Self-adaptive pressure adjusting holding cylinder

Abstract

The utility model discloses a self-adaption pressure adjusting holding cylinder which comprises a cylinder body, a throttling valve element is arranged in the center of the interior of the cylinder body, springs are arranged on the two sides of the throttling valve element, a gland is arranged above the throttling valve element, an upper end cover is arranged above the gland, a piston mechanism is arranged below the throttling valve element, and the piston mechanism is arranged below the upper end cover. A piston rod is arranged below the piston mechanism, a lower end cover is arranged below the piston rod, a sealing end cover is arranged on one side of the lower end cover, a piston sealing layer is arranged in the sealing end cover, a combined sealing layer is arranged on one side of the piston sealing layer, and an adjusting mechanism is arranged on the other side of the piston sealing layer. A displacement sensing probe is arranged on one side of the adjusting mechanism, the combined seal is extruded through the piston seal to adjust the gap of the combined seal, excessive consumption of hydraulic power is avoided, energy consumption is reduced accordingly, displacement changes are monitored in real time through a high-precision displacement sensor, abnormal conditions can be found in time, and equipment faults are prevented.

Description

Technical Field

[0001] The utility model relates to the field of clamping cylinders, and more specifically, to an adaptive pressure regulating clamping cylinder. Background Art

[0002] In the existing commonly used traditional clamping cylinders, once the pressure value is set, it cannot be dynamically adjusted according to the actual working conditions, which may cause damage to the workpiece or unstable clamping.

[0003] After retrieval, the existing patent (publication number: CN207131665U) discloses a clamping cylinder structure, including a body and a sleeve fixed inside the body. Two vertically symmetric clamping pieces are arranged inside the sleeve. The lower ends of the clamping pieces abut against each other and can rotate relative to each other. A locking spring capable of pushing the clamping pieces inward is arranged inside the body. A piston capable of sliding up and down is arranged above the clamping pieces in the sleeve. An unlocking protrusion capable of pushing the two clamping pieces outward is arranged at the bottom of the piston. A step for limiting the lower dead point of the piston stroke is arranged on the inner side wall of the sleeve. The utility model aims to provide a clamping cylinder structure that can effectively prevent the clamping pieces from being locked. The inventor found the following problems in the prior art during the implementation of the utility model:

[0004] The operator of the existing clamping cylinder needs to preset a fixed pressure value in advance. This setting method cannot adapt to the slight changes in the workpiece size or the differences in material properties, which may lead to overpressure or underpressure. Overpressure may damage the surface or internal structure of the workpiece, while underpressure may cause the workpiece to move during the processing, affecting the processing quality.

[0005] Therefore, an adaptive pressure regulating clamping cylinder is proposed for the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an adaptive pressure regulating clamping cylinder to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solution: An adaptive pressure regulating clamping cylinder, including a cylinder body. A throttle valve core is arranged at the center inside the cylinder body. Springs are arranged on both sides of the throttle valve core. A gland is arranged above the throttle valve core. An upper end cover is arranged above the gland. A piston mechanism is arranged below the throttle valve core. A piston rod is arranged below the piston mechanism. A lower end cover is arranged below the piston rod. A sealing end cover is arranged on one side of the lower end cover. A piston sealing layer is arranged inside the sealing end cover. A combined sealing layer is arranged on one side of the piston sealing layer. An adjusting mechanism is arranged on the other side of the piston sealing layer. A displacement induction probe is arranged on one side of the adjusting mechanism.

[0008] Preferably, the throttle valve core forms a piston-type buffer valve core through the spring and the gland, so that the opening degree of the throttle hole of the throttle valve core can be adjusted adaptively.

[0009] Preferably, a first sealing ring is arranged on the outer wall of the throttle valve core, and a second sealing ring is arranged on the outer wall of the gland.

[0010] Preferably, the piston mechanism includes a piston, a piston ring and a piston pin. A plurality of groups of ring grooves are arranged on the outer wall of the piston. The piston ring is connected to the piston through the ring grooves, and a piston pin is arranged below the piston.

[0011] Preferably, the sealing end cover and the lower end cover form a sealed cavity, and the piston sealing layer squeezes the combined sealing layer under the push of the adjusting mechanism.

[0012] Preferably, the adjusting mechanism includes an adjusting screw, a locking nut and a thrust bearing. A thrust bearing is arranged on one side of the adjusting screw, and a locking nut is arranged on one side of the thrust bearing.

[0013] The technical effects and advantages of the present utility model:

[0014] Compared with the prior art, the self-adaptive pressure regulating clamping cylinder adjusts the combined seal clearance by piston seal extrusion of the combined seal, so as to realize the self-adaptive sealing function. The self-adaptive pressure regulation allows the clamping cylinder to automatically adjust the pressure according to the change of the load, so as to accurately control the clamping force. Through accurate pressure regulation, excessive consumption of hydraulic power is avoided, thereby reducing energy consumption.

[0015] Compared with the prior art, the self-adaptive pressure regulating clamping cylinder can achieve precise measurement at the micron level through high-precision displacement sensors such as LVDT or grating sensors. Automated measurement reduces human participation, thereby reducing the possibility of human error. Real-time monitoring of displacement changes can detect abnormal situations in time and prevent equipment failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the piston mechanism of the present utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the adjusting mechanism and the piston sealing layer of the present utility model.

[0019] The reference numerals are: 1, cylinder block; 2, throttle valve spool; 3, spring; 4, gland; 5, upper end cover; 6, piston mechanism; 7, piston rod; 8, lower end cover; 9, sealing end cover; 10, piston sealing layer; 11, combined sealing layer; 12, adjusting mechanism; 13, displacement induction probe; 14, first sealing ring; 15, second sealing ring; 16, piston; 17, piston ring; 18, piston pin; 19, adjusting screw; 20, locking nut; 21, thrust bearing. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0021] As shown in the attached Figures 1 to 3 An adaptive pressure regulating clamping cylinder includes a cylinder block 1. The cylinder block 1 is made of wear-resistant and heat-resistant materials to extend the service life of the cylinder block. The high-precision processing technology ensures the dimensional accuracy and surface quality of the cylinder block 1, improving the overall reliability. A throttle valve spool 2 is arranged at the center inside the cylinder block 1. The material selection of the throttle valve spool 2 needs to consider the requirements of high strength, wear resistance and corrosion resistance to ensure long-term stable operation. Stainless steel or alloy steel are commonly used materials, which can withstand the wear of continuous use and the corrosion of various working media. Springs 3 are arranged on both sides of the throttle valve spool 2. This design reduces the need for manual adjustment and lowers the operation complexity, which is of great significance for realizing an automated and intelligent control system.

[0022] A gland 4 is arranged above the throttle valve spool 2. The material of the gland 4 needs to have sufficient strength and wear resistance to withstand the pressure and wear caused by movement in the system. Commonly used materials include high-strength steel or stainless steel. The gland 4 and the throttle valve spool 2 cooperate to form a variable throttle orifice, and the buffering speed is adjusted by changing the opening degree of the throttle orifice. An upper end cover 5 is arranged above the gland 4. Most end covers can be machined by a CNC machine tool, but for some small and complex cavities and right-angle positions, it may be necessary to design a special electrode for electro-erosion machining. The end cover needs to have a certain anti-vibration ability to prevent loosening or fatigue damage caused by vibration.

[0023] Below the throttle valve spool 2, there is a piston mechanism 6. The piston mechanism 6 is made of aluminum alloy or cast iron, providing sufficient strength, stiffness, and heat resistance to adapt to the high-temperature and high-pressure working environment. Below the piston mechanism 6, there is a piston rod 7. The piston rod 7 is made of high-strength steel or alloy steel and its surface is specially treated, such as roll forming, which significantly improves its surface hardness and wear resistance. Below the piston rod 7, there is a lower end cover 8. On one side of the lower end cover 8, there is a sealing end cover 9. The sealing end cover 9 is usually made of materials such as aluminum alloy, cast iron, or high-strength steel to provide sufficient strength and stiffness. Inside the sealing end cover 9, there is a piston sealing layer 10. On one side of the piston sealing layer 10, there is a combined sealing layer 11. The piston sealing layer 10 is responsible for forming an effective seal between the piston 16 and the cylinder block 1 to prevent gas or liquid leakage and ensure the efficient operation of the engine or hydraulic system. The combined sealing layer 11 provides higher sealing performance and reliability through the combined use of multiple seals, compensates for the wear of individual seals, and extends the service life. On the other side of the piston sealing layer 10, there is an adjustment mechanism 12. On one side of the adjustment mechanism 12, there is a displacement induction probe 13. The model of the displacement induction probe 13 is Omron ZW-S20. This is an optical fiber coaxial displacement sensor probe with a measurement range of 40 ± 6 mm, a light spot diameter of φ80 μm, and a static resolution of 0.08 μm. It has an IP67 structure, is suitable for harsh environments, and can achieve measurements that are difficult to achieve by non-contact methods. Embodiment 2

[0024] Based on Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working methods, as Figures 1 to 3 shown, and the details are described below:

[0025] As a preferred implementation method, the throttle valve spool 2 forms a piston-type buffer valve spool through the spring 3 and the gland 4, enabling the throttle orifice opening of the throttle valve spool 2 to be adaptively adjusted. Further, the core design of the piston-type buffer throttle valve spool 2 lies in its ability to automatically adjust the throttle orifice opening according to the change of the oil pressure in the hydraulic cylinder. This design allows the throttle valve spool 2 to change its position during operation, thereby affecting the flow of the oil and achieving dynamic control of the buffer speed.

[0026] As a preferred implementation method, a first sealing ring 14 is provided on the outer wall of the throttle valve spool 2, and a second sealing ring 15 is provided on the outer wall of the gland 4. Further, the first sealing ring 14 and the second sealing ring 15 are made of rubber material and play a role in making the parts self-sealing.

[0027] As a preferred embodiment, the piston mechanism 6 includes a piston 16, piston rings 17 and a piston pin 18. A plurality of groups of ring grooves are provided on the outer wall of the piston 16. The piston 16 is connected with the piston rings 17 through the ring grooves. A piston pin 18 is provided below the piston 16. Further, the piston rings 17 are installed in the grooves on the upper part of the piston 16 for sealing the combustion chamber and controlling the application of engine oil. The piston pin 18 connects the piston 16 and the piston rod 7, allowing the piston 16 to reciprocate in the cylinder block 1.

[0028] As a preferred embodiment, the sealing end cover 9 and the lower end cover 8 form a sealed cavity. The piston sealing layer 10 squeezes the combined sealing layer 11 under the push of the adjusting mechanism 12. Further, this design can quickly and automatically adjust the buffering speed according to the load change, improving the buffering effect and working efficiency.

[0029] As a preferred embodiment, the adjusting mechanism 12 includes an adjusting screw 19, a locking nut 20 and a thrust bearing 21. A thrust bearing 21 is provided on one side of the adjusting screw 19, and a locking nut 20 is provided on one side of the thrust bearing 21. Further, the adjusting screw 19 is used to push the piston sealing layer 10. By rotating the adjusting screw 19, the position of the piston sealing layer 10 can be changed. The locking nut 20 is fixed on the adjusting screw 19 to lock the position of the adjusting screw 19 and prevent it from loosening due to vibration or other external forces. The thrust bearing 21 is installed between the adjusting screw 19 and the piston sealing layer 10 to reduce friction and allow smooth linear movement.

[0030] The working process of the present utility model is as follows: First, during the working process of the cylinder block 1, when the load increases, the oil pressure in the hydraulic cylinder rises, pushing the throttle valve core 2 to move in the direction of increasing the opening, thereby increasing the opening of the throttle hole, allowing more oil to flow and increasing the buffering speed. When the load decreases, the oil pressure drops, and the elastic force of the spring 3 pushes the throttle valve core 2 to move in the closing direction, reducing the opening of the throttle hole and lowering the buffering speed. The above is the working principle of this self-adaptive pressure-adjusting clamping cylinder.

Claims

1. An adaptive pressure regulating clamping cylinder, comprising a cylinder body (1), characterized in that: A throttle valve core (2) is arranged at the center of the cylinder body (1), springs (3) are arranged on both sides of the throttle valve core (2), a pressure cover (4) is arranged above the throttle valve core (2), an upper end cover (5) is arranged above the pressure cover (4), a piston mechanism (6) is arranged below the throttle valve core (2), a piston rod (7) is arranged below the piston mechanism (6), a lower end cover (8) is arranged below the piston rod (7), a sealing end cover (9) is arranged on one side of the lower end cover (8), a piston sealing layer (10) is arranged inside the sealing end cover (9), a combined sealing layer (11) is arranged on one side of the piston sealing layer (10), an adjustment mechanism (12) is arranged on the other side of the piston sealing layer (10), and a displacement sensing probe (13) is arranged on one side of the adjustment mechanism (12).

2. The adaptive pressure regulating clamping cylinder according to claim 1, characterized in that: The throttle valve core (2) forms a piston-type buffer valve core through the spring (3) and the pressure cover (4), so that the throttle hole opening of the throttle valve core (2) can be adaptively adjusted.

3. The adaptive pressure regulating clamping cylinder according to claim 1, characterized in that: The outer wall of the throttle valve core (2) is provided with a first sealing ring (14), and the outer wall of the gland (4) is provided with a second sealing ring (15).

4. The adaptive pressure regulating clamping cylinder according to claim 1, characterized in that: The piston mechanism (6) comprises a piston (16), a piston ring (17) and a piston pin (18); a plurality of groups of ring grooves are provided on the outer wall of the piston (16); the piston (16) is connected to the piston ring (17) via the ring groove; and a piston pin (18) is provided below the piston (16).

5. The adaptive pressure regulating clamping cylinder according to claim 1, characterized in that: The sealing end cover (9) and the lower end cover (8) form a sealing cavity, and the piston sealing layer (10) presses the combined sealing layer (11) under the push of the adjustment mechanism (12).

6. The adaptive pressure regulating clamping cylinder according to claim 1, characterized in that: The adjustment mechanism (12) comprises an adjustment screw (19), a locking nut (20) and a thrust bearing (21); one side of the adjustment screw (19) is provided with the thrust bearing (21); and one side of the thrust bearing (21) is provided with the locking nut (20).

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