High-internal-pressure damper oil cylinder tightening equipment and method

Abstract

The invention belongs to the technical field of oil cylinder tightening equipment, and particularly relates to high-internal-pressure damper oil cylinder tightening equipment and method. Comprising a rotary pneumatic claw, a three-way displacement mechanism is fixedly mounted above the rotary pneumatic claw, and a cylinder cover is clamped below the rotary pneumatic claw; a piston rod penetrates through the middle of the cylinder cover, and an upper lug plate is fixedly arranged at one end of the piston rod. A cylinder barrel is arranged below the piston rod and is clamped and fixed by a clamping mechanism; the problems of abrasion and even subsequent oil leakage acceleration caused by excessive extrusion and collision of the piston rod, the cylinder barrel and sealing parts in the damper can be prevented; according to the oil brushing device, flexible adjustment and positioning of the piston rod can be guaranteed, oil brushing treatment can be synchronously carried out, and oil brushing and subsequent tightening can be rapidly carried out; according to the oil brushing device, oil brushing treatment can be automatically carried out on the inner walls of the piston rod, the piston head with the hole and the cylinder barrel body, meanwhile, the oil consumption can be greatly reduced, and excessive lubrication is avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic cylinder tightening equipment, specifically relating to a hydraulic cylinder tightening device and method for a high internal pressure damper. Background Technology

[0002] A hydraulic cylinder tightening device is an automated machine specifically designed for tightening bolts in hydraulic cylinders or related hydraulic systems. This equipment is typically electrically or hydraulically driven, and by precisely controlling torque and tightening sequence, it ensures that the predetermined tightening force is achieved during installation, thereby improving the cylinder's sealing and safety. It is widely used in industries such as machinery manufacturing, automotive, and aerospace to improve production efficiency and product quality.

[0003] A viscous damper is a device used to control and reduce vibration, widely used in buildings, bridges, and machinery. Its working principle is based on the resistance generated by the movement of a viscous fluid within the damper, which absorbs and dissipates vibrational energy, thereby reducing the vibration and response of the structure. The hydraulic cylinder and cylinder head of the viscous damper need to be tightened using a hydraulic cylinder tightening device.

[0004] Chinese Patent Application No. 202222022752.0 discloses a tightening device for a hydraulic cylinder, comprising a movable frame. The top of the movable frame is equipped with a fixing device for securing the cylinder body and a tightening device for tightening a control nut on the cylinder body. The tightening device includes a hydraulic telescopic rod, a manual pump, a gear, and a rack. Both the hydraulic telescopic rod and the manual pump are located at the top of the movable frame. The manual pump is connected to the hydraulic telescopic rod. The rack is fixedly connected to the telescopic end of the hydraulic telescopic rod. The gear is detachably connected to the control nut. When the hydraulic telescopic rod extends or retracts, causing the rack to move, the rack and gear mesh appropriately. This patent has the advantages of simple structure and time-saving and labor-saving tightening.

[0005] When tightening the cylinder and cylinder head of the damper, due to the numerous sealing rings used in the viscous damper, inaccurate positioning during tightening can lead to excessive compression and collision, causing wear and even accelerated oil leakage. Simultaneously, when tightening the cylinder head, it is usually necessary to brush the cylinder barrel, piston rod, and seals with oil to reduce friction and wear. However, current methods typically involve manual brushing before tightening, which is inefficient and can leave contaminants and impurities inside the damper, leading to further wear and performance degradation. Furthermore, the brushing process cannot be automatically controlled, resulting in excessive lubrication. Finally, rapid alignment and positioning are also key research areas during cylinder tightening. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a high-pressure damper cylinder tightening device and method. This invention, through the structural cooperation of a limiting mechanism with the cylinder and rotating pneumatic gripper, prevents the piston rod from being positioned and guided during insertion, thus preventing excessive compression and collision of the piston rod, cylinder, and internal sealing components of the damper, which could lead to wear and even accelerated subsequent oil leakage. Furthermore, the cooperation of a sponge oiling mechanism with the limiting mechanism and piston rod ensures flexible adjustment and positioning of the piston rod while simultaneously performing oiling, enabling rapid oiling and subsequent tightening, further improving adjustment efficiency and preventing performance degradation caused by internal contamination of the cylinder body. The sponge oiling mechanism, in conjunction with the piston rod, not only automatically oils the piston rod, perforated piston head, and the inner wall of the cylinder body, but also significantly reduces oil consumption and avoids over-lubrication.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A high internal pressure damper cylinder tightening device includes a rotary pneumatic gripper, a three-way displacement mechanism fixedly installed above the rotary pneumatic gripper, and a cylinder cover clamped below the rotary pneumatic gripper; a piston rod passes through the middle of the cylinder cover, and an upper ear plate is fixedly provided at one end of the piston rod; a cylinder is provided below the piston rod, and the cylinder is clamped and fixed by the clamping mechanism; the cylinder includes a cylinder body, the upper end of the cylinder body is fixedly connected to the middle of the outer bottom of an upper circular groove, and the lower end of the cylinder body is fixedly connected to the middle of the outer bottom of a lower circular groove; a receiving cylinder cover is welded and fixedly provided at the lower end, and a lower ear plate is fixedly provided at the end of the receiving cylinder cover; a limit mechanism is inserted into the upper circular groove.

[0008] Furthermore, a lower rubber sealing ring is movably disposed between the lower circular groove and the receiving cylinder cover, an upper rubber sealing ring is fixedly connected to the top of the cylinder cover, and a perforated piston head is fixedly connected to the middle of the piston rod.

[0009] Furthermore, the limiting mechanism includes two symmetrically arranged semi-circular plug-in blocks, which are inserted into the upper circular groove; control rods are fixedly connected to the top two ends of each semi-circular plug-in block; an oil groove is formed in the middle of the top of each semi-circular plug-in block, and a groove cover is fixedly connected to the top of the oil groove by bolts; multiple receiving grooves are formed on the inner sidewall of each semi-circular plug-in block, and a guide tube is fixedly connected to the bottom of each receiving groove, the guide tube being located inside the oil groove; a sponge brushing mechanism is installed on the receiving groove.

[0010] Furthermore, the sponge brushing mechanism includes a sponge groove, with a through groove extending through the bottom of the sponge groove, and a sponge body fixedly installed inside the sponge groove; rotating rods are fixedly installed at both ends of the top of the sponge groove, and rotating holes are correspondingly opened on both sides of the top of the receiving groove, which are rotatably connected to the rotating rods; a reset mechanism is vertically slidably connected to the through groove, and the reset mechanism is slidably connected to the guide tube.

[0011] Furthermore, the reset mechanism includes a connecting pipe that is slidably connected to the inside of a guide pipe; one end of the connecting pipe is hinged to a hinge groove via a connecting shaft; vertical guide blocks are fixedly provided on both sides of the hinge groove, and vertical guide grooves are correspondingly provided on both sides of the through groove, with the vertical guide blocks slidably connected to the vertical guide grooves; a sealing disc is fixedly and closedly connected to the other end of the connecting pipe, and a reset spring is sleeved on the connecting pipe, with both ends of the reset spring fixedly connected to the inside of the sealing disc and the oil groove, respectively; an oil passage hole is provided through the side wall of the connecting pipe.

[0012] Furthermore, the thickness of the sponge groove is less than the thickness of the receiving groove, and there is a gap between the bottom of the sponge groove and the bottom of the receiving groove; when one end of the sponge groove abuts against the piston rod, the oil passage is located inside the guide tube and is sealed; when the sponge body abuts against the perforated piston head, the oil passage is located outside the guide tube and communicates with the oil groove.

[0013] Furthermore, the lower rubber sealing ring and the upper rubber sealing ring have the same structure. The upper rubber sealing ring includes a large-diameter sealing ring and a small-diameter sealing ring that are fixedly connected to each other. The large-diameter sealing ring fits against the bottom of the upper circular groove, and the small-diameter sealing ring fits against the inner wall of the cylinder body. An oil passage hole is formed through the perforated piston head.

[0014] Furthermore, the cylinder head includes a cover plate and a cover body that are fixed to each other, and a sliding hole is provided through the middle of both the cover plate and the cover body; multiple limiting slots are evenly provided around the cover plate; the cover body is provided with threads, and an internal thread is provided on the upper side of the upper circular groove, and the internal thread is threadedly connected to the cover body.

[0015] Furthermore, the receiving grooves on the inner sidewalls of the two semi-ring plug blocks are distributed in a ring at equal intervals; an oil inlet is fixedly connected to the groove cover, and a valve is installed on the oil inlet.

[0016] This invention also claims a method for tightening using the aforementioned damper cylinder tightening device, comprising the following steps: S1. Clamp the cylinder body with the clamping mechanism, clamp the cylinder head with the rotating pneumatic gripper, and then insert the two semi-ring plug blocks into the upper circular groove; and control the cylinder head and piston rod to move down and insert between the two semi-ring plug blocks through the three-way displacement mechanism, so that one end of the sponge groove abuts the piston rod for positioning. At this time, the oil passage is located inside the guide tube and is sealed, and the sponge body is initially brushed with oil. S2. When the piston rod deviates, the rotation angles of the multiple sponge grooves are different. At this time, the three-way displacement mechanism is controlled to make fine adjustments and then continue to move downward, so that the piston rod inserts into the lower rubber sealing ring. S3. When the perforated piston head is inserted between the two semi-ring plug blocks, the perforated piston head squeezes the sponge groove to rotate, so that the sponge body fits the perforated piston head for secondary oiling. At this time, the oil passage is located outside the guide tube and is connected to the oil groove. The oil in the oil groove flows into the receiving groove through the oil passage at the same time, and flows out from the gap between the bottom of the sponge groove and the bottom of the receiving groove to guide the oil to the upper end of the inner wall of the cylinder. S4. When the perforated piston head enters the cylinder, the sponge groove rotates and resets. At this time, the oil passage is closed and oil stops flowing out. Under the downward movement of the perforated piston head, the oil is continuously and synchronously carried into the inner wall of the cylinder for coating. S5. Before inserting the cylinder head into the upper circular groove, remove the limiting mechanism, and finally tighten the cylinder head with the upper circular groove by rotating the pneumatic gripper itself and lowering it.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention, through the structural cooperation of the limiting mechanism with the cylinder and the rotating gripper, can avoid the piston rod being positioned and guided during the insertion process, and prevent the piston rod, cylinder and the sealing components inside the damper from being excessively squeezed and collided, resulting in wear or even accelerated subsequent oil leakage. Specifically, when the piston rod is inserted, the clamping mechanism clamps the cylinder body, the rotating gripper clamps the cylinder head, and then the two semi-ring insertion blocks are inserted into the upper circular groove. The cylinder head and piston rod are controlled to move down and insert between the two semi-ring insertion blocks through the three-way displacement mechanism. At this time, since the two plate-type insertion blocks form a size that matches the perforated piston head, it plays a positioning and guiding role. Therefore, if the perforated piston head can be inserted between the two semi-ring insertion blocks, it proves that the piston rod has not deviated. This ensures that the piston rod can be accurately inserted into the lower rubber sealing ring, and at the same time, it ensures that the perforated piston head can be accurately inserted into the cylinder body. This avoids the problem of wear or even accelerated subsequent oil leakage caused by excessive squeezing and collision between the perforated piston head, piston rod and cylinder body and lower rubber sealing ring due to misalignment.

[0018] (2) The present invention, through the cooperation of the sponge oiling mechanism, the limiting mechanism, and the piston rod, can not only ensure the flexible adjustment and positioning of the piston rod, but also perform oiling simultaneously, so that oiling and subsequent tightening can be carried out quickly, further improving the adjustment efficiency and avoiding the subsequent performance degradation caused by contamination inside the cylinder body; Specifically, when the cylinder head and piston rod are controlled to move down and insert between the two semi-ring plug blocks by the three-way displacement mechanism, one end of the multiple sponge grooves abuts against the piston rod for positioning and abutment. When the piston rod deviates, the rotation angle of the multiple sponge grooves is different. At this time, the three-way displacement mechanism can be flexibly controlled to make fine adjustments according to the rotation deviation direction of the sponge grooves and continue to move down, so that the piston rod can be accurately inserted into the lower rubber sealing ring. In this way, the wear of the piston rod can be minimized when it is inserted into the lower rubber sealing ring, and the adjustment efficiency is greatly improved; At the same time, the oil adsorbed on the sponge body can perform preliminary oiling on the piston rod, thereby further reducing the friction of the piston rod and preventing contaminants from entering the cylinder body due to manual oiling, which would cause contamination and subsequent performance degradation.

[0019] (3) This invention, through the cooperation of the sponge oiling mechanism and the piston rod, can not only automatically oil the piston rod, the perforated piston head, and the inner wall of the cylinder body, but also greatly save oil usage and avoid over-lubrication. Specifically, when the piston rod moves down and is inserted, it is positioned when one end of the sponge groove abuts against the piston rod. At this time, the oil passage is located inside the guide tube and is closed, and the sponge body performs initial oiling. At this time, only the oil stored inside the sponge body is used. When the piston head is inserted between the two semi-ring insert blocks, the perforated piston head squeezes the sponge groove to rotate, so that the sponge body fits the perforated piston head for secondary oiling. At this time, the oil passage is located outside the guide tube and is connected to the oil groove. The oil in the oil groove flows into the receiving groove through the oil passage and from the bottom of the sponge groove to the bottom of the receiving groove. The oil flows out through the gap to guide oil to the upper part of the inner wall of the cylinder. This allows the perforated piston head to be brushed with oil through the sponge body. The oil flowing out through the gap between the bottom of the sponge groove and the bottom of the receiving groove guides oil to the inner wall of the cylinder, ensuring sufficient oil for subsequent large-area brushing. When the perforated piston head enters the cylinder, the sponge groove rotates and resets, at which point the oil passage closes and oil flow stops. Only the oil stored inside the sponge body brushes the piston rod, automatically saving oil. Furthermore, the downward movement of the perforated piston head continuously carries the previously drained oil into the inner wall of the cylinder for complete brushing, ensuring a large area of ​​the cylinder's inner wall is thoroughly brushed. In this way, automatic oiling of the piston rod, perforated piston head, and inner wall of the cylinder body is achieved, while significantly saving oil consumption and avoiding over-lubrication. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a high internal pressure damper cylinder tightening device according to the present invention; Figure 2This is a schematic cross-sectional view of a high internal pressure damper cylinder tightening device according to the present invention; Figure 3 This is a schematic diagram of the distributed structure of a high internal pressure damper cylinder tightening device according to the present invention; Figure 4 This is a schematic diagram of a partially dispersed structure of a high internal pressure damper cylinder tightening device according to the present invention; Figure 5 This is a schematic diagram of the limiting mechanism and sponge brushing mechanism of a high internal pressure damper cylinder tightening device according to the present invention. Figure 6 This is a schematic diagram of the distributed structure of the limiting mechanism of a high internal pressure damper cylinder tightening device according to the present invention; Figure 7 This is a schematic diagram of the dispersed structure of the sponge brushing mechanism in a high internal pressure damper cylinder tightening device according to the present invention; Figure 8 This is a schematic diagram of the tightening method of a high internal pressure damper cylinder tightening device according to the present invention.

[0021] The attached figures are labeled as follows: Cylinder head-100, cover plate-110, limiting groove-111, sliding hole-112, cover body-120, piston rod-200, piston head with hole-210, oil passage hole-211, upper ear plate-220, cylinder barrel-300, cylinder barrel body-310, upper circular groove-320, internal thread-321, lower circular groove-330, receiving cylinder cover-400, lower ear plate-410, clamping mechanism-500, limiting mechanism-600, control rod-610, semi-ring plug-in block-620, oil groove-621, receiving groove-622, guide tube-623 630, 640, 700, 710, 711, 712, 713, 720, 721, 722, 723, 724, 725, 726, 727, 730, 800, 910, 911, 912, 920; 723, 724, 725, 726, 727, 730, 800, 910, 911, 912, 920; 920, 921, 922, 723, 724, 725, 726, 727, 730, 800, 910, 911, 912, 920. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0024] Example like Figures 1-8 As shown, a high internal pressure damper cylinder tightening device includes a rotary pneumatic gripper 800. A three-way displacement mechanism is fixedly installed above the rotary pneumatic gripper 800, and a cylinder cover 100 is clamped below the rotary pneumatic gripper 800. A piston rod 200 passes through the middle of the cylinder cover 100, and an upper ear plate 220 is fixedly installed at one end of the piston rod 200. A cylinder 300 is provided below the piston rod 200, and the cylinder 300 is clamped and fixed by a clamping mechanism 500. The cylinder 300 includes a cylinder body 310, the upper end of which is fixedly connected to the middle of the outer bottom of an upper circular groove 320, and the lower end of which is fixedly connected to the middle of the outer bottom of a lower circular groove 330. A receiving cover 400 is welded and fixedly installed at the lower end, and a lower ear plate 410 is fixedly installed at the end of the receiving cover 400. A limit mechanism 600 is inserted into the upper circular groove 320.

[0025] The present invention, through the structural cooperation of the limiting mechanism 600 with the cylinder 300 and the rotating pneumatic gripper 800, can prevent the piston rod 200 from being positioned and guided during the insertion process, and prevent the piston rod 200, cylinder 300 and the sealing components inside the damper from being excessively squeezed and collided, which could lead to wear or even accelerated subsequent oil leakage; a detailed description will follow.

[0026] It is worth noting that the rotary gripper 800, clamping mechanism 500, and three-way displacement mechanism of this invention are all existing mature technologies. The rotary gripper 800 can both clamp and rotate; the clamping mechanism 500 can clamp and release through the design of the telescopic cylinder; the three-way displacement mechanism can move in the X, Y, and Z directions through the guide rail and hydraulic rod control, and all of them are powered by an external power source, which will not be described in detail here.

[0027] Furthermore, a lower rubber sealing ring 920 is movably disposed between the lower circular groove 330 and the receiving cylinder cover 400, an upper rubber sealing ring 910 is fixedly connected to the top of the cylinder cover 100, and a perforated piston head 210 is fixedly connected to the middle of the piston rod 200.

[0028] It is worth noting that a viscous liquid will be injected into the cylinder body 310 between the lower rubber sealing ring 920 and the upper rubber sealing ring 910. The cylinder body 310 is equipped with an injection port, which is an existing mature technology and is not shown in the attached drawings, so it will not be described in detail here.

[0029] Furthermore, the limiting mechanism 600 includes two symmetrically arranged semi-circular plug-in blocks 620, which are inserted into the upper circular groove 320; control rods 610 are fixedly connected to the top two ends of the semi-circular plug-in blocks 620; an oil groove 621 is opened in the middle of the top of the semi-circular plug-in blocks 620, and a groove cover 630 is fixedly connected to the top of the oil groove 621 by bolts; multiple receiving grooves 622 are opened on the inner sidewall of the semi-circular plug-in blocks 620, and a guide tube 623 is fixedly connected to the bottom of the receiving groove 622, and the guide tube 623 is located inside the oil groove 621; a sponge brushing mechanism 700 is installed on the receiving groove 622.

[0030] When the piston rod 200 is inserted, the clamping mechanism 500 clamps the cylinder body 310, the rotating pneumatic gripper 800 clamps the cylinder head 100, and then two semi-annular insertion blocks 620 are inserted into the upper circular groove 320. The cylinder head 100 and piston rod 200 are moved downwards and inserted between the two semi-annular insertion blocks 620 by a three-way displacement mechanism. At this time, because the two plate-shaped insertion blocks 620 form a size that matches the perforated piston head 210, they play a positioning and guiding role. Therefore, if the perforated piston head 210 is inserted... If the plug 210 can be inserted between the two semi-ring inserts 620, it proves that the piston rod 200 is not misaligned. This ensures that the piston rod 200 can be accurately inserted into the lower rubber sealing ring 920, and also ensures that the perforated piston head 210 can be accurately inserted into the cylinder body 310. This avoids the problem of excessive compression and collision between the perforated piston head 210, piston rod 200, cylinder body 310, and lower rubber sealing ring 920 due to misalignment, which could lead to wear or even accelerated oil leakage.

[0031] It is worth noting that the semi-ring plug 620 can be controlled to perform the plugging operation via the control lever 610, thus avoiding the problem of impurities remaining inside the cylinder body 310 due to the hand operating above the cylinder body 310.

[0032] Furthermore, the sponge brushing mechanism 700 includes a sponge groove 710, with a through groove 712 extending through the bottom of the sponge groove 710, and a sponge body 730 fixedly installed inside the sponge groove 710; rotating rods 711 are fixedly provided at both ends of the top of the sponge groove 710, and rotating holes are correspondingly provided on both sides of the top of the receiving groove 622, which are rotatably connected to the rotating rods 711; a reset mechanism 720 is vertically slidably connected to the through groove 712, and the reset mechanism 720 is slidably connected to the guide tube 623.

[0033] This invention, through the cooperation of the sponge oiling mechanism 700, the limiting mechanism 600, and the piston rod 200, can ensure the flexible adjustment and positioning of the piston rod 200, and can simultaneously perform oiling treatment, so that oiling and subsequent tightening can be carried out quickly, further improving adjustment efficiency and avoiding the problem of subsequent performance degradation caused by contamination inside the cylinder body 310; a detailed description will follow.

[0034] Furthermore, the reset mechanism 720 includes a connecting pipe 721, which is slidably connected to the interior of the guide pipe 623; one end of the connecting pipe 721 is hinged to the hinge groove 725 via a connecting shaft 726; vertical guide blocks 727 are fixedly provided on both sides of the hinge groove 725, and vertical guide grooves 713 are correspondingly provided on both sides of the through groove 712, with the vertical guide blocks 727 slidably connected to the vertical guide grooves 713; a sealing disc 722 is fixedly and closedly connected to the other end of the connecting pipe 721, and a reset spring 724 is sleeved on the connecting pipe 721, with both ends of the reset spring 724 fixedly connected to the interior of the sealing disc 722 and the oil groove 621, respectively; an oil passage hole 723 is provided through the side wall of the connecting pipe 721.

[0035] When the cylinder head 100 and piston rod 200 are lowered and inserted between the two semi-ring insert blocks 620 by the three-way displacement mechanism, one end of each of the multiple sponge grooves 710 abuts against the piston rod 200 for positioning. When the piston rod 200 deviates, the rotation angles of the multiple sponge grooves 710 are different. At this time, the three-way displacement mechanism can be flexibly controlled to make fine adjustments according to the rotation deviation direction of the sponge grooves 710 before continuing to move downward, so that the piston rod 200 can be accurately inserted into the lower rubber sealing ring 920. In this way, the wear of the piston rod 200 when inserted into the lower rubber sealing ring 920 can be minimized and the adjustment efficiency can be greatly improved. At the same time, the oil adsorbed on the sponge body 730 can perform preliminary oiling on the piston rod 200, thereby further reducing the friction of the piston rod 200 and preventing contaminants from entering the cylinder body 310 due to manual oiling, which could cause contamination and subsequent performance degradation.

[0036] It is worth noting that the principle of the deflection of the sponge groove 710 is that the resetting spring 724 causes the connecting pipe 721 to slide on the guide pipe 623, thereby pushing the hinge groove 725 laterally, which in turn causes the sponge groove 710 to deflect. Furthermore, since the hinge groove 725 is vertically slidably connected to the through groove 712, the problem of jamming is avoided.

[0037] Furthermore, the thickness of the sponge groove 710 is less than the thickness of the receiving groove 622, and there is a gap between the bottom of the sponge groove 710 and the bottom of the receiving groove 622; when one end of the sponge groove 710 abuts against the piston rod 200, the oil passage 723 is located inside the guide tube 623 and is sealed; when the sponge body 730 abuts against the perforated piston head 210, the oil passage 723 is located outside the guide tube 623 and communicates with the oil groove 621.

[0038] This invention, through the cooperation of the sponge oiling mechanism 700 and the piston rod 200, can not only automatically oil the inner walls of the piston rod 200, the perforated piston head 210, and the cylinder body 310, but also significantly save oil usage and avoid over-lubrication. Specifically, when the piston rod 200 moves down and inserts, it is positioned when one end of the sponge groove 710 abuts against the piston rod 200. At this time, the oil passage 723 is sealed inside the guide tube 623, and the sponge body 730... Initial oiling is performed, using only the oil stored inside the sponge body 730. When the piston head 210 is inserted between the two semi-ring inserts 620, the perforated piston head 210 squeezes the sponge groove 710 to rotate, causing the sponge body 730 to adhere to the perforated piston head 210 for secondary oiling. At this time, the oil passage 723 is located outside the guide tube 623 and communicates with the oil groove 621. The oil in the oil groove 621 flows into the receiving groove 622 through the oil passage 723, and from the bottom of the sponge groove 710 and the receiving groove 622... The oil flowing out through the gap between the bottom of the receiving groove 622 guides oil to the upper end of the inner wall of the cylinder 300. This allows the perforated piston head 210 to be brushed with oil via the sponge body 730. The oil flowing out through the gap between the bottom of the sponge groove 710 and the bottom of the receiving groove 622 guides oil to the inner wall of the cylinder 300, ensuring a large-area oil application subsequently. When the perforated piston head 210 enters the cylinder 300, the sponge groove 710 rotates and resets, at which point the oil passage 723 closes, stopping oil flow, and only allowing oil to pass through... The oil stored inside the sponge body 730 is used to brush the piston rod 200, thereby automatically saving oil. Under the downward movement of the perforated piston head 210, the previously discharged oil is continuously carried into the inner wall of the cylinder 300 for brushing, so that a large area of ​​the inner wall of the cylinder 300 is completely brushed with oil. In this way, the piston rod 200, the perforated piston head 210, and the inner wall of the cylinder body 310 are automatically brushed with oil, while also greatly saving the amount of oil used and avoiding over-lubrication.

[0039] Furthermore, the lower rubber sealing ring 920 and the upper rubber sealing ring 910 have the same structure. The upper rubber sealing ring 910 includes a large-diameter sealing ring 911 and a small-diameter sealing ring 912 that are fixedly connected to each other. The large-diameter sealing ring 911 fits into the bottom of the upper circular groove 320, and the small-diameter sealing ring 912 fits into the inner wall of the cylinder body 310. An oil passage hole 211 is formed through the perforated piston head 210. The structural design of the lower rubber sealing ring 920 and the upper rubber sealing ring 910 further improves the sealing and stability performance. The perforated piston head 210 moves inside the cylinder 300, and a damping effect is achieved due to the resistance of the viscous liquid.

[0040] Furthermore, the cylinder head 100 includes a cover plate 110 and a cover body 120 fixed to each other. A sliding hole 112 is provided through the middle of both the cover plate 110 and the cover body 120. A plurality of limiting slots 111 are evenly provided around the cover plate 110. The cover body 120 is provided with threads, and an internal thread 321 is provided on the upper side of the upper circular groove 320. The internal thread 321 is threadedly connected to the cover body 120.

[0041] Furthermore, the receiving grooves 622 on the inner sidewalls of the two semi-annular plug blocks 620 are equidistantly distributed in a ring; an oil inlet 640 is fixedly connected to the groove cover 630, and a valve is installed on the oil inlet 640. Oil is replenished through the oil inlet 640.

[0042] A method for tightening using the aforementioned damper cylinder tightening device includes the following steps: S1. Clamp the cylinder body 310 with the clamping mechanism 500, clamp the cylinder head 100 with the rotating pneumatic gripper 800, and then insert the two semi-ring plug-in blocks 620 into the upper circular groove 320; and control the cylinder head 100 and piston rod 200 to move down and insert between the two semi-ring plug-in blocks 620 through the three-way displacement mechanism, so that one end of the sponge groove 710 abuts against the piston rod 200 for positioning. At this time, the oil passage 723 is located inside the guide tube 623 and is sealed, and the sponge body 730 is initially brushed with oil. S2. When the piston rod 200 deviates, the rotation angles of the multiple sponge grooves 710 are different. At this time, the three-way displacement mechanism is controlled to make fine adjustments and continue to move downward, so that the piston rod 200 is inserted into the lower rubber sealing ring 920. S3. When the perforated piston head 210 is inserted between the two semi-ring plug blocks 620, the perforated piston head 210 squeezes the sponge groove 710 to rotate, so that the sponge body 730 fits the perforated piston head 210 for secondary oiling. At this time, the oil passage hole 723 is located outside the guide tube 623 and is connected to the oil groove 621. The oil in the oil groove 621 flows into the receiving groove 622 through the oil passage hole 723 and flows out from the gap between the bottom of the sponge groove 710 and the bottom of the receiving groove 622 to guide the oil to the upper end of the inner wall of the cylinder 300. S4. When the perforated piston head 210 enters the cylinder 300, the sponge groove 710 rotates and resets. At this time, the oil passage 723 is closed and stops oil discharge. Under the downward movement of the perforated piston head 210, the oil is continuously and synchronously carried into the inner wall of the cylinder 300 for brushing. S5. Before the cylinder head 100 is inserted into the upper circular groove 320, the limiting mechanism 600 is removed, and finally the cylinder head 100 is tightened with the upper circular groove 320 by rotating and lowering the rotating pneumatic gripper 800.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A high internal pressure damper cylinder tightening device, characterized in that, The system includes a rotary pneumatic gripper (800), on which a three-way displacement mechanism is fixedly mounted; a cylinder head (100) is held below the rotary pneumatic gripper (800); a piston rod (200) passes through the middle of the cylinder head (100), and an upper ear plate (220) is fixedly mounted at one end of the piston rod (200); a cylinder (300) is located below the piston rod (200), and the cylinder (300) is held by a clamping mechanism (500). The cylinder (300) includes a cylinder body (310), the upper end of which is fixedly connected to the middle of the outer bottom of the upper circular groove (320), and the lower end of which is fixedly connected to the middle of the outer bottom of the lower circular groove (330); a receiving cover (400) is welded and fixed to the lower end, and a lower ear plate (410) is fixedly provided at the end of the receiving cover (400); a limit mechanism (600) is inserted into the upper circular groove (320).

2. The high internal pressure damper cylinder tightening device according to claim 1, characterized in that, A lower rubber sealing ring (920) is movably disposed between the lower circular groove (330) and the receiving cylinder cover (400), an upper rubber sealing ring (910) is fixedly connected to the top of the cylinder cover (100), and a perforated piston head (210) is fixedly connected to the middle of the piston rod (200).

3. The high internal pressure damper cylinder tightening device according to claim 2, characterized in that, The limiting mechanism (600) includes two symmetrically arranged semi-ring plugs (620), which are inserted into the upper circular groove (320). Control rods (610) are fixedly connected to the top two ends of the semi-ring plugs (620). An oil groove (621) is opened in the middle of the top of the semi-ring plugs (620), and a groove cover (630) is fixedly connected to the top of the oil groove (621) by bolts. Multiple receiving grooves (622) are opened on the inner sidewall of the semi-ring plugs (620), and a guide tube (623) is fixedly connected to the bottom of the receiving groove (622). The guide tube (623) is located inside the oil groove (621). A sponge brushing mechanism (700) is installed on the receiving groove (622).

4. The high internal pressure damper cylinder tightening device according to claim 3, characterized in that, The sponge brushing mechanism (700) includes a sponge groove (710), with a through groove (712) extending through the bottom of the sponge groove (710), and a sponge body (730) fixedly installed inside the sponge groove (710); rotating rods (711) are fixedly provided at both ends of the top of the sponge groove (710), and rotating holes are correspondingly provided on both sides of the top of the receiving groove (622), which are rotatably connected to the rotating rods (711); a reset mechanism (720) is vertically slidably connected to the through groove (712), and the reset mechanism (720) is slidably connected to the guide tube (623).

5. The high internal pressure damper cylinder tightening device according to claim 4, characterized in that, The reset mechanism (720) includes a connecting pipe (721), which is slidably connected to the inside of the guide pipe (623); one end of the connecting pipe (721) is hinged to the hinge groove (725) via a connecting shaft (726); vertical guide blocks (727) are fixedly provided on both sides of the hinge groove (725), and vertical guide grooves (713) are correspondingly provided on both sides of the through groove (712), and the vertical guide blocks (727) are slidably connected to the vertical guide grooves (713); the other end of the connecting pipe (721) is fixedly closed and connected to a sealing disc (722), and a reset spring (724) is sleeved on the connecting pipe (721), with both ends of the reset spring (724) fixedly connected to the inside of the sealing disc (722) and the oil groove (621) respectively; an oil passage hole (723) is provided through the side wall of the connecting pipe (721).

6. The high internal pressure damper cylinder tightening device according to claim 5, characterized in that, The thickness of the sponge groove (710) is less than the thickness of the receiving groove (622), and there is a gap between the bottom of the sponge groove (710) and the bottom of the receiving groove (622); when one end of the sponge groove (710) abuts against the piston rod (200), the oil passage (723) is located inside the guide tube (623) and is closed; when the sponge body (730) abuts against the perforated piston head (210), the oil passage (723) is located outside the guide tube (623) and communicates with the oil groove (621).

7. The high internal pressure damper cylinder tightening device according to claim 2, characterized in that, The lower rubber sealing ring (920) and the upper rubber sealing ring (910) have the same structure. The upper rubber sealing ring (910) includes a large-diameter sealing ring (911) and a small-diameter sealing ring (912) that are fixedly connected to each other. The large-diameter sealing ring (911) fits against the bottom of the upper circular groove (320), and the small-diameter sealing ring (912) fits against the inner wall of the cylinder body (310). An oil passage hole (211) is formed through the perforated piston head (210).

8. The high internal pressure damper cylinder tightening device according to claim 1, characterized in that, The cylinder head (100) includes a cover plate (110) and a cover body (120) fixed to each other. A sliding hole (112) is provided through the middle of both the cover plate (110) and the cover body (120). Multiple limiting slots (111) are evenly provided around the cover plate (110). The cover body (120) is provided with threads, and an internal thread (321) is provided on the upper side of the upper circular groove (320). The internal thread (321) is threadedly connected to the cover body (120).

9. The high internal pressure damper cylinder tightening device according to claim 3, characterized in that, The inner sidewalls of the two semi-ring plugs (620) have equidistant annular grooves (622) distributed in a ring; an oil inlet (640) is fixedly connected to the groove cover (630), and a valve is installed on the oil inlet (640).

10. A method for tightening a damper cylinder using the damper tightening device according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Clamp the cylinder body (310) with the clamping mechanism (500), clamp the cylinder head (100) with the rotating pneumatic gripper (800), and then insert the two semi-ring plug-in blocks (620) into the upper circular groove (320); and control the cylinder head (100) and piston rod (200) to move down and insert between the two semi-ring plug-in blocks (620) through the three-way displacement mechanism, so that one end of the sponge groove (710) abuts against the piston rod (200) for positioning. At this time, the oil passage (723) is located inside the guide tube (623) and is sealed, and the sponge body (730) is initially brushed with oil. S2. When the piston rod (200) deviates, the rotation angles of the multiple sponge grooves (710) are different. At this time, the three-way displacement mechanism is controlled to make fine adjustments and continue to move downward, so that the piston rod (200) inserts into the lower rubber sealing ring (920). S3. When the perforated piston head (210) is inserted between the two semi-ring plugs (620), the perforated piston head (210) squeezes the sponge groove (710) to rotate, so that the sponge body (730) fits the perforated piston head (210) for secondary oiling. At this time, the oil passage hole (723) is located outside the guide tube (623) and is connected to the oil groove (621). The oil in the oil groove (621) flows into the receiving groove (622) through the oil passage hole (723) and flows out from the gap between the bottom of the sponge groove (710) and the bottom of the receiving groove (622) to guide the oil to the upper end of the inner wall of the cylinder (300). S4. When the perforated piston head (210) enters the cylinder (300), the sponge groove (710) rotates and resets. At this time, the oil passage (723) is closed and stops oil discharge. Under the downward movement of the perforated piston head (210), the oil is continuously and synchronously carried into the inner wall of the cylinder (300) for brushing. S5. Before the cylinder head (100) is inserted into the upper circular groove (320), the limiting mechanism (600) is taken out, and finally the cylinder head (100) is tightened with the upper circular groove (320) by rotating and lowering the rotating pneumatic gripper (800).

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