A breech sleeve

Abstract

The utility model discloses a kind of air cannon sleeve, belong to air cannon sleeve technical field, including first barrel body and second barrel body, the lower end of the first barrel body is set second barrel body, the outer surface of the first barrel body is set annular groove, locking structure mounting hole is set in the both ends of annular groove, locking structure is installed in locking structure mounting hole, the locking structure includes end head screw, locking spring and boss, the front portion of end head screw is set locking spring, one end of locking spring is connected with end head screw, the other end of spring is connected with boss.Locking can be realized, and locking structure can be quickly disassembled and installed, and bolt connection hole is special-shaped hole, adapted to bolt screwing, to avoid bolt wear, ejector spring is set in bolt screwing hole, ejector spring can realize bolt quickly from bolt screwing hole out.

Description

Technical Field

[0001] This utility model belongs to the field of air gun sleeve technology, and specifically relates to an air gun sleeve. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In the maintenance and repair of ballastless railway tracks, the Foslow W300-1 fastening system is a core component, and the tightening and loosening of its bolts relies on pneumatic wrench sockets. As a crucial tool used in conjunction with a power wrench, the pneumatic wrench socket must be stably connected to a power source to transmit torque, while also precisely fitting the bolt head. This ensures efficient operation while preventing component damage, significantly impacting the safety, efficiency, and cost control of railway line maintenance.

[0004] The traditional pneumatic wrench sleeves currently used in this fastening system have certain problems in practical applications. First, traditional pneumatic wrench sleeves have a significant drawback: their steel or iron wire connectors are not strong enough and are prone to breakage. This directly leads to repeated shutdowns and replacements during maintenance operations, making the process time-consuming and labor-intensive. This not only increases maintenance costs and difficulty but also seriously hinders overall operational efficiency.

[0005] Secondly, the traditional design of the hole structure for the mating of the pneumatic wrench sleeve and the bolt head often uses a conventional hexagonal inner hole. The contact between this structure and the bolt head is concentrated at the corners. During long-term, high-frequency torque transmission, the corners of the inner wall of the hole are prone to friction with the bolt head, leading to accelerated wear within the hole. Over time, the fit between the worn hole and the bolt head decreases significantly, not only reducing the stability of torque transmission and affecting the quality of bolt tightening and loosening operations, but also causing excessive wear on the bolt head. Utility Model Content

[0006] To address the aforementioned issues, this utility model provides a pneumatic wrench sleeve that enables locking and allows for quick disassembly and installation of the locking structure. The bolt connection hole is an irregularly shaped hole adapted for bolt tightening, thus preventing bolt wear. An ejector spring is installed inside the bolt tightening hole, enabling the bolt to quickly disengage from the bolt tightening hole.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A pneumatic wrench sleeve includes a first cylinder and a second cylinder. The second cylinder is disposed at the lower end of the first cylinder. An annular groove is disposed on the outer surface of the first cylinder. Locking structure mounting holes are disposed at both ends of the annular groove. A locking structure is installed in the locking structure mounting holes. The locking structure includes an end screw, a locking spring, and a boss. The locking spring is sleeved on the front of the end screw. One end of the locking spring is connected to the end screw, and the other end of the spring is connected to the boss.

[0008] As a further technical solution, the front part of the end screw is a spring mounting section, which is used to install a locking spring.

[0009] As a further technical solution, the inner wall surface of the locking structure mounting hole is provided with internal threads, and the other end of the spring mounting section is a threaded section.

[0010] As a further technical solution, a circular groove is provided at one end of the threaded section, and the end screw is an internal hexagon screw. The locking structure is screwed out of the locking structure mounting hole by the internal hexagon screw.

[0011] As a further technical solution, a wrench shaft connection hole is provided on the upper part of the first cylinder body, the locking structure connection hole is connected to the wrench shaft connection hole, and the boss end of the locking structure is located in the wrench shaft connection hole.

[0012] As a further technical solution, a spring mounting groove is provided inside the second cylinder, and one end of the spring mounting groove is connected to the wrench shaft connection hole.

[0013] As a further technical solution, the other end of the spring mounting groove is connected to the irregular hole.

[0014] As a further technical solution, an ejector spring is provided in the spring mounting groove, and one end of the ejector spring is connected to the bottom surface of the spring mounting groove.

[0015] As a further technical solution, the other end of the ejector spring is located inside the irregular hole.

[0016] As a further technical solution, the inner surface of the irregular hole is composed of a plane and a circular arc surface.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are: The spring mounting section at the front of the end screw in this utility model provides a stable assembly base for the locking spring. The two ends of the locking spring are respectively connected to the end screw and the boss. The end of the boss extends into the wrench shaft connection hole. When used with a motorized wrench, the boss can engage with the wrench shaft groove under the action of the locking spring to achieve reliable locking and ensure the connection stability during torque transmission. At the same time, the inner wall of the mounting hole of the locking structure is connected to the threaded section of the end screw through a threaded engagement, and the end of the end screw is provided with a hexagonal groove. When it is necessary to replace or repair the locking-related parts, the end screw can be unscrewed from the mounting hole by inserting an adapter tool into the hexagonal groove, thereby achieving quick disassembly of the locking structure without the need to process the entire socket, reducing tool maintenance costs. This invention features a shaped hole within the second cylinder as a mating structure for bolt tightening. The inner surface of this shaped hole comprises both a flat surface and a curved surface, allowing for a closer contact with the bolt head. This differs from the traditional method where the inner hole only contacts the bolt head through sharp edges. The contact area is dispersed from concentrated sharp edges to multiple areas formed by the flat and curved surfaces, reducing bolt head wear. Simultaneously, a push-out spring located in the spring mounting groove within the second cylinder applies a pushing force to the bolt after tightening or loosening, quickly disengaging it from the shaped hole and enabling rapid bolt installation. Attached Figure Description The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is a structural schematic diagram of the air cannon sleeve of this utility model; Figure 2 This is a cross-sectional view of the pneumatic wrench sleeve of this utility model. Figure 1 ; Figure 3 This is a cross-sectional view of the pneumatic wrench sleeve of this utility model. Figure 2 ; In the diagram: 1. First cylinder body; 2. Second cylinder body; 3. Wrench shaft connection hole; 4. Annular groove; 5. Locking structure mounting hole; 6. Locking structure; 61. End screw; 611. Hexagonal groove; 612. Threaded section; 613. Spring mounting section; 62. Locking spring; 63. Boss; 7. Ejector spring; 8. Spring mounting groove; 9. Irregular hole; 91. Flat surface; 92. Arc surface. Detailed Implementation It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] The traditional pneumatic wrench sleeves currently used in this fastening system have certain problems in practical applications. First, traditional pneumatic wrench sleeves have a significant drawback: their steel or iron wire connectors are not strong enough and are prone to breakage. This directly leads to repeated shutdowns and replacements during maintenance operations, making the process time-consuming and labor-intensive. This not only increases maintenance costs and difficulty but also seriously hinders overall operational efficiency.

[0020] Secondly, the traditional design of the hole structure for the mating of the pneumatic wrench sleeve and the bolt head often uses a conventional hexagonal inner hole. The contact between this structure and the bolt head is concentrated at the corners. During long-term, high-frequency torque transmission, the corners of the inner wall of the hole are prone to friction with the bolt head, leading to accelerated wear within the hole. Over time, the fit between the worn hole and the bolt head decreases significantly, not only reducing the stability of torque transmission and affecting the quality of bolt tightening and loosening operations, but also causing excessive wear on the bolt head.

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a pneumatic wrench sleeve, such as... Figure 1 As shown, it includes a first cylindrical body 1 and a second cylindrical body 2. The second cylindrical body 2 is provided at the lower end of the first cylindrical body 1. An annular groove 4 is provided on the outer surface of the first cylindrical body 1. Locking structure mounting holes 5 are provided at both ends of the annular groove 4. Locking structure 6 is installed in the locking structure mounting holes 5. The locking structure 6 includes an end screw 61, a locking spring 62 and a boss 63. The locking spring 62 is sleeved on the front of the end screw 61. One end of the locking spring 62 is connected to the end screw 61, and the other end of the spring is connected to the boss 63.

[0022] Specifically, the spring mounting section 613 at the front of the screw provides a stable mounting base for the locking spring 62. The two ends of the locking spring 62 are connected to the end screw 61 and the boss 63, respectively. The end of the boss 63 extends into the wrench shaft connection hole 3. When used with a motorized wrench, the boss 63 can engage with the wrench shaft groove under the action of the locking spring 62 to achieve reliable locking and ensure connection stability during torque transmission. At the same time, the inner wall of the locking structure mounting hole 5 is connected to the threaded section 612 of the end screw 61 through thread engagement. The end of the end screw 61 is provided with a hexagonal groove 611. When it is necessary to replace or repair the locking-related components, the end screw 61 can be unscrewed from the mounting hole by inserting an adapter tool into the hexagonal groove 611, thereby achieving quick disassembly of the locking structure 6 without the need to process the entire socket, reducing tool maintenance costs. The front part of the end screw 61 is a spring mounting section 613, which is used to install the locking spring 62. The inner wall of the locking structure mounting hole 5 is provided with internal threads, and the other end of the spring mounting section 613 is a threaded section 612 with external threads. The end screw 61 is threadedly connected to the locking structure mounting hole 5.

[0023] Specifically, when assembling the locking structure 6, the locking spring 62 can be directly sleeved on the spring mounting section 613, so that one end of the locking spring 62 is connected to the end screw 61, and the other end is connected to the boss 63, thereby achieving stable assembly of the locking spring 62 on the end screw 61.

[0024] The inner wall of the locking structure mounting hole 5 is pre-machined with internal threads, which are compatible with the external threads of the threaded section 612 of the end screw 61. During assembly, the end screw 61, which is fitted with the locking spring 62 and the boss 63, is aligned with the locking structure mounting hole 5. The threaded section 612 is tightened by engaging with the thread of the mounting hole to complete the installation and fixation of the locking structure 6. The threaded connection method ensures the stability of the locking structure 6 after assembly.

[0025] One end of the end screw 61 is provided with a hexagonal groove 611, which is used to unscrew the locking structure 6 out of the locking structure mounting hole 5.

[0026] Specifically, when it is necessary to disassemble the locking structure 6, a tool adapted to the hexagonal slot 611 is inserted into the end screw 61. By applying rotational force through the tool, the end screw 61 can be screwed out along the internal thread of the locking structure mounting hole 5, thereby removing the entire locking structure 6 from the mounting hole, which facilitates the replacement of components such as the locking spring 62 and the boss 63.

[0027] The upper part of the first cylinder body 1 is provided with a wrench shaft connection hole 3, the connection hole of the locking structure 6 is connected to the wrench shaft connection hole 3, and the end of the boss 63 of the locking structure 6 is located inside the wrench shaft connection hole 3.

[0028] Specifically, the wrench shaft connecting hole 3 on the upper part of the first cylinder body 1 is used to cooperate with the wrench shaft of the motorized wrench. The locking structure mounting hole 5 is connected to the wrench shaft connecting hole 3, so that the end of the boss 63 in the locking structure 6 away from the locking spring 62 can extend into the wrench shaft connecting hole 3. When the wrench shaft of the motorized wrench is inserted into the wrench shaft connecting hole 3, the boss 63 engages with the groove on the surface of the wrench shaft under the elastic force of the locking spring 62, realizing the rapid locking of the pneumatic wrench sleeve and the motorized wrench, ensuring the stable transmission of torque during operation.

[0029] The second cylinder body 2 is provided with a spring mounting groove 8, one end of which is connected to the wrench shaft connecting hole 3. The other end of the spring mounting groove 8 is connected to the irregular hole 9. An ejector spring 7 is provided in the spring mounting groove 8, one end of which is connected to the bottom surface of the spring mounting groove 8.

[0030] Specifically, the ejector spring 7 is installed in the spring mounting groove 8, with one end abutting against the bottom surface of the spring mounting groove 8 and the other end inside the irregular hole 9. After the bolt head enters the irregular hole 9 and completes the tightening and loosening operation, the ejector spring 7 can apply an axial thrust to the bolt head with its own elastic restoring force, pushing the bolt to quickly disengage from the irregular hole 9, thus preventing the bolt from sticking to the inner wall of the irregular hole 9.

[0031] The other end of the ejector spring 7 is located inside the irregular hole 9. The inner surface of the irregular hole 9 consists of a plane 91 and an arc surface 92.

[0032] Specifically, a shaped hole 9 is provided inside the second cylinder 2 as a mating structure for bolt tightening. The inner surface of the shaped hole 9 consists of a flat surface 91 and an arc surface 92. The structure of the shaped hole 9 can form a closer contact fit with the bolt head, changing the traditional method where the inner hole only contacts the bolt head through the edges. This disperses the contact area from the concentrated edge area to multiple areas formed by the flat surface 91 and the arc surface 92, reducing wear on the bolt head. At the same time, in conjunction with the ejector spring 7 provided in the spring mounting groove 8 inside the second cylinder 2, after the bolt tightening operation is completed, the ejector spring 7 can apply a pushing force to the bolt, pushing the bolt to quickly disengage from the shaped hole 9, realizing rapid bolt installation.

[0033] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A pneumatic wrench sleeve, characterized in that, The device includes a first cylindrical body and a second cylindrical body. The second cylindrical body is located at the lower end of the first cylindrical body. An annular groove is provided on the outer surface of the first cylindrical body. Locking structure mounting holes are provided at both ends of the annular groove. A locking structure is installed in the locking structure mounting holes. The locking structure includes an end screw, a locking spring, and a boss. A locking spring is sleeved on the front of the end screw. One end of the locking spring is connected to the end screw, and the other end of the spring is connected to the boss.

2. The pneumatic wrench sleeve as described in claim 1, characterized in that, The front part of the end screw is a spring mounting section, which is used to install a locking spring.

3. The pneumatic wrench sleeve as described in claim 2, characterized in that, The inner wall of the locking structure mounting hole is provided with an internal thread, and the other end of the spring mounting section is a threaded section.

4. A pneumatic wrench sleeve as described in claim 3, characterized in that, One end of the end screw is provided with a hexagonal groove, which is used to unscrew the locking structure out of the locking structure mounting hole.

5. A pneumatic wrench sleeve as described in claim 1, characterized in that, The upper part of the first cylinder is provided with a wrench shaft connection hole, the locking structure connection hole is connected to the wrench shaft connection hole, and the boss end of the locking structure is located inside the wrench shaft connection hole.

6. A pneumatic wrench sleeve as described in claim 1, characterized in that, The second cylinder body is provided with a spring mounting groove, one end of which is connected to the wrench shaft connection hole.

7. A pneumatic wrench sleeve as described in claim 6, characterized in that, The other end of the spring mounting slot is connected to the irregular hole.

8. A pneumatic wrench sleeve as described in claim 7, characterized in that, An ejector spring is provided in the spring mounting slot, and one end of the ejector spring is connected to the bottom surface of the spring mounting slot.

9. A pneumatic wrench sleeve as described in claim 8, characterized in that, The other end of the ejector spring is located inside the irregular hole.

10. A pneumatic wrench sleeve as described in claim 9, characterized in that, The inner surface of the irregular hole consists of a plane and a circular arc surface.

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