Air pressure controlled long stroke slide rail and method of use

Abstract

The application provides a long-stroke slide rail with air pressure control and a use method thereof. The long-stroke slide rail comprises a bottom plate, an air inlet and exhaust structure and a pressure relief assembly. The bottom plate is provided with a groove along the length direction. A guide rod is installed in the groove. The guide rod is a hollow structure. The open end of the guide rod and the two ends of the bottom plate along the width direction are communicated respectively. The connection part of the bottom plate and the guide rod is provided with the air inlet and exhaust structure and the pressure relief assembly. The air inlet and exhaust structure is used for air inlet or exhaust in the guide rod. The pressure relief assembly is used for pressure relief of the guide rod. In the application, the cavity pressure of the guide rod is controllable through the cooperation of the bottom plate, the air inlet and exhaust structure and the pressure relief assembly. The air inlet and exhaust structure is similar to a valve type structure, which is more convenient when the long-stroke slide rail is used. The safety of operation is guaranteed through pressure relief of the pressure relief assembly. The application is suitable for wide promotion.

Description

Technical Field

[0001] This invention belongs to the field of cylinder stroke design technology, and relates to a long-stroke slide rail controlled by air pressure and its usage method. Background Technology

[0002] A rodless cylinder is a cylinder that uses a piston to connect directly or indirectly to an external actuator, causing the actuator to reciprocate. The biggest advantage of this type of cylinder is that it saves installation space. It is divided into magnetic coupler rodless cylinders and mechanical rodless cylinders.

[0003] CN203756639U discloses a long-stroke cylinder, in which a small cylinder is installed inside a large cylinder. The small cylinder acts as the piston rod of the large cylinder. The extended part of the small cylinder is connected to the large cylinder, and the retracted part of the small cylinder is connected to an external air pipe through a retractable hose. In this way, under the control of a solenoid valve, when the cylinder extends, its stroke is the superposition of the strokes of the large and small cylinders. When it retracts, the small cylinder is retracted into the large cylinder. The length of the entire cylinder is the length of the large cylinder, thus realizing a long-stroke cylinder.

[0004] CN2799990 discloses a long-stroke cylinder with guiding, anti-rotation, and self-locking functions. It includes a rear cover with a lower air port and a cylinder barrel connected to the rear cover. The upper end of the cylinder barrel is connected to a front cover with an upper air port. A piston and piston rod are provided inside the cylinder barrel. The piston and piston rod can slide up and down. The upper end of the piston rod is connected to a flange. The lower end of the flange is connected to at least three primary guiding anti-rotation rods. Each primary guiding anti-rotation rod passes through the front cover and its lower end is connected to a locking positioning block.

[0005] CN113697393A discloses a long-stroke motion module, including a guide rail assembly, a material frame, a dragging assembly, and a drive assembly. The material frame and the dragging assembly are slidably connected to the guide rail assembly. The dragging assembly includes a body and an air receiving module, a clamping cylinder, and an induction check valve disposed on the body. The induction check valve is connected to both the air receiving module and the clamping cylinder. The guide rail assembly is provided with an air supply module corresponding to the air receiving module. When the air receiving module and the air supply module are connected, the clamping cylinder has a clamping state and a releasing state. In the clamping state, the dragging assembly is connected to the material frame; in the releasing state, the dragging assembly is separated from the material frame. When the air receiving module and the air supply module are separated, the clamping cylinder remains in the clamping state or the releasing state.

[0006] However, existing rodless cylinders still suffer from complex internal structures, inconvenient exhaust and intake, and insufficient stroke. Therefore, there is an urgent need to design and develop a long-stroke slide rail with pneumatic control to overcome the shortcomings of existing technology and meet the needs of industrial applications. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a pneumatically controlled long-stroke slide rail and its usage method. In this invention, the combined arrangement of the base plate, air intake and exhaust structure, and pressure relief component makes the cavity pressure of the guide rod controllable. Furthermore, the valve-like structure of the air intake and exhaust structure makes the use of the long-stroke slide rail more convenient, and the pressure relief component ensures operational safety by relieving pressure, making it suitable for widespread application.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a long-stroke slide rail with pneumatic control. The long-stroke slide rail includes a base plate, an air intake and exhaust structure, and a pressure relief component. The base plate has a groove along its length, and a guide rod is installed in the groove. The guide rod has a hollow structure, and the open end of the guide rod is connected to both ends of the base plate along its width. The air intake and exhaust structure and the pressure relief component are provided at the connection between the base plate and the guide rod. The air intake and exhaust structure is used for ventilation and air intake or exhaust within the guide rod, and the pressure relief component is used to relieve pressure on the guide rod.

[0010] In this invention, the combined arrangement of the base plate, air intake and exhaust structure, and pressure relief component makes the cavity pressure of the guide rod controllable. The air intake and exhaust structure, similar to a valve, is more convenient when using long-stroke slide rails. The pressure relief component ensures operational safety and is suitable for widespread application.

[0011] It should be noted that the material and size of the base plate are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The base plate can be made of plastic.

[0012] As a preferred embodiment of the present invention, the guide rod is a cylinder with an internal cavity.

[0013] Preferably, one closed end of the guide rod is fixedly connected to one side of the base plate with a groove along its length.

[0014] Preferably, the length of the guide rod is the same as the length of the groove.

[0015] Preferably, the base plate has a concave structure.

[0016] It should be noted that the present invention does not impose any special limitations on the material, shape, and size of the guide rod, and those skilled in the art can make adaptive adjustments according to the actual situation. The guide rod can be made of plastic, and its shape only needs to match the shape of the groove on the base plate.

[0017] As a preferred embodiment of the present invention, the base plate is provided with air inlets at both ends along the width direction, and the air inlets are provided corresponding to the open ends of the guide rod.

[0018] It should be noted that the shape and size of the air intake are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The shape of the air intake can be circular.

[0019] Preferably, the base plate has a connection port on the side away from the guide rod. One end of the connection port is used to connect to an air pump, and the other end is connected to the open end of the guide rod through the air inlet.

[0020] It should be noted that the present invention does not impose any special limitations on the number, shape, and size of the connection ports, and those skilled in the art can make adaptive adjustments according to the actual situation. The shape of the connection port can be circular, and the number of connection ports can be 1, 2, 4, 5, etc.

[0021] As a preferred embodiment of the present invention, the air intake and exhaust structure includes an air vent disposed at one end of the guide rod near the air intake.

[0022] Preferably, the diameter of the vent is the same as the inner diameter of the guide rod.

[0023] Preferably, the side of the vent facing the air inlet is arc-shaped.

[0024] As a preferred embodiment of the present invention, a support rod is provided between the vent and the inlet, and the support rod is placed perpendicular to the air intake direction.

[0025] It should be noted that the present invention does not impose any special limitations on the material, shape, and size of the support rod, and those skilled in the art can make adaptive adjustments according to the actual situation. The support rod can be made of plastic.

[0026] Preferably, a connecting rod is slidably connected to the support rod.

[0027] It should be noted that the material, shape, and size of the connecting rod are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The connecting rod can be made of plastic.

[0028] Preferably, the connecting rod is placed perpendicular to the support rod, and at least two connecting rods are provided.

[0029] Preferably, a sealing cap is connected to the end of the connecting rod away from the support rod.

[0030] It should be noted that the material, shape, and size of the sealing cap are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The sealing cap can be made of plastic.

[0031] Preferably, the side of the sealing cap away from the connecting rod is sealed to the vent and the inlet, respectively.

[0032] Preferably, the sealing cap is connected to the support rod via an elastic element.

[0033] Preferably, the elastic element is a compression spring.

[0034] It should be noted that the material, shape, and size of the compression spring are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The material of the compression spring can be various metals or plastics.

[0035] As a preferred embodiment of the present invention, the support rod is symmetrically provided with slide rails, and each slide rail is slidably connected to a connecting rod.

[0036] Preferably, the connecting rod is a rack.

[0037] Preferably, a gear is provided between the connecting rods, and the connecting rods and the gear are meshed together.

[0038] As a preferred embodiment of the present invention, the outer surface of the sealing cap is covered with a sealing gasket.

[0039] Preferably, the sealing gasket is made of any one of rubber, nylon, or plastic.

[0040] It should be noted that the shape and size of the sealing gasket are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation.

[0041] As a preferred embodiment of the present invention, the pressure relief assembly includes a cover plate, which is disposed on the inner wall of the vent and the inlet, thereby forming a negative angle with the vent and the inlet.

[0042] It should be noted that the material, shape, and size of the cover plate are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The cover plate can be made of various metals or plastics, and its shape can be rectangular.

[0043] Preferably, the cover plate is movably connected to the vent and the inlet via a hinge shaft.

[0044] Preferably, a torsion spring is movably connected to the hinge shaft.

[0045] It should be noted that the material, shape, and size of the torsion spring are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The torsion spring is a well-known concept among those skilled in the art.

[0046] Preferably, at least two cover plates are provided.

[0047] As a preferred embodiment of the present invention, a sliding plate is provided on the side of the guide rod that is connected to the base plate along the length direction.

[0048] It should be noted that the material, shape, and size of the sliding plate are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The sliding plate can be made of various metals or plastics, as long as its shape matches the shape of the guide rod's outer surface.

[0049] Preferably, the sliding plate is slidably connected to the outer surface of the guide rod.

[0050] Preferably, the sliding plate is a concave plate, and the opening shape of the concave plate is the same as the outer contour of the guide rod.

[0051] Preferably, a piston is slidably connected inside the guide rod.

[0052] Preferably, the sliding plate and the piston are magnetically levitated together.

[0053] It should be noted that the present invention does not impose any special limitations on the material, shape, and size of the piston, and those skilled in the art can make adaptive adjustments according to the actual situation. The piston can be made of various metals or plastics, as long as its shape matches the shape of the inner wall of the guide rod.

[0054] It should be noted that the present invention controls the internal pressure of the guide rod through the air intake and exhaust structure, and the sealing cover is connected to the vent, similar to a valve structure, which is more convenient to use. When the pressure on each side increases, it will automatically open, and the structure is simple and practical. Pressure is released through the pressure relief component. Because the cover plate forms a negative angle with the inner wall of the vent, when exhausting air, the cover plate will automatically open due to the back wind pressure; when the pressure increases, the cover plate will fit more tightly with the wind.

[0055] Secondly, the present invention provides a method of using the long-stroke slide rail described in the first aspect, the method comprising:

[0056] In use, the air pump is connected to the base plate, and air is introduced or vented to the guide rod on the base plate through the air intake and exhaust structure. When the pressure inside the guide rod increases, the pressure inside the guide rod is adjusted through the pressure relief component.

[0057] It should be noted that the working principle of this invention includes: when in use, first connect the air pump and other equipment to the base plate through the connection port; when it is necessary to move the sliding plate, drive the air pumps on both sides to inflate. When the pressure on one side increases, the sealing cover connected by the spring moves. The connecting rod is connected by gears, so the two connecting rods move in opposite directions to open the vent. When the piston moves, the pressure on the other side increases, and the vent will also open. At the same time, due to the back wind pressure, the cover will automatically open to exhaust air.

[0058] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0059] In this invention, the combined arrangement of the base plate, air intake and exhaust structure, and pressure relief component makes the cavity pressure of the guide rod controllable. The air intake and exhaust structure, similar to a valve, is more convenient when using long-stroke slide rails. The pressure relief component ensures operational safety and is suitable for widespread application. Attached Figure Description

[0060] Figure 1 A schematic diagram of the structure of a long-stroke slide rail provided in a specific embodiment of the present invention;

[0061] Figure 2 A side view of a long-stroke slide rail provided for a specific embodiment of the present invention;

[0062] Figure 3 A cross-sectional view of a long-stroke slide rail provided in a specific embodiment of the present invention;

[0063] Figure 4 A partial cross-sectional view of the connection between the guide rod and the base plate in a long-stroke slide rail according to a specific embodiment of the present invention;

[0064] Figure 5 A partial schematic diagram of the connection between the connecting rod and the support rod in a long-stroke slide rail according to a specific embodiment of the present invention;

[0065] Among them, 1-base plate; 2-guide rod; 3-sliding plate; 4-piston; 5-connection port; 6-hollow structure; 7-vent; 8-sealing cover; 9-connecting rod; 10-elastic element; 11-support rod; 12-cover plate; 13-air inlet; 14-gear; 15-slide track. Detailed Implementation

[0066] It should be understood that in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0067] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" 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 invention based on the specific circumstances.

[0068] Those skilled in the art should understand that the present invention necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving complete process, but the above content is not the main inventive point of the present invention. Those skilled in the art can add layouts based on process flow and equipment structure selection, and the present invention does not make any special requirements or specific limitations in this regard.

[0069] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0070] In one specific embodiment, the present invention provides a pneumatically controlled long-stroke slide rail, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the long-stroke slide rail includes a base plate 1, an air intake and exhaust structure, and a pressure relief assembly. The base plate 1 has a groove along its length, and a guide rod 2 is installed in the groove. The guide rod 2 is a hollow structure 6, and the open end of the guide rod 2 is connected to both ends of the base plate 1 along its width. An air intake and exhaust structure and a pressure relief assembly are provided at the connection between the base plate 1 and the guide rod 2. The air intake and exhaust structure is used for ventilation and air intake or exhaust in the guide rod 2, and the pressure relief assembly is used to relieve pressure on the guide rod 2.

[0071] In this invention, the combined arrangement of the base plate 1, the air intake and exhaust structure, and the pressure relief component makes the cavity pressure of the guide rod 2 controllable. The air intake and exhaust structure, similar to a valve, is more convenient when using long-stroke slide rails. The pressure relief component ensures operational safety and is suitable for widespread application.

[0072] It should be noted that the material and size of the base plate 1 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The material of the base plate 1 can be plastic.

[0073] The guide rod 2 is a cylinder with an internal cavity. One closed end of the guide rod 2 is fixedly connected to one side of the base plate 1 with a groove along its length. The length of the guide rod 2 is the same as the length of the groove. The base plate 1 has a concave structure. It should be noted that the material, shape, and size of the guide rod 2 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The guide rod 2 can be made of plastic, and its shape can match the shape of the groove on the base plate 1.

[0074] The base plate 1 has air inlets 13 at both ends along its width, corresponding to the open ends of the guide rod 2. It should be noted that the shape and size of the air inlets 13 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The shape of the air inlets 13 can be circular.

[0075] A connection port 5 is provided on the side of the base plate 1 away from the guide rod 2. One end of the connection port 5 is used to connect to the air pump, and the other end is connected to the open end of the guide rod 2 through the air inlet 13. It should be noted that the number, shape, and size of the connection ports 5 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The shape of the connection port 5 can be circular, and the number of connection ports 5 can be 1, 2, 4, 5, etc.

[0076] The air intake and exhaust structure includes a vent 7 located at one end of the guide rod 2 near the air intake 13. The diameter of the vent 7 is the same as the inner diameter of the guide rod 2. The side of the vent 7 facing the air intake 13 is arc-shaped. A support rod 11 is provided between the vent 7 and the air intake 13, and the support rod 11 is placed perpendicular to the air intake direction. It should be noted that the material, shape, and size of the support rod 11 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The material of the support rod 11 can be plastic.

[0077] A connecting rod 9 is slidably connected to the support rod 11. It should be noted that the material, shape, and size of the connecting rod 9 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual circumstances. The connecting rod 9 can be made of plastic.

[0078] The connecting rod 9 is placed perpendicular to the support rod 11, and at least two connecting rods 9 are provided. A sealing cap 8 is connected to the end of the connecting rod 9 furthest from the support rod 11. It should be noted that the material, shape, and size of the sealing cap 8 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The sealing cap 8 can be made of plastic.

[0079] The sealing cap 8, on the side furthest from the connecting rod 9, is sealed to both the vent 7 and the inlet 13. The sealing cap 8 is connected to the support rod 11 via an elastic element 10, which is a compression spring. It should be noted that the material, shape, and size of the compression spring are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The compression spring can be made of various metals or plastics.

[0080] The support rod 11 is symmetrically provided with slide rails 15, and each slide rail 15 is slidably connected to a connecting rod 9. The connecting rod 9 is a rack, and a gear 14 is provided between the connecting rods 9, with the connecting rods 9 and the gear 14 meshing together. The outer surface of the sealing cover 8 is covered with a sealing gasket, which is made of any one of rubber, nylon, or plastic. It should be noted that the shape and size of the sealing gasket are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation.

[0081] The pressure relief assembly includes a cover plate 12, which is disposed on the inner wall of the vent 7 and the inlet 13, thus forming a negative angle with the vent 7 and the inlet 13. It should be noted that the material, shape, and size of the cover plate 12 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The cover plate 12 can be made of various metals or plastics, and its shape can be rectangular.

[0082] At least two cover plates 12 are provided. The cover plates 12 are movably connected to the vent 7 and the inlet 13 via hinge shafts, and torsion springs are movably connected to the hinge shafts. It should be noted that the material, shape, and size of the torsion springs are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. Among them, torsion springs are well known to those skilled in the art.

[0083] A sliding plate 3 is provided on the side of the guide rod 2 that connects to the base plate 1 along its length. It should be noted that the material, shape, and size of the sliding plate 3 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The sliding plate 3 can be made of various metals or plastics, and its shape should match the shape of the outer surface of the guide rod 2.

[0084] A sliding plate 3 is slidably connected to the outer surface of the guide rod 2. The sliding plate 3 is a concave plate, and the opening shape of the concave plate is the same as the outer contour of the guide rod 2. A piston 4 is slidably connected inside the guide rod 2, and the sliding plate 3 and the piston 4 are magnetically levitated together. It should be noted that the material, shape, and size of the piston 4 are not specifically limited in this invention, and those skilled in the art can make adaptive adjustments according to the actual situation. The piston 4 can be made of various metals or plastics, and its shape can be matched to the shape of the inner wall of the guide rod 2.

[0085] It should be noted that the present invention controls the internal pressure of the guide rod 2 through the air intake and exhaust structure, and the sealing cover 8 is connected to the vent 7, which is similar to a valve structure and is more convenient to use. When the pressure on each side increases, it will automatically open. The structure is simple and practical. Pressure is released through the pressure relief component. Because the cover plate 12 and the inner wall of the vent 7 form a negative angle, when exhausting air, the cover plate 12 will automatically open due to the back wind pressure. When the pressure increases, the cover plate will fit more tightly with the wind.

[0086] In another specific embodiment, the present invention provides a method for using the above-mentioned long-stroke slide rail, the method comprising:

[0087] In use, the air pump is connected to the base plate 1, and air is introduced or vented to the guide rod 2 on the base plate 1 through the air intake and exhaust structure. When the pressure inside the guide rod 2 increases, the pressure inside the guide rod 2 is adjusted through the pressure relief component.

[0088] It should be noted that the working principle of the present invention includes: when in use, the air pump and other equipment are first connected to the base plate 1 through the connection port 5; when the sliding plate 3 needs to be moved, the air pumps on both sides are driven to inflate. When the pressure on one side increases, the sealing cover 8 connected by the spring moves. The connecting rod 9 is connected by the gear 14, so the two connecting rods 9 move towards each other and open the vent 7. When the piston 4 moves, the pressure on the other side increases, and the vent 7 will also open. At the same time, due to the back wind pressure, the cover plate 12 will automatically open to achieve exhaust.

[0089] Example 1

[0090] This embodiment provides a pneumatically controlled long-stroke slide rail, wherein:

[0091] The long-stroke slide rail includes a base plate 1, an air intake and exhaust structure, and a pressure relief assembly. The base plate 1 has a groove along its length, and a guide rod 2 is installed in the groove. The guide rod 2 is a hollow structure 6, and the open end of the guide rod 2 is connected to both ends of the base plate 1 along its width. An air intake and exhaust structure and a pressure relief assembly are provided at the connection between the base plate 1 and the guide rod 2. The air intake and exhaust structure is used for ventilation and air intake or exhaust in the guide rod 2, and the pressure relief assembly is used to relieve pressure on the guide rod 2.

[0092] The guide rod 2 is a cylinder with an internal cavity. One closed end of the guide rod 2 is fixedly connected to one side of the base plate 1 with a groove along its length. The length of the guide rod 2 is the same as the length of the groove. The base plate 1 has a concave structure. Both ends of the base plate 1 along its width are provided with air inlets 13, which are provided corresponding to the open ends of the guide rod 2.

[0093] A connection port 5 is provided on the side of the base plate 1 away from the guide rod 2. One end of the connection port 5 is used to connect to the air pump, and the other end is connected to the open end of the guide rod 2 through the air inlet 13.

[0094] The air intake and exhaust structure includes a vent 7 located at one end of the guide rod 2 near the air intake 13. The diameter of the vent 7 is the same as the inner diameter of the guide rod 2. The side of the vent 7 facing the air intake 13 is arc-shaped. A support rod 11 is provided between the vent 7 and the air intake 13, and the support rod 11 is placed perpendicular to the air intake direction.

[0095] A connecting rod 9 is slidably connected to the support rod 11. Two connecting rods 9 are placed perpendicular to the support rod 11. A sealing cap 8 is connected to the end of the connecting rod 9 furthest from the support rod 11. The side of the sealing cap 8 furthest from the connecting rod 9 is respectively sealed to the vent 7 and the inlet 13. The sealing cap 8 is connected to the support rod 11 via an elastic element 10, which is a compression spring. Slides 15 are symmetrically arranged on the support rod 11, and a corresponding connecting rod 9 is slidably connected within each slide 15. The connecting rod 9 is a rack, and a gear 14 is arranged between the connecting rods 9, meshing with each other. A sealing gasket made of rubber is covered on the outer surface of the sealing cap 8.

[0096] The pressure relief assembly includes cover plates 12, which are disposed on the inner walls of the vent 7 and the inlet 13, thus forming a negative angle with the vent 7 and the inlet 13. Four cover plates 12 are provided, and each cover plate 12 is movably connected to the vent 7 and the inlet 13 via a hinge shaft, on which a torsion spring is movably connected. A sliding plate 3 is provided on the side of the guide rod 2 that is connected to the base plate 1 along its length. The sliding plate 3 is slidably connected to the outer surface of the guide rod 2. The sliding plate 3 is a concave plate, and the opening shape of the concave plate is the same as the outer contour of the guide rod 2. A piston 4 is slidably connected inside the guide rod 2, and the sliding plate 3 and the piston 4 are magnetically levitated together.

[0097] In summary, the present invention, through the coordinated arrangement of the base plate, the air intake and exhaust structure, and the pressure relief component, makes the cavity pressure of the guide rod controllable. Furthermore, the valve-like structure of the air intake and exhaust structure makes it more convenient to use long-stroke slide rails, and the pressure relief component ensures operational safety by relieving pressure, making it suitable for widespread application.

[0098] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A pneumatically controlled long-stroke slide rail, characterized in that, The long-stroke slide rail includes a base plate, an air intake and exhaust structure, and a pressure relief assembly. The base plate has a groove along its length, and a guide rod is installed in the groove. The guide rod has a hollow structure, and its open end is connected to both ends of the base plate along its width. The air intake and exhaust structure and the pressure relief assembly are provided at the connection between the base plate and the guide rod. The air intake and exhaust structure is used for ventilation and air intake or exhaust within the guide rod, and the pressure relief assembly is used to relieve pressure on the guide rod. The base plate is provided with air inlets at both ends along the width direction; The air intake and exhaust structure includes an air vent located at one end of the guide rod near the air intake. A support rod is provided between the vent and the inlet, and a connecting rod is slidably connected to the support rod. The support rod is symmetrically provided with slide rails, and each slide rail is slidably connected to a connecting rod. The connecting rod is a rack and pinion, and a gear is provided between the connecting rods. The connecting rods and the gears are meshed together.

2. The long-stroke slide rail according to claim 1, characterized in that, The guide rod is a cylinder with an internal cavity.

3. The long-stroke slide rail according to claim 1, characterized in that, One closed end of the guide rod is fixedly connected to the side of the base plate with a groove along its length.

4. The long-stroke slide rail according to claim 1, characterized in that, The length of the guide rod is the same as the length of the groove.

5. The long-stroke slide rail according to claim 1, characterized in that, The base plate has a concave structure.

6. The long-stroke slide rail according to claim 1, characterized in that, The air inlet is provided at the open end of the guide rod.

7. The long-stroke slide rail according to claim 1, characterized in that, The base plate has a connection port on the side away from the guide rod. One end of the connection port is used to connect to an air pump, and the other end is connected to the open end of the guide rod through the air inlet.

8. The long-stroke slide rail according to claim 1, characterized in that, The diameter of the vent is the same as the inner diameter of the guide rod.

9. The long-stroke slide rail according to claim 1, characterized in that, The side of the vent facing the air inlet is arc-shaped.

10. The long-stroke slide rail according to claim 1, characterized in that, The support rod is placed perpendicular to the air intake direction.

11. The long-stroke slide rail according to claim 1, characterized in that, The connecting rod is placed perpendicular to the support rod, and there are at least two connecting rods.

12. The long-stroke slide rail according to claim 1, characterized in that, The end of the connecting rod away from the support rod is connected to a sealing cap.

13. The long-stroke slide rail according to claim 12, characterized in that, The sealing cap is sealed to the vent and the inlet on the side away from the connecting rod.

14. The long-stroke slide rail according to claim 12, characterized in that, The sealing cap is connected to the support rod via an elastic element.

15. The long-stroke slide rail according to claim 14, characterized in that, The elastic element is a compression spring.

16. The long-stroke slide rail according to claim 12, characterized in that, The outer surface of the sealing cap is covered with a sealing gasket.

17. The long-stroke slide rail according to claim 16, characterized in that, The sealing gasket is made of any one of rubber, nylon, or plastic.

18. The long-stroke slide rail according to claim 1, characterized in that, The pressure relief assembly includes a cover plate disposed on the inner wall of the vent and the inlet, thereby forming a negative angle with the vent and the inlet.

19. The long-stroke slide rail according to claim 18, characterized in that, The cover plate is movably connected to the vent and the inlet via a hinge shaft.

20. The long-stroke slide rail according to claim 19, characterized in that, A torsion spring is movably connected to the hinge shaft.

21. The long-stroke slide rail according to claim 18, characterized in that, The cover plate is provided in at least two.

22. The long-stroke slide rail according to claim 1, characterized in that, The guide rod has a sliding plate on the side opposite to the guide rod and the base plate that are connected along the length direction.

23. The long-stroke slide rail according to claim 22, characterized in that, The sliding plate is slidably connected to the outer surface of the guide rod.

24. The long-stroke slide rail according to claim 22, characterized in that, The sliding plate is a concave plate, and the opening shape of the concave plate is the same as the outer contour of the guide rod.

25. The long-stroke slide rail according to claim 22, characterized in that, A piston is slidably connected inside the guide rod.

26. The long-stroke slide rail according to claim 25, characterized in that, The sliding plate and the piston are magnetically levitated together.

27. A method of using a long-stroke slide rail according to any one of claims 1-26, characterized in that, The method of use includes: In use, the air pump is connected to the base plate, and air is introduced or vented to the guide rod on the base plate through the air intake and exhaust structure. When the pressure inside the guide rod increases, the pressure inside the guide rod is adjusted through the pressure relief component.

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