged to prevent the bolts from loosening. During the maintenance of the unit, sometimes the rotor wind baffle needs to be removed for inspection, or all the bolts above the rotor need to be fastened for inspection. Usually, the locking plate is curled, and then a punch and a hammer are used to knock it tight. Due to the narrow space on the side of the air cover, the original method may cause damage to the stator bar during the fastening of the bolt locking plate, affecting the normal operation of the unit. In addition, due to the narrow space, the locking plate cannot be fastened with enough force by using a hammer, and after a period of operation, the bolts and locking plates may fall off, causing irregular movement of metal between the stator and rotor, resulting in non-stop of the unit. In order to solve the problem that the bolt locking plate on the wind baffle near the air cover of the rotor is difficult to fasten, a bolt locking plate fastening tool for narrow space above rotor is provided. SUMMARY

[0003] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0004] In view of the above and / or problems existing in the prior art, the present application is proposed.

[0005] Therefore, the present application solves the problem that the bolt locking plate on the wind baffle near the air cover of the rotor is difficult to fasten in the prior art.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a bolt locking plate pneumatic fastening tool for narrow space above rotor, comprising a gas gun mechanism, including a shell, an air inlet pipe located inside the shell, a switch located outside the air inlet pipe, an air outlet hole located at the top of the shell, a support located around the air inlet pipe, a ball valve located at the end of the air inlet pipe, an air outlet pipe located outside the ball valve, a piston located inside the air outlet pipe, and a first spring located outside the piston; and

[0007] The connecting mechanism includes a connecting piece located at the bottom of the air intake pipe, a connecting frame is provided on the outside of the connecting piece, a connecting seat is provided at the bottom of the connecting frame, an air pipe is provided on the outside of the connecting seat, a locking tube is provided on the outside of the connecting piece, a locking piece is provided inside the connecting seat, and a limiting piece is provided on the outside of the locking tube.

[0008] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor of the present invention, wherein: the two ends of the ball valve are connected to the air inlet pipe and the air outlet pipe respectively;

[0009] The inner diameter of the outlet pipe is the same as the outer diameter of the piston, and the piston and the outlet pipe form an elastic telescopic structure through a first spring.

[0010] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor described in the present invention, the connecting piece includes an interface, a telescopic tube is provided at the bottom of the interface, a ring is provided at the bottom of the telescopic tube, a sealing ring is provided on the inner side of the ring, and a sliding rod is provided on the outer side of the ring.

[0011] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor of the present invention, the connecting seat and the connecting piece are fixed by a connecting frame, and a cavity for placing the locking piece is reserved inside the connecting seat.

[0012] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor of the present invention, wherein: the locking tube is movably sleeved on the outside of the connecting piece;

[0013] A guide groove is provided in the middle of the inner wall of the locking tube, and an abutment groove is also provided in the lower part of the inner wall of the locking tube;

[0014] The guide groove is inclined in a quarter spiral shape, and the guide groove is matched with the slide rod.

[0015] As a preferred solution of the pneumatic fastening tool for bolt locking pieces in a narrow space above the rotor of the present invention, the collar and the locking tube form a linkage structure through a sliding rod.

[0016] As a preferred solution of the pneumatic fastening tool for bolt locking pieces in a narrow space above the rotor of the present invention, the depth of the abutment groove is set to change from deep to shallow.

[0017] As a preferred solution of the pneumatic fastening tool for bolt locking pieces in a narrow space above a rotor of the present invention, the locking member includes a clamping rod, and a second spring is sleeved on the outside of the clamping rod.

[0018] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor of the present invention, the groove and the clamping rod are matched with each other, and the front end of the clamping rod is movably embedded in the groove;

[0019] The clamping rod and the trachea are in a clamping fit, and the clamping rod and the trachea form an elastic telescopic structure through a second spring.

[0020] As a preferred solution of the pneumatic fastening tool for bolt lock pieces in a narrow space above the rotor of the present invention, the limiting member includes a fixed cover fixed to the top of the interface, and a clamping block is movably embedded between the side walls of the fixed cover;

[0021] An opening matched with the clamping block is left on the outer wall of the locking tube.

[0022] The beneficial effects of the present invention are as follows: by pushing the piston with air pressure, the user can tighten the bolt lock plate without swinging the piston, which can effectively avoid the risk of the wire rod being damaged during the tightening process of the bolt lock plate and the risk of the bolt falling off due to the lock plate not being tightened. At the same time, the invention has a simple structure and high portability, which is of great significance for improving work efficiency, ensuring installation quality, and preventing damage to other adjacent components.

[0023] When the tool is in use, the connection between the connector and the air pipe can be achieved by rotating the locking tube, which reduces the difficulty of connecting the connector and the air pipe, making the connection and disconnection between the pneumatic fastening tool and the compressed air system faster and more efficient when in use, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0025] Figure 1 A schematic diagram of the overall structure of a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the internal structure of an air gun mechanism in a pneumatic fastening tool for bolt locks in a narrow space above a rotor according to an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the connection structure between the piston and the first spring in a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the overall structure of the connection mechanism in a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention;

[0029] Figure 5 A schematic cross-sectional view of the connection mechanism of a pneumatic fastening tool for bolt locks in a narrow space above a rotor according to an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the connection structure between a connecting frame and a connecting seat in a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention;

[0031] Figure 7 In a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention, Figure 5 A is an enlarged structural diagram;

[0032] Figure 8 A schematic diagram of the connection structure between the retaining groove and the locking member in a pneumatic fastening tool for a bolt lock piece in a narrow space above a rotor according to an embodiment of the present invention;

[0033] Figure 9 A schematic diagram of the structure of a guide groove in a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention;

[0034] Figure 10 A schematic diagram of the connection structure between a limiter and a locking tube in a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0038] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] Reference Figure 1-3 , this embodiment provides a pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor.

[0041] The pneumatic fastening tool for bolt lock pieces in a narrow space above a rotor includes an air gun mechanism 100 .

[0042] Specifically, the air gun mechanism 100 includes a gun-shaped shell 101 with a hollow interior. An air inlet pipe 102 runs through the interior of the shell 101 as a whole. At the same time, an integrated switch 103 located on the outside of the air inlet pipe 102 is installed at the handle at the lower part of the shell 101. At the same time, an exhaust hole 104 connected to the outside is opened on the top of the shell 101. A bracket 105 for fixing the air inlet pipe is also provided on the periphery of the air inlet pipe 102. The bracket 105 is fixed between the air inlet pipe 102 and the shell 101, and a ball valve 106 is also connected to the end of the air inlet pipe 102. At the same time, the other end of the ball valve 106 is connected to the air outlet pipe 107. A movable piston 108 is installed inside the pipe mouth of the air outlet pipe 107. At the same time, a first spring 109 is sleeved between the piston 108 and the pipe mouth of the air outlet pipe 107.

[0043] Furthermore, the inner diameter of the outlet pipe 107 is the same as the outer diameter of the piston 108, that is, the piston 108 can completely close the outlet pipe 107 to ensure the air tightness of the outlet pipe 107. At the same time, the piston 108 is elastically supported by the first spring 109. When low-pressure compressed air enters the outlet pipe 107, it can push the piston 108 to squeeze the first spring 109 to extend for use, and when the low-pressure compressed air is discharged from the exhaust hole 104, the piston 108 can be reset under the elastic force of the first spring 109.

[0044] When the tool is in use, the initial state is that the switch 103 is open and the ball valve 106 is closed. When not in use, the bottom end of the air inlet pipe 102 is connected to the low-pressure compressed air system (0.6Mpa-0.8Mpa), and the low-pressure compressed air is used as the power source. After the connection, the low-pressure compressed air is discharged into the housing 101 through the connection between the air inlet pipe 102 and the switch 103, and discharged through the side exhaust hole 104 on the housing 101; when in use, first open the ball valve 106 and press the switch 103. At this time, the air inlet pipe 102 is closed, and the low-pressure compressed air can enter the air outlet pipe 107 through the air inlet pipe 102 and the ball valve 106, impacting the piston 10 8. The piston 108 squeezes the first spring 109 and extends out of the air outlet pipe 107 to tighten the locking plate. Each time the lock is struck, the switch 103 is released, allowing the low-pressure compressed air to be discharged through the side exhaust hole 104. At this time, the air pressure in the air outlet pipe 107 disappears, and the piston 108 can return to its initial position under the elastic force of the first spring 109. The switch 103 can then be pressed again to strike the next time. After use, the ball valve 106 is closed, and the low-pressure compressed air is turned off, and the connection between the air inlet pipe 102 and the low-pressure compressed air system is disconnected. The pneumatic fastening device is designed based on the spatial limitations of the windshield on the rotor and the stator wire rod. By pushing the piston 108 with air pressure, the user can tighten the bolt lock plate without swinging the bolt. This can effectively avoid the risk of the wire rod being damaged during the tightening process of the bolt lock plate and the risk of the bolt falling off due to the lock plate not being tightened. At the same time, the device has a simple structure and high portability, which is of great significance for improving work efficiency, ensuring installation quality, and preventing damage to other adjacent components.

[0045] Example 2

[0046] Reference Figure 1-9 , which is the second embodiment of the present invention, is based on the previous embodiment and differs from the previous embodiment in that:

[0047] The pneumatic fastening tool for bolt locking pieces in a narrow space above a rotor further includes a connecting mechanism 200 .

[0048] Specifically, the connecting mechanism 200 includes a connecting piece 201 located at the bottom of the air inlet pipe 102 and connected thereto, the connecting piece 201 includes a tubular interface 201a fixed to the bottom of the air inlet pipe 102, a telescopic tube 201b of telescopic length fixedly provided at the bottom of the interface 201a, and a collar 201c provided at the bottom of the telescopic tube 201b, a sealing ring 201d fixedly provided on the inner side of the collar 201c, and two sliding rods 201e are provided in an annular array on the outer side of the collar 201c, a connecting frame 202 provided with a frame structure is provided on the outer side of the upper end of the connecting piece 201, that is, the connecting frame 202 is fixed to the bottom periphery of the interface 201a, and a connecting ring 201d is fixed on the bottom of the connecting frame 202. The connecting seat 203 forms an integral structure with the connecting member 201 through the connecting frame 202. At the same time, the bottom of the connecting seat 203 is concave, and the trachea 204 is passed through the inside. The extension of the trachea 204 can be limited by the cooperation between the connecting seat 203 and the outer convex ring of the trachea 204, and a locking tube 205 is movably embedded in the concave part of the outer wall of the interface 201a. The locking tube 205 can rotate relative to the connecting member 201. A cavity is also left inside the connecting seat 203, and a locking member 206 is installed inside the cavity. The locking member 206 includes a clamping rod 206a that passes through the outside of the connecting seat 203, and a second spring 206b is sleeved on the outside of the clamping rod 206a located in the cavity.

[0049] Furthermore, two guide grooves 205a are provided in a circular array in the middle of the inner wall of the locking tube 205. The guide grooves 205a can slide with the slide rod 201e. At the same time, the guide grooves 205a are arranged to be inclined downward in a quarter spiral shape. When the locking tube 205 rotates counterclockwise, the slide rod 201e can slide inside the guide grooves 205a. Then, under the push of the inclined inner wall of the guide grooves 205a, the slide rod 201e can pull the ring 201c and the telescopic tube 201b to move, so that the ring 201c can be linked with the rotation of the locking tube 205 to achieve the purpose of extending the telescopic tube 201b and moving the ring 201c downward, thereby facilitating the connection and cooperation between the ring 201c and the trachea 204.

[0050] At the same time, two grooves 205b are also provided in a circular array on the lower part of the inner wall of the locking tube 205, and the depth of the grooves 205b is set from deep to shallow, and the outer end of the clamping rod 206a is movably fitted to extend into the interior of the grooves 205b. When the locking tube 205 rotates, the grooves 205b can rotate synchronously therewith, and then according to the change in the depth of the relative position of the grooves 205b and the clamping rod 206a, the clamping rod 206a can be pushed by the grooves 205b to cooperate with the second spring 206b to move telescopically, and a bayonet that cooperates with the clamping rod 206a is left on the outside of the trachea 204, and then the locking and unlocking functions of the trachea 204 are realized through the cooperation between the bayonet and the clamping rod 206a.

[0051] When the interface 201a is connected to the trachea 204, the trachea 204 is first inserted into the locking tube 205. The trachea 204 is accurately positioned at the connection position by the cooperation between the connecting seat 203 and the outer convex edge of the trachea 204. Then, the user rotates the locking tube 205 counterclockwise. At this time, the guide groove 205a and the supporting groove 205b move synchronously with it. The slide bar 201e can slide inside the guide groove 205a. Then, under the push of the inclined inner wall of the guide groove 205a, the collar 201c is pulled down and the telescopic tube 201b is extended, so that the collar 201c moves down to the tube mouth of the trachea 204. At the same time, the sealing ring 201d is tightly attached to the top of the trachea 204. At this time, the connection and sealing between the connector 201 and the trachea 204 are completed. The locking tube 205 is sealed, and as the locking tube 205 rotates, the relative position of the clamping rod 206a and the abutting groove 205b gradually becomes shallower, and then the clamping rod 206a can squeeze the spring to move inward under the pressure of the abutting groove 205b, engage with the air pipe 204, and lock the air pipe 204 in the connection direction to prevent the air pipe 204 from falling off. Through the coordination between the locking tube 205, the connecting piece 201 and the locking piece 206, the connection between the connecting piece 201 and the air pipe 204 can be achieved by rotating the locking tube 205, thereby reducing the difficulty of connecting the connecting piece 201 and the air pipe 204, making the connection and disconnection between the pneumatic fastening tool and the compressed air system faster and more efficient when in use, thereby improving the user experience.

[0052] Example 3

[0053] Reference Figure 1-10 , which is the third embodiment of the present invention, is based on the previous embodiment and differs from the previous embodiment in that:

[0054] The pneumatic fastening tool for bolt locking pieces in a narrow space above the rotor further includes a limiting member 207 disposed on the locking tube 205 , and the limiting member 207 is fixed to the connecting member 201 .

[0055] Specifically, the limiting member 207 includes a fixed cover 207a fixed to the top of the interface 201a, and an arc-shaped clamping block 207b is rotatably embedded between the side walls of the fixed cover 207a. At the same time, the outer wall of the locking tube 205 is provided with an opening that can cooperate with the clamping block 207b.

[0056] Furthermore, after the locking tube 205 is rotated into place and the connection between the connector 201 and the trachea 204 is completed, the user can push the block 207b inward in a counterclockwise direction, thereby rotating one end of the block 207b to the outer wall opening of the locking tube 205, locking the locking tube 205 in a clockwise rotation direction to prevent the locking tube 205 from rotating when the connector 201 and the trachea 204 are in the connected state, thereby ensuring the stability of the connection between the trachea 204 and the connector 201.

[0057] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pneumatic fastening tool for bolt locks in a narrow space above a rotor, characterized by: include, An air gun mechanism (100) comprises a housing (101), an air inlet pipe (102) located inside the housing (101), a switch (103) located outside the air inlet pipe (102), an exhaust hole (104) located at the top of the housing (101), a bracket (105) located outside the air inlet pipe (102), a ball valve (106) located at the end of the air inlet pipe (102), an air outlet pipe (107) located outside the ball valve (106), a piston (108) located inside the air outlet pipe (107), and a first spring (109) located outside the piston (108); and, A connecting mechanism (200) comprises a connecting member (201) located at the bottom of the air inlet pipe (102), a connecting frame (202) being provided on the outside of the connecting member (201), a connecting seat (203) being provided on the bottom of the connecting frame (202), an air pipe (204) being provided on the outside of the connecting seat (203), a locking tube (205) being provided on the outside of the connecting member (201), a locking member (206) being provided on the inside of the connecting seat (203), and a limiting member (207) being provided on the outside of the locking tube (205); The connecting piece (201) includes an interface (201a), a telescopic tube (201b) of which the length can be extended is fixedly provided at the bottom of the interface (201a), a collar (201c) is provided at the bottom of the telescopic tube (201b), a sealing ring (201d) is fixedly provided on the inner side of the collar (201c), and two slide bars (201e) are provided in a circular array on the outer side of the collar (201c), the locking tube (205) is movably sleeved on the outer side of the connecting piece (201), two guide grooves (205a) are provided in a circular array on the middle part of the inner wall of the locking tube (205), and two abutment grooves (205b) are also provided in a circular array on the lower part of the inner wall of the locking tube (205), and the guide groove (205a) is tilted downward in a quarter spiral shape, and the guide groove (205a) can be slidably matched with the slide bar (201e).

2. The pneumatic fastening tool for bolt locks in narrow spaces above the rotor according to claim 1, characterized in that: The two ends of the ball valve (106) are respectively connected to the air inlet pipe (102) and the air outlet pipe (107); The inner diameter of the outlet pipe (107) is the same as the outer diameter of the piston (108), and the piston (108) and the outlet pipe (107) form an elastic telescopic structure via a first spring (109).

3. The pneumatic fastening tool for bolt locks in narrow spaces above the rotor according to claim 2, characterized in that: The connecting seat (203) and the connecting piece (201) are fixed via a connecting frame (202), and a cavity for placing the locking piece (206) is provided inside the connecting seat (203).

4. The pneumatic fastening tool for bolt locks in narrow spaces above a rotor according to claim 3, characterized in that: The collar (201c) and the locking tube (205) form a linkage structure via a sliding rod (201e).

5. The pneumatic fastening tool for bolt locks in a narrow space above a rotor according to claim 4, characterized in that: The depth of the abutment groove (205b) is set to change from deep to shallow.

6. The pneumatic fastening tool for bolt locks in a narrow space above a rotor according to claim 5, characterized in that: The locking member (206) comprises a latch rod (206a), and a second spring (206b) is sleeved on the exterior of the latch rod (206a).

7. The pneumatic fastening tool for bolt locks in a narrow space above a rotor according to claim 6, characterized in that: The support groove (205b) and the clamping rod (206a) are arranged in a coordinated manner, and the front end of the clamping rod (206a) is movably embedded in the support groove (205b); The clamping rod (206a) and the trachea (204) are in a clamping fit, and the clamping rod (206a) and the trachea (204) form an elastic telescopic structure via a second spring (206b).

8. The pneumatic fastening tool for bolt locks in a narrow space above a rotor according to claim 7, characterized in that: The limiting member (207) comprises a fixed cover (207a) fixed to the top of the interface (201a), and a clamping block (207b) is movably embedded between the side walls of the fixed cover (207a); An opening matching the clamping block (207b) is left on the outer wall of the locking tube (205).

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