Shaping oil cylinder with high reliability

Abstract

The utility model relates to a reshaping oil cylinder with high reliability, which comprises a cylinder barrel, a piston rod, a piston, an oil hole, a fixing mechanism and a reshaping mechanism, the cylinder barrel is transversely arranged, the right end of the cylinder barrel is provided with a cylinder bottom, the left end of the cylinder barrel is provided with a cylinder cover, the right end of the cylinder bottom is connected with the fixing mechanism and is used for being connected with an external part to fix the cylinder barrel, and the piston rod is arranged on the inner circumference of the cylinder barrel and the cylinder cover. The piston is arranged on the tail side of the right end of the piston rod, and a shaping mechanism is arranged on the tail side of the left end of the piston rod and used for shaping an external component under the transmission effect of the piston rod. The first oil hole is located at the right end of the cylinder cover, penetrates through the cylinder barrel and is communicated with the inner circumference of the cylinder barrel, and the second oil hole penetrates through the cylinder bottom and is communicated with the inner circumference of the cylinder barrel. Reliability of the oil cylinder is improved, accurate pressure control and stable movement are achieved, shaping quality is improved, maintenance cost is reduced, and equipment manufacturing and maintenance are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic cylinder, specifically relates to a high reliability shaping oil cylinder. BACKGROUND

[0002] In the existing shaping oil cylinder technical field, shaping oil cylinder as the core component of various material shaping processing, its performance directly concerns product quality and production efficiency. However, traditional shaping oil cylinder has a series of problems to be solved in practical application.

[0003] From the structure, the overall structure design of traditional shaping oil cylinder is not reasonable. The connection mode between the cylinder cover, cylinder barrel and cylinder bottom of part oil cylinder is not stable enough, under the action of long-term high pressure environment and frequent reciprocating motion, the connecting part is prone to looseness, deformation and even fracture, which greatly reduces the stability and reliability of the oil cylinder, increases the maintenance cost of the equipment, and may cause production interruption due to sudden failure, causing great economic loss.

[0004] In pressure control, traditional shaping oil cylinder lacks effective real-time monitoring and precise control mechanism. As the pressure change data in the oil cylinder cannot be accurately obtained, the operator cannot timely and accurately adjust the pressure according to the specific requirements of the shaping process. This makes the pressure fluctuate greatly during the shaping process, which cannot guarantee stable shaping force output, and further leads to obvious defects in the size precision and shape consistency of the processed products, which cannot meet the strict requirements of modern manufacturing industry for high-precision products.

[0005] Sealing and guiding performance is also the short board of traditional shaping oil cylinder. Its sealing structure is usually simple, and the quality and performance of the sealing material are limited, which may cause aging, wear and other problems after long-term use, leading to frequent hydraulic oil leakage. The leakage of hydraulic oil not only causes resource waste and environmental pollution, but also makes the internal pressure of the oil cylinder unstable, affecting the normal movement of the piston rod. At the same time, the precision and reliability of the guiding device are insufficient, which cannot provide precise guidance for the movement of the piston and piston rod, leading to the problems of deviation and jam during the movement, further reducing the shaping precision and stability, and affecting the product quality.

[0006] In addition, traditional shaping oil cylinder generally lacks effective buffer protection measures. When the piston moves to the limit position, it often collides with the cylinder bottom or cylinder cover, producing strong impact force. This impact force not only causes serious damage to the internal components of the oil cylinder, accelerates the wear and aging of the components, shortens the service life of the oil cylinder, but also may cause vibration and noise of the equipment, affect the working environment, and even threaten the safety of the operator. INVENTION CONTENTS

[0007] To address the problems mentioned in the background section, this invention provides a highly reliable forming cylinder. It addresses issues such as unstable structure, inaccurate pressure control, poor sealing and guidance, lack of buffer protection, and inconsistent dimensional standards in traditional forming cylinders. By optimizing the structural design, adding a pressure monitoring and control system, strengthening the sealing and guiding device, and incorporating a buffer structure, the reliability of the cylinder is improved, enabling precise pressure control and stable movement, enhancing forming quality, reducing maintenance costs, and facilitating equipment manufacturing and repair.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a highly reliable shaping cylinder, comprising a cylinder barrel, a piston rod, a piston, an oil hole, a fixing mechanism, and a shaping mechanism. The cylinder barrel is arranged laterally, with a cylinder bottom at its right end and a cylinder cover at its left end. The fixing mechanism is connected to the right end of the cylinder bottom for connecting external components to fix the cylinder barrel. The piston rod is disposed on the inner circumference of the cylinder barrel and the cylinder cover and can move left and right relative to the cylinder barrel. The piston is disposed on the right end of the piston rod, and the shaping mechanism is disposed on the left end of the piston rod for shaping external components under the transmission action of the piston rod. The oil hole includes a first oil hole located at the right end of the cylinder cover, penetrating the cylinder barrel and communicating with its inner circumference, and a second oil hole penetrating the cylinder bottom and communicating with the inner circumference of the cylinder barrel. The first oil hole and the second oil hole cooperate to allow hydraulic oil to enter and exit the inner circumference of the cylinder barrel, so that the piston rod can move left and right relative to the cylinder barrel.

[0009] As a further explanation of this technical solution:

[0010] Preferably, the cylinder head is a T-shaped cylinder with a hollow inner circumference, fixed to the outer circumference of the left end of the cylinder by a first screw, and extends to the left to fit against the inner circumference of the cylinder. The cylinder bottom is welded to the right end of the cylinder, and the cylinder bottom and the fixing mechanism are an integral structure.

[0011] Preferably, the fixing mechanism includes a fixing tab, the left end of which is provided with a fixing connection part, the fixing connection part is connected to the middle part of the cylinder bottom, and the inner circumference of the middle part of the fixing tab is provided with a first through hole with a diameter of 20.0mm to 35.0mm.

[0012] Preferably, the piston rod has a mounting head at its left end. The shaping mechanism includes a shaping connecting part and a shaping tab. The inner circumference of the shaping connecting part is hollow and fits onto the outer circumference of the mounting head. It is fixedly connected to the mounting head by a second screw. The shaping tab and the shaping connecting part are an integral structure located at the left end of the shaping connecting part. The inner circumference of the middle part of the shaping tab has a second through hole with a diameter of 20.0 mm to 35.0 mm.

[0013] Preferably, a control system is further included, and a pipe joint is arranged on each of the fixed lug and the shaping lug, which is used to connect with an external hydraulic control element, and the hydraulic control element can monitor the pressure change inside the oil cylinder in real time through the fixed lug and the shaping lug, feed data back to the control system, and control the first oil hole and the second oil hole to enter or exit the hydraulic oil into the inner wall of the cylinder in real time through the control system, so as to control the shaping lug to reshape the external component.

[0014] Preferably, a first sealing and guiding device is arranged between the outer wall of the piston and the inner wall of the cylinder, which is used to seal and guide the piston, a second sealing and guiding device is arranged between the inner wall of the cylinder head and the piston rod, which is used to guide the piston rod and seal the cylinder head and the piston rod, a first sealing device is arranged between the inner wall of the piston and the piston rod, which is used to cooperate with the first sealing and guiding device to prevent the hydraulic oil entering the inner wall of the cylinder through the second oil hole from seeping into the left through the piston, and a second sealing device is arranged between the outer wall of the cylinder head and the inner wall of the cylinder, which is used to cooperate with the second sealing and guiding device to prevent the hydraulic oil entering the inner wall of the cylinder through the first oil hole from seeping outwards through the cylinder head.

[0015] Preferably, the first sealing and guiding device sequentially includes a first piston sealing ring arranged on the outer wall of the piston and a piston sealing guiding belt from left to right, the first sealing device includes a second piston sealing ring arranged on the inner wall of the piston, the second sealing and guiding device sequentially includes a first piston rod sealing ring, a second piston rod sealing ring, a piston rod supporting ring and a piston rod guiding belt arranged on the inner wall of the cylinder head from left to right, and the second sealing device sequentially includes a first cylinder head sealing ring, a second cylinder head sealing ring and a third cylinder head sealing ring arranged between the outer wall of the cylinder head and the inner wall of the cylinder from left to right.

[0016] Preferably, the left end of the cylinder bottom is provided with a right-recessed buffer hole, and the right end of the piston is provided with a buffer block which is matched with the buffer hole and is used to buffer the piston when the piston rod moves to the right.

[0017] Preferably, the left and right lengths of the cylinder are 178.0mm-188.0mm, the diameter of the outer wall of the cylinder is 45.0mm-55.0mm, the diameter of the inner wall of the cylinder is 38.0mm-42.0mm, the diameter of the piston rod is 20.0mm-24.0mm, the left and right lengths of the piston rod are 145.0mm-155.0mm, the left and right lengths of the piston are 20.0mm-24.0mm, the left and right lengths of the cylinder head are 45.0mm-51.0mm, the left and right lengths between the hole center of the first oil hole and the hole center of the second oil hole are 124.0mm-130.0mm, the left and right lengths of the mounting head are 28.0mm-32.0mm, and the left and right lengths from the hole center of the first through hole to the cylinder bottom are 22.0mm-26.0mm.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] First, the utility model discloses a unique structure design, greatly promote the overall stability and reliability.Cylinder cover adopts the hollow cylinder T type structure of the inner periphery, with the help of the first screw is fixed firmly in the left end outer periphery of cylinder barrel, and extends left closely to the inner periphery of cylinder barrel, the stability of the connection of cylinder cover and cylinder barrel is strengthened, effectively disperses the stress of work, reduces the possibility of loosening at the joint.Cylinder bottom and fixed mechanism adopt integral structure and are welded to the right end of cylinder barrel, further strengthen the overall structure strength of oil cylinder.Compared with the ordinary connection mode of traditional oil cylinder, the structure design of the utility model greatly reduces the probability of failure caused by structure problem, ensures the stable operation of oil cylinder under long time, high load working condition, reduces the equipment maintenance frequency and downtime, improves production efficiency.

[0020] Second, the utility model pressure precision control, guarantee the quality of shaping, the control system and pipe joint of equipment work cooperatively, realize the precise monitoring and regulation and control to the pressure in the oil cylinder.Pipe joint set up on fixed lug and shaping lug can be connected with external hydraulic control element, these elements can collect the pressure data in the oil cylinder in real time and feed back to the control system quickly.The control system accurately regulates and controls the flow and pressure of hydraulic oil that the first oil hole and the second oil hole import and export to the inner periphery of cylinder barrel according to the preset shaping process requirement, so that the stable pressure that meets the requirement can be applied to the shaping lug when it is shaping external components, effectively solve the problem of inaccurate pressure control of traditional shaping oil cylinder, significantly improve the precision and quality of shaping, make the size precision of processed product higher and the shape consistency better, meet the stringent requirements of high-end manufacturing industry on shaping process.

[0021] Third, the utility model has good sealing and guiding, can improve the working stability, the first sealing and guiding device that is set up between the outer periphery of piston and the inner periphery of cylinder barrel, including first piston sealing ring and piston sealing guiding belt, can effectively prevent hydraulic oil leakage, and can provide accurate guidance when the piston moves, ensure that the piston moves stably.The first sealing device between the inner periphery of piston and piston rod, and the second sealing and guiding device between the inner periphery of cylinder cover and piston rod, and the second sealing device between the outer periphery of cylinder cover and the inner periphery of cylinder barrel, jointly build a comprehensive sealing system, effectively prevent the leakage of hydraulic oil, maintain the stability of the internal pressure of oil cylinder.At the same time, the piston rod support ring and piston rod guiding belt in the second sealing and guiding device and other components further enhance the guiding effect of the movement of piston rod, ensure the straightness and stability of piston rod in the movement process.The cooperative work of these sealing and guiding devices effectively improves the working stability of oil cylinder, reduces the failure caused by hydraulic oil leakage and movement component deviation, prolongs the service life of oil cylinder.

[0022] Fourthly, the buffer hole arranged at the cylinder bottom is matched with the buffer block at the right end of the piston, and reliable buffer protection is provided for the oil cylinder. When the piston rod moves to the right, the buffer block gradually enters the buffer hole, the resistance of the buffer hole to the buffer block gradually increases, so that the movement speed of the piston is smoothly slowed down, and direct rigid collision of the piston and the cylinder bottom is avoided. The impact force in the movement process is effectively reduced, the damage to the piston, the cylinder bottom and other internal components is reduced, the service life of each component of the oil cylinder is greatly prolonged, the component replacement frequency is reduced, the maintenance cost is reduced, the stability of the oil cylinder work is improved, and the quality of the shaping product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification, and are used to explain the present utility model together with embodiments of the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0024] Figure 1 It is a first angle overall structure schematic view of the present utility model;

[0025] Figure 2 It is Figure 1 It is a part A enlarged structure schematic view;

[0026] Figure 3 It is Figure 1 It is a part B enlarged structure schematic view;

[0027] Figure 4 It is a second angle overall structure schematic view of the present utility model.

[0028] In the drawing: 1, cylinder barrel;2, piston rod;3, piston;4, first oil hole;5, second oil hole;6, cylinder bottom;7, cylinder cover;8, fixed lug;9, fixed connection part;10, mounting head;11, shaping connection part;12, shaping lug;13, second screw;14, pipe joint;15, first piston sealing ring;16, piston sealing guide belt;17, second piston sealing ring;18, first piston rod sealing ring;19, second piston rod sealing ring;20, piston rod support ring;21, piston rod guide belt;22, first cylinder cover sealing ring;23, second cylinder cover sealing ring;24, third cylinder cover sealing ring;25, buffer block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0030] As shown in Figures 1-4 , a high-reliability shaping oil cylinder comprises a cylinder 1, a piston rod 2, a piston 3, an oil hole, a fixing mechanism and a shaping mechanism, the cylinder 1 is arranged horizontally, a cylinder bottom 6 is arranged at the right end of the cylinder 1, a cylinder cover 7 is arranged at the left end of the cylinder 1, the fixing mechanism is connected to the right end of the cylinder bottom 6, used for connecting external components to fix the cylinder 1, the piston rod 2 is arranged at the inner periphery of the cylinder 1 and the cylinder cover 7 and can move left and right relative to the cylinder 1, the piston 3 is arranged at the right end of the piston rod 2, the shaping mechanism is arranged at the left end of the piston rod 2 and used for shaping external components under the driving of the piston rod 2, the oil hole comprises a first oil hole 4 arranged at the right end of the cylinder cover 7 and penetrating the cylinder 1 to communicate with the inner periphery of the cylinder 1 and a second oil hole 5 penetrating the cylinder bottom 6 to communicate with the inner periphery of the cylinder 1, the first oil hole 4 and the second oil hole 5 cooperate to make hydraulic oil enter and exit the inner periphery of the cylinder 1, so that the piston rod 2 moves left and right relative to the cylinder 1.

[0031] As shown in Figure 1 , Figure 2 , Figure 4 , the cylinder cover 7 is a hollow cylindrical T-shaped structure, fixed to the outer periphery of the left end of the cylinder 1 by a first screw (not shown in the figure) and extends leftward to fit the inner periphery of the cylinder 1, the cylinder bottom 6 is welded to the right end of the cylinder 1, and the cylinder bottom 6 and the fixing mechanism are integrated.

[0032] As shown in Figure 1 , Figure 4 , the fixing mechanism comprises a fixing lug 8, the left end of the fixing lug 8 is provided with a fixing connecting part 9, the fixing connecting part 9 is connected to the middle part of the cylinder bottom 6, and the middle inner periphery of the fixing lug 8 is provided with a first through hole with a diameter of 20.0mm-35.0mm. In this embodiment, the diameter of the first through hole is 28.0mm.

[0033] As shown in Figure 1 , Figure 4 , the left end of the piston rod 2 is provided with a mounting head 10, the shaping mechanism comprises a shaping connecting part 11 and a shaping lug 12, the inner periphery of the shaping connecting part 11 is hollow, sleeved on the outer periphery of the mounting head 10 and fixedly connected to the mounting head 10 by a second screw 13, the shaping lug 12 and the shaping connecting part 11 are integrated and located at the left end of the shaping connecting part 11, and the middle inner periphery of the shaping lug 12 is provided with a second through hole with a diameter of 20.0mm-35.0mm. In this embodiment, the diameter of the first through hole is 23.5mm.

[0034] As shown in Figure 1As shown, it also includes a control system (not shown in the figure). Both the fixed electrode 8 and the shaping electrode 12 are provided with pipe joints 14. The pipe joints 14 are used to connect to external hydraulic control components. The hydraulic control components can monitor the internal pressure changes of the oil cylinder in real time through the fixed electrode 8 and the shaping electrode 12, feed the data back to the control system, and adjust the first oil hole 4 and the second oil hole 5 to allow hydraulic oil to enter and exit the inner circumference of the cylinder 1 in real time through the control system, so as to control the shaping electrode 12 to shape the external components.

[0035] like Figures 1-3 As shown, a first sealing and guiding device is provided between the outer circumference of the piston 3 and the inner circumference of the cylinder 1, which is used to seal the piston 3 and the cylinder 1 and guide the piston 3. A second sealing and guiding device is provided between the inner circumference of the cylinder head 7 and the piston rod 2, which is used to guide the piston rod 2 and seal the cylinder head 7 and the piston rod 2. The first sealing device is provided between the inner circumference of the piston 3 and the piston rod 2, which cooperates with the first sealing and guiding device to prevent the hydraulic oil entering the inner circumference of the cylinder 1 through the second oil hole 5 from seeping to the left through the piston 3. The second sealing device is provided between the outer circumference of the cylinder head 7 and the inner circumference of the cylinder 1, which cooperates with the second sealing and guiding device to prevent the hydraulic oil entering the inner circumference of the cylinder 1 through the first oil hole 4 from seeping out through the cylinder head 7.

[0036] Furthermore, the first sealing guide device includes, from left to right, a first piston sealing ring 15 and a piston sealing guide strip 16 disposed on the outer periphery of the piston 3; the first sealing device includes a second piston sealing ring 17 disposed on the inner periphery of the piston 3; the second sealing guide device includes, from left to right, a first piston rod sealing ring 18, a second piston rod sealing ring 19, a piston rod support ring 20 and a piston rod guide strip 21 disposed on the inner periphery of the cylinder head 7; and the second sealing device includes, from left to right, a first cylinder head sealing ring 22, a second cylinder head sealing ring 23 and a third cylinder head sealing ring 24 disposed between the outer periphery of the cylinder head 7 and the inner periphery of the cylinder barrel 1.

[0037] like Figure 1 , Figure 3 As shown, the left end of the cylinder bottom 6 is provided with a buffer hole that is recessed to the right, and the right end of the piston 3 is provided with a buffer block 25, the shape of which matches the buffer hole, for buffering the piston 3 when the piston rod 2 moves to the right.

[0038] Further, the cylinder 1 has a length of 178.0mm-188.0mm, the outer diameter of the cylinder 1 is 45.0mm-55.0mm, the inner diameter of the cylinder 1 is 38.0mm-42.0mm, the diameter of the piston rod 2 is 20.0mm-24.0mm, the length of the piston rod 2 is 145.0mm-155.0mm, the length of the piston 3 is 20.0mm-24.0mm, the length of the cylinder cover 7 is 45.0mm-51.0mm, the length between the center of the first oil hole 4 and the center of the second oil hole 5 is 124.0mm-130.0mm, the length of the mounting head 10 is 28.0mm-32.0mm, and the length from the center of the first through hole to the cylinder bottom 6 is 22.0mm-26.0mm. In the embodiment, the length of the cylinder 1 is 183.0mm, the outer diameter of the cylinder 1 is 50.0mm, the inner diameter of the cylinder 1 is 40.0mm, the diameter of the piston rod 2 is 22.0mm, the length of the piston rod 2 is 150.0mm, the length of the piston 3 is 22.0mm, the length of the cylinder cover 7 is 48.0mm, the length between the center of the first oil hole 4 and the center of the second oil hole 5 is 128.0mm, the length of the mounting head 10 is 30.0mm, and the length from the center of the first through hole to the cylinder bottom 6 is 24.0mm.

[0039] In the description of the present application, it should be understood that the terms "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-reliability shaping oil cylinder characterized by comprising: The application relates to a hydraulic cylinder, which comprises a cylinder barrel, a piston rod, a piston, oil holes, a fixing mechanism and a shaping mechanism, wherein the cylinder barrel is arranged horizontally, the right end of the cylinder barrel is provided with a cylinder bottom, the left end of the cylinder barrel is provided with a cylinder cover, the right end of the cylinder bottom is connected with the fixing mechanism, the fixing mechanism is used for connecting external components to fix the cylinder barrel, the piston rod is arranged in the inner periphery of the cylinder barrel and the cylinder cover and can move leftward and rightward relative to the cylinder barrel, the piston is arranged at the right end of the piston rod, the left end of the piston rod is provided with the shaping mechanism, the shaping mechanism is used for shaping external components under the transmission of the piston rod, the oil holes comprise first oil holes which are arranged at the right end of the cylinder cover and penetrate the cylinder barrel to communicate with the inner periphery of the cylinder barrel and second oil holes which penetrate the cylinder bottom to communicate with the inner periphery of the cylinder barrel, the first oil holes and the second oil holes are matched with each other to make hydraulic oil enter and exit the inner periphery of the cylinder barrel, and the piston rod moves leftward and rightward relative to the cylinder barrel.

2. The high-reliability shapmg oil cylinder according to claim 1, characterized by: The cylinder cover is a hollow cylindrical T-shaped structure, is fixed to the outer periphery of the left end of the cylinder barrel through a first screw and extends leftward to be matched with the inner periphery of the cylinder barrel, and the cylinder bottom is welded to the right end of the cylinder barrel and is an integral structure with the fixing mechanism.

3. The high-reliability shapmg oil cylinder according to claim 2, characterized by: The fixing mechanism comprises a fixing lug, the left end of the fixing lug is provided with a fixing connecting part, the fixing connecting part is connected to the middle part of the cylinder bottom, and the middle part of the fixing lug is provided with a first through hole with a diameter of 20.0mm-35.0mm.

4. The high-reliability shapmg oil cylinder according to claim 3, characterized by: The left end of the piston rod is provided with a mounting head, the shaping mechanism comprises a shaping connecting part and a shaping lug, the inner periphery of the shaping connecting part is hollow, is sleeved with the outer periphery of the mounting head and is fixedly connected with the mounting head through a second screw, the shaping lug and the shaping connecting part are an integral structure, are located at the left end of the shaping connecting part, and the middle part of the shaping lug is provided with a second through hole with a diameter of 20.0mm-35.0mm.

5. The high-reliability shapmg oil cylinder according to claim 4, characterized by: The fixing lug and the shaping lug are both provided with a pipe joint, the pipe joint is used for being connected with an external hydraulic control element, the hydraulic control element can monitor the pressure change in the hydraulic cylinder in real time through the fixing lug and the shaping lug, feeds back data to a control system, and controls the first oil holes and the second oil holes to make hydraulic oil enter and exit the inner periphery of the cylinder barrel in real time through the control system so as to control the shaping lug to shape external components.

6. The high-reliability shapmg oil cylinder according to claim 5, characterized by: A first sealing and guiding device is arranged between the outer periphery of the piston and the inner periphery of the cylinder barrel and is used for sealing the piston and the cylinder barrel and guiding the piston, a second sealing and guiding device is arranged between the inner periphery of the cylinder cover and the piston rod and is used for guiding the piston rod and sealing the cylinder cover and the piston rod, a first sealing device is arranged between the inner periphery of the piston and the piston rod and is used for cooperating with the first sealing and guiding device to prevent the hydraulic oil in the second oil holes from penetrating into the left end of the cylinder barrel through the piston, and a second sealing device is arranged between the outer periphery of the cylinder cover and the inner periphery of the cylinder barrel and is used for cooperating with the second sealing and guiding device to prevent the hydraulic oil in the first oil holes from penetrating out of the cylinder barrel through the cylinder cover.

7. The high-reliability shapmg oil cylinder according to claim 6, characterized by: The first sealing guide device comprises a first piston sealing ring arranged on the outer periphery of the piston and a piston sealing guide belt from left to right, and the first sealing device comprises a second piston sealing ring arranged on the inner periphery of the piston, the second sealing guide device comprises a first piston rod sealing ring, a second piston rod sealing ring, a piston rod support ring and a piston rod guide belt from left to right, and the second sealing device comprises a first cylinder cover sealing ring, a second cylinder cover sealing ring and a third cylinder cover sealing ring arranged between the outer periphery of the cylinder cover and the inner periphery of the cylinder barrel from left to right.

8. The high-reliability shapmg oil cylinder according to claim 7, characterized by: The left end of the cylinder bottom is provided with a rightward recessed buffer hole, and the right end of the piston is provided with a buffer block matching the shape of the buffer hole for buffering the piston when the piston rod moves rightward.

9. The high-reliability shapmg oil cylinder according to any one of claims 4 to 8, characterized by: The left and right lengths of the cylinder barrel are 178.0mm-188.0mm, the diameter of the outer periphery of the cylinder barrel is 45.0mm-55.0mm, the diameter of the inner periphery of the cylinder barrel is 38.0mm-42.0mm, the diameter of the piston rod is 20.0mm-24.0mm, the left and right lengths of the piston rod are 145.0mm-155.0mm, the left and right lengths of the piston are 20.0mm-24.0mm, the left and right lengths of the cylinder cover are 45.0mm-51.0mm, the left and right lengths between the hole center of the first oil hole and the hole center of the second oil hole are 124.0mm-130.0mm, the left and right lengths of the mounting head are 28.0mm-32.0mm, and the left and right lengths from the hole center of the first through hole to the cylinder bottom are 22.0mm-26.0mm.

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