A rotary air cylinder with a tail end water injection function
By incorporating a tail-end water injection mechanism and sealing components within the rotary cylinder, the problems of high complexity and low cooling efficiency in traditional cooling systems are solved, achieving efficient cooling and dust prevention, and extending equipment lifespan.
Patent Information
- Application Number
- CN202522127782.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
The external cooling system of traditional rotary cylinders increases the complexity and size of the equipment, has low cooling efficiency, and cannot cool the workpiece in a timely and effective manner.
Design a rotary cylinder with tail-end water injection function. By setting a water injection mechanism in the cylinder body, water is injected from the tail end into the workpiece for cooling by the reciprocating motion of the piston. Water leakage and dust ingress are reduced by sealing components and dustproof mechanisms.
It achieves efficient cooling of workpieces without increasing equipment complexity, reduces the possibility of dust entering the cylinder, and extends the service life of the equipment.
Smart Images
Figure CN224679816U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cylinders, and in particular to a rotary cylinder with a tail-end water injection function. Background Technology
[0002] Rotary cylinders are pneumatic actuators widely used in industrial automation and machining. They drive pistons to rotate or reciprocate by compressed air, thereby completing various mechanical operations. Due to their compact structure, rapid action, and convenient control, rotary cylinders are widely used in machine tool fixtures, automated production lines, robots, and other fields.
[0003] Traditional rotary cylinders drive pistons to reciprocate through compressed air, which is then converted into rotary output via gear rack or vane mechanisms. In recent years, with the increasing demand for high-temperature and high-pollution operating conditions, higher requirements have been placed on the weather resistance and lifespan of cylinders. The industry generally adopts external spray cooling or high-temperature resistant sealing materials to cope with these requirements.
[0004] External cooling systems not only increase the complexity and size of the equipment, but may also lead to low cooling efficiency and failure to cool the workpieces in a timely and effective manner. Utility Model Content
[0005] The purpose of this application is to address the problem that external cooling systems, as mentioned in the background art, not only increase the complexity and size of the equipment but may also lead to low cooling efficiency and failure to cool the workpiece in a timely and effective manner. This application provides a rotary cylinder with a tail-end water injection function.
[0006] To achieve the above objectives, this application specifically adopts the following technical solution: A rotary cylinder with a tail-end water injection function includes a cylinder body, a cylinder cover fixed on the cylinder body, a piston slidably connected inside the cylinder body, one end of the piston penetrating the cylinder body and slidably connected to the cylinder body, a valve core fixed on the cylinder cover, one end of the valve core penetrating the cylinder cover and slidably connected to the piston, a valve body rotatably connected to the valve core, a valve cover fixed on the valve body, a water injection mechanism provided on the valve core, and an auxiliary dust prevention mechanism provided between the cylinder body and the piston.
[0007] By adopting the above technical solution, the water supply pipe is connected to the water injection structure. When the piston on the cylinder moves back and forth, the external water supply pipe supplies water to the water injection mechanism, and the water flows out from the end of the piston that passes through the cylinder. This facilitates the cooling of the workpiece and reduces the possibility of needing to set up an external cooling system, which would greatly increase the complexity of the equipment.
[0008] Furthermore, the water injection mechanism includes a skeleton oil seal disposed between the valve cover and the valve core, a water injection hole is provided on the valve core and the water injection hole penetrates the valve core, a water outlet hole is provided in the middle of the piston and the water outlet hole penetrates the piston, the water injection hole corresponds to the water outlet hole on the piston, a water inlet hole is provided at the end of the valve cover away from the valve body, the water injection hole corresponds to the water inlet hole on the valve cover, a sealing component one is provided between the valve core and the valve cover, and a sealing component two is provided between the valve core and the piston.
[0009] By adopting the above technical solution, the water inlet is connected to the external water supply pipe. Water then passes through the sealing component, enters the water injection hole, flows from the water injection hole to the water outlet hole, and finally flows out from the piston's water outlet hole. This facilitates the cooling of the processed parts and reduces the possibility of needing to set up an external cooling system, which would significantly increase the complexity of the equipment.
[0010] Furthermore, the sealing assembly includes a sealing element disposed between the valve core and the valve cover. The sealing element has a through hole, which corresponds to the water injection hole on the valve core and the water inlet hole on the valve cover. A sealing spring is disposed between the sealing element and the valve cover. The sealing element has a limiting groove, and the sealing spring is located in the limiting groove. Both ends of the sealing spring abut against the sealing element and the valve cover. An auxiliary sealing ring is fixed between the sealing element and the valve cover.
[0011] By adopting the above technical solution, the sealing element is pressed against the valve core, and the sealing spring is used to support the sealing element, thereby reducing the possibility of water flowing through the gap between the sealing element and the valve core when water passes through the sealing element.
[0012] Furthermore, the second sealing assembly includes an O-ring fixed to the inner wall of the piston outlet hole, a star-shaped sealing ring fixed to the inner wall of the piston outlet hole, and the valve core extending into the piston outlet hole at one end near the piston, with the valve core abutting against the O-ring and the star-shaped sealing ring.
[0013] By adopting the above technical solution, when the piston moves, the water outlet in the middle of the piston moves on the valve core, and the O-ring and star-shaped sealing ring seal the gap between the piston and the valve core, thereby reducing the possibility of water entering the cylinder.
[0014] Furthermore, the inner walls of the water injection hole and the water outlet hole are coated with a protective layer, which is a polytetrafluoroethylene coating.
[0015] By adopting the above technical solution, the inner walls of both the water inlet and outlet holes are coated with polytetrafluoroethylene, which can effectively prevent corrosion of metal parts when water flows through them.
[0016] Furthermore, the auxiliary dustproof mechanism includes a dustproof ring one fixed on the cylinder body, a dustproof ring two fixed at one end of the piston extending out of the cylinder body, and a dustproof cover provided between the dustproof ring one and the dustproof ring two.
[0017] By adopting the above technical solution, the dust cover between the first dust ring and the second dust ring blocks the gap between the piston extension end and the cylinder, thereby further reducing the amount of dust entering between the piston and the cylinder and reducing the wear between the piston and the cylinder.
[0018] Furthermore, a connecting ring is fixed to one end of the dust cover near the first dust cover ring, and a snap-fit groove corresponding to the first connecting ring is provided on the first dust cover ring. A connecting ring is fixed to one end of the dust cover near the second dust cover ring, and a snap-fit groove corresponding to the second connecting ring is provided on the second dust cover ring. Both the first connecting ring and the second connecting ring are rubber rings.
[0019] By adopting the above technical solution, the dust cover is supported by connecting ring one and connecting ring two, and the rubber connecting ring one and connecting ring two are elastically engaged with dust ring one and dust ring two, which makes it easy to replace the dust cover.
[0020] Furthermore, the dust cover is foldable and is a rubber cover.
[0021] By adopting the above technical solution, the piston drives the connecting ring one, and the dust cover, pulled by the connecting ring one and the dust cover one, allows the dust cover to unfold and fold along with the piston, so that the dust cover can move with the piston when the piston moves.
[0022] In summary, this application includes at least one of the following beneficial effects; 1. This application achieves the goal of conveniently cooling the processed parts by having the water outlet hole in the middle of the piston on the cylinder block fitted onto one end of the valve core, so that the water outlet hole on the piston corresponds to the water inlet hole of the valve core. The gap between the valve cover and the valve core is sealed by the skeleton oil seal, and the water inlet hole on the valve cover is connected to the external water supply pipe. When water is supplied, the water flows in from the water inlet hole of the valve cover, then passes through the seal and enters the water inlet hole of the valve core. The water flows along the water inlet hole into the water outlet hole in the middle of the piston, and then flows out from the water outlet hole of the piston. This achieves the goal of conveniently cooling the processed parts and reducing the possibility of needing to set up an external cooling system, which may greatly increase the complexity of the equipment.
[0023] 2. In this application, when the piston moves back and forth in the cylinder, the end of the piston extending out of the cylinder moves back and forth on the cylinder. At the same time, the piston drives the second dustproof ring, the second dustproof ring drives the second connecting ring, and the second connecting ring drives the dust cover. Under the pull of the first connecting ring and the first dustproof ring, the dust cover moves with the piston to unfold and fold, thereby further reducing the amount of dust entering between the piston and the cylinder and reducing the wear between the piston and the cylinder. Attached Figure Description
[0024] Figure 1 This is a first three-dimensional structural schematic diagram of the rotary cylinder in this application; Figure 2 This is a schematic diagram of the internal structure of the rotary cylinder in this application; Figure 3 This application Figure 2 Enlarged view of point A in the middle; Figure 4 This application Figure 2 Enlarged view of point B in the middle; Figure 5 This application Figure 2 Enlarged diagram of point C in the middle.
[0025] Explanation of reference numerals in the attached figures: 1. Cylinder block; 2. Piston; 3. Cylinder head; 4. Valve core; 5. Valve body; 6. Water injection mechanism; 61. Skeleton oil seal; 62. Water injection hole; 63. Sealing assembly one; 631. Seal; 632. Sealing spring; 633. Auxiliary sealing ring; 64. Sealing assembly two; 641. O-ring seal; 642. Star seal; 7. Auxiliary dustproof mechanism; 71. Dustproof ring one; 72. Dustproof ring two; 73. Dust cover; 74. Connecting ring one; 75. Connecting ring two; 8. Valve cover. Detailed Implementation
[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0027] This application discloses a rotary cylinder with a tail-end water injection function.
[0028] Reference Figure 1 , Figure 2 and Figure 3 A rotary cylinder with tail-end water injection function includes a cylinder body 1, a cylinder cover 3 fixed on the cylinder body 1, a piston 2 slidably connected inside the cylinder body 1, one end of the piston 2 penetrating the cylinder body 1 and slidably connected to the cylinder body 1, a valve core 4 fixed on the cylinder cover 3, one end of the valve core 4 penetrating the cylinder cover 3 and slidably connected to the piston 2, a valve body 5 rotatably connected to the valve core 4, a valve cover 8 fixed on the valve body 5, a water injection mechanism 6 provided on the valve core 4, and an auxiliary dustproof mechanism 7 provided between the cylinder body 1 and the piston 2.
[0029] When using this rotary cylinder, install it on the clamping device of the corresponding equipment, and then connect an external water supply pipe to the valve cover 8, connecting the water supply pipe to the water injection mechanism. When the piston 2 on the cylinder body 1 reciprocates, the external water supply pipe supplies water to the water injection mechanism 6, allowing the water to flow out from the end of the piston 2 that passes through the cylinder body 1, so that the flowing water comes into contact with the workpiece and can cool the workpiece. At the same time, the water from the water injection mechanism 6 flows through the piston 2, which can cool the piston 2. As the piston 2 moves in the cylinder body 1, the auxiliary dustproof mechanism 7 on the end of the piston 2 that passes through the cylinder body 1 prevents dust from entering the cylinder body 1 from the gap between the cylinder body 1 and the piston 2, further reducing the amount of dust entering the cylinder body 1 from the gap between the piston 2 and the cylinder body 1. By setting the water injection mechanism 6 on the valve core 4, the water injection mechanism 6 supplies water from the position of the valve cover 8, then passes through the valve core 4, and finally flows out from the end of the piston 2, thus facilitating the cooling of the processed parts and reducing the possibility of needing to set up an external cooling system, which would greatly increase the complexity of the equipment.
[0030] Reference Figure 2 , Figure 3 and Figure 4 The water injection mechanism 6 includes a skeleton oil seal 61 disposed between the valve cover 8 and the valve core 4. The valve core 4 has a water injection hole 62 that penetrates the valve core 4. The piston 2 has a water outlet hole in the middle that penetrates the piston 2. The water injection hole 62 corresponds to the water outlet hole on the piston 2. The valve cover 8 has a water inlet hole at the end away from the valve body 5. The water injection hole 62 corresponds to the water inlet hole on the valve cover 8. A sealing component 1 63 is disposed between the valve core 4 and the valve cover 8. A sealing component 2 64 is disposed between the valve core 4 and the piston 2.
[0031] In addition, the sealing assembly 63 includes a sealing element 631 disposed between the valve core 4 and the valve cover 8. The sealing element 631 has a through hole, which corresponds to the water injection hole 62 on the valve core 4 and the water inlet hole on the valve cover 8. A sealing spring 632 is disposed between the sealing element 631 and the valve cover 8. The sealing element 631 has a limit groove, and the sealing spring 632 is located in the limit groove. Both ends of the sealing spring 632 abut against the sealing element 631 and the valve cover 8. An auxiliary sealing ring 633 is fixed between the sealing element 631 and the valve cover 8.
[0032] Furthermore, the sealing assembly 64 includes an O-ring 641 fixed to the inner wall of the outlet hole of the piston 2, a star-shaped sealing ring 642 fixed to the inner wall of the outlet hole of the piston 2, and the end of the valve core 4 near the piston 2 extending into the outlet hole of the piston 2, with the valve core 4 abutting against the O-ring 641 and the star-shaped sealing ring 642.
[0033] Furthermore, the inner walls of the water injection hole 62 and the water outlet hole are coated with a protective layer, which is a polytetrafluoroethylene coating.
[0034] After assembling the rotary cylinder, the water outlet hole in the middle of the piston 2 on the cylinder body 1 is fitted onto one end of the valve core 4, so that the water outlet hole on the piston 2 corresponds to the water inlet hole 62 of the valve core 4. The gap between the valve cover 8 and the valve core 4 is sealed by the skeleton oil seal 61, and the water inlet hole on the valve cover 8 is connected to the external water supply pipe. When water is supplied, the water flows in from the water inlet hole of the valve cover 8, then passes through the seal 631, and enters the water inlet hole 62 of the valve core 4. The sealing spring 632 on the seal 631 supports the seal 631, so that the seal 631 is firmly against the valve core 4. When the water flows through the seal 631, the possibility of water passing between the seal 631 and the valve body 5 is reduced. With the action of the auxiliary sealing ring 633, the possibility of water passing between the seal 631 and the valve cover is reduced. The possibility of water passing between 8 improves the effect of the seal 631. Water flows along the water inlet 62 into the water outlet in the middle of the piston 2, and then flows out from the water outlet of the piston 2. While the piston 2 moves back and forth, the water outlet on the piston 2 moves back and forth on the valve body 5. The O-ring seal 641 and star seal 642 on the inner wall of the water outlet abut against the valve core 4, sealing the valve core 4 and the piston 2, reducing the possibility of water entering the cylinder 1 from between the valve core 4 and the piston 2. By connecting the water inlet on the valve cover 8 to the external water supply pipe, water flows through the seal 631 into the water inlet 62 of the valve core 4, and sprays out from the water outlet of the piston 2 along the water inlet 62. This facilitates the cooling of the processed parts and reduces the possibility of needing to set up an external cooling system, which would greatly increase the complexity of the equipment.
[0035] Reference Figure 1 , Figure 2 and Figure 5 The auxiliary dustproof mechanism 7 includes a dustproof ring 71 fixed on the cylinder 1, a dustproof ring 72 fixed at one end of the piston 2 extending out of the cylinder 1, and a dustproof cover 73 provided between the dustproof ring 71 and the dustproof ring 72.
[0036] In addition, a connecting ring 74 is fixed to one end of the dust cover 73 near the dust ring 71. The dust ring 71 has a snap-fit groove corresponding to the connecting ring 74. A connecting ring 75 is fixed to one end of the dust cover 73 near the dust ring 72. The dust ring 72 has a snap-fit groove corresponding to the connecting ring 75. Both the connecting ring 74 and the connecting ring 75 are rubber rings.
[0037] Furthermore, the dust cover 73 is folded and is a rubber cover.
[0038] When piston 2 moves back and forth in cylinder 1, the end of piston 2 extending out of cylinder 1 moves back and forth on cylinder 1. Simultaneously, piston 2 drives dust ring 72, which in turn drives connecting ring 75. Connecting ring 75 drives dust cover 73. Dust cover 73, pulled by connecting ring 74 and dust ring 71, unfolds and folds with piston 2. When dust cover 73 wears out after prolonged use, simply drag connecting ring 74 and connecting ring 75 forcefully. Remove the second connecting ring 75 from its corresponding slot, replace it with a new dust cover 73, connecting ring 1 74, and connecting ring 2 75, and then insert connecting ring 1 74 and connecting ring 2 75 into their corresponding slots to complete the replacement of the dust cover 73. By fitting the dust cover 73 between the cylinder body 1 and the extended end of the piston 2, the dust cover 73 blocks the gap between the cylinder body 1 and the extended end of the piston 2, thereby further reducing the amount of dust entering between the piston 2 and the cylinder body 1 and reducing the wear between the piston 2 and the cylinder body 1.
[0039] Working principle: When using this rotary cylinder, install it on the clamping device of the corresponding equipment, connecting the water inlet hole on the valve cover 8 to the external water supply pipe. During water supply, water flows in through the water inlet hole of the valve cover 8, passes through the seal 631, and enters the water injection hole 62 of the valve core 4. The water flows along the water injection hole 62 into the water outlet hole in the middle of the piston 2, and then flows out from the water outlet hole of the piston 2. While the piston 2 moves back and forth, the water outlet hole on the piston 2 moves back and forth on the valve body 5. The O-ring on the inner wall of the water outlet hole... Sealing ring 641 and star-shaped sealing ring 642 abut against valve core 4 to seal valve core 4 and piston 2. Then water directly contacts the workpiece from the water outlet in the middle of piston 2. While piston 2 moves back and forth, piston 2 drives dustproof ring 72, dustproof ring 72 drives connecting ring 75, connecting ring 75 drives dust cover 73. Under the pull of connecting ring 74 and dustproof ring 71, dust cover 73 unfolds and folds with piston 2. Dust cover 73 protects the gap between piston 2 and cylinder 1.
Claims
1. A rotary cylinder with a tail-end water injection function, comprising a cylinder body (1), characterized in that: A cylinder cover (3) is fixed on the cylinder body (1). A piston (2) is slidably connected inside the cylinder body (1). One end of the piston (2) passes through the cylinder body (1) and is slidably connected to the cylinder body (1). A valve core (4) is fixed on the cylinder cover (3). One end of the valve core (4) passes through the cylinder cover (3) and is slidably connected to the piston (2). A valve body (5) is rotatably connected to the valve core (4). A valve cover (8) is fixed on the valve body (5). A water injection mechanism (6) is provided on the valve core (4). An auxiliary dustproof mechanism (7) is provided between the cylinder body (1) and the piston (2). The auxiliary dustproof mechanism (7) includes a dustproof ring one (71) fixed on the cylinder body (1). A dustproof ring two (72) is fixed at one end of the piston (2) extending out of the cylinder body (1). A dustproof cover (73) is provided between the dustproof ring one (71) and the dustproof ring two (72).
2. A rotary cylinder with tail-end water injection function according to claim 1, characterized in that: The water injection mechanism (6) includes a skeleton oil seal (61) disposed between the valve cover (8) and the valve core (4). The valve core (4) has a water injection hole (62) that penetrates the valve core (4). The piston (2) has a water outlet hole in the middle that penetrates the piston (2). The water injection hole (62) corresponds to the water outlet hole on the piston (2). The valve cover (8) has a water inlet hole at the end away from the valve body (5). The water injection hole (62) corresponds to the water inlet hole on the valve cover (8). A sealing component one (63) is disposed between the valve core (4) and the valve cover (8). A sealing component two (64) is disposed between the valve core (4) and the piston (2).
3. A rotary cylinder with tail-end water injection function according to claim 2, characterized in that: The sealing assembly (63) includes a sealing element (631) disposed between the valve core (4) and the valve cover (8). The sealing element (631) has a through hole, which corresponds to the water injection hole (62) on the valve core (4) and the water inlet hole on the valve cover (8). A sealing spring (632) is disposed between the sealing element (631) and the valve cover (8). The sealing element (631) has a limiting groove, and the sealing spring (632) is located in the limiting groove. Both ends of the sealing spring (632) abut against the sealing element (631) and the valve cover (8). An auxiliary sealing ring (633) is fixed between the sealing element (631) and the valve cover (8).
4. A rotary cylinder with tail-end water injection function according to claim 2, characterized in that: The second sealing assembly (64) includes an O-ring (641) fixed to the inner wall of the outlet hole of the piston (2), a star-shaped sealing ring (642) fixed to the inner wall of the outlet hole of the piston (2), and the valve core (4) extending into the outlet hole of the piston (2) at one end near the piston (2). The valve core (4) abuts against the O-ring (641) and the star-shaped sealing ring (642).
5. A rotary cylinder with tail-end water injection function according to claim 4, characterized in that: The inner walls of the water injection hole (62) and the water outlet hole are coated with a protective layer, which is a polytetrafluoroethylene coating.
6. A rotary cylinder with tail-end water injection function according to claim 5, characterized in that: The dust cover (73) has a connecting ring (74) fixed at one end near the dust ring (71). The dust ring (71) has a snap-fit groove corresponding to the connecting ring (74). The dust cover (73) has a connecting ring (75) fixed at one end near the dust ring (72). The dust ring (72) has a snap-fit groove corresponding to the connecting ring (75). Both the connecting ring (74) and the connecting ring (75) are rubber rings.
7. A rotary cylinder with tail-end water injection function according to claim 6, characterized in that: The dust cover (73) is folded and is a rubber cover.