Alternating box nut wrenching core structure

Abstract

The utility model relates to core pulling technology field, concretely is alternating current box screw cap twisted tooth core pulling structure, including the twisted tooth core that rotates and install in the upper surface of bottom plate, and the upper surface of bottom plate swing joint has panel, the lower surface fixedly connected with fixed template of panel, the lower surface embedded connection has fixed core of fixed template, the lower surface fixedly connected with guide pillar of fixed template near four corner positions, in the utility model, the slide bar loses the fixation and can take out first, at this moment, the slide block loses the limit of slide bar, the hydraulic cylinder piston rod and the slide block lose the restraint of lower direction, can directly move the slide block downwards, make the slide block and the rack separate quickly, can take out the hydraulic cylinder to dismantle the bolt on the hydraulic cylinder in later period, realize the quick replacement of hydraulic cylinder, when reinstalling, the forward rotation trapezoidal double -end screw rod, the L shaped board is taken in the recess groove again and carries out the limit to the slide bar, the whole process does not need to dismantle the seat body and the rack, the maintenance of hydraulic cylinder does not influence the rack and the gear set inside mould.

Description

Technical Field

[0001] This utility model relates to the field of core-pulling technology, specifically to a core-pulling structure for AC box nuts with threaded connections. Background Technology

[0002] The AC box nut threaded core-pulling structure refers to a mold core-pulling mechanism used in the production of plastic nuts on AC distribution boxes (or AC junction boxes). Its core function is to smoothly demold the nut part with internal threads after injection molding. Some technical solutions have also emerged in the existing technology, such as the automatic demolding mold with internal and external threads described in announcement number: CN115366352B, which includes a fixed mold part and a moving mold part that can close the mold with each other, as well as a cutting anti-rotation mechanism and a threaded mechanism for demolding the product.

[0003] While the aforementioned device achieves product cutting and prevents rotation, facilitating subsequent core extraction, the overall length of the mold and hydraulic cylinder is quite large. It needs to be disassembled during transportation or maintenance of the hydraulic cylinder. The devices on the market are the same as the aforementioned device, using threaded components to fix the output end of the hydraulic cylinder and the rack. The rack also needs to be used with a limiting component. The connection between the output end and the rack is inside the limiting component, which means that the fixing component at the connection point can only be disassembled after the limiting component is removed, making it inconvenient to disassemble the hydraulic cylinder. Utility Model Content

[0004] The purpose of this utility model is to provide a threaded core-pulling structure for the nut of an AC box to solve the problems mentioned above in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The AC box nut threaded core pulling structure includes a threaded core rotatably mounted on the upper surface of a base plate, and a panel movably connected to the upper part of the base plate. A fixed template is fixedly connected to the lower surface of the panel, and a fixed mold core is embedded in the lower surface of the fixed template. Guide pillars are fixedly connected to the lower surface of the fixed template near the four corners. A movable template is slidably connected to the outer surface of the guide pillars. A support plate is fixedly connected to the lower surface of the movable template. An ejector plate assembly is provided between the support plate and the base plate. The ejector plate assembly slides with the support plate through a return rod.

[0007] A seat is fixedly connected to the side surface of the ejector plate assembly. A hydraulic cylinder is fixedly connected to one end of the seat. A fastening mechanism is provided on the upper surface of the seat. The fastening mechanism includes a mounting base, a trapezoidal double-ended lead screw, and an L-shaped plate. The mounting base is fixedly connected to the upper surface of the seat. The trapezoidal double-ended lead screw is rotatably connected to the inside of the mounting base. A lead screw nut is threaded onto the outer surface of the trapezoidal double-ended lead screw. The L-shaped plate is fixedly connected to the lower surface of the lead screw nut.

[0008] Furthermore, the upper surface of the moving template is embedded with a limiting frame, and the lower surface of the limiting frame is fixedly connected with an installation rod.

[0009] Furthermore, the coiled tooth core passes through the ejector plate assembly, the support plate, and the moving template. A rotating shaft is rotatably connected to the upper surface of the base plate. A first gear is fixedly connected to the outer surface of the rotating shaft. A second gear is fixedly connected to the outer surface of the rotating shaft. A third gear is fixedly connected to the outer surface of the coiled tooth core. The third gear and the second gear are meshed together.

[0010] Furthermore, the upper surface of the seat is provided with a sliding groove, and the L-shaped plate and the sliding groove are slidably connected.

[0011] Furthermore, the fastening mechanism also includes a bellows, a slider, and a rack. The bellows is detachably connected between the mounting base and the lead screw nut via a threaded assembly. The slider is slidably connected to the lower surface of the base, and the rack is engaged with the upper surface of the slider. The output end of the hydraulic cylinder is engaged with the slider.

[0012] Furthermore, the rack and the first gear are meshed together.

[0013] Furthermore, a slider is slidably connected to the lower surface of the slider, and a groove is formed on the outer surface of the slider. The L-shaped plate is slidably connected to the groove, and the L-shaped plate is in contact with the lower surface of the slider.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When the coiled tooth core rotates, the limit frame contacts the product to prevent the product from rotating synchronously. When the third gear rotates, it can drive the second gear to rotate, which in turn drives the coiled tooth core to rotate, thus performing the core pulling operation.

[0016] 2. The piston rod end of the hydraulic cylinder and the slider are engaged by a quick-release structure with a boss and a T-slot. The connection between the slider and the rack is similar. After the L-shaped plate is fully inserted into the groove, the L-shaped plate and the lower surface of the slider separate. After the slider is no longer fixed, it can be removed first. At this time, the slider loses the limit of the slider, and the piston rod of the hydraulic cylinder and the slider lose the downward constraint. The slider can be moved directly downward to quickly separate the slider from the rack. Later, the hydraulic cylinder can be removed by removing the bolts on the hydraulic cylinder, realizing the quick replacement of the hydraulic cylinder. When reinstalling, rotate the trapezoidal double-ended screw in the forward direction, and the L-shaped plate will be inserted into the groove again and limit the slider. The whole process does not require disassembling the base and the rack, so that the maintenance of the hydraulic cylinder does not affect the rack and the gear set inside the mold. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the moving template of this utility model;

[0019] Figure 3 This is a schematic diagram of the base structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the disassembled fastening mechanism of this utility model.

[0021] In the diagram: 1. Panel; 2. Fixed template; 201. Fixed mold core; 202. Guide pillar; 3. Moving template; 301. Limiting frame; 302. Mounting rod; 4. Support plate; 5. Ejector plate assembly; 6. Base plate; 601. Twisted core; 602. Rotating shaft; 603. First gear; 604. Second gear; 605. Third gear; 7. Seat; 701. Slide groove; 702. Hydraulic cylinder; 8. Fastening mechanism; 801. Mounting seat; 802. Trapezoidal double-ended lead screw; 803. Lead screw nut; 804. Bellows; 805. L-shaped plate; 806. Slider; 807. Rack; 9. Slide bar; 901. Groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 In this embodiment of the utility model, the AC box nut threaded core pulling structure includes a threaded core 601 rotatably mounted on the upper surface of the base plate 6, and a panel 1 is movably connected above the base plate 6. A fixed template 2 is fixedly connected to the lower surface of the panel 1. A fixed mold core 201 is embedded in the lower surface of the fixed template 2. Guide posts 202 are fixedly connected to the lower surface of the fixed template 2 near the four corners. A movable template 3 is slidably connected to the outer surface of the guide posts 202. A support plate 4 is fixedly connected to the lower surface of the movable template 3. An ejector plate assembly 5 is provided between the support plate 4 and the base plate 6. The ejector plate assembly 5 slides with the support plate 4 through a return rod. This is prior art and will not be described in detail here.

[0024] A seat 7 is fixedly connected to the side surface of the ejector plate assembly 5. A hydraulic cylinder 702 is fixedly connected to one end of the seat 7. A fastening mechanism 8 is provided on the upper surface of the seat 7. The fastening mechanism 8 includes a mounting base 801, a trapezoidal double-ended lead screw 802, and an L-shaped plate 805. The mounting base 801 is fixedly connected to the upper surface of the seat 7. The trapezoidal double-ended lead screw 802 is rotatably connected to the inside of the mounting base 801. A lead screw nut 803 is threadedly connected to the outer surface of the trapezoidal double-ended lead screw 802. The L-shaped plate 805 is fixedly connected to the lower surface of the lead screw nut 803.

[0025] Specifically, the panel (1) and the fixed template (2) are held still by the fixed side of the injection molding machine, the moving template (3) moves downward along the guide post (202), the support plate (4), the base plate (6) and the entire moving mold part leave the fixed template 2, the outer contour of the product first separates from the fixed mold core 201, the hydraulic cylinder 702 drives the threaded core 601 to rotate, so that the hydraulic cylinder 702 and the product are separated. When disassembling the hydraulic cylinder 702, the trapezoidal double-ended screw 802 is manually rotated, so that the screw nut 803 moves under the drive of the trapezoidal double-ended screw 802, so that the L-shaped plate 805 and the slide bar 9 are separated, making it easier to remove the hydraulic cylinder 702 later.

[0026] Example 1

[0027] like Figure 1-4 As shown, a limiting frame 301 is embedded and connected to the upper surface of the moving template 3, and an installation rod 302 is fixedly connected to the lower surface of the limiting frame 301. The coiled tooth core 601 passes through the ejector plate assembly 5, the support plate 4 and the moving template 3. A rotating shaft 602 is rotatably connected to the upper surface of the base plate 6. A first gear 603 is fixedly connected to the outer surface of the rotating shaft 602, a second gear 604 is fixedly connected to the outer surface of the rotating shaft 602, and a third gear 605 is fixedly connected to the outer surface of the coiled tooth core 601. The third gear 605 and the second gear 604 are meshed together.

[0028] In this embodiment, when the coiled core 601 rotates, the limiting frame 301 contacts the product to prevent the product from rotating synchronously. When the third gear 605 rotates, it can drive the second gear 604 to rotate, which in turn drives the coiled core 601 to rotate, thus performing the core-pulling operation.

[0029] Example 2

[0030] Based on Embodiment 1, in order to overcome the problem that it is inconvenient to disassemble the hydraulic cylinder 702 in Embodiment 1.

[0031] like Figure 1-4As shown, the upper surface of the base 7 is provided with a sliding groove 701, and the L-shaped plate 805 is slidably connected to the sliding groove 701. The fastening mechanism 8 also includes a bellows 804, a slider 806 and a rack 807. The bellows 804 is detachably connected between the mounting base 801 and the lead screw nut 803 through a threaded assembly. The slider 806 is slidably connected to the lower surface of the base 7, and the rack 807 is engaged with the upper surface of the slider 806. The output end of the hydraulic cylinder 702 is engaged with the slider 806.

[0032] In this embodiment, the piston rod end of the hydraulic cylinder 702 and the slider 806 are engaged by a quick-release structure with a boss and a T-slot. The connection between the slider 806 and the rack 807 is similar. The rack 807 and the first gear 603 maintain a backlash-free meshing. When the piston rod of the hydraulic cylinder 702 extends or retracts, the slider 806 moves linearly along the lower surface of the seat 7 and the slide bar 9. The rack 807 synchronously drives the first gear 603 to rotate, which in turn drives the rotating shaft 602 to rotate, and finally drives the coiled core 601 to rotate, thus completing the core pulling of the nut's internal thread.

[0033] like Figure 1-4 As shown, the rack 807 and the first gear 603 are meshed and connected. The lower surface of the slider 806 is slidably connected to the slide bar 9. The outer surface of the slide bar 9 is provided with a groove 901. The L-shaped plate 805 is slidably connected to the groove 901, and the L-shaped plate 805 and the lower surface of the slide bar 9 are in contact.

[0034] In this embodiment, when the hydraulic cylinder 702 needs to be disassembled, simply rotate the trapezoidal double-ended lead screw 802 in the reverse direction manually. The lead screw nuts 803 on both sides move towards the center position, and the L-shaped plate 805 moves synchronously along the groove 901 of the slide bar 9. At this time, the bellows 804 is compressed, providing dust protection for the lead screw nuts 803. After the L-shaped plate 805 is fully inserted into the groove 901, the L-shaped plate 805 and the lower surface of the slide bar 9 separate. The slide bar 9 can be removed after it loses its fixation. At this time, the slider 806 loses the limit of the slide bar 9, and the piston rod of the hydraulic cylinder 702 and... Once the slider 806 loses its downward constraint, it can be moved directly downwards, allowing it to quickly separate from the rack 807. Later, the hydraulic cylinder 702 can be removed by unscrewing the bolts, enabling its rapid replacement. During reinstallation, the trapezoidal double-ended lead screw 802 rotates forward, causing the L-shaped plate 805 to re-engage in the groove 901 and limit the movement of the slider 9. The entire process requires no disassembly of the base 7 or the rack 807, ensuring that maintenance of the hydraulic cylinder 702 does not affect the rack 807 or the gear set inside the mold.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A threaded core-pulling structure for a nut in an AC box, comprising a threaded core (601) rotatably mounted on the upper surface of a base plate (6), and a panel (1) movably connected above the base plate (6), a fixed template (2) fixedly connected to the lower surface of the panel (1), a fixed mold core (201) embedded in the lower surface of the fixed template (2), guide posts (202) fixedly connected near the four corners of the lower surface of the fixed template (2), a movable template (3) slidably connected to the outer surface of the guide posts (202), a support plate (4) fixedly connected to the lower surface of the movable template (3), an ejector plate assembly (5) provided between the support plate (4) and the base plate (6), and the ejector plate assembly (5) slidingly engaging with the support plate (4) via a return rod; Its features are, A seat (7) is fixedly connected to the side surface of the ejector plate assembly (5), and a hydraulic cylinder (702) is fixedly connected to one end of the seat (7). A fastening mechanism (8) is provided on the upper surface of the seat (7), and the fastening mechanism (8) includes: Mounting base (801) is fixedly connected to the upper surface of the base body (7); A trapezoidal double-ended lead screw (802) is rotatably connected to the inside of the mounting base (801), and a lead screw nut (803) is threaded onto the outer surface of the trapezoidal double-ended lead screw (802); The L-shaped plate (805) is fixedly connected to the lower surface of the lead screw nut (803).

2. The AC box nut threaded core-pulling structure according to claim 1, characterized in that, The upper surface of the moving template (3) is embedded with a limiting frame (301), and the lower surface of the limiting frame (301) is fixedly connected with an installation rod (302).

3. The AC box nut threaded core-pulling structure according to claim 1, characterized in that, The coiled tooth core (601) passes through the ejector plate assembly (5), the support plate (4), and the moving template (3). The upper surface of the base plate (6) is rotatably connected to a rotating shaft (602). The outer surface of the rotating shaft (602) is fixedly connected to a first gear (603). The outer surface of the rotating shaft (602) is fixedly connected to a second gear (604). The outer surface of the coiled tooth core (601) is fixedly connected to a third gear (605). The third gear (605) and the second gear (604) are meshed together.

4. The AC box nut threaded core-pulling structure according to claim 1, characterized in that, The upper surface of the seat (7) is provided with a sliding groove (701), and the L-shaped plate (805) and the sliding groove (701) are slidably connected.

5. The AC box nut threaded core-pulling structure according to claim 3, characterized in that, The fastening mechanism (8) further includes: The bellows (804) is detachably connected between the mounting base (801) and the lead screw nut (803) via a threaded assembly; The slider (806) is slidably connected to the lower surface of the base (7); A rack (807) is engaged with the upper surface of a slider (806), and the output end of the hydraulic cylinder (702) is engaged with the slider (806).

6. The AC box nut threaded core-pulling structure according to claim 5, characterized in that, The rack (807) and the first gear (603) are meshed together.

7. The AC box nut threaded core-pulling structure according to claim 6, characterized in that, The lower surface of the slider (806) is slidably connected to a slide bar (9), and the outer surface of the slide bar (9) is provided with a groove (901). The L-shaped plate (805) and the groove (901) are slidably connected, and the L-shaped plate (805) and the lower surface of the slide bar (9) are in contact.

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