Upper die turnover mechanism for gravity casting machine

Abstract

The utility model relates to a gravity casting machine, in particular to an upper die turnover mechanism for the gravity casting machine. An upper die overturning mechanism for a gravity casting machine comprises a fixing frame and an upper die, the upper die comprises an upper die body and movable plates, the fixing frame comprises an upper fixing plate and a lower fixing plate, a plurality of stand columns are supported between the upper fixing plate and the lower fixing plate, a rotating shaft is rotationally fixed between two fixing blocks, the rotating shaft is fixed to the middles of the movable blocks, and the movable blocks are fixed to the upper die body. The front ends of all the movable blocks are fixed to the edge of the rear end of the movable plate, the rear ends of all the movable blocks are rotationally fixed to the upper end of an oil cylinder telescopic rod, and the lower end of the oil cylinder telescopic rod is rotationally fixed to the lower fixing plate. Limiting assemblies are arranged on the left side and the right side of the upper portion of the front end of the upper fixing plate correspondingly, each limiting assembly comprises a translation driver and a limiting block, and each limiting block is in an inverted-L shape. The device has the advantages of being convenient to be matched with a workpiece taking clamp for use and good in use reliability.

Description

Technical Field

[0001] This utility model relates to a gravity casting machine, specifically to an upper mold flipping mechanism for a gravity casting machine. Background Technology

[0002] In the production and manufacturing of wheel hubs, gravity casting machines are typically used. Existing gravity casting machines include a bottom mold, an upper mold, and side molds. The upper mold moves vertically, while the side molds move horizontally. This requires the presence of actuators on all sides and above the gravity casting machine, as shown in Chinese patent application number 202121160102.1. Furthermore, manual transfer of the cast workpiece is often necessary.

[0003] To reduce labor costs and improve production efficiency by using automated equipment such as part-retrieving grippers, tilting gravity casting machines, such as the one described in application number 202320215093.4, are used for wheel hub production. However, the ring-shaped parts with internal tooth structures on both sides of the casting machine occupy the space above the casting machine and limit the width of the part-retrieving grippers. Furthermore, the process requirements of some workpieces are not suitable for tilting gravity casting machines. Utility Model Content

[0004] The purpose of this invention is to provide a gravity casting machine upper mold flipping mechanism that is easy to use with part-retrieving grippers.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a gravity casting machine upper mold flipping mechanism, comprising a fixed frame and an upper mold, the upper mold comprising an upper mold body and a movable plate, the fixed frame comprising an upper fixed plate and a lower fixed plate, a plurality of columns supporting the upper fixed plate and the lower fixed plate, the upper fixed plate having a clearance groove in the middle for clearance of the mold body, the upper fixed plate having fixed blocks arranged opposite to each other on the left and right, the clearance groove being located between the two fixed blocks, a rotating shaft being rotatably fixed between the two fixed blocks, the rotating shaft being fixed to the middle of the plurality of movable blocks. All movable blocks are fixed at their front ends to the rear edge of the movable plate, and all movable blocks are rotatably fixed to the upper end of the hydraulic cylinder telescopic rod. The lower ends of the hydraulic cylinder telescopic rod are rotatably fixed to the lower fixed plate. Limiting components are provided on the left and right sides above the front end of the upper fixed plate. The limiting components include a translation driver fixed on the upper fixed plate and a limiting block fixed to the output end of the translation driver. The limiting block is inverted L-shaped and includes an upper section for pressing the movable plate downward and a lower section for pressing the movable plate laterally.

[0006] This utility model achieves the opening of the entire upper mold by setting a hydraulic telescopic rod, and the entire upper mold has a large flip angle, which avoids movement interference when the part removal fixture is used. In addition, there are no tall parts on the left and right sides of the upper fixed plate, and the limiting blocks are only set at the edge, which facilitates the design of the part removal fixture and ensures the normal use of the part removal fixture.

[0007] The upper fixed plate is used to support and position the movable plate, and the right fixed block is used to install the rotating shaft to ensure the stable rotation of the movable plate. This optimizes space utilization while ensuring the stability of the mechanism's movement. By setting a limit block, the end of the movable plate away from the rotating shaft can be pressed and positioned, thereby ensuring the stability of the gravity casting machine during use.

[0008] Preferably, the hydraulic cylinder telescopic rod is inclined, with its lower end located in front of its upper end. This arrangement optimizes the space occupied by the mechanism, making the entire flipping mechanism more compact. It also facilitates better power transmission during the upper mold flipping process, improving the smoothness and reliability of the movement, reducing interference problems during the movement, and providing more suitable space for the layout of peripheral automated equipment such as the part-picking gripper.

[0009] Preferably, the support columns include a rear support column located at the rear and a front support column located at the front. Front support columns are positioned between the left and right sides of the upper and lower fixed plates. The rear support column is positioned between the two front support columns. A clearance space is formed behind the front support columns and between the two front support columns to allow for the side mold to move. There are two movable blocks and two hydraulic cylinder telescopic rods, located on the left and right sides of the rear support columns. The clearance space behind the front support columns and between the two front support columns provides sufficient space for the lateral horizontal movement of the side mold, ensuring that the side mold can work normally and will not conflict with the upper mold flipping mechanism. The number and position of the movable blocks and hydraulic cylinder telescopic rods are matched with the overall structure, ensuring the upper mold flipping function while minimizing the impact on other components and the operating space, achieving a coordinated layout among the components.

[0010] Preferably, the upper section of the limiting block is detachably fixed with an inclined block, the lower end face of which is inclined, and the inclined surfaces of the two sides of the inclined block form a figure-eight shape. When the upper mold is flipped to the appropriate position, the figure-eight shaped inclined surface of the inclined block guides the movable plate to contact the limiting block more smoothly and achieve clamping and limiting. This improves the accuracy and reliability of the limiting, reduces impact and vibration during the limiting process, extends the service life of the equipment, and also helps to improve production efficiency because it enables faster and more stable positioning of the upper mold, reducing adjustment time.

[0011] Preferably, the rotation axis of the movable block and the upper end of the hydraulic cylinder telescopic rod is higher than the axis of rotation of the pivot. This arrangement optimizes the force transmission path and motion trajectory during movement, allowing the extension and retraction of the hydraulic cylinder telescopic rod to be more effectively converted into the flipping motion of the movable plate, thus improving the efficiency and stability of the movement. Simultaneously, it helps improve the stress condition of the mechanism, reducing adverse loads such as bending moments on various components, and increasing the overall load-bearing capacity and service life of the mechanism.

[0012] This utility model has the advantages of being easy to use with a part-retrieving clamp and having good reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a casting machine according to the present invention.

[0014] Figure 2 This is a schematic diagram of one structure of the upper mold flipping mechanism of this utility model. Detailed Implementation

[0015] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0016] Depend on Figure 1 and Figure 2 As shown, this embodiment discloses an upper mold flipping mechanism for a gravity casting machine, which is convenient to use with a lifting and translating part-removing fixture 100. It includes a fixed frame and an upper mold. The upper mold includes an upper mold body and a movable plate 10. The fixed frame includes an upper fixed plate 11 and a lower fixed plate 12. Several columns are supported between the upper fixed plate 11 and the lower fixed plate 12. The columns include a rear column 13 located on the rear side and a front column 14 located on the front side. Front columns 14 are provided between the left and right sides of the upper fixed plate 11 and the lower fixed plate 12. The rear column 13 is located between the two front columns 14. The rear of the front column 14 and the space between the two front columns 14 form a clearance space for the side mold.

[0017] In this embodiment, the upper fixed plate 11 is U-shaped, with a clearance groove 111 in the middle of the upper fixed plate 11 to allow space for the body of the upper mold. The upper fixed plate 11 has two fixed blocks 21 arranged opposite each other on the left and right sides. The clearance groove 111 is located between the two fixed blocks 21. A rotating shaft 22 is rotatably fixed between the two fixed blocks 21 through a bearing seat. The rotating shaft 22 is fixed to the middle of two movable blocks 23. The front ends of the movable blocks 23 are fixed to the rear edge of the movable plate 10, and the rear ends of the movable blocks 23 are rotatably fixed to the upper end of the hydraulic cylinder telescopic rod 20. The lower ends of the hydraulic cylinder telescopic rod 20 are rotatably fixed to the lower fixed plate 12. The hydraulic cylinder telescopic rod 20 is inclined, with the lower end of the hydraulic cylinder telescopic rod 20 located in front of the upper end of the hydraulic cylinder telescopic rod 20. There are two movable blocks 23 and two hydraulic cylinder telescopic rods 20, located on the left and right sides of the rear column 13. The rotation axis of the movable blocks 23 and the upper end of the hydraulic cylinder telescopic rod 20 is higher than the axis of the rotating shaft 22.

[0018] Limiting components are provided on both the left and right sides above the front end of the upper fixed plate 11. The limiting components include a translation driver 31 fixed on the upper fixed plate 11 and a limiting block 32 fixed to the output end of the translation driver 31. The limiting block 32 is inverted L-shaped and includes an upper section 321 for pressing and limiting the movable plate downward and a lower section 322 for pressing and limiting the movable plate laterally. Among them, an inclined block (not shown in the figure) is detachably fixed to the lower end surface of the upper section 321. The lower end surface of the inclined block is a slope, and the slopes of the inclined blocks on both sides form a figure-eight shape.

[0019] This embodiment has the advantages of being easy to use with a part-retrieving fixture and having good reliability.

Claims

1. A mechanism for turning over an upper mold of a gravity casting machine, comprising a fixed frame and an upper mold, the upper mold comprising an upper mold body and a movable plate, characterized in that: The fixed frame comprises an upper fixed plate and a lower fixed plate, a plurality of columns are supported between the upper fixed plate and the lower fixed plate, the upper fixed plate is provided with a clearance groove for accommodating the mold body, the upper fixed plate is provided with left and right fixed blocks, the clearance groove is located between the two fixed blocks, a rotating shaft is rotatably fixed between the two fixed blocks, the rotating shaft is fixed to the middle portions of a plurality of movable blocks, the front ends of all the movable blocks are fixed to the rear end edges of the movable plate, the rear ends of all the movable blocks are rotatably fixed to the upper ends of the oil cylinder telescopic rods, the lower ends of the oil cylinder telescopic rods are rotatably fixed to the lower fixed plate, left and right sides above the front end of the upper fixed plate are provided with limiting assemblies, the limiting assembly comprises a translation driver fixed to the upper fixed plate and a limiting block fixed to the output end of the translation driver, the limiting block is in inverted L shape and comprises a limiting block upper segment for downwardly pressing and limiting the movable plate and a limiting block lower segment for laterally pressing and limiting the movable plate.

2. The upper mold flipping mechanism for a gravity casting machine according to claim 1, characterized in that: The oil cylinder telescopic rods are obliquely arranged, and the lower ends of the oil cylinder telescopic rods are located in front of the upper ends of the oil cylinder telescopic rods.

3. The upper mold flipping mechanism for a gravity casting machine according to claim 1, characterized in that: The column comprises a rear column located at the rear side and a front column located at the front side, the upper fixed plate and the lower fixed plate are provided with the front column between the left and right sides, the rear column is located between the two front columns, the rear of the front column and between the two front columns form a clearance space for accommodating the opposite mold, the number of the movable blocks and the oil cylinder telescopic rods is two, and the two oil cylinder telescopic rods are located at the left and right sides of the rear column.

4. The upper mold flipping mechanism for a gravity casting machine according to claim 1, characterized in that: The limiting block upper segment is detachably fixed with an inclined block, the lower end surface of the inclined block is an inclined surface, and the inclined surfaces of the two inclined blocks form an eight-character shape.

5. The upper die flipping mechanism for a gravity casting machine according to claim 1, characterized in that: The rotating axis of the movable block and the upper end of the oil cylinder telescopic rod is higher than the axis of the rotating shaft.

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