Convex key type inflatable shaft
The convex key type pneumatic shaft addresses uneven force distribution issues by using a thrust piece to counterbalance air bag pressure, ensuring stable key block ejection and preventing paper damage, thus extending the airbag's service life.
Patent Information
- Application Number
- CN202420143881.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-19
AI Technical Summary
Existing inflatable shafts in printing machines cause uneven force distribution due to the use of a soft airbag, leading to wrinkles, bending, and uneven pressure on key strips, resulting in a short service life and paper damage.
A convex key type pneumatic shaft with a shaft body, key blocks, an air intake shaft, an air bag, and a push plate mechanism, where a thrust piece provides counterforce to the air bag, ensuring uniform pressure distribution and stable ejection of key blocks.
The solution ensures uniform pressure distribution and stable ejection of key blocks, preventing paper damage and extending the service life of the airbag by maintaining consistent paper tension.
Smart Images
Figure CN222204377U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of pneumatic shafts, and in particular to a key-type pneumatic shaft. Background Art
[0002] At present, in the process of printing paper, because a lot of paper is produced and it is very long, a collection device is needed. At this time, an inflatable shaft is needed. It is a shaft used in a rewinding and unwinding machine. It uses an air bag to bulge the key strip in the shaft body to fix the paper. Its principle and structure are simple and it is very popular in the printing industry, but there are still some problems:
[0003] The existing inflatable shaft uses an entire airbag to push out the key strip. This use of a soft airbag to push the harder key strip will cause uneven force on various parts. Because the surface area of the airbag is larger than the key strip, there are many gaps between the airbag and the key strip. The airbag will be wrinkled and bent in these gaps. In this way, the airbag will not be usable for a long time and needs to be replaced, resulting in a short service life of the airbag.
[0004] The airbag is inflated at one end. In practice, due to the effect of air pressure, the air pressure changes from one end to the other end during inflation. This will cause the two ends of each key bar to not be subjected to the same pressure at the same time. In this way, due to a certain gap between the key bar and the shaft body, the key bar will have different heights at both ends, which will damage the paper wrapped on the shaft and make it unusable and wasted, while also affecting the efficiency of papermaking. Utility Model Content
[0005] In order to improve the problem of damage to paper wrapped around the shaft caused by different heights at both ends of the key block when it is pushed out, the present application provides a convex key type pneumatic shaft.
[0006] The present application provides a key-type air shaft, which adopts the following technical solution:
[0007] A convex key type air shaft, comprising:
[0008] A shaft body, wherein a plurality of key blocks are slidably connected along the outer wall of the shaft body;
[0009] The intake shaft is coaxially fixedly installed in the shaft body; an air bag is arranged on the outer ring of the intake shaft, and the intake pipe is used to inflate and deflate the air bag;
[0010] A push plate, which is slidably disposed between the inner wall of the shaft body and the air bag, and is used to move through the expansion of the air bag to push the key block to move;
[0011] The thrust piece is arranged between the push plate and the inner wall of the shaft body, and is used to apply a force to the push plate in the direction of the inflatable bag.
[0012] By adopting the above technical solution, an air intake shaft is arranged in the shaft body, and an air bag arranged on the outer ring of the air intake shaft is inflated through the air intake shaft. The thrust piece arranged on the push plate provides the push plate with a force in the opposite direction to the force provided by the air bag to the push plate. After the air bag is normally inflated, the push plate is not sufficient to overcome the force of the push piece to push the key block out of the shaft body. After the air bag is inflated, the air bag continues to expand, driving the push plate to push the key block out in parallel, thereby improving the problem of damage to the paper wrapped on the shaft caused by the different heights of the two ends of the key block when it is pushed out.
[0013] Optionally, the thrust piece is an elastic piece, and elastic pieces are provided at both ends of the thrust plate.
[0014] By adopting the above technical solution, the thrust piece is an elastic piece, and elastic pieces are provided at both ends of the push plate. The elastic piece can gradually advance the push plate according to the thrust of the inflatable bag on the push plate. At the same time, the elastic pieces are provided at both ends to make the push of the push plate on the key block more stable.
[0015] Optionally, a groove is provided on the inner wall of the shaft body, one end of the elastic member is fixed in the groove, and the other end is fixed on the push plate.
[0016] By adopting the above technical solution, the groove is opened on the inner wall of the shaft body, and the elastic member is fixedly connected to the inner wall of the shaft body and the push plate, so that the direction of the elastic member is not easy to change during the extension and retraction process, thereby improving the stability of the push plate pushing the key block.
[0017] Optionally, a groove is provided on the push plate, one end of the elastic member is fixed in the groove, and the other end is fixed to the inner wall of the shaft body.
[0018] By adopting the above technical solution, a groove can also be opened on the push plate, and the elastic member is fixedly connected to the inner wall of the shaft body and the push plate, so that the direction of the elastic member is not easily changed during the extension and retraction process, thereby improving the stability of the push plate pushing the key block.
[0019] Optionally, a driving rod is fixedly provided on the inner wall of the shaft body, the elastic member is a spring, and the driving rod runs through the elastic member, a guide hole is provided on the push plate, one end of the driving rod is fixed on the inner wall of the shaft body, and the other end passes through the guide hole.
[0020] By adopting the above technical solution, the push plate can move in the direction driven by the driving rod, and the driving rod limits the movement of the push plate, thereby improving the pushing stability of the push plate.
[0021] Optionally, an enlarged head is provided at one end of the driving rod where the driving rod passes through the guide hole, and a surface of the enlarged head facing the push plate can abut against the push plate.
[0022] By adopting the above technical solution, the enlarged head can be abutted against the surface of the push plate close to the inflatable bag, and the enlarged head cannot pass through the guide hole, so that the push rod is restricted to move between the enlarged head and the inner wall of the shaft body and cannot be pushed out from the driving rod.
[0023] Optionally, the key blocks are arranged in three rows in the circumferential direction of the shaft body, and three push plates and thrust members are also arranged. The push plates are used to push the key blocks in the same row to move at the same time.
[0024] By adopting the above technical solution, the key blocks are evenly arranged in three rows in the circumferential direction of the shaft body, so that the key blocks can provide a relatively uniform tightening thrust to the paper when ejecting, and the paper is not easily damaged.
[0025] Optionally, the intersection of the edge lines of the push plate is set to be rounded.
[0026] By adopting the above technical solution, the corners of the push plate are set as rounded corners, which can effectively protect the inflatable bag from being squeezed and damaged by the corners of the push plate when it contacts the push plate during the expansion process.
[0027] Optionally, the enlarged head is threaded onto the drive rod.
[0028] By adopting the above technical solution, the enlarged head can be detachably installed, which makes it convenient to replace and install the push plate.
[0029] Optionally, an inflation hole is provided on the air inlet shaft, and the inflation bag is provided with an inflation head, and the inflation head and the inflation hole are detachably connected, so that the air inlet shaft can be connected to the inflation bag.
[0030] By adopting the above technical solution, the air intake shaft can fill the air into the airbag, and the detachable connection can facilitate the replacement of the airbag when the airbag is damaged.
[0031] In summary, the present application includes at least one of the following beneficial effects:
[0032] 1. The setting of the push plate enables the inflatable bag to first push the push plate to move, and then the push plate pushes the key block, so that the key block can be ejected relatively parallel;
[0033] 2. The setting of the driving rod can limit the push plate, making the push plate move more stably;
[0034] 3. The rounded corners of the push plate can effectively protect the inflatable bag from being squeezed and damaged by the corners of the push plate when it contacts the push plate during the expansion process. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 This is a schematic diagram of the overall structure of a convex key type air shaft according to an embodiment of the present application;
[0036] Figure 2is a radial cross-sectional schematic diagram of an embodiment of the present application;
[0037] Figure 3 is an axial cross-sectional schematic diagram of an embodiment of the present application;
[0038] Figure 4 yes Figure 3 A magnified schematic diagram of center A.
[0039] Explanation of the accompanying drawings: 1. shaft body; 2. air inlet shaft; 21. inflation hole; 3. inflation bag; 31. inflation head; 4. push plate; 41. rounded corner; 42. guide hole; 5. key block; 6. roller shaft; 7. driving rod; 71. enlarged head; 8. groove; 9. elastic member. DETAILED DESCRIPTION
[0040] The following conclusion and attachment Figure 1-4 This application is described in further detail.
[0041] The present application discloses a key-type air shaft, referring to Figure 1 and Figure 2 The key-type inflatable shaft includes a shaft body 1, an air inlet shaft 2, an air bag 3 and a push plate 4. Three rows of key blocks 5 are arranged on the outer wall of the shaft body 1 around the axis of the shaft body 1 at intervals. Each row includes a plurality of key blocks 5. The key blocks 5 are slidably penetrated on the side wall of the shaft body 1, that is, the sliding direction of the key blocks 5 is the radial direction of the shaft body 1.
[0042] refer to Figure 2 and Figure 3 The shaft body 1 serves as the main body of the inflatable shaft, and a roller shaft 6 is fixedly installed at its end. The roller shaft 6 and the bearing are installed so that the shaft body 1 can rotate on the corresponding equipment. An air intake shaft 2 is coaxially fixedly installed in the shaft body 1, and an inflation hole 21 is opened on the air intake shaft 2. The air bag 3 is sleeved on the outer ring of the air intake shaft 2 and includes an inflation head 31 detachably connected to the inflation hole 21 on the air intake shaft 2. The detachable connection method allows the air bag 3 to be replaced in time when it is damaged. In the embodiment of the present application, the detachable connection is a threaded connection method.
[0043] refer to Figure 2 and Figure 4 There are three push plates 4 correspondingly arranged, and they are arranged between the inflatable bag 3 and the inner wall of the shaft body 1, one end is fitted with the surface of the key block 5 in the same row, and the other end is fitted with the inflatable bag 3, and the corners of the push plate 4 are all set to rounded corners 41. The setting of the rounded corners 41 can effectively protect the inflatable bag 3 from being easily squeezed and damaged by the corners of the push plate 4 when it contacts the push plate 4 during the expansion process; the push plate 4 and the key block 5 are adapted and fitted so that the inflatable bag 3 can push the push plate 4 more stably during the expansion process, and then the push plate 4 can push the key blocks 5 in the same row to protrude more stably.
[0044] Driving rods 7 are fixedly provided at both ends of the inner wall surface of the shaft body 1 in the axial direction, one end of the driving rod 7 is fixed on the inner wall surface of the shaft body 1, and the other end points to the axis of the shaft body 1. A guide hole 42 corresponding to the driving rod 7 is provided on the push plate 4, and the driving rod 7 is inserted into the guide hole 42 to provide support and limiting effects for the push plate 4. An enlarged head 71 is also detachably installed on the end of the driving rod 7 that passes through the push plate 4. In the embodiment of the present application, the detachable connection method is a threaded connection method. The enlarged head 71 can be abutted against the surface of the push plate 4 close to the inflatable bag 3, which makes it impossible for the enlarged head 71 to pass through the guide hole 42. The setting of the enlarged head 71 enables the push plate 4 to move only on the driving rod 7 between the enlarged head 71 and the inner wall of the shaft body 1, which plays a certain limiting role on the push plate 4.
[0045] A groove 8 is provided on the inner wall of the shaft body 1, and an elastic member 9 is fixedly arranged in the groove 8. In the embodiment of the present application, the elastic member 9 is a spring, and the spring is sleeved outside the driving rod 7, one end of which is connected to the groove 8, and the other end is connected to the push plate 4. The purpose of providing the elastic member 9 is to provide the push plate 4 with a force opposite to the force provided by the inflatable bag 3. During the inflation process of the inflatable bag 3, if you want to push the push plate 4, you must first overcome the elastic force provided by the elastic member 9 to the push plate 4. This means that the inflation needs to expand to a certain extent before the push plate 4 can be pushed to move. At this time, the gas distribution in the inflatable bag 3 is relatively uniform, and the push plate 4 can be pushed more evenly, thereby pushing the key block 5 to move.
[0046] In other embodiments of the present application, the groove 8 may also be provided on the push plate 4 , with one end of the spring fixedly connected to the groove 8 on the push plate 4 , and the other end of the spring fixedly connected to the inner wall of the shaft body 1 .
[0047] The implementation principle of a convex key inflatable shaft in the embodiment of the present application is as follows: when the convex key inflatable shaft is used, the air inlet shaft 2 located in the shaft body 1 is ventilated first, and the gas is sent into the inflatable bag 3 through the connection between the inflation hole 21 opened on the air inlet shaft 2 and the inflation head 31 arranged on the inflatable bag 3. The inflatable bag 3 gradually expands during the inflation process. When the inflation starts, the push plate 4 is difficult to push the push plate 4 due to the elastic force provided by the elastic member 9 to the push plate 4. After the gas in the inflatable bag 3 rushes into the push plate 4 evenly to a certain extent, the inflatable bag 3 is inflated again, and the inflatable bag 3 can overcome the elastic force of the elastic member 9 on the push plate 4, so that the push plate 4 can slide on the driving rod 7, and the push plate 4 pushes the key block 5 to bulge. At the same time, the corners of the push plate 4 are set to be rounded corners 41, which effectively protects the inflatable bag 3 from being easily squeezed by the corners of the push plate 4 when it contacts with the push plate 4 during the expansion process and causing damage.
[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A key-type air shaft, characterized in that: include: A shaft body (1), wherein the outer wall of the shaft body (1) is slidably connected to a plurality of key blocks (5) along its radial direction; An air intake shaft (2), the air intake shaft (2) being coaxially fixedly mounted inside the shaft body (1); an air bag (3) is arranged on the outer ring of the air intake shaft (2), and the air intake shaft (2) is used to inflate and deflate the air bag (3); A push plate (4), the push plate (4) being slidably disposed between the inner wall of the shaft body (1) and the inflatable bag (3), and being used to push the key block (5) to move by being driven by the expansion of the inflatable bag (3); A thrust piece is arranged between the push plate (4) and the inner wall of the shaft body (1) and is used to apply a force to the push plate (4) in a direction toward the inflatable bag (3).
2. The key-type air shaft according to claim 1, characterized in that: The thrust piece is an elastic piece (9), and the elastic pieces (9) are provided at both ends of the thrust plate (4).
3. A key-type air shaft according to claim 2, characterized in that: A groove (8) is provided on the inner wall of the shaft body (1); one end of the elastic member (9) is fixed in the groove (8), and the other end is fixed on the push plate (4).
4. The key-type air shaft according to claim 2, characterized in that: The push plate (4) is provided with a groove (8); one end of the elastic member (9) is fixed in the groove (8), and the other end is fixed on the inner wall of the shaft body (1).
5. The key-type air shaft according to claim 2, characterized in that: A driving rod (7) is fixedly arranged on the inner wall surface of the shaft body (1); the elastic member (9) is a spring, and the driving rod (7) passes through the elastic member (9); a guide hole (42) is arranged on the push plate (4); one end of the driving rod (7) is fixed on the inner wall of the shaft body (1), and the other end passes through the guide hole (42).
6. The key-type air shaft according to claim 5, characterized in that: The driving rod (7) is provided with an enlarged head (71) at one end of the driving rod (7) passing through the guide hole (42), and the surface of the enlarged head (71) facing the push plate (4) can abut against the push plate (4).
7. The key-type air shaft according to claim 1, characterized in that: The key blocks (5) are arranged in three rows in the circumferential direction of the shaft body (1), and the push plates (4) and thrust members are also arranged in three rows. The push plates (4) are used to simultaneously push the key blocks (5) in the same row to move.
8. The key-type air shaft according to claim 1, characterized in that: The intersection of the edge lines of the push plate (4) is arranged as a rounded corner (41).
9. The key-type air shaft according to claim 6, characterized in that: The enlarged head (71) is threadedly connected to the driving rod (7).
10. The key-type air shaft according to claim 1, characterized in that: The air inlet shaft (2) is provided with an inflation hole (21), and the inflation bag (3) is provided with an inflation head (31). The inflation head (31) and the inflation hole (21) are detachably connected, so that the air inlet shaft (2) can be communicated with the inflation bag (3).