Mechanical inflatable shaft

Abstract

The utility model discloses a mechanical inflatable shaft, and aims to overcome the defects that the weight upper limit of an object hoisted by an air bag type inflatable shaft is lower and the reliability is poorer. The utility model comprises a piston part and an air expansion part, the air expansion part comprises a shaft tube, a shaft core, sliding blocks and an outer pressing plate, the shaft core is slidably connected in the shaft tube, the sliding blocks are slidably connected on the shaft tube along the radial direction, the sliding blocks are arranged on the shaft tube along the circumferential direction at equal intervals, and the sliding blocks are fixedly connected with the outer pressing plate and are matched with the shaft core in a wedge angle mode. And the piston part drives the shaft core to axially displace in the shaft tube. The shaft core is matched with the wedge angle of the sliding block, the radial displacement of the sliding block and the outer pressing block is achieved through the axial displacement of the shaft core, and therefore the sliding block abuts against or is separated from the inner wall of the reel, and high-strength and high-reliability positioning and positioning releasing are achieved.

Description

Technical Field

[0001] The utility model relates to a winding device, and more particularly to a mechanical pneumatic shaft. Background Art

[0002] The reel is used to reel in and out materials. It is very heavy and requires a lot of labor to carry manually. It is also easy to bump into things during loading and unloading.

[0003] Therefore, most of the handling in this industry is done by robots.

[0004] During the handling process of the robot, some coils cannot be clamped using the outer wall and can only be carried by expanding and supporting the inner wall.

[0005] Most existing technologies use airbag-type inflatable shafts for transportation. However, for overly heavy reels, the airbag-type inflatable shafts are either unable to lift the reels or are prone to slipping.

[0006] The present application aims to address the shortcomings of airbag-type inflatable shafts, such as low upper limit of weight for lifting objects and poor reliability, and propose a mechanical inflatable shaft to improve the weight and stability of the inflatable reel. Summary of the Invention

[0007] The present application aims to address the shortcomings of airbag-type inflatable shafts, such as low upper limit of weight for lifting objects and poor reliability, and propose a mechanical inflatable shaft to improve the weight and stability of the inflatable reel.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A mechanical pneumatic shaft includes a piston part and an pneumatic part. The pneumatic part includes a shaft tube, a shaft core, a slider and an outer pressure plate. The shaft core is slidably connected to the shaft tube. The slider is slidably connected to the shaft tube along the radial direction. The sliders are arranged on the shaft tube at equal intervals along the circumferential direction. The sliders are fixedly connected to the outer pressure plate and cooperate with the shaft core wedge angle. The piston part drives the shaft core to axially displace in the shaft tube.

[0010] The piston part is used to drive the shaft core to move, thereby pushing the slider, and realizing the axial movement of the shaft core in a wedge angle matching manner to drive the slider to extend in the radial direction, so that the outer pressure plate abuts the inner wall of the reel, and realizes reliable positioning by friction.

[0011] The shaft tube provides the freedom to position the shaft core and slider, allowing the shaft core to move only axially and the slider to move only radially. The shaft core is driven by the piston, pushing it relative to the shaft tube. The slider is fixedly connected to the outer pressure plate, and its radial displacement drives the outer pressure plate in sync.

[0012] The wedge angle combination can achieve force amplification. By setting a smaller wedge angle, a force-saving lever can be achieved, which sacrifices the axial movement stroke to amplify the force, obtains greater support force for the reel to be positioned, increases the upper limit of the weight of the hoisted object and improves reliability.

[0013] Preferably, the sidewall of the sleeve is provided with sliding holes, into which the sliders slide. Three groups of sliding holes are provided circumferentially, with each group comprising two sliding holes axially. Each group of sliding holes and its corresponding slider corresponds to an external pressure plate. The corresponding sliding holes in each group are fixed near the ends of the external pressure plate along its length, ensuring uniform force distribution and avoiding localized stress concentration that could affect the lifespan of the inflatable shaft.

[0014] Preferably, the shaft core is provided with a plurality of parallel wedge surfaces in the axial direction, with the inclined surface of the bottom of the slider mating with the wedge surfaces. The wedge surfaces cooperate with the inclined surface of the slider to achieve axial feed and radial displacement of the slider. By setting a small wedge angle, a force-saving lever is achieved, thereby amplifying the thrust of the piston corresponding to the wedge angle, thereby applying greater pressure to the spool and generating greater friction.

[0015] Preferably, the shaft core is further provided with an inclined groove parallel to the wedge surface, and the slider is provided with a guide block that is slidably connected to the inclined groove. The cooperation between the inclined groove and the guide block ensures that the slider can always ensure that the wedge surface and the inclined surface are in contact, thereby preventing the slider from being extended when the shaft core is at zero position.

[0016] Preferably, the surface of the outer pressure plate is provided with friction lines, which further enhance the friction force of the outer pressure plate against the inner wall of the reel.

[0017] Preferably, the piston portion includes a piston flange and a piston, the piston being fixedly connected to the shaft core, and a first air inlet being provided on a side of the piston flange that is opposite the piston and away from the shaft core. In the present application, the thrust applied to the shaft core is equal to the product of the piston's air pressure and its surface area, and the piston portion is responsible for generating the thrust applied to the shaft core.

[0018] Preferably, a second air inlet hole is provided on the side of the piston flange relative to the piston and close to the shaft core. Said configuration generates a pulling force to pull back the shaft core, thereby resetting the device.

[0019] Preferably, a cover plate is provided at one end of the shaft tube remote from the piston flange, and an elastic member is installed between the inner wall of the shaft tube, the cover plate, and the shaft core, the elastic member being configured to drive the shaft core back into position. The cover plate and the elastic member generate a thrust on the shaft core, enabling the elastic force to push the shaft core back into position after the air pressure in the piston returns to normal.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] By coordinating the wedge angles between the shaft core and the slider, and using the axial displacement of the shaft core to achieve radial displacement of the slider and the outer pressure block, they abut against or disengage from the inner wall of the reel, achieving high-strength and high-reliability positioning and positioning release. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the utility model;

[0023] Figure 2 It is a front view of the utility model;

[0024] Figure 3 yes Figure 2 Cross-section at AA in the middle;

[0025] Figure 4 yes Figure 2 Cross-section at the middle BB;

[0026] Figure 5 It is an exploded view of the utility model;

[0027] Figure 6 This is a schematic diagram of the wedge angle amplification of the present invention;

[0028] In the picture:

[0029] Shaft tube 1, shaft core 2, slider 3, outer pressure plate 4, sliding hole 5, wedge surface 6, inclined surface 7, friction pattern 8, piston flange 9, piston 10, first air inlet hole 11, second air inlet hole 12, cover plate 13, elastic member 14, inclined groove 15, guide block 16. DETAILED DESCRIPTION

[0030] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure, and should not be understood as limitations on the present disclosure.

[0034] In this disclosure, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meaning of these terms in this disclosure based on specific circumstances, and they should not be construed as limiting this disclosure.

[0035] Example:

[0036] A mechanical air shaft, Figures 1 to 3 As shown, it includes a piston 10 and an inflatable part. The inflatable part includes a shaft tube 1, a shaft core 2, a slider 3 and an outer pressure plate 4. The shaft core 2 is slidably connected to the shaft tube 1. The slider 3 is radially slidably connected to the shaft tube 1. The slider 3 is arranged on the shaft tube 1 at equal intervals along the circumferential direction. The slider 3 is fixedly connected to the outer pressure plate 4 and is wedge-angled with the shaft core 2. The piston 10 drives the shaft core 2 to axially displace in the shaft tube 1.

[0037] Ginseng Figure 3 、 5 As shown, the sidewall of the sleeve is provided with sliding holes 5, which retain the slider 3. The slider 3 slides in the sliding holes 5. There are three groups of sliding holes 5 in the circumferential direction, and each group of sliding holes 5 includes two sliding holes 5 in the axial direction. Each group of sliding holes 5 and the corresponding slider 3 are associated with an external pressure plate 4. The corresponding sliding holes 5 in each group of sliding holes 5 are fixed near the ends of the external pressure plate 4 in the longitudinal direction, thereby ensuring uniform force distribution and avoiding localized stress concentration that affects the service life of the inflatable shaft.

[0038] The outer pressure plate 4 is an arc-shaped plate. Friction grooves 8 are provided on its surface. These grooves further enhance the friction between the outer pressure plate 4 and the inner wall of the reel. The friction grooves 8 are evenly spaced along the axial direction. In some embodiments, the friction grooves 8 are formed by lathing along the arcuate surface of the outer pressure plate 4. The lathing is shaped into a right triangle, with the hypotenuse closer to the piston 10, i.e., the fixed end of the device.

[0039] Ginseng Figure 3As shown, the piston 10 includes a piston flange 9 and a piston 10. The piston 10 is fixedly connected to the shaft core 2. The piston flange 9 is provided with a first air inlet 11 on the side of the piston 10 away from the shaft core 2. The thrust of the present application on the shaft core 2 is equal to the product of the air pressure of the piston 10 and the surface area of ​​the piston 10. The piston 10 is responsible for generating the thrust on the shaft core 2.

[0040] In some embodiments, a second air inlet 12 is provided on the side of the piston flange 9 relative to the piston 10 close to the shaft core 2. This configuration generates a pulling force to pull back the shaft core 2, thereby resetting the device. In other embodiments, a cover plate 13 is provided on the end of the shaft tube 1 away from the piston flange 9, and an elastic member 14 is installed between the inner wall of the shaft tube 1, the cover plate 13, and the shaft core 2. The elastic member 14 is configured to drive the shaft core 2 to reset. The cover plate 13 and the elastic member 14 generate a thrust on the shaft core 2, so that the shaft core 2 is pushed back to its original position by the elastic force after the air pressure in the piston 10 returns to normal pressure.

[0041] Ginseng Figure 3 、 5 As shown in Figure 6, the shaft core 2 is provided with several wedge surfaces 6 in the axial direction. The wedge surfaces 6 are parallel to each other, and the inclined surface 7 at the bottom of the slider 3 cooperates with the wedge surfaces 6. The shaft core 2 realizes the axial feed and radial displacement of the slider 3 by cooperating with the wedge surfaces 6 and the inclined surface 7 of the slider 3. By setting a smaller wedge angle, a force-saving lever is realized, thereby amplifying the thrust of the piston 10 corresponding to the wedge angle, thereby providing greater pressure on the reel, generating greater friction, and obtaining greater support for the reel to be positioned, thereby increasing the upper limit of the weight of the hoisted object and improving reliability. The shaft core 2 is also provided with an inclined groove 15 parallel to the wedge surfaces 6, and the slider 3 is provided with a guide block 16, which is slidably connected to the inclined groove 15. Through the cooperation of the inclined groove 15 and the guide block 16, the slider 3 can always ensure that the wedge surface 6 and the inclined surface 7 are in contact, avoiding the slider 3 being in an extended state when the shaft core 2 is in the zero position.

[0042] Ginseng Figure 6 As shown, specifically, the formula for the wedge angle amplification of force is: , where k is the amplified radial force, P1 is the axial force, and α is the wedge angle.

[0043] The piston 10 is used to drive the shaft core 2 to move, thereby pushing the slider 3. In a wedge-angle fit, the shaft core 2 moves in the axial direction to drive the slider 3 to extend in the radial direction, so that the outer pressure plate 4 abuts the inner wall of the reel, achieving reliable positioning by friction.

[0044] The shaft tube 1 provides the freedom to position the shaft core 2 and slider 3, allowing the shaft core 2 to move only in the axial direction and the slider 3 to move only in the radial direction. The shaft core 2 is driven by the piston 10, which pushes it to move relative to the shaft tube 1. The slider 3 is fixedly connected to the outer pressure plate 4, and during its radial displacement, it drives the outer pressure plate 4 to move synchronously.

[0045] The use process of this device is:

[0046] Air is introduced into the first air inlet 11, and the pressure on one side of the piston 10 is greater than that on the other side, so the piston 10 advances;

[0047] The shaft core 2 fixedly connected to the piston 10 moves, and the wedge surface 6 on the shaft core 2 cooperates with the inclined surface 7 of the slider 3, driving the slider 3 to move radially outward;

[0048] The outer pressure plate 4 fixedly connected to the slider 3 extends outward synchronously to achieve positioning of the reel.

[0049] When resetting, the first air inlet 11 releases air and the second air inlet 12 takes air in, or the first air inlet 11 returns to normal pressure and is pushed by the elastic member 14, so that the shaft core 2 is reset;

[0050] During the resetting process, the shaft core 2 is cooperated with the guide block 16 and the inclined groove 15, and the slider 3 is pulled back when resetting, so that it is retracted synchronously and finally reaches the zero position at the same time.

[0051] The above-described embodiments are only preferred solutions of the present invention and do not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A mechanical inflatable shaft, characterized in that: It includes a piston part and an inflatable part. The inflatable part includes a shaft tube, a shaft core, a slider and an outer pressure plate. The shaft core is slidably connected to the shaft tube. The slider is radially slidably connected to the shaft tube. The slider is arranged on the shaft tube at equal intervals along the circumferential direction. The slider is fixedly connected to the outer pressure plate and cooperates with the wedge angle of the shaft core. The piston part drives the shaft core to axially displace in the shaft tube.

2. A mechanical inflatable shaft according to claim 1, characterized in that: Sliding holes are provided on the side wall of the shaft sleeve, and the sliders are slidably connected in the sliding holes. The number of the sliding holes in the circumferential direction is three groups, and each group of sliding holes includes two sliding holes in the axial direction.

3. The mechanical inflatable shaft according to claim 1, characterized in that: The shaft core is provided with a plurality of wedge surfaces in the axial direction, the wedge surfaces are parallel, and the inclined surface at the bottom of the sliding block matches the wedge surfaces.

4. A mechanical inflatable shaft according to claim 3, characterized in that: An inclined groove parallel to the wedge surface is also provided on the shaft core, and a guide block is provided on the slider, which is slidably connected in the inclined groove.

5. The mechanical inflatable shaft according to claim 1, characterized in that: The surface of the outer pressure plate is provided with friction lines.

6. The mechanical inflatable shaft according to claim 1, characterized in that: The piston part comprises a piston flange and a piston. The piston is fixedly connected to the shaft core. A first air inlet hole is provided on a side of the piston flange that is opposite to the piston and away from the shaft core.

7. A mechanical inflatable shaft according to claim 6, characterized in that: A second air inlet hole is provided on a side of the piston flange relative to the piston and close to the shaft core.

8. The mechanical inflatable shaft according to claim 6, characterized in that: A cover plate is provided at one end of the shaft tube away from the piston flange, and an elastic member is installed between the inner wall of the shaft tube, the cover plate and the shaft core, and the elastic member is configured to drive the shaft core to reset.

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