A casting device for the driven wheel of an oil pumping unit

Abstract

The present invention discloses a casting device for a driven wheel of an oil pumping unit, belonging to the technical field of casting, including a lower mold. Six middle hole columns distributed annularly are fixedly connected inside the lower mold. An upper mold is arranged above the lower mold. The upper mold includes an outer mold base, a profiling metal inner mold, a counterpoint hole shell and a central pouring shell. In the present invention, the molten metal gradually fills the forming cavity through the central pouring shell. A plurality of extrusion columns move downward simultaneously to transfer pressure downward to the profiling metal inner mold, enabling the molten metal to move within the forming cavity to mix the molten metal entering successively. The profiling chill seat shapes the bottom of the deformed profiling metal inner mold under force, and at the same time completely covers the upper part of the connecting ribs and the inner and outer ring connection areas. Six hole area chill blocks cover the outer edge part of the narrow through holes of the connecting ribs themselves, enabling the component connection areas and through hole parts of the driven wheel casting to effectively solidify in sequence at a similar time, reducing the isolated hot spots in the connection areas.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and particularly relates to a casting device for a driven wheel of an oil pumping unit. Background Art

[0002] The driven wheel of the oil pumping unit is a transmission part used to connect the power machine on the oil pumping unit. The driven wheel of the oil pumping unit is mass-produced by metal casting. The molten metal is injected into the forming cavity in the casting mold through the gate at the upper part of the metal casting mold. The molten metal that enters successively mixes inside the forming cavity to raise the liquid level of the molten metal, so that the molten metal gradually fills the forming cavity, and is cooled and solidified in the metal casting mold to form the casting of the driven wheel of the oil pumping unit. The inner and outer rings of the driven wheel are connected by a middle connecting rib. The wall thickness of the outer and inner ring structures of the driven wheel is relatively thick, and the wall thickness of the middle connecting rib is smaller than that of the inner and outer rings of the driven wheel, so that the inner and outer parts of the middle connecting rib connecting the inner and outer rings are lower than the inner and outer rings of the driven wheel. Due to the problems of splicing position and uneven wall thickness at the connecting part of the middle connecting rib and the inner and outer rings of the driven wheel, multiple isolated hot spots at different positions are likely to appear in the connecting area between the inner and outer rings and the middle connecting rib, and the inner and outer ring connecting areas of the driven wheel casting and the through-hole parts on the connecting rib cannot be effectively sequentially solidified, resulting in multiple cooling differences in the connecting area, and it is easy to cause multiple shrinkage porosity defects at the outer edge parts of the connecting area and the narrow through-holes of the middle connecting rib itself, affecting the casting effect of the driven wheel of the oil pumping unit. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a casting device for a driven wheel of an oil pumping unit. By setting the upper mold to close the mold with the cooling mold together on the top of the lower mold, the molten metal gradually fills the forming cavity through the central casting shell, and multiple extrusion columns move downward simultaneously to press and transfer pressure to the profiled metal inner mold. The bottom part of the profiled metal inner mold deforms and impacts the molten metal in the forming cavity from the connecting area between the connecting rib and the outer ring of the driven wheel, effectively carrying out the regional movement of the molten metal inside the forming cavity to mix the molten metal that enters successively. The profiled chill seat and the six-hole area chill blocks can be lowered and clamped inside the bottom of the profiled metal inner mold and the six counter-position hole shells, so that the profiled chill seat completes the shaping of the bottom part of the profiled metal inner mold that is deformed by force, and at the same time completely covers the upper part of the connecting rib and the connecting area between the inner and outer rings. The six-hole area chill blocks cover the outer edge part of the narrow through-hole of the connecting rib itself, enabling the component connecting area and the through-hole part of the driven wheel casting to be effectively sequentially solidified at a similar time, reducing the isolated hot spots in the connecting area, so as to solve the problems raised in the above-mentioned background art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A casting device for the driven wheel of an oil pumping unit, comprising a lower mold. Six middle hole columns distributed in a ring are fixedly connected inside the lower mold. An upper mold is arranged above the lower mold. The upper mold includes an outer mold base, a profiling metal inner mold, a counterpoint hole shell and a central pouring shell. The outer mold base, the profiling metal inner mold and the central pouring shell are fixedly connected in sequence from outside to inside. The number of the counterpoint hole shells is six, and the six counterpoint hole shells are clamped outside the six middle hole columns through the profiling metal inner mold during mold closing. A cooling mold is arranged above the upper mold. The cooling mold includes a top plate, a profiling chill seat, a splicing bottom plate and hole area chill blocks. The profiling chill seat moves inside the profiling metal inner mold. The number of the hole area chill blocks is six, and the six hole area chill blocks are clamped at the bottom of the top plate through the splicing bottom plate. An active extrusion module is arranged above the cooling mold. The active extrusion module includes a combination ring and extrusion columns. The number of the extrusion columns is six, and the six extrusion columns move inside the top plate and the profiling chill seat through the combination ring to transmit pressure downward to the profiling metal inner mold.

[0006] Further, the outer mold base is snap-fitted to the top of the lower mold. The profiling metal inner mold is fixedly connected to the inner side wall of the outer mold base. The central pouring shell is fixedly connected to the inner side wall of the profiling metal inner mold. The bottom end of the central pouring shell is clamped at the central position of the inner side wall of the lower mold.

[0007] Further, the six counterpoint hole shells are fixedly connected in a ring to the bottom of the profiling metal inner mold. The counterpoint hole shells are snap-fitted into the staggered space between the corresponding middle hole columns and the lower mold.

[0008] Further, the profiling chill seat is snap-fitted into the profiling metal inner mold. A vertical column is fixedly connected to the top of the profiling chill seat, and the vertical column is inserted into the top plate.

[0009] Further, the splicing bottom plate is snap-fitted to the bottom of the profiling chill seat, and the six hole area chill blocks are inserted and fixed in a ring to the bottom of the splicing bottom plate.

[0010] Further, the bottoms of the profiling chill seat and the splicing bottom plate are both in close contact with the inner side wall of the profiling metal inner mold. The hole area chill blocks are snap-fitted into the corresponding counterpoint hole shells, and the bottoms of the hole area chill blocks are in close contact with the tops of the corresponding middle hole columns.

[0011] Further, the combination ring is located above the cooling mold, and the six extrusion columns are fixedly connected in a ring to the bottom of the combination ring.

[0012] Further, the extrusion columns are inserted into the top plate. Vertical guide grooves corresponding to the extrusion columns are formed inside the profiling chill seat, and the extrusion columns are snap-fitted to the vertical guide grooves.

[0013] Furthermore, both the extrusion posts and the vertical guide grooves are located in the connection area between the outer ring of the driven wheel and the connecting ribs, and the splicing bottom plate is located inside the extrusion posts.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] In the present invention, the upper die together with the cooling die is closed to the top of the lower die to form a molding cavity adapted to the casting of the driven wheel of the pumping unit. The molten metal gradually fills the molding cavity through the central pouring shell. By operating the combined ring, multiple extrusion posts can be simultaneously lowered to transfer pressure downward to profile the metal inner mold. The bottom part of the profiled metal inner mold deforms to apply force to the molten metal in the molding cavity from the connection area between the connecting ribs and the outer ring of the driven wheel, effectively carrying out the regional movement of the molten metal inside the molding cavity to mix the molten metal entering successively. The profiled chill seat together with the six-hole area chill blocks descends inside the profiled metal inner mold, enabling the profiled chill seat and the six-hole area chill blocks to be effectively clamped at the bottom of the profiled metal inner mold and inside the six alignment hole shells, allowing the profiled chill seat to complete the shaping of the bottom part of the profiled metal inner mold that undergoes force-induced deformation, while completely covering the upper part of the connecting ribs and the inner and outer ring connection areas. The six-hole area chill blocks cover the outer edge part of the narrow through holes of the connecting ribs themselves, enabling the component connection areas and through hole parts of the driven wheel casting to effectively undergo sequential solidification at a similar time, reducing the cooling difference in the connection area, reducing the isolated hot spots in the connection area, and improving the casting effect of the driven wheel of the pumping unit. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings in the embodiments.

[0017] Figure 1 It is a schematic structural diagram of the product of the existing driven wheel casting of the oil pumping unit;

[0018] Figure 2 It is a schematic structural diagram of the present invention;

[0019] Figure 3 It is a schematic cross-sectional structural diagram of the present invention in side view;

[0020] Figure 4 It is a schematic top view structural diagram of the present invention;

[0021] In the figure: 1. Lower die; 11. Middle hole column; 2. Upper die; 21. Outer die seat; 22. Profiled metal inner mold; 23. Alignment hole shell; 24. Central pouring shell; 3. Cooling die; 31. Top plate; 32. Profiled chill seat; 321. Column; 322. Vertical guide groove; 33. Splicing bottom plate; 34. Hole area chill block; 4. Movable extrusion module; 41. Combined ring; 42. Extrusion post. Detailed implementation manners

[0022] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Regarding the specific mechanical structure of the present invention, it will be clearly presented in the following detailed description of the structure. The structural contents mentioned in the following embodiments are all referenced to the drawings of the specification. Figures 1 to 4 The structural contents mentioned in the following embodiments are all referenced to the drawings of the specification.

[0023] Please refer to Figures 1 - 4 In the embodiment of the present invention, a casting device for a driven wheel of an oil pumping unit includes a lower mold 1. Six middle hole columns 11 distributed in a ring are fixedly connected inside the lower mold 1. An upper mold 2 is arranged above the lower mold 1. The upper mold 2 includes an outer mold base 21, a profiling metal inner mold 22, a counterpoint hole shell 23 and a central pouring shell 24. The outer mold base 21, the profiling metal inner mold 22 and the central pouring shell 24 are fixedly arranged from outside to inside in sequence. The number of the counterpoint hole shells 23 is six. The six counterpoint hole shells 23 are clamped on the outside of the six middle hole columns 11 through the profiling metal inner mold 22. A cooling mold 3 is arranged above the upper mold 2. The cooling mold 3 includes a top plate 31, a profiling chill seat 32, a splicing bottom plate 33 and hole area chill blocks 34. The profiling chill seat 32 is movably arranged inside the profiling metal inner mold 22. The number of the hole area chill blocks 34 is six. The six hole area chill blocks 34 are clamped on the bottom of the top plate 31 through the splicing bottom plate 33. An active extrusion module 4 is arranged above the cooling mold 3. The active extrusion module 4 includes a combination ring 41 and extrusion columns 42. The number of the extrusion columns 42 is six. The six extrusion columns 42 are movably arranged inside the top plate 31 and the profiling chill seat 32 through the combination ring 41 to transmit pressure downward to the profiling metal inner mold 22.

[0024] The lower mold 1 and the upper mold 2 are clamped to form a metal casting mold for the driven wheel of the oil pumping unit. Six middle hole columns 11 are arranged inside the lower mold 1. The six middle hole columns 11 are fixedly connected to the inner side wall of the lower mold 1 in a ring. The six middle hole columns 11 correspond to the positions of six through holes on the middle connecting ribs of the driven wheel of the oil pumping unit to ensure that the through holes on the middle connecting ribs are effectively formed during casting.

[0025] The upper mold 2 is composed of an outer mold base 21, a profiling metal inner mold 22, a counterpoint hole shell 23, and a central pouring shell 24. The profiling metal inner mold 22 is fixedly connected to the inner side wall of the outer mold base 21, and the central pouring shell 24 is fixedly connected to the inner side wall of the profiling metal inner mold 22, so that the outer mold base 21, the profiling metal inner mold 22, and the central pouring shell 24 are stably fixed together in sequence from the outside to the inside. The number of the counterpoint hole shells 23 is six, and the six counterpoint hole shells 23 are fixedly connected in a ring at the bottom of the profiling metal inner mold 22. The counterpoint hole shell 23 is snap-fitted into the staggered space between the corresponding middle hole columns 11 and the lower mold 1, so that the six counterpoint hole shells 23 can gradually descend and be clamped on the outside of the six middle hole columns 11 when the upper mold 2 is closed to the top of the lower mold 1. The outer mold base 21 is snap-fitted to the top of the lower mold 1, and the upper mold 2 is integrally and stably closed on the top of the lower mold 1, so that the upper mold 2 and the lower mold 1 cooperate to form a molding cavity that is integrally adapted to the casting of the driven wheel of the pumping unit. The bottom end of the central pouring shell 24 is clamped at the central position of the inner side wall of the lower mold 1, so that the bottom gate of the central pouring shell 24 is exposed inside the lower mold 1, so as to effectively pour molten metal into the molding cavity through the central pouring shell 24.

[0026] The cooling mold 3 is arranged above the upper mold 2. The cooling mold 3 is composed of a top plate 31, a profiling chill seat 32, a splicing bottom plate 33, and six hole area chill blocks 34. The profiling chill seat 32 is clamped and connected inside the profiling metal inner mold 22. The outer wall of the profiling chill seat 32 is closely attached to the inner side wall of the profiling metal inner mold 22, enabling the profiling chill seat 32 to move inside the profiling metal inner mold 22. A vertical column 321 is fixedly connected to the top of the profiling chill seat 32. The vertical column 321 is inserted into the top plate 31, and the vertical column 321 can vertically move inside the top plate 31 to control the profiling chill seat 32 to vertically move along the inner side wall of the profiling metal inner mold 22 inside the profiling metal inner mold 22, facilitating the adjustment of the position of the profiling chill seat 32 inside the profiling metal inner mold 22. The profiling chill seat 32 is clamped and positioned inside the profiling metal inner mold 22, and the top plate 31 can be positioned above the outer mold base 21 and the profiling metal inner mold 22 through the vertical column 321 at the upper position. At the same time, the top plate 31 can descend on the top of the outer mold base 21 to clamp and position the top plate 31 on the top of the outer mold base 21, enabling the cooling mold 3 to be stably clamped to the top of the upper mold 2. The splicing bottom plate 33 is clamped and connected to the bottom of the profiling chill seat 32. The number of the hole area chill blocks 34 is six. The six hole area chill blocks 34 are annularly inserted and fixed to the bottom of the splicing bottom plate 33, enabling the six hole area chill blocks 34 to be stably clamped and positioned at the designated position at the bottom of the top plate 31 through the splicing bottom plate 33. The six hole area chill blocks 34 correspond to six alignment hole shells 23. After the cooling mold 3 is clamped to the top of the upper mold 2, the six hole area chill blocks 34 can enter the inside of the alignment hole shells 23 from the top of the alignment hole shells 23, enabling the hole area chill blocks 34 to be clamped and positioned inside the corresponding alignment hole shells 23, effectively positioning the hole area chill blocks 34 at the designated position inside the forming cavity. The bottom of the hole area chill block 34 is closely attached to the top of the corresponding middle hole column 11, enabling the splicing of the hole area chill block 34 and the corresponding middle hole column 11. At the same time, the outer wall of the hole area chill block 34 is closely attached to the inner side wall of the alignment hole shell 23, achieving the effect of supporting and shaping the alignment hole shell 23 from the inside of the alignment hole shell 23 to ensure the formation of a fully adapted forming cavity. The bottom of the splicing bottom plate 33 is in an inclined state to effectively adapt to the inner side wall of the profiling metal inner mold 22, enabling the splicing bottom plate 33 to be closely attached and positioned on the inner side wall of the profiling metal inner mold 22. The splicing bottom plate 33 splices the profiling chill seat 32, ensuring the rotation of the profiling chill seat 32 inside the profiling metal inner mold 22.

[0027] The movable extrusion module 4 is connected to the cooling die 3. The movable extrusion module 4 is composed of a combined ring 41 and extrusion columns 42. The combined ring 41 is located above the cooling die 3. The number of extrusion columns 42 is six, and the six extrusion columns 42 are fixedly connected in a ring at the bottom of the combined ring 41. The extrusion columns 42 are inserted into the inner part of the top plate 31, so that the extrusion columns 42 can move vertically inside the top plate 31. Vertical guide grooves 322 corresponding to the extrusion columns 42 are formed inside the profiling chill seat 32. The extrusion columns 42 are engaged with the vertical guide grooves 322. The extrusion columns 42 moving vertically can enter downward into the vertical guide grooves 322 at corresponding positions on the profiling chill seat 32, so that the six extrusion columns 42 can move stably vertically inside the top plate 31 and the profiling chill seat 32 through the combined ring 41, and the position of the extrusion columns 42 inside the profiling metal inner mold 22 can be adjusted. The downward movement of the extrusion columns 42 inside the vertical guide grooves 322 can make the bottom ends of the extrusion columns 42 contact the bottom area of the profiling metal inner mold 22, and the extrusion columns 42 can press down to transmit pressure to the profiling metal inner mold 22, achieving the effect that the bottom area of the profiling metal inner mold 22 is stressed and deformed. Both the extrusion columns 42 and the vertical guide grooves 322 are located in the connection area between the outer ring of the driven wheel and the connecting ribs, which can make the profiling metal inner mold 22 be stressed and deformed from a specified position, so as to directly transmit pressure in the connection area for the force-bearing activity of the molten metal in the connection area, and improve the mixing effect of the molten metal entering each area successively. The splicing bottom plate 33 is located inside the extrusion columns 42 to ensure that the extrusion columns 42 will not contact the splicing bottom plate 33 when moving.

[0028] The lower die 1, the upper die 2 and the cooling die 3 are successively clamped. The upper die 2 clamps the cooling die 3 together to the top of the lower die 1 to form a molding cavity adapted to the casting of the driven wheel of the pumping unit. The molten metal is poured into the molding cavity through the central pouring shell 24 in the middle position. The liquid level of the molten metal gradually rises inside the molding cavity to fill the molding cavity. Press down the combined ring 41 to make the combined ring 41 push a plurality of extrusion columns 42 to move downward simultaneously. The extrusion columns 42 move downward from inside the top plate 31 into the profiling chill seat 32 and continue to move downward in the profiling chill seat 32 onto the profiling metal inner mold 22. Pressure is transmitted to the profiling metal inner mold 22 through the downward pressure of the extrusion columns 42. The bottom part of the profiling metal inner mold 22 deforms to apply force to the molten metal in the molding cavity from the connection area between the connecting rib and the outer ring of the driven wheel, effectively carrying out the regional movement of the molten metal inside the molding cavity to mix the successively entering molten metal. The profiling chill seat 32 moves downward inside the profiling metal inner mold 22 together with the six-hole area chill blocks 34, enabling the profiling chill seat 32 and the six-hole area chill blocks 34 to be effectively clamped at the bottom of the profiling metal inner mold 22 and inside the six alignment hole shells 23, allowing the profiling chill seat 32 to complete the shaping of the bottom part of the profiling metal inner mold 22 that undergoes force-induced deformation. The bottom of both the profiling chill seat 32 and the splicing bottom plate 33 is closely attached to the inner side wall of the profiling metal inner mold 22, capable of completely covering the upper part of the connection area between the connecting rib and the inner and outer rings. The six-hole area chill blocks 34 cover the outer edge part of the narrow through-hole of the connecting rib itself, enabling the component connection area and the through-hole part of the driven wheel casting to effectively undergo sequential solidification at a similar time, reducing the cooling difference in the connection area, reducing the isolated hot spots in the connection area, and improving the casting effect of the driven wheel of the pumping unit.

[0029] The working principle of the present invention is as follows: The upper mold 2 closes the mold together with the cooling mold 3 to the top of the lower mold 1, forming a molding cavity for the molten metal to enter between the lower mold 1 and the upper mold 2. The molten metal is poured into the molding cavity through the central pouring shell 24 located in the middle position. The liquid level of the molten metal gradually rises inside the molding cavity to fill the molding cavity. The lower pressing combined ring 41 is used to push the combined ring 41 to move multiple extrusion columns 42 downward simultaneously. The extrusion columns 42 move downward from inside the top plate 31 into the profiling chill base 32. The extrusion columns 42 continue to move downward onto the profiling metal inner mold 22 and transfer pressure to the profiling metal inner mold 22, causing the bottom of the profiling metal inner mold 22 to deform to impact the molten metal in the molding cavity from the connection area between the connecting rib and the outer ring of the driven wheel, causing the molten metal to have regional movement and mix the molten metal entering successively. By operating the upright column 321, the profiling chill base 32 is made to descend inside the profiling metal inner mold 22 together with the six-hole area chill blocks 34, causing the profiling chill base 32 to be clamped at the bottom of the profiling metal inner mold 22, shaping the bottom part of the stressed and deformed profiling metal inner mold 22 from the outside. The six-hole area chill blocks 34 are clamped inside the six counterpoint hole shells 23. The profiling chill base 32 completely covers the upper part of the connecting rib and the inner and outer ring connection areas. The six-hole area chill blocks 34 cover the outer edge part of the narrow through-hole of the connecting rib itself, enabling the component connection area and the through-hole part of the driven wheel casting to solidify in sequence at a similar time. After cooling and solidification are completed, the upper mold 2 is removed from the top of the lower mold 1, and then the molded oil pumping unit driven wheel casting is taken out from inside the lower mold 1.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting device for the driven wheel of an oil pumping unit, comprising a lower mold (1), wherein six middle hole columns (11) distributed in a ring shape are fixedly connected inside the lower mold (1), and it is characterized in that, An upper mold (2) is provided above the lower mold (1), the upper mold (2) comprising an outer mold base (21), a contoured metal inner mold (22), a positioning hole shell (23) and a central casting shell (24), the outer mold base (21), the contoured metal inner mold (22) and the central casting shell (24) are fixed in sequence from the outside to the inside, the number of the positioning hole shells (23) is six, and the six positioning hole shells (23) are molded on the outside of the six middle hole columns (11) through the contoured metal inner mold (22); A cooling mold (3) is provided above the upper mold (2), and the cooling mold (3) comprises a top plate (31), a contoured cold iron seat (32), a spliced ​​bottom plate (33) and a hole area cold iron block (34), wherein the contoured cold iron seat (32) moves inside the contoured metal inner mold (22), and the number of the hole area cold iron blocks (34) is six, and the six hole area cold iron blocks (34) are clamped to the bottom of the top plate (31) through the spliced ​​bottom plate (33); A movable extrusion module (4) is provided above the cooling mold (3), the movable extrusion module (4) comprising a combination ring (41) and extrusion columns (42), the number of the extrusion columns (42) being six, the six extrusion columns (42) being movable through the combination ring (41) within the top plate (31) and the contoured cold iron seat (32) to transfer pressure to the contoured metal inner mold (22) by downward pressure. The six alignment hole shells (23) are fixedly connected to the bottom of the contoured metal inner mold (22) in an annular shape, and the alignment hole shells (23) are snap-connected in the offset space between the corresponding middle hole column (11) and the lower mold (1); the splicing bottom plate (33) is snap-connected to the bottom of the contoured cold iron seat (32), and the six hole area cold iron blocks (34) are plugged and fixed to the bottom of the splicing bottom plate (33) in an annular shape.

2. The casting device for the driven wheel of an oil pumping unit according to claim 1, characterized in that, The outer mold base (21) is snap-connected to the top of the lower mold (1), the contoured metal inner mold (22) is fixedly connected to the inner wall of the outer mold base (21), the central casting shell (24) is fixedly connected to the inner wall of the contoured metal inner mold (22), and the bottom end of the central casting shell (24) is snap-connected to the center position of the inner wall of the lower mold (1).

3. The casting device of a driven wheel of an oil pumping unit according to claim 1, characterized in that, The contoured cold iron seat (32) is snap-connected inside the contoured metal inner mold (22), a column (321) is fixedly connected to the top of the contoured cold iron seat (32), and the column (321) is inserted into the top plate (31).

4. The casting device of a driven wheel of an oil pumping unit according to claim 1, characterized in that, The bottoms of the contoured cold iron seat (32) and the spliced ​​bottom plate (33) are both in close contact with the inner wall of the contoured metal inner mold (22); the hole area cold iron block (34) is snap-fitted and connected to the inside of the corresponding alignment hole shell (23); and the bottom of the hole area cold iron block (34) is in close contact with the top of the corresponding middle hole column (11).

5. The casting device for the driven wheel of an oil pumping unit according to claim 1, characterized in that, The combined ring (41) is located above the cooling mold (3), and the six extrusion columns (42) are fixedly connected to the bottom of the combined ring (41) in a ring shape.

6. The casting device for the driven wheel of an oil pumping unit according to claim 1, characterized in that, The extrusion post (42) is inserted into the top plate (31). A vertical guide groove (322) corresponding to the extrusion post (42) is formed inside the profiling chill seat (32), and the extrusion post (42) is engaged with the vertical guide groove (322).

7. The casting device of a driven wheel of an oil pumping unit according to claim 6, characterized in that, Both the extrusion post (42) and the vertical guide groove (322) are located in the connection area between the outer ring of the driven wheel and the connecting rib, and the splicing bottom plate (33) is located inside the extrusion post (42).

Images