Cylinder and driving device

Abstract

The utility model provides an air cylinder and a driving device, and relates to the technical field of driving control. The air cylinder comprises a piston piece, a moving piece, a shell, an air hole structure and a driving piece. The piston piece comprises a table-board structure and a fixed shaft; the first end of the fixed shaft is fixedly connected with the table-board structure, and the second end of the fixed shaft is fixed in the shell; the moving part is movably arranged between the piston part and the shell; the first surface, deviating from the fixed shaft, of the table-board structure and the moving part form a first cavity, the moving part and the second surface of the table-board structure form a second cavity, and the moving part and the fixed surface, close to the fixed shaft, of the shell form a third cavity; the air hole structure is arranged on the moving part and communicates with the first cavity, the second cavity and the third cavity. The air hole structure is configured to input air into the cavity or discharge air in the cavity; the driving part is arranged outside the cavities and connected with the moving part, and the moving part is configured to generate movement in the extending direction of the fixed shaft based on pressure changes in the multiple cavities and drive the driving part to move.

Description

Technical Field

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

[0002] Cylinders, as a common drive structure, are widely used in various industries and types of equipment. While there are many different types of cylinders, their main structural principles are largely the same, and they are relatively simple to use in practice.

[0003] In practical applications, various devices, such as valves, have different requirements for cylinders. In some scenarios, the requirements for cylinder structure and size are quite stringent, and the cylinder is required to output a large force within a limited space. In existing cylinder structures, the output force of the cylinder is limited by the cylinder size, which means that smaller cylinders cannot output the force required by the scenario, thus making it impossible for the cylinder to meet current drive requirements. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a cylinder and a drive device to improve the problem that small-sized cylinders in the prior art cannot output large driving force.

[0005] To address the aforementioned issues, in a first aspect, embodiments of this application provide a cylinder, which includes: a piston, a moving part, a housing, a vent structure, and a driving part;

[0006] The piston assembly includes a platform structure and a fixed shaft; a first end of the fixed shaft is fixedly connected to the platform structure, and a second end of the fixed shaft is fixed in the housing; the movable component is movably disposed between the piston assembly and the housing.

[0007] Wherein, the first surface of the platform structure facing away from the fixed axis forms a first cavity with the moving member, the moving member forms a second cavity with the second surface of the platform structure, and the moving member forms a third cavity with the fixed surface of the housing near the fixed axis;

[0008] The vent structure is disposed on the movable part and communicates with the first cavity, the second cavity, and the third cavity; the vent structure is configured to input gas into the cavity or release gas inside the cavity;

[0009] The driving component is disposed outside the cavity and connected to the moving component. The moving component is configured to move in the direction of the fixed shaft extension based on pressure changes within the multiple cavities, and drive the driving component to move.

[0010] In the above implementation process, a piston, a moving component, and a housing constitute three cavities. Gas is introduced into or released from the cavities through vent structures connected to them, thereby changing the pressure within the multiple cavities. This pressure change generates movement along the extension direction of the piston's internal fixed axis, driving the connected moving component. Since the moving component is also connected to a drive component outside the cavities, its movement also drives the drive component, achieving the driving function. Within a limited cylinder size range, a compact multi-layer cylinder is formed by multiple cavities, effectively increasing the driving force when the drive component is driven. This makes it suitable for various driving scenarios with limited cylinder size and meets diverse driving requirements.

[0011] Optionally, the pore structure includes: a first type of pore and a second type of pore;

[0012] The first type of pore is connected to the first cavity;

[0013] The second type of pore is connected to the second cavity.

[0014] In the above implementation process, in order to realize the driving function in two reciprocating directions, the vent structure can include independent first type vents and second type vents. The two types of vents are connected to the first cavity and the second cavity respectively to provide gas transmission channels for the first cavity and the second cavity respectively. Based on the first cavity and the second cavity, the reciprocating movement in two directions can be realized respectively, so as to realize automatic reset after the driving trigger function is completed.

[0015] Optionally, when the first cavity is inlet with air through the first type of vent, the moving member moves in a first direction based on the pressure change of the first cavity, and drives the driving member to move in the first direction; wherein the first direction is the direction away from the fixed axis.

[0016] In the above implementation process, when the first cavity takes in air through the first type of air hole, the pressure of the first cavity changes based on the air intake situation, and the volume of the first cavity increases and expands. Since the first cavity is formed by the first surface of the platform structure and the moving part, and the platform structure is fixed, the volume change of the first cavity can drive the movable moving part to move in a first direction away from the fixed axis, and drive the driving part to move in the first direction, thereby realizing the driving function in the first direction.

[0017] Optionally, the piston component is provided with a through hole, the through hole connecting the first cavity and the third cavity;

[0018] When the first cavity is inlet air through the first type of vent, the third cavity is inlet air through the through hole; the moving member is configured to move in the first direction based on the pressure change of the third cavity, and drive the driving member to move in the first direction.

[0019] In the above implementation process, the piston component is provided with a through hole. The first cavity and the third cavity can be interconnected based on the through hole. Therefore, when the first cavity receives air through the first type of air hole, the third cavity can also receive air through the through hole due to the air passage function. This allows the third cavity to generate pressure changes based on the air intake, causing its volume to increase and expand. Since the third cavity is formed by the fixed surface of the moving component and the housing, and the housing is fixed, the volume change of the first cavity can drive the movable component to move in a first direction away from the fixed axis, and drive the driving component to move in the first direction, thus realizing the driving function in the first direction. Through the arrangement and interconnection structure of the first cavity and the third cavity, two driving forces in the first direction can be provided to the moving component when air is intake in the first cavity, effectively improving the driving force of the driving component in the first direction. This is suitable for various small-sized but high-output-force driving scenarios.

[0020] Optionally, the platform structure is fixed to the fixed shaft by a perforated connector;

[0021] The first end of the through hole is disposed on the first surface of the table structure, and the second end of the through hole is disposed at the second end of the fixed shaft.

[0022] In the above implementation process, the platform structure is fixed to the fixed shaft by a perforated connector. The first end of the through hole is located on the first surface of the platform structure, and the second end is located at the second end of the fixed shaft, so that the through hole can properly connect the first cavity and the third cavity without adversely affecting the intermediate second cavity. Placing the through hole in the piston component to connect the first cavity and the third cavity effectively reduces the complexity of the structure and the cost of the components.

[0023] Optionally, when the second cavity is inlet air through the second type of air hole, the moving member is configured to move in a second direction based on the pressure change of the second cavity, and drive the driving member to move in the second direction; wherein the second direction is the direction pointing to the second end of the fixed shaft.

[0024] In the above implementation process, when the second cavity takes in air through the second type of air hole, the pressure of the second cavity changes based on the air intake situation, and the volume of the second cavity increases and expands. Since the second cavity is formed by the second surface of the platform structure and the moving part, and the platform structure is fixed, the volume change of the second cavity can drive the movable moving part to move in the second direction pointing to the second end of the fixed shaft, and drive the driving part to move in the second direction, thereby realizing the driving function in the second direction.

[0025] Optionally, the first type of vent and the second type of vent are connected to an external pneumatic device;

[0026] The gas transport direction in the first type of pore is opposite to the gas transport direction in the second type of pore.

[0027] In the above implementation process, both types of vents in the vent structure are connected to external pneumatic equipment to change the pressure within their respective chambers based on the operation of the pneumatic equipment. Furthermore, to achieve normal movement, the pressure conditions between multiple chambers are interconnected. Therefore, the gas transmission directions of the two types of vents are opposite to prevent adverse effects between the chambers, effectively reducing issues such as stagnation or inability to move, and improving the smoothness of the cylinder's driving function.

[0028] Optionally, the cylinder further includes: a first seal and a second seal;

[0029] The first seal is disposed between the platform structure and the movable member, and the first seal is used to isolate the first cavity and the second cavity;

[0030] The second seal is disposed between the movable member and the housing, and the second seal is used to isolate the third cavity from the internal space of the housing.

[0031] In the above implementation process, in order to ensure the airtightness of each cavity, the cylinder may also include a first sealing element disposed between the platform structure and the moving part, and a second sealing element disposed between the moving part and the housing. The first sealing element can isolate the first cavity and the second cavity with opposite driving directions, and seal the first cavity and the second cavity to reduce abnormal situations caused by the conduction between the first cavity and the second cavity. The third sealing element can also isolate the third cavity from the internal space of the housing, and seal the third cavity to reduce abnormal situations caused by the conduction between the internal space of the housing and the third cavity.

[0032] Optionally, the cylinder further includes: a first guide member and a second guide member;

[0033] The first guide member is disposed between the platform structure and the movable member, and the second guide member is disposed between the fixed shaft and the movable member;

[0034] The first guide and the second guide are used to limit the direction of movement of the moving member.

[0035] In the above implementation process, considering the mutual movement between multiple structures, in order to reduce the friction between the mutual movements and restrict the movement direction of the moving parts, the cylinder may also include a first guide member disposed between the platform structure and the moving parts and a second guide member disposed between the fixed shaft and the moving parts. The movement direction of the moving parts can be restricted by the two guide members, effectively reducing the adverse situation of deviation in the movement direction of the moving parts. The two guide members can also reduce the friction between the moving parts and other parts, effectively improving the service life of the cylinder.

[0036] Secondly, embodiments of this application also provide a driving device, the driving device comprising the cylinder described in any one of the first aspects above.

[0037] In summary, the embodiments of this application provide a cylinder and a driving device. Within a limited cylinder size range, a multi-layer cylinder with a compact structure is formed by multiple cavities, which effectively improves the driving force when the driving component is driven. It is applicable to a variety of driving scenarios that limit cylinder size and meets a variety of driving requirements. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application 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.

[0039] Figure 1 This is a schematic diagram of the cross-sectional structure of a cylinder provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the cross-sectional structure of another cylinder provided in an embodiment of this application.

[0041] Icons: 100-Piston component; 200-Moving component; 300-Housing housing; 210-Air hole structure; 400-Drive component; 110-Table structure; 120-Fixed shaft; A1-First cavity; A2-Second cavity; A3-Third cavity; 211-First type of air hole; 212-Second type of air hole; F1-First direction; 130-Through hole; 131-Drilled connector; F2-Second direction; 511-First seal; 512-Second seal; 521-First guide; 522-Second guide. Detailed Implementation

[0042] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0043] In practical applications, various devices, such as valves, have different requirements for cylinders. In some scenarios, the requirements for cylinder structure and size are quite stringent, and the cylinder is required to output a large force within a limited space. For example, in some valve driving scenarios, in order to improve the efficiency of material transfer, the space reserved for the cylinder that drives the valve is very small. In the existing cylinder structure, the output force of the cylinder is limited by the cylinder size, which means that smaller cylinders cannot output the force required by the scenario, and thus the cylinder cannot meet the current driving requirements.

[0044] To address the aforementioned issues, this application provides a cylinder and a driving device. Within a limited cylinder size range, a multi-layer cylinder with a compact structure is formed by multiple cavities, effectively improving the driving force when the driving component 400 is driven. This is applicable to various driving scenarios that limit cylinder size and meets diverse driving requirements.

[0045] Please see Figure 1 , Figure 1 This is a cross-sectional structural diagram of a cylinder provided in an embodiment of the present application. The cylinder may include: a piston 100, a moving part 200, a housing 300, a vent structure 210, and a driving part 400.

[0046] The piston component 100 may include a platform structure 110 and a fixed shaft 120. The platform structure 110 may be a planar structure of various shapes, such as a circular platform or a directional platform. The planar shape of the platform structure 110 matches the inner wall of the housing 300, so that multiple cavities can be isolated in the housing 300 through the platform structure 110. The fixed shaft 120 may be a shaft structure of various shapes, such as a cylindrical shaft or a columnar shaft. The first end of the fixed shaft 120 is fixedly connected to the platform structure 110. The platform structure 110 may be fixed to the first end of the fixed shaft 120 by welding, screws or other connecting parts. The second end of the fixed shaft 120 is fixed in the housing 300. A corresponding fixed platform may be provided on the fixed surface of the housing 300 opposite to the platform structure 110. The second end of the fixed shaft 120 may also be fixed to the fixed platform by welding, screws or other connecting parts to improve the stability of the entire piston component 100.

[0047] It should be noted that the movable part 200 is movably disposed between the piston part 100 and the housing 300. Since the piston part 100 is a table-shaped structure, the movable part 200 can be configured as a table-shaped structure with the inner wall attached to the piston part 100 and an irregular shape with the outer wall attached to the housing 300.

[0048] Since the inner wall shape of the internal space formed by the platform structure 110 and the housing 300 fits together, a first cavity A1 is formed between the first surface of the platform structure 110 away from the fixed shaft 120 and the moving member 200, and a second cavity A2 is formed between the moving member 200 and the second surface of the platform structure 110 (i.e. the opposite surface of the first surface). In order to give the moving member 200 sufficient movement space, there is a corresponding movement space between the outer wall of the moving member 200 and the housing 300. Therefore, a third cavity A3 can be formed between the moving member 200 and the fixed surface of the housing 300 near the fixed shaft 120.

[0049] Optionally, the vent structure 210 is disposed on the movable member 200 and communicates with the first cavity A1, the second cavity A2, and the third cavity A3. The vent structure 210 is configured to input gas into the cavity or release gas inside the cavity. The driving member 400 is disposed outside the cavity. The driving member 400 can be disposed outside or inside the housing 300. The driving member 400 can be configured as a corresponding driving shaft, driving rod, or other structure. The driving member 400 can be connected to the movable member 200 by welding, screws, or other means. The movable member 200 is configured to move in the extension direction of the fixed shaft 120 based on the pressure changes in the multiple cavities, and drive the driving member 400 to move.

[0050] For example, the vent structure 210 can be a corresponding circular vent channel or other structure. The vent structure 210 can be set through the moving part 200. The housing 300 can also be provided with a corresponding groove structure to accommodate the vent structure 210. The vent structure 210 can include multiple different types of vents, which are respectively connected to the first cavity A1, the second cavity A2 and the third cavity A3 to provide air inlet and outlet channels for the interior of the multiple cavities.

[0051] It should be noted that parts such as piston 100, moving part 200, housing 300, and drive part 400 can be made of materials with good wear resistance and lubricity, such as hard alloys like tungsten carbide or alloys with a chromium plating. When designing multiple parts, the dimensional tolerances between each part can be reduced to improve the uniformity of force distribution on moving part 200 and drive part 400.

[0052] exist Figure 1 In the illustrated embodiment, a piston 100, a moving member 200, and a housing 300 constitute three cavities. Gas is introduced into or released from the cavities through a vent structure 210 connected to the cavities, thereby changing the pressure within the multiple cavities. This pressure change generates movement along the extension direction of the fixed shaft 120 inside the piston 100, driving the connected moving member 200 to move. Since the moving member 200 is also connected to a drive member 400 outside the cavities, its movement also drives the drive member 400 to move, thus achieving the driving function. Within a limited cylinder size range, the multiple cavities form a compact, multi-layered cylinder, effectively increasing the driving force when the drive member 400 is driven. This is suitable for various driving scenarios where cylinder size is limited, meeting diverse driving requirements.

[0053] Please see Figure 2 , Figure 2 This is a schematic diagram of the cross-sectional structure of another cylinder provided in an embodiment of this application, wherein the air hole structure 210 may include: a first type of air hole 211 and a second type of air hole 212.

[0054] It should be noted that the first type of vent 211 is connected to the first cavity A1, and the second type of vent 212 is connected to the second cavity A2. In order to realize the driving function in both reciprocating directions, the vent structure 210 may include independent first type of vent 211 and second type of vent 212. The two types of vents are respectively connected to the first cavity A1 and the second cavity A2 to provide gas transmission channels for the first cavity A1 and the second cavity A2, respectively. Based on the first cavity A1 and the second cavity A2, the reciprocating movement in both directions can be realized respectively, so as to achieve automatic reset after the driving trigger function is completed.

[0055] Optionally, the positions and channel routing of the first type of vent 211 and the second type of vent 212 on the moving part 200 can be set according to the actual situation.

[0056] It should be noted that when air enters the first cavity A1 through the first type of air hole 211, the movable component 200 moves in the first direction F1 based on the pressure change in the first cavity A1, and drives the driving component 400 to move in the first direction F1; wherein, the first direction F1 is the direction away from the fixed axis 120. When air enters the first cavity A1 through the first type of air hole 211, the pressure change in the first cavity A1 based on the air intake situation causes the volume inside the first cavity A1 to increase and expand. Since the first cavity A1 is formed by the first surface of the platform structure 110 and the movable component 200, and the platform structure 110 is fixed, the volume change of the first cavity A1 can drive the movable component 200 to move in the first direction F1 away from the fixed axis 120, and drive the driving component 400 to move in the first direction F1, realizing the driving function in the first direction F1.

[0057] Optionally, to increase the driving force in the first direction F1, the piston 100 may be provided with a through hole 130, which connects the first cavity A1 and the third cavity A3. When the first cavity A1 is filled with air through the first type of air hole 211, the third cavity A3 is filled with air through the through hole 130; the moving member 200 is configured to move in the first direction F1 based on the pressure change in the third cavity A3, and drive the driving member 400 to move in the first direction F1. The piston component 100 is provided with a through hole 130. The first cavity A1 and the third cavity A3 can be interconnected based on the through hole 130. Therefore, when the first cavity A1 is filled with air through the first type of air hole 211, the third cavity A3 can also be filled with air through the through hole 130 due to the ventilation function of the through hole 130. This allows the third cavity A3 to generate pressure changes based on the air intake situation, and the volume inside the third cavity A3 increases and expands. Since the third cavity A3 is formed by the moving part 200 and the fixed surface of the housing 300, and the housing 300 is fixed, the volume change of the first cavity A1 can drive the movable moving part 200 to move in the first direction F1 away from the fixed axis 120, and drive the driving part 400 to move in the first direction F1, thereby realizing the driving function in the first direction F1. By setting and connecting the first cavity A1 and the third cavity A3, two driving forces in the first direction F1 can be provided to the moving part 200 when the first cavity A1 is inlet, which effectively improves the driving force of the driving part 400 in the first direction F1. This is suitable for various small-sized driving scenarios with large output force requirements.

[0058] It should be noted that the force-bearing area of ​​the movable part 200 in the first cavity A1 is the area of ​​the top cover corresponding to the first surface of the movable part 200 and the platform structure 110. The top cover of the movable part 200 can be set as a detachable structure to facilitate the assembly of multiple parts. The top cover can be connected to the bottom of the movable part 200 by means of buckles, screws, welding, etc., and a corresponding sealing ring or other structure is set for sealing treatment. In the third cavity A3, since the fixed shaft 120 is fixed on the fixed surface of the housing 300, the force-bearing area of ​​the movable part 200 in the third cavity A3 is the fixed surface minus the area of ​​the middle fixed shaft 120. Under the condition that the piston part 100 is fixed and stable, the fixed area of ​​the second end of the fixed shaft 120 can be reduced as much as possible, or the area of ​​the fixed surface of the housing 300 can be increased to increase the force-bearing area of ​​the movable part 200 in the third cavity A3, and further increase the force value of the driving force F1 applied by the third cavity A3 to the movable part 200 in the first direction.

[0059] Optionally, the platform structure 110 can be fixed to the fixed shaft 120 via a drilled connector 131. The drilled connector 131 can be a connector with a hole structure, such as a drilled screw. Based on the connection of the drilled connector 131, the first end of the through hole 130 is located on the first surface of the platform structure 110, and the second end of the through hole 130 is located at the second end of the fixed shaft 120, so that the through hole 130 can normally connect the first cavity A1 and the third cavity A3 without adversely affecting the intermediate second cavity A2. Setting the through hole 130 in the piston component 100 to connect the first cavity A1 and the third cavity A3 effectively reduces the complexity of the structure and the cost of the components.

[0060] It should be noted that in some valve control drive scenarios, considering the sealing characteristics of valve closure, the driving force in the direction of the valve, i.e., the first direction F1, is required to be relatively high, while the driving force in the opposite direction of the first direction F1, i.e., the second direction F2, is required to be relatively low. Therefore, only one driving force is needed to complete the driving function of the second direction F2. When the second cavity A2 is inlet through the second type of air hole 212, the moving part 200 is configured to move in the second direction F2 based on the pressure change of the second cavity A2, and drive the driving part 400 to move in the second direction F2; wherein, the second direction F2 is the direction pointing to the second end of the fixed shaft 120. When air enters the second cavity A2 through the second type of air hole 212, the pressure in the second cavity A2 changes based on the air intake situation, and the volume inside the second cavity A2 increases and expands. Since the second cavity A2 is formed by the second surface of the platform structure 110 and the moving member 200, and the platform structure 110 is fixed, the volume change of the second cavity A2 can drive the movable moving member 200 to move in the second direction F2 pointing to the second end of the fixed shaft 120, and drive the driving member 400 to move in the second direction F2, thereby realizing the driving function in the second direction F2.

[0061] Optionally, the first type of air vent 211 and the second type of air vent 212 are connected to an external pneumatic device to change the pressure within their respective cavities based on the operation of the pneumatic device. Furthermore, to achieve normal movement, the pressure conditions between the multiple cavities are interconnected. Therefore, the gas transmission direction in the first type of air vent 211 is opposite to that in the second type of air vent 212, preventing adverse effects between the cavities and effectively reducing issues such as the moving part 200 stalling or being unable to move, thus improving the smoothness of the cylinder's driving function.

[0062] For example, when the gas transmission direction of the first type of vent 211 is the inlet direction, the first cavity A1 and the third cavity A3 receive gas, the gas transmission direction of the second type of vent 212 is the outlet direction, and the second cavity A2 discharges gas; when the gas transmission direction of the second type of vent 212 is the inlet direction, the second cavity A2 receives gas, the gas transmission direction of the first type of vent 211 is the outlet direction, and the first cavity A1 and the third cavity A3 discharge gas, so that the multiple cavities can generate normal air pressure changes, thereby enabling the moving part 200 to be driven normally.

[0063] It should be noted that the air inlet / outlet speeds of the first type of air vent 211 and the second type of air vent 212 can be set and adjusted according to the force-bearing area and actual space in multiple cavities.

[0064] Optionally, to ensure the airtightness of each cavity, the cylinder may further include a first seal 511 and a second seal 512. The first seal 511 is disposed between the platform structure 110 and the moving member 200, and is used to isolate the first cavity A1 and the second cavity A2. The second seal 512 is disposed between the moving member 200 and the housing 300, and is used to isolate the third cavity A3 from the internal space of the housing 300. The first seal 511 can isolate the first cavity A1 and the second cavity A2, which have opposite driving directions, and seal the first cavity A1 and the second cavity A2 to reduce abnormalities caused by communication between the first cavity A1 and the second cavity A2. The third seal can also isolate the third cavity A3 from the internal space of the housing 300, and seal the third cavity A3 to reduce abnormalities caused by communication between the internal space of the housing 300 and the third cavity A3.

[0065] For example, a first groove may be provided on the contact surface of the table structure 110 near the moving member 200 to accommodate the first seal 511, and a second groove may be provided on the contact surface of the moving member 200 near the housing 300 to accommodate the second seal 512.

[0066] For example, in order to further improve the sealing effect of the two seals, the first seal 511 and the second seal 512 can be set as Z-shaped seals with self-sealing effect, such as Z-shaped sealing rings made of rubber material, which can effectively reduce friction during movement and optimize the sealing effect through their own deformation.

[0067] Optionally, considering the mutual movement between multiple structures, and to reduce friction during mutual movement and restrict the movement direction of the moving part 200, the cylinder may further include a first guide 521 and a second guide 522. The first guide 521 is disposed between the platform structure 110 and the moving part 200, and the second guide 522 is disposed between the fixed shaft 120 and the moving part 200. The first guide 521 and the second guide 522 are used to restrict the movement direction of the moving part 200. By restricting the movement direction of the moving part 200 through the two guides, the adverse effects of deviation in the movement direction of the moving part 200 are effectively reduced. Furthermore, the two guides reduce friction between the moving part 200 and other parts, effectively improving the service life of the cylinder.

[0068] Optionally, the first guide member 521 can be configured as a corresponding annular structure according to the planar shape of the platform structure 110. For example, when the platform structure 110 is a circular platform, the first guide member 521 can be configured as an annular structure. The second guide member 522 can be configured as a corresponding annular structure according to the outer wall shape of the fixed shaft 120. For example, when the fixed shaft 120 is a cylindrical shaft, the second guide member 522 can be configured as an annular structure. Furthermore, in order to further isolate the third cavity A3 and the second cavity A2, a corresponding third sealing member can also be provided at the contact position between the moving member 200 and the second guide member 522.

[0069] Optionally, the first guide 521 and the second guide 522 can be made of corresponding wear-resistant materials, such as stainless steel, hard alloy, ceramic materials or metal materials with wear-resistant coatings, etc.

[0070] For example, a corresponding third groove may be provided on the contact surface of the platform structure 110 near the moving member 200 to accommodate the first guide member 521, and a corresponding second groove may be provided on the contact surface of the moving member 200 near the fixed shaft 120 to accommodate the second guide member 522.

[0071] This application also provides a driving device, which may include one or more cylinders as described in the above embodiments.

[0072] Optionally, in the case where the drive device has multiple cylinders, in order to achieve the linkage control of multiple cylinders, the moving parts of the multiple cylinders can be fixedly connected, or a single integral moving part can be directly connected to the interior of the multiple cylinders, so that the multiple cylinders can perform unified linkage control of the drive component.

[0073] Since the principle of the driving device in this embodiment is similar to that of the aforementioned cylinder embodiment, the implementation of the driving device in this embodiment can refer to the description in the above-mentioned cylinder embodiment, and the repeated parts will not be described again.

[0074] In addition, the components in the various embodiments of this application can be integrated together to form an independent part, or each component can exist independently, or two or more components can be integrated to form an independent part.

[0075] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of 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 scope of protection of this application. It should be noted that similar reference numerals 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.

[0076] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes said element.

Claims

1. A gas cylinder characterized by, The cylinder comprises a piston, a moving part, a shell, a gas hole structure and a driving part; The piston comprises a mesa structure and a fixed shaft; the first end of the fixed shaft is fixedly connected with the mesa structure, and the second end of the fixed shaft is fixed in the shell; the moving part is movably arranged between the piston and the shell; The first surface of the mesa structure away from the fixed shaft forms a first cavity with the moving part, the second surface of the mesa structure forms a second cavity with the moving part, and the fixed surface of the moving part close to the fixed shaft forms a third cavity with the shell; The gas hole structure is arranged on the moving part and communicates with the first cavity, the second cavity and the third cavity; the gas hole structure is configured to input gas into the cavities or discharge gas in the cavities; The driving part is arranged outside the cavities and connected with the moving part; the moving part is configured to generate movement of the fixed shaft in the extension direction based on pressure changes in the cavities and drive the driving part to move.

2. The air cylinder of claim 1, wherein The gas hole structure comprises first gas holes and second gas holes; The first gas holes are connected with the first cavity; The second gas holes are connected with the second cavity. In the case that the first cavity inputs gas through the first gas holes, the moving part moves in a first direction based on pressure changes in the first cavity and drives the driving part to move in the first direction; the first direction is a direction away from the fixed shaft.

3. The air cylinder of claim 2, wherein, The piston is provided with a through hole which communicates the first cavity and the third cavity; In the case that the first cavity inputs gas through the first gas holes, the third cavity inputs gas through the through hole; the moving part is configured to move in the first direction based on pressure changes in the third cavity and drive the driving part to move in the first direction.

4. The air cylinder of claim 3, wherein The mesa structure is fixed on the fixed shaft through a punching connector; The first end of the through hole is arranged on the first surface of the mesa structure, and the second end of the through hole is arranged at the second end of the fixed shaft. In the case that the second cavity inputs gas through the second gas holes, the moving part is configured to move in a second direction based on pressure changes in the second cavity and drive the driving part to move in the second direction; the second direction is a direction pointing to the second end of the fixed shaft.

5. The air cylinder of claim 4, wherein, The first gas holes and the second gas holes are connected with external gas pressure equipment; The gas transmission direction of the first gas holes is opposite to the gas transmission direction of the second gas holes. The cylinder further comprises a first sealing part and a second sealing part; 6. The air cylinder of claim 2, wherein The first sealing part is arranged between the mesa structure and the moving part, and is used to isolate the first cavity and the second cavity; The second sealing part is arranged between the moving part and the shell, and is used to isolate the third cavity and the internal space of the shell.

7. The air cylinder of claim 2, wherein The cylinder further comprises a first guide part and a second guide part; ​ ​ 8. The air cylinder according to any one of claims 1-7, wherein, ​ ​ ​ 9. The air cylinder according to any one of claims 1-7, wherein, ​ The first guide is arranged between the mesa structure and the moving part, and the second guide is arranged between the fixed shaft and the moving part. The first guide and the second guide are used to limit the moving direction of the moving part.

10. A drive apparatus characterized by comprising: The drive device comprises the air cylinder according to any one of claims 1-9.

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