Cylinder and valve

Abstract

The application provides a cylinder and a valve. The cylinder comprises a cylinder body, a piston rod, a piston body and a first partition. The cylinder body comprises a front end wall and a rear end wall. The edge of the first partition is connected to the inner wall of the cylinder body and forms a first working space with the front end wall. The first partition is provided with a first through hole and a first gas hole. The piston body comprises a sealing part and a first passing part. The sealing part is located on the side of the first partition away from the front end wall and forms a first buffer space with the first partition. The first gas hole communicates the first buffer space and the first working space. The first passing part is located on the side of the sealing part facing the first partition and is configured to limit the airflow in the first through hole by moving in the first through hole. One end of the piston rod is connected to the first passing part and the other end is located outside the cylinder body. The radial dimension of the piston rod is smaller than that of the first passing part. The cylinder is buffered and decelerated by the partition arranged in the cylinder body, thereby protecting the cylinder and the target driven by the cylinder.

Description

Technical Field

[0001] This application relates to the field of drive control technology, and more specifically, to a cylinder and a valve. Background Technology

[0002] A cylinder typically consists of a cylinder body and a piston. The piston moves linearly within the cylinder body to drive the target.

[0003] In commonly used cylinders, when the piston moves to the front or rear end of the cylinder body, it is usually stopped by the front or rear end of the cylinder body directly blocking the piston's movement. In other words, in this type of cylinder, the piston stops by impacting the front or rear end of the cylinder body.

[0004] However, this method of stopping the piston by impacting the cylinder can damage both the cylinder and the piston, thus affecting the cylinder's lifespan. Furthermore, this impact-driven stopping method also causes the target being driven by the cylinder to stop abruptly, resulting in damage to that target as well. This is especially true for valves driven by the cylinder; although the piston in the cylinder suddenly stops moving, the valve itself has inertia. Therefore, when the piston forcibly stops the valve, it will vibrate significantly, potentially damaging it. Utility Model Content

[0005] The purpose of this application is to provide a cylinder that, by providing a separator in the cylinder body, divides the internal space of the cylinder into a working space and a buffer space. When the piston body moves through the through hole, the airflow in the through hole can be restricted, thereby buffering the movement of the piston body through the airflow in the working space, so that the piston body can slowly stop, and ultimately protect the cylinder and the target driven by the cylinder.

[0006] In a first aspect, this application provides a cylinder, including a cylinder body, a piston rod, a piston body, and a first partition; the cylinder body includes a front end wall and a rear end wall; wherein the front end wall and the rear end wall are arranged along the moving direction of the piston rod; the edge of the first partition is connected to the inner wall of the cylinder body and forms a first working space with the front end wall; the first partition is provided with a first through hole and a first air hole; the piston body includes a sealing part and a first through part; wherein the sealing part is located on the side of the first partition facing away from the front end wall and forms a first buffer space with the first partition; the first air hole connects the first buffer space and the first working space; the first through part is located on the side of the sealing part facing the first partition and is configured to restrict the airflow of the first through hole by moving in the first through hole; one end of the piston rod is connected to the first through part, and the other end of the piston rod is located outside the cylinder body; wherein the radial dimension of the piston rod is smaller than the radial dimension of the first through part.

[0007] The aforementioned cylinder, by providing a first partition in the cylinder body, divides the internal space of the cylinder into a first working space and a first buffer space. When the first passage of the piston body moves in the passage hole, it can restrict the airflow in the first passage hole, thereby buffering the movement of the piston body through the airflow in the first working space, so that the piston body stops slowly, ultimately reducing damage to the cylinder and the driven target, and playing a role in protecting the cylinder and the target driven by the cylinder.

[0008] In conjunction with the first aspect, optionally, a first sealing ring is provided at the edge of the first through hole; the first sealing ring is configured to seal the first through hole and the first through portion when the first through portion moves into the first through hole.

[0009] The aforementioned cylinder, through the first sealing ring, moves the first passage part into the first passage hole and seals with it. When the first passage part reaches the first passage hole, it almost completely blocks the first passage hole, so that gas can only enter the first working space from the first buffer space through the first air hole, thereby further reducing the airflow from the first buffer space into the first working space, increasing the resistance to the piston body during movement, and thus improving the buffering effect.

[0010] In conjunction with the first aspect, optionally, the first vent is provided with a first throttling element; wherein the first throttling element is configured to regulate the flow rate through the first vent.

[0011] The aforementioned cylinder, by incorporating a first throttling element in the first air orifice, achieves adjustable airflow. This allows for convenient adjustment of the resistance applied during piston buffering by regulating the first throttling element according to actual needs. In other words, it controls the time it takes for the piston to decelerate from full speed to zero speed, thus better protecting the cylinder and the driven target.

[0012] In conjunction with the first aspect, optionally, the cylinder further includes a second partition; the edge of the second partition is connected to the inner wall of the cylinder body and forms a second working space with the rear end wall and a second buffer space with the sealing portion; the second partition is provided with a second through hole and a second air hole; wherein the second air hole connects the second buffer space and the second working space; the piston body further includes a second through portion; the second through portion is located on the side of the sealing portion facing the second partition and is configured to restrict the airflow of the second through hole by moving in the second through hole.

[0013] The aforementioned cylinder, by incorporating a second partition within its body, divides the internal space into a second working space and a second buffer space. When the piston's second passage portion moves through the through-hole, it restricts the airflow within the through-hole, thereby buffering the piston's movement through the airflow in the second working space, causing the piston to come to a slow stop. This achieves deceleration and eventual cessation of the piston's forward and backward movements through buffering. Ultimately, this further reduces damage to the cylinder and the driven target, thus protecting both the cylinder and the target it drives.

[0014] In conjunction with the first aspect, optionally, a second sealing ring is provided at the edge of the second through hole; the second sealing ring is configured to seal the connection between the second through hole and the second through portion when the second through portion moves into the second through hole.

[0015] The cylinder described above uses a second sealing ring to move the second passage part into the second passage hole and seal it with the second passage hole. When the second passage part reaches the second passage hole, it almost completely blocks the second passage hole, so that gas can only enter the second working space from the second buffer space through the second air hole. This further reduces the airflow from the second buffer space into the second working space, increases the resistance to the piston body during movement, and thus improves the buffering effect.

[0016] In conjunction with the first aspect, optionally, the second vent is provided with a second throttling element; the second throttling element is configured to regulate the flow rate through the second vent.

[0017] The aforementioned cylinder, by incorporating a second throttling element in the second air port, achieves adjustable flow rate in the second air port. This allows for convenient adjustment of the resistance applied during the piston's buffering process, based on actual needs. In other words, it regulates the time it takes for the piston to decelerate from full speed to zero. This ensures that the deceleration time during both the forward and backward movements of the piston is adjustable, thus better protecting the cylinder and the driven target.

[0018] In conjunction with the first aspect, optionally, the first separator is detachably connected to the cylinder body.

[0019] The aforementioned cylinder, through a detachable connection between the first separator and the cylinder body, allows for adjustment of the airflow size of the first air orifice by replacing the corresponding first separator when the first air orifice is not equipped with a first throttling element, even without the first air orifice being provided with a first throttling element. This is achieved by configuring multiple first separators on the cylinder, each with a different orifice diameter.

[0020] In conjunction with the first aspect, optionally, the cylinder further includes a third sealing ring; the third sealing ring provides a sealing connection between the sealing portion and the cylinder body.

[0021] The aforementioned cylinder, by employing a third sealing ring to seal the connection between the sealing part and the cylinder body, reduces gas leakage between the first buffer space and the second buffer space, thereby improving the cylinder's driving efficiency.

[0022] In conjunction with the first aspect, optionally, the cylinder block is provided with a first air port and a second air port; the first air port is connected to the first working space; and the second air port is connected to the second working space.

[0023] The aforementioned cylinder, by setting two air ports on the cylinder body, which are respectively responsible for driving the piston forward and backward, does not require a driving method that generates negative pressure through suction, compared to a single air port method. Since the driving force provided by the suction-generated negative pressure driving method is usually less than that of the air supply driving method, the driving efficiency of the cylinder is also improved.

[0024] Secondly, this application provides a valve, including a valve plate and a cylinder as described above; the cylinder is used to drive the valve plate.

[0025] The valve described above has the same beneficial effects as the cylinder described in the first aspect or any alternative embodiment of the first aspect in the process of achieving deceleration through buffering, which will not be repeated here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a first type of cylinder provided in an embodiment of this application; Figure 2 A schematic diagram of airflow in a first type of cylinder extending but not reaching the first working space, provided in an embodiment of this application; Figure 3 A schematic diagram of airflow as a first type of cylinder extends and reaches a first working space, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the structure of a second type of cylinder provided in an embodiment of this application; Figure 5 A schematic diagram of airflow in a second type of cylinder retraction but not reaching the second working space, provided in an embodiment of this application; Figure 6 A schematic diagram of airflow as a second type of cylinder retracts and reaches a second working space, provided in an embodiment of this application. Figure 7 This is a schematic diagram of the structure of a third type of cylinder provided in an embodiment of this application.

[0028] Icons: 100, Cylinder; 110, Cylinder body; 111, Front end wall; 112, Rear end wall; 113, First air port; 114, Second air port; 120, Piston rod; 130, Piston body; 131, Sealing part; 132, First passage part; 133, Second passage part; 134, Third sealing ring; 140, First separator; 141, First through hole; 142, First air hole; 143, First sealing ring; 150, Second separator; 151, Second through hole; 152, Second air hole; 153, Second sealing ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Current cylinders lack cushioning capabilities, or fail to achieve cushioning through the use of buffer pads at the front and rear ends. Cylinders without cushioning are prone to damage to the driven target. While cylinders with buffer pads offer some cushioning, the effectiveness depends heavily on the material and size of the pad, resulting in generally unsatisfactory cushioning. Furthermore, the space occupied by the buffer pad within the cylinder reduces the cylinder's stroke, thus affecting its overall applicability.

[0036] In view of this, this application provides a cylinder and a valve to solve the above-mentioned technical problems. Specifically, please refer to the embodiments and accompanying drawings provided in this application.

[0037] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the first type of cylinder 100 provided in the embodiments of this application. The cylinder 100 provided in the embodiments of this application includes a cylinder body 110, a piston rod 120, a piston body 130, and a first partition 140. The piston rod 120 and the piston body 130 together are generally a piston.

[0038] The cylinder body 110 includes a front end wall 111 and a rear end wall 112. The front end wall 111 and the rear end wall 112 are arranged along the moving direction of the piston rod 120. That is, they are the inner walls at both ends of the cylinder body 110 in the forward or backward direction of the piston.

[0039] The edge of the first partition 140 is connected to the inner wall of the cylinder body 110 and forms a first working space with the front end wall 111. The first partition 140 may be a plate-shaped piece, which is disposed inside the cylinder body 110 to divide the internal space of the cylinder body 110. Preferably, the edge of the first partition 140 is sealed to the inner wall of the cylinder body 110, for example: the edge of the first partition 140 is welded to the inner wall of the cylinder body 110, or the edge of the first partition 140 is integrally formed with the cylinder body 110.

[0040] The first partition 140 is provided with a first through hole 141 and a first vent 142. Taking the first partition 140 as a plate-shaped part as an example, the first through hole 141 and the second vent 152 can be through holes penetrating both sides of the first partition 140.

[0041] The piston body 130 includes a sealing part 131 and a first passage part 132.

[0042] The sealing portion 131 is located on the side of the first separator 140 facing away from the front end wall 111, and forms a first buffer space with the first separator 140. The edge of the sealing portion 131 slides in contact with the inner wall of the cylinder 100. The movement of the piston can be caused by a change in air pressure within the first buffer space. Preferably, the edge of the sealing portion 131 makes sealing contact with the inner wall of the cylinder 100. It should be understood that since the piston moves within the cylinder body 110, the edge of the sealing portion 131 and the inner wall of the cylinder 100 constitute a dynamic seal.

[0043] The first vent 142 connects the first buffer space and the first working space. Since the piston's movement relies on changes in air pressure within the first buffer space, any gas depleted in the first buffer space can be discharged into the first working space through the first vent 142, and then discharged from the first working space through the vent on the cylinder 110. Conversely, any gas added to the first buffer space can be gas from outside the cylinder 110 entering the first working space through the vent on the cylinder 110, and then flowing into the first working space through the first vent 142. The vent, for example, is an air pump that connects the first working space to the outside of the cylinder 110.

[0044] The first passage portion 132 is located on the side of the sealing portion 131 facing the first separator 140, and is configured to restrict airflow through the first passage hole 141 by moving within it. Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of airflow when the first type of cylinder 100 extends but does not reach the first working space, as provided in the embodiments of this application; Figure 3 This is a schematic diagram of the airflow as the first type of cylinder 100 extends and reaches the first working space according to an embodiment of this application. During the movement of the piston body 130 to the right, before the first through portion 132 reaches the first through hole 141, the gas in the first buffer space is forced into the working space by the piston body 130, and the gas enters the first working space through the first through hole 141 and the first air hole 142. When the first through portion 132 reaches the first through hole 141, the aperture of the first through hole 141 is partially or completely blocked, thereby reducing the airflow entering the first working space from the first buffer space. With the reduced airflow, the resistance to the rightward movement of the piston body 130 increases accordingly, thus providing a buffering effect. In a preferred embodiment, the aperture of the first through hole 141 is substantially equal to the radial dimension of the first through portion 132, almost completely blocking the first through hole 141. This increases the resistance to the piston body 130 and improves the buffering effect.

[0045] One end of the piston rod 120 is connected to the first passage portion 132, and the other end of the piston rod 120 is located outside the cylinder body 110. The other end of the piston can be used to connect to the target to be driven, such as a valve. The piston can drive the target by directly connecting to the target and driving the target to make linear motion, or a rack can be configured at the other end of the piston rod 120, which is connected to the gear of the target. During the driving process of the cylinder 100, the linear motion of the piston is converted into the rotational motion of the gear. The radial dimension of the piston rod 120 is smaller than the radial dimension of the first passage portion 132.

[0046] In the above implementation process, by providing a first partition 140 inside the cylinder body 110, the space inside the cylinder 100 is divided into a first working space and a first buffer space. When the first passage portion 132 of the piston body 130 moves in the passage hole, the airflow in the first passage hole 141 can be restricted. In turn, the movement of the piston body 130 can be buffered by the airflow in the first working space, so that the piston body 130 stops slowly. Ultimately, the damage to the cylinder 100 and the driven target is reduced, thus protecting the cylinder 100 and the target driven by the cylinder 100.

[0047] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the second type of cylinder 100 provided in the embodiments of this application. In some optional embodiments, a first sealing ring 143 is provided on the edge of the first through hole 141. The first sealing ring 143 is configured to seal the connection between the first through hole 141 and the first through part 132 when the first through part 132 moves into the first through hole 141.

[0048] In other words, when the first passage portion 132 moves into the first passage hole 141, the first passage portion 132 and the first passage hole 141 are sealed together by the first sealing ring 143. It should be understood that since the piston body 130 moves within the cylinder body 110 during the operation of the cylinder 100, the first passage portion 132 and the first passage hole 141 are also equivalent to a dynamic seal.

[0049] In the above-mentioned process, the first passage part 132 is moved into the first passage hole 141 by the first sealing ring 143 and is sealed to the first passage hole 141. When the first passage part 132 reaches the first passage hole 141, it almost completely blocks the first passage hole 141, so that the gas can only enter the first working space from the first buffer space through the first air hole 142, thereby further reducing the airflow from the first buffer space into the first working space, increasing the resistance to the movement of the piston body 130, and thus improving the buffering effect.

[0050] In some optional embodiments, the first vent 142 is provided with a first throttling element (not shown in the figure). The first throttling element is configured to regulate the flow rate through the first vent 142. Specifically, the first throttling element can be a throttling valve, a miniature electric needle valve, or a piezoelectric miniature flow regulating valve, etc. By controlling the first throttling element, the opening degree of the first vent 142 can be adjusted.

[0051] In the above implementation process, by providing a first throttling element in the first air port 142, the flow rate of the first air port 142 is adjustable. This allows for the adjustment of the resistance applied to the piston body 130 during the buffering process according to actual needs. In other words, it adjusts the time it takes for the piston to decelerate from full speed to zero speed, thus better protecting the cylinder 100 and the driven target.

[0052] Please continue to refer to Figure 4 In some alternative embodiments, the cylinder 100 also includes a second separator 150.

[0053] The edge of the second partition 150 is connected to the inner wall of the cylinder body 110, forming a second working space with the rear end wall 112 and a second buffer space with the sealing part 131. The second partition 150 can also be a plate-shaped piece, which, when disposed inside the cylinder body 110, can also divide the internal space of the cylinder body 110. Preferably, the edge of the second partition 150 is sealed to the inner wall of the cylinder body 110, for example: the edge of the second partition 150 is welded to the inner wall of the cylinder body 110, or the edge of the second partition 150 is integrally formed with the cylinder body 110.

[0054] The second partition 150 is provided with a second through hole 151 and a second vent 152. The second vent 152 connects the second buffer space and the second working space. Taking the second partition 150 as a plate-shaped part as an example, the second through hole 151 and the second vent 152 can be through holes penetrating both sides of the second partition 150.

[0055] The piston body 130 also includes a second passage portion 133. The second passage portion 133 is located on the side of the sealing portion 131 facing the second separator 150 and is configured to restrict airflow through the second passage hole 151 by moving within it. Figure 5 and Figure 6 As shown, Figure 5 A schematic diagram of airflow when the second type of cylinder 100 retracts but does not reach the second working space, as provided in the embodiments of this application. Figure 6This is a schematic diagram of the airflow as the second type of cylinder 100 retracts and reaches the second working space, according to an embodiment of this application. During the leftward movement of the piston body 130, before the second passage portion 133 reaches the second passage hole 151, the gas in the second buffer space is forced into the working space by the piston body 130, and the gas enters the second working space through the second passage hole 151 and the second air hole 152. When the second passage portion 133 reaches the second passage hole 151, the aperture of the second passage hole 151 is partially or completely blocked, thereby reducing the airflow entering the second working space from the second buffer space. With the reduced airflow, the resistance to the leftward movement of the piston body 130 increases accordingly, thus providing a buffering effect. In a preferred embodiment, the aperture of the second passage hole 151 is substantially equal to the radial dimension of the second passage portion 133, almost completely blocking the second passage hole 151. This increases the resistance to the piston body 130 and improves the buffering effect.

[0056] In the above implementation process, by providing a second partition 150 inside the cylinder body 110, the internal space of the cylinder 100 is divided into a second working space and a second buffer space. When the second passage portion 133 of the piston body 130 moves in the passage hole, the airflow in the second passage hole 151 can be restricted. This allows the airflow in the second working space to buffer the movement of the piston body 130, causing it to stop slowly. This achieves deceleration and eventual stop of the piston during both its forward and backward movements. Ultimately, this further reduces damage to the cylinder 100 and the driven target, further protecting the cylinder 100 and the target driven by the cylinder 100.

[0057] Please continue to refer to Figure 4 In some alternative embodiments, a second sealing ring 153 is provided at the edge of the second through hole 151. The second sealing ring 153 is configured to seal the connection between the second through hole 151 and the second through portion 133 when the second through portion 133 moves into the second through hole 151.

[0058] In other words, when the second passage portion 133 moves into the second passage hole 151, the second passage portion 133 and the second passage hole 151 are sealed together by the second sealing ring 153. It should be understood that since the piston body 130 moves within the cylinder body 110 during the operation of the cylinder 100, the second passage portion 133 and the second passage hole 151 also function as a dynamic seal.

[0059] In the above-mentioned process, the second passage part 133 is moved into the second passage hole 151 by the second sealing ring 153 and is sealed to the second passage hole 151. When the second passage part 133 reaches the second passage hole 151, it almost completely blocks the second passage hole 151, so that the gas can only enter the second working space from the second buffer space through the second air hole 152, thereby further reducing the airflow from the second buffer space into the second working space, increasing the resistance to the movement of the piston body 130, and thus improving the buffering effect.

[0060] In some alternative embodiments, the second vent 152 is provided with a second throttling element (not shown in the figure). The second throttling element is configured to regulate the flow rate through the second vent 152. Specifically, the second throttling element can also be a throttling valve, a miniature electric needle valve, or a piezoelectric miniature flow regulating valve, etc. By controlling the second throttling element, the opening degree of the second vent 152 can be adjusted.

[0061] In the above implementation process, by setting a second throttling element in the second air port 152, the flow rate of the second air port 152 is adjustable. This allows for adjustment of the resistance applied to the piston body 130 during the buffering process according to actual needs. In other words, it adjusts the time it takes for the piston to decelerate from full speed to zero speed. This makes the deceleration time adjustable during both the forward and backward movements of the piston, thus better protecting the cylinder 100 and the driven target.

[0062] In some alternative embodiments, the first partition 140 is detachably connected to the cylinder body 110. The detachable connection can be achieved through snap-fit ​​or flange connection, etc. For example, an annular groove is provided at a corresponding position on the inner wall of the cylinder body 110, and a boss is provided on the outer edge of the first partition 140. After the boss is engaged in the annular groove, it is axially limited by a shaft elastic retaining ring.

[0063] It is worth mentioning that, in order to facilitate the disassembly and assembly of the piston and cylinder 110, the second separator 150 is usually detachably connected to the cylinder 110. Therefore, the detachable connection between the second separator 150 and the cylinder 110 can be the same as that between the first separator 140.

[0064] In the above implementation process, through the detachable connection between the first separator 140 and the cylinder body 110, when the first air hole 142 is not provided with a first throttling element, by configuring multiple first separators 140 on the cylinder 100, and the diameter of the first air hole 142 on each first separator 140 is different, it is possible to adjust the airflow size of the first air hole 142 by replacing the corresponding first separator 140.

[0065] Please continue to refer to Figure 4In some optional embodiments, the cylinder 100 further includes a third sealing ring 134. The third sealing ring 134 seals the sealing portion 131 and the cylinder body 110. Specifically, the edge of the sealing portion 131 is provided with an annular groove for receiving the third sealing ring 134. By installing the third sealing ring 134 into the annular groove, a sealing connection with the inner wall of the cylinder body 110 can be achieved.

[0066] In the above implementation process, by using a third sealing ring 134 to seal the connection between the sealing part 131 and the cylinder body 110, the gas leakage between the first buffer space and the second buffer space is reduced, thereby improving the driving efficiency of the cylinder 100.

[0067] Please refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the third type of cylinder 100 provided in this application embodiment. In some optional embodiments, the cylinder body 110 is provided with a first air port 113 and a second air port 114. The first air port 113 communicates with a first working space and can be specifically disposed on the front end wall 111. The second air port 114 communicates with a second working space and can be specifically disposed on the rear end wall 112.

[0068] The first air port 113 and the second air port 114 can each be used to connect an external air pump. Figure 7 For example, during the process of piston body 130 moving to the left, gas can be injected into the second working space through an air pump connected to the second air port 114 to drive piston body 130. During the process of piston body 130 moving to the right, gas can be injected into the first working space through an air pump connected to the first air port 113 to drive piston body 130.

[0069] In the above implementation process, by setting two air ports on the cylinder body 110, which are respectively responsible for driving the piston forward and backward, compared with the single air port method, there is no need for the driving method of generating negative pressure by suction. Since the driving force provided by the driving method of generating negative pressure by suction is usually less than that of the air supply driving method, the driving efficiency of the cylinder 100 is also improved.

[0070] Based on the same concept, embodiments of this application provide a valve, including a valve plate and the cylinder 100 described above. The cylinder 100 is used to drive the valve plate.

[0071] The valve may also include a valve body, on which a valve port is provided. The valve plate moves to block the valve port, thereby closing the valve. Furthermore, the movement of the valve can be driven by a cylinder 100.

[0072] The above implementation process is the same as the buffer deceleration process of cylinder 100 described above, and will not be repeated here.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cylinder, characterized in that, Includes cylinder block, piston rod, piston body, and first separator; The cylinder body includes a front end wall and a rear end wall; wherein the front end wall and the rear end wall are arranged along the moving direction of the piston rod; The edge of the first separator is connected to the inner wall of the cylinder and forms a first working space with the front end wall; The first separator is provided with a first through hole and a first air hole; The piston body includes a sealing part and a first passage part; The sealing portion is located on the side of the first partition facing away from the front end wall and forms a first buffer space with the first partition; the first air hole connects the first buffer space and the first working space; the first passage portion is located on the side of the sealing portion facing the first partition and is configured to restrict the airflow of the first passage hole by moving in the first passage hole; One end of the piston rod is connected to the first passage, and the other end of the piston rod is located outside the cylinder body; wherein the radial dimension of the piston rod is smaller than the radial dimension of the first passage.

2. The cylinder according to claim 1, characterized in that, A first sealing ring is provided at the edge of the first through hole; The first sealing ring is configured to seal the connection between the first through hole and the first through portion when the first through portion moves into the first through hole.

3. The cylinder according to claim 1, characterized in that, The first vent is provided with a first throttling element; The first throttling element is configured to regulate the flow rate through the first air hole.

4. The cylinder according to claim 1, characterized in that, The cylinder also includes a second separator; The edge of the second separator is connected to the inner wall of the cylinder, and forms a second working space with the rear end wall and a second buffer space with the sealing part; The second partition is provided with a second through hole and a second air hole; wherein, the second air hole connects the second buffer space and the second working space; The piston body further includes a second passage portion; the second passage portion is located on the side of the sealing portion facing the second separator and is configured to restrict airflow through the second passage hole by moving within the second passage hole.

5. The cylinder according to claim 4, characterized in that, A second sealing ring is provided at the edge of the second through hole; The second sealing ring is configured to seal the connection between the second through hole and the second through portion when the second through portion moves into the second through hole.

6. The cylinder according to claim 4, characterized in that, The second vent is provided with a second throttling element; The second throttling element is configured to regulate the flow rate through the second air hole.

7. The cylinder according to any one of claims 4 to 6, characterized in that, The first separator is detachably connected to the cylinder body.

8. The cylinder according to any one of claims 4 to 6, characterized in that, The cylinder also includes a third sealing ring; the third sealing ring provides a sealing connection between the sealing part and the cylinder body.

9. The cylinder according to any one of claims 4 to 6, characterized in that, The cylinder body is provided with a first air port and a second air port; The first air inlet is connected to the first working space; The second air inlet is connected to the second working space.

10. A valve, characterized in that, Includes a valve plate and a cylinder as described in any one of claims 1 to 6; The cylinder is used to drive the valve plate.

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