Oil cylinder quick release structure of vacuum valve

Abstract

The utility model relates to the technical field of die-casting dies, and discloses an oil cylinder quick release structure of a vacuum valve, which comprises a vacuumizing insert arranged on a cavity of a movable die frame, a pull rod axially penetrating through the vacuumizing insert and controlling opening and closing of an extraction opening, and an oil cylinder in driving connection with the pull rod, a notch used for installing an oil cylinder is formed in the side face of the movable mold frame, two guide sliding strips which are arranged in a spaced mode and extend front and back are fixedly arranged on the inner top face of the notch, an inserting plate which can be in sliding fit with the two guide sliding strips is arranged at the top of the oil cylinder, and a threaded hole is formed in the front end face of each guide sliding strip. The front end face of the insertion plate is provided with through holes which are the same as the threaded holes in number and are in one-to-one correspondence with the threaded holes, and a screw is inserted into each through hole to be connected with the corresponding threaded hole. According to the quick release structure of the oil cylinder, the guide sliding strip is matched with the insertion plate, the whole oil cylinder can be pulled out only by screwing off a small number of screws, and the release steps and time are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to a quick-release structure for a vacuum valve cylinder. Background Technology

[0002] To improve casting quality, some die-casting molds are equipped with vacuum valves to evacuate the cavity. After evacuation, the gas in the cavity is reduced, the gas resistance of the molten metal is reduced, the fluidity is enhanced, and the molten metal can fill the cavity more evenly, making the surface of the die-casting part smoother and flatter, thus improving its surface quality. The effect of evacuation is even more obvious for die-casting parts with complex shapes.

[0003] A vacuum valve mainly consists of a vacuum insert connecting to the mold cavity, a pull rod controlling the opening and closing of the evacuation port on the vacuum insert, and a hydraulic cylinder driving the pull rod. The vacuum insert is connected to an external vacuum generating device via a vacuum filter. During die casting, the hydraulic cylinder, as the component driving the pull rod, operates at a high frequency. After prolonged use, the seals inside the hydraulic cylinder may wear and age, leading to leaks and other malfunctions. Traditional hydraulic cylinders are typically secured with numerous bolts. The distribution of these bolts can be complex, with some located in confined spaces within the mold, making them difficult to access. Disassembly requires specialized tools and a significant amount of time to unscrew each bolt, increasing the difficulty of disassembly.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a quick-release structure for the cylinder of a vacuum valve, which is intended to facilitate the disassembly and assembly of the cylinder in the vacuum valve for later maintenance or replacement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quick-release structure for a vacuum valve cylinder includes a vacuum insert mounted on the cavity of a moving mold core, a pull rod axially passing through the vacuum insert and controlling the opening and closing of the air extraction port, and a cylinder for drive connection with the pull rod. A notch for mounting the cylinder is provided on the side of the moving mold frame. Two spaced-apart guide strips extending forward and backward are fixed to the inner top surface of the notch. A plate is provided on the top of the cylinder to slide against the two guide strips. A threaded hole is provided on the front end face of each guide strip. A through hole, the same number as the threaded hole, is provided on the front end face of the plate. A screw is inserted into each through hole and connected to the corresponding threaded hole.

[0008] As a further improvement to the above technical solution, the hydraulic cylinder includes a hydraulic cylinder body and a top plate disposed on the hydraulic cylinder body, and the piston rod of the hydraulic cylinder body is connected to a tie rod through a coupling.

[0009] As a further improvement to the above technical solution, two flat grooves are provided on the side wall of the end where the tie rod connects to the coupling, and a snap-fit ​​mounting port is provided on the side wall of the coupling to fit into the flat groove of the tie rod, and an avoidance opening is provided on the top plate corresponding to the snap-fit ​​mounting port.

[0010] As a further improvement to the above technical solution, a radial positioning block is provided on the top plate, and a radial positioning groove that cooperates with the radial positioning block is provided on the side wall of the coupling.

[0011] As a further improvement to the above technical solution, the insert plate includes a flat plate and a limiting strip that is disposed on the front end face of the flat plate and extends laterally. The flat plate and the limiting strip are combined to form a T-shaped structure. A through hole is opened on each of the two ends of the limiting strip. The flat plate is fixed to the top plate by screws and has a through opening for the coupling to move.

[0012] As a further improvement to the above technical solution, the hydraulic cylinder is a thin-type hydraulic cylinder.

[0013] As a further improvement to the above technical solution, the bottom of the oil cylinder is provided with an L-shaped pad, and the vertical part of the L-shaped pad is connected to the moving mold frame by screws.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, the quick-release structure for hydraulic cylinders provided by this utility model, through the cooperation of guide strips and insert plates, allows the entire hydraulic cylinder to be pulled outward by only unscrewing a few screws, greatly reducing disassembly steps and time. For hydraulic cylinders located in complex positions such as confined spaces inside molds, this method avoids the trouble of using special tools to unscrew a large number of screws one by one, making disassembly work more convenient. This allows for timely repair or replacement of faulty hydraulic cylinders, helping to reduce production delays caused by hydraulic cylinder failures, ensuring the normal operation of die-casting production, and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is an assembly drawing of the quick-release structure of the hydraulic cylinder.

[0016] Figure 2 This is an exploded view of the quick-release structure of the hydraulic cylinder.

[0017] Figure 3 This is a schematic diagram of the hydraulic cylinder.

[0018] Figure 4 This is a schematic diagram of the quick-release structure of the hydraulic cylinder installed on the die-casting mold.

[0019] Explanation of main component symbols: 1-vacuum insert, 2-pull rod, 21-flat groove, 3-cylinder, 31-cylinder body, 32-top plate, 321-clearance opening, 33-coupling, 331-clamping mounting opening, 332-radial positioning groove, 34-radial positioning block, 4-moving mold frame, 41-notch, 5-guide strip, 51-threaded hole, 6-insertion plate, 61-flat plate, 62-limiting strip, 63-through hole, 64-through opening, 7-screw, 8-L-shaped pad, 9-vacuum filter. Detailed Implementation

[0020] This utility model provides a quick-release structure for the cylinder of a vacuum valve. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0021] Please see Figures 1 to 4 This utility model provides a quick-release structure for a vacuum valve cylinder, including a vacuum insert 1 mounted on the cavity of a moving mold core, a pull rod 2 axially passing through the vacuum insert 1 and controlling the opening and closing of the air extraction port, and a cylinder 3 for driving connection with the pull rod 2. A notch 41 for mounting the cylinder 3 is provided on the side of the moving mold frame 4. Two spaced guide strips 5 extending front-back are fixed to the inner top surface of the notch 41. A plate 6 is provided on the top of the cylinder 3, capable of slidingly engaging with the two guide strips 5. A threaded hole 51 is provided on the front end face of each guide strip 5. A through hole 63, the same number as the threaded holes 51, is provided on the front end face of the plate 6. A screw 7 is inserted into each through hole 63 and connected to the corresponding threaded hole 51. The vacuum insert 1 is connected to an external vacuum generating device via a vacuum filter 9.

[0022] The working principle of the quick-release structure of the vacuum valve cylinder 3 is as follows: A notch 41 for installing the cylinder 3 is provided on the side of the moving mold frame 4. Two spaced guide rails 5 extending forward and backward are fixed to the top surface of the notch 41. The insert plate 6 at the top of the cylinder 3 slides along the guide rails 5, allowing the insert plate 6 to move back and forth along the guide rails 5. When installing the cylinder 3, insert the insert plate 6 along the guide rails 5, aligning the through hole 63 on the insert plate 6 with the threaded hole 51 on the front end face of the guide rail 5. Then, insert the screw 7 to connect, thus fixing the cylinder 3 at the notch 41 of the moving mold frame 4. When disassembling the cylinder 3, simply unscrew the screw 7 and slide the cylinder 3 out along the guide rails 5.

[0023] Unlike traditional fixing methods that rely heavily on bolts and are difficult to access due to their complex locations, this quick-release structure for the hydraulic cylinder 3, through the cooperation of the guide strip 5 and the insert plate 6, allows the entire hydraulic cylinder 3 to be pulled outward by unscrewing only a few screws 7 (two in this case), greatly reducing disassembly steps and time. For hydraulic cylinders 3 located in complex positions such as the confined space inside the mold, this method avoids the hassle of using special tools to unscrew a large number of screws 7 one by one, making disassembly more convenient. This allows for timely repair or replacement of faulty hydraulic cylinders 3, helping to reduce production delays caused by hydraulic cylinder 3 malfunctions, ensuring the normal operation of die-casting production, and improving production efficiency.

[0024] Specifically, the hydraulic cylinder 3 includes a cylinder body 31 and a top plate 32 mounted on the cylinder body 31. The piston rod of the cylinder body 31 is connected to the pull rod 2 via a coupling 33, enabling precise power transmission. During the die-casting process, the hydraulic cylinder 3 drives the pull rod 2 to control the opening and closing of the evacuation port. This connection method allows the extension and retraction of the hydraulic cylinder 3 to be accurately converted into the corresponding movement of the pull rod 2, ensuring the accuracy of the evacuation port opening and closing, thereby better controlling the vacuuming process of the mold cavity. The oil inlet and outlet connectors on the cylinder body 31 are used to connect the oil circuit to control the lifting and retraction of the piston rod of the hydraulic cylinder 3, controlling the vacuuming time.

[0025] Two flat grooves 21 are formed on the side wall of the end of the tie rod 2 that connects to the coupling 33. A snap-fit ​​mounting opening 331, which engages with the flat grooves 21 of the tie rod 2, is formed on the side wall of the coupling 33. A clearance opening 321, corresponding to the snap-fit ​​mounting opening 331, is formed on the top plate 32. The two flat grooves 21 on the side wall of the tie rod 2 and the snap-fit ​​mounting opening 331 on the side wall of the coupling 33 engage with each other. This design provides a precise positioning method for the connection between the tie rod 2 and the coupling 33. During installation, the operator can easily align the tie rod 2 with the coupling 33, ensuring that the flat grooves 21 accurately engage with the snap-fit ​​mounting opening 331 without complex adjustments, thus speeding up the installation, improving assembly efficiency, and reducing human error during installation. The connected tie rod 2 and coupling 33 are stable and reliable, ensuring the stability of power transmission and ensuring that the tie rod 2 can accurately control the opening and closing of the vacuum valve's suction port, maintaining the normal operation of the vacuum valve.

[0026] When it is necessary to disassemble the hydraulic cylinder 3, pull the cylinder 3 forward. Since the coupling 33 and the tie rod 2 are engaged through the flat groove 21 and the snap-fit ​​mounting port 331, and the top plate 32 has a clearance opening 321 corresponding to the snap-fit ​​mounting port 331, the coupling 33 can be smoothly separated from the tie rod 2 during the process of pulling the hydraulic cylinder 3 forward. This design greatly simplifies the disassembly process, eliminating the need for complex tools or cumbersome operations, and saving disassembly time and labor costs.

[0027] Furthermore, a radial positioning block 34 is provided on the top plate 32, and a radial positioning groove 332 that mates with the radial positioning block 34 is provided on the side wall of the coupling 33. This arrangement allows for accurate positioning and installation of the coupling 33, ensuring that the snap-fit ​​mounting opening 331 on the coupling 33 faces rearward and aligns with the tie rod 2. Additionally, the radial positioning block 34 guides the coupling 33 to move linearly, preventing deflection that could affect the opening and closing performance of the tie rod 2.

[0028] Specifically, the insert plate 6 includes a flat plate 61 and a limiting strip 62 extending laterally from the front end face of the flat plate 61. The flat plate 61 and the limiting strip 62 combine to form a T-shaped structure. A through hole 63 is provided at each end of the limiting strip 62. The flat plate 61 is fixed to the top plate 32 by screws 7 and has a through opening 64 for the coupling 33 to move. When the insert plate 6 is connected to the threaded hole 51 on the front end face of the guide strip 5 through the through holes 63 at both ends of the limiting strip 62 with screws 7, the limiting strip 62 can effectively prevent the insert plate 6 from shaking in directions other than the front-back direction (such as left-right or up-down directions), thereby ensuring the positional stability of the hydraulic cylinder 3 after installation, guaranteeing the relative positional accuracy between the hydraulic cylinder 3 and components such as the pull rod 2, and facilitating the normal operation of the vacuum valve.

[0029] Preferably, the hydraulic cylinder 3 is a thin-type hydraulic cylinder 3. Space is often limited in die-casting molds. The design of the thin-type hydraulic cylinder 3 better adapts to the compact space inside the mold, especially at the notch 41 on the side of the moving mold frame 4 for mounting the hydraulic cylinder 3. Compared with traditional hydraulic cylinders 3, the thin-type hydraulic cylinder 3 occupies less space, reduces interference with the layout of other mold components, and makes the internal structure of the mold more compact and rational, contributing to a more optimized design within the limited mold space.

[0030] The bottom of the hydraulic cylinder 3 is equipped with an L-shaped pad 8, which supports the hydraulic cylinder 3 and prevents it from being suspended and unstable. The vertical part of the L-shaped pad 8 is connected to the moving mold frame 4 by screws, making the connection between the hydraulic cylinder 3 and the moving mold frame 4 more secure. This connection method can effectively resist the vibration and impact generated during the die casting operation, reduce the possibility of the hydraulic cylinder 3 loosening, maintain the accurate installation position of the hydraulic cylinder 3 on the moving mold frame 4, ensure the accuracy of the hydraulic cylinder 3 driving the pull rod 2 in the vacuum valve, and thus ensure the stable operation of the vacuuming process.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A quick-release cylinder structure for a vacuum valve, comprising a vacuum-drawing insert disposed on the cavity of a moving mold core, a pull rod axially passing through the vacuum-drawing insert and controlling the opening and closing of the suction port, and a cylinder for driving connection with the pull rod; characterized in that, The side of the moving mold frame has a notch for installing the hydraulic cylinder. Two spaced guide rails extending forward and backward are fixed on the inner top surface of the notch. The top of the hydraulic cylinder has a plate that can slide with the two guide rails. Each guide rail has a threaded hole on its front end face. The front end face of the plate has through holes that are the same number as the threaded holes and correspond one-to-one. A screw is inserted into each through hole and connected to the corresponding threaded hole.

2. The quick-release structure of the cylinder for the vacuum valve according to claim 1, characterized in that, The hydraulic cylinder includes a cylinder body and a top plate disposed on the cylinder body. The piston rod of the cylinder body is connected to a tie rod via a coupling.

3. The quick-release structure of the cylinder for the vacuum valve according to claim 2, characterized in that, Two flat grooves are provided on the side wall of the end where the tie rod connects to the coupling. The side wall of the coupling is provided with a snap-fit ​​mounting port that fits into the flat groove of the tie rod. The top plate is provided with a clearance opening corresponding to the snap-fit ​​mounting port.

4. The quick-release structure of the cylinder for the vacuum valve according to claim 2, characterized in that, A radial positioning block is provided on the top plate, and a radial positioning groove that mates with the radial positioning block is provided on the side wall of the coupling.

5. The quick-release structure of the cylinder for the vacuum valve according to claim 2, characterized in that, The insert plate includes a flat plate and a limiting strip that is disposed on the front end face of the flat plate and extends laterally. The flat plate and the limiting strip are combined to form a T-shaped structure. A through hole is opened on each of the two ends of the limiting strip. The flat plate is fixed to the top plate by screws and has a through opening for the coupling to move.

6. The quick-release structure of the cylinder for the vacuum valve according to claim 1, characterized in that, The hydraulic cylinder is a thin-type hydraulic cylinder.

7. The quick-release structure of the cylinder for the vacuum valve according to any one of claims 1-6, characterized in that, The bottom of the hydraulic cylinder is provided with an L-shaped pad, and the vertical part of the L-shaped pad is connected to the moving mold frame by screws.

Images