Bottom sand unloading structure for evanescent mode sand box

Abstract

The utility model discloses a bottom sand unloading structure for evanescent mode sand box, which comprises a sand box body, a mounting seat is fixedly connected above the middle of one side of the sand box body, a hydraulic cylinder is rotatably connected to the inner wall of the mounting seat, the output end of the hydraulic cylinder is rotatably connected with a first rotating rod, and the first rotating rod is rotatably connected with a second rotating rod. A transmission rod is fixedly connected to one side of the first rotating rod, and a mounting plate is fixedly connected to the middle of the upper end of the sand box body. By starting the hydraulic cylinder, the first rotating rod drives the transmission rod to rotate in the mounting plate, and the first special-shaped missing gear drives the second special-shaped missing gear to rotate, so that the sliding strips of the second bottom plate and the first bottom plate slide in the slide ways, the bottom of the sand box body is opened, and sand is unloaded; the transmission rod drives the rotating pressing rod to rotate, the rotating pressing rod ejects the pushing rod downwards, sand on the inner wall of the sand box body is cleaned away through the scraping plate during discharging, and the sand discharging efficiency of the sand box can be improved through the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of lost foam sand box sand unloading components, in particular to a bottom sand unloading structure for a lost foam sand box. Background Art

[0002] In the lost foam casting process, the foam model is first buried in dry molding sand and vibrated, and then the runner and riser patterns protrude from the plane of the sand box. Pouring is carried out according to the process flow, the vaporized model disappears, and the molten metal replaces its position. After production is completed, the molding sand needs to be discharged from the sand box, so a sand unloading structure at the bottom of the sand box is required.

[0003] At present, the bottom sand unloading structure of most lost foam sand boxes is realized by opening the cylinder, rotating the two sand unloading plates, and opening the bottom of the sand box. When the lost foam is injected with high-temperature metal, the sand will expand, resulting in the increase of the adhesion between the sand and the inner wall of the sand box, and then the sand will stick to the inner wall of the sand box, which needs to be cleaned with a scraper, thus affecting the sand unloading efficiency and making it inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a bottom sand unloading structure for a lost foam sand box to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bottom sand unloading structure for a lost foam sand box, comprising a sand box body, a mounting seat is fixedly connected to the upper middle part of one side of the sand box body, the inner wall of the mounting seat is rotatably connected to a hydraulic cylinder, the output end of the hydraulic cylinder is rotatably connected to a rotating rod one, one side of the rotating rod one is fixedly connected to a transmission rod, a mounting plate is fixedly connected to the middle part of the upper end of the sand box body, the inner wall of the mounting plate is rotatably connected to the outer side wall of the transmission rod, one side of the outer side wall of the transmission rod is fixedly connected to a rotating pressure rod, one end of the rotating pressure rod is rotatably connected to a pushing rod, one side of the pushing rod is rotatably connected to a scraper, and the outer side wall of the scraper is slidably connected to the inner wall of the sand box body.

[0006] As a further preferred embodiment of the present technical solution, the other side of the outer wall of the transmission rod is fixedly connected to a special-shaped missing gear one, and one side is meshed with a special-shaped missing gear two, one side of the special-shaped missing gear two is fixedly connected to a rotating rod two, one side of the rotating rod two is rotatably connected to a bottom plate two, and the other side of the rotating rod one is rotatably connected to a bottom plate one.

[0007] As a further preferred embodiment of the present technical solution, four fixing ears are fixedly connected to the upper end of the sand box body.

[0008] As a further preferred embodiment of the present technical solution, the other side of the sand box body is rotatably connected to two stabilizing bars, and one side of the two stabilizing bars is rotatably connected to one side of the bottom plate 1 and the bottom plate 2 respectively.

[0009] As a further preferred embodiment of the present technical solution, a slideway is provided on one side of the sand box body near the edge, a slide bar is fixedly connected to one side of the inner wall of the bottom plate, and an outer wall of the slide bar is slidably connected to the inner wall of the slideway.

[0010] As a further preferred embodiment of the present technical solution, a connecting plate is fixedly connected to one side of the bottom plate, a fixing frame is rotatably connected to one side of the sand box body, a threaded rod is threadedly connected to one side of the inner wall of the fixing frame, and a clamping plate is fixedly connected to one end of the threaded rod.

[0011] The utility model provides a bottom sand unloading structure for a lost foam sand box, which has the following beneficial effects:

[0012] (1) The utility model starts the hydraulic cylinder, so that the rotating rod 1 drives the transmission rod to rotate in the mounting plate, and the special-shaped missing gear 1 drives the special-shaped missing gear 2 to rotate, so that the sliding strips of the bottom plate 2 and the bottom plate 1 slide in the slideway, and the bottom of the sand box body is opened to unload sand. When the bottom plate 2 and the bottom plate 1 are slowly opened, the transmission rod drives the rotating pressure rod to rotate, and the rotating pressure rod pushes the push rod downward, so that the scraper cleans the sand on the inner wall of the sand box body when unloading. This structure can improve the efficiency of sand unloading in the sand box.

[0013] (2) The utility model rotates the fixing frame to move one side of the fixing frame to the bottom of the connecting plate, and then rotates the threaded rod to fix one side of the clamping plate to the connecting plate. The cooperation between the connecting plate and the fixing frame improves the strength of the bottom plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A area;

[0016] Figure 3 It is a schematic diagram of the connection relationship between the rotating rod 1 and the bottom plate 1 in the utility model;

[0017] Figure 4 It is a partial structural schematic diagram of the utility model;

[0018] In the figure: 1. Sand box body; 2. Bottom plate 1; 3. Mounting plate; 4. Mounting seat; 5. Hydraulic cylinder; 6. Rotating rod 1; 7. Scraper; 8. Rotating pressure rod; 9. Push rod; 10. Fixed ear; 11. Special-shaped missing gear 1; 12. Special-shaped missing gear 2; 13. Connecting plate; 14. Fixed frame; 15. Threaded rod; 16. Clamping plate; 17. Rotating rod 2; 18. Slide bar; 19. Transmission rod; 20. Bottom plate 2; 21. Stabilizing rod; 22. Slideway. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figure 1 - Figure 4 As shown, in this embodiment, a bottom sand unloading structure for a lost foam sand box includes a sand box body 1, a mounting seat 4 is fixedly connected to the upper middle part of one side of the sand box body 1, the inner wall of the mounting seat 4 is rotatably connected to a hydraulic cylinder 5, the output end of the hydraulic cylinder 5 is rotatably connected to a rotating rod 6, one side of the rotating rod 6 is fixedly connected to a transmission rod 19, a mounting plate 3 is fixedly connected to the middle part of the upper end of the sand box body 1, the inner wall of the mounting plate 3 is rotatably connected to the outer side wall of the transmission rod 19, one side of the outer side wall of the transmission rod 19 is fixedly connected to a rotating pressure rod 8, one end of the rotating pressure rod 8 is rotatably connected to a push rod 9, one side of the push rod 9 is rotatably connected to a scraper 7, the outer side wall of the scraper 7 is slidably connected to the inner wall of the sand box body 1, and the outer side wall of the scraper 7 is slidably connected to the inner wall of the sand box body 1. Start the hydraulic cylinder 5, so that the rotating rod 16 drives the transmission rod 19 to rotate in the mounting plate 3, and the special-shaped missing gear 11 drives the special-shaped missing gear 2 12 to rotate, so that the bottom plate 20 and the slide bar 18 of the bottom plate 2 slide in the slideway 22, and the bottom of the sand box body 1 is opened to unload sand. When the bottom plate 20 and the bottom plate 2 are slowly opened, the transmission rod 19 drives the rotating pressure rod 8 to rotate, and the rotating pressure rod 8 pushes the push rod 9 downward, so that the scraper 7 cleans the sand on the inner wall of the sand box body 1 when unloading. This structure can improve the efficiency of sand unloading of the sand box, wherein two hydraulic cylinders 5 are installed on both sides of the sand box body 1. When unloading sand, the two hydraulic cylinders 5 are started at the same time, and the structures on both sides of the sand box body 1 are the same.

[0021] like Figure 1 , Figure 3 and Figure 4 As shown, the other side of the outer wall of the transmission rod 19 is fixedly connected to the special-shaped missing gear 11, and one side is meshed with the special-shaped missing gear 2 12, one side of the special-shaped missing gear 2 12 is fixedly connected to the rotating rod 2 17, one side of the rotating rod 2 17 is rotatably connected to the bottom plate 20, and the other side of the rotating rod 16 is rotatably connected to the bottom plate 12, and through the cooperation of the special-shaped missing gear 2 12 and the special-shaped missing gear 11, the bottom plate 12 and the bottom plate 20 can be moved synchronously.

[0022] like Figure 1 and Figure 4 As shown, four fixing ears 10 are fixedly connected to the upper end of the sand box body 1. Through the design of the fixing ears 10, the sand box body 1 can be lifted by a crane to unload sand.

[0023] like Figure 4 As shown, the other side of the sand box body 1 is rotatably connected to two stabilizing rods 21, and one side of the two stabilizing rods 21 is rotatably connected to one side of the bottom plate 1 2 and the bottom plate 2 20 respectively. Through the two stabilizing rods 21, the bottom plate 1 2 and the bottom plate 2 20 can be made more stable when moving.

[0024] like Figure 3 and Figure 4 As shown, a slideway 22 is provided on one side of the sand box body 1 near the edge, a slide bar 18 is fixedly connected to one side of the inner wall of the bottom plate 2, and the outer wall of the slide bar 18 is slidably connected to the inner wall of the slideway 22. Through the structural design of the slide bar 18 and the slideway 22, the sliding direction of the bottom plate 2 and the bottom plate 20 can be limited.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, one side of the bottom plate 2 is fixedly connected with a connecting plate 13, one side of the sand box body 1 is rotatably connected with a fixing frame 14, one side of the inner wall of the fixing frame 14 is threadedly connected with a threaded rod 15, and one end of the threaded rod 15 is fixedly connected with a clamping plate 16. By rotating the fixing frame 14, one side of the fixing frame 14 is moved to the bottom of the connecting plate 13, and then the threaded rod 15 is rotated to fix one side of the clamping plate 16 on the connecting plate 13. The cooperation between the connecting plate 13 and the fixing frame 14 improves the strength of the bottom plate 2.

[0026] The utility model provides a bottom sand unloading structure for a lost foam sand box, and the specific working principle is as follows:

[0027] When unloading sand from the sand box, first use a crane to lift the sand box body 1 through the fixed ear 10, and then rotate the multiple threaded rods 15 on the sand box body 1 to release the restrictions of the bottom plate 2 and the bottom plate 20, and turn on the hydraulic cylinder 5, so that the rotating rod 16 drives the transmission rod 19 to rotate in the mounting plate 3, and the special-shaped missing gear 11 drives the special-shaped missing gear 2 12 to rotate, so that the bottom plate 20 and the slide bar 18 of the bottom plate 1 2 slide in the slideway 22, and the bottom of the sand box body 1 is opened to unload sand. When the bottom plate 20 and the bottom plate 1 2 are slowly opened, the transmission rod 19 drives the rotating pressure rod 8 to rotate, and the rotating pressure rod 8 pushes the push rod 9 downward, so that when unloading, the scraper 7 cleans the sand on the inner wall of the sand box body 1, and the unloading is completed.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bottom sand unloading structure for a lost foam sand box, comprising a sand box body (1), characterized in that: A mounting seat (4) is fixedly connected to the upper middle of one side of the sand box body (1); a hydraulic cylinder (5) is rotatably connected to the inner wall of the mounting seat (4); an output end of the hydraulic cylinder (5) is rotatably connected to a rotating rod (6); a transmission rod (19) is fixedly connected to one side of the rotating rod (6); a mounting plate (3) is fixedly connected to the middle of the upper end of the sand box body (1); an inner wall of the mounting plate (3) is rotatably connected to the outer wall of the transmission rod (19); a rotating pressure rod (8) is fixedly connected to one side of the outer wall of the transmission rod (19); one end of the rotating pressure rod (8) is rotatably connected to a push rod (9); a scraper (7) is rotatably connected to one side of the push rod (9); and the outer wall of the scraper (7) is slidably connected to the inner wall of the sand box body (1).

2. The bottom sand unloading structure for a lost foam sand box according to claim 1, characterized in that: The other side of the outer wall of the transmission rod (19) is fixedly connected to a first shaped missing gear (11), one side of which is meshed with a second shaped missing gear (12), one side of the second shaped missing gear (12) is fixedly connected to a second rotating rod (17), one side of the second rotating rod (17) is rotatably connected to a second bottom plate (20), and the other side of the first rotating rod (6) is rotatably connected to a first bottom plate (2).

3. The bottom sand unloading structure for a lost foam sand box according to claim 1, characterized in that: Four fixing ears (10) are fixedly connected to the upper end of the sand box body (1).

4. The bottom sand unloading structure for a lost foam sand box according to claim 2, characterized in that: The other side of the sand box body (1) is rotatably connected to two stabilizing rods (21), and one side of the two stabilizing rods (21) is rotatably connected to one side of the bottom plate 1 (2) and the bottom plate 2 (20) respectively.

5. The bottom sand unloading structure for a lost foam sand box according to claim 2, characterized in that: A slideway (22) is provided on one side of the sand box body (1) near the edge, and a slide bar (18) is fixedly connected to one side of the inner wall of the bottom plate (2), and the outer wall of the slide bar (18) is slidably connected to the inner wall of the slideway (22).

6. The bottom sand unloading structure for a lost foam sand box according to claim 2, characterized in that: A connecting plate (13) is fixedly connected to one side of the bottom plate (2), a fixing frame (14) is rotatably connected to one side of the sand box body (1), a threaded rod (15) is threadedly connected to one side of the inner wall of the fixing frame (14), and a clamping plate (16) is fixedly connected to one end of the threaded rod (15).

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