Structure for decomposing stress concentration of cylinder head
By setting side grooves and buffer components on the inner annular groove sidewall of the cylinder head, the problem of vertical impact during hydraulic oil discharge is solved, the cylinder head is protected, and the risk of welding fracture is reduced.
Patent Information
- Application Number
- CN202520777793.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-23
AI Technical Summary
The vertical impact stress on the cylinder head caused by the hydraulic oil during the discharge process cannot be diffused, leading to the fracture of the welded section and posing a safety hazard.
Side grooves and buffer components, including buffer grooves and pressure relief grooves, are provided on the inner ring groove sidewall of the cylinder head. The impact force of the hydraulic oil is dispersed by the buffer rod, buffer plate and damper, and the pressure is released through the pressure relief groove and sealing plug.
It effectively disperses the impact force of hydraulic oil, reduces the risk of breakage at the cylinder head weld, and improves safety during use.
Smart Images
Figure CN223923458U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oil cylinder head protection technical field especially relates to a decomposed cylinder head stress concentration structure. BACKGROUND
[0002] The oil cylinder head is installed at the end of the oil cylinder body, and the structure seals the cylinder body, an oil injection hole is formed in the oil cylinder head, and the extension and retraction of the telescopic rod can be realized by injecting or discharging hydraulic oil. When the piston main body extrudes the hydraulic oil, the hydraulic oil in the cylinder body can also be discharged from the oil injection hole.
[0003] During the discharging process of the hydraulic oil, the hydraulic oil will be extruded into the oil injection hole. During this process, the cylinder head will be subjected to a large vertical impact. In the case where pressure relief is not possible, the impact stress cannot be diffused outward, which causes the cylinder head to be overloaded and easily causes the welding section to break. Therefore, a structure that can reduce such impact is needed to protect the connection safety of the cylinder head. SUMMARY
[0004] The utility model aims at the problems in the background art and provides a decomposed cylinder head stress concentration structure.
[0005] The technical scheme of the utility model is a decomposed cylinder head stress concentration structure, which comprises a cylinder head installed at the end of a cylinder body, the cylinder body and the cylinder head are fixed by welding at the outside connection, a piston rod is movably connected in the cylinder body, a piston main body is installed at the end of the piston rod, an inner ring groove is formed at the center position of one end of the cylinder head in the cylinder body, an oil injection hole is formed in the cylinder head, a side groove is formed in the side wall of the inner ring groove and corresponds to the oil injection hole, and a buffer assembly is arranged at the center position of the inner ring groove.
[0006] Preferably, the buffer assembly comprises a buffer groove and a pressure relief groove, the buffer groove is formed at the center position of the inner ring groove, a buffer rod is slidably connected in the buffer groove, a buffer plate is fixed at the end of the buffer rod extending out of the buffer groove, and the pressure relief groove is formed in the cylinder head and aligned with the inner side of the buffer groove.
[0007] Preferably, the pressure relief grooves are distributed in the peripheral circle of the buffer groove, a connecting hole is formed between the buffer groove and the pressure relief groove, a sealing plug is slidably connected in the pressure relief groove, and a damper is arranged between the sealing plug and the inner side wall of the pressure relief groove.
[0008] Preferably, a buffer spring is fixed between the buffer rod and the inner side wall of the buffer groove.
[0009] Preferably, a sealing ring is installed on the outer side of the buffer rod, which can ensure the air tightness of the buffer rod in the buffer groove and prevent the gas in the buffer groove from overflowing.
[0010] Compared with the prior art, the cylinder head stress concentration structure has the beneficial technical effects that: the side groove extending outward is arranged on the inner ring groove side wall of the cylinder head and is aligned with the oil injection hole, when the hydraulic oil is discharged through the oil injection hole, the impact force is diffused outward, the impact of the cylinder head is reduced, the risk of the cylinder head connection weld breaking is reduced, the buffer structure is arranged on the cylinder head, the impact of the piston rod is further buffered, and the use safety is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a cylinder body and cylinder head connection side section structure schematic view of the utility model;
[0012] Figure 2 It is a cylinder head front section structure schematic view of the utility model; Figure 1 It is an A place amplification structure schematic view of the utility model;
[0013] Figure 3 It is a cylinder head front section structure schematic view of the utility model;
[0014] Figure 4 It is a cylinder head appearance structure schematic view of the utility model.
[0015] Fig. 1, cylinder; 11, piston rod; 12, piston main body; 2, cylinder head; 21, oil injection hole; 22, inner ring groove; 23, side groove; 3, buffer plate; 31, buffer rod; 32, buffer groove; 33, buffer spring; 4, pressure relief groove; 41, connecting hole; 42, sealing plug; 43, damper. DETAILED DESCRIPTION
[0016] The technical scheme of the utility model is further described below in combination with the drawings and specific embodiments.
[0017] EMBODIMENT
[0018] As Figures 1-4 shown, the utility model discloses a kind of decomposed cylinder head stress concentration structures, including the cylinder head 2 of being installed in the end of cylinder 1, cylinder 1 and the welding fixed of cylinder head 2 outside connection, piston rod 11 is movably connected in cylinder 1, piston rod 11 end is equipped with piston main body 12, cylinder head 2 is located in the inner ring groove 22 of being arranged in the center position of one end in cylinder 1, cylinder head 2 is equipped with oil injection hole 21, inner ring groove 22 side wall and the side groove 23 of being arranged in the position corresponding to oil injection hole 21, inner ring groove 22 center position is provided with buffer assembly.
[0019] The buffer assembly comprises a buffer groove 32 and a pressure relief groove 4, the buffer groove 32 is arranged at the center of the inner ring groove 22, a buffer rod 31 is slidably connected in the buffer groove 32, the buffer rod 31 extends out of the buffer groove 32 and is fixed with a buffer plate 3, the pressure relief groove 4 is arranged in the cylinder head 2 and is aligned with the inner side of the buffer groove 32, the pressure relief groove 4 is distributed around the periphery of the buffer groove 32, a connecting hole 41 is arranged between the buffer groove 32 and the pressure relief groove 4, a sealing plug 42 is slidably connected in the pressure relief groove 4, a damper 43 is arranged between the sealing plug 42 and the inner side wall of the pressure relief groove 4, a buffer spring 33 is fixed between the buffer rod 31 and the inner side wall of the buffer groove 32, and a sealing ring is arranged on the outer side of the buffer rod 31, when the piston rod 11 presses the buffer plate 3, the buffer rod 31 is driven to slide and the buffer spring 33 is compressed, so that the impact force is buffered, when the buffer rod 31 slides into the buffer groove 32, the gas in the buffer groove 32 is compressed, so that the gas enters the sealing plug 42 through the connecting hole 41, the sealing plug 42 is driven to slide in the pressure relief groove 4, the output end of the damper 43 is compressed, and the buffering effect is further achieved.
[0020] In the embodiment, the cylinder head 2 is inserted into the cylinder body 1 at the middle position and is fixed by welding, at this time, the piston rod 11 and the piston body 12 can slide away from the cylinder head 2 in the cylinder body 1 by injecting hydraulic oil, and conversely, when the piston rod 11 and the piston body 12 move towards the cylinder head 2, the hydraulic oil is pressed out of the oil injection hole 21, in this process, because the side groove 23 is arranged on the side wall of the inner ring groove 22, the impact of the hydraulic oil on the cylinder head 2 is applied outward along the extension direction of the side groove 23, so that the vertical pressure of the hydraulic oil on the cylinder head 2 is reduced, the concentrated stress is reduced, and the risk of fracture of the welding position is reduced, when the piston rod 11 presses the buffer plate 3, the buffer rod 31 is driven to slide and the buffer spring 33 is compressed, so that the impact force is buffered, thereby achieving the purpose of protection, when the buffer rod 31 slides into the buffer groove 32, the gas in the buffer groove 32 is compressed, so that the gas enters the sealing plug 42 through the connecting hole 41, the sealing plug 42 is driven to slide in the pressure relief groove 4, the output end of the damper 43 is compressed, the buffering effect is further achieved, and the extension direction of the output end of the damper 43 is the extension direction of the inside and outside, so that the cylinder head 2 is not vertically pushed, and the concentrated stress is further dispersed.
[0021] The above specific embodiments are only several preferred embodiments of the utility model, based on the technical scheme of the utility model and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A cylinder head stress concentration decomposition structure, comprising a cylinder head (2) installed at the end of a cylinder block (1), characterized in that: The cylinder body (1) and cylinder head (2) are welded and fixed at the outer connection. A piston rod (11) is movably connected inside the cylinder body (1). A piston body (12) is installed at the end of the piston rod (11). An inner ring groove (22) is provided at the center of one end of the cylinder head (2) inside the cylinder body (1). An oil injection hole (21) is provided on the cylinder head (2). A side groove (23) is provided on the side wall of the inner ring groove (22) and at the position corresponding to the oil injection hole (21). A buffer assembly is provided at the center of the inner ring groove (22).
2. The cylinder head stress concentration decomposition structure according to claim 1, characterized in that, The buffer assembly includes a buffer groove (32) and a pressure relief groove (4). The buffer groove (32) is located at the center of the inner ring groove (22). A buffer rod (31) is slidably connected inside the buffer groove (32). The end of the buffer rod (31) extends out of the buffer groove (32) and is fixed with a buffer plate (3). The pressure relief groove (4) is located inside the cylinder head (2) and is aligned with the inner side of the buffer groove (32).
3. The cylinder head stress concentration decomposition structure according to claim 2, characterized in that, The pressure relief groove (4) is distributed around the periphery of the buffer groove (32). A connection hole (41) is provided between the buffer groove (32) and the pressure relief groove (4). A sealing plug (42) is slidably connected inside the pressure relief groove (4). A damper (43) is installed between the sealing plug (42) and the inner sidewall of the pressure relief groove (4).
4. A cylinder head stress concentration decomposition structure according to claim 2, characterized in that, A buffer spring (33) is fixed between the buffer rod (31) and the inner wall of the buffer groove (32).
5. A cylinder head stress concentration decomposition structure according to claim 2, characterized in that, A sealing ring is installed on the outside of the buffer rod (31).