Cylinder and control system
By setting buffer air holes and a multi-chamber structure in the cylinder, and using the air pressure difference to control the movement of the piston assembly, the problem of unstable vibration reduction effect of existing cylinders is solved, and stability and efficiency are improved.
Patent Information
- Application Number
- CN202520450149.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing cylinder vibration damping methods are unstable, rubber pads are prone to failure, and one-way valves and pressure limiting methods reduce movement speed, failing to meet various usage requirements.
A buffer vent is set inside the cylinder body. The air pressure is changed through the gas inlet and outlet channels to control the movement of the piston assembly. The cylinder is divided into multiple chambers, and the air pressure difference is used for buffering and control.
It improves the stability and effectiveness of the buffer, optimizes the vibration reduction effect of the cylinder, and meets the usage requirements of different scenarios.
Smart Images
Figure CN223708147U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of driving, in particular to a cylinder and a control system. BACKGROUND
[0002] As a common driving mode, the cylinder is widely used in various industries. There are various forms of common cylinders, but the main structural principles are roughly the same, and they are also relatively common in actual use. Nowadays, with the substantial increase in the requirements for device reliability, cleanliness, etc., the requirements for the cylinder are also gradually increasing, for example, the vibration value is a common requirement for the cylinder. Excessive vibration value can greatly shorten the service life of the cylinder, and in severe cases, it can cause the device to malfunction, and it can also cause the device using the cylinder to output force to malfunction or abnormally.
[0003] Currently, the vibration value is usually reduced by increasing rubber pads for buffering, adding check valves to the gas circuit, limiting air pressure, etc. Rubber pad damping usually fails due to aging of the rubber pad or changes in the actual working position in the cylinder, and the addition of check valves and the limitation of air pressure usually significantly reduces the movement speed of the cylinder, making the opening or closing time of the device longer. Therefore, the current cylinder damping method is unstable and adversely affects the normal use of the cylinder, has poor damping effect, and cannot meet the use requirements of various different scenarios. CONTENT OF THE UTILITY MODEL
[0004] Therefore, the purpose of the embodiments of the present application is to provide a cylinder and a control system to improve the problem of poor cylinder damping effect caused by poor buffering effect in the prior art.
[0005] To solve the above problems, in a first aspect, the embodiments of the present application provide a cylinder, which comprises: a cylinder body, a cylinder cover assembly, and a piston assembly.
[0006] The cylinder cover assembly is arranged at the end of the cylinder body, the first end of the piston assembly is movably arranged inside the cylinder body, and the second end of the piston assembly passes through the cylinder cover assembly.
[0007] The piston assembly is provided with a buffer gas hole on the cylinder cover assembly, the buffer gas hole is configured to input gas into the inside of the cylinder body or release the gas inside the cylinder body, and the piston assembly moves based on the internal pressure of the cylinder body.
[0008] In the implementation process, the buffer gas hole is arranged on the cylinder cover assembly at the end of the cylinder body, the buffer gas hole is used as a gas inlet and outlet channel, gas is input into the interior of the cylinder body or gas in the interior of the cylinder body is discharged, the gas pressure in the interior of the cylinder body is changed through the transmission of the gas, and the movement of the piston assembly in the interior of the cylinder body is buffered based on the change of the gas pressure, the complexity and material cost of the buffering structure are effectively reduced, the movement speed of the piston assembly is not greatly affected, the stability and effectiveness of the buffering are improved, the damping effect of the cylinder is optimized, and the use requirements in various scenes are met.
[0009] Optionally, the piston assembly comprises a sliding piece and a piston shaft.
[0010] The first end of the piston shaft is fixedly arranged on the sliding piece, and the second end of the piston shaft passes through the cylinder cover assembly and contacts an external controlled device.
[0011] The sliding piece movably abuts against the inner wall of the cylinder body, and the sliding piece is used to drive the piston shaft to move.
[0012] The interior of the cylinder body is divided into a first cavity and a second cavity based on the sliding piece.
[0013] In the implementation process, the piston assembly can comprise a sliding piece movably abutting against the inner wall of the cylinder body and a piston shaft fixed on the sliding piece, the sliding piece can move to abut against the inner wall of the cylinder body based on the pressure change in the interior of the cylinder body, and drive the fixed piston shaft to move together, and since the edge of the sliding piece movably abuts against the inner wall of the cylinder body, the interior of the cylinder body is divided into a first cavity and a second cavity with variable sizes based on the sliding piece, the sliding piece is controlled to move according to the pressure difference between the first cavity and the second cavity, the second end of the piston shaft passing through the cylinder cover assembly is controlled to move, and the external controlled device is contactively controlled according to the movement position of the second end of the piston shaft. The interior of the cylinder body can be divided into two cavities through the piston assembly, and the effectiveness and efficiency of the movement control based on the pressure difference between the cavities are effectively improved.
[0014] Optionally, the cylinder cover assembly comprises a first cylinder cover, the buffer gas hole comprises a first gas hole, the first gas hole is arranged on the first cylinder cover, and the first cylinder cover is provided with a first flow channel.
[0015] The first cavity is formed between the first cylinder cover and the sliding piece.
[0016] The first flow channel is used to provide a gas inlet and outlet channel for the first cavity.
[0017] In the case that the slider is located at the first working position close to the first cylinder head, the first end of the piston shaft is in contact with the inner wall of the first flow channel, the first flow channel is closed, and the first gas hole is configured to input gas into the interior of the first cavity or discharge gas in the interior of the first cavity.
[0018] In the implementation process, the first cylinder head is arranged in the cylinder head assembly, the first cylinder head is provided with the first gas hole and the first flow channel, the first cavity is formed by the first cylinder and the slider, and the first flow channel serves as a gas inlet and outlet channel of the first cavity. In the case that the slider moves to the first working position in contact with the first cylinder head, the first end of the piston shaft is in contact with the inner wall of the first flow channel, so that the first flow channel is closed, and the first gas hole serves as a temporary gas inlet and outlet channel of the first cavity when the first flow channel is closed, so as to input gas into the interior of the first cavity or discharge gas in the interior of the first cavity. That is, in the case that the first flow channel is closed, the volume of the first cavity is changed by the first gas hole. Since the diameter of the buffer gas hole is small, gas can only slowly enter and exit through the gas hole with a small diameter, thereby effectively reducing the speed of the slider driven by the gas in the two cavities to move, achieving a buffering effect, thereby reducing the vibration intensity of the cylinder caused by the movement of the slider and achieving a damping effect. The movement of the slider shaft can be buffered by the first gas hole when the slider moves to the vicinity of the first cylinder head, thereby effectively reducing the vibration caused by the excessive speed of the slider.
[0019] Optionally, in the case that the slider is located at a position other than the first working position, the first flow channel is open, and the first flow channel and the first gas hole are configured to input gas into the interior of the first cavity or discharge gas in the interior of the first cavity.
[0020] In the implementation process, in the case that the slider is located at a position other than the first working position, that is, the slider is not in contact with or in the vicinity of the first cylinder head, the first end of the piston shaft is not located in the interior of the first flow channel, so that the first flow channel is open, and the first flow channel and the first gas hole simultaneously serve as a gas inlet and outlet channel of the first cavity. Since the diameter of the first flow channel is large, gas can enter and exit the first cavity at a faster speed, that is, the pressure change speed in the interior of the first cavity is fast, and the piston assembly can move at a faster speed, thereby effectively improving the movement speed of the piston assembly on the premise of achieving a buffering effect, and improving the control efficiency of the cylinder on the external controlled equipment.
[0021] Optionally, the cylinder head assembly comprises a second cylinder head, the buffer gas hole comprises a second gas hole arranged on the second cylinder head, and the second cylinder head is provided with a second flow channel.
[0022] The second cavity is formed between the second cylinder head and the slider.
[0023] The second end of the piston shaft passes through the second flow channel and contacts the controlled device outside;
[0024] The second flow channel is configured to provide a gas inlet and outlet passage for the second cavity;
[0025] When the slider is located in the second working position close to the second cylinder head, the second end of the piston shaft is in contact with the inner wall of the second flow channel, the second flow channel is closed, and the second gas hole is configured to input gas into the interior of the second cavity or release gas in the interior of the second cavity.
[0026] In the above implementation process, the second cylinder head can be provided in the cylinder head assembly, and the second gas hole and the second flow channel are provided on the second cylinder head. The second cavity is formed by the second cylinder and the slider, and the second flow channel serves as the gas inlet and outlet passage of the second cavity. When the slider moves to the first working position in contact with the second cylinder head, the second end of the piston shaft is in contact with the inner wall of the second flow channel, so that the second flow channel is closed. Therefore, the second gas hole serves as the temporary gas inlet and outlet passage of the second cavity when the second flow channel is closed, and gas is input into the interior of the second cavity or released from the interior of the second cavity. That is, the volume of the second cavity is controlled by the second gas hole when the second flow channel is closed. Since the aperture of the buffer gas hole is small, gas can only slowly enter and exit through the gas hole with a small aperture, thereby effectively reducing the speed of the slider driven by the gas in the two cavities to move, achieving a buffering effect, thereby reducing the vibration intensity of the cylinder caused by the movement of the slider, and achieving a damping effect. The movement of the slider shaft can be buffered by the second gas hole when the slider moves to the vicinity of the second cylinder head, effectively reducing the vibration caused by the excessive speed of the slider.
[0027] Optionally, the outer wall of the second end of the piston shaft has a diameter d1, the inner wall of the second flow channel has a diameter d2, and d1 < d2;
[0028] When the slider is located in a position other than the second working position, a gap exists between the second flow channel and the piston shaft;
[0029] The gap and the second gas hole are configured to input gas into the interior of the second cavity or release gas in the interior of the second cavity.
[0030] In the implementation process, since the second end of the piston shaft passes through the second cylinder cover, in order to realize the normal gas inlet and outlet function inside the second flow channel, the outer wall diameter of the second end of the piston shaft can be smaller than the inner wall diameter of the second flow channel, so that when the sliding piece is in the non-second working position, that is, the sliding piece does not fit the second cylinder cover and is not near the second cylinder cover, a corresponding gap is formed between the second flow channel and the piston shaft, which can simultaneously serve as a gas inlet and outlet passage of the second cavity. Since the gap has a large aperture, the gas can enter and exit the second cavity at a faster speed, that is, the gas pressure in the second cavity changes at a faster speed, and the piston assembly can move at a faster speed, effectively improving the movement speed of the piston assembly under the premise of realizing the buffering effect, thereby improving the control efficiency of the cylinder on the external controlled equipment.
[0031] Optionally, a protruding structure is arranged on the output section between the second end of the piston shaft and the sliding piece, close to the position of the sliding piece, and the outer wall diameter of the protruding structure is d3, d1
[0032] The outer wall parameter of the protruding structure is determined based on the inner wall parameter of the second flow channel.
[0033] The protruding structure is used to fit the inner wall of the second flow channel at the second working position.
[0034] In the implementation process, in order to enable the second end of the piston shaft to open and close the second flow channel based on movement, a protruding structure having an outer wall diameter greater than that of the non-protruding section and smaller than that of the second flow channel can be arranged on the output section between the second end of the piston shaft and the sliding piece, close to the position of the sliding piece. The outer wall parameter of the protruding structure can be determined according to the inner wall parameter of the second flow channel, so that when the sliding piece moves to the second working position, the protruding structure can fit the inner wall of the second flow channel, thereby closing the second flow channel and realizing the corresponding buffering effect through the second gas hole.
[0035] Optionally, the piston assembly further comprises a sealing piece.
[0036] A groove structure is arranged on the contact surface of the sliding piece in contact with the inner wall of the cylinder body.
[0037] The sealing piece is arranged in the groove structure, and the sealing piece is used to isolate and seal the two ends of the sliding piece.
[0038] In the implementation process, the sliding member is movably attached to the inner wall of the cylinder body. In order to reduce the wear caused by the movement of the sliding member, a groove structure can be arranged on the contact surface of the sliding member and the inner wall of the cylinder body. A sealing member is arranged in the groove structure to reduce the wear of the sliding member and the inner wall of the cylinder body. The sealing member can also isolate and seal the two sides of the sliding member, so that the sliding member can divide the inner part of the cylinder body into two cavities, reduce the adverse effects caused by the gas flow between the first cavity and the second cavity, improve the independence of the first cavity and the second cavity, and further improve the precision and effectiveness of the movement control of the piston assembly based on the pressure difference between the two cavities.
[0039] Optionally, the first end of the buffer gas hole is in communication with the inside of the cylinder body, and the second end of the buffer gas hole is connected with an external gas pressure device.
[0040] The aperture parameter between the first end of the buffer gas hole and the second end of the buffer gas hole is determined based on the structural parameters of the cylinder body, the movement parameters of the piston assembly, and the vibration condition of the cylinder body.
[0041] In the implementation process, the first end of the buffer gas hole is connected to the inside of the cylinder body, and the second end is connected to an external gas pressure device to input gas into the inside of the cylinder body or release gas from the inside of the cylinder body, thereby realizing the corresponding gas transmission function. The aperture parameter between the two ends is determined according to the structural parameters of the cylinder body, the movement parameters of the piston assembly, and the vibration condition of the cylinder body, so as to provide different gas in-out speeds of different sizes through different gas hole apertures, and to provide corresponding buffer and damping functions in different application scenarios.
[0042] In a second aspect, the embodiments of the present application also provide a control system, which comprises a controlled device and the cylinder of any one of the above.
[0043] The cylinder is in contactable connection with the controlled device.
[0044] The second end of the piston assembly in the cylinder controls the controlled device based on movement.
[0045] In the implementation process, the cylinder is in contactable connection with the controlled device, and the second end of the piston assembly in the cylinder can be in contact or non-contact with the controlled device based on the movement of the second end of the piston assembly, thereby controlling the controlled device, effectively improving the efficiency, stability and precision of using the cylinder for control.
[0046] In summary, the embodiment of the present application provides a cylinder and a control system, using a buffer gas hole as a gas inlet and outlet channel, buffering the movement of the piston assembly inside the cylinder body, effectively improving the stability and effectiveness of the buffer, thereby optimizing the damping effect of the cylinder. BRIEF DESCRIPTION OF DRAWINGS
[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0048] Figure 1 A cross-sectional structure schematic diagram of a cylinder provided by the embodiment of the present application is shown in the figure.
[0049] Figure 2 Another cross-sectional structure schematic diagram of a cylinder provided by the embodiment of the present application is shown in the figure.
[0050] Figure 3 A physical cross-sectional structure schematic diagram of a cylinder provided by the embodiment of the present application is shown in the figure.
[0051] Figure 4 A structure schematic diagram of a control system provided by the embodiment of the present application is shown in the figure.
[0052] Figure legend: 100-cylinder; 200-controlled device; 110-cylinder body; 120-cylinder cover assembly; 130-piston assembly; 140-buffer gas hole; 131-sliding part; 132-piston shaft; 1311-sealing part; 1312-groove structure; A1-first cavity; A2-second cavity; 121-first cylinder cover; 141-first gas hole; 122-first flow channel; 123-second cylinder cover; 142-second gas hole; 124-second flow channel; 1321-protruding structure; 151-joint. DETAILED DESCRIPTION
[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0054] In the existing damping scheme, the vibration value is usually reduced by increasing the rubber pad buffer, adding a one-way valve in the air path, limiting the air pressure and the like. However, the rubber pad damping usually has problems such as damping failure due to aging of the rubber pad and change of the actual working position in the cylinder, and the one-way valve and the limited air pressure usually significantly reduce the movement speed of the cylinder, so that the opening or closing time of the equipment is longer. Therefore, the current cylinder damping method is unstable and has adverse effects on the normal use of the cylinder, and the damping effect is poor, which cannot meet the use requirements of various scenes.
[0055] To solve the above problems, the embodiment of the present application provides a cylinder, which is arranged in a control system, such as a valve device, a switching device and the like, and can use a buffer air hole as a gas inlet and outlet channel to buffer the movement of a piston assembly inside a cylinder body, thereby effectively improving the stability and effectiveness of the buffer and optimizing the damping effect of the cylinder.
[0056] Please refer to Figure 1 , Figure 1 A cross-sectional structure diagram of a cylinder is provided in the embodiment of the present application, which can include a cylinder body 110, a cylinder cover assembly 120 and a piston assembly 130.
[0057] The cylinder cover assembly 120 is arranged at the end of the cylinder body 110, the first end of the piston assembly 130 is movably arranged inside the cylinder body 110, and the second end of the piston assembly 130 passes through the cylinder cover assembly 120.
[0058] Optionally, the cylinder body 110 can be the overall bearing structure of the cylinder, which can be arranged in a cylindrical structure of various shapes, such as a cylindrical structure, and the material of the cylinder body 110 can be selected according to actual requirements, for example, stainless steel material is selected as the cylinder body 110, so that the cylinder body 110 can withstand a large air pressure without deformation, and the cylindrical structure guides the movement of the piston assembly 130. The cylinder cover assembly 120 can be a cover structure matched with the shape of the end of the cylinder body 110, for example, when the cylinder body 110 is a cylindrical structure, the cylinder cover assembly 120 can include a circular cover structure, and the shape of the circular cover structure is matched with the end of the cylindrical structure. The cylinder cover assembly 120 can also select various materials according to actual requirements, such as stainless steel material, and the cylinder cover assembly 120 can be connected with the cylinder body 110 by screw connection or welding, so as to form a closed space inside the cylinder body 110. The piston assembly 130 can also select corresponding materials according to actual requirements and driving conditions, such as metal material or plastic material, and the edge of the piston assembly 130 can be attached to the inner wall of the cylinder body 110, so as to drive the piston assembly 130 to move based on the air pressure in the cylinder body 110.
[0059] Optionally, the cylinder cover assembly 120 can be provided with a corresponding through hole, so that the second end of the piston assembly 130 can pass through the cylinder cover assembly 120. The second end of the piston assembly 130 passing through the cylinder cover assembly 120 can be connected with various types of controlled devices outside, so as to control the controlled devices through the movement of the piston assembly 130.
[0060] It should be noted that the cylinder cover assembly 120 is provided with a buffer gas hole 140, which is configured to input gas into the inside of the cylinder body 110 or release gas in the inside of the cylinder body 110, and the piston assembly 130 moves based on the internal pressure of the cylinder body 110.
[0061] Optionally, in order to improve the sealing performance of the space formed between the cylinder cover assembly 120 and the cylinder body 110, a corresponding rubber sealing ring or other sealing structure can be arranged at the connection between the cylinder cover assembly 120 and the cylinder body 110, so as to reduce the adverse situation that the piston assembly 130 cannot move normally due to poor sealing performance.
[0062] Among them, since the cylinder cover assembly 120 and the cylinder body 110 can form a closed space, in order to change the position of the piston assembly 130 in the inside of the cylinder body 110, the buffer gas hole 140 arranged on the cylinder cover assembly 120 can be used as a gas inlet and outlet channel between the closed space in the inside of the cylinder body 110 and the outside, so as to adjust the position of the piston assembly 130 by changing the gas pressure in the closed space in the inside of the cylinder body 110.
[0063] Optionally, in the cylindrical structure of the cylinder body 110, the piston assembly 130 can move in two directions, that is, the piston assembly 130 can move towards the two ends of the cylindrical structure.
[0064] For example, the buffer gas hole 140 can be arranged as a circular hole structure with a small hole diameter, so as to limit the speed of gas entering and exiting the inside of the cylinder body 110 through the small hole diameter, thereby realizing the corresponding buffering effect.
[0065] In Figure 1 In the embodiment shown, the gas pressure in the inside of the cylinder body 110 can be changed by the transmission of gas, so as to buffer the movement of the piston assembly 130 in the inside of the cylinder body 110 based on the change of the gas pressure, effectively reducing the complexity and material cost of the buffering structure, and without causing a large impact on the movement speed of the piston assembly 130, improving the stability and effectiveness of the buffering, thereby optimizing the damping effect of the cylinder, and meeting the use requirements of various different scenes.
[0066] Optionally, please refer to Figure 2 , Figure 2Another cross-sectional structure of a cylinder provided by an embodiment of the present application is shown in FIG. 6.
[0067] Optionally, the piston assembly 130 can include a sliding member 131 and a piston shaft 132, wherein a first end of the piston shaft 132 is fixedly arranged on the sliding member 131, and a second end of the piston shaft 132 is in contact with an external controlled device through the cylinder head assembly 120. The sliding member 131 is movably attached to the inner wall of the cylinder body 110, and is used to drive the piston shaft 132 to move. The interior of the cylinder body 110 is divided into a first cavity A1 and a second cavity A2 based on the sliding member 131. The piston assembly 130 can include a sliding member 131 movably attached to the inner wall of the cylinder body 110 and a piston shaft 132 fixedly arranged on the sliding member 131. The sliding member 131 can move along the inner wall of the cylinder body 110 based on the pressure change in the interior of the cylinder body 110, and drive the fixed piston shaft 132 to move together. Since the edge of the sliding member 131 is movably attached to the inner wall of the cylinder body 110, the interior of the cylinder body 110 is divided into a first cavity A1 and a second cavity A2 with variable sizes based on the sliding member 131. The movement of the sliding member 131 is controlled according to the pressure difference between the first cavity A1 and the second cavity A2, so as to control the movement of the second end of the piston shaft 132 through the cylinder head assembly 120, and to contactively control the external controlled device according to the position of the second end of the piston shaft 132. The interior of the cylinder body 110 is divided into two cavities by the piston assembly 130, which effectively improves the effectiveness and efficiency of the movement control based on the pressure difference between the cavities.
[0068] For example, the piston shaft 132 can be a rod-shaped moving shaft or the like, and the sliding member 131 can be a ring-shaped member matching the shape of the inner wall of the cylinder body 110. For example, when the cylinder body 110 is a cylindrical structure, the sliding member 131 can be a circular ring-shaped member. The outer ring diameter of the circular ring-shaped member corresponds to the inner wall diameter of the cylinder body 110, and the inner ring diameter of the circular ring-shaped member corresponds to the outer diameter of the piston shaft 132, so that the circular ring-shaped member can be movably attached to the inner wall of the cylinder body 110, and the piston shaft 132 can pass through the circular ring-shaped member and be fixedly arranged on the circular ring-shaped member, so that the sliding member 131 can drive the piston shaft 132 to move based on its own movement.
[0069] For example, the piston shaft 132 can be fixed in the sliding piece 131 by screws, nuts, welding, bonding, etc. Considering that if gas transmission occurs between the first cavity A1 and the second cavity A2, the piston assembly 130 cannot change normally based on the pressure difference, which will cause the piston assembly 130 to malfunction. Therefore, in order to reduce the adverse effects caused by gas transmission between the first cavity A1 and the second cavity A2, a corresponding piston shaft 132 sealing piece 1311 can also be provided, such as a sealing ring, sealing glue, etc. Structure is arranged at the connection to seal the connection between the piston shaft 132 and the sliding piece 131.
[0070] Optionally, the piston assembly 130 can also include a sealing piece 1311, which can be a corresponding dynamic sealing ring or the like. The contact surface of the sliding piece 131 in contact with the inner wall of the cylinder body 110 is provided with a groove structure 1312, the inner wall of the groove structure 1312 and the outer wall of the sealing piece 1311 are matched in shape, the sealing piece 1311 is arranged in the groove structure 1312, and the sealing piece 1311 is used to isolate and seal both ends of the sliding piece 131, to reduce the gas flow between the first cavity A1 and the second cavity A2. Because the sliding piece 131 and the inner wall of the cylinder body 110 are movably arranged, in order to reduce the wear caused by the movement of the sliding piece 131, the contact surface of the sliding piece 131 in contact with the inner wall of the cylinder body 110 can be provided with a corresponding groove structure 1312, and the groove structure 1312 is provided with a corresponding sealing piece 1311 inside, to reduce the wear of the sliding piece 131 and the inner wall of the cylinder body 110 by the sealing piece 1311, and the sealing piece 1311 can also isolate and seal both sides of the sliding piece 131, so that the sliding piece 131 can divide the inner wall of the cylinder body 110 into two cavities, reduce the adverse effects caused by gas flow between the first cavity A1 and the second cavity A2, and improve the independence of the first cavity A1 and the second cavity A2, thereby improving the accuracy and effectiveness of the movement control of the piston assembly 130 based on the pressure difference between the two cavities.
[0071] Optionally, the cylinder head assembly 120 can include a first cylinder head 121, and correspondingly, the buffer gas hole 140 can include a first gas hole 141, the first gas hole 141 being arranged on the first cylinder head 121, and the first cylinder head 121 being provided with a first flow channel 122. The first cavity A1 is formed between the first cylinder head 121 and the sliding piece 131, and the first flow channel 122 is used to provide a gas inlet and outlet passage for the first cavity A1. When the sliding piece 131 is located at the first working position close to the first cylinder head 121, the first end of the piston shaft 132 is in contact with the inner wall of the first flow channel 122, the first flow channel 122 is closed, and the first gas hole 141 is configured to input gas into the inside of the first cavity A1 or discharge gas in the first cavity A1. The first cylinder head 121 can be arranged in the cylinder head assembly 120, and the first cylinder head 121 is provided with the first gas hole 141 and the first flow channel 122. The first cavity A1 is formed by the first cylinder and the sliding piece 131, and the first flow channel 122 serves as the gas inlet and outlet passage of the first cavity A1. When the sliding piece 131 moves to the first working position in contact with the first cylinder head 121, the first end of the piston shaft 132 is in contact with the inner wall of the first flow channel 122, so that the first flow channel 122 is closed. Therefore, the first gas hole 141 serves as a temporary gas inlet and outlet passage of the first cavity A1 when the first flow channel 122 is closed, and inputs gas into the inside of the first cavity A1 or discharges gas in the first cavity A1, that is, the volume change of the first cavity A1 is controlled by the first gas hole 141 when the first flow channel 122 is closed.
[0072] It should be noted that the shape of the inner wall of the first flow channel 122 is in contact with the shape of the outer wall of the first end of the piston shaft 132, and the aperture of the first flow channel 122 is much larger than the aperture of the first gas hole 141. Since the aperture of the buffer gas hole 140 is small, gas can only slowly enter and exit through the gas hole with a small aperture, thereby effectively reducing the speed of the gas in the two cavities to drive the sliding piece 131 to move, achieving a buffering effect, thereby reducing the vibration intensity of the cylinder caused by the movement of the sliding piece 131, and achieving a vibration reduction effect. The movement of the sliding shaft can be buffered by the first gas hole 141 when the sliding piece 131 moves to the vicinity of the first cylinder head 121, effectively reducing the vibration caused by the excessive speed of the sliding piece 131.
[0073] It should be noted that the first cylinder head 121 is arranged at the end close to the first end of the piston shaft 132, and the first working position can be a position interval, that is, a part of the piston shaft 132 can enter the inside of the first flow channel 122 to be the corresponding first working position. Therefore, when the sliding piece 131 moves to the first working position close to the first cylinder head 121, the first end of the piston shaft 132 can enter the inside of the first flow channel 122 to close the first flow channel 122.
[0074] Optionally, when the sliding member 131 is in the non-first working position, the first flow channel 122 is open, and the first flow channel 122 and the first gas hole 141 are configured to input gas into the interior of the first cavity A1 or to release gas in the interior of the first cavity A1. When the sliding member 131 is in the non-first working position, i.e. the sliding member 131 is not attached to or near the first cylinder cover 121, i.e. the first end of the piston shaft 132 is not in the interior of the first flow channel 122, because there is no blockage of the piston shaft 132, the first flow channel 122 is open, and the first flow channel 122 and the first gas hole 141 can simultaneously serve as the gas inlet and outlet channel of the first cavity A1. Because the aperture of the first flow channel 122 is large, the gas can enter and exit the first cavity A1 at a faster speed, i.e. the speed of change of the gas pressure in the interior of the first cavity A1 is faster, and the piston assembly 130 can move at a faster speed, effectively improving the movement speed of the piston assembly 130 under the premise of achieving the buffering effect, thereby improving the control efficiency of the cylinder on the external controlled equipment.
[0075] For example, the first flow channel 122 and the first gas hole 141 can be connected to an external gas pressure device, and the gas pressure device can provide the first flow channel 122 and the first gas hole 141 with gas extraction or gas filling services, so as to control the speed of change of the gas pressure in the interior of the first cavity A1 according to the opening and closing of the first flow channel 122 and the small aperture passage of the first gas hole 141.
[0076] Optionally, the cylinder head assembly 120 can comprise a second cylinder head 123, and correspondingly, the buffer gas hole 140 can comprise a second gas hole 142, which is arranged on the second cylinder head 123, and the second cylinder head 123 is provided with a second flow channel 124. The second cavity A2 is formed between the second cylinder head 123 and the sliding part 131, and the second end of the piston shaft 132 is in contact with the outside of the controlled device through the second flow channel 124, and the second flow channel 124 is used to provide a gas inlet and outlet passage for the second cavity A2. When the sliding part 131 is located at the second working position close to the second cylinder head 123, the second end of the piston shaft 132 is in contact with the inner wall of the second flow channel 124, the second flow channel 124 is closed, and the second gas hole 142 is configured to input gas into the inside of the second cavity A2 or discharge gas in the second cavity A2. The second cylinder head 123 can be arranged in the cylinder head assembly 120, and the second gas hole 142 and the second flow channel 124 are arranged on the second cylinder head 123. The second cavity A2 is formed between the second cylinder head 123 and the sliding part 131, and the second flow channel 124 is used as the gas inlet and outlet passage of the second cavity A2. When the sliding part 131 moves to the first working position close to the second cylinder head 123, the second end of the piston shaft 132 is in contact with the inner wall of the second flow channel 124, so that the second flow channel 124 is closed, and therefore, the second gas hole 142 is used as the temporary gas inlet and outlet passage of the second cavity A2 when the second flow channel 124 is closed, and gas is input into the inside of the second cavity A2 or discharged from the inside of the second cavity A2, that is, the volume change of the second cavity A2 is controlled by the second gas hole 142 when the second flow channel 124 is closed.
[0077] It should be noted that the aperture of the second flow channel 124 can be larger than the outer diameter of the second end of the piston shaft 132, and the aperture of the second flow channel 124 is much larger than the aperture of the second gas hole 142. Because the aperture of the buffer gas hole 140 is small, gas can only slowly enter and exit through the gas hole with a small aperture, thereby effectively reducing the speed of the gas in the two cavities to drive the sliding part 131 to move, achieving a buffering effect, thereby reducing the vibration intensity of the cylinder caused by the movement of the sliding part 131, and achieving a damping effect. The movement of the sliding shaft can be buffered by the second gas hole 142 when the sliding part 131 moves close to the second cylinder head 123, effectively reducing the vibration caused by the excessive speed of the sliding part 131.
[0078] It should be noted that the second cylinder head 123 is arranged close to the end of the second end of the piston shaft 132, and the second working position can be a position interval, that is, a part of the piston shaft 132 can enter the inside of the second flow channel 124 to close the second flow channel 124, which is the corresponding second working position. Therefore, when the sliding part 131 moves to the second working position close to the second cylinder head 123, the second end of the piston shaft 132 can be in contact with the inside of the second flow channel 124 to close the second flow channel 124.
[0079] Optionally, since the second end of the piston shaft 132 passes through the second cylinder cover 123, the end of the second end of the piston shaft 132 is always located outside the cylinder body 110, therefore, in order to normally control the opening of the second flow channel 124 to realize the normal gas in-out function, the outer wall diameter of the second end of the piston shaft 132 is d1, the inner wall diameter of the second flow channel 124 is d2, d1 < d2, in the case that the sliding piece 131 is located at the non-second working position, there is a gap between the second flow channel 124 and the piston shaft 132, and the gap and the second gas hole 142 are configured to input gas into the inside of the second cavity A2 or discharge gas in the second cavity A2. The outer wall diameter of the second end of the piston shaft 132 can be smaller than the inner wall diameter of the second flow channel 124, so that in the case that the sliding piece 131 is at the non-second working position, i.e. the sliding piece 131 does not fit the second cylinder cover 123 and is not near the second cylinder cover 123, a corresponding gap is formed between the second flow channel 124 and the piston shaft 132, which can simultaneously serve as the gas in-out passage of the second cavity A2 by means of the gap and the second gas hole 142. Since the aperture of the gap is large, the gas can enter and exit the second cavity A2 at a faster speed, i.e. the pressure change speed of the inside of the second cavity A2 is faster, and the piston assembly 130 can move at a faster speed, thereby effectively improving the moving speed of the piston assembly 130 on the premise of realizing the buffering effect, and improving the control efficiency of the cylinder on the external controlled equipment.
[0080] It should be noted that, in order to enable the second end of the piston shaft 132 to open and close the second flow channel 124 based on movement, a protruding structure 1321 is arranged on the output section between the second end of the piston shaft 132 and the sliding piece 131, close to the sliding piece 131, the outer wall diameter of the protruding structure 1321 is d3, d1 < d3 < d2, the outer wall parameters of the protruding structure 1321 are determined based on the inner wall parameters of the second flow channel 124, which can include the outer wall shape and the outer wall diameter, so that the outer wall of the protruding structure 1321 matches the shape and size of the inner wall of the second flow channel 124, and d3 is smaller than d2 and approaches d2, so that the protruding structure 1321 can normally enter the second flow channel 124 and fit the inner wall of the second flow channel 124 at the second working position. A protruding structure 1321 with an outer wall diameter larger than that of the non-protruding section and smaller than that of the inner wall of the second flow channel 124 can be arranged on the output section between the second end of the piston shaft 132 and the sliding piece 131, close to the sliding piece 131, and the outer wall parameters of the protruding structure 1321 can be determined according to the inner wall parameters of the second flow channel 124, so that when the sliding piece 131 moves to the second working position, the protruding structure 1321 can fit the inner wall of the second flow channel 124, thereby closing the second flow channel 124 and realizing the corresponding buffering effect by means of the second gas hole 142.
[0081] For example, the second flow channel 124 and the second gas hole 142 can be connected with an external air pressure device, which can provide air suction or air charging service for the second flow channel 124 and the second gas hole 142, so as to control the speed of the change of the internal air pressure of the second cavity A2 according to the closing and opening of the second flow channel 124 and the small aperture passage of the second gas hole 142.
[0082] It should be noted that the gas in-out of the first cavity A1 and the second cavity A2 is opposite, for example, when the first cavity A1 is in the air inlet state, the second cavity A2 is in the air outlet state, and the piston assembly 130 moves towards the second cylinder cover 123; when the second cavity A2 is in the air inlet state, the first cavity A1 is in the air outlet state, and the piston assembly 130 moves towards the first cylinder cover 121.
[0083] It should be noted that the first end of the buffer gas hole 140 is connected with the inside of the cylinder main body 110, and the second end of the buffer gas hole 140 is connected with an external air pressure device to input gas into the inside of the cylinder main body 110 or discharge the gas in the cylinder main body 110, so as to realize the corresponding gas transmission function. The aperture parameter between the first end of the buffer gas hole 140 and the second end of the buffer gas hole 140 is determined based on the structure parameter of the cylinder main body 110, the motion parameter of the piston assembly 130 and the vibration condition of the cylinder main body 110. The aperture parameter between the two ends is determined according to the structure parameter of the cylinder main body 110, the motion parameter of the piston assembly 130 and the vibration condition of the cylinder main body 110, so as to provide different gas in-out speeds of different sizes through different gas hole apertures, which can provide corresponding buffer damping functions in different application scenarios.
[0084] For example, the structure parameter of the cylinder main body 110 can include the shape, volume and other parameters of the inside of the cylinder main body 110, the motion parameter of the piston assembly 130 can include the size, weight and force required to move the piston assembly 130, and the vibration condition of the cylinder main body 110 can be the vibration threshold of the cylinder main body 110. The aperture parameter can include the aperture and length, for example, in the test condition, when the aperture is 0.1 mm, the cylinder vibration value is 0.1 G, when the aperture is 0.2 mm, the cylinder vibration is 0.4 G, etc. The corresponding aperture parameter can be selected and set according to the actual demand. In addition, the number and distribution position of the buffer gas hole 140 can also be set according to the actual situation, for example, two first gas holes 141 and two second gas holes 142 are selected and set to be symmetrically distributed.
[0085] Please refer to Figure 3 , Figure 3A physical cross-section structure diagram of a cylinder provided by the embodiment of the present application, wherein the first air hole 141 and the second air hole 142, and the first flow channel 122 and the second flow channel 124 can be connected with external air pressure equipment through various types of joints 151, such as quick plug joints, etc., and a plurality of sealing rings can be arranged at the connection between the first cylinder cover 121, the second cylinder cover 123 and the cylinder main body 110, and a plurality of sealing rings can also be arranged at the positions where the second flow channel 124 contacts the piston shaft 132, so as to improve the air tightness of the first cavity A1 and the second cavity A2 in the cylinder main body 110.
[0086] Please refer to Figure 4 , Figure 4 A structure diagram of a control system provided by the embodiment of the present application, wherein the control system can include the controlled device 200 and the cylinder 100 described in the above embodiment. The cylinder 100 is in contact with the controlled device 200, and the second end of the piston assembly in the cylinder 100 controls the controlled device 200 based on movement.
[0087] Optionally, the controlled device 200 can be various devices controlled by contact, such as valves, switches, etc.
[0088] Since the principle of solving problems of the control system in the embodiment of the present application is similar to the above-mentioned embodiment of the cylinder, the implementation of the control system in the embodiment can refer to the description in the above-mentioned embodiment of the cylinder, and the repeated parts will not be described again.
[0089] In addition, the parts in each embodiment of the present application can be integrated together to form an independent part, or each part can exist independently, or two or more parts can be integrated to form an independent part.
[0090] The above only describes the embodiments of the present application and does not limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0091] The above only describes the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be included in the protection scope of the present application.
[0092] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the description herein. It must be stressed, however, that any combination of the components or features taught according to any aspect of the present application can be important to the working of the application.
Claims
1. A gas cylinder characterized by, The cylinder comprises a cylinder body, a cylinder head assembly and a piston assembly; The cylinder head assembly is arranged at an end of the cylinder body, a first end of the piston assembly is movably arranged inside the cylinder body, and a second end of the piston assembly passes through the cylinder head assembly; The piston assembly is provided with a buffer gas hole on the cylinder head assembly, the buffer gas hole is configured to input gas into the inside of the cylinder body or release gas in the inside of the cylinder body, and the piston assembly generates movement based on the internal pressure of the cylinder body.
2. The air cylinder of claim 1, wherein The piston assembly comprises a sliding piece and a piston shaft; A first end of the piston shaft is fixedly arranged on the sliding piece, and a second end of the piston shaft passes through the cylinder head assembly and contacts an external controlled device; The sliding piece movably adheres to the inner wall of the cylinder body, and the sliding piece is used to drive the piston shaft to move; The inside of the cylinder body is divided into a first cavity and a second cavity based on the sliding piece.
3. The air cylinder of claim 2, wherein, The cylinder head assembly comprises a first cylinder head; the buffer gas hole comprises a first gas hole arranged on the first cylinder head, and the first cylinder head is provided with a first flow channel; The first cylinder head and the sliding piece form the first cavity; The first flow channel is used to provide a gas inlet and outlet passage for the first cavity; When the sliding piece is located at a first working position close to the first cylinder head, the first end of the piston shaft adheres to the inner wall of the first flow channel, the first flow channel is closed, and the first gas hole is configured to input gas into the inside of the first cavity or release gas in the inside of the first cavity.
4. The air cylinder of claim 3, wherein Wherein, When the sliding piece is located at a non-first working position, the first flow channel is opened, and the first flow channel and the first gas hole are configured to input gas into the inside of the first cavity or release gas in the inside of the first cavity.
5. The air cylinder of claim 2, wherein Wherein, The cylinder head assembly comprises a second cylinder head; the buffer gas hole comprises a second gas hole arranged on the second cylinder head, and the second cylinder head is provided with a second flow channel; The second cylinder head and the sliding piece form the second cavity; The second end of the piston shaft passes through the second flow channel and contacts the external controlled device; The second flow channel is used to provide a gas inlet and outlet passage for the second cavity; When the sliding piece is located at a second working position close to the second cylinder head, the second end of the piston shaft adheres to the inner wall of the second flow channel, the second flow channel is closed, and the second gas hole is configured to input gas into the inside of the second cavity or release gas in the inside of the second cavity.
6. The air cylinder of claim 5, wherein, Wherein, The outer wall diameter of the second end of the piston shaft is d1, the inner wall diameter of the second flow channel is d2, and d1 When the sliding piece is located at a non-second working position, there is a gap between the second flow channel and the piston shaft; The gap and the second gas hole are configured to input gas into the inside of the second cavity or release gas in the inside of the second cavity.
7. The air cylinder of claim 6, wherein Wherein, A convex structure is arranged on the output section between the second end of the piston shaft and the sliding member, close to the position of the sliding member, an outer wall of the convex structure has a diameter d3, d1 The outer wall parameter of the convex structure is determined based on the inner wall parameter of the second flow channel; The convex structure is used to fit the inner wall of the second flow channel at the second working position.
8. The air cylinder of claim 2, wherein, In the application, The piston assembly further comprises a sealing member; A groove structure is arranged on the contact surface of the sliding member and the inner wall of the cylinder body; The sealing member is arranged in the groove structure, and the sealing member is used to isolate and seal the two ends of the sliding member.
9. The air cylinder according to any one of claims 1-8, characterized in that, In the application, The first end of the buffer gas hole is communicated with the inside of the cylinder body, and the second end of the buffer gas hole is connected with an external air pressure device; The aperture parameter between the first end of the buffer gas hole and the second end of the buffer gas hole is determined based on the structure parameter of the cylinder body, the motion parameter of the piston assembly and the vibration condition of the cylinder body.
10. A control system characterized by, The control system comprises a controlled device and the cylinder as claimed in any one of claims 1-9; The cylinder is in contactable connection with the controlled device; The second end of the piston assembly in the cylinder controls the controlled device based on movement.