Cylinder and driving device

Abstract

The invention 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] The present application relates to the field of drive control technology, and in particular to a cylinder and a drive device. Background Art

[0002] As a common driving structure, cylinders are widely used in various industries and equipment. There are many common types of cylinders, but the main structural principles are roughly the same, and they are also relatively simple in actual use.

[0003] In actual usage scenarios, due to the different requirements of some equipment, such as valves, on the cylinder, some scenarios have more stringent requirements on the cylinder structure, external dimensions, etc., and require the cylinder to output a larger force value within a limited space. In the existing cylinder structure, the output force value of the cylinder is limited by the cylinder size, resulting in smaller-sized cylinders being unable to output the force value required by the scene, resulting in the cylinder being unable to meet the current driving requirements. Summary of the invention

[0004] In view of this, an object of the embodiments of the present application is to provide a cylinder and a driving device to improve the problem in the prior art that a smaller-sized cylinder cannot output a larger driving force.

[0005] In order to solve the above problems, in a first aspect, an embodiment of the present application provides a cylinder, the cylinder comprising: a piston member, a moving member, a housing, a pore structure and a driving member;

[0006] The piston member comprises a table structure and a fixed shaft; a first end of the fixed shaft is fixedly connected to the table structure, and a second end of the fixed shaft is fixed in the housing; the movable member is movably disposed between the piston member and the housing;

[0007] The first surface of the table structure facing away from the fixed axis and the moving element form a first cavity, the moving element and the second surface of the table structure form a second cavity, and the moving element and the fixed surface of the housing close to the fixed axis form a third cavity;

[0008] The pore structure is disposed on the moving part and is connected to the first cavity, the second cavity, and the third cavity; the pore structure is configured to input gas into the cavity or discharge gas inside the cavity;

[0009] The driving member is arranged outside the cavity and connected to the moving member, and the moving member is configured to generate movement in the extending direction of the fixed axis based on the pressure change in the multiple cavities, and drive the driving member to move.

[0010] In the above implementation process, three cavities are formed by a piston member, a moving member and a shell. Gas is input into the cavity or released into the cavity through a pore structure connected to the cavity to change the pressure conditions in the multiple cavities. Through the pressure changes in the multiple cavities, movement is generated along the extension direction of the fixed axis in the piston member, and the connected moving member is driven to move. Since the moving member is also connected to the driving member outside the cavity, when the moving member moves, it can also drive the driving member to move to realize the driving function. Within the limited cylinder size range, a compact multi-layer cylinder is formed by multiple cavities, which effectively improves the driving force when the driving member is driven. It is suitable for a variety of driving scenarios that limit the cylinder size and meets a variety of driving needs.

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

[0012] The first type of pores are connected to the first cavity;

[0013] The second type of pores are connected to the second cavity.

[0014] In the above implementation process, in order to realize the driving function in two reciprocating directions, the pore structure may include independent first-type pores and second-type pores, and the two types of pores are respectively connected to the first cavity and the second cavity to provide gas transmission channels for the first cavity and the second cavity respectively, and can realize reciprocating movements according to the first cavity and the second cavity respectively, so as to realize automatic reset after completing the trigger function of the drive.

[0015] Optionally, when the first cavity takes in air through the first type of air holes, the movable 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 a 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 holes, the first cavity produces a pressure change based on the air intake situation, and the volume inside the first cavity increases and expands. Since the first cavity is formed by the first surface of the table structure and the movable part, and the table structure is fixed, the volume change of the first cavity can drive the movable movable part to move in the 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, a through hole is provided in the piston member, and the through hole communicates with the first cavity and the third cavity;

[0018] When the first cavity takes in air through the first type of air holes, the third cavity takes in air through the through holes; 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, a through hole is provided in the piston member, and the first cavity and the third cavity can generate mutual connection between the cavities based on the through hole. Therefore, when the first cavity takes in air through the first type of air hole, due to the ventilation function of the through hole, the third cavity can also take in air through the through hole, so that the third cavity can produce pressure changes based on the intake situation, and the volume in the third cavity becomes larger and expands. Since the third cavity is formed by the fixed surface of the moving part and the shell, and the shell is fixed, the volume change of the first cavity can drive the movable moving part to move in the first direction away from the fixed axis, and drive the driving part to move in the first direction, realizing the driving function in the first direction. Through the setting and connection structure of the first cavity and the third cavity, two driving forces in the first direction can be provided to the moving part when the first cavity takes in air, which effectively improves the driving force of the driving part in the first direction, and is suitable for a variety of small-sized driving scenarios with large output force requirements.

[0020] Optionally, the tabletop structure is fixed to the fixed shaft via a perforated connector;

[0021] The first end of the through hole is disposed on the first surface of the mesa 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 table structure is fixed on the fixed shaft through the perforated connector, the first end of the through hole is arranged on the first surface of the table structure, and the second end is arranged at the second end of the fixed shaft, so that the through hole can normally connect the first cavity and the third cavity without adversely affecting the second cavity in the middle. The through hole is arranged in the piston member to connect the first cavity and the third cavity, which effectively reduces the complexity of the structure and the cost of the device.

[0023] Optionally, when the second cavity takes in air through the second type of air holes, the movable 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 holes, the second cavity produces a pressure change based on the air intake situation, and the volume inside the second cavity increases and expands. Since the second cavity is formed by the second surface of the table structure and the movable part, and the table structure is fixed, the volume change of the second cavity can drive the movable movable part to move in the second direction pointing to the second end of the fixed axis, 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 air holes and the second type of air holes are connected to external air pressure equipment;

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

[0027] In the above implementation process, both types of pores in the pore structure are connected to external air pressure equipment to change the pressure conditions in their respective cavities through the working conditions of the air pressure equipment. In addition, in order to achieve normal movement function, the pressure conditions between multiple cavities are linked. Therefore, the gas transmission directions of the two types of pores are opposite, so that the cavities will not have adverse effects on each other, effectively reducing adverse conditions such as stagnation and inability to move of moving parts, and improving the smoothness of the driving function of the cylinder.

[0028] Optionally, the cylinder further comprises: a first sealing member and a second sealing member;

[0029] The first sealing member is disposed between the table structure and the moving member, and the first sealing member is used to isolate the first cavity and the second cavity;

[0030] The second sealing member is disposed between the moving member and the housing, and is used to isolate the third cavity from the inner 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 seal arranged between the table structure and the moving part, and a second seal arranged between the moving part and the shell. The first seal can be used to isolate the first cavity and the second cavity with opposite driving directions, and the first cavity and the second cavity are sealed to reduce abnormal conditions caused by conduction between the first cavity and the second cavity. The third cavity can also be isolated from the internal space of the shell by the third seal, and the third cavity is sealed to reduce abnormal conditions caused by conduction between the internal space of the shell and the third cavity.

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

[0033] The first guide member is arranged between the table structure and the moving member, and the second guide member is arranged between the fixed shaft and the moving member;

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

[0035] In the above implementation process, taking into account the mutual movement between multiple structures, in order to reduce the friction of mutual movement and limit the movement direction of the moving part, the cylinder may also include a first guide member arranged between the table structure and the moving part and a second guide member arranged between the fixed shaft and the moving part. The movement direction of the moving part can be limited by the two guide members, thereby effectively reducing the adverse situation of deviation in the movement direction of the moving part. The two guide members can also reduce the friction between the moving part and other parts, thereby effectively improving the service life of the cylinder.

[0036] In a second aspect, an embodiment of the present application further provides a driving device, which includes the cylinder described in any one of the above-mentioned first aspects.

[0037] To summarize, the embodiments of the present application provide a cylinder and a driving device, which, within a limited range of cylinder sizes, forms a compact multi-layer cylinder through multiple cavities, effectively improving the driving force when the driving part is driven, and is suitable for a variety of driving scenarios that limit the cylinder size and meet a variety of driving requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0040] Figure 2 A schematic diagram of the cross-sectional structure of another cylinder provided in an embodiment of the present application.

[0041] Icons: 100-piston; 200-moving part; 300-housing; 210-pore structure; 400-driving part; 110-table structure; 120-fixed axis; A1-first cavity; A2-second cavity; A3-third cavity; 211-first type of pores; 212-second type of pores; F1-first direction; 130-through hole; 131-punched connector; F2-second direction; 511-first sealing member; 512-second sealing member; 521-first guide member; 522-second guide member. DETAILED DESCRIPTION

[0042] The technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present application.

[0043] In actual usage scenarios, due to the different requirements of some equipment, such as valves, on cylinders, some scenarios have more stringent requirements on the cylinder structure, external dimensions, etc., and require the cylinder to output a larger force value within a limited space. For example, in some valve drive scenarios, in order to improve the material transmission efficiency, the space reserved for the cylinder to drive the valve movement is very small. In the existing cylinder structure, the output force value of the cylinder is limited by the cylinder size, resulting in smaller-sized cylinders unable to output the force value required for the scene, resulting in the cylinder being unable to meet the current drive requirements.

[0044] In order to solve the above problems, an embodiment of the present application provides a cylinder and a driving device. Within a limited cylinder size range, a compact multi-layer cylinder is formed by multiple cavities, which effectively improves the driving force when the driving member 400 is driven. It is suitable for a variety of driving scenarios that limit the cylinder size and meet various driving requirements.

[0045] See also Figure 1 , Figure 1 This is a schematic diagram of a cross-sectional structure of a cylinder provided in an embodiment of the present application. The cylinder may include: a piston member 100, a moving member 200, a housing 300, a pore structure 210 and a driving member 400.

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

[0047] It should be noted that the movable part 200 is movably arranged 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 set to a table-shaped structure with an inner wall fitting the piston part 100 and an outer wall fitting the special shape of the housing 300.

[0048] Among them, since the inner wall shape of the internal space formed by the table structure 110 and the shell 300 fits together, a first cavity A1 is formed between the first surface of the table structure 110 away from the fixed axis 120 and the moving part 200, and a second cavity A2 is formed between the moving part 200 and the second surface of the table structure 110 (i.e., the opposite surface of the first surface). In addition, in order to give the moving part 200 enough movement space, there is a corresponding movement space between the outer wall of the moving part 200 and the shell 300. Therefore, a third cavity A3 can be formed between the moving part 200 and the fixed surface of the shell 300 close to the fixed axis 120.

[0049] Optionally, the pore structure 210 is disposed on the movable part 200 and is connected to the first cavity A1, the second cavity A2, and the third cavity A3. The pore structure 210 is configured to input gas into the cavity or discharge the gas inside the cavity. The driving part 400 is disposed outside the cavity. The driving part 400 can be disposed outside the shell 300 or inside the shell 300. The driving part 400 can be configured as a corresponding driving shaft, driving rod and other structures, and the driving part 400 can be connected to the movable part 200 by welding, screws, etc. The movable part 200 is configured to generate movement in the extension direction of the fixed axis 120 based on the pressure changes in multiple cavities, and drive the driving part 400 to move.

[0050] By way of example, the pore structure 210 may be a corresponding circular pore channel or other structure. The pore structure 210 may be arranged through the movable part 200, and a corresponding groove structure may also be arranged on the shell 300 to accommodate the pore structure 210. The pore structure 210 may include a plurality of pores of different types, 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 plurality of cavities respectively.

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

[0052] exist Figure 1 In the illustrated embodiment, three cavities are formed by a piston member 100, a moving member 200, and a housing 300. Gas is input into the cavity or the gas inside the cavity is discharged through a pore structure 210 connected to the cavity to change the pressure conditions in the multiple cavities. Through the pressure changes in the multiple cavities, movement is generated along the extension direction of the fixed axis 120 in the piston member 100, and the connected moving member 200 is driven to move. Since the moving member 200 is also connected to the driving member 400 outside the cavity, when the moving member 200 moves, it can also drive the driving member 400 to move, thereby realizing the driving function. Within the limited cylinder size range, a compact multi-layer cylinder is formed by multiple cavities, which effectively improves the driving force when the driving member 400 is driven, and is suitable for a variety of driving scenarios that limit the cylinder size, and meets a variety of driving requirements.

[0053] See also Figure 2 , Figure 2 A schematic diagram of the cross-sectional structure of another cylinder provided in an embodiment of the present application, wherein the pore structure 210 may include: a first type of pores 211 and a second type of pores 212 .

[0054] It should be noted that the first type of pores 211 are connected to the first cavity A1, and the second type of pores 212 are connected to the second cavity A2. In order to realize the driving function in two reciprocating directions, the pore structure 210 may include independent first type of pores 211 and second type of pores 212, and the two types of pores 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, and can realize the movement in two reciprocating directions according to the first cavity A1 and the second cavity A2, so as to realize automatic reset after completing the triggering function of the drive.

[0055] Optionally, the positions and channel alignments of the first type of air holes 211 and the second type of air holes 212 on the moving member 200 can be set according to actual conditions.

[0056] It should be noted that, when the first cavity A1 takes in air through the first type of air holes 211, the movable member 200 moves in the first direction F1 based on the pressure change of the first cavity A1, and drives the driving member 400 to move in the first direction F1; wherein the first direction F1 is the direction away from the fixed axis 120. When the first cavity A1 takes in air through the first type of air holes 211, the first cavity A1 produces a pressure change based on the air intake situation, and the volume in the first cavity A1 becomes larger and expands. Since the first cavity A1 is formed by the first surface of the table structure 110 and the movable member 200, and the table structure 110 is fixed, the volume change of the first cavity A1 can drive the movable movable member 200 to move in the first direction F1 away from the fixed axis 120, and drive the driving member 400 to move in the first direction F1, thereby realizing the driving function in the first direction F1.

[0057] Optionally, in order to increase the driving force in the first direction F1, a through hole 130 may be provided in the piston member 100, and the through hole 130 connects the first cavity A1 and the third cavity A3. When the first cavity A1 is fed with air through the first type of air holes 211, the third cavity A3 is fed 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 of the third cavity A3, and drives the driving member 400 to move in the first direction F1. A through hole 130 is provided in the piston member 100, and the first cavity A1 and the third cavity A3 can be interconnected based on the through hole 130. Therefore, when the first cavity A1 takes in air through the first type of air hole 211, due to the ventilation function of the through hole 130, the third cavity A3 can also take in air through the through hole 130, so that the third cavity A3 can produce a pressure change based on the intake situation, and the volume in the third cavity A3 becomes larger and expanded. Since the third cavity A3 is formed by the fixed surfaces of the moving part 200 and the shell 300, and the shell 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. Through the setting and connecting structure of the first cavity A1 and the third cavity A3, when air is taken in by the first cavity A1, two driving forces in the first direction F1 can be provided to the moving part 200, thereby effectively improving the driving force of the driving part 400 in the first direction F1, and is suitable for a variety of small-sized driving scenarios with large output force requirements.

[0058] It should be noted that the force-bearing area of ​​the moving member 200 in the first cavity A1 is the area of ​​the top cover corresponding to the first surface of the moving member 200 and the table structure 110. The top cover of the moving member 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 moving member 200 by buckles, screws, welding, etc., and a corresponding sealing ring and other structures are set for sealing. In the third cavity A3, since the fixed shaft 120 is fixed on the fixed surface of the shell 300, the force-bearing area of ​​the moving member 200 in the third cavity A3 is the fixed surface minus the area of ​​the intermediate fixed shaft 120. When the piston member 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 shell 300 can be increased to increase the force-bearing area of ​​the moving member 200 in the third cavity A3, and further increase the force value of the driving force applied by the third cavity A3 to the moving member 200 in the first direction F1.

[0059] Optionally, the table structure 110 can be fixed on the fixed shaft 120 by a punching connector 131. The punching connector 131 can be a connector with a hole structure such as a punching screw. On the basis of the connection of the punching connector 131, the first end of the through hole 130 is set on the first surface of the table structure 110, and the second end of the through hole 130 is set 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, and will not have an adverse effect on the middle second cavity A2. The through hole 130 is set in the piston member 100 to connect the first cavity A1 and the third cavity A3, which effectively reduces the complexity of the structure and the cost of the device.

[0060] It should be noted that in some valve-controlled driving scenarios, considering the sealing characteristics of the valve closing, the force value requirement of the driving force pointing in the direction of the valve, that is, the first direction F1, is relatively high, while the force value requirement of the driving force in the opposite direction of the first direction F1, that is, the second direction F2, is relatively low. Therefore, only one driving force is required to complete the driving function of the second direction F2. When air is taken in by the second cavity A2 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 is taken in by the second cavity A2 through the second type of air holes 212, the second cavity A2 generates a pressure change 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 table structure 110 and the movable part 200, and the table structure 110 is fixed, the volume change of the second cavity A2 can drive the movable movable part 200 to move in the second direction F2 pointing to the second end of the fixed axis 120, and drive the driving part 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 holes 211 and the second type of air holes 212 are connected to an external air pressure device to change the pressure conditions in their respective cavities through the working conditions of the air pressure device. In addition, in order to achieve a normal moving function, the pressure conditions between multiple cavities are linked. Therefore, the gas transmission direction in the first type of air holes 211 is opposite to the gas transmission direction of the second type of air holes 212, so that the cavities will not have an adverse effect on each other, effectively reducing the unfavorable conditions such as stagnation and inability to move of the moving part 200, and improving the smoothness of the driving function of the cylinder.

[0062] For example, when the gas transmission direction of the first type of air hole 211 is the air intake direction, the first cavity A1 and the third cavity A3 take in air, and the gas transmission direction of the second type of air hole 212 is the air outlet direction, and the second cavity A2 exhausts air; when the gas transmission direction of the second type of air hole 212 is the air intake direction, the second cavity A2 takes in air, and the gas transmission direction of the first type of air hole 211 is the air outlet direction, and the first cavity A1 and the third cavity A3 exhaust air, so that multiple cavities can produce normal air pressure changes, so that the moving part 200 can be driven normally.

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

[0064] Optionally, in order 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 table structure 110 and the moving part 200, and is used to isolate the first cavity A1 and the second cavity A2. The second seal 512 is disposed between the moving part 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 be used to isolate the first cavity A1 and the second cavity A2 in opposite driving directions, and the first cavity A1 and the second cavity A2 are sealed to reduce abnormal conditions caused by conduction between the first cavity A1 and the second cavity A2. The third seal can also be used to isolate the third cavity A3 from the internal space of the housing 300, and the third cavity A3 is sealed to reduce abnormal conditions caused by conduction between the internal space of the housing 300 and the third cavity A3.

[0065] For example, a corresponding first groove may be provided on the contact surface of the table structure 110 close to the moving member 200 to accommodate the first sealing member 511 , and a corresponding second groove may be provided on the contact surface of the moving member 200 close to the housing 300 to accommodate the second sealing member 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-type seals with self-sealing effect, such as z-type sealing rings made of rubber materials, which can effectively reduce friction during movement and optimize the sealing effect through their own deformation.

[0067] Optionally, in order to reduce the friction of the mutual movement and limit the movement direction of the moving member 200, the cylinder may further include: a first guide 521 and a second guide 522, taking into account the mutual movement between the multiple structures. The first guide 521 is arranged between the table structure 110 and the moving member 200, and the second guide 522 is arranged between the fixed shaft 120 and the moving member 200. The first guide 521 and the second guide 522 are used to limit the movement direction of the moving member 200. The movement direction of the moving member 200 can be limited by the two guides, effectively reducing the unfavorable situation of the deviation of the movement direction of the moving member 200. The friction between the moving member 200 and other parts can also be reduced by the two guides, effectively improving the service life of the cylinder.

[0068] Optionally, the first guide member 521 can be set to a corresponding annular structure according to the planar shape of the table structure 110. For example, when the table structure 110 is a circular table, the first guide member 521 can be set to a circular ring structure. The second guide member 522 can be set to 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 set to a circular ring structure. In addition, 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 movable member 200 and the second guide member 522.

[0069] Optionally, the first guide member 521 and the second guide member 522 can be configured to be corresponding wear-resistant materials, such as stainless steel, cemented carbide, ceramic material, or metal material with a wear-resistant coating.

[0070] For example, a corresponding third groove may be provided on the contact surface of the table structure 110 close to 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 close to the fixed shaft 120 to accommodate the second guide member 522 .

[0071] The embodiment of the present application also provides a driving device, which may include one or more cylinders described in the above embodiments.

[0072] Optionally, when there are multiple cylinders in the driving device, in order to realize the linkage control of multiple cylinders, the moving parts of the multiple cylinders can be fixedly connected, or an integral moving part can be directly set to be connected to the inside of the multiple cylinders respectively, and the driving parts are uniformly linked and controlled by the multiple cylinders.

[0073] Since the principle of solving the problem by the driving device in the embodiment of the present application is similar to that of the aforementioned embodiment of the cylinder, the implementation of the driving device in this embodiment can refer to the description in the aforementioned embodiment of the cylinder, and the repeated parts will not be repeated.

[0074] In addition, the various parts in the various embodiments of the present application can be integrated together to form an independent part, or the various parts can exist separately, or two or more parts can be integrated to form an independent part.

[0075] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection 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 the subsequent drawings.

[0076] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, article or device including the elements.

Claims

1. A cylinder, characterized in that: The cylinder comprises: a piston, a moving part, a shell, a pore structure and a driving part; The piston member comprises a table structure and a fixed shaft; a first end of the fixed shaft is fixedly connected to the table structure, and a second end of the fixed shaft is fixed in the housing; the movable member is movably disposed between the piston member and the housing; The first surface of the table structure facing away from the fixed axis and the moving element form a first cavity, the moving element and the second surface of the table structure form a second cavity, and the moving element and the fixed surface of the housing close to the fixed axis form a third cavity; The pore structure is disposed on the moving part and is connected to the first cavity, the second cavity, and the third cavity; the pore structure is configured to input gas into the cavity or discharge gas inside the cavity; The driving member is arranged outside the cavity and connected to the moving member, and the moving member is configured to generate movement in the extending direction of the fixed axis based on the pressure change in the multiple cavities, and drive the driving member to move.

2. The cylinder according to claim 1, characterized in that in, The pore structure includes: first-type pores and second-type pores; The first type of pores are connected to the first cavity; The second type of pores are connected to the second cavity.

3. The cylinder according to claim 2, characterized in that in, When the first cavity takes in air through the first type of air holes, the movable 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 a direction away from the fixed axis.

4. The cylinder according to claim 3, characterized in that in, The piston member is provided with a through hole, and the through hole communicates with the first cavity and the third cavity; When the first cavity takes in air through the first type of air holes, the third cavity takes in air through the through holes; 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.

5. The cylinder according to claim 4, characterized in that in, The table structure is fixed on the fixed shaft through a punched connector; The first end of the through hole is disposed on the first surface of the mesa structure, and the second end of the through hole is disposed at the second end of the fixed shaft.

6. The cylinder according to claim 2, characterized in that in, When the second cavity takes in air through the second type of air holes, the movable 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.

7. The cylinder according to claim 2, characterized in that in, The first type of air holes and the second type of air holes are connected to an external air pressure device; The gas transmission direction in the first type of pores is opposite to the gas transmission direction in the second type of pores.

8. The cylinder according to any one of claims 1 to 7, characterized in that: The cylinder further comprises: a first sealing member and a second sealing member; The first sealing member is disposed between the table structure and the moving member, and the first sealing member is used to isolate the first cavity and the second cavity; The second sealing member is disposed between the moving member and the housing, and is used to isolate the third cavity from the inner space of the housing.

9. The cylinder according to any one of claims 1 to 7, characterized in that: The cylinder further comprises: a first guide member and a second guide member; The first guide member is arranged between the table structure and the moving member, and the second guide member is arranged between the fixed shaft and the moving member; The first guide member and the second guide member are used to limit the moving direction of the moving member.

10. A driving device, characterized in that: The driving device comprises the cylinder according to any one of claims 1-9.

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