Modular quick-release structure for a hydraulic cylinder

Abstract

The application provides a modular quick dismounting structure of a hydraulic cylinder, relates to the field of hydraulic cylinders, and comprises a cylinder barrel, an extension mechanism, a connecting conveying mechanism and a limiting mechanism. The inside of the cylinder barrel is provided with a convenient dismounting buffer mechanism. The convenient dismounting buffer mechanism comprises a sliding groove. The inside of the sliding groove is provided with a sliding block. One side of the sliding block is fixedly connected with a snap ring. The side surfaces of the sliding block and the snap ring are fixedly connected with first sealing rings. The upper sides of the sliding block and the snap ring are fixedly connected with buffer pads. The sliding block is fixedly connected at the top of the sliding groove through screws. The inside of the cylinder barrel is provided with a clamping groove. The inside of the clamping groove is fixedly connected with a rear end cover through screws. The modular quick dismounting structure of the hydraulic cylinder is characterized in that the sliding groove and the sliding block are slidingly connected, and the snap ring and other components can be quickly dismounted in cooperation with the screws. The clamping groove and the rear end cover fixedly connected with the screws can be conveniently replaced. Such a design makes it unnecessary to dismount the whole device for replacing the worn-out parts, greatly simplifies the process, shortens the maintenance time and improves the practicality.

Description

Technical Field

[0001] This application relates to the field of hydraulic cylinder technology, specifically a modular quick-disassembly structure for a hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are actuators that convert hydraulic energy into mechanical energy. They are widely used in mechanical engineering, industrial automation and other fields. Their core function is to drive the piston through the pressure of hydraulic oil to achieve linear reciprocating motion or oscillating motion, thereby driving the load to complete various actions, such as pushing, pulling and lifting.

[0003] A hydraulic cylinder with a tie rod is disclosed on the patent website (publication number: CN213392946U). This device has the advantage of good buffering effect, which can reduce the hard contact between the piston and the cylinder bottom and increase the service life of the device.

[0004] While the aforementioned prior art can achieve the desired result through its structure, it still suffers from the following drawbacks: Often, in the actual use of such devices, although a pair of symmetrically arranged buffer devices are installed near the bottom of the cylinder, and these buffer devices include compression rods that contact the piston to provide buffering force and prevent hard contact between the piston and the cylinder bottom, thus avoiding piston wear and increasing the service life of the hydraulic cylinder; however, during use, the parts of this hydraulic cylinder inevitably experience some wear. After prolonged use, this affects the user experience, necessitating the replacement of severely worn internal parts. Since most hydraulic cylinder replacements are done as a single unit rather than modularly assembled components, disassembly is inconvenient and its practicality is poor.

[0005] According to the patent website (publication number: CN219299670U), a hydraulic cylinder is disclosed. This utility model sets a first sealing ring, a second sealing ring and a third sealing ring on the piston body, and then sets a reinforcing rod to support the three sealing rings. In this way, the three sealing rings can be guaranteed not to deform during the continuous extension and retraction of the hydraulic cylinder, thereby greatly improving the sealing performance and preventing internal leakage.

[0006] Although the above-mentioned prior art can achieve the desired result through its structure, it still has the following drawbacks: In the actual use of such devices, although the setting of three sealing rings can improve the sealing performance, the sealing rings will wear down after prolonged use, which greatly reduces the sealing performance. Furthermore, the hydraulic cylinder is not a modular integrated assembly, which makes it more troublesome to disassemble and replace parts, resulting in poor practicality.

[0007] To address the aforementioned issues, a modular, quick-disassembly structure for hydraulic cylinders is proposed. Utility Model Content

[0008] (a) Technical problems to be solved To address the shortcomings of existing technologies, this application provides a modular quick-disassembly structure for hydraulic cylinders, which solves the problems mentioned in the background section.

[0009] (II) Technical Solution To achieve the above objectives, this application provides the following technical solution: a modular quick-disassembly structure for a hydraulic cylinder, comprising a cylinder barrel, a telescopic mechanism, a connecting and conveying mechanism, and a limiting mechanism. The cylinder barrel has an internal convenient disassembly buffer mechanism, which includes a slide groove. A slider is disposed within the slide groove. A retaining ring is fixedly connected to one side of the slider. A first sealing ring is fixedly connected to the side surfaces of the slider and the retaining ring. A buffer pad is fixedly connected to the upper side of the slider and the retaining ring. The slider is fixedly connected to the top of the slide groove by screws. A retaining groove is formed inside the cylinder barrel. A rear end cover is fixedly connected to the inside of the retaining groove by screws. A sealing pad is fixedly connected to the upper side of the rear end cover.

[0010] By adopting the above technical solution, two grooves are opened and two sliders are also set, with the two sliders fixed on both sides of the retaining ring.

[0011] Preferably, the groove is formed inside the cylinder, and the slider is slidably connected to the groove.

[0012] By adopting the above technical solution, the slider is slid into the top of the groove, and the slider is fixed to the top of the groove with screws. The first sealing ring ensures that the oil can only pass through the inside of the retaining ring.

[0013] Preferably, the telescopic mechanism includes a piston disposed inside the cylinder, a second sealing ring is fixedly connected to the outer side of the piston, a piston rod is fixedly connected to the upper side of the piston, and a first flange is fixedly connected to the upper end of the piston rod by screws.

[0014] By adopting the above technical solution, the piston slides inside the cylinder. The second sealing ring prevents oil from overflowing from the piston. When the piston rod retracts, the piston will touch the buffer pad.

[0015] Preferably, the connecting conveying mechanism includes an embedded groove, in which a third sealing ring is embedded, and conveying pipes are fixedly connected to both sides of the cylinder by screws, with a second flange fixedly connected to one end of the conveying pipe.

[0016] By adopting the above technical solution, the delivery pipe is connected to the inside of the cylinder, so that oil can be delivered into and out of the cylinder through the delivery pipe.

[0017] Preferably, the embedding groove is formed on the surface of the cylinder, and the delivery pipe is disposed on one side of the third sealing ring.

[0018] By adopting the above technical solution and setting the third sealing ring, the connection between the delivery pipe and the cylinder is made tighter, preventing oil leakage.

[0019] Preferably, the limiting mechanism includes a limiting groove, a deep groove is formed on the upper surface of the cylinder, a leakage groove is formed on the upper surface of the cylinder, a limiting ring is provided inside the deep groove, a locking block is fixedly connected to the side surface of the limiting ring, a fourth sealing ring is fixedly connected to the locking block and the lower side of the limiting ring, an auxiliary rod is fixedly connected to the upper side of the limiting ring, and the limiting ring is fixed inside the limiting groove by screws.

[0020] By adopting the above technical solution, the limiting ring is first inserted into the deep groove by setting the locking block. Then, the limiting ring is rotated by the auxiliary rod so that the fixing screw of the limiting ring is exposed from the groove. Finally, the limiting ring is fixed in the deep groove by the screw.

[0021] Preferably, the limiting groove is formed inside the cylinder barrel, and the limiting ring is slidably connected to the limiting groove.

[0022] By adopting the above technical solution, the locking block is inserted from the deep groove into the limiting groove through the setting of the deep groove, which can prevent the parts inside the cylinder from moving out of the cylinder. The setting of the fourth sealing ring can prevent the oil from overflowing from the limiting ring.

[0023] (III) Beneficial Effects This application provides a modular, quick-disassembly structure for a hydraulic cylinder. It offers the following advantages: 1. The modular quick-disassembly structure of this hydraulic cylinder features a sliding connection between the slide groove and the slider, secured with screws, allowing for quick disassembly and assembly of components such as the retaining ring; the rear end cover, secured by the retaining groove and screws, facilitates individual replacement. This design eliminates the need for complete disassembly when replacing worn parts, significantly simplifying the process, shortening maintenance time, and improving practicality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the entire application from the front view; Figure 2This is a three-dimensional structural diagram of the entire structure as seen from above in this application; Figure 3 This is a three-dimensional structural diagram of the entire application from a lower view; Figure 4 This is a schematic diagram of the first three-dimensional side view section of this application; Figure 5 This is a schematic diagram of the second type of three-dimensional side view section of this application.

[0026] In the diagram: 1. Cylinder; 101. Slide groove; 102. Slider; 103. Snap ring; 104. First sealing ring; 105. Buffer pad; 106. Snap groove; 107. Rear end cover; 108. Sealing gasket; 201. Piston; 202. Second sealing ring; 203. Piston rod; 204. First flange; 301. Embedded groove; 302. Third sealing ring; 303. Delivery pipe; 304. Second flange; 401. Limiting groove; 402. Deep groove; 403. Leakage groove; 404. Limiting ring; 405. Snap block; 406. Fourth sealing ring; 407. Auxiliary rod. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Reference Figures 1 to 5This application provides a modular quick-disassembly structure for a hydraulic cylinder, including a cylinder barrel 1, a telescopic mechanism, a connecting and conveying mechanism, and a limiting mechanism. The cylinder barrel 1 is provided with a convenient disassembly buffer mechanism, which includes a slide groove 101. A slider 102 is provided inside the slide groove 101. A retaining ring 103 is fixedly connected to one side of the slider 102. A first sealing ring 104 is fixedly connected to the side surfaces of the slider 102 and the retaining ring 103. A buffer pad 105 is fixedly connected to the upper side of the slider 102 and the retaining ring 103. The slider 102 is fixedly connected to the top of the slide groove 101 by screws. A retaining groove 106 is opened inside the cylinder barrel 1. A rear end cover 107 is fixedly connected to the inside of the retaining groove 106 by screws. A sealing pad 108 is fixedly connected to the upper side of the rear end cover 107. The slide groove 101 is opened inside the cylinder barrel 1, and the slider 102 is slidably connected to the slide groove 101. The cylinder barrel 1 is typically made of high-strength seamless steel pipe, such as seamless steel pipe made of No. 45 steel, which has good strength and toughness and can withstand high hydraulic pressure. The cutting accuracy of the slide groove 101 is controlled within ±0.05mm to ensure that the slider 102 can slide smoothly and accurately within it, reducing motion resistance and ensuring the stability of equipment operation. The slider 102 is made of aluminum alloy, which reduces its weight while ensuring a certain strength, making it easy to install and disassemble. It is fixed to the retaining ring 103 by welding, and the weld is ground to avoid stress concentration points. The first sealing ring 104 is made of nitrile rubber, which has excellent oil resistance and wear resistance, effectively preventing hydraulic oil leakage and ensuring normal operation of the equipment. The buffer pad 105 is made of polyurethane rubber, which has high elasticity and good cushioning performance, effectively absorbing the impact force generated when the piston 201 retracts, protecting the piston 201 and the inner wall of the cylinder barrel 1, and extending the service life of the equipment. The rear end cover 107 is made of cast iron, which has high compressive strength. It is connected to the cylinder 1 by screws. The screws are high-strength grade 8.8 to ensure a firm and reliable connection. The sealing gasket 108 is made of oil-resistant asbestos rubber sheet, which can effectively prevent leakage at the connection between the rear end cover 107 and the cylinder 1.

[0029] Reference Figure 1 , Figure 4 and Figure 5In one aspect of this embodiment, the piston 201 is made of cast steel, possessing high strength and rigidity, capable of withstanding hydraulic oil pressure. Its outer diameter is precisely controlled within ±0.03mm, maintaining a good fit clearance with the inner wall of the cylinder 1, ensuring smooth piston movement and preventing hydraulic oil leakage. The second sealing ring 202 is a combination seal of PTFE and rubber. This seal combines the low coefficient of friction of PTFE with the high elasticity of rubber, resulting in excellent sealing performance and a long service life. The piston rod 203 is made of 40Cr alloy steel, heat-treated and chrome-plated, with a chrome plating thickness of 0.02-0.03mm, improving the surface hardness, wear resistance, and corrosion resistance of the piston rod 203, ensuring normal operation even in harsh environments. The first flange 204 is made of Q235 carbon steel and is connected to the piston rod 203 with screws, facilitating connection to external load equipment and ensuring connection stability.

[0030] Reference Figure 1 , Figure 4 and Figure 5 In one aspect of this embodiment, the depth and width of the embedding groove 301 are precisely controlled within ±0.02 mm to ensure that the third sealing ring 302 can be tightly embedded therein, achieving a good sealing effect. The third sealing ring 302 is made of fluororubber, which has excellent high-temperature resistance, oil resistance, and chemical corrosion resistance, and can adapt to the needs of different working conditions in the hydraulic system. The delivery pipe 303 is made of stainless steel, such as 304 stainless steel, which has good corrosion resistance and pressure resistance, ensuring stable delivery of hydraulic oil. The second flange 304 is welded to the delivery pipe 303, and the welding quality is inspected to ensure no welding defects. The second flange 304 can be easily connected to other hydraulic components to achieve the integration of the hydraulic system.

[0031] Reference Figure 2 , Figure 4 and Figure 5 In one aspect of this embodiment, the machining accuracy of the limiting groove 401 and the deep groove 402 is controlled within ±0.03mm to ensure that the limiting ring 404 can be smoothly installed and slide stably within it. The limiting ring 404 and the locking block 405 are made of 45# steel and are hardened to improve their hardness and wear resistance. The fourth sealing ring 406 is made of nitrile rubber to prevent hydraulic oil from leaking from the connection between the limiting ring 404 and the cylinder 1. The auxiliary rod 407 is made of aluminum alloy, which is lightweight and easy to operate. The limiting ring 404 can be easily rotated through the auxiliary rod 407 to achieve its positioning and fixation within the limiting groove 401.

[0032] All electrical devices in this plan are powered by an external power source.

[0033] Working principle: When the hydraulic cylinder is working, hydraulic oil enters the cylinder 1 through the delivery pipe 303, pushing the piston 201 to slide inside the cylinder 1, thereby causing the piston rod 203 to extend or retract, realizing the driving of the external load. When the piston rod 203 retracts, the piston 201 will touch the buffer pad 105, which plays a buffering role, reducing the impact between the piston 201 and the bottom of the cylinder 1. During installation and maintenance, if it is necessary to replace the parts of the buffer mechanism that are easy to disassemble, the screws connecting the slider 102 and the slide groove 101 can be unscrewed, and the slider 102 and the retaining ring 103 can be removed from the slide groove 101; when replacing the rear end cover 107, simply unscrew the screws that fix the rear end cover 107 in the retaining groove 106. For the limiting mechanism, the limiting ring 404 is rotated by the auxiliary rod 407 so that the position of the fixing screw on the limiting ring 404 is exposed from the groove 403. After unscrewing the screw, the limiting ring 404 can be taken out from the limiting groove 401, which facilitates the maintenance or replacement of other components inside the cylinder 1.

[0034] While the hydraulic cylinder in the first prior art document provides a cushioning effect, its parts are inconvenient to replace and it is not a modular design. In contrast, the hydraulic cylinder in this application employs a modular design, such as easy disassembly of the cushioning mechanism. Its various components are connected by screws, etc., and replacement only requires removing the corresponding screws to quickly replace worn parts, greatly shortening maintenance time and improving equipment availability.

[0035] The second prior art document improves sealing performance by setting three sealing rings and using reinforcing rods for support, but the overall structure does not adopt a modular design, which makes disassembly and replacement of parts such as sealing rings cumbersome after wear and requires extensive disassembly of the hydraulic cylinder, affecting maintenance efficiency. In contrast, this application adopts a modular design, and each core functional component (such as the easy-to-disassemble buffer mechanism, limit mechanism, connecting and conveying mechanism, etc.) is combined through standardized interfaces (such as screw connection, slide groove fit), so there is no need to disassemble the whole system when replacing the seals.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular quick-disassembly structure for a hydraulic cylinder, comprising a cylinder barrel (1), a telescopic mechanism, a connecting and conveying mechanism, and a limiting mechanism, characterized in that: The cylinder (1) is provided with a convenient disassembly buffer mechanism, which includes a slide groove (101). A slider (102) is provided inside the slide groove (101). A retaining ring (103) is fixedly connected to one side of the slider (102). A first sealing ring (104) is fixedly connected to the side surfaces of the slider (102) and the retaining ring (103). A buffer pad (105) is fixedly connected to the upper side of the slider (102) and the retaining ring (103). The slider (102) is fixedly connected to the top of the slide groove (101) by screws. A slot (106) is provided inside the cylinder (1). A rear end cover (107) is fixedly connected to the inside of the slot (106) by screws. A sealing pad (108) is fixedly connected to the upper side of the rear end cover (107).

2. The modular quick-disassembly structure for a hydraulic cylinder according to claim 1, characterized in that: The groove (101) is formed inside the cylinder (1), and the slider (102) is slidably connected to the groove (101).

3. The modular quick-disassembly structure for a hydraulic cylinder according to claim 1, characterized in that: The telescopic mechanism includes a piston (201), which is located inside the cylinder (1). A second sealing ring (202) is fixedly connected to the outside of the piston (201). A piston rod (203) is fixedly connected to the upper side of the piston (201). A first flange (204) is fixedly connected to the upper end of the piston rod (203) by screws.

4. The modular quick-disassembly structure for a hydraulic cylinder according to claim 1, characterized in that: The connecting conveying mechanism includes an embedded groove (301), in which a third sealing ring (302) is embedded. The cylinder (1) is fixedly connected to both sides by screws with a conveying pipe (303), and a second flange (304) is fixedly connected to one end of the conveying pipe (303).

5. The modular quick-disassembly structure for a hydraulic cylinder according to claim 4, characterized in that: The embedding groove (301) is formed on the surface of the cylinder (1), and the delivery pipe (303) is set on one side of the third sealing ring (302).

6. The modular quick-disassembly structure for a hydraulic cylinder according to claim 1, characterized in that: The limiting mechanism includes a limiting groove (401), a deep groove (402) is provided on the upper surface of the cylinder (1), a leakage groove (403) is provided on the upper surface of the cylinder (1), a limiting ring (404) is provided inside the deep groove (402), a locking block (405) is fixedly connected to the side surface of the limiting ring (404), a fourth sealing ring (406) is fixedly connected to the lower side of the locking block (405) and the limiting ring (404), an auxiliary rod (407) is fixedly connected to the upper side of the limiting ring (404), and the limiting ring (404) is fixed inside the limiting groove (401) by screws.

7. The modular quick-disassembly structure for a hydraulic cylinder according to claim 6, characterized in that: The limiting groove (401) is opened inside the cylinder (1), and the limiting ring (404) is slidably connected to the limiting groove (401).

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