Jackhammer with replaceable sleeve

Abstract

The utility model provides a jack wrench with replaceable sleeves, which comprises a base, a jack wrench body arranged on the base and a plurality of sleeves arranged corresponding to the jack wrench body, the plurality of sleeves form a surrounding structure around the same axis, and the sleeves rotate around the surrounding axis. The two ends of the sleeve are provided with a movable transmission connector and a movable driving connector respectively, and the movable transmission connector and the movable driving connector are connected with the pneumatic hammer body or the bolt in a sleeved mode. The multiple sleeves arranged in a surrounding mode are driven to rotate through the mounting frame, the sleeves are connected with the pneumatic hammer body or the bolts in a sleeving mode, the sleeves can be replaced for use, the work of automatically replacing the sleeves can also be achieved for a large pneumatic hammer, manual carrying and assembling are not needed, the work complexity is reduced, and the efficiency is improved; meanwhile, the size of a corresponding bolt is changed by replacing the whole sleeve, an internal deformable structure does not exist, the overall structural strength is greatly improved, and the bolt cannot be damaged when a high-torsion pneumatic hammer is used for construction.

Description

Technical Field

[0001] This utility model relates to the field of air gun sleeve technology, and in particular to an air gun with replaceable sleeve. Background Technology

[0002] An air impact wrench, also known as a pneumatic wrench, is a combination of a ratchet wrench and a power tool. It's primarily a tool that provides high torque output with minimal power consumption. It uses a continuous power source to accelerate an object of mass, causing it to spin and strike a shaft, thus generating a large torque output. This causes the impeller to rotate, producing rotational power. The impeller then drives the connected striking part in a hammer-like motion, tightening or loosening screws with each strike. Compressed air is the most common power source, but electric or hydraulic wrenches are also available, and battery-powered torque wrenches are popular. Air impact wrenches are widely used in many industries, such as automotive repair, heavy equipment maintenance, product assembly, major construction projects, installing wire thread inserts, and anywhere else where high torque output is needed.

[0003] A socket is an essential component for installing and removing bolts with an impact wrench. The socket is essentially a cylindrical wrench; one end connects to the output end of the impact wrench, and the other end fits over the bolt through a hexagonal hole, thus transmitting the impact wrench's power to the bolt for installation and removal. However, because bolts come in various sizes, it's typically necessary to carry a large number of sockets with different output diameters for different bolts. This causes significant inconvenience when processing equipment with various bolt sizes. Therefore, impact wrench devices with interchangeable socket interfaces have been developed.

[0004] In some large-scale impact wrenches, due to their large size, they require the assistance of a support frame for operation, resulting in correspondingly large sleeve sizes. Changing sleeves in these impact wrenches requires multiple people, causing further inconvenience. Furthermore, currently available impact wrenches with interchangeable sleeve interface specifications typically use deformable structures to change the shape of the sleeve interface. This method works normally in small impact wrenches, but in large impact wrenches, due to the extremely high torque generated during operation, this deformable structure is easily damaged. Therefore, the only solution is to change the sleeve size. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a replaceable sleeve air gun, which solves the problem that existing technologies cannot use deformable structures to adjust the sleeve structure size of large air guns, and can only replace the sleeve with bolts of different specifications, resulting in a complicated replacement process and many inconveniences.

[0006] According to an embodiment of this utility model, a replaceable sleeve air gun includes a base, an air gun body disposed on the base, and a plurality of sleeves disposed corresponding to the air gun body. The base is also provided with a mounting frame. The sleeves are movably disposed on the mounting frame, so that the plurality of sleeves form a ring structure around the same axis, and the sleeves are parallel to the ring axis. The sleeves can rotate around the ring axis on the mounting frame, so that each sleeve moves sequentially to a position coaxial with the air gun body. Each end of the sleeve is provided with a movable transmission connector and a drive connector, which can slide axially relative to the sleeve. The mounting frame is also provided with a drive device, which is connected to both the transmission connector and the drive connector and controls the movement of the transmission connector and the drive connector, so that they are respectively engaged with the air gun body or bolts.

[0007] Furthermore, a support rod is vertically provided on one end surface of the base, and the air gun body is fixedly installed on the top of the support rod so that it is parallel to the surface of the base.

[0008] Furthermore, the mounting bracket includes a rotating shaft arranged parallel to the central axis of the air gun body. Support rods are rotatably connected to both ends of the rotating shaft. The support rods are fixedly connected to the surface of the base, so that the rotating shaft is arranged parallel to the base. A power component is also provided on the support rod to drive the rotating shaft to rotate. The sleeve is arranged around the rotating shaft and is movably connected to the rotating shaft.

[0009] Furthermore, two sliding rings are respectively fitted on both ends of the sleeve corresponding to the outer side of the rotating shaft. A connecting rod is provided radially on the outer side of the sliding ring, which is connected to the transmission connector and the drive connector at both ends of the sleeve respectively. The driving device drives the sliding ring to move along the axial direction of the rotating shaft, thereby driving the transmission connector and the drive connector to slide along the axial direction of the sleeve.

[0010] Furthermore, the driving device includes a connecting block fixedly disposed outside the rotating shaft. The connecting block is provided with telescopic rods that are opposite in direction and parallel to the rotating shaft. One end of the telescopic rod is fixedly connected to the connecting block, and the other end is fixedly connected to the sliding ring.

[0011] Furthermore, the drive connector and the sleeve are rotatably connected, and the drive connector can only rotate in one direction. The drive connector and the connecting rod are rotatably connected, so that when the connecting rod drives the drive connector to move, it does not affect the rotation of the drive connector relative to the sleeve.

[0012] Furthermore, the outer end of the drive connector is provided with a collar, which is a flared shape with the diameter expanding outwards. The collar has a spiral pattern inside, so that the collar and the drive connector rotate simultaneously along the spiral pattern.

[0013] Furthermore, the outer wall of the sleeve corresponding to the transmission connector is provided with several axial guide rails, and the inner wall of the transmission connector is provided with several sliders corresponding to the guide rails. The sliders are slidably connected to the guide rails, so that the transmission connector can only move axially via the guide rails.

[0014] Furthermore, the inner wall of the drive connector is provided with a surrounding ratchet, and a rotating bar is rotatably installed on the inner wall of the sleeve corresponding to the drive connector. A torsion spring is provided on the rotation shaft of the rotating bar so that the rotating bar always rotates in the opposite direction of the ratchet. A stop is also provided on one side of the rotating bar, which allows the rotating bar to rotate only to a state perpendicular to the outer wall of the sleeve.

[0015] Furthermore, the power assembly includes a motor mounted on the support rod, the output shaft of the motor being parallel to the rotating shaft, and a drive gear being provided at the output end of the motor. A driven gear meshing with the drive gear is sleeved on the rotating shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention uses a mounting bracket to drive several surrounding sleeves to rotate. Depending on the usage requirements, sleeves of different specifications can be rotated to their corresponding coaxial positions on the air jet body. Then, a drive device moves the transmission connector and drive connector, allowing them to engage with the air jet body or bolts, thus enabling sleeve replacement. This structure, using a base and mounting bracket to set up the air jet body and sleeves, allows for automated sleeve replacement even with large air jets, eliminating the need for manual handling and assembly, greatly reducing work complexity and improving efficiency. Furthermore, this invention changes the size of the corresponding bolt by replacing the entire sleeve, eliminating internal deformable structures and significantly improving overall structural strength, preventing damage during high-torque air jet operations. Attached Figure Description

[0018] Figure 1 This is a side view of an embodiment of the present utility model.

[0019] Figure 2 This is a cross-sectional schematic diagram of the transmission connector and sleeve in an embodiment of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the drive connector and sleeve in an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the drive connector and collar in an embodiment of this utility model.

[0022] In the above attached figures: 1. Base; 2. Air gun body; 3. Mounting bracket; 4. Sleeve; 5. Transmission connector; 6. Drive connector; 7. Connecting block; 8. Ring; 11. Support rod; 31. Rotating shaft; 32. Support rod; 41. Guide rail; 42. Rotating bar; 43. Stop block; 51. Slider; 61. Ratchet; 71. Telescopic rod; 311. Sliding ring; 312. Connecting rod. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 As shown in the figure, this utility model embodiment proposes a replaceable sleeve 4 type air gun, including a base 1, an air gun body 2 disposed on the base 1, and multiple sleeves 4 disposed corresponding to the air gun body 2. In this embodiment, the base 1 is horizontally disposed, and a support rod 11 is vertically disposed on one end surface of the base 1. The air gun body 2 is fixedly disposed on the top of the support rod 11, making it parallel to the surface of the base 1. The base 1 is also provided with a mounting frame 3, and the sleeves 4 are movably disposed on the mounting frame 3, so that multiple sleeves 4 form a ring structure around the same axis, and the sleeves 4 are parallel to the ring axis. The sleeves 4 can rotate around the ring axis on the mounting frame 3, so that each sleeve 4 moves sequentially to a position coaxial with the air gun body 2.

[0025] The sleeve 4 is provided with movable transmission connector 5 and drive connector 6 at both ends. The transmission connector 5 and drive connector 6 can slide axially relative to the sleeve 4. The mounting bracket 3 is also provided with a drive device. The drive device is connected to both the transmission connector 5 and drive connector 6 and controls the movement of the transmission connector 5 and drive connector 6 so that they are respectively connected to the air gun body 2 or bolts.

[0026] In the specific design, the mounting frame 3 includes a rotating shaft 31 parallel to the central axis of the air jet body 2. Support rods 32 are rotatably connected to both ends of the rotating shaft 31. The support rods 32 are fixedly connected to the surface of the base 1, allowing the rotating shaft 31 to be positioned parallel to the base 1 above it. A power assembly is also provided on the support rods 32 to drive the rotating shaft 31 to rotate. A sleeve 4 surrounds the rotating shaft 31 and is movably connected to it. Correspondingly, two sliding rings 311 are respectively fitted onto the outer ends of the rotating shaft 31 and the sleeve 4. Connecting rods 312 are radially arranged on the outer sides of the sliding rings 311, connecting to the transmission connectors 5 and drive connectors 6 at both ends of the sleeve 4, respectively. The driving device drives the sliding rings 311 to move axially along the rotating shaft 31, thereby causing the transmission connectors 5 and drive connectors 6 to slide axially along the sleeve 4. It should be noted that in this embodiment, the connecting rods 312 are connected to the transmission connectors 5 and drive connectors 6 via rotating bearings, thus ensuring that the rotation of the transmission connectors 5 and drive connectors 6 is not affected while driving axial movement.

[0027] like Figure 2 As shown, the outer wall of the sleeve 4 corresponding to the transmission connector 5 is provided with a plurality of axial guide rails 41, and the inner wall of the transmission connector 5 is provided with a plurality of sliders 51 corresponding to the guide rails 41. The sliders 51 are slidably connected to the guide rails 41, so that the transmission connector 5 can only move axially through the guide rails 41.

[0028] Preferably, the power assembly includes a motor mounted on the support rod 32, the output shaft of which is parallel to the rotating shaft 31, and a drive gear is also provided at the output end of the motor. A driven gear meshing with the drive gear is sleeved on the rotating shaft 31. The motor drives the rotating shaft 31 to rotate by passing through the drive gear and the driven gear in sequence.

[0029] Furthermore, the driving device includes a connecting block 7 fixedly mounted outside the rotating shaft 31. The connecting block 7 is provided with telescopic rods 71 ​​that are opposite in direction and parallel to the rotating shaft 31. One end of each telescopic rod 71 is fixedly connected to the connecting block 7, and the other end is fixedly connected to the sliding ring 311. It should be noted that when the driving device moves the transmission connector 5 and the drive connector 6 inwards, both the transmission connector 5 and the drive connector 6 retract to a position where their ends do not exceed the rotating shaft 31, preventing them from being blocked by the support rod 32 during rotation. When the driving device controls the transmission connector 5 and the drive connector 6 to extend outwards, the outer ends of both the transmission connector 5 and the drive connector 6 exceed the length of both ends of the rotating shaft 31, allowing them to extend out of the rotating surface of the rotating shaft 31 and connect to the air gun body 2 or via bolts.

[0030] Preferably, in this embodiment, the drive connector 6 and the sleeve 4 are also rotatably connected, and the drive connector 6 can only rotate in one direction. The drive connector 6 and the connecting rod 312 are rotatably connected, so that when the connecting rod 312 drives the drive connector 6 to move, it does not affect the rotation of the drive connector 6 relative to the sleeve 4. Figure 4 As shown, further, the outer end of the drive connector 6 is also provided with a collar 8. The collar 8 is a flared shape with its diameter expanding outwards, and the inside of the collar 8 has a spiral pattern, so that the collar 8 and the drive connector 6 rotate simultaneously along the spiral pattern. Considering that the sleeve 4 is installed on the base 1 in this embodiment and is not convenient to move, when the corresponding bolt needs to be fitted into the drive connector 6, after roughly aligning the position, the drive connector 6 is controlled to extend, so that the collar 8 is first fitted onto the outside of the bolt. Then the bolt abuts against the spiral pattern, so that the collar 8 and the drive connector 6 rotate along it until the bolt rotates to abut against the drive connector 6 and is inserted into the drive connector 6 to achieve fixation.

[0031] like Figure 3 As shown, in the specific solution, the inner wall of the drive connector 6 is provided with a surrounding ratchet 61, and the inner wall of the sleeve 4 corresponding to the drive connector 6 is rotatably mounted with a rotating bar 42. The rotating shaft of the rotating bar 42 is provided with a torsion spring, so that the rotating bar 42 always rotates in the opposite direction to the ratchet 61. A stop block 43 is also provided on one side of the rotating bar 42, and the stop block 43 ensures that the rotating bar 42 can only rotate to a state perpendicular to the outer wall of the sleeve 4. The rotation direction restricted by the ratchet 61 is consistent with the direction of the spiral pattern, so that the drive connector 6 can be rotated and fitted onto the outside of the bolt. At the same time, when the air hammer body 2 is working, it drives the sleeve 4 to rotate in the opposite direction. At this time, the ratchet 61 controls the drive connector 6 to be fixed relative to the sleeve 4, thereby completing the bolt installation work.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sleeve replaceable air cannon characterized by: The device includes a base, a blower body mounted on the base, and multiple sleeves corresponding to the blower body. The base also has a mounting frame. The sleeves are movably mounted on the mounting frame, forming a ring structure around the same axis, with the sleeves parallel to the axis. The sleeves can rotate around the axis on the mounting frame, allowing each sleeve to move sequentially to a position coaxial with the blower body. Each sleeve has a movable transmission connector and a drive connector at both ends, which can slide axially relative to the sleeve. The mounting frame also has a drive device connected to both the transmission connector and the drive connector, controlling their movement to engage with the blower body or bolts.

2. A sleeve-replaceable air-blast nozzle according to claim 1, characterized in that: A support rod is vertically arranged on one end surface of the base, and the air gun body is fixedly mounted on the top of the support rod so that it is parallel to the surface of the base.

3. A sleeve-replaceable air-blast nozzle as defined in claim 1, wherein: The mounting bracket includes a rotating shaft arranged parallel to the central axis of the air gun body. Support rods are rotatably connected to both ends of the rotating shaft. The support rods are fixedly connected to the surface of the base, so that the rotating shaft is arranged parallel to the base. A power component is also provided on the support rod to drive the rotating shaft to rotate. A sleeve is arranged around the rotating shaft and is movably connected to the rotating shaft.

4. A sleeve-replaceable air-blast nozzle as defined in claim 3, wherein: Two sliding rings are respectively fitted on both ends of the sleeve corresponding to the outer side of the rotating shaft. A connecting rod is provided radially on the outer side of the sliding ring, which is connected to the transmission connector and the drive connector at both ends of the sleeve respectively. The driving device drives the sliding ring to move along the axial direction of the rotating shaft, thereby driving the transmission connector and the drive connector to slide along the axial direction of the sleeve.

5. A sleeve-replaceable air-blast nozzle as defined in claim 4, wherein: The driving device includes a connecting block fixedly installed outside the rotating shaft. The connecting block is provided with telescopic rods that are opposite in direction and parallel to the rotating shaft. One end of the telescopic rod is fixedly connected to the connecting block, and the other end is fixedly connected to the sliding ring.

6. A sleeve-replaceable air-blast nozzle as defined in claim 1, wherein: The drive connector and the sleeve are also rotatably connected, and the drive connector can only rotate in one direction. The drive connector and the connecting rod are rotatably connected, so that when the connecting rod drives the drive connector to move, it does not affect the rotation of the drive connector relative to the sleeve.

7. A sleeve-replaceable air-blast nozzle as defined in claim 6, wherein: The outer end of the drive connector is also provided with a collar, which is a flared shape with the diameter expanding outwards. The collar has a spiral pattern inside, so that the collar and the drive connector rotate simultaneously along the spiral pattern.

8. A sleeve-replaceable air-blast nozzle as defined in claim 1, wherein: The outer wall of the sleeve corresponding to the transmission connector is provided with several axial guide rails, and the inner wall of the transmission connector is provided with several sliders corresponding to the guide rails. The sliders are slidably connected to the guide rails, so that the transmission connector can only move axially via the guide rails.

9. A sleeve-replaceable air-blast nozzle as defined in claim 6, wherein: The inner wall of the drive connector is provided with a ratchet tooth, and a rotating bar is rotatably installed on the inner wall of the sleeve corresponding to the drive connector. A torsion spring is provided on the rotation shaft of the rotating bar so that the rotating bar always rotates in the opposite direction of the ratchet tooth. A stop block is also provided on one side of the rotating bar so that the rotating bar can only rotate to a state perpendicular to the outer wall of the sleeve.

10. A sleeve-replaceable air-blast nozzle as defined in claim 3, wherein: The power assembly comprises a motor arranged on the support rod, an output shaft of the motor is parallel to the rotating shaft, and the output end of the motor is further provided with a driving gear, and the rotating shaft is further provided with a driven gear engaged with the driving gear.

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