Low-pressure casting sand core frame lifting device

Abstract

The utility model discloses a low-pressure casting sand core frame lifting device, which belongs to the technical field of low-pressure platform production line casting and comprises a casting platform, an H-shaped steel guide frame is fixedly mounted on one side of the casting platform, and a sand core frame component is longitudinally positioned and slidably connected to the lower portion of one side, opposite to the casting platform, of the H-shaped steel guide frame. A vertical oil cylinder part is fixedly installed on one side of a longitudinal rod of the H-shaped steel guide frame and located on the ground beside supporting legs of the casting platform, a supporting frame is fixed to the top end of the H-shaped steel guide frame, and a chain lifting mechanism is arranged on the upper portion of the supporting frame and comprises a first chain and a second chain. The head ends of the first chain and the second chain are fixed to the inner wall of one side of the supporting frame, and the free ends of the first chain and the second chain are connected to the sand core frame assembly. The free end of a piston rod of the oil cylinder piece is in meshing transmission connection with the ends, close to the head ends, of the first chain and the second chain and retracts to pull the sand core frame assembly to rise to one side of the casting platform.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-pressure platform production line casting, in particular to a low-pressure casting sand core frame lifting device. Background Art

[0002] Low-pressure casting is a casting method between pressure casting and gravity casting. It has the following advantages: First, the metal liquid fills the mold smoothly, which can avoid turbulence, impact and splashing of the metal, reduce oxidation slag, and improve the quality of the casting; second, the metal fills the mold under pressure, the fluidity increases, it is convenient to pour complex thin-walled castings, and the casting outline is clear; third, the casting crystallizes under pressure and can be fully compensated, so the casting structure is dense and the mechanical properties are improved; fourth, the riser can be reduced or omitted, and the unsolidified metal liquid can flow back to the crucible to reduce the loss of metal, so the process yield is high. Therefore, low-pressure casting is an important innovative means to achieve precision, thin-walled, lightweight and energy-saving products. It can comprehensively improve the quality of castings and realize energy-saving production with less or no excess, and has broad application prospects in the casting field. However, the current low-pressure casting production line usually requires manual loading and unloading for sand core casting, which increases labor intensity, and loading and unloading is very difficult and reduces efficiency.

[0003] After searching, the existing Chinese patent publication number: CN207806615U is an automatic continuous casting production line for castings, including a moving device for driving the sand box to move, and the moving device is sequentially provided with a box packing machine, a shot filling device, a vibration device, a pouring device, a cooling device, a steel shot recovery device, and the steel shot recovery device is connected to the shot filling device through a vibrating conveyor.

[0004] The cited patent literature also has the same problem. The low-pressure casting production line usually requires manual loading and unloading for sand core casting, which increases the labor intensity. At the same time, loading and unloading is very difficult and the efficiency is reduced. Utility Model Content

[0005] The utility model aims to provide a low-pressure casting sand core frame lifting device to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-pressure casting sand core frame lifting device, comprising a casting platform, an H-shaped steel guide frame is fixedly installed on one side of the casting platform, a sand core frame assembly is longitudinally positioned and slidably connected to the lower part of the side of the H-shaped steel guide frame facing away from the casting platform, a vertical oil cylinder is fixedly installed on one side of the longitudinal rod of the H-shaped steel guide frame and located on the ground beside the supporting foot of the casting platform, and a support frame is fixed on the top of the H-shaped steel guide frame;

[0007] A chain lifting mechanism is arranged on the upper part of the support frame, and the chain lifting mechanism comprises a first chain and a second chain, the head ends of the first chain and the second chain are fixed to the inner wall of one side of the support frame, and the free ends of the first chain and the second chain are respectively connected to the sand core frame assembly, and the free end of the piston rod of the cylinder member is meshed and transmission-connected with one end of the first chain and the second chain close to the head end, and contracts to pull the sand core frame assembly to one side of the casting platform.

[0008] Preferably, two groups of first supports are symmetrically fixed to the top surface of one end of the support frame close to the cylinder member, and a first rotating shaft is rotatably installed between the two opposite first supports.

[0009] Preferably, two first sprockets are matched side by side on the circumference of each of the first rotating shafts.

[0010] Preferably, a second support that is arranged opposite to each other is symmetrically and fixedly mounted on the top surface of the other end of the support frame, a second rotating shaft is rotatably connected between the two second rotating shafts, and a second sprocket is matched on the circumferential side of the second rotating shaft.

[0011] Preferably, a U-shaped support is fixedly installed on the top end of the piston rod of the oil cylinder member, and two transmission sprockets are rotatably installed in the U-shaped support via a pin shaft.

[0012] Preferably, after the head ends of the first chain and the second chain are fixed to the inner wall of one side of the support frame, the free ends are simultaneously wrapped downward to engage with the transmission sprocket, and then upward to engage and connect with the two first sprockets.

[0013] Preferably, the free end of the first chain is engaged with the two first sprockets and then fixedly connected downwardly to one end of the sand core frame assembly.

[0014] Preferably, the free end of the second chain engages with the two first sprockets and then extends horizontally to engage with the second sprocket, and then is fixedly connected downward to the other end of the sand core frame assembly.

[0015] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0016] The low-pressure casting sand core frame lifting device fixes the head ends of the first chain and the second chain to the inner wall of one side of the support frame, and the free ends of the first chain and the second chain are simultaneously wrapped downwardly and meshed with the transmission sprocket, and then meshed and connected to the two first sprockets upwardly, the free end of the first chain meshes with the two first sprockets and then is fixedly connected downwardly to one end of the sand core frame assembly, the free end of the second chain meshes with the two first sprockets and then extends horizontally to mesh with the second sprocket, and then is fixedly connected downwardly to the other end of the sand core frame assembly, the sand core frame is hung and raised to the casting platform to facilitate the sand core to be put into production, and the sand core frame is lowered to its original position after loading and use. The utility model has the beneficial effects of simple structure, convenient operation and low failure rate, replaces manual sand core loading and unloading, reduces labor intensity and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection state of the H-shaped steel guide frame and the sand core frame assembly of the utility model;

[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0022] Description of reference numerals:

[0023] In the figure: 1. casting platform; 2. H-shaped steel guide frame; 3. support frame; 4. sand core frame assembly; 5. cylinder member; 6. piston rod; 7. chain lifting mechanism; 8. sand core frame frame; 9. sand core frame plate; 10. moving wheel; 11. supporting cross bar; 12. lifting ring block; 13. U-shaped support; 14. transmission sprocket; 15. first chain; 16. second chain; 17. head end; 18. first support; 19. first rotating shaft; 20. first sprocket; 21. second support; 22. second rotating shaft; 23. second sprocket. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0025] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0026] This embodiment discloses Figures 1 to 4 A low-pressure casting sand core frame lifting device shown in the figure includes a casting platform 1, an H-shaped steel guide frame 2 is fixedly installed on one side of the casting platform 1, and a sand core frame assembly 4 is longitudinally positioned and slidably connected to the lower part of the side of the H-shaped steel guide frame 2 facing away from the casting platform 1. The sand core frame assembly 4 includes a sand core frame frame 8 and a plurality of sand core frame plates 9 installed inside the sand core frame frame 8 and four moving wheels 10 fixedly installed on the bottom surface of the sand core frame frame 8. An integrally formed support cross bar 11 is provided in the middle of the H-shaped steel guide frame 2, and a lifting ring block 12 is symmetrically welded on the top surface of one side of the top of the sand core frame frame 8 close to the H-shaped steel guide frame 2.

[0027] A vertical cylinder member 5 is fixedly installed on the ground beside the supporting foot of the casting platform 1 on one side of the longitudinal rod of the H-shaped steel guide frame 2 by bolts, and a U-shaped support 13 is fixedly installed on the top of the piston rod 6 of the cylinder member 5. Two transmission sprockets 14 are rotatably installed in the U-shaped support 13 through a pin shaft.

[0028] A support frame 3 is fixed to the top of the H-shaped steel guide frame 2, and a chain lifting mechanism 7 is arranged on the upper part of the support frame 3. The chain lifting mechanism 7 includes a first chain 15 and a second chain 16. Two groups of first supports 18 are symmetrically fixed to the top surface of one end of the support frame 3 close to the cylinder member 6, and a first rotating shaft 19 is rotatably installed between the two opposite first supports 18. Two first sprockets 20 are interference fit side by side on the circumference of each first rotating shaft 19. Oppositely arranged second supports 21 are symmetrically fixed to the top surface of the other end of the support frame 3, a second rotating shaft 22 is rotatably connected between the two second supports 21, and a second sprocket 23 is interference fit on the circumference of the second rotating shaft 22.

[0029] The head end 17 of the first chain 15 and the second chain 16 is fixed to the inner wall of one side of the support frame 3, and the free ends of the first chain 15 and the second chain 16 are respectively connected to the sand core frame assembly 4, and the free end of the piston rod 6 of the cylinder member 5 is meshed and connected with one end of the first chain 15 and the second chain 16 close to the head end 17, and contracts to pull the sand core frame assembly 4 to one side of the casting platform 1.

[0030] Specifically, after the head ends 17 of the first chain 15 and the second chain 16 are fixed to the inner wall of one side of the support frame 3, the free ends are simultaneously wrapped downward and meshed with the transmission sprocket 14, and then meshed and connected to the two first sprockets 20 upward. After the free end of the first chain 15 meshes with the two first sprockets 20, it is fixedly connected downward to one end of the sand core frame assembly 4. After the free end of the second chain 16 meshes with the two first sprockets 20, it extends horizontally and meshes with the second sprocket 23, and then is fixedly connected downward to the other end of the sand core frame assembly 4.

[0031] Specifically, a PLC for controlling the opening and closing of the oil cylinder 5 is installed on the outer wall of the casting platform 1, and the PLC model can be selected according to actual needs.

[0032] Working principle:

[0033] The low-pressure casting sand core frame lifting device fixes the head end 17 of the first chain 15 and the second chain 16 to the inner wall of one side of the support frame 3, and the free ends of the first chain 15 and the second chain 16 are simultaneously wrapped downwardly and meshed with the transmission sprocket 14, and then meshed upwardly and connected to the two first sprockets 20, and the free end of the first chain 15 meshes with the two first sprockets 20 and then is fixedly connected downwardly to one end of the sand core frame assembly 4, and the free end of the second chain 16 meshes with the two first sprockets 20 and then extends horizontally to mesh with the second sprocket 23, and then is fixedly connected downwardly to the other end of the sand core frame assembly 4;

[0034] The oil cylinder 5 drives the piston rod 6 to descend, and the first chain 15 and the second chain 16 are meshed and driven on the transmission sprocket 14, and the transmission sprocket 14 rotates in the U-shaped support 13, and the first chain 15 and the second chain 16 are respectively meshed with two first sprockets 20 and one second sprocket 23, and the sand core frame assembly 4 is lifted to the casting platform 1, which is conducive to the production of sand cores;

[0035] The oil cylinder 5 drives the piston rod 6 to rise, and under the cooperation of the deadweight of the sand core frame assembly 4, the first chain 15 and the second chain 16, the sand core frame assembly 4 descends and returns to its original position.

[0036] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0037] Although the 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 low-pressure casting sand core frame lifting device, comprising a casting platform (1), characterized in that: An H-shaped steel guide frame (2) is fixedly installed on one side of the casting platform (1); a sand core frame assembly (4) is longitudinally positioned and slidably connected to the lower part of the side of the H-shaped steel guide frame (2) facing away from the casting platform (1); a vertical oil cylinder component (5) is fixedly installed on the ground beside the supporting foot of the casting platform (1) on one side of the longitudinal rod of the H-shaped steel guide frame (2); and a support frame (3) is fixed on the top of the H-shaped steel guide frame (2); A chain lifting mechanism (7) is arranged on the upper part of the support frame (3), and the chain lifting mechanism (7) comprises a first chain (15) and a second chain (16), the head ends (17) of the first chain (15) and the second chain (16) are fixed to the inner wall of one side of the support frame (3), and the free ends of the first chain (15) and the second chain (16) are respectively connected to the sand core frame assembly (4), and the free end of the piston rod (6) of the oil cylinder member (5) is meshed and transmission-connected with one end of the first chain (15) and the second chain (16) close to the head end (17), and contracts to pull the sand core frame assembly (4) to rise to one side of the casting platform (1).

2. A low-pressure casting sand core frame lifting device according to claim 1, characterized in that: Two groups of first supports (18) are symmetrically fixed to the top surface of one end of the support frame (3) close to the oil cylinder member (5), and a first rotating shaft (19) is rotatably installed between the two opposing first supports (18).

3. A low-pressure casting sand core frame lifting device according to claim 2, characterized in that: Two first sprockets (20) are interference-fitted side by side on the circumference of each first rotating shaft (19).

4. The low-pressure casting sand core frame lifting device according to claim 3 is characterized in that: A second support (21) arranged opposite to each other is symmetrically and fixedly mounted on the top surface of the other end of the support frame (3); a second rotating shaft (22) is rotatably connected between the two second supports (21); and a second sprocket (23) is matched on the circumferential side of the second rotating shaft (22).

5. The low-pressure casting sand core frame lifting device according to claim 4 is characterized in that: A U-shaped support (13) is fixedly mounted on the top end of the piston rod (6) of the oil cylinder member (5), and two transmission sprockets (14) are rotatably mounted in the U-shaped support (13) via a pin shaft.

6. The low-pressure casting sand core frame lifting device according to claim 5, characterized in that: After the head ends (17) of the first chain (15) and the second chain (16) are fixed to the inner wall of one side of the support frame (3), the free ends are simultaneously wrapped downwardly and meshed with the transmission sprocket (14), and then meshed upwardly and connected to the two first sprockets (20).

7. The low-pressure casting sand core frame lifting device according to claim 6, characterized in that: The free end of the first chain (15) engages with two first sprocket wheels (20) and is then fixedly connected downward to one end of the sand core frame assembly (4).

8. The low-pressure casting sand core frame lifting device according to claim 7, characterized in that: The free end of the second chain (16) engages with the two first sprockets (20) and then extends horizontally to engage with the second sprocket (23), and then is fixedly connected downward to the other end of the sand core frame assembly (4).

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