Adjustable double-stroke air cylinder
By designing an adjustable dual-stroke cylinder, the combination of stroke adjusting parts and adjustment parts is used to achieve adjustable cylinder stroke, solving the problems of large space occupation and high cost in the existing cylinder system, and improving production efficiency and profits.
Patent Information
- Application Number
- CN202421292026.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-06
AI Technical Summary
During the tape production process, the existing cylinder system needs to be configured differently according to different lengths and locations, resulting in large space occupation and high production costs.
An adjustable dual-stroke cylinder is designed, and the extension and retraction positions of the rear piston rod are adjusted by combining the stroke adjuster, retracting and protruding adjustment members, thereby adjusting the stroke range of the front piston rod.
Through the adjustable stroke design, production costs are reduced, production profits are increased, and flexible adaptation to reels of different lengths and positions is achieved.
Smart Images
Figure CN222479115U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of cylinders, and in particular to an adjustable double-stroke cylinder. Background Art
[0002] During the tape production process, a fully automatic paper tube laying machine is used, and a cylinder is used to push the pulling device to pass the reel into the paper tube. During the production process, the positioning of the paper tubes on the same reel is different, and the reel has different lengths. It is often necessary to configure cylinders with different strokes at different positions, which takes up space and increases production costs.
[0003] In the existing production, the pipe threading action of the pipe laying machine is realized by a servo mechanism, but there are problems of high purchase cost and low profit. Utility Model Content
[0004] The purpose of the present application is to provide an adjustable two-stroke cylinder, which can reduce production costs and increase production profits by adjusting the stroke.
[0005] The technical solution of the present application provides an adjustable double-stroke cylinder, comprising: a front cylinder body and a rear cylinder body, the front cylinder body and the rear cylinder body being connected to each other through an intermediate end cover, the intermediate end cover being provided with an air hole; a stroke adjusting member, the stroke adjusting member being located in the front cylinder body; a front piston rod, the front piston rod sliding in the front cylinder body, a front piston being provided on the outer side of the front piston rod, the front piston rod moving in a direction close to the intermediate end cover until the front piston abuts against the stroke adjusting member and being limited; a rear piston rod, the rear piston rod being slidably arranged in the rear cylinder body, one end of the rear piston rod passing through the intermediate end cover The intermediate end cover is fixedly connected to the stroke adjustment member, and a rear piston is provided on the outer side of the rear piston rod; a rear end cover and a stroke adjustment plate, the rear end cover is located at the end of the rear cylinder body facing away from the front cylinder body, a spacing is left between the stroke adjustment plate and the rear end cover, the rear piston rod passes through the rear end cover and the stroke adjustment plate, a retraction adjustment member is provided on the portion of the rear piston rod located between the rear end cover and the stroke adjustment plate, and an extension adjustment member is installed on the portion of the rear piston rod located outside the stroke adjustment plate, and both the retraction adjustment member and the extension adjustment member are movable along the axial direction of the rear piston rod.
[0006] Optionally, the stroke adjusting member is provided with a connected throttle hole and a buffer air chamber, a buffer sealing ring is embedded on the inner wall of the buffer air chamber, and the buffer air chamber is connected to the air hole; a buffer ring is also provided on the outer side of the front piston rod, and when it moves toward the direction close to the middle end cover until the outer side of the buffer ring is in sealing contact with the buffer sealing ring, a closed regulating air chamber is defined between the front piston and the stroke adjusting member, and the regulating air chamber is connected to the throttle hole through the gap between the inner wall of the front cylinder body and the stroke adjusting member.
[0007] Optionally, an air path is provided on the rear piston rod, and the air path is connected between the air hole and the buffer air chamber.
[0008] Optionally, the stroke adjustment plate includes a baffle and a connecting plate; the baffle is arranged opposite to the rear end cover, and the connecting plate is connected between the baffle and the rear end cover.
[0009] Optionally, the rear piston rod includes a first rear piston rod and a second rear piston rod arranged axially, the rear piston is mounted on the first rear piston rod, the first rear piston rod is connected to the stroke adjusting member, and the second rear piston rod passes through the rear end cover and the baffle in sequence.
[0010] Optionally, the second rear piston rod includes a threaded section with an external thread, threaded holes are provided on the retracting adjustment member and the extending adjustment member, and the retracting adjustment member and the extending adjustment member are threadedly connected to the threaded section.
[0011] Optionally, a front end cover is provided on one end of the front cylinder body facing away from the rear cylinder body, and a first air hole is opened on the front end cover; a second air hole is opened on the middle end cover, and a third air hole is opened on the rear end cover.
[0012] Optionally, the inner diameter of the front cylinder body is D1, the inner diameter of the rear cylinder body is D2, and D2>D1.
[0013] Optionally, the adjustable two-stroke cylinder also includes a limit piece installed on the front piston rod, and the buffer ring includes a first limit surface and a second limit surface relatively arranged along the axial direction of the front piston rod, the first limit surface abuts against the front piston, and the second limit surface abuts against the limit piece.
[0014] Optionally, the outer diameter of one end of the buffer ring facing the middle end cover gradually decreases towards the direction approaching the middle end cover.
[0015] The above technical solution has the following beneficial effects:
[0016] The adjustable double-stroke cylinder provided by the present application limits the initial positions of the rear piston, rear piston rod, stroke adjusting member, front piston and front piston rod when the retracting adjusting member abuts against the stroke adjusting plate. When the extending adjusting member abuts against the stroke adjusting plate, the rear piston rod is extended to the maximum stroke. By adjusting the positions of the retracting adjusting member and the extending adjusting member along the axial direction of the rear piston rod, the extension and retracting positions of the rear piston rod can be adjusted, and then the stroke range of the front piston rod can be adjusted, thereby reducing production costs and increasing production profits. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of an adjustable double-stroke cylinder in one embodiment of the present application.
[0018] Figure 2 Schematic diagram of the structure of a stroke adjustment member in one embodiment of the present application.
[0019] Figure 3 for Figure 1 Cross-sectional view of EE.
[0020] Figure 4 It is a right side view of an adjustable dual-stroke cylinder in one embodiment of the present application.
[0021] Reference Numbers
[0022] 1-front cylinder body, 10-front piston, 11-front piston rod, 110-air path, 12-buffer ring, 13-stroke adjustment member, 130-throttle hole, 131-buffer air chamber, 132-buffer sealing ring, 14-adjusting air chamber, 15-limiting member.
[0023] 2-rear cylinder body, 20-rear piston, 21-rear piston rod, 210-first rear piston rod, 211-second rear piston rod, 212-rear threaded section, 22-retracting adjustment member, 23-extending adjustment member.
[0024] 3-middle end cover, 30-air hole, 31-second air hole.
[0025] 4-stroke adjustment plate, 40-baffle plate, 41-connecting plate.
[0026] 5-front end cover, 50-first air hole.
[0027] 6-rear end cover, 60-third air hole. DETAILED DESCRIPTION
[0028] The specific implementation of the present utility model will be further described below in conjunction with the accompanying drawings.
[0029] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a variety of structural modes and implementation modes can be replaced by those skilled in the art. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction on the technical solution of the utility model.
[0030] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.
[0031] The present application provides an adjustable double-stroke cylinder, comprising: a front cylinder body 1 and a rear cylinder body 2. The front cylinder body 1 and the rear cylinder body 2 are connected to each other through an intermediate end cover 3, and an air hole 30 is opened on the intermediate end cover 3.
[0032] like Figure 1 As shown, a stroke adjusting member 13 is provided in the front cylinder body 1. The front piston rod 11 slides in the front cylinder body 1, and a front piston 10 is provided on the outer side of the front piston rod 11. The front piston rod 11 moves toward the direction close to the middle end cover 3 until the piston abuts against the stroke adjusting member 13 and is limited; the rear piston rod 21 slides in the rear cylinder body 2, and one end of the rear piston rod 21 passes through the middle end cover 3 and is fixedly connected to the stroke adjusting member 13, and a rear piston 20 is provided on the outer side of the rear piston rod 21. Figure 3 As shown, the cross section of the front piston rod 11 is similar to a regular hexagon, and the anti-rotation front piston 10 is installed at the rear end of the front piston rod 11.
[0033] The rear end cover 6 is located at the end of the rear cylinder body 2 facing away from the front cylinder body 1, and a distance is left between the stroke adjustment plate 4 and the rear end cover 6. The rear piston rod 21 passes through the rear end cover 6 and the stroke adjustment plate 4. A retraction adjustment member 22 is provided on the portion of the rear piston rod 21 located between the rear end cover 6 and the stroke adjustment plate 4, and an extension adjustment member 23 is installed on the portion of the rear piston rod 21 located outside the stroke adjustment plate 4. Both the retraction adjustment member 22 and the extension adjustment member 23 are movable along the axial direction of the rear piston rod 21.
[0034] When the retracting adjusting member 22 abuts against the stroke adjusting plate 4, the initial positions of the rear piston 20, the rear piston rod 21, the stroke adjusting member 13, the front piston 10 and the front piston rod 11 are limited. When the extending adjusting member 23 abuts against the stroke adjusting plate 4, the rear piston rod 21 is extended to the maximum stroke. By adjusting the axial positions of the retracting adjusting member 22 and the extending adjusting member 23 on the rear piston rod 21, the extension and retracting positions of the rear piston rod 21 can be adjusted, and then the stroke range of the front piston rod 11 can be adjusted, thereby reducing production costs and increasing production profits.
[0035] As an optional embodiment, the stroke adjustment member 13 is provided with a throttle hole 130 and a buffer air chamber 131 that are connected. A buffer sealing ring 132 is embedded on the inner wall of the buffer air chamber 131. The buffer air chamber 131 is connected to the air hole 30. The outer side of the front piston rod 11 is also provided with a buffer ring 12. When the outer side of the buffer ring 12 moves toward the direction close to the middle end cover 3 and is sealed against the buffer sealing ring 132, a closed regulating air chamber 14 is defined between the front piston 10 and the stroke adjustment member 13. The regulating air chamber 14 is connected to the throttle hole 130 through the gap between the inner wall of the front cylinder body 1 and the stroke adjustment member 13. Figure 1 to Figure 2 As shown, the throttling hole 130 can be a small hole with an inner diameter between 0.5 mm and 2 mm, or a hole with a diameter greater than 4 mm and a flow limiting element arranged in the hole to achieve a throttling effect. Figure 1 As shown, a piston seal ring is provided on the outer side of the front piston 10 to seal between the front piston 10 and the wall of the front cylinder 1. A seal ring is provided on the outer side of the stroke adjusting member 13, and the seal ring is located between the throttle hole 130 and the middle end cover 3 to prevent gas from escaping from between the stroke adjusting member 13 and the wall of the front cylinder 1. When the front piston rod 11 runs to the end of the stroke, the buffer ring 12 moves to fit with the buffer seal ring 132, and the end of the front piston rod 11 is sealed at the opening of the buffer air chamber 131. The gas in the regulating air chamber 14 defined by the front piston 10 and the stroke adjusting member 13 can only enter the throttle hole 130 through the gap between the wall of the front cylinder 1 and the stroke adjusting member 13, and enter the buffer air chamber 131 through the throttle hole 130, and then be discharged to the outside through the air hole 30 on the middle end cover 3. During this process, due to the throttling effect of the throttle hole 130, the gas in the regulated air cannot be discharged quickly, and a certain air pressure will be generated, thereby slowing down the movement of the front piston rod 11, thereby achieving a buffering effect, effectively reducing the end speed of the front piston rod 11, reducing the impact force of the front piston rod 11, reducing noise, and extending the service life of the cylinder.
[0036] As an optional embodiment, the rear piston rod 21 is provided with an air path 110, and the air path 110 is connected between the air hole 30 and the buffer air chamber 131. Figure 2 As shown, the path of the gas path 110 is L-shaped, a sunken circular hole is opened on the end surface of the middle end cover 3, and an air outlet hole is opened on the side of the middle end cover 3, and the circular hole and the air outlet hole are connected to form a path of the air hole 30. The two ends of the gas path 110 are respectively connected to the buffer air chamber 131 and the air hole 30 to achieve the communication between the buffer air chamber 131 and the air hole 30.
[0037] As an optional embodiment, the stroke adjustment plate 4 includes a baffle 40 and a connecting plate 41; the baffle 40 is arranged opposite to the rear end cover 6, and the connecting plate 41 is connected between the baffle 40 and the rear end cover 6. Figure 1 As shown, the connecting plate 41 is supported between the baffle 40 and the rear end cover 6 to maintain a preset distance between the baffle 40 and the rear end cover 6. The end of the connecting plate 41 is provided with a mounting plate that fits the rear end cover 6, and the mounting plate is bolted to the rear end cover 6, as shown in FIG. Figure 4 As shown, it is stable, reliable and easy to disassemble.
[0038] As an optional embodiment, the rear piston rod 21 includes a first rear piston rod 210 and a second rear piston rod 211 arranged in an axial direction, the rear piston 20 is mounted on the first rear piston rod 210, the first rear piston rod 210 is connected to the stroke adjustment member 13, and the second rear piston rod 211 passes through the rear end cover 6 and the baffle 40 in sequence. Figure 1 As shown, the axial motion range of the second rear piston rod 211 is adjusted by the retraction adjustment member 22 and the extension adjustment member 23 respectively located in front and behind the baffle 40, so as to adjust the extension and retraction stroke range of the rear piston 20, the longest length of the adjustment section is ΔL, the longest stroke of the rear piston 20 is L2, the longest stroke of the front piston 10 is L1, L1>L2. The length of the second rear piston rod 211 extending out of the rear end cover 6 at the initial position is L3, L3≥L2.
[0039] As an optional embodiment, the rear piston rod 21 includes a threaded section 212 with external threads, and threaded holes are provided on the retracting adjustment member 22 and the extending adjustment member 23, and the retracting adjustment member 22 and the extending adjustment member 23 are both threadedly connected to the threaded section 212. Figure 1 The retraction adjustment member 22 and the extension adjustment member 23 can both be nut structures, and the axial position on the rear piston rod 21 can be adjusted by rotating on the threaded section 212.
[0040] As an optional embodiment, a front end cover 5 is provided on the end of the front cylinder body 1 facing away from the rear cylinder body 2, and a first air hole 50 is provided on the front end cover 5; a second air hole 31 is provided on the middle end cover 3, and a third air hole 60 is provided on the rear end cover 6. The front section of the front piston rod 11 passes through the front end cover 5. When in use, when the air hole 30 and the third air hole 60 are ventilated, the front piston rod 11 and the rear piston rod 21 are pushed forward; when the first air hole 50 is ventilated, the front piston rod 11 and the rear piston rod 21 are both retracted backward. The second air hole 31 can be connected to a muffler.
[0041] As an optional embodiment, the inner diameter of the front cylinder body 1 is D1, and the inner diameter of the rear cylinder body 2 is D2, where D2>D1. When the front piston rod 11 is retracted, the third air hole 60 continues to be ventilated. Since the air pressure area of the rear cylinder body 2 is large and the air pressure is large, the front piston rod 11 can only be retracted to the position of the stroke adjustment member 13 until the third air hole 60 is de-aired, and the front piston rod 11 can be fully retracted to the initial position.
[0042] As an optional embodiment, the adjustable two-stroke cylinder further includes a stopper 15 mounted on the front piston rod 11, and the buffer ring 12 includes a first stopper surface and a second stopper surface that are relatively arranged along the axial direction of the front piston rod 11, the first stopper surface abuts against the front piston 10, and the second stopper surface abuts against the stopper 15. The stopper 15 in the embodiment of the present application plays a role of axially limiting the buffer ring 12, ensuring the structural stability of the buffer ring 12 on the front piston rod 11.
[0043] As an optional embodiment, the outer diameter of the end of the buffer ring 12 facing the middle end cover 3 gradually decreases toward the middle end cover 3. Figure 1 and Figure 2 As shown, the outer diameter of the buffer ring 12 on one end facing the middle end cover 3 gradually decreases, which is beneficial for the end of the buffer ring 12 to smoothly pass through the buffer sealing ring 132 and prevent the buffer sealing ring 132 from being scratched.
[0044] As needed, the above technical solutions can be combined to achieve the best technical effect.
[0045] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.
Claims
1. An adjustable double-stroke cylinder, characterized in that: include: A front cylinder body and a rear cylinder body, wherein the front cylinder body and the rear cylinder body are connected to each other through an intermediate end cover, and an air hole is opened on the intermediate end cover; A stroke adjusting member, wherein the stroke adjusting member is located in the front cylinder body; A front piston rod, the front piston rod slides in the front cylinder body, a front piston is provided on the outer side of the front piston rod, and the front piston rod moves toward the middle end cover until the front piston abuts against the stroke adjusting member and is limited; A rear piston rod, the rear piston rod is slidably arranged in the rear cylinder body, one end of the rear piston rod is fixedly connected to the stroke adjusting member after passing through the middle end cover, and a rear piston is arranged on the outer side of the rear piston rod; A rear end cover and a stroke adjustment plate, the rear end cover is located at an end of the rear cylinder body facing away from the front cylinder body, a distance is left between the stroke adjustment plate and the rear end cover, the rear piston rod passes through the rear end cover and the stroke adjustment plate, a retraction adjustment piece is provided on the portion of the rear piston rod located between the rear end cover and the stroke adjustment plate, an extension adjustment piece is installed on the portion of the rear piston rod located outside the stroke adjustment plate, and both the retraction adjustment piece and the extension adjustment piece are movable along the axial direction of the rear piston rod.
2. The adjustable two-stroke cylinder according to claim 1, characterized in that: The stroke adjustment member is provided with a throttle hole and a buffer air chamber which are connected to each other, a buffer sealing ring is embedded on the inner wall of the buffer air chamber, and the buffer air chamber is connected to the air hole; A buffer ring is also provided on the outer side of the front piston rod. When the outer side of the buffer ring moves toward the middle end cover and seals against the buffer sealing ring, a closed regulating air chamber is defined between the front piston and the stroke adjusting member. The regulating air chamber is connected to the throttle hole through the gap between the inner wall of the front cylinder body and the stroke adjusting member.
3. The adjustable two-stroke cylinder according to claim 2, characterized in that: An air path is provided on the rear piston rod, and the air path is connected between the air hole and the buffer air chamber.
4. The adjustable two-stroke cylinder according to claim 1, characterized in that: The stroke adjustment plate includes a baffle and a connecting plate; The baffle plate is arranged opposite to the rear end cover, and the connecting plate is connected between the baffle plate and the rear end cover.
5. The adjustable two-stroke cylinder according to claim 4, characterized in that: The rear piston rod comprises a first rear piston rod and a second rear piston rod arranged axially, the rear piston is mounted on the first rear piston rod, the first rear piston rod is connected to the stroke adjusting member, and the second rear piston rod passes through the rear end cover and the baffle in sequence.
6. The adjustable two-stroke cylinder according to claim 5, characterized in that: The second rear piston rod comprises a threaded section with external threads, threaded holes are provided on the retracting adjustment member and the extending adjustment member, and the retracting adjustment member and the extending adjustment member are both threadedly connected to the threaded section.
7. The adjustable two-stroke cylinder according to claim 6, characterized in that: A front end cover is provided on one end of the front cylinder body facing away from the rear cylinder body, and a first air hole is opened on the front end cover; The middle end cover is provided with a second air hole, and the rear end cover is provided with a third air hole.
8. The adjustable two-stroke cylinder according to any one of claims 1 to 7, characterized in that: The inner diameter of the front cylinder body is D1, and the inner diameter of the rear cylinder body is D2, where D2>D1.
9. The adjustable two-stroke cylinder according to claim 2, characterized in that: The adjustable two-stroke cylinder also includes a limit piece installed on the front piston rod, and the buffer ring includes a first limit surface and a second limit surface arranged opposite to each other along the axial direction of the front piston rod, the first limit surface abuts against the front piston, and the second limit surface abuts against the limit piece.
10. The adjustable two-stroke cylinder according to claim 9, characterized in that: The outer diameter of one end of the buffer ring facing the middle end cover gradually decreases toward the direction approaching the middle end cover.