Piston structure

Abstract

The utility model discloses a piston structure, which relates to the technical field of fluid pressure actuating mechanisms and comprises a piston rod arranged in a cylinder barrel, positioning blocks arranged at two ends of the piston rod, a piston arranged between the cylinder barrel and the piston rod, a groove arranged on the piston rod, and a first support ring and a second support ring arranged on one side of the piston close to the cylinder barrel. According to the piston structure, the steel balls are arranged at the connecting positions, the steel balls can slightly rotate in the reciprocating motion of the piston, stress generated in the reciprocating motion is eliminated, and the piston structure is better in performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid pressure actuating mechanism technical field, especially a piston structure. BACKGROUND

[0002] At present, the fixing mode of the oil cylinder piston and the piston rod mostly adopts thread fixing, which is simple to operate and is widely used in hydraulic cylinders, but the processing time of the thread is long, and the size of the end of the piston rod is changed after processing, thereby changing the strength of the end of the piston rod, and the hydraulic cylinder is prone to fracture after long working time, and the thread fixing needs to be rotated into, and the time is needed for mounting and dismounting, if the working environment is poor, the thread is deformed, and the difficulty is greatly increased when dismounting.

[0003] In the prior art, the patent with the publication number CN201851455U discloses an anti-loose type fixing structure of an oil cylinder piston and a piston rod, the piston is installed at the head of the piston rod, the piston is located inside the cylinder wall, a through hole is drilled on the piston, a thread is processed in the through hole, a screw is installed in the hole, a support ring is installed in the through hole at the outer end of the screw, the support ring plays the role of support and friction, the screw is supported on the support ring, the inner end of the screw is abutted on the piston rod, and a pit or a groove is arranged at the corresponding position of the piston rod, and the inner end of the screw is tightly abutted in the pit or the groove, the contrast technology adopts the traditional screw to fix the piston rod, and the mounting and dismounting time is long, and the overall strength is low. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of piston structures, including cylinder, cylinder is equipped with piston rod, the both ends of piston rod are positioning block, cylinder and piston rod are equipped with piston, recess is equipped on piston rod, first support ring and second support ring are arranged on the side of piston close to cylinder, fastener is connected below second support ring, steel ball is fixed between fastener and recess.

[0005] The utility model discloses a kind of piston structures, including cylinder, cylinder is equipped with piston rod, the both ends of piston rod are positioning block, cylinder and piston rod are equipped with piston, recess is equipped on piston rod, first support ring and second support ring are arranged on the side of piston close to cylinder, fastener is connected below second support ring, steel ball is fixed between fastener and recess.

[0006] The utility model discloses a kind of piston structures, including cylinder, cylinder is equipped with piston rod, the both ends of piston rod are positioning block, cylinder and piston rod are equipped with piston, recess is equipped on piston rod, first support ring and second support ring are arranged on the side of piston close to cylinder, fastener is connected below second support ring, steel ball is fixed between fastener and recess.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of piston structure, including cylinder, cylinder is equipped with piston rod, the both ends of piston rod are positioning block, cylinder and piston rod are equipped with piston, recess is equipped on piston rod, first support ring and second support ring are arranged on the side of piston close to cylinder, fastener is connected below second support ring, steel ball is fixed between fastener and recess.

[0008] As preferred, one end of the fastener is provided with an inner groove, the inner groove is a threaded groove, the fastener is a flat end screw, and the steel ball is embedded in the threaded groove.

[0009] As preferred, a plurality of sealing rings are arranged at the position where the positioning block is connected to the cylinder barrel, and a leather cup is arranged at the position where the positioning block is connected to the piston rod.

[0010] As preferred, the diameter of the inner groove is slightly larger than the diameter of the steel ball.

[0011] As preferred, the recess is arranged at the middle part of the piston rod, and the recess is in a strip shape.

[0012] As preferred, the diameter of the recess is slightly smaller than the diameter of the steel ball.

[0013] As preferred, the second sealing ring is arranged at one end close to the cylinder barrel and is located between the first support ring and the second support ring.

[0014] As preferred, the first sealing ring is arranged at the side of the piston close to the piston rod.

[0015] As preferred, the first sealing ring is opposite to the first support ring.

[0016] As preferred, the piston is in a strip shape.

[0017] Compared with the prior art, the utility model has the beneficial effects that: the utility model fixes the piston and the piston rod by pressing the steel ball, without the need of threaded connection, avoids weakening of the strength of the piston rod caused by threaded processing, significantly enhances the strength and durability of the piston rod, prolongs the service life, and ensures stable and reliable operation under complex working conditions.

[0018] The utility model does not need to process threads, simplifies the processing technology of the piston rod, reduces the use of processes and tool fixtures, reduces the error rate in the processing process, greatly shortens the processing time, effectively reduces the time and processing cost, improves the production efficiency, is especially suitable for large-scale industrialized production, helps enterprises to control cost and improve economic benefits.

[0019] The utility model adopts the pressing steel ball fixing structure, makes the dismounting and mounting of the piston become convenient and rapid, greatly reduces the time and energy required for dismounting and mounting. At the same time, the replacement of subsequent sealing members and the overhaul and maintenance of other components are facilitated, the maintenance efficiency of the equipment is improved, the downtime is reduced, the equipment is ensured to quickly recover operation, the continuity and stability of the overall production process are enhanced. DRAWINGS

[0020] Fig. 1 It is a schematic view of the main structure of the utility model.

[0021] Fig. 2 It is an enlarged view of the local structure of the utility model.

[0022] Fig. 3 Figure D is an enlarged view of a partial structure of the utility model.

[0023] In the figure: 1, piston rod; 2, cylinder barrel; 21, positioning block; 22, leather cup; 3, first sealing ring; 4, first support ring; 5, second sealing ring; 6, second support ring; 7, fastener; 8, inner groove; 9, groove; 10, steel ball; 11, piston. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further described in detail below through specific embodiments, and the described embodiments are only part of the embodiments of the utility model, not all.

[0025] Embodiment 1: Refer to Figs. 1-3 In hydraulic and pneumatic systems, the piston structure is one of the key components to ensure stable operation of the equipment. The design directly affects the sealing performance, carrying capacity and service life of the system. This paper will describe an innovative piston structure in detail, which realizes efficient and reliable piston fixing effect through clever component combination and size design.

[0026] The piston structure in this embodiment mainly consists of cylinder barrel 2, piston rod 1, piston 11, groove 9, first support ring 4, second support ring 6, fastener 7 and steel ball 10. The cylinder barrel 2 provides a guide rail for the reciprocating motion of the piston. In this embodiment, the cylinder barrel 2 is made of high-strength alloy steel, and the inner wall is finely honed to have extremely low surface roughness, ensuring that the frictional resistance experienced by the piston during movement is minimized, while improving the wear resistance and corrosion resistance of the cylinder barrel. The piston rod 1 is made of high-quality carbon steel and is quenched and tempered to enhance its surface hardness and core toughness. The diameter of the piston rod 1 is accurately matched with the inner diameter of the cylinder barrel to ensure good sealing and stable support between the two. The length of the piston rod 1 is customized according to the requirements of specific application scenarios to meet different stroke requirements. The two ends of the piston rod 1 are provided with positioning blocks 21, and the positioning blocks 21 are connected to the cylinder barrel 2 and provided with a plurality of sealing rings. The position where the positioning block 21 is connected to the piston rod 1 is provided with a leather cup 22 to fix the piston rod from both ends, making the entire structure more stable.

[0027] In this embodiment, the piston is made of lightweight aluminum alloy material, which has good thermal conductivity and corrosion resistance, and at the same time reduces the overall weight of the system, which helps to improve the response speed of the equipment.

[0028] The first support ring 4 and the second support ring 6 are arranged on the side of the piston close to the cylinder barrel. These two support rings are made of polytetrafluoroethylene (PTFE) material, which has excellent self-lubricating properties and wear resistance. The main function of the first support ring and the second support ring is to provide additional support to the piston, ensuring that the piston maintains good contact with the inner wall of the cylinder barrel during movement, preventing the piston from tilting or deviating, thereby improving the stability and sealing performance of the system.

[0029] A groove 9 is arranged on the piston rod 1, which is located in the middle of the piston rod 1 and designed in a long strip shape. This long strip-shaped groove design can provide a larger contact area, which is beneficial to the stable embedding and uniform stress of the steel ball 10. The size of the groove is accurately calculated, and its diameter is slightly smaller than the diameter of the steel ball, ensuring that the steel ball is neither loose nor tightly fixed in the groove.

[0030] The fastener 7 in this embodiment is a flat-end screw, which has an inner groove 8 at one end. The inner groove is a threaded groove. The design of the threaded groove allows the fastener to form a threaded connection with the steel ball 10. By rotating the fastener, the position and tightness of the steel ball in the groove can be accurately adjusted. The diameter of the inner groove is slightly larger than the diameter of the steel ball, which ensures that the steel ball can be smoothly embedded in the threaded groove, and avoids the steel ball from shaking or deviating during installation due to the inner groove being too large.

[0031] The steel ball 10 is a key component connecting the piston rod and the piston. It is made of high-hardness alloy steel and has undergone precise machining and heat treatment to ensure good wear resistance and compression strength. The diameter of the steel ball matches the size of the groove and the inner groove, and it is firmly fixed in the groove through the threaded connection of the fastener, thereby achieving reliable connection between the piston and the piston rod.

[0032] In a hydraulic or pneumatic system, the piston rod 1 moves linearly in the cylinder barrel 2. Since the piston 11 is tightly connected to the piston rod through the steel ball 10 and the fastener 7, the piston moves synchronously with the piston rod in the cylinder barrel. The first support ring 4 and the second support ring 6 provide stable lateral support to the piston during movement, preventing the piston from tilting or jamming due to lateral pressure. At the same time, the tight fit between the steel ball and the groove ensures the connection strength between the piston and the piston rod, which can withstand large axial force and impact load.

[0033] Through the double support of the first support ring and the second support ring, and the tight fit between the steel ball and the groove, the leakage of hydraulic oil or gas is effectively prevented, and the sealing performance and working efficiency of the system are improved. The components are made of high-quality materials and have undergone fine machining, which has excellent wear resistance and corrosion resistance, can adapt to harsh working environments, and prolong the service life of the equipment.

[0034] The stable connection and precise guidance between the piston and the piston rod ensure the straightness and stability of the piston during movement, improving the motion accuracy and response speed of the system. The threaded connection design of the fastener makes the installation and removal of the steel ball simple and convenient, facilitating operation during equipment maintenance or component replacement, reducing maintenance costs and downtime.

[0035] The piston structure can be widely applied in various hydraulic and pneumatic devices, such as hydraulic cylinders, air cylinders, hydraulic pumps, and compressors. In actual applications, the structure can be appropriately adjusted and optimized according to the specific requirements of different devices. For example, in high-pressure environments, the performance of the sealing system can be further enhanced by increasing the number of sealing rings or using higher-performance sealing materials; in high-speed motion scenarios, the surfaces of the piston and piston rod can be specially treated to reduce frictional resistance and improve heat dissipation performance.

[0036] In addition, with the continuous development of industrial technology, the piston structure can also be combined with other advanced technologies, such as intelligent monitoring systems. By installing sensors on the piston, the position, speed, pressure, and other parameters of the piston can be monitored in real time, and the data can be transmitted to the control system to achieve precise control and fault warning of the hydraulic or pneumatic system, further improving the intelligent level and operational reliability of the equipment.

[0037] In summary, the piston structure described in this embodiment provides an innovative and practical solution for the technical development of the hydraulic and pneumatic fields with its exquisite design, outstanding performance, and wide application prospects.

[0038] Embodiment 2: Refer to Figs. 1-3 The piston structure in this embodiment mainly consists of a cylinder barrel 2, a piston rod 1, a piston 11, a groove 9, a first support ring 4, a second support ring 6, a fastener 7, and a steel ball 10. These components work together to build a stable and efficient piston fixing system.

[0039] The cylinder barrel provides a precise guide rail for the reciprocating motion of the piston. In this embodiment, the cylinder barrel is made of high-strength alloy steel, and the inner wall is finely honed to have extremely low surface roughness, ensuring that the frictional resistance experienced by the piston during movement is minimized, while improving the wear resistance and corrosion resistance of the cylinder barrel. The piston rod is made of high-quality carbon steel and is subjected to quenching and tempering treatment to enhance its surface hardness and core toughness. The diameter of the piston rod is precisely matched with the inner diameter of the cylinder barrel to ensure good sealing and stable support between the two. The length of the piston rod is customized according to the requirements of specific application scenarios to meet different stroke requirements.

[0040] In this embodiment, the piston is made of lightweight aluminum alloy material, which has good thermal conductivity and corrosion resistance, while reducing the overall weight of the system, which helps to improve the response speed of the equipment.

[0041] The first support ring 4 and the second support ring 6 are arranged on the side of the piston close to the cylinder barrel. These two support rings are made of polytetrafluoroethylene (PTFE) material, which has excellent self-lubricating properties and wear resistance. The main function of the first support ring and the second support ring is to provide additional support force for the piston, ensuring that the piston always maintains good contact with the inner wall of the cylinder barrel during movement, preventing the piston from tilting or deviating, thereby improving the stability and sealing performance of the system.

[0042] A groove 9 is arranged on the piston rod 1, which is located in the middle of the piston rod and designed in a long strip shape. This long strip-shaped groove design can provide a larger contact area, which is beneficial for the stable embedding and uniform stress of the steel ball 10. The size of the groove is accurately calculated, with a diameter slightly smaller than that of the steel ball, ensuring that the steel ball is neither loose nor tightly fixed in the groove.

[0043] The fastener 7 in this embodiment is a flat-end screw, which has an inner groove 8 at one end. The inner groove is a threaded groove. The design of the threaded groove allows the fastener to form a threaded connection with the steel ball 10. By rotating the fastener, the position and tightness of the steel ball in the groove can be accurately adjusted. The diameter of the inner groove is slightly larger than that of the steel ball, which ensures that the steel ball can be smoothly embedded in the threaded groove, and avoids the steel ball from shaking or deviating during installation due to the inner groove being too large.

[0044] The steel ball 10 connects the piston rod and the piston, and is made of high-hardness alloy steel. After precise machining and heat treatment, it ensures good wear resistance and compression strength. The diameter of the steel ball matches the size of the groove and the inner groove, and is firmly fixed in the groove through the threaded connection of the fastener, thereby realizing reliable connection between the piston and the piston rod.

[0045] When the hydraulic or pneumatic system is running, the piston rod 1 moves linearly in the cylinder barrel 2. Since the piston 11 is tightly connected with the piston rod through the steel ball 10 and the fastener 7, the piston moves synchronously with the piston rod in the cylinder barrel. The first support ring 4 and the second support ring 6 provide stable lateral support force for the piston during movement, preventing the piston from tilting or jamming due to lateral pressure. At the same time, the tight fit of the steel ball and the groove ensures the connection strength between the piston and the piston rod, which can withstand large axial force and impact load. Through the double support of the first support ring and the second support ring, and the tight fit of the steel ball and the groove, the leakage of hydraulic oil or gas is effectively prevented, and the sealing performance and working efficiency of the system are improved.

[0046] The piston structure can be widely applied in various hydraulic and pneumatic devices, such as hydraulic cylinders, air cylinders, hydraulic pumps, compressors, etc. In practical applications, the structure can be properly adjusted and optimized according to the specific requirements of different devices. For example, in a high-pressure environment, the performance of the sealing system can be further enhanced, the number of sealing rings can be increased, or higher-performance sealing materials can be used; in a high-speed motion scenario, the surfaces of the piston and the piston rod can be specially treated to reduce frictional resistance and improve heat dissipation performance.

[0047] With the continuous development of industrial technology, the piston structure can also be combined with other advanced technologies, such as an intelligent monitoring system. By installing sensors on the piston, the position, speed, pressure, and other parameters of the piston can be monitored in real time, and the data can be transmitted to the control system to achieve precise control and fault warning of the hydraulic or pneumatic system, further improving the intelligent level and operation reliability of the equipment.

[0048] The first sealing ring 3 is arranged on the side of the piston 11 close to the piston rod 1. This design can effectively prevent fluid leakage from the gap between the piston and the cylinder wall, thereby improving the efficiency and reliability of the entire hydraulic or pneumatic system. The first sealing ring 3 can be made of materials with good elasticity and wear resistance, such as rubber or polyurethane, to ensure good sealing performance during long-term operation.

[0049] The first sealing ring 3 is opposite to the first support ring 4. The main function of the first support ring 4 is to support and protect the first sealing ring 3, preventing the sealing ring from being deformed or damaged excessively in a high-pressure environment. The first support ring 4 is usually made of materials with high hardness but smooth surfaces, such as metal or hard plastic, and its shape matches the sealing ring, tightly adhering to the outside of the sealing ring to evenly distribute pressure, thereby prolonging the service life of the sealing ring and improving the stability and safety of the system.

[0050] The piston 11 has a long strip structure. This long strip design makes the piston have better guidance and stability in the cylinder, effectively reducing the shaking and deviation of the piston during movement, thereby ensuring that the sealing effect between the piston and the cylinder wall is more uniform and reliable. In addition, the long strip structure can also increase the effective working area of the piston, improve the output force or torque of the system, and be suitable for some applications that require high output power. At the same time, this structure is also conducive to the installation and disassembly of the piston, facilitating operation during maintenance or replacement of parts.

[0051] For those skilled in the art, the present utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present utility model.

Claims

1. A piston structure characterized by, The piston rod is provided with a recess, a first supporting ring and a second supporting ring are arranged on the side of the piston close to the cylinder barrel, a fastener is connected below the second supporting ring, and a steel ball is fixed between the fastener and the recess.

2. A piston structure according to claim 1, wherein One end of the fastener is provided with an inner groove, the inner groove is a threaded groove, the fastener is a flat-end screw, and the steel ball is embedded in the threaded groove.

3. A piston structure according to claim 1, wherein A plurality of sealing rings are arranged at the position where the positioning block is connected to the cylinder barrel, and a leather cup is arranged at the position where the positioning block is connected to the piston rod.

4. A piston structure according to claim 2, wherein The diameter of the inner groove is slightly larger than the diameter of the steel ball.

5. A piston structure according to claim 1 or 4, wherein The recess is arranged at the middle part of the piston rod, and the recess is in a strip shape.

6. A piston structure according to claim 1 or 4, wherein The diameter of the recess is slightly smaller than the diameter of the steel ball.

7. A piston structure according to claim 5, wherein The second sealing ring is arranged at one end close to the cylinder barrel and is located between the first supporting ring and the second supporting ring.

8. A piston structure according to claim 1 or 7, wherein The side of the piston close to the piston rod is provided with a first sealing ring.

9. A piston structure according to claim 8, wherein The first sealing ring is opposite to the first supporting ring.

10. A piston structure according to claim 1 or 9, wherein The piston is in a strip shape.

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