Inflatable shaft convenient to position

Abstract

The utility model discloses an air expansion shaft convenient to position, which comprises an air expansion shaft body and a connecting outer pipe, an air hole is arranged in the air expansion shaft body, two ends of the air expansion shaft body are respectively provided with a connector, an air inlet and an air outlet are respectively arranged in the two connectors and communicated with the air hole, and the air inlet and the air outlet are communicated with the air hole. The ball of the positioning mechanism rolls along the sliding groove until the ball rolls into the limiting hole, the inflatable shaft body is limited, at the moment, the inflatable key is right opposite to the key groove, high-pressure gas is introduced into the gas hole through the gas inlet to jack up and expand the inflatable key, the outer edge of the inflatable key expands and enters the key groove, and then the inflatable shaft body is fixed. When disassembly and replacement are needed, the high-pressure gas in the gas hole is discharged only by opening the gas release port, the gas expansion key automatically contracts and is separated from the key groove, the gas expansion shaft body and the connection outer pipe can be separated by applying a certain force, transmission is stable, and connection and disassembly are convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic shafts, in particular to a pneumatic shaft which is convenient for positioning. Background Art

[0002] The inflatable shaft is a special winding and unwinding shaft, that is, the surface can bulge after being inflated with high pressure, and the surface part quickly retracts after being deflated. It is called an inflatable shaft. When in use, just point the air gun at the air nozzle on the inflatable shaft to inflate it, and hold the external parts (such as round paper tubes). When you need to release the paper to unload, press the air nozzle by hand to slide the external parts (such as round paper tubes) out. It is widely used.

[0003] However, the existing gas expansion shaft cannot be directly positioned during use, so the gas expansion key cannot be matched with the keyway quickly and accurately, resulting in inconvenience in installation and disassembly.

[0004] Therefore, it is necessary to provide an inflatable shaft that is easy to position to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an inflatable shaft that is easy to position, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an inflatable shaft that is easy to position, comprising an inflatable shaft body and a connecting outer tube, an air hole being opened in the inflatable shaft body, connecting heads being arranged at both ends of the inflatable shaft body, an air inlet and an air discharge port being respectively opened in the two connecting heads and being connected to the air hole, a plurality of mounting grooves being opened on the outer circumferential surface of the inflatable shaft body, an inflatable key being arranged in the mounting groove, three positioning holes being evenly opened on the outer circumferential surface of the inflatable shaft body, a positioning mechanism being arranged in the positioning hole, the connecting outer tube being sleeved on the outer circumferential surface of the inflatable shaft body, a mounting hole being opened in the middle part of the connecting outer tube, a plurality of key grooves being opened on the inner wall of the mounting hole, the plurality of key grooves corresponding one-to-one to the plurality of mounting grooves, three slide grooves being evenly opened on the inner wall of the mounting hole, and a limiting hole being opened at the bottom of the slide groove.

[0007] As a preferred technical solution of the utility model, the plurality of mounting grooves are divided into three groups, the three groups of mounting grooves are evenly distributed on the outer circumferential surface of the inflatable shaft body, and each group of mounting grooves includes two mounting grooves.

[0008] As a preferred technical solution of the utility model, the plurality of key slots are divided into three groups, the three groups of key slots are evenly distributed on the inner wall of the mounting hole, and each group of key slots includes two key slots.

[0009] As a preferred technical solution of the utility model, the slide groove is an arc groove, and a straight line formed by the slide groove on the inner wall of the mounting hole and a straight line formed by a group of key grooves on the inner wall of the mounting hole have a certain angle.

[0010] As a preferred technical solution of the utility model, there is a certain angle between the position of the positioning hole on the outer circumferential surface of the inflatable shaft body and the line connecting the positions of a group of mounting grooves on the outer circumferential surface of the inflatable shaft body.

[0011] As a preferred technical solution of the utility model, the positioning mechanism includes a fixed column and a slider, the fixed column is arranged at the bottom of the positioning hole, a sliding hole and a through hole are opened in the fixed column, the through hole is located above the sliding hole and the through hole is connected to the sliding hole, the top of the through hole is a frustum-shaped structure, the top of the fixed column is a spherical structure, the slider is slidably arranged in the sliding hole, a placement groove is opened at the bottom of the slider, a spring is arranged between the placement groove and the bottom of the sliding hole, a spherical groove is opened at the top of the slider, a ball is rolled on the spherical groove, and the top of the ball extends to the outside of the fixed column.

[0012] As a preferred technical solution of the utility model, the cross-sectional structure of the gas expansion key is arc-shaped, and an air groove is provided on the arc-shaped surface of the gas expansion key close to the air hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses an inflatable shaft which is convenient for positioning. The utility model pushes the inflatable shaft body into the mounting hole of the connecting outer tube so that the ball of the positioning mechanism rolls along the slide groove until the ball rolls into the limiting hole. Since the top of the ball is not subjected to force, the slide block is pushed to slide along the slide hole under the action of the spring, and then the ball is pushed into the limiting hole to limit the inflatable shaft body. At this time, the inflatable key is directly opposite to the key groove, and high-pressure gas is introduced into the air hole through the air inlet to push the inflatable key up and expand. The outer edge of the inflatable key expands and enters the key groove, so that the connecting outer tube and the inflatable shaft body are key-connected together, and the two are synchronously rotated. The positioning is accurate and fast. When disassembly and replacement are required, only the air vent needs to be opened to discharge the high-pressure gas in the air hole, and the inflatable key automatically shrinks and disengages from the key groove. A certain force can be applied to separate the inflatable shaft body and the connecting outer tube. The transmission is stable, and the connection and disassembly are convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a sectional view of the overall structure of the utility model;

[0018] Figure 3 It is a three-dimensional schematic diagram of the main structure of the inflatable shaft of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the connecting outer tube structure of the utility model;

[0020] Figure 5 It is a three-dimensional schematic diagram of the positioning mechanism structure of the utility model;

[0021] Figure 6 It is a three-dimensional schematic diagram of the gas expansion key structure of the utility model.

[0022] In the figure: 1. Inflatable shaft body; 11. Air hole; 12. Connector; 13. Air inlet; 14. Mounting groove; 15. Positioning hole; 16. Air vent; 2. Connecting outer tube; 21. Mounting hole; 22. Slide groove; 23. Keyway; 24. Limiting hole; 3. Positioning mechanism; 3. Positioning mechanism; 31. Fixed column; 311. Slide hole; 32. Sliding block; 321. Spherical groove; 322. Placement groove; 33. Spring; 34. Ball; 4. Inflatable key. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, in order to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0024] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0025] like Figures 1 to 6As shown, an inflatable shaft for convenient positioning includes an inflatable shaft body 1 and a connecting outer tube 2, wherein an air hole 11 is opened in the inflatable shaft body 1, and connectors 12 are arranged at both ends of the inflatable shaft body 1, and an air inlet 13 and an air outlet 16 are respectively opened in the two connectors 12 to communicate with the air hole 11, which are used to ventilate and deflate the air hole 11, and a plurality of mounting grooves 14 are opened on the outer circumferential surface of the inflatable shaft body 1, and the plurality of mounting grooves 14 are divided into three groups, and the three groups of mounting grooves 14 are evenly distributed on the outer circumferential surface of the inflatable shaft body 1, and each group of mounting grooves 14 includes two mounting grooves 1 4. An air key 4 is arranged in the mounting groove 14. The cross-sectional structure of the air key 4 is arc-shaped. An air groove 41 is provided on the arc-shaped surface of the air key 4 close to the air hole 11. Ventilation to the air groove 41 can expand the air key 4 outward from the mounting groove 14. Three positioning holes 15 are evenly provided on the outer circumferential surface of the air shaft body 1. The positions of the positioning holes 15 on the outer circumferential surface of the air shaft body 1 and the line formed by the positions of a group of mounting grooves 14 on the outer circumferential surface of the air shaft body 1 have a certain angle. A positioning mechanism 3 is arranged in the positioning hole 15. The positioning mechanism 3 is used to limit the air shaft body 1.

[0026] The connecting outer tube 2 is sleeved on the outer circumferential surface of the inflatable shaft body 1, and a mounting hole 21 is opened in the middle of the connecting outer tube 2. A plurality of key grooves 23 are opened on the inner wall of the mounting hole 21. The plurality of key grooves 23 are divided into three groups. The three groups of key grooves 23 are evenly distributed on the inner wall of the mounting hole 21. Each group of the key grooves 23 includes two key grooves 23. The plurality of key grooves 23 correspond one to one with the plurality of mounting grooves 14. Three sliding grooves 22 are evenly opened on the inner wall of the mounting hole 21. The sliding grooves 22 are arc grooves. The straight line formed by the sliding grooves 22 on the inner wall of the mounting hole 21 has a certain angle with the straight line formed by a group of key grooves 23 on the inner wall of the mounting hole 21. A limiting hole 24 is opened at the bottom of the sliding groove 22. The limiting hole 24 is used to cooperate with the positioning mechanism 3 to limit the inflatable shaft body 1.

[0027] The positioning mechanism 3 includes a fixed column 31 and a slider 32. The fixed column 31 is arranged at the bottom of the positioning hole 15. A sliding hole 311 and a through hole 312 are provided in the fixed column 31. The through hole 312 is located above the sliding hole 311 and the through hole 312 is connected to the sliding hole 311. The top of the through hole 312 is a frustum-shaped structure. The top of the fixed column 31 is a spherical structure. The slider 32 is slidably arranged in the sliding hole 311. A placement groove 322 is provided at the bottom of the slider 32. A spring 33 is provided between the placement groove 322 and the bottom of the sliding hole 311. A spherical groove 321 is provided at the top of the slider 32. A ball 34 is rolled on the spherical groove 321. The top of the ball 34 extends to the outside of the fixed column 31. The ball 34 can roll along the sliding groove 2 2 rolls at the arc bottom, and when the ball 34 rolls into the limiting hole 24, the slider 32 is pushed to slide along the sliding hole 311 under the action of the spring 33, and then the ball 34 is pushed into the limiting hole 24 to limit the inflatable shaft body 1. At this time, the inflatable key 4 is opposite to the key slot 23, and high-pressure gas is introduced into the air hole 11 through the air inlet 13 to push the inflatable key 4 up and expand, and the outer edge of the inflatable key 4 expands and enters the key slot 23, so that the connecting outer tube 2 and the inflatable shaft body 1 are key-connected together to achieve synchronous rotation of the two. When disassembly and replacement are required, only the air vent 16 needs to be opened to discharge the high-pressure gas in the air hole 11, and the inflatable key 4 automatically shrinks and disengages from the key slot 23. A certain force can be applied to separate the inflatable shaft body 1 and the connecting outer tube 2, with stable transmission and convenient and fast connection and disassembly.

[0028] The specific implementation method is as follows: by pushing the inflatable shaft body 1 deep into the mounting hole 21 of the connecting outer tube 2, the ball 34 of the positioning mechanism 3 rolls along the slide groove 22 until the ball 34 rolls into the limiting hole 24. Since the top of the ball 34 is not subjected to force, the slider 32 is pushed to slide along the slide hole 311 under the action of the spring 33, and then the ball 34 is pushed into the limiting hole 24 to limit the inflatable shaft body 1. At this time, the inflatable key 4 is opposite to the key groove 23, and the high-pressure gas is introduced into the air hole 11 through the air inlet 13 to push the inflatable key 4 up and expand. The outer edge of the inflatable key 4 expands and enters the key groove 23, so that the connecting outer tube 2 and the inflatable shaft body 1 are key-connected together to achieve synchronous rotation of the two. When disassembly and replacement are required, only the air vent 16 needs to be opened to discharge the high-pressure gas in the air hole 11, and the inflatable key 4 automatically shrinks and disengages from the key groove 23. A certain force can be applied to separate the inflatable shaft body 1 and the connecting outer tube 2. The transmission is stable and the connection and disassembly are convenient and fast.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An inflatable shaft that is easy to position, comprising an inflatable shaft body (1) and a connecting outer tube (2), characterized in that: The inflatable shaft body (1) is provided with an air hole (11), and both ends of the inflatable shaft body (1) are provided with connectors (12). The two connectors (12) are provided with air inlets (13) and air outlets (16) respectively, which are connected with the air hole (11). The outer circumferential surface of the inflatable shaft body (1) is provided with a plurality of mounting grooves (14), and the mounting grooves (14) are provided with inflatable keys (4). The outer circumferential surface of the inflatable shaft body (1) is evenly provided with three positioning holes (15). A positioning mechanism (3) is arranged in the positioning hole (15); the connecting outer tube (2) is sleeved on the outer circumferential surface of the inflatable shaft body (1); a mounting hole (21) is provided in the middle of the connecting outer tube (2); a plurality of key grooves (23) are provided on the inner wall of the mounting hole (21); the plurality of key grooves (23) correspond to the plurality of mounting grooves (14) in a one-to-one manner; three slide grooves (22) are evenly provided on the inner wall of the mounting hole (21); and a limiting hole (24) is provided at the bottom of the slide groove (22).

2. The inflatable shaft for convenient positioning according to claim 1, characterized in that: The plurality of mounting grooves (14) are divided into three groups. The three groups of mounting grooves (14) are evenly distributed on the outer circumferential surface of the inflatable shaft body (1). Each group of mounting grooves (14) includes two mounting grooves (14).

3. The inflatable shaft for convenient positioning according to claim 1, characterized in that: The plurality of key slots (23) are divided into three groups. The three groups of key slots (23) are evenly distributed on the inner wall of the mounting hole (21), and each group of key slots (23) includes two key slots (23).

4. The inflatable shaft for convenient positioning according to claim 1, characterized in that: The slide groove (22) is an arc-shaped groove, and a straight line formed by the slide groove (22) on the inner wall of the mounting hole (21) and a straight line formed by a group of key grooves (23) on the inner wall of the mounting hole (21) have a certain angle.

5. The inflatable shaft for convenient positioning according to claim 1, characterized in that: There is a certain angle between the position of the positioning hole (15) on the outer circumferential surface of the inflatable shaft body (1) and the line formed by connecting the positions of a group of mounting grooves (14) on the outer circumferential surface of the inflatable shaft body (1).

6. The inflatable shaft for convenient positioning according to claim 1, characterized in that: The positioning mechanism (3) comprises a fixed column (31) and a slider (32). The fixed column (31) is arranged at the bottom of the positioning hole (15). A sliding hole (311) and a through hole (312) are provided in the fixed column (31). The through hole (312) is located above the sliding hole (311) and is connected to the sliding hole (311). The top of the through hole (312) is a frustum-shaped structure. The top of the fixed column (31) is a spherical structure. The slider (32) is slidably arranged in the sliding hole (311). A placement groove (322) is provided at the bottom of the slider (32). A spring (33) is provided between the placement groove (322) and the bottom of the sliding hole (311). A spherical groove (321) is provided at the top of the slider (32). A ball (34) is rolled on the spherical groove (321). The top of the ball (34) extends to the outside of the fixed column (31).

7. The inflatable shaft for convenient positioning according to claim 1, characterized in that: The cross-sectional structure of the gas expansion key (4) is arc-shaped, and an air groove (41) is provided on the arc-shaped surface of the gas expansion key (4) close to the air hole (11).

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