Piston type inflatable shaft

Abstract

The utility model relates to the technical field of air expansion shafts, and discloses a piston type air expansion shaft which comprises an air expansion shaft body, supporting plates are arranged at the two ends of the air expansion shaft body, a bottom plate is arranged between the two supporting plates, a two-way screw is rotationally connected between the two supporting plates, one end of the two-way screw penetrates through one supporting plate and is provided with a rotating handle, and the other end of the two-way screw penetrates through the other supporting plate. The outer surface of the two-way screw is in threaded connection with two limiting assemblies, and a fixing assembly is arranged on the upper surface of the supporting plate. By rotating the rotating handle, the rotating handle drives the two-way screw rod to rotate, so that the two connecting plates move towards the ends close to each other, and in the moving process of the connecting plates, the limiting blocks are pushed through the connecting rods to synchronously move towards the ends close to the winding drum; when the air expansion shaft is used, the rotating handle stops rotating, the winding drum can be limited to the center of the air expansion shaft body at the moment, the good limiting effect is achieved, and axial deviation of the winding drum in the using process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic shafts, in particular to a piston-type pneumatic shaft. Background Art

[0002] A pneumatic shaft, also known as an air expansion shaft, is a winding and unwinding shaft. It is an axial structure used to roll and unwind rolled materials. It is widely used in various fields, such as winding battery electrodes, winding prism sheets, and winding roll paper. The shaft is pushed outward to expand to achieve tension, and the shaft retracts inward to unload.

[0003] The utility model patent application document with publication number "CN220596678U" discloses a piston-type pneumatic expansion shaft, which is mainly composed of a sleeve, an inner shaft, a piston, an air chamber, a shaft head, an air nozzle assembly, a spring and a tensioning key. The technical solution has a sophisticated mechanical structure. The tensioning key is pushed out or retracted by the movement of the piston, which can tighten or release the inner hole wall of the paper roll or film roll, and there is no need to use low-strength materials such as rubber to make parts. It has a long service life and can work stably for a long time.

[0004] The piston-type pneumatic shaft disclosed in the above document has the following defects: during use, the piston-type pneumatic shaft pushes the tensioning key to pop out and tighten the inner wall of the paper roll through the movement of the piston, thereby fixing the position of the paper roll on the pneumatic shaft. However, during long-term use, when the outer surface of the tensioning key wears or there is insufficient gas in the air chamber, the tensioning key does not fit tightly against the inner wall of the roll, causing the roll to deviate axially on the pneumatic shaft during rotation, thereby affecting the winding effect of the roll.

[0005] It can be seen from this that the existing piston-type pneumatic shaft does not have a structure for limiting the axial deviation of the reel, and it is necessary to improve the existing shortcomings and provide a piston-type pneumatic shaft. Utility Model Content

[0006] The purpose of the present utility model is to provide a piston-type pneumatic shaft to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The utility model is a piston-type inflatable shaft, comprising an inflatable shaft body, support plates are provided at both ends of the inflatable shaft body, a bottom plate is provided between the two support plates, a bidirectional screw is rotatably connected between the two support plates, one end of the bidirectional screw passes through one of the support plates and is installed with a rotating handle, the outer surface of the bidirectional screw is threadedly connected to two groups of limit assemblies, and a fixing assembly is provided on the upper surface of the support plate.

[0009] Furthermore, the limiting assembly includes a connecting plate, the outer surface of the bidirectional screw is threadedly connected to the connecting plate, one end of the connecting plate is provided with a connecting rod, the outer surface of the connecting rod is installed with a bearing, the upper surface of the base plate is provided with a first slide groove, the lower end of the connecting plate is provided with a slider, and the slider is slidably connected to the inside of the first slide groove.

[0010] Furthermore, the outer surface of the inflatable shaft body is slidably connected to a limit block, one end of the limit block is provided with a groove, and the interior of the groove is rotatably connected to a bearing.

[0011] Furthermore, the fixing assembly includes a first fixing block, a connecting block is provided on the lower surface of the first fixing block, one end of the connecting block is provided with a mounting groove, a second slide groove is provided inside the mounting groove, a slide is slidably connected to the inside of the second slide groove, one end of the slide is installed with a first spring, the other end of the first spring is installed on the inner surface of the second slide groove, a baffle is installed inside the mounting groove, one end of the slide is provided with a second fixing block, the upper surface of the support plate is provided with a placement groove and a mounting hole, the inner surface of the placement groove is provided with a limiting groove, one end of the mounting hole passes through the limiting groove and extends downward, the other end of the mounting hole passes through the first fixing block and extends upward, and the interior of the placement groove is cooperated with and installed with a connecting block.

[0012] Furthermore, one end of the second fixing block passes through the baffle and is fitted inside the limiting slot. A sliding rod is slidably connected inside the mounting hole, and a top plate is provided on the upper surface of the sliding rod.

[0013] Furthermore, a groove is provided on the upper surface of the first fixing block, a sleeve is installed inside the groove, a second spring is installed inside the sleeve, a support rod is installed at the other end of the second spring, and a top plate is installed at the other end of the support rod.

[0014] The utility model has the following beneficial effects:

[0015] (1) The utility model rotates the rotary handle to drive the bidirectional screw to rotate, so that the two connecting plates move toward one end close to each other. During the movement of the connecting plates, the limit block is pushed by the connecting rod to move synchronously toward the end close to the reel. When the end of the limit block abuts the end of the reel, the rotary handle is stopped. At this time, the reel can be restricted to the center of the inflatable shaft body, achieving a better limiting effect and avoiding axial displacement of the reel during use.

[0016] (2) The utility model can limit the two ends of the inflatable shaft body to the upper surface of the support plate by setting the first fixed block, so as to prevent the inflatable shaft from falling off during the rotation process. At the same time, by pushing the top plate downward, the top plate moves downward, the support rod moves downward in the sleeve, the second spring gradually shrinks, and the slide rod slides downward in the mounting hole and squeezes the second fixed block, so that the second fixed block gradually detaches from the inside of the limiting groove. When the second fixed block is completely detached from the limiting groove, the outer surface of the second fixed block is flush with the outer surface of the baffle. Holding the first fixed block and pulling the first fixed block upward, the connecting block gradually detaches from the inside of the placement groove, thereby canceling the fixation of the first fixed block to the support plate, making it easier for the inflatable shaft body to be removed from the support plate, achieving a better practical effect.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is an exploded view of the overall structure of the utility model;

[0021] Figure 3 This is an exploded view of the fixed component structure of the utility model;

[0022] Figure 4 This is a cross-sectional view of the support plate and fixing assembly structure of the utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] In the figure: 1. Pneumatic shaft body; 2. Support plate; 201. Placement slot; 202. Mounting hole; 203. Limiting slot; 3. Bottom plate; 301. First slide slot; 4. Bidirectional screw; 5. Rotating handle; 6. Limiting assembly; 601. Connecting plate; 602. Connecting rod; 603. Bearing; 604. Limiting block; 7. Fixing assembly; 701. First fixing block; 702. Connecting block; 703. Mounting slot; 704. Second slide slot; 705. Slide plate; 706. First spring; 707. Baffle; 708. Second fixing block; 709. Slide rod; 7010. Top plate; 7011. Sleeve; 7012. Second spring; 7013. Support rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 - Figure 4 As shown, the utility model is a piston-type pneumatic shaft, comprising a pneumatic shaft body 1, support plates 2 are provided at both ends of the pneumatic shaft body 1, a bottom plate 3 is provided between the two support plates 2, a bidirectional screw 4 is rotatably connected between the two support plates 2, one end of the bidirectional screw 4 passes through one of the support plates 2 and is installed with a rotating handle 5, two sets of limit assemblies 6 are threadedly connected to the outer surface of the bidirectional screw 4, and a fixing assembly 7 is provided on the upper surface of the support plate 2;

[0027] The limiting assembly 6 includes a connecting plate 601, the outer surface of the bidirectional screw 4 is threadedly connected to the connecting plate 601, one end of the connecting plate 601 is provided with a connecting rod 602, the outer surface of the connecting rod 602 is mounted with a bearing 603, the upper surface of the bottom plate 3 is provided with a first slide groove 301, the lower end of the connecting plate 601 is provided with a slider, and the slider is slidably connected to the inside of the first slide groove 301;

[0028] The outer surface of the inflatable shaft body 1 is slidably connected to a limit block 604. One end of the limit block 604 is provided with a groove, and the interior of the groove is rotatably connected to a bearing 603.

[0029] Before use, first place the reel on the outer surface of the inflatable shaft body 1, and then place the two limit blocks 604 on the two ends of the inflatable shaft body 1 respectively. After installing the limit blocks 604, place the two ends of the inflatable shaft body 1 on the support plate 2, and rotate the rotary handle 5 so that the rotary handle 5 drives the bidirectional screw 4 to rotate, so that the two connecting plates 601 move toward one end close to each other. During the movement of the connecting plates 601, the limit blocks 604 are pushed by the connecting rod 602 to move synchronously toward the end close to the reel. When the end of the limit block 604 abuts against the end of the reel, stop rotating the rotary handle 5. At this time, the reel can be restricted to the center of the inflatable shaft body 1, achieving a better limiting effect and avoiding axial displacement of the reel during use.

[0030] The fixing assembly 7 includes a first fixing block 701, a connecting block 702 is provided on the lower surface of the first fixing block 701, a mounting groove 703 is provided at one end of the connecting block 702, a second sliding groove 704 is provided inside the mounting groove 703, a slide plate 705 is slidably connected to the inside of the second sliding groove 704, a first spring 706 is installed at one end of the slide plate 705, the other end of the first spring 706 is installed on the inner surface of the second sliding groove 704, a baffle 707 is installed inside the mounting groove 703, a second fixing block 708 is provided at one end of the slide plate 705, a placement groove 201 and a mounting hole 202 are provided on the upper surface of the support plate 2, a limiting groove 203 is provided on the inner surface of the placement groove 201, one end of the mounting hole 202 passes through the limiting groove 203 and extends downward, the other end of the mounting hole 202 passes through the first fixing block 701 and extends upward, and the interior of the placement groove 201 is cooperated with the connecting block 702;

[0031] One end of the second fixing block 708 passes through the baffle 707 and is fitted into the limiting groove 203. A sliding rod 709 is slidably connected to the interior of the mounting hole 202. A top plate 7010 is provided on the upper surface of the sliding rod 709.

[0032] A groove is formed on the upper surface of the first fixing block 701. A sleeve 7011 is fitted inside the groove. A second spring 7012 is fitted inside the sleeve 7011. A support rod 7013 is fitted at the other end of the second spring 7012. A top plate 7010 is fitted at the other end of the support rod 7013.

[0033] When the second locking cam 708 is in the closed position, the locking cam 708 is in the closed position, and the first and second locking cams 706 are in the closed position, so that the second and second locking cams 708 are in the closed position.

[0034] When the inflatable shaft body 1 needs to be removed from the support plate 2, the top plate 7010 is pushed downward to move the top plate 7010 downward, the support rod 7013 moves downward in the sleeve 7011, the second spring 7012 gradually contracts, and at the same time the sliding rod 709 slides downward in the mounting hole 202 and displaces the second fixing block 708, so that the second fixing block 708 gradually disengages from the inside of the limiting groove 203. When the second fixing block 708 is completely out of the limiting groove 203, the outer surface of the second fixing block 708 is flush with the outer surface of the baffle 707. Hold the first fixing block 701 and pull the first fixing block 701 upward, so that the connecting block 702 gradually disengages from the inside of the placement groove 201, thereby causing the first fixing block 701 to cancel the fixation of the support plate 2, and then the inflatable shaft body 1 can be removed from the support plate 2.

[0035] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A piston-type pneumatic shaft, comprising a pneumatic shaft body (1), characterized in that: Support plates (2) are provided at both ends of the inflatable shaft body (1), a bottom plate (3) is provided between the two support plates (2), and a bidirectional screw (4) is rotatably connected between the two support plates (2); One end of the bidirectional screw (4) passes through one of the support plates (2) and is provided with a rotating handle (5). The outer surface of the bidirectional screw (4) is threadedly connected to two sets of limiting components (6). The upper surface of the support plate (2) is provided with a fixing component (7).

2. The piston-type inflatable shaft according to claim 1, characterized in that: The limiting assembly (6) includes a connecting plate (601), the outer surface of the bidirectional screw (4) is threadedly connected to the connecting plate (601), one end of the connecting plate (601) is provided with a connecting rod (602), and the outer surface of the connecting rod (602) is installed with a bearing (603); A first sliding groove (301) is provided on the upper surface of the bottom plate (3), and a slider is provided at the lower end of the connecting plate (601), and the slider is slidably connected to the inside of the first sliding groove (301).

3. The piston-type inflatable shaft according to claim 1, characterized in that: The outer surface of the inflatable shaft body (1) is slidably connected to a limit block (604), one end of the limit block (604) is provided with a groove, and the interior of the groove is rotatably connected to a bearing (603).

4. The piston-type inflatable shaft according to claim 1, characterized in that: The fixing assembly (7) includes a first fixing block (701), a connecting block (702) is provided on the lower surface of the first fixing block (701), a mounting groove (703) is provided at one end of the connecting block (702), a second slide groove (704) is provided inside the mounting groove (703), a slide plate (705) is slidably connected inside the second slide groove (704), a first spring (706) is installed at one end of the slide plate (705), and the other end of the first spring (706) is installed on the inner surface of the second slide groove (704); A baffle (707) is installed inside the installation groove (703), and a second fixing block (708) is provided at one end of the slide plate (705); The upper surface of the support plate (2) is provided with a placement groove (201) and a mounting hole (202); the inner surface of the placement groove (201) is provided with a limiting groove (203); one end of the mounting hole (202) passes through the limiting groove (203) and extends downward; the other end of the mounting hole (202) passes through the first fixing block (701) and extends upward; the interior of the placement groove (201) is cooperatively installed with a connecting block (702).

5. The piston-type inflatable shaft according to claim 4, characterized in that: One end of the second fixing block (708) passes through the baffle (707) and is mounted inside the limiting groove (203). A sliding rod (709) is slidably connected inside the mounting hole (202), and a top plate (7010) is provided on the upper surface of the sliding rod (709).

6. The piston-type inflatable shaft according to claim 4, characterized in that: A groove is provided on the upper surface of the first fixing block (701), a sleeve (7011) is installed in the interior of the groove, a second spring (7012) is installed in the interior of the sleeve (7011), a support rod (7013) is installed at the other end of the second spring (7012), and a top plate (7010) is installed at the other end of the support rod (7013).

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