Core pulling structure without burr residues for pressing block hole of double-gear steering gear
By using a double gear steering and lubrication system in the core extraction structure of the cushion hole, the problem of burr residue during the traditional core extraction process is solved, operating efficiency is improved and product scrapping is avoided.
Patent Information
- Application Number
- CN202421693409.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-17
AI Technical Summary
Traditional briquetting holes are prone to burr residues during the core extraction process, resulting in over-sanding and scrapping of the product.
The core pulling structure of the double gear steering block hole is adopted. The output rod is driven by the electric cylinder to drive the push rod movement, and the lubrication system is combined to ensure that the movable core is smoothly drawn out to avoid burrs.
It greatly reduces the time for deburring, improves the efficiency of the operator, and avoids the scrapping of products due to over-sanding.
Smart Images
Figure CN222957475U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of core-pulling manufacturing for press block holes, and particularly relates to a core-pulling structure without burr residue for the press block holes of a double-gear steering gear. Background Technique
[0002] With the increasing development of Made in China, the die-casting industry has also developed by leaps and bounds. The die-casting process and efficiency have been continuously improved, and various innovations have also occurred in the molds closely related to the die-casting industry. Among them, the requirements for mold design are getting higher and higher. Along with the improvement of mold design requirements, it has become particularly important to keep the product stable during die-casting and reduce the number of defects to improve OEE. Reducing the number of operators and improving the efficiency of employees has become one of the goals of maximizing the benefits of each die-casting factory. In the past, core-pulling and core-pulling sleeves were used for press block holes, but there were parting burrs remaining on the product surface, which were not easy for operators to remove. It was easy to cause product scrapping due to over-grinding. The core-pulling structure without burr residue for press block holes has well solved this problem and has been widely and regularly applied.
[0003] In the process of implementing this application, it was found that there were the following problems with this technology: The traditional press block hole uses core-pulling and a core-pulling sleeve, lacks a lubrication component, and there will be parting burrs on the product for the core-pulling sleeve, and the burrs require subsequent grinding operations. Over-grinding is easy to cause product scrapping.
[0004] Therefore, a core-pulling structure without burr residue for the press block holes of a double-gear steering gear is proposed. Content of the Utility Model
[0005] The purpose of the utility model is: In order to reduce the deburring time, greatly improve the efficiency of operators, and solve the problem of product scrapping due to over-grinding in the past, this application provides a core-pulling structure without burr residue for the press block holes of a double-gear steering gear.
[0006] The technical solution adopted by the utility model is as follows:
[0007] A core-pulling structure without burr residue for the press block holes of a double-gear steering gear, including a press block, a press block hole is provided inside the press block, a core-pulling sleeve and a movable core are arranged inside the press block hole, an activity chamber is arranged on the outer periphery of the side of the core-pulling sleeve away from the movable core, an electric cylinder chamber integrally formed with it is arranged on the outer surface of the side of the activity chamber away from the core-pulling sleeve, and an electric cylinder is arranged on the outer surface of the side of the electric cylinder chamber away from the core-pulling sleeve;
[0008] A set of first activity grooves and second activity grooves are respectively arranged on the top and the top outer surface of the activity chamber. The first activity groove penetrates through the bottom outer surface of the electric cylinder chamber. The output end of the electric cylinder is provided with an output rod. The outer periphery of the other side of the output rod is provided with a movable core. A push rod chamber is arranged inside the movable core, and a push rod is arranged on the inner surface of the push rod chamber.
[0009] Further, the other end of the output rod is fixedly connected to the push rod, the inner surface of the push rod chamber is slidably connected to the outer surface of the push rod, and two sets of second limiting rings are arranged in parallel on the outer surface of the movable core.
[0010] Further, a set of first springs are connected to the outer surfaces of the two sides of the two sets of second limiting rings close to each other, and the outer surfaces of the other sides of the two sets of first springs are respectively fixedly connected to the inner surface and the outer surface of the other end of the core pulling sleeve.
[0011] Further, the outer surface of the core pulling sleeve is slidably connected to the inner surfaces of the first movable groove and the second movable groove.
[0012] Further, a movable block is arranged at the other end of the push rod, a set of oil through grooves are arranged through the movable block perpendicular to the movement direction of the movable core, and a set of limiting chambers are arranged around the movable block.
[0013] Further, an oil storage chamber is arranged on one inner wall of the limiting chamber, a set of oil outlet holes are arranged through the inner wall of the limiting chamber symmetrically to one side of the oil storage chamber, and a second spring is arranged around the push rod.
[0014] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:
[0015] 1. In the present utility model, when the mold needs to be opened, the electric cylinder receives a control signal and starts to drive the output rod to move. The movement of the output rod drives the push rod to move. Due to the limiting effect of the limiting chamber, after the push rod moves a certain distance outwards, it will drive the movable core to move outwards. At this time, the oil through grooves on the movable block are communicated with the hole wall of the oil storage chamber, and the lubricating oil in the oil storage chamber reaches the inner wall of the pressure block hole through the oil outlet holes, ensuring that the movable core is smoothly and accurately withdrawn, thereby avoiding any burrs or residues on the inner wall of the pressure block hole.
[0016] 2. In the present utility model, due to the limiting effect of the second limiting ring and the first limiting ring on the surface of the core pulling sleeve, after the movable core is withdrawn a certain distance, the core pulling sleeve will move along with the movable core. As the movable core is gradually withdrawn, the rest of the mold also begins to separate, completing the mold opening process. During the withdrawal process, the lubrication system ensures that an appropriate lubrication state is maintained between the movable core and the pressure block hole, avoiding friction and damage. When the movable core extends into the pressure block hole, the corresponding side wall of the movable block blocks the output port of the oil storage chamber, ensuring the sealed storage of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of the whole of the present utility model;
[0018] Figure 2This is a cross-sectional view of the core-pulling component of the present utility model;
[0019] Figure 3 This is a cross-sectional view of the component when the lubrication component of the present utility model is opened;
[0020] Figure 4 This is a cross-sectional view of the component when the lubrication component of the present utility model is closed.
[0021] In the figure: 1 - pressure block; 2 - pressure block hole; 3 - activity chamber; 4 - electric cylinder chamber; 5 - electric cylinder; 6 - oil storage chamber; 7 - output rod; 8 - first limit ring; 9 - first activity groove; 10 - first spring; 11 - second limit ring; 12 - second activity groove; 13 - movable core; 14 - core-pulling sleeve; 15 - oil passage groove; 16 - oil outlet hole; 17 - movable block; 18 - second spring; 19 - push rod chamber; 20 - push rod; 21 - limit chamber. Specific implementation mode
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model. Embodiment
[0023] Refer to Figures 1-4 , a core-pulling structure without burr residue in the pressure block hole of a double-gear steering gear, including a pressure block 1. A pressure block hole 2 is opened inside the pressure block 1. A core-pulling sleeve 14 and a movable core 13 are arranged inside the pressure block hole 2. An activity chamber 3 is arranged on the outer periphery of the side of the core-pulling sleeve 14 away from the movable core 13. An electric cylinder chamber 4 integrally formed therewith is arranged on the outer surface of the side of the activity chamber 3 away from the core-pulling sleeve 14. An electric cylinder 5 is arranged on the outer surface of the side of the electric cylinder chamber 4 away from the core-pulling sleeve 14. A group of first activity grooves 9 and second activity grooves 12 are respectively opened on the top and top outer surface of the activity chamber 3. The first activity groove 9 penetrates the bottom outer surface of the electric cylinder chamber 4. The output end of the electric cylinder 5 is provided with an output rod 7. The other outer periphery of the output rod 7 is provided with a movable core 13. A push rod chamber 19 is arranged inside the movable core 13. A push rod 20 is arranged on the inner surface of the push rod chamber 19. Specifically, through the cooperation of the above structures, it can be ensured that when the mold is opened, the movable core can be smoothly and accurately withdrawn, avoiding any burrs or residues on the inner wall of the pressure block hole.
[0024] Refer to Figures 1-4, the other end of the output rod 7 is fixedly connected to the push rod 20, the inner surface of the push rod chamber 19 is slidably connected to the outer surface of the push rod 20, and two groups of second limit rings 11 are arranged in parallel on the outer surface of the movable core 13. Specifically, as the movable core 13 is gradually withdrawn, the rest of the mold also begins to separate, completing the mold opening process. During the withdrawal process, the lubrication system ensures that an appropriate lubrication state is maintained between the movable core 13 and the pressure block hole 2, avoiding friction and damage. On the outer surfaces of the mutually approaching sides of the two groups of second limit rings 11, a group of first springs 10 are connected respectively. The outer surfaces of the other sides of the two groups of first springs 10 are fixedly connected to the inner surface and the outer surface of the other end of the core pulling sleeve 14 respectively. Specifically, a group of first springs 10 are connected to the inner sides of the two groups of second limit rings 11 respectively, and the other ends of these springs are fixed to the inner and outer surfaces of the core pulling sleeve 14 respectively, realizing the limiting and buffering functions through the elastic force of the springs.
[0025] Refer to Figures 1-4 , the outer surface of the core pulling sleeve 14 is slidably connected to the inner surfaces of the first movable groove 9 and the second movable groove 12. Specifically, after the movable core 13 is withdrawn a certain distance, the core pulling sleeve 14 will move along with the movable core 13. At the other end of the push rod 20, there is a movable block 17, and a group of oil through grooves 15 are arranged vertically through the movable block 17 in the direction of the movement of the movable core 13. A limiting chamber 21 is arranged around the movable block 17. Specifically, while ensuring the precise movement of the push rod 20 and its movable block 17, the precise supply and effective use of lubricating oil are also realized, improving the performance and reliability of the overall system.
[0026] Refer to Figures 1-4 , on one inner wall of the limiting chamber 21, there is an oil storage chamber 6. A group of oil outlet holes 16 are arranged symmetrically through the inner wall of the limiting chamber 21 on one side of the oil storage chamber 6. A group of second springs 18 are arranged around the outer periphery of the push rod 20. Specifically, the oil outlet holes 16 are responsible for evenly guiding out the lubricating oil in the oil storage chamber 6. The push rod 20, as the core movable component, has a group of second springs 18 arranged around its outer periphery. This group of springs not only provides elastic support for the movement of the push rod, but also ensures the smoothness and accuracy of the push rod during the movement process.
[0027] The implementation principle of the core pulling structure embodiment of the burr-free residue in the pressure block hole of a double-gear steering gear in this application is as follows:
[0028] When the mold needs to be opened, the electric cylinder receives a control signal and starts to drive the output rod 7 to move. The movement of the output rod 7 drives the push rod 20 to move. Due to the limiting effect of the limiting chamber 21, after the push rod 20 moves a certain distance outward, it will drive the movable core 13 to move outward. At this time, the oil through grooves 15 on the movable block 17 are communicated with the hole wall of the oil storage chamber 6, and the lubricating oil in the oil storage chamber 6 reaches the inner wall of the pressure block hole through the oil outlet holes 16, ensuring that the movable core 13 is smoothly and precisely withdrawn, thereby avoiding any burrs or residues on the inner wall of the pressure block hole.
[0029] On the other hand, due to the limiting effect of the second limiting ring 11 and the first limiting ring 8 on the surface of the core-pulling sleeve 14, after the movable core 13 is pulled out a certain distance, the core-pulling sleeve 14 will move along with the movable core 13. As the movable core 13 is gradually pulled out, the rest of the mold also begins to separate, completing the mold-opening process. During the pulling-out process, the lubrication system ensures that an appropriate lubrication state is maintained between the movable core 13 and the pressure block hole 2 to avoid friction and damage. When the movable core 13 extends into the pressure block hole 2, the side wall of the corresponding movable block 17 blocks the output port of the oil storage chamber 6 to ensure the sealed storage of the lubricating oil.
[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A core-pulling structure for a double-gear steering gear with a burr-free pressing block hole, comprising a pressing block (1), characterized in that: A pressing block hole (2) is provided inside the pressing block (1), a core pulling sleeve (14) and a movable core (13) are arranged inside the pressing block hole (2), an activity chamber (3) is arranged on the periphery of a side of the core pulling sleeve (14) away from the movable core (13), an electric cylinder chamber (4) formed integrally with the activity chamber (3) is arranged on the outer surface of a side of the activity chamber (3) away from the core pulling sleeve (14), and an electric cylinder (5) is arranged on the outer surface of a side of the electric cylinder chamber (4) away from the core pulling sleeve (14); A group of first movable grooves (9) and second movable grooves (12) are respectively formed on the top and the outer surface of the top of the movable chamber (3); the first movable grooves (9) penetrate the outer surface of the bottom of the electric cylinder chamber (4); an output rod (7) is provided at the output end of the electric cylinder (5); a movable core (13) is provided on the outer periphery of the other side of the output rod (7); a push rod chamber (19) is provided inside the movable core (13); and a push rod (20) is provided on the inner surface of the push rod chamber (19).
2. A core-pulling structure with no burr remaining in the pressing block hole of a dual-gear steering gear as claimed in claim 1, characterized in that: The other end of the output rod (7) is fixedly connected to the push rod (20), the inner surface of the push rod chamber (19) is slidably connected to the outer surface of the push rod (20), and two sets of second limit rings (11) are arranged in parallel on the outer surface of the movable core (13).
3. A core-pulling structure with no burr remaining in the pressing block hole of a dual-gear steering gear as claimed in claim 2, characterized in that: The outer surfaces of the two sets of the second limiting rings (11) on one side close to each other are both connected to a set of first springs (10), and the outer surfaces of the other sides of the two sets of the first springs (10) are respectively fixedly connected to the inner surface and the outer surface of the other end of the core pulling sleeve (14).
4. A core-pulling structure with no burr remaining in the pressing block hole of a dual-gear steering gear as claimed in claim 1, characterized in that: The outer surface of the core pulling sleeve (14) is slidably connected to the inner surfaces of the first movable groove (9) and the second movable groove (12).
5. A core-pulling structure with no burr remaining in the pressing block hole of a dual-gear steering gear as claimed in claim 4, characterized in that: A movable block (17) is provided at the other end of the push rod (20), a group of oil grooves (15) are provided through the movable block (17) perpendicular to the moving direction of the movable core (13), and a limit chamber (21) is provided on the periphery of the movable block (17).
6. A core-pulling structure with no burr remaining in the pressing block hole of a dual-gear steering gear as claimed in claim 5, characterized in that: An oil storage chamber (6) is provided on one inner wall of the limiting chamber (21), a group of oil outlet holes (16) are provided through the inner wall of one side of the limiting chamber (21) symmetrically to the oil storage chamber (6), and a group of second springs (18) are provided around the outer periphery of the push rod (20).